山西某铝土矿提铝降铁试验研究

对山西某铝土矿进行了提铝降铁试验研究，结果表明：采用1粗1精1扫浮选、1次高梯度强磁选流程处理该矿石，可以将Al₂O₃品位为从64.80%提高到72.57%，回收率达86.86%；Fe₂O₃含量从3.28%降至1.81%，去除率达57.20%；适宜的磨矿细度是取得理想分选指标的前提；六偏磷酸钠和捕收剂RL在正浮选提铝作业中发挥了主导作用；六偏磷酸钠在强磁选降铁作业中具有显著的强化分散作用。

Aluminum Increasing and Iron Reduction Research on Shanxi A Bauxite

The aluminum increasing and iron reduction research on Shanxi a bauxite was carried out.The results show it could increase the Al2O3 grade from 64.80% to 72.57%,the recovery rate comes to 86.86%,while the concent of Fe2O3 decrease from 3.28% to 1.81%,the removal rate reaches to 57.20% when deal with the ore with one roughing,one cleaning,one scavenging and one high gradient magnetic separation.Appropriate grinding fineness is the guarantee of ideal separation index,sodium hexametaphosphate and RL flotation play a leading role in flotation to increasing aluminum,and sodium hexametaphosphate makes remarkable dispersion in the strong magnetic separation for iron reduction.