Enrichment and separation method of cobalt element in waste circuit board multi-metal mixed resources

Abstract

The invention belongs to the technology of comprehensive recycling of complex secondary nonferrous metal resources, and particularly relates to an enrichment and separation method of cobalt in waste circuit board multi-metal hybrid resources. The method includes the steps that firstly, a multi-metal complex mixture containing cobalt is obtained from a waste circuit board through smashing and sorting; a collecting agent is added into the multi-metal complex mixture; the prepared multi-metal complex mixture is placed in a graphite crucible of a vacuum furnace; after the metal mixture is completely melted, trace enrichment reagent niobium or boron is added to regulate the separation rate of liquid copper and liquid iron; a liquid copper and liquid iron mixed melt is a separation melt, the upper layer of the separation melt is the liquid iron, and the lower layer of the separation melt is the liquid copper; and the liquid iron gathering cobalt on the upper layer is poured out, and cobalt is separated from the multi-metal complex mixture of the waste circuit board to be recycled. The method is simple and easy to implement and has the characteristics of being low in cost, comprehensive, efficient, free of pollution and the like.

Description

Technical field [0001] The invention belongs to the comprehensive recycling and reuse technology of complex secondary non-ferrous metal resources, in particular to a method for enriching and separating cobalt elements in polymetallic mixed resources of waste circuit boards, and relates to the recycling and regeneration of electronic waste in the technical field of environmental protection And comprehensive high-efficiency resource utilization technology will help solve the harm of electronic waste to the ecological environment and alleviate the pressure of my country's shortage of non-ferrous metal resources. Background technique [0002] With the continuous innovation of science and technology and the upgrading of electronic and electrical products, a large number of discarded electronic products have become the fastest growing and most difficult type of solid waste. Electronic waste, also known as electronic waste, includes all kinds of used computers, communication equipment, h...

AI Technical Summary

Problems solved by technology

However, this method has low leaching efficiency and limited effect on some metals, especially the metal elements wrapped in ceramics cannot be recovered; the disadvantage of this technology is that the consumption of chemical reagents is large, and at the same time it produces a large amount of corrosive and toxic elements. As well as the waste liquid and waste residue of heavy metal ions, it is easy to cause secondary pollution

If the cobalt element in the polymetallic mixture of waste circuit boards is not properly handled, on the one hand, it will cause great harm to humans, animals and plants, such as excessive cobalt elements in groundwater and soil; on the other hand, valuable secondary non-ferrous metal resources will not be obtained. Recycling and recycling, resulting in waste of resources