山东某高铁赤泥工艺矿物学研究

Study on Process Mineralogy of a High-Iron Red Mud from Shandong Province

采用化学分析、X射线衍射、激光粒度分析、光学显微镜、能谱分析和BPMA等多种分析手段,对山东某高铁赤泥从工艺矿物学角度进行了详细研究.结果表明:赤泥粒度很细,化学成分与矿物(相)组成非常复杂.主要矿物(相)为微粒硅渣、赤铁矿、铁-铝氧化物、褐铁矿,以及微量的硅铝酸钠、铁-钛氧化物、石英、三水铝石、软水铝石、长石、云母等矿物.赤泥中的铁主要赋存于赤铁矿、褐铁矿、铁-铝氧化物和微粒硅渣中.赤泥中微粒硅渣含量较大但其中的矿物(相)粒度很细.充分利用微粒硅渣中的铁、铝、钛、钠是关键.

A detailed study on a high-iron red mud from Shandong province in the perspective of process mineralogy were conducted through chemical analysis,XRD,optical microscope,laser particle size analysis,energy spectrum analysis and BPMA automatic analyzer.The results show that the red mud has a fine particle size,and the chemical composition and mineral(phase)composition are complex.The main minerals(phases)in red mud are particulate silicon slag,hematite,iron-aluminum oxide,limonite,as well as trace amounts of sodium aluminosilicate,iron-titanium oxide,quartz,gibbsite,bauxite,feldspar,and mica,etc.Iron occurs in the form of hematite,limonite,iron-aluminum oxide and particulate silicon slag.There is a large amount of particulate silicon slag in red mud,but the mineral(phase)particle size is fine.The key to taking full advantage of the red mud is how to make use of iron,aluminum,titanium and sodium in the particulate silicon slag.