Production Practice of NRT Furnace Smelting Electronic Waste and Polymetallic Industrial Solid Waste
In response to the independently developed NRT furnace by a domestic enterprise based on smelting electronic waste and polymetallic industrial solid waste technology,this paper analyzes the problems encountered in the production operation and proposes solutions one by one:the process slag types and the control of heat balance in the reaction should be ensured by the pre-treatment and quantitative feed-in of the raw materials according to the characteristics of the complex compositions of the raw materials entering the furnace.The offgas can be exhausted up to standard by adopting the technical route of"strengthening pyrometallurgical process-layered secondary combustion offgas waste heat recovery-high efficiency offgas handling".The paper puts forward some problems such as spontaneous combustion of soot and short service life of the lance,and the problems can be solved by adding secondary air to lower the negative pressure and increasing the oxygen concentration etc.By studying the influence of magnetic iron on the copper-contained slag,it is concluded that the copper-contained slag increases with the increase of magnetic iron content.It is shown that when the mass fraction of magnetic iron is controlled below 1%,the copper mass fraction in slag can be less than or equal to 0.8%.
万方数据
维普
