煤气化细渣载体浮选提质研究

Flotation and quality improvement of gasified fine slag carrier

煤气化细渣是一种固体废弃物,其颗粒较小,表面多孔,对药剂的吸附量非常大,通过载体浮选可使药剂量降低30%~50%。通过接触角测量和扫描电镜,分析了气化细渣和加入载体后气化细渣的性质,并研究了载体浮选处理气化细渣的可行性。结果表明,采用载体浮选可以将气化细渣的灰分从68%降至24.62%,尾矿灰分可达96.43%,可燃物回收率高达94.61%,精矿热值6310kcal/kg,实现了气化细渣的高效回收利用。最后,分析了载体浮选的机理。

As a kind of solid waste,gasification fine slag is small particles with porous surface,which can absorb a large amount of reagent,so there are few economical and effective recovery methods.In this paper,the combustibles in gasified fine slag are recovered in carrier flotation,and the reagent dosage is greatly reduced by 30% ~ 50%,.Through contact angle measurement,scanning electron microscope analysis,the properties of the fine slag and fine slag with carrier are studied,and feasibility of carrier flotation for the fine slag is studied.The results show that,the carrier flotation method can reduce the ash content of gasified fine slag from 68% to 24.62%,and the ash content of tailings can reach 96.43%,the recovery rate of combustibles is 94.61%,and the calorific value of concentrate is up to 6310 kcal/kg.The fine slag is efficiently beneficiated.