煤泥浮选起泡剂的优化试验

通过对原生煤泥的粒度分析,说明曙光煤业选煤厂煤泥属于高灰煤泥,煤泥中含有较多易泥化矿物质,这些矿物质在浮选过程中容易因机械夹带作用而进入精煤产品,影响精煤质量。以曙光煤业选煤厂原生煤泥为研究对象,分析了不同起泡剂种类和用量对煤泥浮选效果的影响。结果表明:GF油、仲辛醇、TY001的最优浮选药剂组合分别为煤油400 g/t、GF油45 g/t,煤油300 g/t、仲辛醇45 g/t,煤油400 g/t、TY001 45 g/t。当药剂用量相同时,从可燃体回收率看,仲辛醇作用效果最优,其次为TY001,GF油最差;从浮选完善指标看,TY001与仲辛醇性能相当,均明显高于GF油,精煤产率、浮选选择性明显提高,尾煤灰分均达到60%以上。从技术经济方面考虑,在精煤灰分Aj≤11%的条件下,选择煤油与仲辛醇组合较为适宜,最佳药剂用量为煤油300 g/t,仲辛醇45 g/t。

Optimization test of frother for slime flotation

The screen analysis of primary slime in Shuguang coal preparation plant indicates that it＇s high ash slime,in which there are lots of easy-degradation mineral substances.Due to mechanical entrapment,these mineral substances are easy to mix into clean coal.Taking primary slime in Shuguang coal preparation plant as research object,analyse the effect of different frothers and their usage amount on slime flotation.The results show that,there are three great combinations of GF oil,2-octanol and TY001,which are kerosene 400 g/t and GF oil 45 g/t,kerosene 300 g/t and 2-octanol 45 g/t,kerosene 400 g/t and TY001 45 g/t.Keeping reagents amount unchanged,2-octanol could recycle most of the combustible,then TY001,GF oil recycles the least combustible.Judging by flotation index,the TY001 is almost the same as 2-octanol,both are greater than GF oil.Adopting 2-octanol and TY001,the clean coal yield and flotation selectivity remarkably improve,the tailings ash is above 60 percent.When clean coal ash is less than 11 percent,the combination of kerosene and 2-octanol gets the maximum profits and the optimum dosage of kerosene,2-octanol are 300g/t and 45 g/t.