Date of Delivery – Grinding Balls

At the end of June 2020, we dispatched 50 tons of casting high chrome grinding media balls to Uzbekistan, from Zhenzhou station to Tashkent station. We spent only 5 days to finish manufacturing.  This client is state-owned cement which has cooperated with us for the 2 years. Highly confirmed with the quality of our grinding […]

national standatd of the grinding balls

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(10)

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).  

national standatd of the grinding balls

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(9)

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 […]

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(8)

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.

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(7)

7.1 The casting grinding ball shall be inspected by the supplier’s quality inspection department. 7.2 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 […]

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(6)

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 […]

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(5)

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.

national standatd of the grinding balls

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(4)

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.

national standatd of the grinding balls

NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA(3)

GB/T 5611 established and the following terms and attributes shall apply to this standard Chrome alloyed cast iron grinding ball The white cast iron with chromium as main alloy element is called chrome alloy cast iron for short, and the cast grinding ball with chrome alloy cast iron as material is called chrome alloy cast iron grinding […]