工业石膏的资源化利用途径与展望

电力、钢铁、磷肥等工业生产过程中产生大量副产石膏,如不能妥善处理而将其大量搁置,不仅造成环境污染,而且导致资源浪费。副产石膏的无害化、大综化、高质化利用,已经成为工业发展中的热点话题。对国内工业副产品石膏中脱硫石膏和磷石膏在水泥、建材、农业、化工等领域应用和技术开发现状进行了总结,并对未来工业石膏资源化利用提出了建议。以工业石膏为原料制备硫酸联产水泥、铁酸钙以及转铵法制备硫酸的工业路线具有可行性,有望实现脱硫石膏和磷石膏的大规模利用。

Resource utilization approach of industrial gypsum and its prospect

A large amount of by-product gypsum is produced in the process of industrial production,such as electric power,iron and steel,phosphate fertilizer,etc.If it cannot be properly treated and put it aside in large quantities,it will not only cause environmental pollution but also lead to waste resources.The harmless,comprehensive and high-quality utilization of by-pro-duct gypsum has become a topical focus in industrial development.The application and technical development status of desul-furization gypsum and phosphogypsum in cement,building materials,agriculture and chemical industry were summarized,and the suggestions for the resource utilization of industrial gypsum in the future were put forward.In this paper,it was pointed out that industrial routes such as preparing sulphuric acid co-production cement,calcium ferrite and conversion of ammonium to sulphuric acid by industrial gypsum were feasible,which would expect to realize the large-scale utilization of desulphuriza-tion gypsum and phosphogypsum.