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double roll crushers oils sand

double roll crusher|double roller crusher|double roll sand maker_xingyang ju xin machinery co., ltd

double roll crusher|double roller crusher|double roll sand maker_xingyang ju xin machinery co., ltd

Xingyang Ju Xin Machinery Co., Ltd. is a machines factory specialized in mining and metallurgy equipment,such as cement production plant, active lime production plant,ceramic sand plant,sand and gravel production plant,etc.

opp-dry: materials handling facilities | oil sands magazine

opp-dry: materials handling facilities | oil sands magazine

The dry side of an Ore Preparation Plant breaks down chunks of mined ore, removes oversized debris and provides critical storage for the processing plant. Learn more about OPP-Dry facilities in the oil sands.

The dry-side of Ore Preparation (often referred to as OPP-Dry) is where oil sands is first received from the mine and prepared for slurrying. OPP-Dry involves breaking down the mined ore, removing any oversized material and storing at least 30 minutes of feedstock in case of a supply disruption from the mine.

One of the biggest costs for any oil sands mine operator is the number of haul trucks needed to supply oil sands to the processing plant.Location and layout is a very critical factor when designing OPPs, particularly the dry side.The bulk handling plant is normally built closer to the mine pit, often a considerable distance away from the processing plant.Crushing plants are typically installed at a lower elevation, or in-pit,to help minimize elevation changes and reduce diesel consumption for the haul trucks. Conveyors are then used to transport the oil sands to the Slurry Preparation Plant (or OPP-Wet).

When mined oil sands is first hauled to OPP, the trucks dump their payload into large hoppers. Apron feeders installed underneath the hopper feed a steady stream of oil sands to the crushers (or sizers) which break down any large chunks. Conveyors installed underneath the crushers transport the loose oil sands to the downstream storage pile or surge bin.

The hopper, apron feeder and crusher is often located in one single structure, tucked into a retaining wall inside the crusher pit. The main feed conveyor is located underneath the entire structure. ThyssenKrupp is by far the most common supplier of primary crusher installations in the oil sands. The latest generation of these semi-mobile crushing plants are delivered to site in large modules and are designed to be disassembled and relocated,if required.

A retaining wall is built to house the crushing plant and conveyors located below the crushers or sizers.The conveyors transport the ore up and out of the crushing pit. Conveyors are an efficient and cost effective method of transporting the ore from a lower to a higher elevation.

Traditionally, retaining walls were built out of precast concrete slabs. Since the crushers are relocated periodically, the retaining wall need not be a permanent structure. Wire mesh facing on top of backfill material is therefore becoming more common for newer constructions, providing a cheaper and lighter alternative to concrete, which can be very expensive and hard to source in northern Alberta. Sand, gravel and lean oil-sands are commonly used backfill material, which must have adequate structural stability. These walls are known as MSE (mechanically stabilized earth) walls.

For structures that do not require a long life, layers of geotextile fabric can also be used to retain the backfill material. This fabric is then covered with a heavy-gauge wire grid. If something more permanent or longer lasting is required, gabion-type rock lining is used underneath the steel mesh.

As the loaded haul trucks drive from the mine up to the top of the crushing plant, the driver reverses and backs-in towards the dump hopper.A concrete curb or barrier lets the driver know how far back to reverse. This prevents the massive truck from damaging the edge of the dump hopper. Most OPP facilities use traffic light signals to let the driver know when it's safe to dump and which side of the hopper to use (for 2-sided hopper). Radars are used to measure the operating level of the hopper. When the hopper is full, a red stop light alerts the driver to wait for an all-clear signal.Once the hopper empties, the traffic light turns green, giving the driver an all-clear to safely dump the oil sands. Cameras are also typically installed at the truck dump site, relaying the video feed to the main control room.

Hoppers are normally constructed of steel and are typically lined with wear-plates to reduce wear and tear. Some hoppers are also equipped with electric heaters which prevents the oil sands from sticking to the inside of the steel bin.

