Nickel Ore Ball Mill

At present, three types of nickel ore grinding machines are commonly used: grid ball mill, overflow ball mill and wet rod mill. So what are the characteristics of these three types of nickel ore grinding equipment, and how to choose?

1. Grid ball mill for nickel ore grinding machine

Nickel ore grinding machines commonly use grid-type ball mills, including conventional type, energy-saving type and conical type. The structural design of this type of ball mill is different from other ball mills. The main reason is that the unique grid plate design at the discharge area can force the materials to discharge, which reduces the residence time of the materials in the mill and reduces excessive wear. , effectively improving the grinding efficiency. However, due to its forced discharge of ore, the grinding particle size of this type of ball mill is relatively coarse, and the general discharge particle size is 0.2 to 0.3 mm.

In nickel ore beneficiation plants, it is generally used in first-stage grinding operations or rough grinding operations, and is often combined with a spiral classifier to form a grinding classification system.

2. Overflow ball mill for nickel ore grinding machine

Overflow ball mills for nickel ore grinding machines are also divided into three types: conventional type, energy-saving type and conical type. Their structures are basically the same. The main difference lies in the different auxiliary parts selected for energy saving and consumption reduction. In addition, the conical type barrel The body structure has a cone design. The overflow ball mill has no ore discharge grid design. When grinding, the ore will gradually move toward the discharge port according to the feeding of materials until it reaches the overflow weir and then be discharged. Therefore, the material stays in the barrel of the ball mill for a long time and is discharged. The ore speed is slower, but the grinding particle size is finer than the grid type, and the general particle size range is less than 0.2mm.

In nickel ore dressing plants, it is generally used in the second-stage grinding operation or fine grinding operation, and often forms a grinding classification system with a hydrocyclone.

3. Rod mill for nickel ore grinding machine

Rod mills used in nickel ore grinding machines are mostly wet rod mills. They are different from ball mills in that the medium used in the cylinder is steel rods. When processing 19~30mm materials, they can be well ground to 6~6mm. 10 mesh, due to the characteristics of the steel rod, can perform selective grinding operations. Generally, coarse-grained minerals are ground first, and then smaller-grained minerals are ground, which can effectively avoid excessive wear.

Rod mills can generally be used in the fine crushing stage of nickel ore, and can also be used in the coarse grinding stage. When the grinding particle size requirement in one operation is from 20 to 6 mm to 3 to 1 mm or when there are soft impurities in the nickel ore, Rod mill can be selected.

The above introduces you to three commonly used nickel ore grinding machines. In actual production, the grinding equipment should be determined by comprehensively considering the scale of the dressing plant, investment conditions, and the product direction after mineral processing.