抑制剂降灰浮选试验研究

为降低浮选精煤灰分,研究了抑制剂种类和用量对煤泥浮选降灰效果的影响,并选出最佳抑制剂种类和用量。结果表明:抑制剂的加入对浮选精煤降灰效果显著,但同时会对精煤产率和浮选完善指标造成一定影响。玉米淀粉的精煤灰分降低最大,但精煤产率和浮选完善指标降低速度更快,因此玉米淀粉作为抑制剂时,选择性较差,严重抑制低灰精煤上浮;亚硫酸钠的精煤灰分降低较少,浮选完善指标降低较快;CMC的精煤灰分降低较多,但同时精煤产率和浮选完善指标总体小于丹宁;丹宁的精煤灰分普遍较低,且精煤产率和浮选完善指标较高。因此,对于试验煤泥,丹宁用量为300 g/t时,降灰效果明显,精煤灰分为10.09%,满足精煤灰分(10±0.1)%的要求,同时对精煤产率和浮选完善指标影响最小,对矿物的抑制效果最优。 To reduce the ash of clean coal during flotation,investigate the influence of inhibitor types and dosage on ash reduction effects. Meanwhile,determine the appropriate type and dosage. The results show that,the inhibitor can reduce the ash of clean coal obviously,but it affects the clean coal yield and flotation perfect index. The corn starch is a typical case,so it's unsuited to the flotation. Treated by sodium sulfite,the ash of clean coal decrease slightly,while the flotation perfect index decrease at a faster pace. CMC and tannic acid can decrease the ash of clean coal significantly. Taking CMC as inhibitor,the clean coal yield and flotation perfect index are lower,while the tannic acid can increase these two index. For experimental slime,when the tannic acid is 300 g / t,the ash reduction effects is best,the ash of clean coal is 10. 09 percent which meets the requirements,clean coal yield and flotation perfect index appear least affected