Fundamental studies for high temperature processing of tungsten leaching residues for alloy formation

作     者：Xu Wang Xiao‑Dong Ma Kun Su Chun‑Fa Liao Bao‑Jun Zhao 

作者机构：Faculty of MaterialsMetallurgy and ChemistryJiangxi University of Science and TechnologyGanzhouChina The University of QueenslandBrisbaneAustralia 

出 版 物：《Tungsten》 (钨科技（英文）)

年 卷 期：2020年第2卷第4期

页      面：362-370页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：National Research Foundation National Science Foundation(BCS 0613319) Centre National de la Recherche Scientifique National Science Foundation 

主　　题：Tungsten Leaching residue Valuable elements Liquidus temperature Slag 

摘      要：The first step in the production of tungsten is to enrich tungsten from two minerals wolframite((Fe,Mn)WO_(4))and scheelite(CaWO_(4))through the leaching *** leaching residue usually contains a certain amount(2-5 wt%)of WO_(3) which is higher than that in the tungsten ore(generally less than 1 wt%).In addition,the leaching residue may also consist of other valuable elements such as Cu,Ta,Nb,Sn,Sc,Mn and *** the phases and their compositions present in the residue is one of the key steps for the efficient *** typical residue sample is carefully analysed by electron probe X-ray microanalysis and X-ray fluorescence.A high-temperature process,which includes pre-reduction at 1000-1100℃and smelting reduction at 1450-1500℃,is proposed to efficiently recover the valuable *** work and thermo-dynamic calculations confirmed that most of the valuable elements can be economically recovered with optimum conditions.