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4 types of stone crushers' maintenance and efficient improvement | fote machinery

4 types of stone crushers' maintenance and efficient improvement | fote machinery

There are different types of stone crushers in mining industry such as jaw crusher, cone crusher, impact crusher, and sand making machine. This article will tell you how to maintain the 4 types of rock crushers and how to efficicently improve their performance.

Many stone crusher operators have a common coception that is "don't-fix-it-if-it-isn't-broke". They may want to save cost at the begining while the consequence is that they have to spend more money on repair and face interuption on production. That's why I always say that preventive and predictive is very important for all types of stone crusher.

Preventive means that by making regular checklist and inspections to keep crushers in good condition. Maintenance checklist is usually set up on a daily (8 hours), weekly (40 hours), monthly (200 hours), yearly (2,000 hours). Only doing that, can you prolong the machine's life span and maximize its value in crushing process.

Predictive refers to mornitoring the condition of crusher when it is running. By some maintenance tools such as lubricating oil temperature sensors, lubricating oil filter condition indicator, you can timely draw the machine data so that making a comparison between the real situation and normal state. Predictive can help you find problem early then timely removing thers issues before demage occuring.

Ractive means that even if your crushers have got problems, as long as you adopt correct solutions to respond, you still can get your machine back to normal. Next, I'll introduce important skills to maintain your equipment.

The cone crusher in the secondary or tertiary crushing proccess often fractures medium-hard or hard rocks like pebble, quartz, granite, etc. It is easy to get premature crusher failure, if operators cannot make a correct and timely inspection and maintenance.

Mantle in moveable cone and concave is fixed cone. Due to directly contacting with rock materials, the two wear parts need frequent maintenance and protection. So operators have to know the preparations and maintaining skills.

The working principle of impact crusher is that the spinning rotor under the driving of the motor can genetate strong impact force which make blow bars crush stone material into small pieces. Then the crushed material would be thrown by hammers towards, which makes another crushing process "stone to stone".

The sand making machine is also known as the vertical shaft impact crusher. Its working mode is that the material falls vertically from the upper part of the machine into the high-speed rotating impeller. The impeller is one of the important parts of the sand making machine, and it is also the most vulnerable part.

After the materials collide with each other, they will be pulverized and smashed between the impeller for multiple times and discharged from the lower part. The materials crushed by the device have an excellent particle size and are suitable for aggregate shaping, artificial sand making and highway construction.

In the face of such a dazzling market, how to choose the production equipment suitable for users' actual needs among the numerous equipment brands of many machinery manufacturers is a big problem for many large and small enterprises. Here we list top 4 world's construction equipment manufacturers for you to choose:

As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.

Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.

the complete guide to crushed stone and gravel

the complete guide to crushed stone and gravel

In this article, we are going to take a deep dive into the types of crushed stone and gravel, how they are made, and their basic applications. You may not be a quarry expert at the end, but you will understand the basics for your next concrete or hardscaping project!

Most crushed stone is produced in quarries and is crushed when machinery breaks up and crushes larger rocks. Instead of being shaped or formed naturally, such as in a riverbed or canyon, crushed stone is produced with man-made machinery and processes.

It begins with using a rock crusher in a quarry or site with plenty of large rocks. There are many types of crushers, but their main job is the same: Crush larger rocks into smaller pieces to be used for construction material.

Crushed stone is then passed through different screeners to be organized and stored in different piles according to their size. The screening process starts by removing larger stones, then medium stones, and eventually goes all the way down to the stone dust.

This screening is important because contractors need very specific types of crushed stone to complete different types of projects. For example, you dont want large stones in ready mix concrete, and you dont want stone dust in drainage systems.

After being sorted into different piles depending on the size of the stone, the stone is ready to be shipped from the quarry. Quarries deliver directly to job sites, to concrete plants, or to wholesale distributors who sell the stone through retail to customers.

Because large stones and quarries are hard on tires and require heavy metal, crushed stone was hard to make and transport until heavy machinery with tracks was developed. WW2 expedited the development of this machinery, and crushed stone began to be widely used in construction projects in the 1940s and 1950s.

Large-scale building projects, particularly in infrastructure like the Eisenhower Interstate System, helped usher in an era where crushed stone was used in almost every part of construction. Foundations, concrete, drainage systems, and roads were all needing large quantities of crushed stone.

