Large-scale ultra-fine mixing mill heavy calcium carbonate production in the submicron
July 2nd, 2012 | 
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Large-scale ultra-fine mixing mill heavy calcium carbonate production in the submicron
Large-scale ultra-fine mixing mill heavy calcium carbonate production in the submicron Peony1701 in the development of the river of grinding equipment, ball mill family occupies a very important historical position, its application is quite extensive, the equipment is also very mature until now is still very important equipment.With the continuous development of modern industrial production, however, crushed the requirements of increasingly high, the traditional ball mill has been unable to meet their specific requirements, so people trying to find more efficient, more energy-efficient ultra-fine grinding equipment.In this context, and began stirring mill of the invention and a process of continuous improvement.Klein and Szegvari 1928 put forward the concept of mixing mill and completion of the wet grinding of crushed high-speed stirred ball mill in 1948 advent, 1952, the river-side, Japan Dr. heavy wins towers mill.The development of new materials until the 1960s, a variety of mixing mill officially began to appear.Paper, plastics, paints and other industries, the pigment fineness fine, such as TSP coating level require-2um ≥ 90% -95%, d50 of ≤ 0.5-0.7um, and production requirements from 2-5 million t / a to 100,000 t / a.Grinding equipment is very active since the late 1980 '80L stripping machine began, there has been 100L, 300L and 500L large superfine stirred mill, the quality of equipment is also rising, from paint, paint industry, small sander positive metal ores and non-ferrous metal mining applications large mixing mill. The device structure and working principle of large-scale ultra-fine mixing mill structure consists of cylinder, modular agitator, gear and rack.The cylinder body is full of grinding media (zirconia beads, ceramic beads or glass beads).Gear driven stirring shaft rotating at a moderate speed, the agitator structure optimized to force driven by the dielectric sphere and materials for multi-dimensional circular rotary movement in the cylinder jaw crusher body, and squeezed under the pressure of the material in the grinding media and agitator rotation friction and impact The collision was effective grinding.Pump the slurry through the feeding port into the grinding cavity, via media between the strongly abrasive, shear and impact of the collision pulverized finished pulp is sieved from the upper sieve overflow discharged into the storage pulp barrels. Paper coated TSP requirements for paper coating of heavy calcium carbonate, in addition to meet the physical properties and chemical composition of the ore, but also meet the following requirements. Particle size and particle size distribution requirements: primer class of heavy calcium carbonate (GCC)-2um greater than 60%, while the the topcoat class size requirements of the heavy calcium carbonate-2um is greater than 90%.The general requirements for the whiteness of the coating TSP is greater than 90% or higher. Whiteness: whiteness is natural GCC has the advantage of the different ore source, whiteness to the marble, limestone, calcite, GCC white by 86% to 96%.The general requirements for the whiteness of the coating TSP is greater than 90% or higher. Rheology: the mud like the GCC have a good rheology, 75% of the the topcoat GCC solid content, fineness-2um greater than 95%, viscosity requires less than 300mpa.s. Wear: wet the GCC wear than Feier Kang wear Yee abrasion value 800m/min speed is usually the determination of general filler is less than 25mg, the coated fabric is less than 5mg. The wet ground calcium carbonate products are being developed in the standard, manufacturers can refer to the implementation of and higher than the standard.Design and technology of the large mill mill design due to the impact of ultrafine stirred mill grinding process many factors, such as the nature of the material by grinding and grinding materials in which the state, the desired product fineness and the mechanical structure and other factors, theoretically design alone is unlikely.Our approach is: to make the necessary theoretical analysis, the mill by intermittent operation of the laboratory experiment, to learn from the experience gained by the operation of the mill combining to determine the best large-scale ultra-fine vertical stirred mill The basic structure and parameters, and then the mechanical design. Simplified: Simplified high-impact media surface pressure, the media surface pressure with the cylinder height increases gradually increased, when more than a certain height, a very small change.According to the case of foreign equipment and our experience, the cylinder diameter to height ratio to take 1:5-1:6.Cylinder liner wear-resistant stainless steel, polymer materials lining or corundum lining, special industry can be designed according to specific requirements.To be a reasonable set of pump cylinder gave a discharge port, slurry overflow port, volleyball mouth and cleaning the mouth, etc., taking into account the heat situation, the cylinder design for the jacket, the actual proof of a good cooling effect.Blender: blender is the device's key components, the assembly of disk structure and leaf structure, solved the problem of start-up and wear.In a large number of experimental studies on the basis of their structural parameters to determine the right is not simply a mechanical imitation.Determine whether the principle is the ball mill blender outer diameter to the cylinder wall clearance should meet the card ball, and make full use of