| 摘要 |
neutralization and treatment of sulfuric acid sewage waters of vanadium production for removal of vanadium, manganese, chromium; applicable in various industries for purification of sewage waters from said components. SUBSTANCE: method includes operations of sewage water neutralization and chemical precipitation of vanadium, manganese and chromium compounds by reagents, and subsequent separation and utilization of precipitate. At the first stage, calcium sulfate is precipitated by calcium chloride and separated, while at the second stage, compounds of vanadium, manganese and chromium are neutralized and chemically precipitated by sodium carbonate. EFFECT: concurrent production of well filtered precipitates and utilized technical calcium sulfate and manganese concentrate. 5 cl, 2 tbl, 2 ex
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