An example of this often occurs when a road is being replaced or resurfaced. Many road construction companies are beginning to grind and crush the existing road as they remove it. This crushed road, which is essentially crushed stone, then becomes the base for the new road.

The exact amount of crushed stone recycling is unknown due to a lack of reporting. Much of the crushed stone is also recycled right on the construction site, especially with road construction, and this makes it difficult to measure.

The most common use for recycled crushed stone is as a base for roadways, especially when the old road can be torn up, crushed, and reused. Concrete blocks and bricks can also be crushed and recycled as a base.

Crushed stone often has an angular and jagged edge that occurs during the crushing process. Gravel, on the other hand, typically has a very smooth texture and surface because of the natural weathering and wear of being exposed to the effects of running water.

Metamorphic: Metamorphic rocks become changed through intense heat or pressure. Similar to clay hardening in an oven, metamorphic rocks become very hard and crystallized by intense or heat or pressure.

If you go to a creek or river, you see all types of rocks, both large and small. These larger rocks can be used for foundations or other building projects, but typically gravel is screened and only the smaller pieces are used.

Pea gravel: Pea gravel is some of the smallest gravel - typically or smaller in size. Pea gravel is often used in places like fish tanks, walkways, swimming pools, or other places where foot traffic occurs or small gravel is needed.

When thinking of construction, it is important to know what kinds of rock are ideal for specific applications. After all, if a rock type crumbles easily under pressure, you dont want to use it as a component in ready mix concrete or pavement.

Granite: An igneous rock that is durable and is easily polished. Because of the color, grain, and polishing ability; they are often used inside homes for countertops or on the outside of monumental or civic buildings. However, they can also be used on bridge piers and river walls.

Limestone: A sedimentary rock that is the most commonly used to make crushed stone in the United States. One of the most versatile rocks for construction, limestone is able to be crushed easily making it a primary rock used in ready mix concrete, road construction, and railroads. It is widely available in quarries across the country.

Slate: A metamorphic rock typically found in layers. Because it is easily mined and cut in these natural layers, it works well in applications requiring thin rock layers. Common examples are roofing tiles, certain types of chalkboards, gravestones, and some pavement applications.

Laterite: A metamorphic rock with a highly porous and sponge structure. It is easily quarried in block form and used as a building stone. However, it is important to plaster the surface to eliminate the pores.

Stone dust: This is the very fine dust, similar to sand, that is created as the stone is crushed. Stone dust is useful when tamping or packing stone, but it causes problems for applications where water needs to drain, such as behind a retaining wall.

Clean stone: If crushed stone is clean, it has been screened so the majority of the stone dust has been removed, but some dust is still mixed in. This is useful for the top layer of a stone driveway or other places where some minor compaction is not harmful.

Washed clean stone: This is stone that has been screened like clean stone, but then also washed to ensure there is no stone dust on the finished product. This is often used for drainage purposes, for ready mix concrete, or places that need aesthetic appeal, such as curbing or decorative stone.

Crushed stone: If you hear the generic crushed stone term, it usually refers to stone that has a mixture of stone dust in it. This type of stone is best used for a base when heavy compaction is needed. As a result, it is typically used for the base of concrete and paving projects, foundations of structures, and driveway bases.

Or, if we were putting the base down for a patio, we want stone that compacts well and makes a strong base. Therefore, we want our stone to have stone dust, so we would call the quarry and order 2 crushed stone.

When putting down gravel in a flowerbed, make sure you start by laying down a quality landscape fabric, securely stake the fabric in place, and then layer the gravel on top of the fabric, usually 2-3 thick.

Stone dust compacts and hardens, especially when it becomes wet. Since drains need to always be open, it is important to keep stone dust out of drains. Therefore, construction projects needing drainage systems make sure they use only stone that has been cleaned and washed.

Crushed stone and gravel will continue to be a staple in construction, decoration, and industry for years to come. As recycling picks up, mining and quarries may slow down, but we will always need crushed stone in general construction and industry.

If you want to learn more about ready mix concrete and preparing for it, read our blog post on the Beginner's guide to concrete and the complete guide to pouring concrete in different types of weather.

should know all about stone crusher plant - machine thug

should know all about stone crusher plant - machine thug

In the market, various kind of crusher plant is there and used in different industries for fulfilling the crushing needs but here we will talk all about the stone crusher plant. How stone crusher plant is working, what are the stone crusher machine is available in the market. Types of stone crusher plant available and kind of requirement plant fulfilled.

