ball mill manufacturers product ball mill equipment - xinhai
Ball millis the most widely used grindingequipment at home and abroad. Among them, grid ball mill and overflow ball millare the most commonly used in the mineral processing industry and other industrialsectors. Therefore, almost all the ball mill manufacturer product grid ballmill and overflow ball mill.
Ball mill manufacturersgenerally producevarious models of grid ball mill. Grid ball mill is made of a shell, feedingpart, discharging part, main bearing, transmission system, etc. the feedingpart contains a head cover, trunnion, and feeder; the discharging part contains grid plate, head cover and discharging trunnion. Wet grid ball mill feedingpart has lower slurry surface than discharging trunnion, so wet grid ball millbelongs to low-level of discharge which can timely discharge fine grinding materialparticles and reduce over-grinding.
Ball mill manufacturers in general product variousspecifications of the overflow ball mill. It has a basic same structure with gridball mill and the difference is the structure of discharging part. Thedischarging end of the overflow ball mill is without discharging grid plate andfan room, only the diameter of the trunnion is significantly bigger than thefeeding, which makes the difference of slurry surface between the feeding partand the discharging part. Fine grinding particles and slurry overflow out fromthe mill with gravity. To prevent small ball and coarse particle overflow withpulp, there is a helical blade in the discharging trunnion which has oppositerotating direction, and fine particles suspended in the slurry and overflow abovethe helical blade. Coarse particles and small steel balls sink between thehelical blades and are back to the mill by reverse rotation helical blade.
As a domestic and foreign well-known ballmill manufacturer, Xinhai product all various models of grid ball mill andoverflow ball mill. And in the production of ordinary type ball mill, itproduces various types of wet energy saving grid ball mill, wet energy savingoverflow ball mill, cone grid ball mill, cone overflow ball mill. Its ball millhas advantages of long service life, high efficiency, low energy consumptionand steel consumption, etc. it is the best choice for many new and old oredressing plants.
ball mill | gold separator | star trace pvt. ltd
Ball Mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium. Different materials are used as media, including ceramic balls, flint pebbles and stainless steel balls. An internal cascading effect reduces the material to a fine powder.
Industrial ball mills can operate continuously fed at one end and discharged at the other end. Large to medium-sized ball mills are mechanically rotated on their axis but small ones normally consist of a cylindrical capped container that sits on two drive shafts (pulleys and belts are used to transmit rotary motion).
what's the difference between sag mill and ball mill - jxsc machine
A mill is a grinder used to grind and blend solid or hard materials into smaller pieces by means of shear, impact and compression methods. Grinding mill machine is an essential part of many industrial processes, there are mainly five types of mills to cover more than 90% materials size-reduction applications.
Do you the difference between the ball mill, rod mills, SAG mill, tube mill, pebble mill? In the previous article, I made a comparison of ball mill and rod mill. Today, we will learn about the difference between SAG mill vs ball mill.
AG/SAG is short for autogenous mill and semi-autogenous mill, it combines with two functions of crushing and grinding, uses the ground material itself as the grinding media, through the mutual impact and grinding action to gradually reduce the material size. SAG mill is usually used to grind large pieces into small pieces, especially for the pre-processing of grinding circuits, thus also known as primary stage grinding machine. Based on the high throughput and coarse grind, AG mills produce coarse grinds often classify mill discharge with screens and trommel. SAG mills grinding media includes some large and hard rocks, filled rate of 9% 20%. SAG mill grind ores through impact, attrition, abrasion forces. In practice, for a given ore and equal processing conditions, the AG milling has a finer grind than SAG mills.
The working principle of the self-grinding machine is basically the same as the ball mill, the biggest difference is that the sag grinding machine uses the crushed material inside the cylinder as the grinding medium, the material constantly impacts and grinding to gradually pulverize. Sometimes, in order to improve the processing capacity of the mill, a small amount of steel balls be added appropriately, usually occupying 2-3% of the volume of the mill (that is semi-autogenous grinding).
High capacity Ability to grind multiple types of ore in various circuit configurations, reduces the complexity of maintenance and coordination. Compared with the traditional tumbling mill, the autogenous mill reduces the consumption of lining plates and grinding media, thus have a lower operation cost. The self-grinding machine can grind the material to 0.074mm in one time, and its content accounts for 20% ~ 50% of the total amount of the product. Grinding ratio can reach 4000 ~ 5000, more than ten times higher than ball, rod mill.