the energy is low fog ball movement transmitted to the Na Yun grip and cylinder wall wear.The gap size and speed, media size and stirrer.Leaves the number of choice considering the frequency of the transmission of energy, the dielectric volume, power input, the grinding residence time, taking into account the mixing body force and equipment stability. Gear: a combination of motor direct drive planetary gear reducer to achieve the scope of work of the agitator speed.The basic process steps of the mill's process of wet ground calcium carbonate production line as follows: the ore, prepared by grinding conditions (ie, ore, water, additives ratio) pool of water, additives to join the mixing mixing a certain amount of time the uniform. Energy-saving Ball Mill The slurry pump or gear pump mixing pool original Stir the slurry into the buffer barrel. Diaphragm will be in the buffer in the bucket and stir the pulp from the mill into the mill at the bottom of the grinding. With the pulp mill gradually increased, grinding minerals (ie, finely ground slurry) from the mill upper overflow port overflow through the sieve shaker, along the pipeline into the storage pulp barrels.If necessary, set the multi-level vibrating screen and grading equipment, to ensure that the maximum particle size and particle size distribution. The above process is controlled by controlling the size of the overflow traffic to the residence time of the pulp mill, to control the fineness of the product, as well as the size of the production, continuous production process belongs to open.Greater than 60% -90% for-2um, can be a period of grinding, for greater than 95% -98% or higher-2um, and recommended uses two stages of grinding. Large ultrafine mill in wet grinding TSP industry 3600L stirred mill has been successfully applied in a large paper-making enterprises in Shandong.Product fineness-2um content greater than 68% of processing capacity 4.6t / h (solid content of 72% slurry meter), energy consumption is less than 40-50kW.h / t.Product fineness-2um content greater than 90% of processing capacity 2.1t / h (solid content of 72% slurry meter), energy consumption is less than 80-90kW.h / t. Industrial large-scale ultra-fine mixing mill production of ground calcium carbonate slurry to a foreign company product particle size, particle size d90 is less than 2um, as a coating pigment used in paper industry, to meet their industrial requirements. Large superfine stirred mill has been running from June 2004, the device performance and stability, low noise, energy consumption province, easy to operate.Successfully developed, will lead the technological progress of the wet grinding TSP manufacturers, improve the quality of the wet ground calcium carbonate products, greatly reducing energy consumption, lower production costs.Ground calcium carbonate slurry of 100 000 t / a sub-micron, for example, save electricity costs 20 yuan per ton, the annual savings of electricity 2 million yuan, considerable benefits. xingbang is one is engaged in producing jaw crusher, impact crusher, cone crusher, PCL vertical shaft impact crusher, high pressure mill, sand making machine, feeder, vibrating screen, the international type of mining machinery and equipment specialized enterprises.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the ideal equipment for the metallurgical industry and a variety of mineral grinding. xingbang is one is engaged in producing jaw crusher, impact crusher, cone crusher, PCL vertical shaft impact crusher, high pressure mill, sand making machine, feeder, vibrating screen, the international type of mining machinery and equipment specialized enterprises.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, ball mill as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the international specialized companies in the metallurgical industry and ideal for a variety of mineral grinding equipment, mining machinery and equipment.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the ideal equipment for the metallurgical industry and a variety of mineral grinding.
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Development and application of Energy-saving Ball Mill grading slurry pool
Development and application of Energy-saving Ball Mill grading slurry pool
Development and application of grading slurry pool -Peony1701 slurry pool is a concentrator in the set in the sand pump into the pulp mouth container, the structure type of cement, steel, its role is stable sand pump the slurry to the intake.And the pulp has a certain depth and pressure to improve the working efficiency of the sand pump. In this paper we introduce the author developed a new type of mortar pool classification Desliming function in actual use, it is not only the delivery of the sand pump more stable, but also play the classification of fine-grained mineral The and desliming the role of the the mortar pool, not only simplifies the production process, saving investment, but also make the production process much easier to operate. , Problem analysis, designed in 2003 an annual output of 300,000 tons of fine sand flotation production line put into operation in 2004, Tongliao areas of sand for natural aeolian sand, serious surface contamination trial, that, into the the pulp before the flotation, sand must be a strong scrub to remove the sand surface oxidation of pollutants, take off the muddy part, and to ensure that the clay content (-200 mesh) is less than 0.2%, so as to ensure the flotation of fine The quality of the sand. The production line put into production debugging found the following problems: hydraulic grader row of ore is not continuous, and the amount of instability, its row of the mine the largest and