Earlier crushing plant is one-stop installation activities but nowadays as requirement changes, stone crusher plant technology, design, input, output, capacity changed. International brands continuously updating their product with technology, digitization, and artificial intelligence.

Stone crushing industry engaged in producing a crushed stone that used as a raw material for infrastructure projects like, road, highway, bridges, building canals, etc. All projects are considered as the core infrastructure work that gives the economy boom.

Stone crusher units are not alone. Along with these plants, stone mining also associated. In fact, stone mining is the primary activity, and the crushing plant is the secondary activity that can be considered.

The stone crusher plant will available from 50 TPH to 600 TPH (ton per hour). The plant can produce the 8 variants of material. Just to get the different variant material you also need to put the screening plant that just separates the different materials according to client or market demand.

Raw Material processed through the vibrating feeder to crusher gradually and crusher crushed the material into respective pieces. From Crusher material conveyed to belt conveyor for secondary crushing before went on vibrating screen plant. Vibrating screen plant separates the quality and qualified material to final products.

And unqualified material carried back to stone crusher and reprocesses it. Then again material went through the above process. The customer gets the required material according to the standard quality and different sizes.

To get the fine product from the crusher. We need to pass it through three types of crushers in stage-wise. First Primary Crusher in that direct material comes from mines. Secondary crusher process the primary crusher material that already crushed at material size reduced and tertiary crusher which reduces the material size further. The manufacturer gets the desired size. That can be further supply to users.

A jaw crusher is the compression kind of crusher and used for crushing rock between two heavy steel jaws. The movable jaw compresses the material against the fixed jaw and crushes material at the desired size. Material exits from the bottom of jaws.

Double toggle jaw crusher is heavier and lots of moving parts than the single toggle jaw crusher. The main difference is the position of eccentric between both of them. Jaw crusher available in three variant mobile, stationary, and portable design whatever customer suits and full fills there need may consider it.

Cone Crusher also called a gyratory crusher. Cone crusher also a compression kind of machine that reduces, squeezing, or compressing the material between a moving piece of steel and a stationary piece of steel. The material passed it through the bottom of the machine after passed the cavity.

The material gets in the feeder from the upper side and material output from the bottom. Cone crusher generally delivers the material 4:1 or 6:1 ratio. The below picture will clear more you about the Cone crusher.

It consists the two opposite direction driven cylinders that mounted on horizontal shafts. The gap between the both cylinders can be adjusted according to desired results. Generally both cylinders cover with the manganese steel liners.

There is two kinds of roller crusher 1, Double roll crusher. 2, Single roll crusher. Name itself clears you both work. In double roller two cylinders are set up while in single roller crusher only has a cylinder that move at one place attached with horizontal shaft and material grind between the cylinder and inside body.

Impact crusher is process the material by compression & force between two surfaces towards one another to crush the material caught between them. Material contain in the chamber that open according to desired result from bottom.

Vertical Shaft Impact Crusher is generally used in the last phase. VSI looks like a cone crusher from outside but working style different in both of them. In vertical shaft crusher, shaft putted in vertical way.

Production Requirement What actually production requirement you have. Many a time companies setup the plant especially for specific projects only. So you need to consider your whole project requirement.

Ore Characteristics Material you want to crush or output you want. That really impacts your decision like if you need the fine product then you may go for the roller crusher. So according to need of material you need to setup the plant.

Operational Considerations Operational consideration means you might have constraint in operation like location. Location might be the operational constraint or labour constraint. Plant may near to your mining that reduce your transpiration cost but you may not allow doing so.

Disclosure: We are a professional blogging site that receives compensation from the companies whose products we review. We test each product thoroughly and give high marks to only the very best. We are independently owned and the opinions expressed here are our own.

used stone crusher for sale. white lai equipment & more | machinio

used stone crusher for sale. white lai equipment & more | machinio

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5 types of stone crushers | application and maintenance

5 types of stone crushers | application and maintenance

Stone crusher is mainly used for crushing operation in quarry crushing plant and mining plant. There are 5 types of stone crushers: jaw crusher, impact crusher, hammer crusher, cone crusher, and VIS crusher. What is the application of the 5 types of stone crushers and how to maintenance? This article is about a thorough introduction.

Jaw crusher is a heavy-duty which crushing the hard rock. Therefore, the jaw crusher parts need to be very hard and durable. In particular, the two components of the jaw crusher work, the fixed jaw, and the movable jaw. The crushers machine are widely used in industries of mining, building materials, roads, railways, water conservancy, and chemical. The types of jaw stone crusher: single toggle jaw crusher and double toggle jaw crusher.

