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Journal of Mining Sciences

2019 year, number 6

Integrated Processing Method for Synnerite with Production of Alumina and Potassium Sulfate

I. G. Antropova, E. N. Alekseeva, A. D. Budaeva
Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, Ulan-Ude, 670047 Russia
Keywords: сыннырит, комплексная переработка, термохимическое активирование, сернокислотное разложение, глинозем, сульфаты калия и магния, Synnerite, integrated processing, thermochemical activation, sulfuric acid decomposition, alumina, potassium and magnesium sulfates


The article presents the research findings obtained in deep integrated processing of rebellious high-potassium aluminum silicates from the Kalyum deposit within the Synnyr alkaline massif-synnerite-with production of alumina as well as potassium and magnesium sulfates. The introduction of magnesium-bearing mineral-dolomite-as an additive at the stage of thermochemical decomposition of the acid-resistant minerals in the initial raw material (K-feldspar group) provides improved efficiency of the processes due to cheapening of baking, increased marketable production and reduced solid waste. It is found that leaching of activated synnerite by 60% sulfuric acid promotes deposition of the silicon component as amorphous silica, which facilitates the further processing of pregnant potassium-, magnesium- and aluminium-bearing sulfuric acid solutions with marketable production.