Ball mills are fine grinders, have horizontal ball mill and vertical ball mill, their cylinders are partially filled with steel balls, manganese balls, or ceramic balls. The material is ground to the required fineness by rotating the cylinder causing friction and impact. The internal machinery of the ball mill grinds the material into powder and continues to rotate if extremely high precision and precision is required.
The ball mill can be applied in the cement production plants, mineral processing plants and where the fine grinding of raw material is required. From the volume, the ball mill divide into industrial ball mill and laboratory use the small ball mill, sample grinding test. In addition, these mills also play an important role in cold welding, alloy production, and thermal power plant power production.
The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mills crushing ratio is smaller. The feed size is usually between 20-30mm and the product size is 0-3mm.
Both the autogenous grinding mill and the ball mill feed parts are welded with groove and embedded inner wear-resistant lining plate. As the sag mill does not contain grinding medium, the abrasion and impact on the equipment are relatively small.
The feed of the ball mill contains grinding balls. In order to effectively reduce the direct impact of materials on the ball mill feed bushing and improve the service life of the ball mill feed bushing, the feeding point of the groove in the feeding part of the ball mill must be as close to the side of the mill barrel as possible. And because the ball mill feed grain size is larger, ball mill feeding groove must have a larger slope and height, so that feed smooth.
Since the power of the autogenous tumbling mill is relatively small, it is appropriate to choose dynamic and static pressure bearing. The ball bearing liner is made of lead-based bearing alloy, and the back of the bearing is formed with a waist drum to form a contact centering structure, with the advantages of flexible movement. The bearing housing is lubricated by high pressure during start-up and stop-up, and the oil film is formed by static pressure. The journal is lifted up to prevent dry friction on the sliding surface, and the starting energy moment is reduced. The bearing lining is provided with a snake-shaped cooling water pipe, which can supply cooling water when necessary to reduce the temperature of the bearing bush. The cooling water pipe is made of red copper which has certain corrosion resistance.
Ball mill power is relatively large, the appropriate choice of hydrostatic sliding bearing. The main bearing bush is lined with babbitt alloy bush, each bush has two high-pressure oil chambers, high-pressure oil has been supplied to the oil chamber before and during the operation of the mill, the high-pressure oil enters the oil chamber through the shunting motor, and the static pressure oil film is compensated automatically to ensure the same oil film thickness To provide a continuous static pressure oil film for mill operation, to ensure that the journal and the bearing Bush are completely out of contact, thus greatly reducing the mill start-up load, and can reduce the impact on the mill transmission part, but also can avoid the abrasion of the bearing Bush, the service life of the bearing Bush is prolonged. The pressure indication of the high pressure oil circuit can be used to reflect the load of the mill indirectly. When the mill stops running, the high pressure oil will float the Journal, and the Journal will stop gradually in the bush, so that the Bush will not be abraded. Each main bearing is equipped with two temperature probe, dynamic monitoring of the bearing Bush temperature, when the temperature is greater than the specified temperature value, it can automatically alarm and stop grinding. In order to compensate for the change of the mill length due to temperature, there is a gap between the hollow journal at the feeding end and the bearing Bush width, which allows the journal to move axially on the bearing Bush. The two ends of the main bearing are sealed in an annular way and filled with grease through the lubricating oil pipe to prevent the leakage of the lubricating oil and the entry of dust.
The end cover of the autogenous mill is made of steel plate and welded into one body; the structure is simple, but the rigidity and strength are low; the liner of the autogenous mill is made of high manganese steel.
The end cover and the hollow shaft can be made into an integral or split type according to the actual situation of the project. No matter the integral or split type structure, the end cover and the hollow shaft are all made of Casting After rough machining, the key parts are detected by ultrasonic, and after finishing, the surface is detected by magnetic particle. The surface of the hollow shaft journal is Polished after machining. The end cover and the cylinder body are all connected by high-strength bolts. Strict process measures to control the machining accuracy of the joint surface stop, to ensure reliable connection and the concentricity of the two end journal after final assembly. According to the actual situation of the project, the cylinder can be made as a whole or divided, with a flanged connection and stop positioning. All welds are penetration welds, and all welds are inspected by ultrasonic nondestructive testing After welding, the whole Shell is returned to the furnace for tempering stress relief treatment, and after heat treatment, the shell surface is shot-peened. The lining plate of the ball mill is usually made of alloy material.
