通过热分解的半干脱硫灰资源利用方面的进展:一种高效,低温的方法,用于大规模加工
Lincheng Liu1, Xiaohui Fan1, Min Gan2
1School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, People's Republic of China.
概括
研究人员开发了一种高效的低温方法来分解半干烟气脱硫灰 (SFGDA). 添加碳和氧化铁可以将硫酸 (CaSO4) 的分解温度降低230K以上,从而使资源回收.
科学领域:
- 工业废弃物的价值化 工业废弃物的价值化
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
背景情况:
- 半干烟气脱硫灰 (SFGDA) 是一个重要的工业废物.
- 目前用于SFGDA回收CaO和SO2的热分解方法面临诸如由于高CaSO4分解温度 (>1678 K) 的高能耗等挑战.
研究的目的:
- 审查和讨论降低SFGDA中CaSO4分解温度的方法.
- 为了确定SFGDA资源回收的高效和低温分解路径.
主要方法:
- 关于调节热解大气 (CO,C) 和添加剂 (Fe2O3,FeS2) 以降低CaSO4分解温度的文献综述.
- 分析大气调节和添加剂的联合影响.
主要成果:
- 在微氧化大气下,用固体碳源和Fe2O3进行热解,将CaSO4分解温度显著降低至少230K.
- 通过这种优化的方法,实现了超过95%的脱硫效率.
- 回收的CaO可以用于铁酸盐的合成,而SO2用于硫酸的生产.
结论:
- 通过结合大气调节和添加剂,已经建立了SFGDA高效的低温分解路径.
- 这种方法为SFGDA资源回收的大规模工业应用提供了有希望的前景.
- 价值化SFGDA有助于可持续的工业实践和废物管理.
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