Flotation Desulfurization of High-Sulfur Bauxite with Ethyl Thio Carbamate as Collector

Abstract

The desulfurization of high-sulfur diasporic bauxite （from China） with flotation process and ethyl thio carbamate as collector was studied, and the effects of flotation time, pulp density, pH value and particle size of ores were examined. The experimental results indicate that the sulfur in bauxite was successfully decreased through flotation. The sulfur content of bauxite was lowed to 0.66% under the condition of pH value 4, the dose of flotation agent ethyl thio carbamate 0.5kg/t, frother 20g/t, flotation time 15 minutes, pulp density 10%, the particle size of ores ≦0.09 mm, and the reclamation of Al2O3is 90.16% as well. The flotation kinetics of flotation desulfurization was also studied.

Study on preparation and properties of supported compound desulfurizer for Bayer dissolution

“…Therefore, the biggest problem in making full use of the existing high quality high sulfur bauxite resources is how to desulfurize. Aiming at the difficult problem of desulfurization in the process of alumina production, scholars at home and abroad have carried out a large number of in-depth studies [5,6]. At present, the commonly used desulfurization technology includes the flotation desulphurization, wet process desulfurization, roasting pretreatment desulfurization and adding reducing agent sintering desulphurization [7].…”