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1. 发明公开

EP3108023A1 PROCESS FOR REDUCING THE AMOUNTS OF ZINC (ZN) AND LEAD (PB) IN MATERIALS CONTAINING IRON (FE) 有权
标题翻译： VERFAHREN ZUR VERMINDERUNG DER MENGEN VON ZINK（ZN）UND BLEI（PB）in MATERIALIEN MIT EISEN（FE）
公开(公告)号：EP3108023A1
公开(公告)日：2016-12-28
申请号：EP15704543.6
申请日：2015-02-13
申请人： Paul Wurth S.A.
发明人： PIEZANOWSKI, Ludivine , HUGENTOBLER, Jasmin , RAYNAL, Samuel , HOUBART, Michel
IPC分类号： C22B7/00 , C22B7/02 , C22B3/00 , C22B19/00
CPC分类号： C22B7/02 , C22B7/007 , C22B13/045 , C22B19/00 , C22B19/22 , Y02P10/214 , Y02P10/232 , Y02P10/234
摘要： The present invention relates to a process for reducing the amounts of zinc and lead in starting materials comprising iron which comprises the steps of: —selectively leaching Zn and Pb comprised in the starting materials by mixing the starting materials with hydrochloric acid and an oxidizing agent comprising at least 5 wt-% of manganese dioxide in one or several reactor(s) at a temperature superior or equal to 35° C. and at a p H comprised between 0.5 and 3.5, —filtrating the mixture obtained in order to separate the solid and the filtrate, —washing the solid with water, the resulting solid comprising mainly Fe, a reduced amount of Zn and Pb compared to the original starting materials, —recovering the filtrate of step b) and the washing water of step c) which comprise chloride, solubilized Zn and Pb in one or several reactor(s), —precipitating solubilized Zn, Pb in the recovered filtrate and the washing water by mixing with a neutralizing agent, —filtrating and washing the solid residues obtained in step e) in order to remove the chloride from the solid residues which comprise at least Pb and Zn. The present invention also refers to the use of the materials obtained after treatment in a in a sinter plant and blast furnace or in all pyrometallurgical furnace which value iron such as electrical arc furnace (EAF), cupola furnace, oxycup furnace, submerged arc furnace (SAF), a plasma furnace, rotary hearth furnace.
摘要翻译：本发明涉及一种减少含铁原料的锌和铅含量的方法，该方法包括以下步骤： - 通过将原料与盐酸和氧化剂混合来选择性地浸出原料中所含的Zn和Pb，该方法包括在一个或多个反应器中，在高于或等于35℃的温度下和至少5分钟时，至少5重量％的二氧化锰在0.5和3.5之间，渗透所得的混合物以分离固体和滤液，用水洗涤固体，所得固体主要包含Fe，与原始原料相比减少量的Zn和Pb， - 回收步骤b）的滤液和包含氯化物的步骤c）的洗涤水，在一个或几个反应器中溶解Zn和Pb，通过与中和剂混合，将回收的滤液和洗涤水中的溶解的Zn，Pb沉淀， - 过滤和洗涤 e步骤e）中获得的固体残留物，以便从至少包含Pb和Zn的固体残余物中除去氯化物。本发明还涉及在烧结厂和高炉或所有火电冶金炉中使用经过处理后得到的材料，其中铁如电弧炉（EAF），冲天炉，氧化炉，埋弧炉（ SAF），等离子炉，转底炉。

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