Environment·Health·Safety

Study on new process of comprehensive utilization and separation of sulfur and calcium of titanium gypsum

  • Lei MA ,
  • Yu SHENG ,
  • Junhong ZHOU ,
  • Yujun YANG ,
  • Hui LUO ,
  • Chunying PAN ,
  • Guo WANG
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  • 1.Qiannan Normal University for Nationalities,Duyun 558000,China
    2.Guizhou Sunward Fuquan Chemicals Co. ,Ltd.

Received date: 2021-10-22

  Online published: 2022-07-14

Abstract

In order to solve the problem of comprehensive utilization of titanium gypsum,a mild wet chemical conversion method was put forward.Using low-price ammonium bicarbonate as raw material,titanium gypsum solid waste was converted into high-quality calcium carbonate products,and ammonium sulfate and iron-rich slag were obtained at the same time.The test results showed that under the conditions of mass ratio of titanigypsum to ammonium bicarbonate of 1∶1,reaction temperature of 65 ℃ and reaction time of 1.25 h,the conversion rate of titanigypsum could reach more than 95%.The converted solid calcium carbonate and iron slag were heated and boiled with NH4Cl to recover ammonium carbonate,and the solid-liquid separation after the reaction was completed.Further reaction of the recovered ammonium carbonate with the separation liquid could obtain calcium carbonate with purity of more than 98% and iron slag with iron content of more than 61%.

Cite this article

Lei MA , Yu SHENG , Junhong ZHOU , Yujun YANG , Hui LUO , Chunying PAN , Guo WANG . Study on new process of comprehensive utilization and separation of sulfur and calcium of titanium gypsum[J]. Inorganic Chemicals Industry, 2022 , 54(7) : 124 -128 . DOI: 10.19964/j.issn.1006-4990.2021-0639

References

1 石鑫,杨绍利,马兰.“三石膏”综合利用现状及其新工艺[J].现代化工,2020,40(9):8-13,19.
1 SHI Xin, YANG Shaoli, MA Lan.Present situation of comprehensive utilization of“three-gypsum”and new technologies[J].Modern Chemical Industry,2020,40(9):8-13,19.
2 朱静平,张婷婷,刘洪,等.钛石膏制备片状钙白粉的生产工艺研究[J].非金属矿,2019,42(4):51-52,76.
2 ZHU Jingping, ZHANG Tingting, LIU Hong,et al.Technical study on the preparation of flaky calcium white powder from titanium gypsum[J].Non-Metallic Mines,2019,42(4):51-52,76.
3 谭纪林.钛石膏作缓凝剂在水泥生产中的应用[J].水泥,2017(2):20-23.
3 TAN Jilin.Application of titanium gypsum as retarder in cement production[J].Cement,2017(2):20-23.
4 张璐,吕广忠.金属矿山充填采矿法中充填材料的应用及展望[J].现代矿业,2010,26(1):20-22.
4 ZHANG Lu, LV Guangzhong.The application and prospect of filling material in metal mine filling mining methods[J].Modern Mining,2010,26(1):20-22.
5 危流永,郑伯坤.红石膏胶结充填技术[J].矿业研究与开发,2014,34(5):16-18.
5 WEI Liuyong, ZHENG Bokun.Cemented filling technology of gypsum rubrum[J].Mining Research and Development,2014,34(5):16-18.
6 孙家瑛,郑京彪,周震雷.钛石膏-粉煤灰复合制备路基回填材料试验研究[J].公路,2001,46(6):107-110.
6 SUN Jiaying, ZHENG Jingbiao, ZHOU Zhenlei.Study on composite for backfill material made by waste gypsum from TiO2 production and fly ash[J].Highway,2001,46(6):107-110.
7 王晓琪,姚媛媛,陈宝成,等.硫酸法钛石膏作为土壤调理剂在油菜上的施用效果研究[J].水土保持学报,2018,32(4):333-338,345.
7 WANG Xiaoqi, YAO Yuanyuan, CHEN Baocheng,et al.Effects of titanium gypsum produced by sulfuric acid method as soil conditioner on rape seedlings[J].Journal of Soil and Water Conservation,2018,32(4):333-338,345.
8 高强,鲍树涛.大型钛石膏制硫酸联产水泥的应用实践[J].硫酸工业,2019(2):11-16,19.
8 GAO Qiang, BAO Shutao.Application practice of co-production of sulphuric acid and cement with large titanium gypsum[J].Sulphuric Acid Industry,2019(2):11-16,19.
9 刘凤铃,彭佥赟,刘洪.钛石膏制备CaSO4晶须[J].化工设计通讯,2018,44(1):70-72.
9 LIU Fengling, PENG Qianyun, LIU Hong.Preparation of CaSO4 whiskers by titanium[J].Chemical Engineering Design Communications,2018,44(1):70-72.
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