the smallest fluctuations in value of about 50 percent, resulting sieve dehydration to the amount of ore instability, also a direct result of the instability in the mixing tank to the amount of ore. The flotation of the dosage is the value given to the measurement of ore into the mixing tank to the intake can not be instantaneous with the amount of ore a large number fluctuations and changes, so a direct impact on the amount of ore and the correct amount of reagent withered pulp ratio so that the line is difficult to normal production of qualified products. Addition of an intermediate ore bin revised the tape into the mixing trough conveyor ore bin, plus set up an e-quantitative feeder, feeder metering feed into the mixing tank, so that the amount of ore basically stable, but also the production of fine sand also qualified. Second, the idea of grading slurry pool according to the existing problems in the production lines of the sweet flag card flotation in the company the Yamen camp placer I assume the flotation of an annual output of 500,000 tons production line, re-adjust the design ideas and solutions, and how solve the hydraulic grader nesting discontinuity and instability has become the most important issue, and replaced with other devices?Its the desliming effect ability to meet the requirements?Find information, decided to make improvements in the pulp Ikegami, pulp grading desizing operations by the original hydraulic grader changed by the slurry pool to complete the slurry pool to not only play the role of stability to the mine, but also played a classification off the mud, it is necessary to separate the muddy part of the pulp, but also to make a qualified sand does not run away.Therefore, the overflow of how stable the slurry in the slurry pool shallow area is crucial.The next there is a rise in the role of water, how to make the surface stable, I think tilt damping plate to resolve.This is equivalent to an increase of pool size of the settlement of several times the pulp, and pulp in the mezzanine between the damping plate to form a stable laminar flow.The effect of rising water, sand with different sizes of particle size and settling velocity of different stratified, fine particles with the rising water from the upper part of the overflow weir discharge, while the coarse-grained level sinking sucked out by the sand pump.This structure forms the overflow liquid is very stable, both to ensure the the classification desliming effect, but also to the sand pump's throughput to achieve a balanced and stable. Grading slurry pool works graded slurry pool works is by the ball mill trough to the pulp from the upper into the slurry pool, enter the tilt plate by conduction trough and rising water ball mill pipes (one for each pipe the upper several 10 rise in the water hole) grading area, its size grading of sand in the effect of rising water (adjustable of), smaller particles ball mill and muddy with water flowing through the grid of inclined plate layer rise through the overflow Weir discharge qualified sand settling velocity greater than the rising speed of the water sank to the bottom of the slurry pool, by the sand pump suction into the next job.It will not appear after the grading of sand interrupted row material or uneven nesting status feed stable.4, production practices yamen camp an annual output of 500,000 tons of flotation production line design process.The production line was in September 2005 put into operation by the production practices that hierarchical mortar pool on the sand after the scrub off the mud to reach the desired effect, the entire production process in all sectors of the ore to a normal, stable, tested its the desliming sand -200 mesh content of less than 0.2%, and the overflow of slurry pool no qualified Coarse sand phenomenon, the entire production line process is simple and easy to operate management.Conclusion bureaucratic camp flotation production line classification desliming hierarchical mortar pool after scrubbing sand, the greatest extent possible to simplify the production process, so that the whole process more stable, and easy to operate and control. Saving equipment investment, compared with the flotation line of sweet flag card sands, reducing the hydraulic grader two, glue screen a, a belt conveyor; saving construction investment, the less of four devices, the civil area is also a corresponding reduction; to reduce the installed capacity of 30KW, thus saving electricity, effectively reducing the cost of production. Hierarchical pulp pool in the project has made good use of effects, can also promote the use of other similar processing plant and processing plant with mud a large amount of other minerals. xingbang is one is engaged in producing jaw crusher, impact crusher, cone crusher, PCL vertical shaft impact crusher, high pressure mill, sand making machine, feeder, vibrating screen, the international type of mining machinery and equipment specialized enterprises.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the ideal equipment for the metallurgical industry and a variety of mineral grinding. xingbang is one is engaged in producing jaw crusher, impact crusher, cone crusher, PCL vertical shaft impact crusher, high pressure mill, sand making machine, feeder, vibrating screen, the international type of mining machinery and equipment specialized enterprises.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the international specialized companies in the metallurgical industry and ideal for a variety of mineral grinding equipment, mining machinery and equipment.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the ideal equipment for the metallurgical industry and a variety of mineral grinding.
