摘要
为实现高效的脱硫灰资源化利用,探索从钢铁生产过程中产生的烧结烟气脱硫灰制备高附加值碳酸钙和硫酸钙工艺,推动工业废弃物的高效转化与再利用,从而减轻环境污染。该工艺包括磁选去除金属杂质、调节浆液pH、通空气氧化、静态混合以及循环利用等多个环节,显著提高了脱硫灰的资源化利用效率,并成功制得高纯度碳酸钙与硫酸钙产品。实验结果表明,所制得硫酸钙纯度超过95%、碳酸钙纯度高达98%以上,且碳酸钙的白度值超过94%。此外,碳酸钙的粒径和比表面积等关键性能指标亦得到有效控制,为脱硫灰资源化利用提供了创新途径,展示了显著的经济和环境双重效益。
In order to achieve efficient re-utilization of desulfurization ash,the process for preparation of high value-added calcium carbonate and calcium sulfate products from the sintering flue gas desulfurization ash generated during the iron/steel production process is explored,which promotes the efficient conversion and re-utilization of industrial wastes,thereby reducing environmental pollution.This process,which includes magnetic separation to remove metal impurities,adjustment of slurry pH,air oxidation,static mixing and recycling,significantly improves the efficiency of re-utilization of flue gas desulfurization ash,and successfully produces high-purity calcium carbonate and calcium sulfate products.Experimental results show that the purity of calcium sulfate obtained exceeds 95%,that of calcium carbonate obtained exceeds 98%,and the whiteness value of calcium carbonate product is higher than 94%.In addition,the key performance indexes of calcium carbonate product,such as particle size and specific surface area,can be effectively controlled,which provides an innovative way to re-utilize the desulfurization ash,and demonstrates significant economic and environmental benefit.
作者
郭宏雨
胡彦杰
鞠杰
宣绍峰
赵鑫元
张沈裔
GUO Hong-yu;HU Yan-jie;JU Jie;XUAN Shao-feng;ZHAO Xin-yuan;ZHANG Shen-yi(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Environmental Resource Science and Technology Company Limited,China Baowu Steel Group Corp.,Shanghai 201900,China)
出处
《现代化工》
北大核心
2025年第S1期251-256,共6页
Modern Chemical Industry
基金
国家自然科学基金(22378128,22108079,U22B20143,U22A20429)
上海市科学技术委员会项目(22dz1205900)。
关键词
脱硫灰
资源化利用
高附加值
碳酸钙
硫酸钙
desulfurization ash
re-utilization
high value-added
calcium carbonate
calcium sulfate
作者简介
郭宏雨(2000-),男,硕士生,研究方向为烧结烟气脱硫灰资源化利用,ghyecust2022@163.com;通讯联系人:胡彦杰(1979-),男,博士,教授,研究方向为功能纳米材料的燃烧合成及其产业化应用,zsybgjc@163.com。
