过氧化氢氧化增白磷石膏的工艺研究  

Phosphogypsum Whitened by Hydrogen Peroxide via Oxidation

作　　者：邹香华 吴良贤 邓秋林[1,2] 廖辉伟 史连军[2] 谭宏斌 张红[2] 张涛 董发勤 Zou Xianghua;Wu Liangxian;Deng Qiulin;Liao Huiwei;Shi Lianjun;Tan Hongbin;Zhang Hong;Zhang Tao;Dong Faqin(College of Materials and Chemistry,Southwest University of Science and Technology,Mianyang,Sichuan 621000;State Key Laboratory of Efficient Utilization for Low Grade Phosphate Rock and Its Associated Resources,Post-doctoral Scientific Research Station of Wengfu(Group)Co.,Ltd.,Guiyang,Guizhou 550016)

机构地区：[1]西南科技大学材料与化学学院,四川绵阳621010 [2]瓮福(集团)股份有限公司博士后科研工作站低品位磷矿及其伴生资源高效利用国家重点实验室,贵州贵阳550016

出　　处：《非金属矿》2022年第5期74-78,共5页Non-Metallic Mines

基　　金：瓮福(集团)股份有限公司博士后科研工作站基金(YF(2020)022号);西南科技大学自然科学基金(15zx7125)。

摘　　要：以工业固体废弃物磷石膏为研究对象,采用先酸处理后氧化的方式对磷石膏进行增白,考察酸的质量分数、过氧化氢质量分数、固液比(质量比)、处理时间对磷石膏白度的影响。结果表明,在室温下,先用硫酸处理,再用过氧化氢对磷石膏进行氧化增白,当磷石膏与硫酸的固液比(质量比)为1∶4,硫酸质量分数为20%,酸处理时间为2.0 h,磷石膏与过氧化氢固液比为1∶6,H_(2)O_(2)质量分数为20%,氧化处理时间为1.5 h时,磷石膏白度可从33.7%提高到64.3%,增白效果明显,满足用于生产建材行业石膏粉的白度要求。Taking the industrial solid waste phosphogypsum as the research object,the whitening of phosphogypsum was studied by acid treatment and oxidation whitening.The effects of acid concentration,hydrogen peroxide concentration,solid-liquid mass ratio and treatment time on the whiteness of phosphogypsum were investigated.The results showed that at room temperature,the phosphogypsum was treated with sulfuric acid first,and then was oxidatively whitened with hydrogen peroxide,when the solid-liquid ratio of phosphogypsum and sulfuric acid was 1∶4,the concentration of sulfuric acid was 20%,the acid treatment time was 2.0 h,the solid-liquid ratio of phosphogypsum and hydrogen peroxide was 1∶6,the concentration of H_(2)O_(2) was 20%,and the treatment time was 1.5 h,the whiteness of phosphogypsum could be increased from 33.7%to 64.3%,and the whitening effect was obvious,which met the whiteness requirements of gypsum powder used as raw material in the subsequent production of building materials industry.

关 键 词：磷石膏 增白 白度 过氧化氢 

分 类 号：TQ177.37[化学工程—硅酸盐工业]