Resourceful treatment method for waste circuit board

Abstract

The invention discloses a resourceful treatment method for a waste circuit board. The resourceful treatment method comprises the process steps: carrying out crushing pretreatment of the waste circuit board, carbonization treatment of the waste circuit board, selective separation of carrying out flows including carbon-containing polymetallic materials, secondary combustion of flue gas, denitrification of the flue gas, rapid solidification treatment of the flue gas, deacidification treatment of the flue gas, adsorption treatment of the flue gas and collection and treatment of the flue gas; and finally respectively recovering a metal mixture and carbon powder, which are supplied for subsequent recycling. The resourceful treatment method has the following advantages that harms of dioxins and halogen substances can be fundamentally put an end, so that the environmental protection index is increased, and sanitary production of resource recycling the waste circuit board is realized; compared with other circuit board methods, the resourceful treatment method can fully utilize the heat energy of organic components in the waste circuit board, and the energy utilization ratio of the waste circuit board is increased; and metal and nonmetal in the waste circuit board are effectively separated from each other, regeneration recycling of resources is realized without secondary pollution, and the environmental, social and economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of secondary utilization of waste resources, in particular to a method for recycling waste circuit boards. Background technique [0002] Printed circuit board (PCB) is an important part of electronic devices and is widely used in electronic and electrical products. Waste printed circuit boards contain 20%-30% metal, 25%-40% organic matter, and 25%-35% glass fiber, which are available resources. For example, the gold content of waste laptop circuit boards reaches 630 grams per ton , the gold content of waste mobile phone circuit boards is as high as 1500 grams per ton, which has a high recycling value; at the same time, harmful substances such as lead, cadmium, mercury and other heavy metals and halogen flame retardants also bring a great deal to the recycling of waste circuit boards. If these substances cannot be properly disposed of, they will not only cause environmental pollution, but also cause a seriou...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of environmental pollution caused by dioxin and the like in the pyroprocessing process of waste circuit boards in view of the deficiencies of the prior art, so as to realize the clean recovery of waste circuit boards as resources and energy

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