从高碳粉煤灰中浮选回收炭的试验研究  

Carbon recovery by flotation from high-carbon fly ash

作　　者：杨大兵[1] 陈萱[1] 

机构地区：[1]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081

出　　处：《武汉科技大学学报》2012年第4期250-253,共4页Journal of Wuhan University of Science and Technology

摘　　要：基于工艺矿物学原理,对某动力厂排放的高碳粉煤灰进行浮选回收炭的可选性试验。结果表明,粉煤灰细度和浮选药剂用量是影响其浮选效率的重要因素。经过"一粗一扫"的浮选流程,可得固定炭含量分别为58.56%和49.20%的精炭,总回收率达到89.32%,尾灰的固定炭含量降至5.86%;而经过浮选全流程试验后,可得固定炭含量为76.93%的精炭,总回收率为70.17%,尾灰固定炭含量为11.89%,且精炭和尾灰均可综合再利用。Guided by process mineralogy, experimental study of carbon recovery by flotation from high- carbon fly ash in a certain power plant was carried out. The results show that the fineness of fly ash and the amount of flotation reagents are the factors that affect the flotation efficiency most. By the flotation process of ＂ one roughing and one scavenging ＂, fine carbon with fixed carbon content of 58.56% and 49.20% can be obtained with a total recovery rate of 89.32% and the fixed carbon con- tent in tail ash decreases to 5.86%, while, by the closed circuit flotation process test, fine carbon with fixed carbon content of 76.93G can be obtained with a total recovery rate of 70. 17% and the fixed carbon content in tail ash decreases to 11.89%. Fine carbon and the tail ash can be both comprehensively utilized again.

关 键 词：粉煤灰 浮选 精炭 综合利用 

分 类 号：TQ536.4[化学工程—煤化学工程]