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Detachable column mills and roller presses,
Detachable column mills and roller presses
Detachable column mills and roller presses, vertical mill, horizontal roller mill working principle and characteristics of contrast The-peony1701 is well known that the crushing process of grinding power consumption accounts for about 70% of the entire production of electricity consumption, in order to increase energy-saving way seeking to crush the industrial sector, the focus of experimental studies over the years has been concentrated in the grinding process and equipment, energy-saving . At present, the main grinding equipment tube mill, vertical mill, roller presses.Energy consumption of the traditional tube mill, long residence time of material within the mill, and noise; implementation of the vertical mill and roller press grinding roll, that can be effective utilization is high, low energy consumption, compact structure small footprint, vertical mill complex mechanical structure, vibration, high maintenance costs, low ventilation capacity, so the application of these mills have some limitations. The patented technology products detachable column mill is a reference and a combination of lying roller mill, vertical mill, roller press, and other characteristics of the roller mill on the basis of the development of a structure is simple, easy to use, energy saving, with broad applicability of a new type of fine crushing equipment. Structure, working principle tube mill works: give into the hollow cylindrical grinding of raw materials through the hollow journal.The cylinder contains various diameter grinding media (steel balls, steel bars, or gravel, etc.).When the cylinder around the horizontal axis of rotation at a certain speed, mounted on the barrel of raw materials in the role of the centrifugal force and friction with the cylinder reaches a certain height, when their gravity is greater than the centrifugal force, then out of the cylinder wall ejections falling or tumbling down because of the impact crushed ore.Mill rotation, the grinding media between the sliding movement of raw materials also produce abrasive. Roller press works: roller press work, the two rollers to rotate against each other.The top of the roller of a hopper, the material level to maintain a certain height, the gravity of the material, the loose material is forced to give into the two opposite movement between the roller.Meanwhile, the rotation of the roller with the roller friction material (ie, clamp into force) to pull the material.Under the joint action of gravity and clamp force, the material to squeeze into the roller, the material between the two roller compacted under high pressure into material cake, granular materials are crushed or micro-cracks. Vertical mill it works: feeding material from the center of the rotary disc, by centrifugal force to the disc around the mobile, into orbit.Grinding rollers in the role of pressure applied to the material bed in the track grinding force, the material by compression and shearing continue to move to the plate edge.After grinding the material into the mill the upper part of the powder were graded, while drying the materials, finished by hot air with the mill by the dust collector to collect down, meals, return the disc with the new feed materials with re- grinding, so I have a reciprocating grinding operation. Roll Mill Roll Mill is mainly a supporting for hydraulic sliding shoe on the rotary cylinder and a pressure roller lying in the free rotation of the cylinder body composed of. The rotary cylinder by an electric motor through reducer, drive pinion and ring gear drive.Grinding cylinder with attached and mill liner ring, the pressure roller with the hydraulic cylinder pressure to the material on the liner, and rotate with the rotary cylinder.Horizontal roller mill grinding belt feeder, and discharge with a three-part composition of the material by means of the special structure of the device uniform feed pressure roller.According to the requirements of the material grinding process can be adjusted by controlling the body material of the roll number of times to adjust the fineness of purpose. Grinding the material from the feed end into the supercritical speed rotary cylinder, close under the influence of centrifugal force on the rotary cylinder liner, the pressure cylinder body roll to roll several times after discharge.Out grinding the powder material is selected by the hoist, the coarse materials return to the mill, while the fine material after a dust collector as finished products into finished products. Detachable column in detachable column mill mill belonging to the pairs of rotary equipment, inside and outside the rotary motor via a gear drive to rotate at different speeds.Within the rotary body is the number of medium-speed rotary roll, the outer rotary body is a super-critical speed of rotation of the set with special structure of the liner tube.The feed material from the two sides of the body, the middle of the discharge tube rotation, roller shaft with the spindle revolution itself rotation, the use of medium-speed, low-voltage implementation of repeated rolling and rubbing crushed material layer.Through the adjustment of the rotary pressure from the device, the size of the adjustable roller pressure exerted by the material layer in order to meet different conditions require (roller pressure is the pressure exerted within the rotary pressure from the device and within the rotary body rotating roller centrifugal force generated by the superposition of a joint force).Adjusted rotary adjusting device can adjust the size of the gap between the roller and liner, and the backgauge ring with the ultimate control of the material thickness. Detachable column mill grinding principle and stand mill, roller press and lying roll grinding, roll grinding, that is, with the rolling pressure roller direct energy transfer to the grinding of materials and repeatedly squeeze The pressure and the completion of the grinding process. xingbang is one is engaged in producing jaw crusher, impact crusher, cone crusher, PCL vertical shaft impact crusher, high pressure mill, sand making machine, feeder, vibrating screen, the international type of mining machinery and equipment specialized enterprises.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the ideal equipment for the metallurgical industry and a variety of mineral grinding. xingbang is one is engaged in producing jaw crusher, impact crusher, cone crusher, PCL vertical shaft impact crusher, high pressure mill, sand making machine, feeder, vibrating screen, the international type of mining machinery and equipment specialized enterprises.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the international specialized companies in the metallurgical industry and ideal for a variety of mineral grinding equipment, mining machinery and equipment.Provide screening equipment to meet different production line of the sand and gravel sand for stone production line.The technical production of crushing and screening, as well as various types of milling machines and other general machinery of similar products in the domestic leading and reached the international advanced level.The production of various types of mill is the ideal equipment for the metallurgical industry and a variety of mineral grinding.
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