For each of the presented schemes done:
Based on the SWOT analysis, it was found that the most effective scheme is No. 3, which has not only the minimum payback period, but also has a number of advantages over acid analogues, in particular:
Scheme with sintering of synnyrites with limestone and subsequent sulphate leaching. Microcline decomposition is carried out by sintering with limestone. Leaching with sulfuric acid makes it possible to obtain solutions of potassium and aluminum sulfate, from which alum is further precipitated, followed by their decomposition into Al2O3 (alumina) and K2SO4 (potassium sulfate).
Scheme with sintering synnyrites with limestone and subsequent leaching of potassium and aluminum with alkaline circulating solutions. The technology involves the production of K2CO3 (potash) and Al2O3 (alumina).