化工矿物与加工2025，Vol.54Issue(5)：48-55,8.DOI:10.16283/j.cnki.hgkwyjg.2025.05.007
磷石膏煅烧制备超白Ⅱ型无水石膏工艺研究
Process research on preparation of uper-white typeⅡ anhydrous gypsum by calcined phosphogypsum
摘要
Abstract
Phosphogypsum is a large solid waste discharged during the production of phosphate fertilizers,and its resource utilization and high-value utilization have become research hotspots in the fields of materials and environment.The use of calcined phosphogypsum can produce type Ⅱ anhydrous gypsum materials with higher whiteness and excel-lent performance,which have good application prospects.This experiment prepared uper-white type Ⅱ anhydrite(APG)by high-temperature calcination of phosphogypsum and investigated the effects of calcination temperature and additives on its properties.The results show that with the increase of calcination temperature,the standard consistency of anhydrous gypsum decreased,and the setting time is first prolonged and then shortened;The APG 28 days prepared by calcination at 900℃has the highest compressive strength of 8.23 MPa and a whiteness of 89.12%;Adding admixtures can shorten the setting time and improve compressive strength;The uper-white APG obtained by calcining at 500℃and adding 0.34%additive has excellent performance,with compressive strengths of 12.82 MPa and 45.82 MPa at 3 and 28 days,initial and final setting times of 13.0 h and 16.5 h,respectively,and a whiteness of 96.13%.The research results can provide reference for the high-value utilization of phosphogypsum.关键词
磷石膏/高温煅烧/无水石膏/外加剂/抗压强度/白度Key words
phosphogypsum/high temperature calcination/anhydrous gypsum/admixtures/compressive strength/whiteness分类
化学化工引用本文复制引用
龚辉,冷为贵,赵国军,孟庆坤,杨正波,陈红霞,张晓菲,谭宏斌..磷石膏煅烧制备超白Ⅱ型无水石膏工艺研究[J].化工矿物与加工,2025,54(5):48-55,8.基金项目
四川省科技厅项目(2024ZHCG0127) （2024ZHCG0127）
西南科大四川天府新区创新研究院基金项目. （）
