摘要
针对张家岇选煤厂入选原煤灰分升高,产品质量下降等问题,分析了原煤分级粒度由25 mm调整为13 mm后对最终产品的影响。基于粒度调整后,原有香蕉筛存在筛分效率低、筛孔堵塞及清理麻烦等问题,提出采用2台弛张筛代替原有香蕉筛进行13 mm干法筛分。结果表明,采用13 mm分级后,中块煤产率由14.16%提高至24.29%,末混煤产率由原来的59.17%降至48.24%,每年可增收2079万元。采用弛张筛替换原有香蕉筛后,浅槽入料量与分级筛筛上错配物减少了13.90%,混入分选系统的煤泥量由8.69%降至2.17%,末混煤产率提高了3.44%,保证了原有浅槽的处理量,减少了对原有煤泥水处理系统的影响。
Affected by high ash of raw coal in Zhangjiamao coal preparation plant,the products quality decreased obviously. In order to resolve the problem,the raw coal classification size was changed from 25 mm to 13 mm. The change lowed the screening efficiency,it also made the screen aperture jammed easily. The original banana screens were replaced by two flip flow screens. The yield of medium- sized coal increased from 14. 16% to 24. 29%,the yield of mixed slack coal decreased from 59. 17% to 48. 24%. The revenue of plant increased by RMB 2. 079 × 107 per year. When used the flip flow screens,the feed quantity and mismatch content reduced by 13. 90%,and the slime content reduced from 8. 69% to 2. 17%,the yield of mixed slack coal increased by 3. 44%.
出处
《洁净煤技术》
CAS
2015年第5期38-41,共4页
Clean Coal Technology
关键词
弛张筛
分级粒度
筛分效率
混煤
flip-flop screen
classification size
screening efficiency
mixed coal
