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随着化肥工业的发展,对块煤的需要量越来越大。但由于采煤机械化程度日益提高,块煤的比率却越来越小。我们对入厂的大中块煤进行了粒度测定。其中8～20毫米粒度等级的小籽煤约占10%左右。按我们车间全年用煤30万吨计算,8～20毫米的小籽煤就有3万吨左右。如果能把这部分小籽煤用于制造合成氨,对降低供应煤定额,提高合成氨产量有很大的意义。我们克服了生产中的困难,在操作和设备方面作了改进,1979年共回收和使用8～20
With the development of fertilizer industry, the demand for lump coal is getting bigger and bigger. However, due to the increasing degree of coal mining mechanization, the ratio of lump coal is getting smaller and smaller. We conducted a large and medium-sized coal into the plant particle size determination. Among them, the size of 8 to 20 mm particle size of the small seed about 10%. According to our workshop 300,000 tons of coal throughout the year, 8 to 20 mm of small seed has about 30,000 tons. If you can use this part of the seed for the manufacture of synthetic ammonia, to reduce the supply of coal quotas, increase the output of synthetic ammonia is of great significance. We overcame the difficulties in production and made improvements in operation and equipment. In 1979, we recycled and used 8-20