田庄选煤厂提高精煤产率的措施

为提高选煤厂精煤产率,分析了田庄选煤厂设备工艺存在的问题,通过将粗煤泥脱泥筛下水导入粗煤泥分选机,粗煤泥分选机入料桶改为角锥池,增加稳流装置、溢流槽;合理优化煤浆分配桶,及时加入调整剂,完善粗煤泥角锥池,改造粗煤泥方池入料管道;改造粗煤泥筛喷水系统,保证重介质旋流器入料均匀等分别对粗煤泥系统、浮选系统和末煤系统进行改造,并对改造后的工艺效果进行评价。结果表明:改造后粗煤泥分选机0.5~0.25 mm入料产率提高了3.27%,小于0.25 mm入料产率降低了2.94%,粗煤泥分选机入料组成明显改善,提高了精煤产率。改造后浮选精煤灰分降低了0.43%,精煤产率和数量效率分别提高了6.01%和0.21%,浮选机浮选效率得以提升。粗煤泥筛筛分效率提高,脱泥效果改善,末煤重介质旋流器的精煤产率和数量效率分别提高了6.15%和3.61%。

Measures of improving clean coal yield in Tianzhuang coal preparation plant

In order to improve the clean coal yield,the problems with the equipment and process of Tianzhuang coal preparation plant are analyzed.The coarse slime system,flotation system and slack coal treatment system were transformed.The specific measures were as follows. The water from coarse slime desliming sieve to coarse slime separator was diverted.The raw material barrel of separator with pyramid pool which was improved constantly was replaced,a current stabilizer and an overflow groove were installed,the coal water mixture distribution barrel was optimized,a regulator was added,the feeding pipe of coarse slime square pool and sprinkler system of coarse slime sieve were transformed,the feeding size of dense medium cyclone was homogenized.After transform,the yield of feeding ranging from 0.50 mm to 0.25 mm was increased by 3.27%,the yield of feeding below 0.25 mm was decreased by 2.94%.After transformed,for flotation system,the ash of clean coal was decreased by 0.43%,the clean coal yield and recovery efficiency were increased by 6.01% and 0.21%.After treated by dense medium cyclone,the clean coal yield and recovery efficiency were increased by 6.15% and 3.61%.