The feed to a ball mill in India is prepared by single or multistage crushing and screening; crushing, screening, and rod milling; primary crushing and autogenous/semiautogenous grinding. In the discharge end of this mill, a slotted full diameter or partial diameter grate with discharge lifter assembly conveys the material to the discharge trunnion opening. The grate serves to retain balls, tramp, and coarse material. A gradient created between the feed opening and the discharge slots eases the flow of material.
Automatic operation saves power, grinding media, and liner wear, while increasing capacity. Software can be developed to suit the most complicated circuits and complex ores. Where size control of the final product is important, closed circuit grinding is the most efficient method of operation. The production of a higher quality product at a lower cost justifies the additional capital investment.
SBM process engineers will assist you with circuit and circuit control design as well as start-up, operation, and optimization of the milling plant. Productive grinding systems are the result of the efforts of disciplines ranging from mechanical design and metallurgy of materials to process engineering and instrument application.
Desired grinding results are achieved only through careful and skillful attention to detail. Our engineers can specify or supply computer control systems for the sophisticated circuits. The cost of computer hardware decreases almost daily, making these controls feasible for smaller installations.