Mill processing equipment usually pressing force between the steel ball grinding media and frictional force grinding material, iron ore, gold ore, copper ore grinding, smelting and metal, ceramic products, fine chemicals, cement production line, In power stations and other industries, ball mills can be used for grinding and milling operations. However, ball mills have long-term problems such as high energy consumption, fast steel wear and low grinding efficiency.
What are the main reasons that affect the efficiency of ball mills in beneficiation equipment? How are these reasons generated? How to improve the working efficiency of the ball mill of the beneficiation equipment?
1. The quality of the grinding body is matched and the quality of the ball is unreasonable. The specifications and loading capacity of the grinding body are not selected according to the special properties of different materials, resulting in low output coefficient of the ball mill equipment (output coefficient = output / load), generally Between 0.3 and 0.9.
2. The ore grinding process is not classified according to the required grinding energy to maximize the utilization of grinding energy.
3. When the materials with different physical properties and chemical properties are mixed and ground, the impurities in the materials are not screened and the bulk materials with excessive volume are attached, such as the inclusion of stones in the coal .
4. The work scheduling and the adjustment of surrounding supporting facilities are unreasonable. The ventilation performance, dryness and grinding output do not match, and unnecessary energy consumption increases.
5. The wear resistance of the abrasive body is not strong enough. After a few months of operation, the roundness rate increases, and the grinding output begins to gradually decrease.
Methods and concepts for improving grinding efficiency
1. Optimize the grading and loading of grinding balls such as steel balls: According to the specific conditions of material particle size distribution, the impact power required for grinding and the fineness of outlet fineness, the shape, size and load of grinding bodies with different specifications are determined. Grinding speed.
2. Optimize the design process and placement form of the grinding machine liner of the beneficiation equipment to realize the graded grinding operation: according to the movement law of the grinding process in the mill according to different particle size materials, improve the grinding of the steel ball by improving the combination and operation mode of the liner Dropping the body and dropping the highest point, so that the grinding body is graded in a self-adjusting manner according to the material particle size distribution specification along the length direction of the mill to maximize the energy supply.
3. Optimization of working environment: According to the unique properties of various ores (water content, grindability coefficient, electrostatic adsorption and other detailed parameters), through multi-directional multiple-time comprehensive test, it is reasonable to adjust the mill differential pressure according to the experimental results. , export temperature, material supply and the separation effectiveness of the separation and ore dressing equipment, establish the standardization and control parameters of the operation standardization, and keep the ball mill of the ore dressing equipment in good operation under the maximum output.
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