工业钛石膏的除铁工艺技术研究  

Study on iron removal from industrial titanium gypsum

作　　者：彭沐森 何琳 李海艳 罗建洪[1] Peng Musen;He Lin;Li Haiyan;Luo Jianhong(Insititute of Chemical Engineering,Sichuan University,Chengdu 610000,Sichuan,China;Guizhou Sunward Chemical New Materials Research Institute Co.,Ltd.,Zunyi 563102,Guizhou,China)

机构地区：[1]四川大学化学工程学院,四川成都610000 [2]贵州胜威化工新材料研究院有限公司,贵州遵义563102

出　　处：《钢铁钒钛》2023年第6期110-116,共7页Iron Steel Vanadium Titanium

基　　金：中央引导地方基金(黔科中引地[2022]4019)。

摘　　要：针对硫酸酸浸钛石膏进行除铁工艺研究,去除钛石膏中的铁离子杂质,实现钛石膏纯度和白度的有效改善,为钛石膏下游产品的开发利用提供充足的原料。试验研究了固液比、反应温度、反应时间、转速、粒度和硫酸浓度等不同酸浸条件下的除铁效果,获得适宜的工艺条件,结合其物相、微观相貌、粒度分布等属性的变化情况,同时探讨了钛石膏除杂机理。结果表明,在钛石膏硫酸酸浸除杂过程中,适宜的工艺条件为:固液比为1:10 g/g、反应温度为70℃、反应时间为60 min、SO_(4)^(2-)质量分数为7%、转速为400 r/min、粒度为150μm,此时钛石膏除铁率可达到94%,白度有了明显的改善。In this study,the removal of iron impurity contained in the industrial sulfuric acid leaching titanium gypsum was investigated,which leads to effective improvement of purity and whiteness of titanium gypsum,providing sufficient raw materials for the development and utilization of titanium gypsum downstream products.The effect of iron removal under different acid leaching conditions such as solid-liquid ratio,reaction temperature,reaction time,rotation speed,particle size and sulfuric acid concentration was studied and the optimum process conditions was discovered.Furthermore,the impurity removal mechanism of titanium gypsum was found out based on the changes of phase,microstructure and particle size distribution.During the process of removing iron from titanium gypsum by sulfuric acid leaching,the optimal process parameters are obtained as follows:solid-liquid ratio of 1:10 g/g,reaction temperature of 70℃,reaction time of 60 min,SO_(4)^(2-)mass fraction of 7%,rotating speed of 400r/min and particle size of 150μm,under which the iron removal leaching rate of titanium gypsum can reach 94%.Under the optimal conditions,the acid leaching product changes from light yellow to gray white,and the whiteness is evidently improved.

关 键 词：钛石膏 除杂 Fe^(2+) 硫酸 固液比 反应温度 浸取率 

分 类 号：X757[环境科学与工程—环境工程] TF823[冶金工程—有色金属冶金]