INVESTIGATION OF A LITHIUM CHLORIDE EXTRACTION PROCESS FROM HYDROMINERAL RAW MATERIAL

Abstract

The purpose of the research is to create technology for processing hydromineral raw material to produce lithium salts and rare earth elements, to develop a highly efficient technology for products of lithium, lithium compounds and rare earth elements of the Aral region of Kazakhstan.The chemical and mineralogical compositions of hydromineral raw material of the Aral region lakes have been studied by method of precipitation. The conditions for obtainment of lithium concentrates have been studied. Conditions for lithium minerals concentration and production of concentrates for lithium chloride extraction have been studied.  Purification of lithium concentrates off calcium and magnesium ions and chemical composition of hydromineral raw material, effective methods of lithium precipitation in the form of lithium carbonate, its purification off Ca²⁺, Mg²⁺ impurities by method of precipitation have been studied. The extraction methods for    processing   lithium-containing sediments and sorption methods of lithium extraction from brines have been studied. Water-salt systems have been studied for the directed search of effective methods for obtainment of lithium salts from brine and sediments of salt lakes.