The ball mills are the commonest unit for rock fragmentation. The operating principle of mechanism is very simple: the rotation of a shell with steel grinding balls corresponding to GOST. The content is pulverized or fragmented into larger fractions due to rotation of a shell.
The balls are divided into the following groups by their hardness:
- general purpose normal hardness;
- general purpose increased hardness;
- high hardness for grinding of ferrous metal ores;
- especially high hardness for grinding of nonferrous metal ores, cement, and refractories.
|Section designation||Section sizes||Product Standard||Hardness HRCэ (HB), at least, for groups|
|Limit nominal diameter deviations, mm||Nominal volume, cm3||Nominal weight, kg||1||2||3||4*|
|GOST 7524-89, DSTU 3499||on the ball surface||at the depth of ½ of the ball radius|
|40||±2,0||37,4||0,294||43 (401)||49 (461)||55 (534)||55 (534)||45 (415)|
|80||±3,0||299||2,35||40 (352)||42 (375)||52 (495)||52 (514)|
|100||±4,0||589||4,62||52 (514)||45 (415)|
|120||±5,0||1023||8,03||35 (302)||38 (331)||50 (477)||–||–|
*The especially high hardness balls with the diameter of 80 mm, 100 mm, are manufactured of steel grade Ш2Л as per TT 14788411-93-2009.
Chemical composition and hardness of balls manufactured of steel grade Ш2Л
The balls are delivered to the Customer unpacked or packed in big bags per 1 ton.
|Mass fraction of elements, as %||Hardness HRCэ (HB), at least|
|at most||at most|
|0,65 – 0,75||0,70 – 0,80||0,20 – 0,35||0,035||0,035||0,50 – 0,60||0,3||0,3||- on the ball surface – 52 (514);|
|at the depth of ½ of the ball radius – 45 (415)|
We deliver steel grinding balls for ball mils to the Customers at the best prices on a regular basis. The electric power stations, large-scale enterprises for manufacturing of building materials and other industrial products are among our Customers. The steel grades, sizes, and other indices being used correspond to GOSTs and other stringent Quality Standards.
Steel Grinding Balls. To buy at a profit in SPE «TechEnergoProm» LLC.
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Those who buy metal products, including the steel grinding balls 40 gr 3 and of other types, know that these products are permanently needed. The friction, wear, and other damage are unavoidable in this environment, and the content of shells must be replaced.
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