矿产保护与利用2024，Vol.44Issue(6)：122-128,7.DOI:10.13779/j.cnki.issn1001-0076.2024.06.009
磷石膏浮选提纯及制备β半水石膏
Flotation Purification of Phosphogypsum and Preparation of β-hemihydrate Gypsum
摘要
Abstract
The large-scale stockpiling of phosphogypsum poses a significant environmental challenge,mainly due to its high impurity content and low whiteness,which critically limit its potential for high-value applications.This study investigated phosphogypsum from a plant in Hubei Province,integrating process mineralogy with graded flotation for efficient purification.The results showed that the use of hydrochloric acid,water glass,collector ZX-4-4 and frother Q1 in a closed circuit flotation process-consisting of one rougher flotation,two cleaner flotations and a sequential middle return-significantly improved the quality of the material.Specifically,the CaSO4-2H2O content of the phosphogypsum was increased from 89.65%to 98.15%,while the whiteness improved from 37.10%to 52.44%.The overall recovery rate reached 83.47%with a significant reduction in impurities:silica content decreased from 6.16%to 0.58%and iron content was minimized to 0.006 2%.The whiteness of the β-hemihydrate gypsum produced by direct calcination of the purified phosphogypsum exceeded 80%,significantly exceeding the first grade specifications of the national standard GB/T 23 456-2018 for phosphogypsum.Thus,the flotation process significantly improved both the quality of the phosphogypsum and the performance of the derived products.关键词
磷石膏/工艺矿物学/浮选/除杂增白/β半水石膏Key words
phosphogypsum/process mineralogy/flotation/impurity removal and whitening/β-hemihydrate gypsum分类
矿业与冶金引用本文复制引用
董雄波,叶光利,牛梦圆,张诚,张峻,杨华明..磷石膏浮选提纯及制备β半水石膏[J].矿产保护与利用,2024,44(6):122-128,7.基金项目
湖北省科技重大专项(2022ACA004-7) （2022ACA004-7）
中国科协青年人才托举工程(2024QNRC001) （2024QNRC001）
