盐酸羟胺-盐酸浸取氧化锰矿中锰

发布时间：2019-08-17 20:19

【摘要】：氧化锰是锰矿石中最主要的一类矿物,也是锰矿石在工业上应用最为广泛的一类矿物。但是目前对锰矿石中氧化锰的研究仅局限于某一矿区的特定矿物,不能涵盖我国大部分矿区的众多氧化锰矿物。实验选择了不同矿区、不同种类的氧化锰矿石,从中挑选出软锰矿、水锰矿、褐锰矿的单矿物,分别加入了盐酸羟胺-盐酸、草酸-硫酸、亚硫酸(H_2SO_3)、硫酸-氢氟酸-氟化钾(H_2SO_4-HF-KF)和偏磷酸(HPO_3)共5种浸取剂,只有盐酸羟胺-盐酸的浸取率均达到了98%以上,适用于实验用的所有单矿物。为进一步确定最佳浸取条件,选择了10min~1.5h浸取时间、5~40g/L盐酸羟胺溶液和HCl(0.2+99.8)~(3+97)的酸度(也就是HCl的体积分数范围为0.2%~3%)分别进行了3种单矿物试验,结果发现在30min~1.5h之间,不低于20g/L盐酸羟胺溶液和不低于HCl(1+99)的酸度(即HCl的体积分数不小于1%)的条件下,3种单矿物的浸出率均达到99.5%以上。考虑到原矿石的复杂情况,最终确定了向氧化锰矿石中加入50mL 20g/L盐酸羟胺-盐酸(1+99),在沸水浴条件下浸取1.0h,使Mn~(3+)和Mn~(4+)还原到Mn~(2+)从而破坏其原本的矿物结构后将锰解析出来,过滤后用电感耦合等离子体原子发射光谱(ICP-AES)测定溶液中锰含量的方法。锰的检出限为0.7μg/g,方法适用于我国大部分矿区的众多氧化锰矿物。按照实验方法测定锰矿石原矿样品,测定结果的相对标准偏差(RSD,n=12)为0.39%和1.1%,对锰矿石原矿样品的单矿物加标回收率在99.7%~102.3%之间。
[Abstract]:Manganese oxide is the most important mineral in manganese ore, and it is also the most widely used mineral in industry. However, at present, the research on manganese oxide in manganese ore is limited to the specific minerals in a certain mining area, and can not cover many manganese oxide minerals in most mining areas in China. In the experiment, different kinds of manganese oxide ores were selected from different mining areas, and the single minerals of pyrolusite, water manganese ore and brown manganese ore were selected. Five leaching agents, hydroxyamine hydrochloric acid, oxalic acid sulfuric acid, sulfite (H_2SO_3), sulfuric acid hydrofluoric acid potassium fluoride (H_2SO_4-HF-KF) and metaphosphoric acid (HPO_3), were added respectively. Only the extraction rate of hydroxyamine hydrochloric acid was over 98%. Suitable for all single minerals used in the experiment. In order to further determine the optimum leaching conditions, the extraction time of 10min~1.5h, the acidity of 5~40g/L hydroxyamine hydrochloric acid solution and HCl (0.299.8) ~ (397) (that is, the volume fraction range of HCl is 0.2% 鈮，

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