COKE PRODUCTION METHOD
The production of coke using torrefied woody biomass with controlled volatile matter and grain size addresses the issue of reduced coke strength, ensuring high-strength coke production by minimizing peeling defects.
BR112025018403A2Pending Publication Date: 2026-07-07NIPPON STEEL CORPORATION
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Patent Information
- Application Number
- BR112025018403
- Authority / Receiving Office
- BR · BR
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-03-01
- Filing Date
- 2024-03-01
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
Existing methods for producing coke using torrefied wood residues result in reduced coke strength due to high volatile matter content and shrinkage, leading to peeling defects during coking.
Method used
A method of producing coke using blended coal with torrefied woody biomass, where the biomass has a volatile matter content of 25% by mass or less and a specific grain size distribution, allowing for suppression of coke strength reduction by adjusting the grain size based on volatile matter content.
Benefits of technology
The method enables the production of high-strength coke by minimizing peeling defects through controlled blending and coking conditions, utilizing torrefied woody biomass with reduced volatile matter and optimized grain size.
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Abstract
Provided is a coke production method with which it is possible to suppress, with a simple procedure, coke strength deterioration due to the use of biomass, while said biomass is contained in blended coal serving as a coke raw material. In one aspect, the present invention provides a coke production method including a step for preparing blended coal containing coal and torrefied woody biomass, and a step for coking said blended coal, wherein: (1) the torrefied woody biomass has a volatile content of 25 mass% or less and has particle sizes such that the mass percentage of particles in the range of 0.10-mm plus sieve and 0.60-mm minus sieve is equal to or greater than 60 mass% according to sieving in conformity to the particle-size testing method defined in JIS M8801:2008; or (2) the torrefied woody biomass has a volatile content that is greater than 25 mass% and equal to or less than 40 mass% and has particle sizes such that the mass percentage of particles in the range of 0.10-mm plus sieve and 0.30-mm minus sieve is equal to or greater than 60 mass% according to said sieving.
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