摘要
现代湿法炼锌中所用的原料大部分是含铁量高的闪锌矿,现有工艺条件下则会生成铁酸锌造成锌的溶出率降低和铁的流失。针对这一情况提出的新工艺为在还原焙烧前,先对锌焙砂进行磁选,后期再进行低酸浸出。最后得出铁的总回收率达到92%以上,同时回收的铁品位可以达到52-54%之间。此外还确定了还确定了这套工艺中的各项指标:焙烧温度800℃、时间60min、磁选的粒度为450目左右,浸出时间60min、温度35-40℃。
Most modern materials used in zinc hydrometallurgy are high iron sphalerite. Existing conditions will reduce the dissolution rate and the iron loss caused by zinc zinc ferrite. In view of this situation, the new technology is that before the reduction roasting, the zinc roasted sand is magnetic separation, and then carries out low acid leaching. The total recovery rate of iron finally reached more than 92%,and the recovery of iron grade can reach 52-54%. In addition, the various indexes of the process are determined, the roasting temperature is800℃, the time 35-40 min, the particle size of the magnetic separation is about 400 mesh, 60 min leaching time, temperature of 35-40℃.
出处
《价值工程》
2017年第4期75-77,共3页
Value Engineering
关键词
湿法炼锌
铁酸锌
回收铁
磁选
新工艺
zinc hydrometallurgy
zinc ferrite
recovery of iron
magnetic separation
new process
