Studying on the process mineralogy and existing state of lithium in bauxite ore from Mianchi district, Henan province

In order to uncovered the ore composition, distribution characteristics and occurrence status of lithium in the bauxite ore from mianchi district, Henan province, and lay a foundation for comprehensive development and utilization, this study focused on the process mineralogy characteristics of Lithium-bearing bauxite ore. The results showed as follows: The lithium-bearing bauxite has a silicon-aluminum ratio(A/S) of 2.6 with Al2O3 content of 54.8%. Lithium in the bauxite ores and clay rock layers has recovery value. The ore mainly composed of diaspora and clay minerals such as kaolinite and illite. The diaspora and clay minerals are conducive to enrichment or selection for their tiny, and occurred as aggregate. By means of dilute acid analysis, beneficiation test and electron probe, this study found Lithium occurs mainly in crystalized state in clay minerals, ore dressing method can enrich lithium to the grade about 0.57%, and tailings are the main objects of lithium comprehensive recycling during the bauxite ore dressing and smelting.