During the maintenance of the jaw crushers, wear part is a common occurrence. This is also the main wear in the stone crushing line. Therefore, we recommend that customers purchase high-quality jaw crushers, which are more durable and have better running performance. During use, it can avoid many unnecessary wear problems and reduce the trouble of frequently changing parts. 8 notes of jaw crusher routine maintenance.

1. Check the heat of the bearing. The temperature of rolling bearings doesnt exceed 70 C. If exceeds the specified temperature, it must stop and immediately check and troubleshoot. 2. Check whether the lubrication system is normal. Whether there is a crash of a gear oil pump. Observe the value of the oil pressure gauge and check whether the lubrication system in the fuel tank leaks oil. If find the above various conditions are abnormal, dealt with they in a timely manner. The place of movable jaw suspension bearing and the elbow, it should lubricate regularly which automatic or manual oil pump lubrication. 3. Check whether the oil contains metal powder and other contaminants. If there is dirt, stop the bearing and other parts to check. 4. Check whether there are loose joints between the bolts and flywheel keys of each part. 5. Check the wear of the gear plate and transmission components, and whether the lever spring is normal. 6. Always keep the equipment clean, so that there is no dust, no oil, no oil leakage, no water leakage, no leakage, no leakage. Especially pay attention to prevent dust from entering the lubrication system and lubrication parts. 7. Clean the filter cooler regularly, and wait until it is completely dried before washing. 8. Regularly change the lubricating oil in the fuel tank. Usually once every six months.

The impact crusher crushing the soft and very hard materials, even if there is moisture in the material. The types of stone crushers are widely used in building materials, ore crushing, railways, highways, energy, transportation, energy, cement, mining, chemical and other industries for medium and fine materials.

1. The jaw crushers run smoothly. When the vibration quantity of the machine suddenly increases, it should stop immediately to find out the cause. 2. Under normal conditions, the temperature rise of the bearing should not exceed 35, and the maximum temperature should not exceed 70 . If it exceeds 70, stop immediately and find out the cause. 3. When the plate hammer wear reaches the limit mark, it should be turned around or replaced in time. 4. After assembling or replacing the hammer, it must maintain the rotor balance, and the static balance should not exceed 0.25kg.m. 5. When the rack lining wear, replace it in time which can avoid wearing the casing. 6. Check the tightening status of all bolts before starting each time.

1. Always pay attention to and timely lubrication of the friction surface. 2. The lubricating oil used in the impact crusher should be determined according to the location of the crusher machine, temperature, and other conditions.

Cone crusher is an advanced hydraulic crusher with high power, large crushing ratio, and high productivity. Generally, it uses as a secondary crusher to break medium-hard materials, and use as fine crushers in artificial sand making process plants and quarry plant. Cone Crusher is a hydraulic crushing machine suitable for use in raw materials in the metallurgical, construction, road construction, chemical, and silicate industries. Types of cone stone crushers: GP cone crusher namely single-cylinder hydraulic cone crusher, HP cone crusher namely multi-cylinder hydraulic cone crusher, Compound cone crusher.

1. There must be a de-ironing device to prevent the crushing chamber from passing through the iron. If the iron is frequently over-exposed, it may cause a shaft breakage accident. 2. To be fully loaded, otherwise, the product size will be too thick. 3. The crushing ratio in the production line should be reasonable, so as to maximize the efficiency of the crusher. 4. The spring pressure should not be too tight. If the pressure is too high, the shaft breakage will occur. If the pressure is too small, the spring will jump frequently which affecting the normal operation of the crusher. The product size will become thicker. 5. The temperature of the lubricating oil should not be too high or too low. Otherwise, it will affect the operation of the machine. 6. A lubricating oil should be replaced frequently. Not too dirty. If it is too dirty, it will accelerate the wear of gears, bowl-shaped tiles, bushings, etc., and even make the bushings die. 7. The drive belt installation should not be too tight. Otherwise, it will cause the driveshaft to rotate inflexible or broken. It should not be too loose, otherwise, it will cause the crusher to suffocate. 8. The feeding material should not be too wet and too sticky, the fine particles should not be too much, and it should not be too big. Otherwise, it will cause boring.

