无机电解质对水帘矿氧化煤泥浮选效率提升研究

Research on flotation efficiency improvement of inorganic electrolyte for oxidized coal slime

通过对水帘矿煤泥煤质分析,可得该矿煤泥具有变质程度低,易氧化,泥化程度高等特点,这些因素均造成煤泥可选性下降。文章通过在浮选过程中添加无机电解质改变氧化煤泥的表面电位,以降低煤泥表面氧化对产品质量的影响,提高该矿精煤产率和精煤回收率。实验结果表明,加入不同种类的无机电解质对于氧化煤泥的浮选效率均有一定的提升,其中Fe Cl3的作用效果最为明显。当Fe Cl3用量达到16mol/m3,浮选所得到的精煤产率相对比较高,灰分含量相对也比较低。精煤产率提升了7.33%,可燃体回收率提升了10.84%。

According to the property analysis of coal slime from Shuilian mine,the slime is low metamorphic,easily oxidized and highly slimed,which would decrease the flotability. The inorganic electrolyte was added into the flotation process to change the surface potentional of the oxidized coal slime,reduce the effect of surface oxidation to product quality and increase the yield and recovery of flotation concentrate. The result shows that,different types of inorganic electrolyte can all promote the coal slime flotation,while the effect of Fe Cl3 is the most obvious. At the dosage of 16 mol / m3 Fe Cl3,the optimum flotation result was achieved, with the coal yield and recovery of combustibles increased by 7. 33% and10. 84%.