Progress on resource utilization technology of waste circuit boards
Waste circuit board is a key component of e-wastes,of which reasonable resource utilization is significant to alleviate resource shortage and reduce environmental pollution.The composition of waste circuit boards was analyzed.The current research status of metal and non-metal resource utilization technology therein was reviewed.The advantages and shortcomings of methods including the preprocessing method(mechanophysical treatment),major recycling methods(heat treatment,chemical treatment,and biological treatment),and the emerging method(supercritical treatment)were introduced.The research progress on each method in terms of different resource recovery was presented.Finally,the future development direction of waste circuit board resource utilization technology was provided as a reference for the waste circuit board resource recovery.