某低品位菱锰矿硫酸浸出—金属离子杂质脱除试验研究

发布时间：2019-02-18 08:45

【摘要】：为确定低品位菱锰矿石资源的合理开发利用工艺,以广西某贫菱锰矿石湿式磁选精矿(锰含量为18.98%,90.31%的锰以碳酸锰形式存在)为原料,进行了硫酸酸浸—金属阳离子杂质脱除工艺研究。结果表明:(1)试样硫酸浸出的适宜条件为酸矿比0.8,液固比8 m L/g,常温下浸出60 min,锰浸出率为93.02%。(2)浸出液中的金属离子杂质可通过水解沉淀和硫化沉淀方法去除。水解沉淀部分Fe2+氧化剂Mn O2加入量为3 g/L时,调矿浆pH=5.2~5.5,常温下沉淀30 min,铁脱除率达99.98%。硫化沉淀部分的S2-浓度为5×10-3mol/L,pH=5.2,常温沉淀50min时,以Ni2+为代表的其他离子浓度可降至1 mg/L以下。
[Abstract]:In order to determine the reasonable exploitation and utilization process of low-grade manganite ore resources, the wet magnetic separation concentrate of a low-grade rhombohedral ore in Guangxi was used as raw material, in which the manganese content of 18.98% and 90.31% existed in the form of manganese carbonate. Acid leaching of sulfuric acid and removal of metal cationic impurity were studied. The results showed that: (1) the optimum conditions for sulfuric acid leaching were as follows: acid ore ratio 0.8, liquid-solid ratio 8 mL / g, leaching time 60 min, at room temperature. The leaching rate of manganese is 93.02%. (2) the impurity of metal ions in the leaching solution can be removed by hydrolytic precipitation and sulphide precipitation. When the amount of Mn O 2 was 3 g / L, the removal rate of iron reached 99.98% at room temperature for 30 min, precipitation of modified pulp pH=5.2~5.5,. The concentration of S2- in the sulphide precipitation part is 5 脳 10-3 mol / L ~ (-1). When 50min is precipitated at room temperature, the concentration of other ions represented by Ni2 can be reduced to less than 1 mg/L.
【作者单位】：西北矿冶研究院;
【分类号】：TD951

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