磷石膏湿法偶联除杂规律初探
收稿日期: 2020-06-17
网络出版日期: 2020-12-15
基金资助
国家自然科学基金资助(21978153)
Primary exploration of removing impurities from phosphogypsum by wet coupling process
Received date: 2020-06-17
Online published: 2020-12-15
吴宝建 , 吕昕峰 , 张清杰 , 易美桂 , 向兰 . 磷石膏湿法偶联除杂规律初探[J]. 无机盐工业, 2020 , 52(12) : 55 -58 . DOI: 10.11962/1006-4990.2020-0063
The utilization of phosphogypsum resource was limited by the co-existence of the impurities.The technology rule of removing impurities from phosphogypsum with silane coupling agent by wet coupling process was discussesed.Results showed that the silane coupling agent can combine with silica and carboxyl organic impurities in phosphogypsum by hydrogen bonding and dehydration condensation to make the corresponding impurities hydrophobic suspended and separated from by scraping,and leading to the formation of gypsum with a purity of 96.2%（CaSO4·0.5H2O） and a whiteness of 92.2%.
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