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Control foaming performance of phosphate rocks used for wet-process of phosphoric acid production by phosphoric acid
Hydrometallurgy ( IF 4.7 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.hydromet.2020.105364
Hongqiang Li , Wu Ge , Jun Zhang , Richard M. Kasomo , Jiahao Leng , Xiaoqing Weng , Qian Chen , Qian Gao , Shaoxian Song , Linbo Xiao , Chengtao Tian

Abstract Wet-process of phosphoric acid production generates significant amounts of foam which limit plant production efficiency. The control of foaming performance of phosphate rocks and defoaming mechanism has been studied by foaming performance test, X-ray powder diffraction analysis, X-ray fluorescence analysis, contact angle measurement and particle size distribution measurement respectively. The results show that carbonate minerals were digested easily than apatite in phosphoric acid solution. The maximum foam volume (MFV) and equilibrium foam volume (EFV) of phosphate rock could effectively be reduced by Phosphoric acid pretreatment. Pretreatment time and solid content of slurry play a vital role in defoaming process as well. The defoaming efficiency of phosphoric acid was as good as commercial defoamer DF. The foaming performance of phosphate rocks is in directly proportional to the content of carbonate minerals. The defoaming mechanism of phosphoric acid should be attributed to the selective digestion of carbonate minerals in phosphate rocks, not due to the slight change of particle size distribution and surface wettability of phosphate rock.

中文翻译:

磷酸湿法制磷酸用磷矿的发泡性能控制

摘要 磷酸生产的湿法工艺会产生大量泡沫,这限制了工厂的生产效率。分别通过发泡性能测试、X射线粉末衍射分析、X射线荧光分析、接触角测量和粒度分布测量,研究了磷矿发泡性能的控制和消泡机理。结果表明,碳酸盐矿物在磷酸溶液中比磷灰石更容易消化。磷酸预处理可有效降低磷矿的最大泡沫体积(MFV)和平衡泡沫体积(EFV)。预处理时间和浆料的固含量在消泡过程中也起着至关重要的作用。磷酸的消泡效率与市售消泡剂DF一样好。磷酸盐岩的发泡性能与碳酸盐矿物的含量成正比。磷酸的消泡机理应归因于磷矿中碳酸盐矿物的选择性消化,而不是由于磷矿粒度分布和表面润湿性的微小变化。
更新日期:2020-08-01
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