Tire pyrolysis carbon black and ash separation method and apparatus thereof

Abstract

The invention provides a tire pyrolysis carbon black and ash separation method and an apparatus thereof. The content of ash in separated carbon black is below 1%. A technical scheme is characterized in that tire pyrolysis carbon black particles are crushed to control he particle size below 15[mu]m in order to peel the carbon black from the ash, and effective electrostatic sorting is realized in an airflow carrying suspension state by using a specific resistance difference between the carbon particles and inorganic ash. The carbon black and ash separation apparatus is mainly composed of a crushing chamber, an electrostatic separation chamber and a dust collecting cloth bag. Copper powder is adopted in the crushing chamber as a crushing medium and a charge reinforcement medium to improve the subsequent electrostatic sorting efficiency; and a pole plate in the electrostatic separation chamber is a round structure, charged particles fully contact with the pole plate under the driving of rotation airflow to realize a high separation efficiency, and the carbon black particles for releasing charges are rapidly carried away by the airflow in order to effectively avoid secondary mixing of the particles and the ash. The apparatus has the advantages of continuous operation, large processing capability and high separation efficiency.

Description

technical field

[0001] The invention relates to the technical field of waste tire pyrolysis carbon black treatment, in particular to a method and device for separating tire pyrolysis carbon black and ash. Background technique

[0002] Pyrolytic carbon black is the key product of waste tire pyrolysis, its quality and market application value directly restrict the economy of waste tire pyrolysis process. However, because waste tire pyrolysis carbon black contains recycled carbon black fillers, inorganic ash (such as ZnO and ZnS, etc.) and carbonaceous deposits generated during pyrolysis, its surface activity is poor and its commercial value is very low, making it Practical applications are greatly limited.

[0003] Usually, the ash content in carbon black prepared by direct pyrolysis of waste tires is about 20%, and the process of separating ash from carbon black is relatively difficult. Untreated pyrolytic carbon black can only be used as a reinforcing filler for low-grade ...

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