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

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.

Kaolin Rotary Kiln:http://www.xb-crusher.com/Rotary_Kiln/Kaolin-RotaryKiln.html
brick making machine:http://www.xingbangmills.com/solution/Brick_making_machine/Fly-ash-brick-machine.html

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