白钨矿NaOH-SiO_(2)焙烧-水浸高效提取钨

作     者：刘德刚 廖春发 刘元鑫 徐国钻 周锋 何秉轩 梁勇 LIU De-gang;LIAO Chun-fa;LIU Yuan-xin;XU Guo-zuan;ZHOU Feng;HE Bing-xuan;LIANG Yong

作者机构：School of Metallurgical and Chemical EngineeringJiangxi University of Science and TechnologyGanzhou 341000China Chongyi Zhangyuan Tungsten Co.Ltd.Ganzhou 341000China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2023年第30卷第6期

页      面：1856-1864页

核心收录：

学科分类：080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 0703[理学-化学] 

基　　金：Project (2019YFC1907404) supported by the National Key R&D Program of China Project (20202ACBL204002) supported by the Key Project of Natural Science Foundation of Jiangxi Province,China Project (GJJ200813) supported by the Jiangxi Province Education Department of Science and Technology,China Project (205200100509) supported by the Program of Scientific Research Foundation of Jiangxi University of Science and Technology,China Project (JXUSTQJBJ2017004) supported by the Program of Qingjiang Excellent Young Talents of Jiangxi University of Science and Technology,China。 

主　　题：白钨矿 NaOH 焙烧 物相转化 浸出 

摘      要：针对NaOH-SiO_(2)焙烧-水浸法从白钨矿中高效提取钨进行了研究。首先,对NaOH-SiO_(2)焙烧分解白钨矿热力学进行了分析,结果表明在该焙烧条件下CaWO_(4)转化成Na_(2)WO_(4)和Na_(2)CaSiO_(4)从热力学角度是可行的;其次,研究了焙烧分解与水浸工艺参数对提取钨的影响,在Na_(2)O与WO_(3)摩尔比为2.2、SiO_(2):WO_(3)摩尔比为1、焙烧温度为700℃、焙烧时间2 h的条件下,通过控制液固比为3.2:1、水浸温度为80℃、浸出4 h后,钨的浸出率达到99.33%,浸出渣含钨为0.71%。进一步的物相分析表明,在NaOH-SiO_(2)焙烧过程中,白钨矿中的CaWO_(4)高效转化成Na_(2)CaSiO_(4)和Na_(2)WO_(4)。本研究结果为白钨矿采用火法高效提取钨提供了新路径。