高炭粉煤灰浮选脱炭试验研究

高含炭量的粉煤灰是一种不可被直接利用的固体废弃物。为降低高炭粉煤灰的烧失量,对高炭粉煤灰进行脱炭试验研究。本文通过磨矿试验确定高炭粉煤灰原灰最佳磨矿时间为1.25 min;通过浮选药剂制度试验确定磨细高炭粉煤灰最佳浮选药剂制度为仲辛醇用量为4 kg/t,煤油用量为12 kg/t;通过浮选工艺试验,确定磨细高炭粉煤灰最佳浮选工艺为叶轮机转速2 000 r/min、刮泡时间8 min、矿浆浓度120 g/L和单位面积充气量0.30 m³/(m²·min)。通过上述试验,最终可得到烧失量为0.63%,产率为60.64%的脱炭粉煤灰,烧失量可达到Ⅰ级灰要求。

Experimental Research on Decarbonization of High-CarbonFly Ash by Flotation

High-carbon fly ash is a kind of solid waste that can not be used directly. In order to reduce the loss on ignition of high-carbon fly ash, the decarbonization test of high-carbon fly ash was carried out. Through grinding test, the best grinding time of high-carbon fly ash is 1.25 min. Through the flotation reagent system test, it is determined that the best reagent system is the dosage of Sec-octyl alcohol 4 kg/t and kerosene 12 kg/t. Through the flotation process test, it is determined that the best flotation process of pulverized high-carbon fly ash is turbine speed of 2 000 r/min, scraping time of 8 min, mineral pulp concentration of 120 g/L and air volume per unit area of 0.30 m³/(m²·min). Through the above tests, the loss on ignition of the decarbonized fly ash is 0.63% and the productivity is 60.64%, which meets the grade I ash loss on ignition requirement.