中南大学学报（自然科学版）2025，Vol.56Issue(8)：3175-3185,11.DOI:10.11817/j.issn.1672-7207.2025.08.008
硫酸氢钠焙烧分解白钨矿过程磷、钼、砷杂质转变迁移行为研究
Study on transformation and migration behavior of phosphorus,molybdenum and arsenic impurities during decomposition of scheelite by sodium bisulfate roasting
摘要
Abstract
Clarifying the transformation and migration behavior of the main impurity mineral phase in scheelite(such as apatite and molybdenite)during the sodium bisulfate roasting process plays a significant role in regulating the decomposition of scheelite.Experimental methods such as X-ray diffraction(XRD)and inductively coupled plasma optical emission spectrometry(ICP-OES)were used to systematically study the transformation and migration of phosphorus and molybdenum impurity compounds during the composition of scheelite by sodium bisulfate roasting,and the effects of these compounds on the main metal tungsten were investigated.The effects of temperature and oxygen pressure on the transformation and migration of arsenic-containing compounds were discussed by thermodynamic analysis.The results show that Ca5(PO4)3F in scheelite can be completely decomposed during the decomposition of scheelite by sodium bisulfate roasting,generating H3PO4,P2O5 gas and water-soluble Na3PO4.The decomposed H3PO4 can combine with CaWO4 to form water-soluble PW8O26.The impurity mineral phase CaMoO4 is roasted with sodium bisulfate to form MoO3.When the sodium bisulfate is excessive,part of MoO3 continues to react with sodium pyrosulfate to form a water-soluble[MoO2(SO4)2]m2m-,part of MoO3 volatilizes and escapes,and the remaining MoO3 coexists with the roasted product.As2S3,As2S2 and FeAsS in scheelite are oxidized to As2O5,while FeAsO4 does not react with NaHSO4·H2O,and arsenic is mainly retained in the roasting products.关键词
硫酸氢钠/白钨矿/焙烧/杂质/转变迁移行为Key words
sodium bisulfate/scheelite/roasting/impurities/transformation and migration behavior分类
矿业与冶金引用本文复制引用
梁勇,陈赞鸿,蒲婷,徐略渭,刘寅亮,张明辉..硫酸氢钠焙烧分解白钨矿过程磷、钼、砷杂质转变迁移行为研究[J].中南大学学报（自然科学版）,2025,56(8):3175-3185,11.基金项目
国家自然科学基金资助项目(52364046) （52364046）
江西省主要学科学术与技术带头人培养项目-领军人才(20243BCE51049) （20243BCE51049）
战略有色金属绿色低碳冶金江西省重点实验室项目(2024SSY11031)(Project(52364046)supported by the National Natural Science Foundation of China （2024SSY11031）
Project(20243BCE51049)supported by Jiangxi Provincial Academic and Technical Leaders in Major Disciplines Cultivation Program-Leading Talents （20243BCE51049）
Project(2024SSY11031)supported by Jiangxi Provincial Key Laboratory of Green and Low Carbon Metallurgy for Strategic Nonferrous Metals) （2024SSY11031）
