Regenerated charcoal, its preparation methods, and applications

By treating waste activated carbon through hot pressing regeneration and flash explosion separation, its grindability and harmful impurities are improved, solving the application problem of waste activated carbon in blast furnace injection and realizing efficient resource utilization and blast furnace operation stability.

CN122298382APending Publication Date: 2026-06-30UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Filing Date
2026-05-18
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Waste activated carbon has poor grindability, making it difficult to achieve the required fineness with pulverized coal in the same grinding system. This results in high grinding energy consumption, which cannot meet the requirements of blast furnace injection process. Furthermore, untreated waste activated carbon may contain harmful impurities, affecting the blast furnace life.

Method used

Through hot-press regeneration and flash explosion separation technology, waste activated carbon is reacted with a reaction medium under high temperature and pressure, which reconstructs its internal structure, forming a loose and porous structure. Then, the carbon structure is broken by instantaneous pressure release, which improves grindability and removes harmful impurities.

Benefits of technology

It improves the grindability and reactivity of recycled char, reduces energy consumption in the pulverizing system, reduces the risk of erosion of the blast furnace lining, and achieves efficient resource utilization.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application provides a regenerated char, its preparation method, and its application, belonging to the field of regenerated char materials. The preparation method includes: providing waste activated carbon and a reaction medium; subjecting the waste activated carbon and the reaction medium to hot-press regeneration treatment to obtain hot-pressed regenerated material; and subjecting the hot-pressed regenerated material to flash explosion separation treatment to obtain regenerated char. The regenerated char prepared by this method can transform waste activated carbon into a regenerated char product with excellent grindability, thereby meeting the requirements of blast furnace injection for fuel particle size and grindability.
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