Most hoppers are designed to accommodate two mining trucks dumping at the same time. These diamond-shaped double-dump hoppers are normally sized to hold about 1,000 tonnes of oil sands.Single-dump hoppers are still commonly found in older mining facilities and have a considerably smaller holding capacity.

Tractor-type apron feeders are commonly used in the mining industry.The top of the feeder is normally covered with ribbed steel beams or plates.Two parallel sets of rollers and chains slowly pull the steel plates towards the discharge chute (or inlet) of the crusher.Since apron feeders are installed beneath the dump hopper, they must be designed to take a significant amount of impact from the falling chunks of ore. The travel speed of the apron feeder is normally adjustable and can speed up or slow down depending on the level of oil sands in the hopper or surge bin. This helps prevents overloading of the crusher.

Apron feeders are typically a few meters wide and installed at an angle, feeding up into the crusher. A dribble-belt or spillage conveyor is installed underneath the apron feeder to catch all the oil sands that sticks to the metal plates and falls from the bottom (return) side of the apron feeder. The dribble conveyor collects the spilled oil sands and feeds it back into the crusher.

A double-roll crusher works by compressing the mined oil sands between two rotating rollers, which are equipped with wear-resistant teeth.As the rollers rotate towards each other, they compress the ore, breaking down any large chunks of ice or debris. The crushed oil sands is pulled down by the rollers and falls onto the conveyor belt located underneath the crusher.

The space between the rollers is adjustable and sets the maximum top size of material feeding into the wet side of the OPP plant. The normal distance between the rollers is 400 to 600 mm (or 16 to 24 inches). The rollers are driven by very large and powerful motors, normally 1000 to 2000 hp in size.Crushers used in the oil sands are designed to take large chunks of ice, up to several meters long.The rollers are also normally equipped with hydraulic cylinders that enable some "float" or kick-back during jams.This prevents the crusher from overloading when a large piece of unbreakable debris or ice comes through the crushing plant.

The speed of the rollers can also be adjusted. If more throughput is required, the rollers can be sped up and process more material at a faster rate. In newer installations, radars installed on the top of the crusher feed chute will signal the rollers to speed up when the feed chute fills up and slow down as the chute empties.However, faster operation of the crusher puts more stress on the motor and increases the wear rate of the crusher teeth.

The roller teeth are covered with wear-resistant caps.These caps wear down and are periodically replaced. Both the feed and discharge chutes are normally covered in wear-resistant plates to minimize erosion. As in the case of the main dump hopper, many crusher chutes have electric heating elements to prevent the oil sands from sticking.

Although crusher capacities can vary between the operators, most crushers have a nominal (steady-state)capacity of between 8,000 to 10,000 tonnes per hour. The largest crushers used in the oil sands have a peak processing capacity of 15,000 tonnes per hour.

In conventional mining, double-roll crushers are sometimes referred to as "mineral sizers"since they reduce the size of the largest chunks without pulverizing the smaller particles. These types of crushers or sizers are commonly used in reducing the top-size of soft or sticky material, such as limestone or lignite (brown coal).

Most of the Suncor material handling plants use sizers manufactured by MMD Sizer. Most other oil sands operators use double-rolls crushers supplied by ThyssenKrupp.Although the equipment may have different names, their design and operation is very similar.In fact, the two terms (double-roll crusher and mineral sizer) are used interchangeably in the oil sands industry.

The "crushed" or loose oil sands material is transported to a storage pile or surge bin using a heavy-duty conveyor, which is positioned underneath the crusher.An impact beam is normally located directly below the crusher chute discharge. This beam minimizes the impact of the ore falling onto the conveyor and also helps distribute the oil sands more evenly cross the conveyor belt.

