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在本次研究中,对位于土耳其贝伊利卡赫尔稀土矿的湿法冶金评价进行了试验考查。该稀土包含在氟碳铈矿物中,其富集度为10.2%。矿石中的其它成份是CaF_2(52.5%)、BaSO_4(25.4%)、CaCO_3(2.8%),还有少量的ThO_2、Al_2O_3、Fe_2O_3、MnO以及SiO_2。氟碳铈矿物以萤石和重晶石颗粒间的胶结料或者与这些矿物紧密共生的形式存在。稀土元素(REE)在亚筛粒度(微粒级)得到明显富集。为了从矿石中或者由摩擦擦洗和旋流器脱泥得到的预选精矿中提取REE,采用了不同的冶金方法。这些方法是:i、矿样在较稀的H_2SO_4、HCl和HNO_3溶液中浸出;ii、矿石的H_2SO_4处理继之以水浸;iii、用H_2SO_4混合矿石或者预选精矿后,在约200℃温度情况下对混合物进行焙烧,接着对焙烧产品用水浸出。
In this study, we conducted a pilot study on the hydrometallurgical evaluation of the Beilikarhir rare earth mine in Turkey. The rare earth is contained in bastnaesite minerals and has a concentration of 10.2%. The other components in the ore are CaF 2 (52.5%), BaSO 4 (25.4%), CaCO 3 (2.8%), and a small amount of ThO 2, Al 2 O 3, Fe 2 O 3, MnO and SiO 2. Bastnasite minerals exist as a cementitious material between fluorite and barite particles or in close co-occurrence with these minerals. REEs are significantly enriched in sub-sieve size (particle size). Different metallurgical methods have been used for the extraction of REEs from pre-selected concentrates from ores or from sludge scrubs and cyclones. These methods are: i. Leaching of ore samples in dilute solutions of H 2 SO 4, HCl and HNO 3; ii) treatment of ores with H 2 SO 4 followed by flooding; iii. Mixing of ores with H 2 SO 4 or preselection of concentrates at a temperature of about 200 ° C. The mixture is calcined and then the calcined product is leached with water.