无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2013, Vol. 45 ›› Issue (9): 45-.

• 论文 • 上一篇    下一篇

磷石膏热分解制备二氧化硫和氧化钙研究

郑绍聪1,宁 平2,汪 帆1,成飞翔1,胡粉娥1   

  1. 1.曲靖师范学院化学化工学院,云南省高校煤资源开发利用及其污染控制重点实验室,云南曲靖 655011;
    2.昆明理工大学环境科学与工程学院
  • 出版日期:2013-09-10 发布日期:2013-09-13

Study on preparation of sulfur dioxide and lime by thermal decomposition of phosphogypsum

Zheng Shaocong1,Ning Ping2,Wang Fan1,Cheng Feixiang1,Hu Fen′e1   

  1. 1.Yunnan Key Laboratory of University of Development,Utilization and Pollution Control of Coal Resources,
    College of Chemistry and Chemical Engineering,Qujing Normal University,Qujing 655011,China;
    2.Faculty of Environmental Science and Engineering,Kunming University of Science and Technology
  • Published:2013-09-10 Online:2013-09-13

摘要: 在氮气氛下研究了碳还原分解磷石膏制备二氧化硫和氧化钙的反应特性,用烟气分析仪分析析出的气体成分,用X射线衍射仪(XRD)分析热分解固体样品。考察了煤颗粒尺寸、原料配比和反应温度对磷石膏热分解的影响。得到磷石膏热分解制备二氧化硫和氧化钙的最佳条件:煤粒径小于150 μm,碳与硫酸钙物质的量比为0.8,反应温度为1 000 ℃。在此条件下,可以得到二氧化硫最大体积分数为12.5%的分解炉气,分解固体样品中氧化钙质量分数达到65.32%,可以用作水泥原料或二氧化碳吸收剂。

关键词: 磷石膏, 热分解, 二氧化硫, 氧化钙

Abstract: The reaction characteristics of the thermal decomposition of phosphogypsum with coal as reducing agent to prepare CaO and SO2 were investigated in N2  atmosphere.The output gas and the solid decomposition products were analyzed by gas analyzer and XRD,respectively.The influences of particle size of coal,mix ratio of raw materials,and reaction temperature on the thermal decomposition of phosphogypsum were studied.The results showed that the optimum conditions to produce SO2 and CaO were:the coal particle size was less than 150 μm,the amount-of-substance ratio of C to CaSO4 was 0.8,and the decomposition temperature was 1 000 ℃.Under optimum conditions,the maximum SO2 volume fraction of the decomposition gas was 12.5%,and the CaO mass fraction of the solid product was 65.32%,which can be used as a raw material of cement or a CO2 sorbent.

Key words: phosphogypsum, thermal decomposition, sulfur dioxide, calcium oxide

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