Hammer crusher is a high-speed rotary crushing machine. The crusher is suitable for crushing medium hardness materials in industrial sectors such as cement, chemical, electric power, and metallurgy. The medium hardness materials such as limestone, slag, coke, coal and other materials in the medium and fine crushing operations. The hammer mill rock crusher can be used not only for crushing plant, sand making plant, it also can replace cone crushers in mining plant. The types of stone hammers crushers: single-stage hammer crusher, high-efficiency hammer crusher, sand making machine, vertical shaft hammer rock crusher, reversible hammer crusher, double rotor hammer crusher, ring hammer crusher.

1. It should contact the upper and lower procedures related to the machine before starting to stop. And perform the correct operation in the order of opening and stopping. 2. To start the empty machine and should empty the material in the crushing chamber and then stop. 3. Always check all the anchor bolts and lining bolts of the equipment for looseness. If loose, tighten them in time. 4. Check the use of easy-to-wear and easy-to-wear parts such as hammerheads and linings. If we find the problems, they should be disposed of in time. 5. Look at the lubrication and keep the lubrication system in good condition. 6. Keep the feed even and take care not to feed metal debris. 7. Pay attention to check whether the discharge granularity meets the quality requirements. If it does not meet, replace the purlin or adjust the height of the purlin bracket.

VSI crusher is a kind of sand making machine which uses in sand plant and quarry plant. The VSI sand making machine is a hydraulically impact sand making machine that is 50% more energy-efficient than conventional machines. It can make all kinds of rocks, sandstones and river pebbles with construction sand of various grain sizes. The uniformity of sand and high compressive strength.

Firstly, the inspection of sand making equipment before starting. Check whether the machine cavity inspection door is closed. If no close, close it to prevent the material from flying out and posing a danger to the staff. And the lubricating oil of the equipment should also be inspected.

Thirdly, the starting sequence of the VSI series crushers must be correct. It is generally installed in the following order: vibrating feeder jaw crusher sand making machine vibrating screen sand washing machine. In the event of a shutdown, you need to operate in reverse order.

Finally, it is necessary to ensure the normal feed rate and volume of the equipment during the production process. We must strictly follow the feed size required by the equipment. Forbidding to enter metal materials and large stones to prevent damage to the parts of the equipment. If we find severe vibration or loud noise during the production process, stop and inspect in time for timely treatment.

Jiangxi Shicheng stone crusher manufacturer is a new and high-tech factory specialized in R&D and manufacturing crushing lines, beneficial equipment,sand-making machinery and grinding plants. Read More

stationary crushing plant - aimix crusher & screening plant for sale

stationary crushing plant - aimix crusher & screening plant for sale

Crusher Plant Types: stationary crushing plant; mobile crushing plant Crusher Machine Types: jaw crusher cone crusher Impact crusher Raw Materials Applied: 1. Non-metallic mineral: limestone, river stone, marble, quartz, granite, basalt, etc., 2. Metal ore: iron ore, gold ore, copper ore, aluminum ore, manganese ore, lead and zinc ore, etc. 3. Construction waste Get A Free Quote

Crushing plant is also called crushing and screening plant, it includes sand and gravel production line, stone production line, silicon sand production line, construction aggregate production line. Our stone crusher plant are engineered to deliver unrivaled productivity in mines, quarries and civil engineering projects. We offer advanced, proven crushing and screening equipment for any size-reduction challenge. Whether youre producing several sized aggregates or crushing tons of hard rock ore, our solutions deliver the robustness and versatility you need.

Furthermore, it has been proven by many practices that the crusher plant is also particularly suitable for processing construction waste, and will lead the process of recycling construction waste in the future.

The crushing is generally divided into three steps: 1. The first step of crushing: the input size 1500 500mm, the output size 400 125mm 2. The second step of crushing: the input size 400 125mm, the output size 100 50mm 3. The third step of crushing: the input size 100 50mm, the output size 25 5mm.

We have the concept of ecological environmental protection, we promote the use of new technologies for noise reduction, dust reduction and wastewater treatment. We research and develop technologies and products for the comprehensive use of waste, and we develop a circular economy.

Aimix crushing plant mainly include statioanry crushing plant and mobile crushing plant. stationary crushing plant includes Jaw Crusher, Cone Crusher, Impact Crusher, Sand Production Line or VSI Crusher, Feeders, Screening machine and Washers, etc.

