摘要
Direct reduction-leaching process for high ferric bauxite Wen-tao Hu, Hua-jun Wang, Chuan-yao Sun, Guang-kai Tong, Chun-ling Ji, and Cui-ling Wang Abstract: A direct reduction method was proposed which uses soda ash as the flux and coal as the reductant. By using this method hematite is reduced to iron, which can be recovered by magnetic separation, while A1203 is translated into sodium aluminate, which can be recovered from the solution. The effects of reduction temperature, reduction time, Na2CO3 dosage and reductant dosage on the grade of iron powder, the recovery of iron powder and the recovery of alumina were investigated on the basis of the single factor alteration principle. The process and reaction mechanism were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). Orthogonal experiments were designed for optimiz- ing the experimental parameters.
Direct reduction-leaching process for high ferric bauxite Wen-tao Hu, Hua-jun Wang, Chuan-yao Sun, Guang-kai Tong, Chun-ling Ji, and Cui-ling Wang Abstract: A direct reduction method was proposed which uses soda ash as the flux and coal as the reductant. By using this method hematite is reduced to iron, which can be recovered by magnetic separation, while A1203 is translated into sodium aluminate, which can be recovered from the solution. The effects of reduction temperature, reduction time, Na2CO3 dosage and reductant dosage on the grade of iron powder, the recovery of iron powder and the recovery of alumina were investigated on the basis of the single factor alteration principle. The process and reaction mechanism were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). Orthogonal experiments were designed for optimiz- ing the experimental parameters.