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Process for preparing battery-grade manganese oxide and byproduct sulfuric acid by roasting high-purity manganese sulfate and sulfur
The invention discloses a process for preparing battery-grade manganese oxide and byproduct sulfuric acid by roasting high-purity manganese sulfate and sulfur. The process comprises the steps: washingthe low-grade silicon-manganese alloy fly ash with 20% dilute sulfuric acid; removing slag to obtain a sulfate solution; adjusting the concentrations of calcium sulfate, aluminum sulfate and magnesium sulfate in the sulfate solution; calcium sulfate, aluminum sulfate and magnesium sulfate are enabled to generate ettringite coprecipitation; adding a certain amount of manganese powder; and separating picromerite, crystallizing the obtained manganese sulfate solution at high temperature; and separating crystals, drying the obtained manganese sulfate, burning together with sulfur in an oxygen atmosphere and obtaining manganese monoxide and sulfur dioxide. According to the method, the waste dilute sulfuric acid is used for treating the silicon-manganese alloy fly ash, manganese in the silicon-manganese alloy fly ash can be effectively recycled to prepare manganese monoxide and byproduct sulfuric acid, the manganese sulfate solution is purified through two reactions of coprecipitation and replacement to obtain high-purity manganese sulfate, manganese sulfate and sulfur are combusted in an oxygen atmosphere together, manganese monoxide can be directly generated, and extra heat energy consumption is not needed.
一种高纯硫酸锰与硫磺焙烧制备电池级氧化锰与附产硫酸工艺，用20%的稀硫酸洗涤低品位硅锰合金除尘灰，除渣后得到硫酸盐溶液，调节硫酸盐溶液中硫酸钙、硫酸铝、硫酸镁的浓度，以使硫酸钙、硫酸铝、硫酸镁生成钙镁矾共沉淀，然后加入一定量的锰粉，并分离钙镁矾，将得到的硫酸锰溶液高温结晶，并分离结晶物，将得到的硫酸锰干燥后，与硫磺一起在氧气气氛中燃烧，得到一氧化锰和二氧化硫，本发明方法利用废稀硫酸处理硅锰合金除尘灰，能有效回收硅锰合金除尘灰中的锰元素制取一氧化锰与附产硫酸，通过共沉淀和置换两种反应来提纯硫酸锰溶液，得到高纯硫酸锰，利用硫酸锰与硫磺一起在氧气气氛中燃烧，能直接生成一氧化锰，不必额外消耗热能。
Process for preparing battery-grade manganese oxide and byproduct sulfuric acid by roasting high-purity manganese sulfate and sulfur
The invention discloses a process for preparing battery-grade manganese oxide and byproduct sulfuric acid by roasting high-purity manganese sulfate and sulfur. The process comprises the steps: washingthe low-grade silicon-manganese alloy fly ash with 20% dilute sulfuric acid; removing slag to obtain a sulfate solution; adjusting the concentrations of calcium sulfate, aluminum sulfate and magnesium sulfate in the sulfate solution; calcium sulfate, aluminum sulfate and magnesium sulfate are enabled to generate ettringite coprecipitation; adding a certain amount of manganese powder; and separating picromerite, crystallizing the obtained manganese sulfate solution at high temperature; and separating crystals, drying the obtained manganese sulfate, burning together with sulfur in an oxygen atmosphere and obtaining manganese monoxide and sulfur dioxide. According to the method, the waste dilute sulfuric acid is used for treating the silicon-manganese alloy fly ash, manganese in the silicon-manganese alloy fly ash can be effectively recycled to prepare manganese monoxide and byproduct sulfuric acid, the manganese sulfate solution is purified through two reactions of coprecipitation and replacement to obtain high-purity manganese sulfate, manganese sulfate and sulfur are combusted in an oxygen atmosphere together, manganese monoxide can be directly generated, and extra heat energy consumption is not needed.
一种高纯硫酸锰与硫磺焙烧制备电池级氧化锰与附产硫酸工艺，用20%的稀硫酸洗涤低品位硅锰合金除尘灰，除渣后得到硫酸盐溶液，调节硫酸盐溶液中硫酸钙、硫酸铝、硫酸镁的浓度，以使硫酸钙、硫酸铝、硫酸镁生成钙镁矾共沉淀，然后加入一定量的锰粉，并分离钙镁矾，将得到的硫酸锰溶液高温结晶，并分离结晶物，将得到的硫酸锰干燥后，与硫磺一起在氧气气氛中燃烧，得到一氧化锰和二氧化硫，本发明方法利用废稀硫酸处理硅锰合金除尘灰，能有效回收硅锰合金除尘灰中的锰元素制取一氧化锰与附产硫酸，通过共沉淀和置换两种反应来提纯硫酸锰溶液，得到高纯硫酸锰，利用硫酸锰与硫磺一起在氧气气氛中燃烧，能直接生成一氧化锰，不必额外消耗热能。
Process for preparing battery-grade manganese oxide and byproduct sulfuric acid by roasting high-purity manganese sulfate and sulfur
高纯硫酸锰与硫磺焙烧制备电池级氧化锰与附产硫酸工艺
YU JINSHENG (Autor:in) / YU GUO'AN (Autor:in) / ZHANG YAN (Autor:in)
24.07.2020
Patent
Elektronische Ressource
Chinesisch
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