Features of Aimix Jaw Crusher: High crushing ratio, large production capacity, good shape of end products, with simple structure, reliable operation, convenient maintenance and low operating cost; Advantages of Aimix Jaw Crusher: 1. The discharge mode adjusting device with joint mode, is reliable and convenient. The adjustment range is large, which increases the flexibility of the equipment and can meet the needs of different customers. 2. The lubrication system is safe and reliable, the parts are easy to replace and the maintenance work is convenient.

Spring system for overload protection, no damage to the machine. Adopted grease seal to isolate dust and lubricants, ensure reliable operation. Standard type, medium type and short head type to choose.

Features of Aimix Cone Crushers: high quality material, reasonable structure design and regular crushed product sizes. It has features of reliable structure, high productivity, convenient fit and economical use.

Advantages of Aimix Cone Crushers: 1. reliable structure and low cost operation 2. laminated crushing shape, excellent shape of end products; 3. Its spring safety device acts as an overload protection, when iron or other strange tidal flow passes the crushing chamber, no damage will be caused to the crusher; 4. The glycerin seal is used, which isolate the dust from the lubricating oil, which guarantees reliable operation.

Attention: Hard materials can not be crushed, such as basalt, granite, river stone, etc. Normally impact crusher is used for crushing of materials that are not very hard say soft material and materials that are non-abrasive. For example limestone, coal, gypsum, seeds etc. Production capacity: 30-800 t/h; Maximum input size: 800mm; Applied in secondary or tertiary stage of crushing

Features of Aimix Impact Crusher: 1. The hammer, the impact plate and the protective plate are made of new wear-resistant materials, which are resistant to impact and wear. 2. The shape of the final products are good. With easy adjustment between the impact plate and the hammer, an effective control of the output size. 3. With reasonable hammer structure, it has the characteristics of fast dismantling and multiple transposition, which can considerably shorten the time to replace the hammer.

VSI crusher is a machine that produces high efficiency sands, which is developed after several technical improvements, based on the introduction of advanced German technology. It is the Preferred option in the field of the manufacture of artificial sands and the modeling of aggregates.

Advantages of Aimix Impact Crusher: 1. The hammer, the impact plate and the protective plate are made of new wear-resistant materials, which are resistant to impact and wear. 2. The shape of the final products are good. With easy adjustment between the impact plate and the hammer, an effective control of the output size. 3. With reasonable hammer structure, it has the characteristics of fast dismantling and multiple transposition, which can considerably shorten the time to replace the hammer.

Contact Us Now! Interested in our products? Please give your inquiry in the form below. We will reply you in 6 hours. Productivity(t/h): undecided0-50 t50-100 t100-300 t300-500 t500 t+ * Your Name: *Your Email: *Phone Number: Your Country: * Your Requirement

crushers - all crusher types for your reduction needs - metso outotec

crushers - all crusher types for your reduction needs - metso outotec

All rock crushers can be classified as falling into two main groups. Compressive crushers that press the material until it breaks, and impact crushers using the principle of quick impacts to crush the material. Jaw crushers, gyratory crushers, and cone operate according to the compression principle. Impact crushers, in turn, utilize the impact principle.

As the name suggest, jaw crushers reduce rock and other materials between a fixed and a moving jaw. The moving jaw is mounted on a pitman that has a reciprocating motion, and the fixed jaw stays put. When the material runs between the two jaws, the jaws compress larger boulders into smaller pieces.

There are two basic types of jaw crushers: single toggle and double toggle. In the single toggle jaw crusher, an eccentric shaft is on the top of the crusher. Shaft rotation causes, along with the toggle plate, a compressive action.

The chewing movement, which causes compression at both material intake and discharge, gives the single toggle jaw better capacity, compared to a double toggle jaw of similar size. Metsos jaw crushers are all single toggle.

Gyratory crushers have an oscillating shaft. The material is reduced in a crushing cavity, between an external fixed element (bowl liner) and an internal moving element (mantle) mounted on the oscillating shaft assembly.

The fragmentation of the material results from the continuous compression that takes place between the liners around the chamber. An additional crushing effect occurs between the compressed particles, resulting in less wear of the liners.

Cone crushers resemble gyratory crushers from technological standpoint, but unlike gyratory crushers, cone crushers are popular in secondary, tertiary, and quaternary crushing stages. Sometimes, however, the grain size of the processed material is small enough by nature and the traditional primary crushing stage is not needed. In these cases, also cone crushers can carry out the first stage of the crushing process.

Cone crushers have an oscillating shaft, and the material is crushed in a crushing cavity, between an external fixed element (bowl liner) and an internal moving element (mantle) mounted on the oscillating shaft assembly.