A number of drive stations are located along the length of the conveyor. These drive stations control the speed and tension of the belt. Motorized drive pulleys pull the belt. Idlers (non-motorized pulleys) are positioned along the length of the belt and serve to keep the belt in alignment. Pulley-cleaners are installed on the back of each pulley to clean-off the sticky oil sands.

Conveyor belts are normally constructed of layers of steel, fabric and vulcanized rubber. A mixture of glycol and water is sprayed onto the underside (or return side) of the belt. This belt-wetting system prevents the oil sands from sticking to the conveyor belt.

Conveyor belts are commonly equipped with weightometers that estimate the weight of oil sands being fed to the plant. Conveyor weightometer readings are compared to weightometers installed on the haul trucks in order to calculate the amount of oil sands delivered from the mine. Operators must keep close measurement of the amount of oil sands mined and must periodically report their production numbers to the Alberta Energy Regulator.

Oil sands conveyor belts are equipped with numerous safety system which are designed to protect the belt and any personnel working in the area. Since the belts can be several kilometres long, a minor misalignment can lead to serious equipment damage. Instruments installed along the length of the belt will alert OPP operators to any misalignment or "side travelling". Rip detectors will alert of any potential tears in the belt.Metal detectors are commonly installed at the front end of the conveyor belt, warning of any large pieces of metal in the oil sands (typically wear plates or crusher teeth caps that may have come loose during ore handling). Some facilities will also use diverter gates to remove any significantly oversized metal objects.

A trip cord is positioned along the length of the conveyor. In the event someone or something accidentally gets caught in the belt, pulling the trip cord will instantly stop the belt. The accidental catching of loose clothing within conveyor belts is a major cause of injuries in the mining industry.

Oil sands storage is an important component of any mining facility. Although mining is a 24/7 operation, it is a batch process. In a typical operation,each loaded haul truck dumps a 400 tonne load into the crusher hopper, then drives away empty.Another truck moves in a minute later, dumping another 400 tonnes. On a good day, the cycle repeats throughout the day, with little interruption. However, interruptions are quite common. There can be several minutes, if not hours, when the crusher receives no feed, for example:

As with any process, steady operation is key to maintaining good operating efficiency. Feed outages to the main plant can be very disruptive to the process. The storage pile or surge pile normally provides up to an hour of oil sands, enabling the Bitumen Production plant to continue operating normally.

The oil sands is transported from the crushing plant using the main feed conveyor, which dumps the ore into a heap or pile. Apron feeders are installed in a tunnel below the stockpile, running down the centre directly below the outlet of the feed conveyor. Bulldozers are used to push the oil sands from the outer edge of the pile into the centre, ensuring none of the ore is wasted.

Stockpiles obviously require the least amount of capital to construct but do require constant "grooming" since an operator is required to move the material from the edge to the centre of the stockpile so it can be reclaimed by the apron feeders below. Another drawback of the stockpile is a larger footprint over traditional bin design since the oil sands tends to spread out over a large surface area. Stockpiles are more commonly found at older OPP installations.

Storage silo technology is borrowed from the conventional mining and the agricultural industry. Much like a bulk storage bin, silos have an angled bottom which helps prevent the formation of any dead-spots in the bottom corners and ensures the oil sands smoothly flows onto apron feeders installed below.

Muskeg River is currently the only operation to use an oil sands storage silo. The open-top concrete structure is 35 meters in diameter,45 meters tall and can holds several hours worth of oil sands feed. A single feed conveyor transports the oil sands from the crushing plant, discharging into to the top of the silo.

Three apron feeders located underneath the silo feed three independent slurry preparation trains. Each apron feeder pulls the oil sands out of the bottom of the silo, dumping onto a slurry feed conveyor. Each conveyor transports the oil sands to a rotary breaker located in the Slurry Preparation Plant.

The main drawback of the storage silo is cost of construction. Since the silo is made of concrete, the structure is considerably more expensive than a steel bin. Silos are also permanent structures and cannot be relocated.

