The terms and definitions established in GB / T5611, GB / T 17445 and the following shall apply to this standard Medium Chromium abrasion-resistant cast grinding balls
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This standard specifies the terms and definitions, product classification, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of cast chromium alloy grinding balls for the building materials industry. This standard is applicable to chromium alloy cast grinding balls (hereinafter referred to as cast balls) used in building materials industry, and other cast […]
This standard was revised on the basis of JC/T 533 —1994. This standard shall replace JC/T 533-1994 since the date of the implementation.
Under the normal working condition of the ball mill, the ball mill runs from 720h to 3000h (according to the working conditions, and the specific time is agreed by both the supplier and the buyer). Accumulated the mass of the broken balls during the ball mill operation, call it as the mass. The broken balls […]
Falling-balls test to check the impact fatigue of the grinding balls (Hereinafter referred to falling ball test), under the laboratory condition, simulated the impact process for the grinding balls in the ball mill. Impact times counted by the counter. Impact failure time shows the grinding balls working life in such condition.
The casting grinding ball shall be inspected by the supplier’s quality inspection department. Chemical composition inspection shall be conducted in batches. If melt by induction furnace, each furnace as batch; if melt by cupola furnace, every 2hours as batch. Get one example to inspect the composition for each batch. If the test result is unqualified, […]
6.1 The diameter of the casting grinding ball is measured by a tool with an accuracy of not less than 0.01 mm. 6.2 The analysis method of the chemical composition should be according with the standards of GB/T 223. 3, GB/T 223. 4, GB/T 223.11, GB/T 223. 18, GB/T 223. 23, GB/T 223. 26, GB/T […]
5.1 The grinding balls tolerance of the diameter should be accord with Table 1. 5.2 The main chemical composition of each grades should be accord with Table 2.
4.1 Chrome alloy cast iron grinding balls are divided into 7 grades according to the chrome content. Nodular cast iron grinding balls are divided into two grades according to the matrix structure, I. E. Bainite ductile cast iron grinding balls and Martensite ductile cast iron grinding balls.
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