煤泥尾矿活化增白实验研究

Experimental study on whitening and activation of slime tailings

探究了煤泥尾矿的煅烧活化和增白条件,煤泥尾矿经过预处理成为合成分子筛等无机产品的原料,提高煤泥尾矿附加值。结果表明:采用盐酸对煤泥灰酸浸处理效果最好,采用炉内冷却比室温冷却对煤泥尾矿除铁效果好。通过单因素实验得到煤泥尾矿的最佳煅烧条件为:800℃煅烧2h,铁的浸出量为6.07%,铝的浸出量为17.96%,白度为85。正交试验分析表明,煤泥尾矿的最佳增白条件为:煅烧温度750℃,煅烧时间1h,粒度150μm。煤泥尾矿的最佳活化条件为:煅烧温度750℃,煅烧时间2h,粒度74μm。

The roasting activation conditions and whitening conditions of slime were explored,in order to acquire raw material for molecular sieves synthesis and other inorganic products. The results show that： treatment effect of hydrochloric acid the best. After burning,the in-furnace cooling is superior to cooling in air for deironing. According to single factor experiment,the optimum roasting conditions is 2h calcination time at 800℃,the leaching amount of iron is 6. 07%,the leaching amount of aluminum is 17. 96%,the whiteness is 85. Orthogonal experiment shows that the optimum whitening slime conditions are as follows： roasting temperature： 750℃, roasting time： 1h, size： 150μm. Optimum activation slime conditions are as follows： roasting temperature： 750℃,roasting time： 2h,size： 74μm.