摘要
对某稀土湿法冶炼工艺进行了清洁生产工艺方案研究。结果表明,精矿REO浸取率由90％提高到97％;从酸浸废液中年回收硫酸亚铁3000t;从碱转废液中年回收硫酸钠3000t;废水中氟回收率86％;生产废水排放量削减58％;废水污泥量削减90％;直接经济效益年200万元以上。
In the paper, cleaner production has been adopted to the technological transformation of rare earths hydrosmelting, the results showed that the extraction of rare earths was raised from 90% to 97%; reuse 3000t/a FeSO4· 7H,O from acid wastewater; reuse 3000t/a Na2SO4 from alkaline wastewater; F- could be recovered at the rate of 86%; the amount of wastewater can be reduced by 58% and of sludge could be reduced by 90% and the economical benefits could reach above 2 million yuan.
出处
《上海环境科学》
CAS
CSCD
1999年第3期121-122,共2页
Shanghai Environmental Sciences
关键词
清洁生产
稀土金属
湿法冶炼
Hydro-rare earths Cleaner production Reducing waste and increasing value
