针对粗精煤脱水系统负荷大,粗精煤灰分、水分偏高等问题,平煤八矿选煤厂对粗精煤脱水回收工艺进行技术改造,采用粗精煤分级回收的改造方案,粗精煤产品灰分由11.25%降为10.66%,总精煤水分由13.23%下降为12.80%,每年增加经济效益1258.5万元。

In view of the large load of the crude refined coal dehydration system and the high moisture and ash content of coarse fine slime, the Pingmei No. 8 Mine Coal Preparation Plant carried out technical transformation of the coarse fine slime dehydration recovery process. Using the transformation scheme of graded recovery of coarse fine slime, the ash content was reduced from 11. 25% to 10. 66%, and the moisture content decreased from 13. 23% to 12. 80%, increasing the annual benefit by 12. 585 million yuan per annum, with significant economic benefits.

               
                    1 生产现状及存在问题
1.1 生产现状
1.2 存在问题
1.2.1 精煤磁选尾矿粗精煤含泥量高
1.2.2 TBS粗精煤含泥含水量超标
2 改造方案及实施效果
2.1 改造方案
2.1.1 分级回收TBS溢流
2.1.2 合并回收精煤磁选尾矿粗煤泥
2.1.3 升级叠层高频振动细筛
2.2 改造效果
2.2.1 分级选流器底流夹细得到改善
2.2.2 叠层高频振动细筛脱泥降灰效果显著
2.2.3 粗精煤产品水分明显降低
3 效益分析
3.1 精煤产率提高
3.2 运输成本降低
3.3 电耗降低
4 结 语