An eccentric shaft rotated by a gear and pinion produces the oscillating movement of the main shaft. The eccentricity causes the cone head to oscillate between open side setting and closed side setting discharge opening.

The fragmentation of the material results from the continuous compression that takes place between the liners around the chamber. An additional crushing effect occurs between the compressed particles, resulting in less wear of the liners. This is called interparticular crushing also.

Depending on cone crusher, setting can be adjusted in two ways. The first way is for setting adjustment to be done by rotating the bowl against the threads so that the vertical position of the outer wear part (concave) is changed. One advantage of this adjustment type is that liners wear more evenly.

To optimize operating costs and improve the product shape it is recommended that cone crushers are always be choke fed, meaning that the cavity should be as full of rock material as possible. This can be easily achieved by using a stockpile or a silo to regulate the inevitable fluctuation of feed material flow. Level monitoring devices detect the maximum and minimum levels of the material, starting and stopping the feed of material to the crusher, as needed.

Impact crushers are traditionally classified to two main types: horizontal shaft impact (HSI) crushers and vertical shaft impact (VSI) crushers. These different types of impact crushers share the crushing principle, impact, to reduce the material to smaller sizes, but features, capacities and optimal applications are far from each other.

Horizontal shaft impact (HSI) crushers are used in primary, secondary or tertiary crushing stage. HSI crushers reduce the feed material by highly intensive impacts originating in the quick rotational movement of hammers or bars fixed to the rotor. The particles produced are then further fragmentated inside the crusher as they collide against crusher chamber and each other, producing a finer, better-shaped product.

VSI crusher can be considered a stone pump that operates like a centrifugal pump. The material is fed through the center of the rotor, where it is accelerated to high speed before being discharged through openings in the rotor periphery. The material is crushed as it hits of the outer body at high speed and due to rocks colliding against each other.

Selecting optimal crushing equipment can be difficult. Luckily there are tools and software available that simplify weighting different options and help in making decisions. The backbone of all these analyzes are careful calculations that take into account the capabilities and constraints of different crushers and operational requirements.

Every crushing site and operation is different, and theoptimal results are normally obtained by combining theoretical conclusions with practical experience of different materials, operational conditions, maintenance needs, and economic aspects of various alternatives.

Below are some key issues listed according to crushing stages in brief. While defining the best technical solution for your requirements, its good to remember that many crushers are available not only as stationary but also asmobileorportableversions in case you prefer to move or transport your crusher at the production site or between sites regularly.

If you are interested in more detailed analyzes tailored just for your crushing operations, please contact Metso experts. We have practical experience of thousands of different crushing applications around the world, and we are happy to help in finding the equipment that best fits your needs.

The main purpose of a primary crusher is to reduce the material to a size that allows its transportation on a conveyor belt. In most crushing installations a jaw crusher takes care of primary crushing. Plants with very high capacities that are common in mining and less popular in aggregates production, normally use a primary gyratory crusher. When the processed material is easy to crush and not very abrasive, an impact crusher may be the best choice for primary crushing.

One of the most important characteristics of a primary crusher is its capacity for accepting feed material without bridging. A large primary crusher is, naturally, more expensive than a smaller one. Therefore, the investment cost calculations for primary crushers are compared together against the total costs of primary stages, including quarry face clearing, blasting, and drilling costs. In many cases, dump trucks transport the rock to a stationary primary crusher. This may be an expensive solution. Amortization, fuel, tires, and maintenance costs can be included when the vehicles are in high demand. In modern aggregates operations, the use of mobile primary crushers that can move alongside the rock face is, in many cases, the most economical solution.

In terms of the size of the feed opening, the client gets a better return on investment when the primary crusher is a jaw crusher. That means less drilling and blasting because the crusher accepts larger boulders. The disadvantage of this type of crusher, when high capacity is required, is the relatively small discharge width, limiting the capacity as compared with the discharge circuit of a gyratory crusher. Jaw crushers are mainly used in plants producing up to approximately 1600 t/h.

The primary gyratory crusher offers high capacity thanks to its generously dimensioned circular discharge opening (which provides a much larger area than that of the jaw crusher) and the continuous operation principle (while the reciprocating motion of the jaw crusher produces a batch crushing action). The gyratory crusher has no rival in large plants with capacities starting from 1200 t/h and above. To have a feed opening corresponding to that of a jaw crusher, the primary gyratory crusher must be much taller and heavier. Also, primary gyratories require quite a massive foundation.

