无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2022, Vol. 54 ›› Issue (7): 105-109.doi: 10.19964/j.issn.1006-4990.2021-0594

• 工业技术 • 上一篇    下一篇

结晶法提纯钛白副产硫酸亚铁中杂质去除规律的研究

朱莞烨1,2(),唐定1,2,池荷婷1,2,廖祥辉1,2,庄荣传1,2,王乾坤1,2,沈青峰1,2   

  1. 1.低品位难处理黄金资源综合利用国家重点实验室, 福建上杭 364200
    2.厦门紫金矿冶技术有限公司
  • 收稿日期:2021-09-30 出版日期:2022-07-10 发布日期:2022-07-14
  • 作者简介:朱莞烨(1985— ),女,工程师,从事环保材料冶金方向的研究;E-mail:zwy15159298016@163.com

Study on impurity removal rule of ferrous sulfate from by-product of titanium dioxide by crystallization purification

ZHU Wanye1,2(),TANG Ding1,2,CHI Heting1,2,LIAO Xianghui1,2,ZHUANG Rongchuan1,2,WANG Qiankun1,2,SHEN Qingfeng1,2   

  1. 1.State Key Laboratory of Comprehensive Utilization of Low Grade Refractory Gold Ores, Shanghang 364200
    2.Xiamen Zijin Mining and Metallurgical Technology Co. , Ltd.
  • Received:2021-09-30 Published:2022-07-10 Online:2022-07-14

摘要:

采用冷冻结晶工艺对钛白副产硫酸亚铁进行了提纯研究,重点考察了结晶母液循环时镁、锰杂质的累积情况以及它们的去除规律,同时对可能引入体系的钠杂质影响也进行了研究。通过多次结晶可以逐渐降低七水硫酸亚铁晶体中镁、锰杂质含量,但结晶母液的循环会导致体系内镁、锰杂质逐渐累积。利用结晶液与结晶体中镁、锰含量的关系曲线推断得到:当结晶液中镁含量低于298 mg/L时,七水硫酸亚铁晶体中镁质量分数将低于0.025%;当结晶液中锰含量高于761 mg/L时,七水硫酸亚铁晶体中锰质量分数将高于0.05%。另外,结晶法提纯硫酸亚铁时应避免向体系中引入钠离子,否则会导致七水硫酸亚铁晶体中钠杂质含量超标问题。该论文研究结果可以为利用结晶法提纯钛白副产硫酸亚铁提供一定的理论和技术指导。

关键词: 钛白副产, 硫酸亚铁, 结晶法, 杂质累积, 钠离子

Abstract:

The freezing crystallization process was used to study on purification of by-product ferrous sulfate of titanium dioxide.The accumulation of Mg and Mn impurities and their removal rules during the circulation of the crystallization mother liquor were mainly investigated.Meanwhile,the influence of Na impurities that may be introduced into the system was also studied.Through multiple crystallizations,the Mg and Mn impurities in FeSO4·7H2O could be gradually reduced,but the circulation of the crystallization mother liquor would cause the gradual accumulation of Mg and Mn impurities in the system.By using the relationship curve between the content of Mg and Mn in the crystal liquid and the crystal,it could be inferred that the Mg content in the FeSO4·7H2O would be lower than 0.025% when the Mg content in the crystal liquid was less than 298 mg/L,and the Mn content in FeSO4·7H2O would be higher than 0.05% when the Mn content in the crystal liquid was higher than 761mg/L.In addition,Na should be avoided to introduce into the system,otherwise it would cause the Na impurity content in FeSO4·7H2O to exceed the standard.The research results of this paper could provide certain theoretical and technical guidance for purifying by-product ferrous sulfate of titanium dioxide by crystallization approach.

Key words: by-product of titanium dioxide, ferrous sulfate, crystallization, impurity accumulation, sodium ion

中图分类号: