How to improve the efficiency of ball mill

Shanghai Zenith production of ball mill grinding device as a generic, widely used in mineral processing, building materials and chemical industries, mushroom ball machine can be divided into two dry-wet Types of grinding methods. According to different ways of discharge can be divided into overflow type lattice-type ball mill ball mill two.

1.1 mill production problems Generally speaking, direct way to improve mill output there are three kinds:

1 mill crushing machine home front;

2, improved grinding system, improve grinding efficiency;

3, plus high-efficiency classifiers home.

We all know that the material was broken after the ball, then smash the key equipment. It is widely used in cement, silicate product, new building materials, Refractory material, fertilizer, black and non-ferrous mineral and glass ceramics manufacturing industry, a variety of minerals other grind-able materials can be dry or wet grinding . The above three methods, any one kind can be greatly improved mill yield. Of course, if conditions permit, then the factory, supporting the use of the above three methods, efficiency If the best. Three relationships: the former mill crushing prerequisite to ensure the powder after grinding, the fundamental transformation of the mill. Grinding the material into the mill before the crushing makes the greatly reduced size, Thereby reducing the grinding system load; separator efficiency, the most direct benefit to the maximum fine to be finished in time chosen, the finished product back to the cement powder to reduce the rate of Reduce the mill load; and transformation of the mill, will improved grinding system, the most fundamental solution. Into the ground particle size is reduced, improving the efficiency of the powder If the grinding efficiency of the system low, affecting not only mill production, also affect cement quality.

1.2 Cement Quality Cement quality, just from the ball mill for cocoa grinding process, the crushing and grinding the powder efficiency of the former is not directly related. Generally speaking, cement particles, particles smaller than 3μM rapid hydration Not conducive to long-term strength of cement, it is recommended not to exceed 10%; almost no activity greater than 65μM particles, preferably no; 16-24μM particles the highest activity. Have Adding limestone cement production. Limestone is not active, just a filler material, but it can improve the particle size distribution of cement products. Improve the quality of the cement production there are many ways to adjust the raw materials of the ingredient programs to change firing process, to strengthen equipment management, etc., which require By the production of cement units themselves, and may improve long study. Second, improve the production of ball mill .

2.1 Grinding Process After the study, without regard to the former mill crushing, grinding process so there are two types: open loop flow and flow. Under the same conditions, than to open stream high abortion ring About 20-35%. Circle flow products, more uniform particle distribution, is also more convenient to adjust the cement grade; and open flow of grind grinding material that is finished, the product particles Formed more dispersed distribution, storage over-grinding phenomenon, affecting the quality of cement production. Open circuit grinding of cement particle size distribution uniformity coefficient is generally 0.8-0.9, there are even more Low, only 0.7, the particle size distribution is very wide, cement 3D intensity may be higher, but later the strength of the hydration rate is relatively low, uniform coefficient of change than the quality of cement More difficult. air classifier for hammer mill will soon be greatly increased hydration water; and not more than 65μM particles hydration of concrete strength does not work. Therefore, we propose a Circle flow conditions using the best process cement production, cement grinding ring current particle distribution coefficient of 1.0, relatively narrow lot, a better quality of concrete More. This will not only reduce costs in large numbers, but also to cement quality has improved significantly.

2.2 into the ground particle size As the dry grinding mill when energy efficiency is only 2 to 3%, after years of domestic and international engineering and technical personnel research production practices, proposed " Little more than breaking ground to breaking ground on behalf of "pre-grinding process, the substantial increase in mill output, grinding power consumption is also significantly lower energy yield good results. The so-called" Pre-grinding process ", it will be into the ground particle size from 20-25MM reduced to 3-5MM, ball mill Ⅰ warehouse job content will be transferred to the crusher to complete, from The achievement of higher mill production target. Divided by product size to the general product particle size is less than 3-5MM called crushing crusher crusher (referred to as petty Machine). There used crusher crushing jaw crusher, hammer crusher, roll crusher, compound crusher, impact crusher, dryer, drum Drying machines.

2.3 and temperature of water into the ground material First need to explain, the more into the ground water is not wet, the better the material, cement fineness finer, more sensitive to water, water requirements necessary to lay the ball sub-paste Grinding. Generally believed that the material integrated into the ground water for every 1% increase in mill output will be reduced by 10%. When the water is greater than 5%, the mill on the basic "stop" powder Sharpening.

2.4 mill ventilation tube body Mill internal ventilation is good or bad, directly affect the grinding efficiency play, which opened to the natural flow of ground and pull the wind mill is relatively common memory problems. Ventilation and a powder mill in time to discharge, so as not to affect the grinding efficiency; two lower grinding temperature, to avoid dehydration of gypsum paste tail positions grate blocking the ball. When the material water Too large and poorly ventilated sub-mill, the mill water vapor emission problems, not only wet adhesion blocking grate fine seam, reducing the amount per unit time and the flow of materials through Speed.