The ball mill processing capacity volume method or power method to calculate the concentrator design. The following factors: the processing power of the ball mill ore grindability, to the mine and the final product particle size, grinding mining models and size, the shape of the liner and the size of the match, the grinding media

The shape, size, matching the proportion of its physical-mechanical properties, the rotational speed of the grinding media filling rate and pulp filling rate, grinding concentration, type of grading machine and its working system. Since many factors affect the ball mill processing capacity, and changes in the larger, there is no accurate calculation of grinding

Ore processing capabilities of the theoretical formula.
The ball mill Selection shall comply with the following requirements:

1, ball mill used for coarse grinding, grinding mineral particle size for 1 to 3 mm, re-election plant is 0.5mm. The particle size is too small, grinding efficiency decreased significantly. Due to the movement of the grinding rod mill, rod mill diameter generally should not be greater than the diameter of 4500mm, and the grinding rod length should not be greater than 6000mm.

The joint operation of the rod mill and ball mill, rod mill and ball mill ratio should be 1:2.

2, lattice-type ball mill is used for coarse grinding, generally used for single-stage grinding the first paragraph or two grinding grinding. Closed-circuit operation, the grinding fineness is generally 50% ~ 70%-0.074mm. Grinding machine with spiral classifier.

Overflow ball mill can be used for a period of grinding, regrinding the second paragraph of the grinding or intermediate products can also be used. At present, more than for the second paragraph or intermediate products regrinding jobs grading equipment is generally accompanied by a hydrocyclone. The first paragraph of the mill for grinding, sometimes with spiral classifier

. Large Ball (generally greater than the diameter of 4000 mm), the use of overflow ball mill and hydrocyclone grinding circuit not only simplifies the structure of the mill, double ease of maintenance and overhaul.

4, since the mill, SAG mill and pebble mill selection, to pay particular attention to good ore from the grinding media, available from the grinding media was determined by measuring the ore from the grinding media index and data processing whether with good results from the grinding media to determine the need for autogenous grinding, semi-

Grinding and gravel grinding semi-industrial tests. Semi-industrial test the empirical formula from the mill, SAG mill and pebble mill selection calculation.