含镍、铬固体废弃物资源化利用工艺研究

The Technical Study on Recycling of Waste Containing Nickel and Chromium

不锈钢尘、泥及氧化铁皮等固体废弃物因含有大量的镍、铬等重金属,如处理不当,不仅造成资源浪费,而且严重污染环境,尤其存在六价铬污染。镍、铬是不锈钢生产必需的合金,随着资源日益枯竭,镍、铬资源的回收对不锈钢产业的可持续发展意义远大。在研究含镍、铬固体废弃物基本特性及其当前回收利用基础上,阐述了OXYCUP工艺的机理及优点。该工艺首先将不锈钢除尘灰、尘泥、氧化铁皮等废弃资源制成含碳砖;再经富氧竖炉冶炼出含铬镍铁水,返回到不锈钢冶炼工序利用,回收镍、铬资源,实现了含铬镍废弃资源循环利用,降低了不锈钢生产成本,实现了不锈钢生产的绿色、环保运营。

Solid waste of dust, mud and skin composed by oxide from producing stainless steel contain large amounts of Nickel, Chromium and other heavy metal. If waste of resource, but also the serious environmental Nickel and Chromium alloy are necessary for stainless drying up, it is important for continuance advancing they are not disposed properly, it works not only the pollution, especially pollution of six-price chromium. steel production, along with the nickel and chromium development of stainless steel industry that nickel, chromium is reused into producing stainless steel. In the research base of basic characteristics and using of solid waste containing nickel and chromium generated in the stainless steel production process, the paper expound the Oxyeup technics. Firstly making bricks containing carbon in use of stainless steel dust, mud, iron oxide and other waste; then the bricks is smelt into high nickel-chromium alloy by Oxycup; lastly the alloy is returned to producing stainless steel by way of material, in order to reuse nickel and chromium, achieve the nickel chromium recycling,~reduce the production cost of stainless steel, and realize that the production of stainless steel achieving a green, environmentally friendly operations.