锰阳极泥的工艺矿物学及杂质的脱除研究

INVESTIGATION ON PROCESS MINERALOGY OF MANGANESE ANODE SLIME AND IMPURITY REMOVAL

用电解法生产金属锰的阳极区总有占总锰量的20%～25%的锰阳极泥产出,目前这部分物料不能简单地直接返回电解槽中使用而只能堆存或廉价销售.本工作对产自某厂的锰阳极泥进行了工艺矿物学研究,查明了杂质的形态,并对除杂工艺进行了探讨.所获结果表明:杂质Pb、Sn、S皆不可避免地由电解系统(阳级及电解液)产生且不可能用简单的机械选矿方法除去;该物料1050～1100℃下还原挥发脱出绝大部分杂质后即可作为生产金属锰及其合金的优质原料.本研究为锰阳极泥的处理和利用提供了新的信息.

A large quantity of Mn, which may take 20 % ～25 % of the total Mn volume,is reported to anode slime in the anode area during the manganese production with electrolytic technology. At present, this part of material can not be utilized by directly returning it into electrolytic cell, and can only be left for storage or market at a low price. The process mineralogical investigation on the manganese anode slime taking from a plant has been carried out, so as to reveal the impurity occurring forms and to make a technical proposal to remove the impurities. The results obtained show that the impurities Pb,Sn, and S in slime are produced in the electrolytic system （anode material and electrolyte）, it can not be removed just with simple mineral processing, and if the process of reduction-volatilization roasting under the temperature of 1050～ 1100℃ is employed large amount of the impurities can be eliminated, leaving the material qualified for the production of metal manganese and its alloys. This study offers some new information of the processing and utilization of the manganese anode slime.