四川马边-金阳地区磷精矿硫酸分解实验研究  

Experimental Study on Decomposition of Phosphate Concentrate by Sulfuric Acid in Mabian-Jinyang Area,Sichuan

作　　者：李超[1] 刘述平[1] 徐凌飞[1] 邓杰[1] 唐湘平[1] 钟庆文[1] LI Chao;LIU Shu-ping;XU Ling-fei;DENG Jie;TANG Xiang-ping;ZHONG Qing-wen(Institute of Multipurpose Utilization of Mineral Resources,CAGS,Sichuan Chengdu 610041,China)

机构地区：[1]中国地质科学院矿产综合利用研究所,四川成都610041

出　　处：《广州化工》2020年第22期83-85,共3页GuangZhou Chemical Industry

基　　金：中国地质大调查项目:四川马边-金阳地区磷等重要矿产资源综合利用调查评价(项目编号:DD20190626)。

摘　　要：针对四川马边-金阳地区难选胶磷矿选矿得到的磷精矿,采用硫酸法进行分解实验,考察硫酸用量系数、酸解温度、酸解时间等对磷、铁、铝等元素酸解率的影响,确定出较优的酸分解条件为:硫酸用量系数1.1、酸解温度75℃、酸解时间50 min、分解液固比4。优化条件下,实验得到磷的分解率达到96.37%,获得了较好的酸解效果。酸解渣(磷石膏)渣率达122%,其放射性比活度较低,可直接用作建筑原材料,实现了马边-金阳地区难选胶磷矿的综合利用。Aiming at the phosphate concentrate obtained from the beneficiation process of colloidal phosphate rock in Mabian-Jinyang area,Sichuan,the sulfuric acid method was used to conduct the decomposition test.Due to the influence of the dissolution rate,the optimal acid decomposition conditions were determined as follows:sulfuric acid dosage coefficient 1.1,acid hydrolysis temperature 75℃,acid hydrolysis time 50 min,and decomposition liquid-solid ratio 4.Under the optimized conditions,the decomposition rate of phosphorus reached 96.37%,and a good leaching effect was obtained.The phosphogypsum slag-rate reached 122%and had low radioactivity specific activity.Phosphogypsum can be directly used as construction raw materials,realizing the comprehensive utilization of refractory colloidal phosphate rock in Mabian-Jinyang area.

关 键 词：磷精矿 硫酸 磷石膏 

分 类 号：TM912.9[电气工程—电力电子与电力传动]