钢渣中磷分离及回收的研究现状和发展趋势

 中国的钢渣产量巨大,但是钢渣的综合利用率较低,造成了严重的资源浪费和环境负担。钢渣中磷的分离与回收是实现钢渣高效资源化利用的关键所在,对开发新的磷资源和建立“无废渣”炼钢流程具有重要意义。首先分析了钢渣中磷的分布状态,总结了目前提出的从钢渣中分离和回收磷的主要方法及其技术特点,并着重介绍了利用选择性浸出从钢渣中直接提取磷酸盐产品的新技术及其研究进展,分析了选择性浸出的原理和实现钢渣循环利用的冶金工艺流程,讨论了其优缺点,最后对未来钢渣资源化利用的发展提出了建议和展望。

Research status and development trend of phosphorus separation and recovery from steelmaking slag

The productivity of steelmaking slag in China is huge,while its comprehensive utilization ratio is lower,resulting in severe resources waste and environmental burden. The separation and recovery of phosphorus from steelmaking slag is the key technology to achieve its efficient resource utilization,which is significant to the development of new phosphate resources and the establishment of a waste-free steelmaking process. Firstly,the distribution status of phosphorus in steelmaking slag was analyzed,and the major methods of phosphorus recovery from steelmaking slag proposed and their technical characteristics were summarized. A novel method of direct extraction of phosphate products from steelmaking slag by selective leaching and its research progress was introduced. The principle of selective leaching and a process of realizing the recycling of steelmaking slag was analyzed. The advantages and disadvantages of this method were discussed,and some suggestions for the future development of resource utilization of steelmaking slag were finally proposed.