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矿冶:2011,20(4):60-
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从低钴溶液用SO2/O2氧化中和法除铁锰试验研究
(北京矿冶研究总院, 北京100070)
OXIDATIVE PRECIPITION OF IRON AND MANGANESE WITH SO2/O2 AND SEPARATION FROM LOW COBALT SOLUTION
(Beijing General Research Institute of Mining and Metallurgy,Beijing 100070,China)
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投稿时间:2011-07-05    
中文摘要: 通过对低钴溶液的除铁工艺分析,提出采用SO2/O2(空气)混合气氧化中和除铁、锰工艺。研究表明:采用SO2/空气混合气催化氧化中和沉淀除铁是可行的,但彻底除锰有一定的难度,在温度 30 ℃;SO2/空气混合气SO2含量 1.5% ;通气速度 45.43 m3/(h?m3液);沉淀时间 2 h; pH值为3.5的条件下试验,后液含铁小于0.005 g/L,铁的沉淀率大于99.7%,锰的沉淀率为37.05%。在此条件下,再采用深度中和,酸度pH值控制在4.0~4.5,溶液中的铝可降低到0.03 g/L,溶液中的镍、钴的渣计沉淀率分别为0.87%、1.24%。
中文关键词:     二氧化硫  除铁  除锰
Abstract:Through the analysis of processes of iron removal from low cobalt solution, a process of iron and manganese removal by oxidation of SO2/O2 (or air) mixture and neutralizing is proposed. The results show that it is possible to remove the iron, but difficult to remove manganese totally. Under the condition of 30℃, a SO2 1.5 vol% and air mixture feeding rate of 45.43 m3/ (h ? m3 liquor), reaction time of 2h and pH value around 3.5, the iron concentration of the residual liquid is less than 0.005g/L, which means a 99.7% removal of iron is achieved, however the removal ratio of manganese is only 37.5%. Then the residual liquid is further neutralized to pH 4.0-4.5, and the aluminium is reduced to 0.03g/L. Total precipitation rate of nickel and cobalt are 0.87% and 1.24%, respectively throughout the whole process.
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尹 飞,王振文,阮书峰,李 强,王成彦.从低钴溶液用SO2/O2氧化中和法除铁锰试验研究[J].矿冶,2011,20(4):60~.

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