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针对大型选煤厂难于实现对原煤以13 mm进行有效干法筛分的问题,在宁东选煤厂羊场湾分厂采用BFS3080RDD型弛张筛,将块煤分选下限深度从25 mm延伸至13 mm,将25~13 mm粒级精煤从末煤中提取出来,供煤化工使用,置换出142万t/a洗中块供其他用户使用,每年可提高经济效益12 638万元。通过弛张筛在羊场湾分厂的使用结果表明:弛张筛的使用,在降低筛分下限、提高筛分效率、减少维护成本、降噪防尘、节能等方面取得了显著效果。
In order to solve the problem of large-scale coal preparation plant is difficult to achieve effective dry screening of raw coal at 13 mm, BFS3080RDD reaming sieve was adopted at Yangchangwan Coal Preparation Plant of Ningdong Coal Preparation Plant to extend the lower limit of lump coal separation from 25 mm To 13 mm, 25 ~ 13 mm grain grade coal extracted from the end of the coal for coal chemical use, replacement of 1.42 million t / a washing block for other users to use, an annual increase of 126.38 million yuan of economic benefits. The results of using the relaxation sieve in Yangchangwan branch show that the use of relaxation sieve has achieved remarkable results in reducing the lower limit of screening, improving the screening efficiency, reducing the maintenance cost, reducing noise, preventing dust and saving energy.