PRODUCING CALCIUM NITRATE AND RARE-EARTH ELEMENT CONCENTRATES BY PHOSPHOGYPSUM CONVERSION

the Chemical Technology Pub Date : 2014-02-05 DOI:10.5755/j01.ct.64.2.6024

S. V. Vlasjan, N. D. Voloshin, A. Shestozub

引用次数: 7

Abstract

Experimental researches of the dissolution of c alcium carbonate obtained as a result of phosphogypsum conversion by ammonium or sodium carbonate and nitric acid with obtaining a concentrate of rare-earth elements and other liquid products have been performed. The structure of phosphochalk and the outlet half-product is presented. The substantiation of recycling expediency of phosphogypsum waste – phosphoric acid and phosphoric fertilizers has been carried out. DOI: http://dx.doi.org/10.5755/j01.ct.64.2.6024

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磷石膏转化生产硝酸钙和稀土精矿

对磷石膏经碳酸铵或碳酸钠与硝酸转化后得到的碳酸钙进行了溶解实验研究，得到稀土元素精矿和其他液体产物。介绍了磷粉笔及其出口半成品的结构。对磷石膏废料——磷酸和磷肥的回收利用便利性进行了论证。DOI: http://dx.doi.org/10.5755/j01.ct.64.2.6024

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来源期刊

the Chemical Technology

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