Surge bins have become the standard for oil sands storage within OPP facilities. The large steel bins normally hold about 30 to 45 minutes worth of oil sands feed.Surge bins always have a conical or angled bottom to ensure the oil sands smoothly flows to the centre and no "dead spots" occur in the bottom of the bin.

Surge bins can have one or two compartments, or hoppers. An apron feeder is positioned underneath each compartment and supplies oil sands to the Slurry Preparation Plant. Double-hopper surge bins are commonly used in newer installations. These bins are equipped with two outlets and two apron-feeders, which can feed two independent slurry preparation trains. Some operators have bins with 4 separate hoppers and 4 apron feeders.

Bridging is a common problem in surge bins, which occurs when the oil sands sticks to walls on the bottom section of the bin. Bridging causes air pockets and results in uneven flow of material onto the apron feeder. Many newer surge bins used in the oil sands are equipped with air injection and heating elements on the lower half of the bin to prevent the oil sands from sticking to the metal plates and keep material smoothly flowing to the outlet.

Surge bins can be found throughout Syncrudes mining operations, the Horizon and Kearl Oil Sands Mines, and at the Jackpine Mine Expansion plant. ThyssenKrupp is the supplier of choice for Syncrude, Imperial Oil, Shell and Canadian Natural Resources. The new Fort Hills Mine uses a FAM surge bin installation.

Regardless of the type of storage system used (either the stockpile, silo or surge bin), oil sands feeds onto conveyors through apron feeders installed underneath the silo/bin/pile. Depending on the number of Slurry Preparation trains located downstream, there could be one, two or three apron feeders located underneath each piece of storage equipment.

Oil sands is transported to the Slurry Preparation Plant (SPP or OPP-Wet) using conveyors. The number of conveyors correspond to the number of SPP trains. Hot or warm water is added to the oil sands in the SPP area, removing any oversized material and producing a pumpable slurry that can be gravity separated in Extraction.

double roller crusher - jxsc machine

double roller crusher - jxsc machine

Capacity2-140 T/H Fedding size150mm Discharge size2-50m Crushing MaterialRiver pebble, granite, basalt, iron ore, limestone, quartz, gangue and so on. ApplicationSuitable for crushing brittle bulk materials in cement, chemical, electric power, mining, metallurgy, building materials, refractory materials, coal mines, etc.

Whats the double roller crusher The Doule Roller Crusher, also known as roll crusher, toothed roll crusher, is suitable for fine crush the medium hardness rock with compressive strength 160MPa, such as ore, rock, coke, coal, clinker, ceramic raw materials, slag, refractory materials, and chemical materials. According to the number of rolls, the roll crushers can be divided into single roll crusher, double roll crusher or, four roll crusher. Double roll crusher is the most used type. We produce industrial roller crushers and laboratory uses small roll crusher. Advantages Replacement wear-resistant lining, long service life, convenient maintenance. Compact structure, lightweight, small size, for the same production capacity requirements of the crushing system, equipped with roller crusher can significantly save investment. The width of the discharge opening can be adjusted to determine the crushed material size. High reduction ratio, low vibration, dust removal, and less noise. High efficiency, low consumption, uniform granule, good granule shape. Roller crusher manufacturer JXSC, a Chinese rock crusher manufacturer, supply roll crushers global, we establish a wear parts supply system to meet customers parts replacement needs are met and reduce the downtime. Factory price, fast delivery, one year warranty, on-site installation, support roll crusher design.

