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1.发明公开HYDROMETALLURGICAL METHOD FOR RECOVERING ZINC IN A SULPHURIC MEDIUM FROM ZINC SULPHIDE CONCENTRATES HAVING A HIGH IRON CONTENT 审中-公开HYDRO冶金工艺用于在介质中的硫酸硫化锌OBTAINING锌铁含量高精矿
公开(公告)号：EP2730667A4
公开(公告)日：2015-04-29
申请号：EP12852449
申请日：2012-07-16
申请人： TAM 5 S L
CPC分类号： C01G9/02 , C22B19/02 , C22B19/22 , C22B19/26 , Y02P10/234
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.
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2.发明公开HYDROMETALLURGICAL METHOD FOR THE RECOVERY OF ZINC IN A SULPHURIC MEDIUM FROM SULPHUDIC ZINC CONCENTRATES 审中-公开HYDRO冶金过程用于硫化锌精矿中等硫锌OBTAINING
公开(公告)号：EP2543746A4
公开(公告)日：2014-12-03
申请号：EP11861327
申请日：2011-04-15
申请人： TAM 5 S L
CPC分类号： C22B19/22 , C22B19/02 , C22B19/26 , Y02P10/234
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