Method for deeply deliming and desulphurizing waste tire regenerated carbon black

CN119463538APending Publication Date: 2025-02-18GUANGDONG UNIV OF TECH +1
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Patent Information

Application Number
CN202411615866.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-13
Publication Date
2025-02-18

AI Technical Summary

Technical Problem

The prior art is difficult to efficiently remove the ash and sulfur content in the recycled carbon black of waste tires in high-efficiency, resulting in less significant quality improvement effect, limiting its application in industrial production.

Method used

The process of reducing atmosphere heat treatment combined with pickling and alkaline washing is adopted to break sulfide bonds by reducing gas molecules, improve the removal efficiency of pickling and alkaline washing, and deeply remove the ash and sulfur in carbon black.

Benefits of technology

It significantly improves the ash removal and sulfur removal efficiency of waste tire recycled carbon black, reduces the ash and sulfur content, improves the quality of the product, and has a low process cost, which is suitable for large-scale industrial production.

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Abstract

The invention belongs to the technical field of high-value utilization of waste tire regenerated carbon black, and particularly relates to a method for deeply deliming and desulphurizing waste tire regenerated carbon black. In order to develop a high-efficiency, low-cost and simple-process upgrading method for deep de-ashing and de-sulfurizing of waste tire regenerated carbon black, the method comprises the following steps: firstly, placing the waste tire regenerated carbon black in a reducing gas atmosphere for high-temperature calcination, and then carrying out acid washing and alkali washing on the waste tire regenerated carbon black subjected to reduction heat treatment; the ash content and the sulfur content in the waste tire regenerated carbon black can be deeply removed, and the high-quality waste tire regenerated carbon black is obtained. According to the method disclosed by the invention, the reducing atmosphere is used for carrying out high-temperature heat treatment on the waste tire regenerated carbon black, and acid washing and alkali washing are matched, so that the content of ash and sulfur in the waste tire regenerated carbon black can be effectively reduced. The method provided by the invention realizes high-efficiency deep de-ashing and desulfurization of the waste tire regenerated carbon black, can obtain high-quality carbon black at low cost, and is simple and convenient in process and suitable for large-scale industrial production.
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Citation Information

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