摘要
采用工业盐酸对高镁磷尾矿进行酸解预处理,得到酸解滤液和渣相,对得到的渣相进行水洗,水洗液与酸解滤液混合后产生固体1,再对其固液分离后的液体进行酸化处理,酸化滤液进行浓缩产生固体2,浓缩滤液通过循环酸解使滤液中的磷和镁得到富集。结果表明,经富集后酸解液中Mg O和P2O5的质量浓度可分别达到116.07 g/L和49.99 g/L,酸化液中Mg O和P2O5的质量浓度可分别达到170.37 g/L和72.06 g/L。经XRD物相和XRF化学组成分析可知固体1主要物质为Ca Cl H2PO4·H2O和Ca SO·2H4 2O,固体2主要物质为Mg Cl2以及Ca(PO3)2,为进一步利用该物质打下基础。
The phosphate tailings with high magnesium content were pretreated by industrial hydrochloric acid,obtaining the acid solution and slag.We washed the slag with water,then mixed washing water with the acid solution,gaving the solid No.1.The filtrate during the preparation of the solid No.1 was acidified with sulphuric acid and concentrated to produce solid No.2.The phosphorus and magnesium in the concentrated filtrate were enriched by cyclic acid hydrolysis.The results showed that magnesium oxide and phosphorus pentoxide in the acid solution reached 116.07 g/L and 49.99 g/L,respectively,and magnesium oxide and phosphorus pentoxide in the acidizing fluid reached 170.37 g/L and 72.06 g/L,respectively after enriching.Testing by X-ray diffraction spectrometry and X-ray fluorescence spectrometry,the main components of the solid No.1 were monocalcium chlorophosphate and dihydrate gypsum,and the main components of the solid No.2 were magnesium chloride and calcium metaphosphate,which laid the foundation for further utilization of these substances.
作者
杨成
李防
潘志权
张华丽
YANG Cheng;LI Fang;PAN Zhiquan;ZHANG Huali(School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430205,China;Hubei Xingfa Chemical Group Co.,LTD,Yichang 443000,China)
出处
《武汉工程大学学报》
CAS
2018年第4期386-390,共5页
Journal of Wuhan Institute of Technology
关键词
磷尾矿
循环
酸解
phosphate tailings
circulate
acid hydrolysis
