含锌渣尘中有价金属回收利用现状与研究进展

Situation and Research Development of Recovery Valuable Metals in Zinc Dust and Residue

为了促进含锌渣尘中有价金属回收利用技术的发展,对资源量大、富含铁酸锌的钢铁厂电炉粉尘和湿法浸锌渣等2类典型二次锌资源,从综合利用原理、技术路线和利用效果等方面进行了评述。指出了矿相重构是实现电炉粉尘和湿法浸锌渣综合利用的有效方法。电炉粉尘主要有价组分为锌和铁,矿相重构处理后宜采取选矿法分离出锌组分,剩余产物应返回炼铁工序,实现在钢铁厂内循环利用;湿法浸锌渣主要有价组分为锌、铁、镓、铟、银等,矿相重构处理后根据元素走向,采取选矿和湿法提取相结合的方法,在不产生二次污染的前提下,重点实现有价元素的综合回收。

In order to promote the development of valuable metal recycling technology in zinc dust and residue, two types of typical secondary zinc resources, such as electric furnace dust and zinc leaching residue, which are abundant resources and rich in zinc ferrite, were reviewed based on the principle of comprehensive utilization, technical routes and utilization effects. It is pointed out that the mineral phase reconstitution is an effective method to realize the comprehensive utilization of electric furnace dust and zinc leaching residue. The main valuable components of electric furnace dust are zinc and iron. After the mineral phase is reconstituted, the zinc component should be separated by mineral separation. The remaining products should be returned to the iron making process for recycling in the steel plant;The main valuable components in zinc leaching residue are zinc, iron, gallium, indium, silver, etc. After the mineral phase reconstruction treatment, according to the elemental trend, a combination method of mineral processing and wet extraction is adopted, and achieve the comprehensive recovery of valuable elements without the secondary pollution.