化工矿物与加工2026，Vol.55Issue(5)：31-37,7.DOI:10.16283/j.cnki.hgkwyjg.2026.05.005
钛白粉废水制备水磷铁矿与高纯石膏工艺研究
Study on preparation of phosphate ferrihydrite and high-purity gypsum from titanium dioxide wastewater
摘要
Abstract
A large amount of iron-containing acidic wastewater is produced in the production process of titanium dioxide.Direct neutralization treatment has the problems of waste of iron resources and difficult utilization of titanium gypsum.Based on this,the phosphate ferrihydrite functional material was prepared by hydrothermal method by adding a small amount of phosphoric acid to titanium dioxide wastewater.The effects of phosphorus-iron ratio(1∶3-1∶1),reaction temperature(100-200℃)and reaction time(0.5-6 h)on the synthesis product and iron recovery rate were investigated.The results show that under the conditions of reaction tempe-rature of 180℃,reaction time of 6 h and phosphorus-iron ratio of 4∶5,the spherical phosphate ferrihydrite with multi-level structure is synthesized.The grain size is 25.8 nm,and the particle size is concentrated in 6-10 μm.At this time,the iron recovery rate in the original solution is 99.65%.Under the optimum conditions for the preparation of water phosphorus iron ore,calcite was added to the residual acidic waste liquid to obtain low-impurity gypsum(whiteness of 78.59%).The research results can provide reference for the high-value utilization of similar industrial waste liquid.关键词
钛白粉废水/水磷铁矿/高纯石膏/水热法Key words
titanium dioxide wastewater/phosphate ferrihydrite/high-purity gypsum/hydrothermal method分类
资源环境引用本文复制引用
岳豪,江鹏,郑奎,何嵘,黄阳,王永红,罗显明,付全军,竹文坤..钛白粉废水制备水磷铁矿与高纯石膏工艺研究[J].化工矿物与加工,2026,55(5):31-37,7.基金项目
四川省科技计划项目(CCJ[2022]No.390-1-9). （CCJ[2022]No.390-1-9）