The primary impact crusher offers high capacity and is designed to accept large feed sizes. The primary impact crushers are used to process from 200 t/h up to 1900 t/h and feed sizes of up to 1830 mm (71") in the largest model. Primary impact crushers are generally used in nonabrasive applications and where the production of fines is not a problem. Of all primary crushers, the impactor is the crusher that gives the best cubical product.

If the intermediate crushing is done with the purpose of producing railway ballast, the quality of the product is important. In other cases, there normally are no quality requirements, except that the product be suitable for fine crushing.

Due to their design, cone crushers are generally a more expensive investment than impactors are. However, when correctly used, a cone crusher offers lower operating costs than a conventional impact crusher. Therefore, clients crushing hard or abrasive materials are advised to install cone crushers for the final crushing and cubicising stage.

Cone crushers can in most cases also give a good cubic shape to fine grades. They can be adapted to different applications. This is an important factor, as client-specific needs often change during a crushers lifetime.

The conventional type has horizontal shaft configuration, known as HSI. The other type consists of a centrifugal crusher with vertical shaft, generally known as VSI. Impactor operation is based on the principle of rapid transfer of impact energy to the rock material. Impactors produce cubic products, and they can offer high reduction ratios as long as the feed material is not too fine. This means that in certain cases it is possible to use a single impact crusher to carry out a task normally done in several crushing stages using compressing crushers (i.e., jaw, gyratory, and/or cone crushers). Impactors are mostly used for nonabrasive materials.

Conventional horizontal-shaft impact crushers are available in various sizes and models, from high-capacity primary crushers for large limestone quarries to specially designed machines for the crushing of materials such as slag.

There are two main categories of VSI crushers machines with impact wear parts around the body and machines that use a layer of accumulated material. The first type is in many respects similar to the conventional impactor with horizontal shaft and rotor. The second type became quite popular in the past decade and is known as the Barmac crusher. The difference between a conventional impactor and a VSI of the Barmac type is that the latter offers lower operating costs, but its reduction ratio is lower also. In a Barmac VSI, the material undergoes an intense rock-on-rock crushing process. In the other crushers, most of the reduction is done by the impact of stone against metal.

Customers operating old, rebuilt, or expanded plants often have problems with the shape of the product. In these cases, the addition of a Barmac VSI in the final crushing stage offers a solution to product shape problems.

The same applies to many mobile crushing units. As the number of crushing stages is normally small with this type of plant, it is almost impossible to obtain a good product shape unless the rock is relatively soft and thus more suited for the production of cubic product. A centrifugal crusher in the final stage can help to solve the problem.

Get the maximum potential out of your size reduction process to achieve improved crushing performance and lower cost per ton. By using our unique simulation software, our Chamber Optimization experts can design an optimized crushing chamber that matches the exact conditions under which you operate.

land clearing: forestry mulcher, forestry tiller, stone crusher | fae group

land clearing: forestry mulcher, forestry tiller, stone crusher | fae group

The FAE Land Clearing line is designed and built to speed up and facilitate any type ofagricultural/forestry work.Designed to last over time, FAE agricultural and forestry machinery, whether it is aforestrymulcher, a forestry tiller, a stone crusher, a stump cutteror a multifunction head,allow industry professionals to perform any reclamation work and land preparation, being certain of thequality of the results. Efficiency and performance are high for both the PTO Driven heads which are easily applied to different power tractors,for the PT SERIES, and for the Hydraulic Driven heads, intended for skid steers, excavators, and special vehicles.

FAE PTO Driven Heads guarantee excellent results in any situation, whether it is a forestry mulcher for tractor, a tractor tiller, a stump cutter, a stone crusher or a multifunction head. Easily hitched to the tractor, they are outstanding at performing shredding and chopping processes thanks to FAE technology.

When special vehicles such as excavators, skid steers or tracked vehicles are used for road work, the solution is a forestry mulcher, a stump cutter or a a stone crusher that uses the hydraulic system of the machines to move the rotor.

The tracked carriers of the PT Series come equipped with a Cummins, John Deere or CAT engine from 160 to 600 HP. Depending on which FAEhead is used, the PrimeTech prime movers efficiently perform land clearing work, land reclamation, road construction, stone and rock crushing,as well as asphalt grinding. The PT Series will perform heavy-duty applications in the most demanding environments.

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