Hazard-free treatment system and method for electronic waste

Abstract

The invention discloses a hazard-free treatment system and method for electronic waste. The system comprises a material preparation system, a pyrolysis system, a casting machine, an oxygen supply system and a flue gas purification system. The material preparation system comprises a disassembling device, a waste storage bank, a weighing device, a conveying device and a physical crusher, wherein waste printed circuit boards and waste liquid crystal display screens are stored in the waste storage bank. The pyrolysis system comprises an oxygen obliquely-blowing revolving furnace and a feeder. Thetreatment method comprises the steps of 1, collecting and storing the waste printed circuit boards, the waste liquid crystal display screens, scrap copper and scrap iron; 2, conducting material preparation, weighing, material compounding, mixing and crushing, and delivering the materials into the feeder; 3, conducting feeding; 4, conducting reductive smelting; 5, conducting slag dumping; 6, conducting blowing; 7, conducting drossing and ingot casting; and 8, discharging a product out of the furnace, and casting an alloy plate. The hazard-free treatment system and method have the beneficial effects that smelting, reduction and refining can be completed in the same furnace, an additional smelting furnace does not need to be added, and inertia slag capable of being piled up is generated; andthe hazard-free treatment system can be completely closed, and the environmental requirement is met.

Description

technical field [0001] The invention belongs to the field of resource utilization of electronic waste, and relates to the harmless utilization treatment of dismantling waste electric appliances and dismantling products (including waste printed circuit boards, waste liquid crystal screens, waste miscellaneous copper, waste iron, etc.). Background technique [0002] Developed countries attach great importance to the recovery of conventional metals and rare and precious metals from PCBs, and the technical means adopted are usually divided into two categories: physical methods and chemical methods. Physical methods are mainly used for the recovery of conventional metals (such as aluminum and copper). For example, the United States uses powerful cyclone separators to recover aluminum from PCBs of personal computers; Separation of gold, silver and iron, aluminum, zinc and tin in circuit boards; Sweden uses electric drum electrostatic separators to recover copper. Chemical methods...

AI Technical Summary

Problems solved by technology

Domestic technology for processing waste electronic materials is relatively backward. Many processing technologies are aimed at recycling raw materials, and there are big problems in terms of recycling efficiency and environmental pollution.

In terms of operation, it is basically manual operation, the recovery efficiency is difficult to guarantee, and the health of the operator is also greatly threatened. From this point of view, there is a lot of room for the development of domestic recycling technology, especially to solve the secondary problems in recycling. Secondary pollution of oxins

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