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Method of preparing carbon black by pyrolyzing wasted tyres

A technology of waste tires and waste tires, which is applied in the direction of fibrous fillers, etc., can solve the problems of limited commercial promotion, and achieve the effects of good economy, high commercial promotion ability, and improved production efficiency

Inactive Publication Date: 2018-09-11
DALIAN UNIV OF TECH
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  • Description
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Problems solved by technology

This method not only effectively improves the added value of pyrolytic carbon black, but also has a simple process and no additional cost input, which solves the problem of limited commercial promotion of existing technologies

Method used

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  • Method of preparing carbon black by pyrolyzing wasted tyres

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Embodiment Construction

[0019] The specific implementation manner of the present invention will be described in detail below in conjunction with the technical solutions.

[0020] The invention discloses a method for preparing carbon black by pyrolysis of waste tires. The waste tires are firstly removed by a bead cutting machine to remove bead steel wires, and then divided into two parts, the tread and the sidewall, by an automatic cutting device. The tread part is crushed by the crusher and enters the pyrolysis system. The pyrolysis device is a fixed bed, the pyrolysis temperature is 500°C, the heating rate is 10°C / min, the residence time: 30min, and the carrier gas type: N 2 , Carrier gas flow rate: 100ml / min. The pyrolyzed carbon black passes through the magnetic separator to separate the carbon black from the tread steel wire, and the pyrolytic carbon black can be utilized; the sidewall part is crushed by the crusher and then enters the pyrolysis system. The pyrolysis device is a fixed bed, and th...

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Abstract

The invention belongs to the technical field of recycling of wasted tyres and relates to a method of preparing carbon black by pyrolyzing wasted tyres. The method includes steps of: 1) removing tyre bead wires from the wasted tyres through a bead cutting machine, and separating the wasted tyres into two parts of treads and side walls; 2) crushing the treads through a crushing machine and feeding the treads into a pyrolysis system, feeding pyrolyzed carbon black to a magnetic separation step to separate the carbon black from the tyre bead wires, thereby utilizing the pyrolyzed carbon black; 3)crushing the side walls through the crushing machine and feeding the side walls into the pyrolysis system to perform pyrolysis, the pyrolyzed carbon can be directly utilized without magnetic separation since the side walls do not contain steel wires. In the method, the carbon black is separated from the source, so that a problem of quality reduction of the carbon black due to doping of different types of carbon black is avoided and two pure pyrolyzed carbon black products can be produced. The method broadens marketing channel, is simple and flexible in process, is free of extra cost, and solves a problem of poor economy in the prior art.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of waste tires, and relates to a method for preparing carbon black by pyrolysis of waste tires. Background technique [0002] Pyrolytic carbon black is an important product of pyrolysis of waste tires, mainly composed of carbon black and inorganic fillers added in the tire production process, and coke deposits formed due to secondary reactions during the pyrolysis process, with a yield of 30% to 40% %, its market application value determines the economic benefits of the pyrolysis process. Carbon black consumption for rubber accounts for 90% of the total carbon black, of which 67.5% is for tires. The pyrolysis of waste tires to prepare carbon black to replace industrial carbon black is one of the most concerned applications in the rubber industry. [0003] The composition and structure of waste tire pyrolysis carbon black are generally similar to those of industrial carbon black adde...

Claims

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Application Information

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IPC IPC(8): C09C1/48
CPCC09C1/482
Inventor 李爱民王梦雅
Owner DALIAN UNIV OF TECH
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