Main partsBearing box, roll shell, bearing housing, adjusting rod, motor, carrier, fixed roller, movable roller and safety spring, etc. Working Principle of Double Roller CrusherThe roller of the roller crusher is supported by the spring pressure. Under normal working conditions, the spring force is sufficient to overcome the crushing force of the crushed material. By changing the number of spacers between the frame and the movable bearing, the width of the discharge port between the two rolls can be adjusted to adjust the grain size. When there is a material that cannot be broken into the crushing chamber, the spring is compressed, and the movable roller is retracted to increase the discharge opening. After the material is discharged, the movable roller is reset under the spring pressure. OperationThe main wearing part of the roller crusher is the crushing roller. Precautions as follows: Iron removal before crushing; prevent sticky mud clogging; pre-pick out the large ore rock; good lubrication condition.

double roll crusher | henan deya machinery co., ltd

double roll crusher | henan deya machinery co., ltd

Roll crushers, or crushing rolls, or double roller crushers, are still used in some mills, although they have been replaced in most installations by cone crushers. They still have a useful application in handling friable, sticky, frozen, and less abrasive feeds, such as limestone, coal, chalk, gypsum, phosphate, and soft iron ores.

The mode of operation of roll crushers is extremely simple, the standard spring rolls consisting of two horizontal cylinders which revolve towards each other. The set is determined by shims which cause the spring-loaded roll to be held back from the solidly mounted roll.

Smooth-surfaced rolls are usually used for fine crushing, whereas coarse crushing is often performed in rolls having corrugated surfaces, or with stub teeth arranged to present a chequered surface pattern. Sledging or slugger rolls have a series of intermeshing teeth, or slugs, protruding from the roll surfaces. These dig into the rock so that the action is a combination of compression and ripping, and large pieces in relation to the roll diameter can be handled. Their main application is in the coarse crushing of soft or sticky iron ores, friable limestone, coal, etc., rolls of 1 m diameter being used to crush material of top size 400 mm.

Wear on the roll surfaces is very high and they often have a manganese steel roll, which can be replaced when they are worn out. The feed must be spread uniformly over the whole width of the rolls in order to give even wear. One simple method is to use a flat feed belt of the same width as the rolls. Since there is no provision for the swelling of broken ore in the crushing chamber, roll crushers must be starvation fed if they are to be prevented from choking. Although the floating roll should only yield to an uncrushable body, choked crushing causes so much pressure that the springs are continually on the work during crushing, and some oversize escapes. Rolls should therefore be used in closed circuit with screens. Choked crushing also causes interparticle comminution, which leads to the production of material finer than the set of the crusher.

There are two types of roller crusher, smooth roller and tooth roller. Smooth roller crusher crushes materials mainly by extrusion of two rollers, meanwhile also has function of grinding, it is good for medium and fine crushing of medium hardness materials. While tooth crusher crushes material mainly by chopping, also has function of grinding, good for coarse and medium crushing of fragile and soft rocks.

Double roller crusher model is named by roller diameter and length, for example model 2PG0640, 2 means two roller, P stands for crusher, G stands for smooth roller, 06 stands for roller diameter 600mm, 40 stands for roller length 400mm. Similarly, 2PGC500x750, C stands for tooth roller.

double roller crusher | henan deya machinery co., ltd

double roller crusher | henan deya machinery co., ltd

Double roll crusher is reliable in operation, simple in maintenance, low in running cost, and discharge size can be adjusted. It is widely used in the processing of brittle materials and tough materials in cement, metallurgy, chemical industry, electric power and coal industries. Can be made four-roll crusher according to customer requirement.(via wikipedia).

roller crusher | single/double roll crushers - jsxc mine

roller crusher | single/double roll crushers - jsxc mine

Roller crusher is a very old crushing equipment that appeared in 1806, and its structure is simple. It can crushers iron ore, Quartz Stone, rock gold, rock tantalum niobium ore, rock tin ore, rock tungsten ore, manganese ore, ilmenite ore, K-albite, limestone, river pebbles, copper ore, bauxite, barite, basalt, etc. Therefore the roll crusher is one of the most widely used crusher machines in the mining industry.

Rock Roll crusher is fine crusher equipment that similar to the hammer crusher. It can crush the compressive strength of less than 160 MPA of materials. Medium feed size, and adjustable discharge size. With the characteristic of low maintenance costs, low requirements for water, reliable performance, less power consumption, less dust, low noise and so on.

