|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alumina & Bauxite
||Experimental Investigation on Desiliconization of Low-grade Bauxite by Flotation Process
||Guihong Han, Hongyang Wu, Wenjuan Wang, Yanfang Huang, Yanfang Huang
|On-Site Speaker (Planned)
Low-grade bauxite resources are abundant in China . However, the high content of silica can not meet the production requirments of alumina. With diasporic high-silica bauxite from Henan province as experimental ore samples, sodium oleate as collector and humic acid as depressant, desiliconization experiments were conducted during the process of one roughing-one cleaning direct flotation in this work. The effects of flotation parameters on the alumina-silica ratio (A/S) and Al2O3 content were investigated. The optimum conditions for roughing stage are obtained as follows: humic acid dosage of 20 g/t, sodium oleate dosage of 700 g/t, particle size (content of particels below 0.074 mm) of 85 %, pH 9.0. And the dosage of humic acid and sodium oleate for cleaning-stage was a third of that in roughing-stage. The alumina content in the concentrate increases from 58.91 % to 65.05 %,while A/S rises from 3.27 to 7.97. This research can provid a promising application of low-grade bauxite for alumina production.
||Planned: Light Metals