Method for preparing carbon black by electrocracking waste and old tyre

Abstract

The invention relates to a process for preparing carbon black by utilizing electric arc to crack waste and old tires, which utilizes a closed container and electric arc to regulate and control oxygen to constitute an electric-arc cracking furnace, and waste and old tires are cracked in the electric-arc cracking furnace. Steel lines in the waste tires are fused in the electric-arc temperature, steel ingots are directly prepared to recycle, the chemical bond of rubber in the waste and old tires are fractured under the electric-arc temperature and are cracked into carbon black, carbon monoxide, hydrogen gas and the like. The carbon black which is prepared by the upper method has the advantages of big specific surface area, high activity and high utilization valve, the surface characteristic of the carbon black which is originally added in the waste and old tires is restored and improved after the electric-arc temperature. Gases such as carbon monoxide, hydrogen gas and the like which are produced in the electric-arc temperature can be directly utilized by city gas after the process of de-oiling and desulfurizing, the process has no waste gas to be discharge and no pollution.

Description

[0001] The invention relates to a method for harmlessly treating waste tires, in particular to a method for producing carbon black and city gas by cracking waste tires. Background technique: [0002] At present, the main method of processing waste tires is to use a closed furnace to indirectly heat and dry waste tires to vaporize and crack the rubber in waste tires to obtain fuel oil, combustible gas and carbon black. The above method has low thermal efficiency due to indirect heating; meanwhile, the steel wire in the waste tire is sandwiched in the carbon layer, which needs to be mechanically separated and recovered again, causing pollution; the carbon black obtained at the dry distillation temperature has a small specific surface area and low utilization value. Invention content: [0003] The task of the present invention is to provide a pollution-free method for directly producing steel ingots and city gas by cracking waste tires. [0004] Technical solution: In order to ...

AI Technical Summary

Problems solved by technology

The above method has low thermal efficiency due to indirect heating; at the same time, the steel wire in the waste tire is sandwiched in the carbon layer, which needs to be mechanically separated and recovered again, causing pollution; the carbon black obtained at the dry distillation temperature has a small specific surface area and low utilization value

Images