吕梁山煤电公司选煤厂煤泥水处理技术改造

针对煤泥水系统细粒煤含量较大和矸石泥化的问题,吕梁山煤电公司选煤厂从浮选药剂的加药制度和工艺优化等方面进行探讨,结合入选原煤的煤质特征,通过新增机械搅拌式浮选机和多段拉开快速压滤机,大幅提升了该厂浮选精煤的产量和煤泥水系统的处理能力,实现了压滤煤泥全部回收,洗水闭路循环。

Leaching and recovery of zinc from leaching residue of zinc calcine based on membrane filter press

The feasibility of leaching and recovery of zinc from zinc leaching residue （ZLR） based on a membrane filter press （MFP） was investigated. Experimental results show that zinc calcines with particle sizes of less than 106 μm and chambers of widths of 30 mm are appropriate for establishing uniform filter cakes to obtain acceptable leaching and recovery results. The leaching of zinc from ZLR performed via washing at 90 to 96 ℃ for 90 min with spent electrolyte using a MFP results in a zinc extraction rate of 97%, and almost all of the zinc leached are recovered after water washing with MFP, thereby avoiding any loss in the ZLR. Compared with the traditional hot concentrated acid leaching process, the process based on MFP as a leaching reactor is able not only to ensure a high extraction rate but also to reduce the leaching time. Moreover, the thickening, pulping, second leaching, washing, filtering and pressing could be integrated and realized using a single MFP.

司马选煤厂扩能、增效技术改造的实践

介绍了司马煤业公司选煤厂现状及在增加产能、降低洗选成本的过程中存在的问题,通过优化工艺,对精煤脱介筛及煤泥水系统进行了局部改造,实现了增产增效。