| 摘要 |
FIELD: non-ferrous metallurgy, processing of manganese-containing materials, namely hydraulic metallurgical processing of mixed manganese-containing materials or similar manganese ores for obtaining manganese concentrate possibly used in metallurgical, electrical engineering, chemical industry branches. ^ SUBSTANCE: method comprises steps of converting manganese and related impurities to solution by two-stage treatment of initial manganese containing material with mineral acid. At first stage hydrochloric or sulfuric acid is used for treatment. At second stage hydrochloric acid is used for treating insoluble residue at relation of acid concentration for first stage to its concentration for second stage 1 : (1.0 - 6.6) and simultaneously providing absorption of separated chlorine by alkali solution. After second treatment stage pH of pulp is reduced till 3.5 - 4.5 due to adding carbonate manganese ore. Manganese salt solution is separated from deposit of impurities by filtering. Manganese concentrate is extracted out of filtrate by mixing solution of its salt with solution after chlorine absorption for setting pH 9.5 - 10.5. Value pH is corrected, if necessary by means of milk of lime or sodium hydroxide solution containing excess of sodium chloride. Then concentrate is filtered, washed and dried. Produced manganese concentrate contains at least 60 % of manganese and phosphorus no more than 0.08%. Extraction degree of manganese to concentrate is no less than 92.8%. Invention provides possibility of producing for one technological cycle manganese concentrate including at least 60 % of manganese and no more than 3% of impurities from manganese-containing materials containing manganese less than 30 % and phosphorus 0.1 - 1.0. ^ EFFECT: enhanced efficiency of method. ^ 4 cl, 2 tbl, 5 ex |
