The Sintering and Leaching of Low-Grade Diasporic Bauxite by the Improved Lime-Sintering Process

Hai Yan Yu; Xiao Lin Pan; Kai Wei Dong; Wu Zhang; Shi Wen Bi

doi:10.4028/www.scientific.net/AMR.616-618.1051

Paper Titles

Application of Temporary Plugging-Acidulation Technology in Low Permeability and Inhomogeneous Reservoirs
p.1027

Application on Expert System to Predict the Effect of Fracturing Measures
p.1033

Experimental Study on PFASS Produced from Gangue & its Effect on Waste Water in Oil Field
p.1038

Biomarker Geochemistry and Hydrocarbon Generation Potential of the Evaporites in Dongying Lacustrine Basin
p.1042

The Sintering and Leaching of Low-Grade Diasporic Bauxite by the Improved Lime-Sintering Process
p.1051

Computational Investigation of the Multiphase Flow Behavior in Ironmaking Blast Furnace
p.1055

Comparative Study on the Cyclic Corrosion Test of Rail Steel U68CuCr and U75V
p.1059

Corrosion Behavior of Zinc under the Combined Layer of Electrolyte
p.1063

The Floating Removal of Non-Metallic Inclusions in Steel
p.1068

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 616-618The Sintering and Leaching of Low-Grade Diasporic...

The Sintering and Leaching of Low-Grade Diasporic Bauxite by the Improved Lime-Sintering Process

Abstract:

An improved lime-sintering process was developed to produce alumina from low-grade diasporic bauxite in this paper. Both clinkers sintered by the real bauxite and simulated bauxite at 1350 °C when the molar ratio of CaO to Al₂O₃ decreased to 1.4 were produced, the alumina leaching rates of which reached over 90% in sodium carbonate liquor. The main phases in the clinkers after sintering are 12CaO•7Al₂O₃, γ-2CaO•SiO₂ and 2CaO•Fe₂O₃. Addition of alkali can decrease the C/A ratio and get a high alumina leaching rate of clinker.