LLC «VALSA GTV» (Ukraine):

Kalashnikov V. A., Director, v_a_kalashnikov@ukr.net
Golovko L. G., Chief Engineer, golovckol@yandex.ua
Afanasyev E. S., Head of Department, guma.2007@mail.ru

An energy-saving technology is proposed for mineral raw materials grinding in ball drum mills. The proposed technology is distinguished by grinding bodies and ball mill drum liners interaction mechanism control, as well as grinding bodies’ trajectories in charge volume control. Grinding balls layer, adjacent to liners, slides on liners’ surface. This is achieved by using rubber liners of proposed designs for every stage of grinding. In mills of MShR type with Ø 85–100 mm balls liner plates of «Plate H-Wave» type working surface is formed by two planes, one horizontal and the other tilted to horizontal one at an angle of 100–175°. Rubber plate is of high strength and resistance to piercing and cutting by large lumps of material being ground. Liner plates are of varying height with respect to mill drum length, also taking into consideration their rate of wear. Liners of «Plate-Wave» type are proposed for mills with Ø 40–60 mm balls and tibbels. Liner plates working surface is shaped as triangular trapezium. Liner plates are made of rubber with high resistance to abrasive and hydroabrasive wear. While in operation, circular grooves are formed on plates’ surface, in accordance with diameter of balls being used. Grooves increase material total grinding surface by abrasion, specified size fraction product yield is increased, as well as content of fine size fractions in product in question. The proposed designs of liners may be applied in iron and base ores processing, as well as in other industries.

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