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Information × Registration Number 0302U001063, 0100U005523 , R & D reports Title Development of scientific basis and technology of mineral-salt production hard-soluble waste reclamstion by gasredusing and sulfoscid methods with potash and complex fertilizer production. popup.stage_title Термодинамічні дослідження газовідновної переробки важкорозчинних сульфатних мінералів. Head Kryklyvyj Dmytro Izotovych, Registration Date 18-01-2002 Organization Vinnitsia state teachers pedagogical university popup.description2 According to experimental researches of restoration magnesium sulphate begins in borders 600C at 650 - 750C for 30-40 min the complete restoration of sulphur is reached practically. With education in a firm phase magnesium oxide, and in gas - hidrogen sulphide, sulfur and dioxide of sulfur. The restoration potassium sulphate by natural gas begins at 700C. With increase of temperature in hard phase a mode the speed of process grows. The occurrence of a liquid phase conducts to delay of process. Introduction of the additive МgО or magnesium sulphate in the ratio К2О:МgО = 1:4-6 provides hard phase a mode in an interval 850 - 900 C and in this mode the complete restoration К2SО4 is reached for 30-40 min. In process hydrosulphate of decomposition potassium, magnesium of minerals the interaction of a sulphuric acid with chloride of metals is investigated. The thermodynamic analysis of systems К2SО4- 2МgSО4 - Н2SО4 and К2SО4 - 2МgSО4 - СаSО4 is carried out also. Is established, that at temperatures 298- 450 К, the crystals of such minerals can be destroyed. Perspective, on our sight, there is a research on use hydrosulphate of alkaline metals in technology of reception superphosphate, and sulphate magnesium - in technology of reception silphide of phosphorus. The jobs these will be continued in the long term. Product Description popup.authors popup.nrat_date 2020-04-02 Close