The transmission part comprises a gear and a gear, a gear housing, a gear housing and an accessory thereof. The big gear of the transmission part of the self-grinding machine fits on the hollow shaft of the discharge material, which is smaller in size, but the seal of the gear cover is not good, and the ore slurry easily enters the hollow shaft of the discharge material, causing the hollow shaft to wear.
The big gear of the ball mill fits on the mill shell, the size is bigger, the big gear is divided into half structure, the radial and axial run-out of the big gear are controlled within the national standard, the aging treatment is up to the standard, and the stress and deformation after processing are prevented. The big gear seal adopts the radial seal and the reinforced big gear shield. It is welded and manufactured in the workshop. The geometric size is controlled, the deformation is prevented and the sealing effect is ensured. The small gear transmission device adopts the cast iron base, the bearing base and the bearing cap are processed at the same time to reduce the vibration in operation. Large and small gear lubrication: The use of spray lubrication device timing quantitative forced spray lubrication, automatic control, no manual operation. The gear cover is welded by profile steel and high-quality steel plate. In order to enhance the stiffness of the gear cover, the finite element analysis is carried out, and the supporting structure is added in the weak part according to the analysis results.
The self-mill adopts the self-return device to realize the discharge of the mill. The self-returning device is located in the revolving part of the mill, and the material forms a self-circulation in the revolving part of the mill through the self-returning device, discharging the qualified material from the mill, leading the unqualified material back into the revolving part to participate in the grinding operation.
The ball mill adopts a discharge screen similar to the ball mill, and the function of blocking the internal medium of the overflow ball mill is accomplished inside the rotary part of the ball mill. The discharge screen is only responsible for forcing out a small amount of the medium that overflows into the discharge screen through the internal welding reverse spiral, to achieve forced discharge mill.
The slow drive consists of a brake motor, a coupling, a planetary reducer and a claw-type clutch. The device is connected to a pinion shaft and is used for mill maintenance and replacement of liners. In addition, after the mill is shut down for a long time, the slow-speed transmission device before starting the main motor can eliminate the eccentric load of the steel ball, loosen the consolidation of the steel ball and materials, ensure safe start, avoid overloading of the air clutch, and play a protective role. The slow-speed transmission device can realize the point-to-point reverse in the electronic control design. When connecting the main motor drive, the claw-type Clutch automatically disengages, the maintenance personnel should pay attention to the safety.
The slow drive device of the ball mill is provided with a rack and pinion structure, and the operating handle is moved to the side away from the cylinder body The utility model not only reduces the labor intensity but also ensures the safety of the operators.
2tph rock gold ore mining plant in congo - jxsc machine
: Jaw crusher > Hammer mill > Shaking table. This flow sheet is quite suitable for small scale rock gold-bearing ore processing, especially for 1-2 tons per hour capacity rocky gold. Description: In Dec 2016, our factory JXSC built one small mining Rock Gold Ore Mining Plant for our Congo client. The processing capacity is 1-2 tons per hour, which rock gold mine is located in Kisangani, DRC Congo.
is composed of 1 set Jaw crusher, 1 set Conveyor belt, 1 set Hammer mill, 1 set Water pump, 2 sets Shaking tables. The Jaw Crusher and Hammer Mill are with diesel engine driving as per the clients requirement. Hammer mill is heightened on a steel support frame, with Platform and guardrail also include 2 feeding chutes to shaking tables. Feeding size of raw ores is 120-150mm, for Hammermill, over 90% of output size we can control to -1mm, so it can feed to Shaking Table directly.
In Africa, many rock gold mine conditions are quite similar to this gold ore mining client, the raw ores are quartz rocks and gold grade is relatively high, so adopt this processing method will be very effective with a high recovery rate.
