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Method for comprehensively utilizing silicon-manganese alloy fly ash and waste acid to produce battery-grade manganese sulfate
The invention discloses a method for comprehensively utilizing silicon-manganese alloy fly ash and waste acid to produce battery-grade manganese sulfate . The method comprises the following steps: washing low-grade silicon-manganese alloy fly ash with dilute sulfuric acid having a concentration of 20%; removing slag to obtain a sulfate solution, wherein the sulfate comprises manganese sulfate, calcium sulfate, aluminum sulfate and magnesium sulfate; adjusting the concentrations of calcium sulfate, aluminum sulfate and magnesium sulfate in the sulfate solution so as to allow calcium sulfate, aluminum sulfate and magnesium sulfate to generate calcium-magnesium alum coprecipitate; adding a certain amount of manganese powder; and separating calcium-magnesium alum to obtain a manganese sulfatesolution, and crystallizing the obtained manganese sulfate solution at a high temperature; and separating crystals so as to obtain manganese sulfate. According to the method, the waste dilute sulfuricacid is used for treating the silicon-manganese alloy fly ash, so the manganese element in the silicon-manganese alloy fly ash can be effectively recycled, and the waste dilute sulfuric acid can be effectively utilized; the calcium-magnesium alum can be used as a raw material of a cement plant, so effective recycling and reusing of resources are achieved; and the manganese sulfate solution is purified through two reactions including coprecipitation and replacement, so high-purity manganese sulfate is obtained.
一种硅锰合金除尘灰综合利用与废酸生产电池级硫酸锰的方法，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，所述硫酸盐包括硫酸锰、硫酸钙、硫酸铝、硫酸镁，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，得到硫酸锰溶液，将得到的硫酸锰溶液高温结晶，并分离结晶物，得到硫酸锰，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，还能有效再利用废稀硫酸，钙镁矾可作为水泥厂原料，实现了资源的有效回收和再利用，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。
Method for comprehensively utilizing silicon-manganese alloy fly ash and waste acid to produce battery-grade manganese sulfate
The invention discloses a method for comprehensively utilizing silicon-manganese alloy fly ash and waste acid to produce battery-grade manganese sulfate . The method comprises the following steps: washing low-grade silicon-manganese alloy fly ash with dilute sulfuric acid having a concentration of 20%; removing slag to obtain a sulfate solution, wherein the sulfate comprises manganese sulfate, calcium sulfate, aluminum sulfate and magnesium sulfate; adjusting the concentrations of calcium sulfate, aluminum sulfate and magnesium sulfate in the sulfate solution so as to allow calcium sulfate, aluminum sulfate and magnesium sulfate to generate calcium-magnesium alum coprecipitate; adding a certain amount of manganese powder; and separating calcium-magnesium alum to obtain a manganese sulfatesolution, and crystallizing the obtained manganese sulfate solution at a high temperature; and separating crystals so as to obtain manganese sulfate. According to the method, the waste dilute sulfuricacid is used for treating the silicon-manganese alloy fly ash, so the manganese element in the silicon-manganese alloy fly ash can be effectively recycled, and the waste dilute sulfuric acid can be effectively utilized; the calcium-magnesium alum can be used as a raw material of a cement plant, so effective recycling and reusing of resources are achieved; and the manganese sulfate solution is purified through two reactions including coprecipitation and replacement, so high-purity manganese sulfate is obtained.
一种硅锰合金除尘灰综合利用与废酸生产电池级硫酸锰的方法，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，所述硫酸盐包括硫酸锰、硫酸钙、硫酸铝、硫酸镁，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，得到硫酸锰溶液，将得到的硫酸锰溶液高温结晶，并分离结晶物，得到硫酸锰，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，还能有效再利用废稀硫酸，钙镁矾可作为水泥厂原料，实现了资源的有效回收和再利用，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。
Method for comprehensively utilizing silicon-manganese alloy fly ash and waste acid to produce battery-grade manganese sulfate
硅锰合金除尘灰综合利用与废酸生产电池级硫酸锰的方法
YU JINSHENG (author) / YU GUO'AN (author) / WANG RUI (author)
2020-07-17
Patent
Electronic Resource
Chinese
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