Production of high-quality gypsum raw materials from phosphogypsum

被引：19
|
作者：
Lokshin, E. P. [1 ]
Tareeva, O. A. [1 ]
机构：
[1] Russian Acad Sci, Tananaev Inst Chem & Technol Rare Elements & Mine, Kola Sci Ctr, Apatity 184209, Russia
来源：
RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 2015年 / 88卷 / 04期
关键词：
LEACHING-OUT; LANTHANIDES;
D O I：
10.1134/S1070427215040023
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Possibility of obtaining high-quality gypsum products from phosphogypsums produced in sulfuric acid processing of the Khibiny apatite concentrate was examined. A variant of phosphogypsum processing including the sulfuric acid leaching of rare-earth elements and admixtures of phosphorus and fluorine compounds, neutralization of the purified gypsum product, and utilization of phosphates and fluorides released from phosphogypsum was considered. It was experimentally demonstrated that the agitation sulfuric acid leaching is inefficient for purification of phosphogypsums. It was confirmed that combining a percolation sulfuric acid leaching of phosphogypsums with their preliminary washing with water is promising for obtaining high-quality gypsum raw materials.
引用
收藏
页码：567 / 573
页数：7
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