Research on Resource Recycling Technology of Concentrated Liquid from High-Salt Mine Wastewater
The concentrated liquid of high-salt mine wastewater was treated by the process of removing silicon precipitation-sodium sulfate three-effect evaporation,freezing crystallization and sodium chloride single-effect evaporation of salt.The results showed that the Na2SO4 produced met the Class Ⅱ salt first-class standard in GB/T 6009-2014"Industrial anhydrous Sodium Sulfate",and the purity was>98%.The produced sodium chloride meets the secondary standard of refined industrial salt and industrial dry salt in GB/T 5462-2015"Industrial Salt"standard,with a purity of>97.5%.The process can complete the last step of resource utilization of high salt mine wastewater with relatively high concentration of inorganic impurities and sulfate,and effectively ensure the quality of by-products.
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维普