Stone roll crusher can be divided into single-roll, double-roll and multi-roll several types according to the number of rollers. According to the shape of the roll surface, have two kinds, smooth roll and tooth roll. The former is suitable for medium and fine crushing of medium hardness ores. While the latter is suitable for coarse and medium crushing of Brittle and soft ores.

The material falls between the two rollers through the feeding opening to squeezing and crushing. Then the finished material falls naturally. In the case of hard or no broken, the role can automatically retreat under the action of hydraulic cylinder or spring. The gap between the roller increase, and the hard or not broken material fall that can protect the machine from damage. The relative rotation of the two rollers have a certain gap, change the gap, you can control the product discharge granularity. Double-roll crusher is the use of a pair of opposite rotation of the Round Roller, four-roll crusher is the use of two pairs of opposite rotation of the Round Roller crushing operations.

3. If the feed material is not uniform along the length of the roller, the roller surface will not only wear quickly but also wear unevenly at every point. The annular groove appears will damage the normal crushing work, the particle size of a crushing product is not uniform. Therefore, in addition to the roller crusher used for coarse crushing, the medium and fine crushing roller crusher is usually equipped with a feeder machine to ensure continuous and uniform feeding. And the length of the feeder is equal to the length of the roller that makes the feed is uniform along the direction of the length of the roller.

4. Reasonable maintenance and proper operation can ensure long-term continuous work, reduce parking time. Only the normal management and daily check the normal working conditions, can prevent failure and ensure continuity of service.

(1) Pay attention to the fastening of the bolts of each component and tighten them immediately if found loose; (2) Before the work must start the crusher, wait for the speed in normal, then feed materials. The procedure is opposite when stopping; (3) Check the outlet regularly and remove the blockage if found; (4) Pay attention to check the wear degree of the wearing parts, at any time pay attention to the replacement of worn parts; (5) No overload and the electrical instruments keep under constant care; (6) The bearing oil should be timely, and do not make the bearing oil leakage; (7) Control the bearing temperature, the temperature rise should not be higher than the surrounding air 25 ~ 30 C; (8) Dust and other materials should be removed from the underframe plane of the movable device to prevent the movable bearing from moving on the underframe when the roller crusher encounters unbreakable materials, which may cause serious accidents.

The roller crusher composes of a roller wheel, roller supporting bearing, pressing and adjusting device and driving device. The crushing roller is the main working mechanism of the crusher, which is composed of shaft, wheel hub and roll cover. The wearing degree of roll top has a great influence on the working efficiency of roll crusher. Only when the roll top is in good condition, the crusher can get higher production capacity. Because of the importance of roller, it is of great significance to understand the factors affecting roller wear and correct repair of roller.

(1) The material is distributed evenly as far as possible to reduce the wear degree of the ring groove, and roller skin on the surface of the roller; (2) In the operation of the crusher, especially in the process of coarse crushing. Attent to the size of the ore blocks, to prevent the ore blocks from being too large. It will make severe vibration of the crusher, thus seriously wearing the roll skin; (3) The selection of roller skin with good wear resistance can reduce the wear degree of roller skin and prolong the service life of Roller; (4) the length of the feeder shall be the same as the length of the rollers to ensure uniform feeding along the length of the rollers. In addition, in order to continuously feed the ore, the speed of the feeder should be 1-3 times faster than the speed of the stick; (5) Often check the size of the broken product and move one of the rollers along the axis for a certain period of time, the distance is about 1 / 3 of the size of the ore.

Double Roll crushers are the most common type of roll crushers. The crusher machine uses two opposite rotating rollers to crush the material. It is composed of an electric motor, support, a fixed roller, a movable roller, a safety spring, etc. With smooth and serrated surfaces. The bearings of the active rollers can move along the frame which supported by strong safety springs. The bearing will remove out and spit out the article if the feed material is very hard. The roll surface has smooth and sawtooth.

