Abstract：Red mud is the solid waste residue generated during alumina production from bauxite， which contains considerable amount of alumina， ferric oxide and other valuable metals. In order to recovery alumina and iron from red mud， the process of pig iron produced by direct reduction-smelting of carbon-containing red mud pellets， and alumina leaching from self-disintegrating slag was developed. The effects of different process parameters on extraction of iron and alumina from red mud were researched. The optimum reaction parameters were obtained as the following： the ratio of carbon to oxygen is 1.8， the time of direct reduction at 1 250 ℃ is 60 min， the time of smelting at 1 500 ℃ is 20 min， slag cooling rate must be less than 20 ℃/min， the ratio of calcium oxide to alumina is 1.6. With these optimum parameters， the phosphorus and sulfur content in the pig iron were 0.047% and 0.017% respectively， the ferrous oxide content in the slag was 1.26%， the slag can disintegrate completely， and the alumina leaching ratio can reach 86.65%.
高建军，齐渊洪，居殿春，程相利，郭玉华. 从赤泥中联合提取铁和氧化铝试验[J]. 钢铁, 2015, 50(9): 11-16.
GAO Jian-jun，QI Yuan-hong，JU Dian-chun，CHENG Xiang-li，GUO Yu-hua. Experiment on the combined extraction of iron and alumina from red mud. Iron and Steel, 2015, 50(9): 11-16.
Liu W C, Yang J K, Xiao B. Application of Bayer red mud for iron recovery and building material production from alumosilicate redidues[J]. Journal of Hazardous Materials, 2009, 161:474.
[4]
Liu W C, Yang J K, Xiao B. Application of Bayer red mud for iron recovery and building material production from alumosilicate redidues[J]. Journal of Hazardous Materials, 2009, 161:474.
Li Y R, Wang J, Wang X J, et al. Feasibility study of iron mineral separation from red mud by high gradient superconducting magnetic separation[J]. Physica C, 2011, 471:91.
[6]
Li Y R, Wang J, Wang X J, et al. Feasibility study of iron mineral separation from red mud by high gradient superconducting magnetic separation[J]. Physica C, 2011, 471:91.
Yatsenko S P, Pyagai I N. Red mud pulp carbonization with scandium extraction during alumina production[J]. Theoretical Foundations of Chemical Engineering, 2010, 44(4):563.
[9]
Yatsenko S P, Pyagai I N. Red mud pulp carbonization with scandium extraction during alumina production[J]. Theoretical Foundations of Chemical Engineering, 2010, 44(4):563.
[10]
Ju S H, Lu S D, Peng J H, et al. Removal of cadmium from aqueous solutions using red mud granulated with cement[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(12):3140.
[10]
Ju S H, Lu S D, Peng J H, et al. Removal of cadmium from aqueous solutions using red mud granulated with cement[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(12):3140.
[11]
Zhang K Y, Hu H P, Zhang L J, et al. Surface charge properties of red mud particles generated from Chinese diaspore bauxite[J]. Transactions of Nonferrous Metals Society of China, 2008, 18(5):1285.
[11]
Zhang K Y, Hu H P, Zhang L J, et al. Surface charge properties of red mud particles generated from Chinese diaspore bauxite[J]. Transactions of Nonferrous Metals Society of China, 2008, 18(5):1285.
[12]
Zhu D Q, Chun T J, Pan J, et al. Recovery of iron from high-iron red mud by reduction roasting with adding sodium salt[J]. Journal of Iron and Steel Research International, 2012, 19(8):01.
[12]
Zhu D Q, Chun T J, Pan J, et al. Recovery of iron from high-iron red mud by reduction roasting with adding sodium salt[J]. Journal of Iron and Steel Research International, 2012, 19(8):01.
[13]
Li X B, Xiao W, Liu W, et al. Recovery of alumina and ferric oxide from Bayer red mud rich in iron by reduction sintering[J]. Transactions of Nonferrous Metals Society of China, 2009, 19():1342.
[13]
Li X B, Xiao W, Liu W, et al. Recovery of alumina and ferric oxide from Bayer red mud rich in iron by reduction sintering[J]. Transactions of Nonferrous Metals Society of China, 2009, 19():1342.
[14]
Jayasankar K, Ray P K, Chaubey A K, et al. Mukherjee. Production of pig iron from red mud waste fines using thermal plasma technology[J]. International Journal of Minerals, Metallurgy and Materials, 2012, 19(8):679.
[14]
Jayasankar K, Ray P K, Chaubey A K, et al. Mukherjee. Production of pig iron from red mud waste fines using thermal plasma technology[J]. International Journal of Minerals, Metallurgy and Materials, 2012, 19(8):679.
2015, Vol. 50 