JXSC provides a reasonable gold mining process flow chart and customizable gold extraction machine for different types of gold ore, mineral gold, alluvial gold, placer gold, stream gold, hard rock gold mining. Besides, gold extraction methods from ore are not the same, CIP gold processing plant, CIL gold processing plant, cyanidation process for gold extraction). You may interest in GOLD PROCESSING OVERVIEW Our factory JXSC owned an experienced engineering team, which can do gold wash plant design, recommend suitable machine models, as well as provide professional installation, commissioning and complete after-sales services for customers. Our chief engineer Mr.Wen also provided installation and commissioning guidance for this small rock gold plant, as well as training workers in the mine site.
a discussion on the measurement of grinding media wear - sciencedirect
Comminution operations are the most expensive and energy consuming in the mineral industry. Any action aiming at reducing the costs associated with that step is welcome, and lowering the consumption of grinding media figures among the main concerns related to decreasing comminution costs. To reach that goal, it is necessary to know and understand the wear mechanisms that take place during the grinding process, as well as to consider the details of such process like the inhomogeneous feed and the interaction between mineral slurry and grinding media. Wet grinding can also add a corrosive component to total wear mechanism, and then wear rates are expected to rise from synergies between corrosive and abrasive components. Though corrosion phenomena are broadly accepted to happen in wet grinding even when the ball alloy has high chromium content studies on verifying its importance are scarce. Tests in laboratory mills can simulate most of the conditions present in the industrial mill, despite being inexpensive and much faster than the tests performed with industrial equipment.
Camila Peres Massola BSc (2005), MSc (2008) and PhD (2015) in Mineral Engineering from Universidade de So Paulo. Works as a researcher at IPT (Instituto de Pesquisas Tecnolgicas do Estado de So Paulo), in the area of Mineral Processing and Agglomeration of the Laboratory of Metallurgical Processes. Has experience in mineral processing, comminution, wear of grinding media, agglomeration, CDW processing.
Arthur Pinto Chaves Graduated in Metallurgical Engineering (1969), MSc and PhD in Mineral Technology (1972) from Universidade de So Paulo. Works as a researcher at ITV Instituto Tecnolgico Vale and is a retired full professor at the Department of Mining Engineering in the Universidade de So Paulo. Has experience in mineral processing, mineral technology, sustainable mining, flotation.
Eduardo Albertin Graduated in Metallurgical Engineering from Escola de Engenharia Mau (1975), MSc (1984) and PhD (1994) in Material and Metallurgical Engineering from Universidade de So Paulo (1994). Works as a researcher at IPT (IPT (Instituto de Pesquisas Tecnolgicas do Estado de So Paulo), in the Laboratory of Metallurgical Processes. Has experience in Material and Metallurgical Engineering, acting on the following subjects: metallurgy, foundry, metal alloys, and wear of materials.
gold flotation,line,dressing,processing,plant in tanzania | prominer (shanghai) mining technology co.,ltd
2.Uneven grinding and feeding. The original electromagnetic vibration feeder used for grinding is too small, and the feeder is often blocked, and the amount of ore fed fluctuates, which affects the grinding efficiency.
3.The large eccentric force of the single spoon head feeder of the first stage grinding machine causes the ball mill to run unsteadily, the tile seat vibrates violently, the current is large and small, the operating current is 140~80A, the fluctuation range is large, and the spoon head wears relatively Fast and high frequency of replacement.
4.With the annual reduction of open-pit oxide ore, the proportion of primary ore is increasing year by year. Primary ore is more difficult to grind than oxide ore, which affects the fineness of grinding. The steel ball ratio is unreasonable, and the grinding potential of the mill is not fully realized.
5.The raw slurry pump of the grinding system has high speed, severe impeller wear, short maintenance period, and low slurry pumping capacity; when the grinding capacity increases, the pumping is not timely, which often causes the slurry to overflow from the sand box.
6.The thickener of the grinding system is too small, basically unable to play the role of thickening. The thickener currently used in the grinding system is 5.18m, the slurry concentration discharged into the thickener by the cyclone is about 39%, and the concentration of the thickener discharged is about 40%; here the thickener has little thickening effect, and its effect is equivalent In a slurry buffer tank.
7.Coarse-grained gold accounts for a relatively large proportion. The annual output of heavy placer gold in the gold ore dressing plant accounts for about 25% of the annual gold output. When the coarse-grained gold enters the leaching system, the process flow cannot be satisfied due to the long leaching time required, which further affects the tailings and tailing liquid indicators.
