布尔台选煤厂浮选因素研究

Research on main flotation factors of Buertai Coal Preparation Plant

根据国家能源集团清洁能源战略布局,未来煤炭的清洁高效利用是必然趋势。基于此,神东煤炭集团提出了煤泥浮选降灰脱硫优质利用的研发项目,布尔台选煤厂入选原煤牌号为长焰煤、不黏煤,矸石易泥化。针对原煤性质,布尔台选煤厂进行浮选工业试验研究,通过改变浮选试验过程中部分参数,分析影响该选煤厂浮选效果的主要因素。结果表明:布尔台区域煤泥可浮性较差,同时煤泥水<0.074 mm为主导粒级;当捕收剂使用量为2.7 kg/t(以干煤泥计),起泡剂使用量为3.0 kg/t时,浮选效果较好,浮选完善指标为36.71%;使用复配型捕收剂可以明显降低起泡剂使用量;当循环泵频率为45 Hz时,浮选效果最好。

According to the situation of the clean energy strategic layout of the National Energy Group,the clean and efficient utilization of coal is an inevitable trend.Based on the above background,Shendong Coal Group proposes the research and development project of high-quality utilization of coal slime flotation for ash reduction and desulfurization.Raw coal of Buertai Coal Preparation plant is long flame coal,non-stick coal,gangue easy to slime.Flotation industrial test was carried out.By changing some parameters in flotation test,the main factors affecting flotation effect were analyzed.The results show that the float-ability of slime is poor,and the dominant size of slime water is<0.074 mm.When the amount of collector is 2.7 kg/t and the amount of foaming agent is 3.0 kg/t dry coal slime,the flotation effect is better,and the flotation perfection index is 36.71%.The use of compound collector can obviously reduce the foaming agents amount.When the circulating pump frequency is 45 Hz,the flotation effect is the best.