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2. 发明公开

EP2565284A4 METHOD FOR EXTRACTING GALLIUM FROM FLY ASH 有权
标题翻译： VERFAHREN ZUR EXTRAKTION VON GALLIUM AUS FLUGASCHE
公开(公告)号：EP2565284A4
公开(公告)日：2014-09-17
申请号：EP11774394
申请日：2011-04-27
申请人： CHINA SHENHUA ENERGY CO LTD
发明人： LING WEN , JIANG YINSHAN , WEI CUNDI , LI NAN , GU DAZHAO , GUO ZHAOHUA , YANG DIANFAN , CHI JUNZHOU , ZOU PING
IPC分类号： C22B58/00 , C22B3/24 , C25C1/22
CPC分类号： C25C1/22 , B03C1/03 , B03C1/032 , B03C1/0335 , B03C2201/18 , C22B3/10 , C22B3/42 , C22B3/44 , C22B7/007 , C22B7/02 , C22B58/00 , Y02P10/234
摘要： Disclosed is a method for extracting gallium from fly ash, which comprises the following steps: crushing the fly ash and removing Fe by magnetic separation; then dissolving it by using hydrochloride acid (2) to obtain hydrochloric acid leachate; adsorbing gallium in the hydrochloric acid leachate with macro-porous cationic resin, followed by eluting to obtain the eluent (5) containing gallium; adding sodium hydroxide (6) solution into the eluent containing gallium to react and obtaining sodium metaaluminate solution containing gallium (8); introducing CO 2 into the sodium metaaluminate solution containing gallium (8) for carbonation, followed by separating gallium from aluminum and obtaining aluminum-gallium double salt (15) with the gallium to alumina mass ratio being more than 1:340; adding the aluminum-gallium double salt (15) into sodium hydroxide (17) to react, followed by alkalinity-adjustment concentration to obtain alkali solution containing gallium and aluminum; electrolyzing (10) the alkali solution containing gallium and aluminum to obtain metal gallium (11). The method simplifies the process and improves extraction efficiency of gallium.
摘要翻译：公开了一种从粉煤灰中提取镓的方法，包括以下步骤：粉碎飞灰并通过磁力分离除去Fe; 然后用盐酸（2）溶解得到盐酸浸出液; 用大孔阳离子树脂将镓吸附在盐酸浸出液中，然后洗脱得到含有镓的洗脱剂（5）; 向含镓镓的洗脱液中加入氢氧化钠（6）溶液进行反应，得到含有镓（8）的偏铝酸钠溶液; 将二氧化碳引入含镓（8）碳酸钙的偏铝酸钠溶液中，然后从铝中分离镓，得到镓与铝的双重盐（15），镓与氧化铝的质量比大于1:340; 将铝 - 镓复合盐（15）加入氢氧化钠（17）中进行反应，然后进行碱度调节浓度，得到含镓和铝的碱溶液; 电解（10）含有镓和铝的碱溶液以获得金属镓（11）。该方法简化了工艺，提高了镓的提取效率。

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