Prominer has been devoted to mineral processing industry for decades and specializes in mineral upgrading and deep processing. With expertise in the fields of mineral project development, mining, test study, engineering, technological processing.
mining/ore milling - mt baker mining and metals
We use a variety of machinery combinations to liberate the gold and concentrate it for recovery. The all-inclusive Turn-Key Ore Processor will take a loader-bucket of ore and produce concentrated gold and sulfides with no hands-on activity by the operator. For a less costly production system, using hand-fed machinery, we offer a jaw crusher, hammer mill, and shaker tableeach one a stand-alone component.Or for smaller-scale sampling with industrial-grade equipment, our low-cost combination of a hammer mill with an attached sluice gives the owner the ability to test many thousands of pounds of material to get a representative bulk sampling of ore values.
The jaw crusher has been a staple of the hardrock mining industry since its invention. It is used as a primary crusher for all types of ores. The jaw typically takes the larger run of mine product and produces a sized discharge for feed to a secondary crusher such as a cone crusher, ball mill, or hammer mill. We have sold our jaw crushers to many different industries over the years, but the hard rock mining industry is still the #1 purchaser of our jaw crushers.
The hammer mill or ball mill takes the <3/4 discharge from the jaw crusher and pulverizes it to liberate the values in the ore (usually gold), and one of them is a component of our Turn-Key Ore Processor. The size of the powder from a hammer mill is controlled by the size of the openings in the screen, and the discharge is processed on the shaker table. The hammer mill will produce discharge in the 20-30 mesh size. If additional size reduction is needed, a ball mill is a conventional choice instead of the hammer mill. Take a look at the procedure to determine the liberation size for a specific ore type.
If the shaker table tailings are too coarse, they can be classified with a spiral classifier, and the over-sized discharge returned to the ball mill for additional grinding. When concentrating gold ore, our shaker table will get a high percentage of the free gold >325 mesh, even down to less than 400 mesh, equaling or out-performing any table on the market. The shaker table is a component of our Turn-Key Ore Processor and it makes quite clean cuts of <16 mesh slurry between the free gold, sulfides, and tailings. The operator can sell the free gold and send the sulfides to the refiner if they contain additional values.
The spiral classifier separates the shaker table tailings into fine and coarse fractions. The coarse material is directed back to the grinding circuit to liberate more value, and the fine materialis directed to the waste settling pond.
The spiral classifier is also useful as a simple dewatering device when water is in short supply. When the water level in the classifier pool is high, only the very finest of material is discharged from the tank, and the maximum amount of material is augered up the incline, draining the water as it climbs to the upper discharge point.
The MBMMLLC Turn-Key Ore Processor is made up of several modules and provides the operator with a reasonably priced, automated system to recover values with little operator involvement. The ore is loaded at the front end with a bucket and the gold and values-bearing sulfides are recovered off the shaker table. These are offered in 1, 2, and 4-5 ton/hr models.
For the small scale miner, these are the most cost effective, industrial grade processors available for continuous operation. The jaw crusher, hammer mill and fine gold shaker table form the heart of the processor.
For the small scale miner, these are the most cost effective, industrial grade processors available for continuous operation. The jaw crusher, hammer mill and fine gold shaker table form the heart of the processor.
We bought a turn-key ore processing system that included a hammer mill. The equipment did exactly what it was promoted to do and more. The combination of the jaw crusher with the hammer mill and shaker table did has good if not better than it was advertised by MBMM. I Read More
We have an MBMM 24 x 16 HD turnkey-scrap metal processor. We primarily process 6-8lb motor stators, smaller transformers and radiator ends to separate out the clean copper. We run this hard day after day and are very happy with how it performs and the on-going support from MBMM. This Read More
As a countertop fabricator, stone waste from the edges of the slabs is a constant headache and expense to deal with. We dispose of 5,000 lbs of cut-offs a day and the dumpster fees for disposal was getting out of hand. We purchased a crusher system from MBMM and have Read More
This customer reports they process mostlyPC boards populated with components and sell the concentrated mix of copper, base metals and precious metals to a copper refinery in Poland. Read More
The crusher (16 x 24 Jaw Crusher Module) is great! I probably have 300 hours on it and we are in the process of swapping around jaw plates. I am very impressed with your product and would have no hesitation in recommending you guys. Read More