Two Roll surface is smooth that mainly play the role of extrusion grinding crushing on the material. This equipment often uses for clay, coal, clinker and limestone and other materials in the fine crushing work. The roller surface with the sawtooth of the two rollers. The machine mainly plays the role of cracking and tearing. The equipment is mainly to complete the bulk crushing of materials. The smooth surface of one roll and the sawtooth of the other roll that mainly to play the role of extrusion, bending and grinding on the material. This type of double-roller crusher mainly uses to crushing clay and coal.

If you know the price of a roller crusher machine. Please contact us, we are the stone crusher manufacturer who sale jaw crusher, cone crushing, impact crusher, crushing and screening equipment, and sand making/washing machine.

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factory price double roll crusher sand making crushing equipment line - mining & construction solutions from henan dewo machinery

factory price double roll crusher sand making crushing equipment line - mining & construction solutions from henan dewo machinery

Dewo machinery can provides complete set of crushing and screening line, including Hydraulic Cone Crusher, Jaw Crusher, Impact Crusher, Vertical Shaft Impact Crusher (Sand Making Machine), fixed and movable rock crushing line, but also provides turnkey project for cement production line, ore beneficiation production line and drying production line. Dewo Machinery can provide high quality products, as well as customized optimized technical proposal and one station after- sales service.

Function Double Roll Crusher is also called Double Roll Sand Maker. It is used for medium and fine crushing of all kinds of medium hard ore and rock in mineral separation ,chemical industry, cement, building materials industrial department.

3 factors affecting roll crusher price The price of roll crushers is influenced by the following factors: Quality assurance of FTM roll crushers Quality. The quality of the crushers has a great impact on its price. The high-quality equipment will cost more in terms of workmanship, technology, materials, etc.

2PG 700*500 Double Roller Crusher For Gravel Stone : Application: Rock crushing, Stone crushing, Cement, Mining Double roller crusher ,roll crusher also can be called roller crusher,double roll crusher or teeth roll crusher,is suitable to be used in such industrial departments as cement, chemistry, power, metallurgy, building material and refractory for the medium and fine crushing of medium ...

Looking for cement crushing machine factory direct sale? You can buy factory price cement crushing machine from a great list of reliable China cement crushing machine manufacturers, suppliers, traders or plants verified by a third-party inspector.

Multi-cylinder hydraulic cone crusher; VSI sand making machine; Single cylinder hydraulic cone crusher; High efficiency fine crusher; 2-Roll crusher; Compound crusher; Hammer crusher; Spring cone crusher; Small mobile diesel engine jaw crusher; Granite / Basalt Crushing Processing Line; Electronic waste recycling machine/Circuit board

Powder grinding production line is widely used for making powders in the industries of mine, power plant, chemistry, building material, metallurgy, refractory, desulfuration in power station, pitch mixing station and highway and the granularity of the final products can be adjusted in the range of 20-3250 Mesh.

Dewo machinery can provides complete set of crushing and screening line, including Hydraulic Cone Crusher, Jaw Crusher, Impact Crusher, Vertical Shaft Impact Crusher (Sand Making Machine), fixed and movable rock crushing line, but also provides turnkey project for cement production line, ore beneficiation production line and drying production line.

double roll crushers | mclanahan

double roll crushers | mclanahan

Double Roll Crushers typically follow a primary or secondary crusher and are used for secondary and tertiary reduction of various minerals, such as ROM coal, clean coal, limestone, gypsum, trona, shale, bauxite, oil shale, coke, salt, lime, glass, kaolin, brick, shale and wet, sticky feeds. They are one of the most widely used crushers in the mining industry and have numerous advantages, such as high capacity, low headroom, low horsepower, the ability to handle wet, sticky feeds and the ability to produce a cubical product with minimum fines generation. Roll diameters and widths are dictated by the feed size, product size and capacity. The rule of thumb for the Double Roll Crushers ratio of reduction is 4:1.

