Industrial News

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA (8)

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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.

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NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA (7)

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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, […]

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NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA (6)

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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 […]

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NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA (5)

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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.

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NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA (4)

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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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