某低品位菱锰矿硫酸浸出—金属离子杂质脱除试验研究  

Research of Metal Ions Impurities Removing and Sulfuric Acid Leach of a Low-grade Rhodochrosite

作　　者：包玺琳[1] 李国栋[1] 巩明辉[1] 

机构地区：[1]西北矿冶研究院,甘肃白银730900

出　　处：《金属矿山》2017年第12期54-57,共4页Metal Mine

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。In order to determine the optimal development and utilization process of the low-grade rhodochrosite, the process of sulfuric acid leaching and metal ions impurities removal was studied,with the wet magnetic concentrate from a low-grade rhodochrosite in Guangxi province as raw material （the grade of Mn 18. 98%,and the 90. 31% of Mn existing in form of manganese carbonate） . The result indicates that：①under the suitable condition of the sulfuric acid leaching for the sample in-cluding acid-ore ratio of 0. 8,liquid-solid ratio of 8 mL/g at room temperature for 60 min,Mn leaching ratio reached 93. 02%.②the impurities of metal ions which is contained in leaching liquid can be removed by hydrolytic precipitation and sulfide pre-cipitation methods. In the process of hydrolytic precipitation,when the dosage of MnO2 ,the oxidant for removing Fe2＋,is 3 g/L, and adjusting the ore pulp at pH=5. 2～5. 5,then precipitating for 30 min at the normal temperature,the Fe removal ratio is 99. 98%. In the sulfide precipitation process,when the concentration of S2-is 5×10-3 mol/L,precipitating for 50 min under the normal temperature at pH=5. 2,the concentrate of other irons especially the Ni2＋ is decreased below to 1mg/L.

关 键 词：低品位菱锰矿 酸浸 除杂 

分 类 号：TD925.6[矿业工程—选矿]