Method for recovering waste circuit board resin material

• Main Authors: WU DUN, ZHANG WENYONG, HU GUANGQING, FANG HAI'OU, LUO TIANZHI, MIAO CHUNGUANG, JIANG LONGJIN, ZHANG SHUN, LI HUAIQING
• Format: Patent
• Language: Chinese; English
• Published: 25.12.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; CRACKING HYDROCARBON OILS; FERROUS OR NON-FERROUS ALLOYS; FUELS; GENERAL PROCESSES OF COMPOUNDING; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC MACROMOLECULAR COMPOUNDS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; SEPARATION; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING-UP

The invention discloses a method for recovering a waste circuit board resin material, which comprises the following steps of (1) preliminary crushing, (2) separating the metal layer from the substrate, (3) thermal cracking, and (4) tail gas treatment. The method mainly comprises the following steps: of crushing the waste circuit board to roughly obtain a metal layer, mainly copper, carrying out pulse crushing to further separate the metal layer from a base layer, recovering the resin in the substrate by adopting a pyrolysis method, and adding calcium carbonate powder to react with halogen in the resin better to generate more inorganic halogen. The content of inorganic halogen is reduced, the generation of substances such as dioxin is limited, and the metal on the surface of the substrate is fully separated through pulse crushing treatment, so that calcium carbonate can be better combined with resin in the subsequent pyrolysis process, and the pyrolysis efficiency is improved. 本发明公开了一种废旧电路板树脂材料回收的方法，包括以下步骤，(1)