This paper briefly describes the present situation of sound insulation ways universally adopted in steel ball coal mill and the noise intensity released during operation.

简述目前钢球磨煤机普遍采用的隔声方式及其运行过程中释放噪声强度的现状。

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A kind of waste heat treated low alloyed cast iron for making grinding ball in a coal grinder was studied.

研究了一种可用冲天炉生产的煤粉磨机磨球用低合金余热淬火耐磨铸铁。

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Make at the same time we to double in double out ball type coal pulverizer work principle , operation process, movement characteristic had further cognition with increase.

同时使我们对双进双出球磨煤机工作原理、作过程、行特性有了进一步了认识和提高。

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For instance, if we are talking about natural gas, in this case, fossil methane, we are talking about a whole different ball game than coal.

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And shipping cheap coal to China and India is putting powder and ball down the muzzle of the cannon that is pointed right at us.

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Mr Ball joined the armed services at 15 and spent 10 years in the Royal Navy before starting work for British Coal in 1964.

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