首页>
外国专利>
HYDROMETALLURGICAL METHOD FOR RECOVERING ZINC IN A SULPHURIC MEDIUM FROM ZINC SULPHIDE CONCENTRATES HAVING A HIGH IRON CONTENT
HYDROMETALLURGICAL METHOD FOR RECOVERING ZINC IN A SULPHURIC MEDIUM FROM ZINC SULPHIDE CONCENTRATES HAVING A HIGH IRON CONTENT
展开▼
机译:水铁法从高铁含量的硫化锌精矿中回收硫化介质中的锌
展开▼
页面导航
摘要
著录项
相似文献
摘要
This method is based in the recirculation of an iron free solution or a solution with low iron content in such a manner that the final acidity conditions obtained are ideal for iron to efficiently precipitate as jarosite. In a variation of the invention the zinc concentrate is subjected to the following stages: a. Roasting of at least part of the zinc concentrate. b. Neutral leaching where zinc oxide is dissolved. c. Acid leaching where zinc ferrites are leached. d. Reduction of the Fe +++ contained in the solution to Fe ++ by adding zinc concentrate and diluting it with a zinc sulphate solution resulting from stage (f) to lower the concentration of Fe ++ . e. Neutralizing the acidity in the solution with calcine. h. Iron oxidation and jarosite precipitation, free of contaminating solids, by means of the injection of oxygen or oxygen-enriched air and the addition of an alkali or a Na + o NH4 + salt.
展开▼
机译:该方法基于无铁溶液或铁含量低的溶液的再循环,使得最终的酸度条件非常适合铁有效地沉淀为黄钾铁矾。在本发明的一个变型中,锌精矿经历以下阶段:一种。焙烧至少一部分锌精矿。b。中性浸出,氧化锌溶解。C。酸浸,浸出铁酸锌。d。通过添加锌精矿并用阶段(f)所得的硫酸锌溶液稀释将溶液中所含的Fe +++还原为Fe ++,以降低Fe ++的浓度。e。用煅烧酸中和溶液中的酸度。H。通过注入氧气或富氧空气并添加碱或Na + o NH4 +盐,可以进行铁的氧化和黄钾铁矾沉淀,不含污染性固体。
展开▼