Quality control

A quality control system is implemented at the plant. A certified laboratory of metals operates for the control of accordance of billet to geometrical parameters and chemical composition, as well as for quality control of grinding balls, which allows testing products delivered to consumers according to world standards.

A certain amount of grinding balls is picked out from each party produced during the production chain. Each ball is tested by measuring its surface and volumetric hardness. If it is necessary to confirm or clarify the results of measurements or to provide microstructure and metallographic analysis grinding balls are additionally sent to independent expertise.

The shock resistance of balls is also controlled; a pile driver is installed and operated for this purpose. The energy of the pile drive impact is calculated on the basis of load experienced by balls in a mill. Each party of products passes the common control on shock resistance, thus excluding the probability of their breakage during operation. The factory is working to install equipment to make comparative tests of wear resistance of grinding balls produced from different steel grades. In addition, the possibility of balls manufacturing at the customer’s request is provided, with necessary surface and volumetric hardness, the quantity and energy of impact before the breakage.

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