Grinding Equipment Selection Principles

Grinding Equipment Selection Principles
Ball mill and rod mill's processing capacity and the following factors: ore grindability, to the mine and the final product particle size, type and size of the grinding machine, lining shapes and matching the size(Limestone Crushers), the shape of grinding media, size, matching the proportion of its physical and mechanical properties, mill speed and pulp filling rate medium filling rate, the concentration of grinding, grading machine types and their work system. As the impact of mill capacity more factors, and changes in the larger, there is no accurate calculation of total processing capacity Marina what the theoretical formula. In the concentrator design, mill capacity is generally based on experimental experience to determine. Ball mill, rod mill processing power used or power law calculated the volumetric method.
Grinding machine selection should meet the following requirements:
(1) rod mill used for grinding, grinding grain, mostly minerals 1 ~ 3mm, re-processing plant for 0.5mm. Size too small, grinding efficiency decreased significantly. As the grinding rod mill in the movement, the rod mill diameter is generally not more than ф4500mm, grinding rod length should be greater than 6000mm. Rod mill and ball mill co-operation, rod mill and ball mill ratio should be 1:2.
(2) lattice-type ball mill used for grinding, are generally used for single-stage or two grinding grinding grinding in the first paragraph. Closed-circuit operation, the grinding fineness is generally 50 ~ 70%-0.074mm. Grinding machine equipped with a multi-spiral classifier.
(3) can be used for some overflow ball mill grinding, grinding can also be used for second or intermediate products, and then grinding. Currently used for second or intermediate product and then grinding operations, grading equipment is generally accompanied by hydrocyclones. Grinding mill for the first paragraph, sometimes also equipped with spiral classifier. Large ball (generally greater than ф4000mm), multi-use overflow-type ball mill and hydrocyclones form grinding circuit not only simplifies the mill structure and easy maintenance and overhaul.
(4) Since the mill, and a half from the mill and pebble mill selection, paying particular attention to whether the ore has a good self-grinding media, grinding media can be determined from the measured Ore from the grinding media index, and data processing determine whether the good from the grinding media, to determine the need for self-mill, SAG mill and gravel semi-industrial tests(Gold Mining Equipment Manufacturer in South Africa). Semi-industrial tests carried out with the empirical formula from the mill, pebble mill SAG mill and sizing.