To solve the problem of poor comprehensive performance of wet sieving in Sihe Coal Preparation Plant of Jincheng Anthracite Mining Group, this paper analyzed coal washing process, and decided to take dry sieving to solve the problem. The practice shows that the comprehensive performance of JFDI-3048 flip-flop screen dry sieving is improved significantly after transformation and the economic benefits are increased.%为解决晋煤集团寺河矿选煤厂湿法筛分出现的综合性能差的问题，对洗煤工艺进行分析研究，决定采取干法筛分来解决。实践表明，改造后使用JFDI-3048弛张筛进行干法筛分其综合性能明显提高，经济效益显著。
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