Microwave-assisted low-temperature carbonization method for waste plastics and application thereof

The invention relates to a microwave-assisted low-temperature carbonization method for waste plastics and application of the microwave-assisted low-temperature carbonization method. The method comprises the following steps: firstly, uniformly mixing crushed waste plastic with biomass carbon or a target carbon material, a nickel-based catalyst, a compatibilizer and the like, then extruding and granulating by utilizing a screw extruder, and finally transferring into a microwave carbonization furnace for microwave carbonization treatment. Biomass carbon or a target carbon material and a nickel-based catalyst are used as a combined catalyst and a wave-absorbing agent, the carbonization temperature of the waste plastic is remarkably reduced, the morphology of the waste plastic is regulated and controlled, the internal temperature of the plastic is rapidly increased by means of the excellent wave-absorbing capacity, and the carbon conversion efficiency and degree are improved by means of deep heat transfer while ge