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谢容生, 刘树根, 吕游, 宁平, 车建青, 曾繁端. 磷石膏窑外分解中试研究[J]. 环境工程学报, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
引用本文: 谢容生, 刘树根, 吕游, 宁平, 车建青, 曾繁端. 磷石膏窑外分解中试研究[J]. 环境工程学报, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
shu
Xie Rongsheng, Liu Shugen, Lü You, Ning Ping, Che Jianqing, Zeng Fanduan. Pilot-scale study of phosphogysum decomposition in a vertical retorting furnace[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
Citation: Xie Rongsheng, Liu Shugen, Lü You, Ning Ping, Che Jianqing, Zeng Fanduan. Pilot-scale study of phosphogysum decomposition in a vertical retorting furnace[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
shu

磷石膏窑外分解中试研究

  • 1.

    昆明理工大学环境科学与工程学院, 昆明 650500

  • 基金项目:

    云南省高端人才引进计划项目(2010CI110)

    云南省人培基金资助项目(KKSY201322014)

    昆明理工大学分析测试基金项目(20140614)

  • 中图分类号: X705

Pilot-scale study of phosphogysum decomposition in a vertical retorting furnace

  • 1.

    Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

  • Fund Project:

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  • 摘要: 以无烟煤为还原剂、添加3.5%矿化剂,在有效容积为0.25 m3的竖罐反应装置中对磷石膏进行了窑外分解中试研究。结果表明:随着反应温度的升高,磷石膏分解率逐渐增大;适宜的还原氛围有利于磷石膏的热分解进程;混合物料的碳硫比为0.75时,在950 ℃条件下磷石膏分解率最高可达90.6%,窑气中SO2体积分数约为8%。HSC热力学计算表明:生成中间产物CaS是硫酸钙热分解过程的必经阶段,鼓入适量空气是保证磷石膏热分解中间产物CaS较为彻底地转化为CaO与SO2的必要条件。
    Abstract: Pilot-scale experiments of phosphogypsum decomposition were conducted in a vertical retort furnace, with anthracite as a reductant and the addition of a 3.5% mineralization agent. The decomposition rate of phosphogypsum rose gradually with the increase of the reaction temperature. The decomposition rate reached 90.6% under the conditions of carbon/sulfur (C/S) ratio of 0.75 and a pyrolysis temperature of 950 ℃, and the concentration of sulfur dioxide (SO2) in the off-gas reached 8%. Maintaining a moderate reducing atmosphere was necessary for phosphogypsum decomposition; levels too high or too low of the C/S ratio led to a weak decomposition rate during phosphogysum processing. According to thermodynamics parameters derived from HSC software, producing an intermediate substance of calcium sulfide (CaS) was the first stage in thermal decomposition of calcium sulfate (CaSO4), and appropriate aeration was a necessary requirement for phosphogypsum decomposition to guarantee that CaS can convert to calcium oxide (CaO) and SO2.
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出版历程
  • 收稿日期:  2015-01-25
  • 刊出日期:  2016-06-03
谢容生, 刘树根, 吕游, 宁平, 车建青, 曾繁端. 磷石膏窑外分解中试研究[J]. 环境工程学报, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
引用本文: 谢容生, 刘树根, 吕游, 宁平, 车建青, 曾繁端. 磷石膏窑外分解中试研究[J]. 环境工程学报, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
shu
Xie Rongsheng, Liu Shugen, Lü You, Ning Ping, Che Jianqing, Zeng Fanduan. Pilot-scale study of phosphogysum decomposition in a vertical retorting furnace[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
Citation: Xie Rongsheng, Liu Shugen, Lü You, Ning Ping, Che Jianqing, Zeng Fanduan. Pilot-scale study of phosphogysum decomposition in a vertical retorting furnace[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2633-2637. doi: 10.12030/j.cjee.201412154
shu

磷石膏窑外分解中试研究

  • 1. 昆明理工大学环境科学与工程学院, 昆明 650500
  • 收稿日期:  2015-01-25
基金项目:

云南省高端人才引进计划项目(2010CI110)

云南省人培基金资助项目(KKSY201322014)

昆明理工大学分析测试基金项目(20140614)

摘要: 以无烟煤为还原剂、添加3.5%矿化剂,在有效容积为0.25 m3的竖罐反应装置中对磷石膏进行了窑外分解中试研究。结果表明:随着反应温度的升高,磷石膏分解率逐渐增大;适宜的还原氛围有利于磷石膏的热分解进程;混合物料的碳硫比为0.75时,在950 ℃条件下磷石膏分解率最高可达90.6%,窑气中SO2体积分数约为8%。HSC热力学计算表明:生成中间产物CaS是硫酸钙热分解过程的必经阶段,鼓入适量空气是保证磷石膏热分解中间产物CaS较为彻底地转化为CaO与SO2的必要条件。

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