The simplified design gives these units excellent reliability and requires very little maintenance. The crushers are designed with built-in tramp relief that allows for the passing of uncrushable objects while remaining in continuous operation and returning to the initial product setting. With a variety of roll surface designs, this crusher is capable of producing a much finer product. Since each machine is custom engineered, roll elements and tooth patterns are selected depending on each unique application.

McLanahan Double Roll Crushers feature slower roll speeds and a larger surface area to add prolonged life to the crushing elements, resulting in less maintenance downtime and decreasing your cost per ton. Double Roll Crushers generate minimum fines while producing a cubical product.

McLanahan Double Roll Crushers are designed for safety and many years of rugged operation. Effective tramp protection against non-crushable material is provided by an automatic spring-and-toggle system. This allows a movable roll to open, pass the material and return to its original setting for continued operation. Hydraulic product size adjustment allows producers to adjust for changes in product size requirements or to compensate for roll wear.

Operating Double Roll Crushers is quite simple. Whether it is a single or dual drive arrangement, the rolls are powered by electric motors and V-belt drive configurations, resulting in reliable and quiet operation. If it is a single drive arrangement, power is transferred from the driven roll to the non-driven opposing roll by an interstage V-belt drive. If it is a dual drive configuration, each roll is powered independently through a motor and V-belt drive.

During normal operation, the material is fed between the crushing rolls. A combination of compression and shear forces created between the opposing rolls reduce the feed material to the desired product size while producing a cubicle product with minimum fines.

McLanahans mechanical tramp relief systems employ a spring-and-toggle mechanism that activates whenever an uncrushable object enters the crushing chamber. Once an excessive force is applied to the movable roll, the toggles break open to allow the uncrushable item to pass. The high torsion springs then close the toggles, returning the movable roll to the previous setting. The crusher continues to operate uninterrupted.

When an uncrushable object, such as metal, roof bolts/timbers, etc., enters the crusher and the force necessary to crush this material is greater than the crushing forces of the crusher, the crusher allows the moveable roll to open and pass the tramp material and then return to its previous setting and remain in operation.

Depending on the customers desired product size and fines consideration, Mineral Sizers or Hammermills could be considered. The reasons people would consider a Roll Crusher over these alternative technologies include lower power requirements, less fines generation and costs.

Black Diamond Double Roll Crushers are the most versatile and popular model of McLanahan Double Roll Crushers. Ideal for secondary and tertiary crushing applications where product requirements drop down to (6mm), Black Diamond Double Roll Crushers are most commonly used to crush clean coal or friable materials with little or no hard refuse. They are available with single or dual V-belt drive.

Heavy-Duty Double Roll Crushers are ideal for the primary, secondary and tertiary crushing of limestone, gypsum, ROM coal, etc. where higher compressive strength material is anticipated. Due to the V-belt drive design, a lower horsepower is required compared to other crushers designed for the same applications.

Shalemaster Double Roll Crushers are driven mechanically with V-belt drives and gear reducers. They offer the same durability as other McLanahan Double Roll Crushers but are designed to handle wet, sticky feeds such as soft shale, kaolin and clay. The Shalemasters special tooth design and differential roll speeds provide optimum performance against plugging and other problems often associated with handling sticky materials.

Typically used as secondary or tertiary crushers, McLanahan Double Roll Crushers provide a 4:1 reduction ratio and can be used following other McLanahan equipment, such as Feeder-Breakers, Rotary Breakers, primary DDC-Sizers, or Single Roll Crushers, when further reduction of primary crushed material is required. Each Double Roll Crusher is selected and engineered for its specific application, thus roll elements and tooth patterns are selected based on the customers unique applications and designed to produce a cubical product with minimal fines.

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