Treatment of Rare-Earth Concentrate to Remove Phosphorus and Fluorine Compounds

被引：5

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, Murmansk Oblast, Russia

来源：

RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 2010年 / 83卷 / 11期

关键词：

Water Leaching; Lanthanide Concentrate; Hydrated Silica; Sodium Compound; Sulfuric Acid Treatment;

D O I：

10.1134/S1070427210110042

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

It was suggested to purify poor lanthanide concentrate precipitated from the extraction orthophosphoric acid produced by the dihydrate process to remove phosphorus and fluorine compounds by heating a mixture of the concentrate with sulfuric acid in the presence of hydrated silica followed by water leaching of water-soluble sulfates and phosphates. The treatment conditions for the separation of the bulk of phosphorus( V) and the entire fluorine in the form of SiF(4) were determined, ensuring approximately 3.5-fold increase in lanthanide concentration.

引用

页码：1919 / 1924

页数：6