What are the main reasons affecting the efficiency of the ball mill of mineral processing equipment?

2021/11/12

What are the main reasons that affect the efficiency of mineral processing equipment ball mill?

　　Mineral processing equipment ball mill usually uses the squeezing pressure and friction force between steel balls and other grinding media to grind materials, in iron ore, gold ore, copper ore grinding, as well as metal smelting, ceramic products, fine chemicals, cement production lines, power stations and other industries, ball mills can be used for grinding and milling operations, however, ball mills have long existed in high energy consumption, rapid wear of steel, low grinding efficiency and other problems.

　　What are the main reasons that affect the efficiency of mineral processing equipment ball mill? How do these reasons arise? How to improve the efficiency of mineral processing equipment ball mill?

　　1, the grinding body grade matching and the quality of the number of loaded balls is unreasonable, and the grinding body specifications and loading capacity are not selected according to the special properties of different materials, resulting in low output coefficient of ball mill equipment (output coefficient = output/loading capacity), generally between 0.3 and 0.9.

　　2, the ore grinding process is not graded according to its required grinding energy, to achieve maximum utilization of grinding energy.

　　3, different physical characteristics and chemical properties of the material mixed grinding, the material in the debris not screened and incidental volume of large pieces of material, such as coal inclusions of stone and other cases.

　　4, work scheduling and peripheral supporting facilities are not adjusted reasonably, ventilation performance, dryness and grinding power do not match the three, there is unnecessary energy consumption rise.

　　5、The wear resistance strength of the grinding body is not enough, and the lost round rate increases after a few months of machine operation, and the grinding output starts to decrease gradually.

　　Methods and ideas to improve grinding efficiency

　　1、Optimize the grading and loading of steel balls and other grinding bodies: according to the specific situation of material granularity distribution, impact power required for grinding and export fineness particle size requirements, develop the shape, size and loading of different specifications of grinding bodies to improve the grinding speed.

　　2、Optimize the design process and placement form of the mill liner of mineral processing equipment to realize the grading and grinding operation: according to the movement law of different size materials in the grinding process in the mill, through improving the combination and operation mode of the liner, upgrade the steel ball and other grinding bodies to throw down and the highest falling point, so that the grinding bodies can be graded in a self-regulating way along the length of the mill according to the size distribution specifications of the materials to realize the maximum energy supply. The grinding body is self-regulated in the direction of the length of the mill according to the material size distribution specifications, so as to maximize the energy supply.

　　3、Operating environment optimization: according to the unique nature of various ores (water content, grindable coefficient, electrostatic adsorption and other detailed parameters), through multiple comprehensive tests, adjust the differential pressure of the mill, outlet temperature, material supply and separation effectiveness of the sorting and mineral processing equipment in accordance with the experimental results, establish standardized and conventional parameter control standards for operation, and keep the ball mill of mineral processing equipment continuously in the maximum The mill will operate well under the maximum output capacity.