摘要
针对本研究团队提出的"铁矾渣活化焙烧-稀酸酸浸-酸浸液磷酸除铁-除铁后液提In和Zn"新工艺,本文重点研究磷酸除铁滤渣物性及热分析动力学。通过XRD、IR、TG-DSC等对磷酸除铁滤渣的组成和物相进行分析表征。结果表明,磷酸除铁滤渣为FePO4·2H2O,滤渣平均直径12.6μm。采用FWO、KAS两种等转化率法求得滤渣磷酸铁水合物脱水反应的活化能为47.28~52.88kJ/mol。
In response to the new process of"jarosite slag activation roasting,acid leaching,ferric removal with phosphoric acid,In and Zn extraction after iron removal"proposed by our research team,this paper focuses on properties and thermal analysis kinetics of iron phosphate filter slag.Chemical composition and phase of filter slag were analyzed and characterized by XRD,IR and TG-DSC.The results show that filter slag is FePO4·2H2O with average diameter of particle size of 12.6μm.Activation energy of dehydration reaction of iron phosphate hydrate from filter slag is 47.28~52.88 kJ/mol calculated by FWO and KAS iso-conversional methods.
作者
高丽霞
戴子林
吴海鹰
孔振兴
吴长永
GAO Li-xia;DAI Zi-lin;WU Hai-ying;KONG Zhen-xing;WU Chang-yong(Guangdong Province Key Laboratory of Rare Earth Development and Application,Guangdong Institute of Rare Metals,Guangzhou 510651,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2020年第7期81-85,93,共6页
Nonferrous Metals（Extractive Metallurgy)
基金
广东省自然科学基金资助项目(2018A0303130096,2016A030313801)
广东省科学院院属骨干科研机构创新能力建设专项项目(2018GDASCX-0110)
广东省科学院建设国内一流研究机构行动专项资金项目(2020GDASYL-20200302010)。
关键词
铁矾渣
酸浸液
磷酸铁
物性
jarosite slag
acid leaching solution
ironic phosphate
performance
