Low-carbon preparation of blast furnace burden from iron ore concentrate through cold-bonding: briquetting–curing characteristics and high–temperature strength evolution mechanism
鉄鉱石精鉱からの冷間成型による高炉原料の低炭素製造：ブリケッティング・硬化特性と高温強度発現メカニズム (AI 翻訳)
Xiaolong Wang, Zhiyun Ji, Xiaohui Fan, Min Gan, Shaochun Li, Zengqing Sun, Jiaming Lv, Yanqing Du, Jiasheng Li, Ying Yu, Shengxuan Fan
🤖 gxceed AI 要約
日本語
本研究は、鉄鉱石精鉱を冷間成型（コールドボンドブリケット）する低炭素プロセスを提案。バインダー、圧力、水分、硬化条件の最適化により、高炉原料として必要な強度を実現し、CO2排出量を焼結・ペレタイジングより大幅削減できることを示した。高温強度保持メカニズムも解明。
English
This study proposes a low-carbon cold-bonding briquetting process for iron ore concentrate to produce blast furnace burden. By optimizing binder, pressure, moisture, and curing, the briquettes meet cold-strength requirements for BF burden and achieve CO2 emissions of 36.59 kg/t, significantly lower than sintering and pelletizing. The high-temperature strength evolution mechanism is also clarified.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本鉄鋼業はカーボンニュートラルに向けた革新的技術開発が急務。本研究成果は非加熱プロセスによるCO2削減可能性を示し、日本製鉄やJFEスチールなど国内高炉メーカーにとって、既存設備を活用した低炭素移行の選択肢となりうる。
In the global GX context
Steelmaking is a hard-to-abate sector critical for global net-zero. This cold-bonding technology offers a low-Capex, low-emission alternative to conventional sintering, aligning with IEA's net-zero pathways and ISSB/TCFD disclosure on transition planning.
👥 読者別の含意
🔬研究者:Provides a novel processing-structure-property framework for iron ore briquetting, offering mechanistic insights for further optimization.
🏢実務担当者:Presents a potential low-emission alternative for ironmaking that could reduce Scope 1 emissions and energy costs.
🏛政策担当者:Supports policy incentives for low-carbon ironmaking technologies, contributing to national decarbonization targets.
📄 Abstract（原文）
Under the “dual-carbon” targets, low-carbon preparation of blast furnace (BF) burden is of great importance. Cold-bonded briquetting avoids high-temperature processing and can reduce CO 2 emissions. This study examined the briquetting–curing behavior of iron ore concentrate and clarified the high-temperature strength evolution of cold-bonded briquettes (CBBs) and the binder action mechanism. The results showed that binder type, briquetting pressure, briquetting moisture, and curing schedule affected CBB performance. With 2.4 wt.% composite binder and selected conditions (1.0 t/mm line pressure, 4.5 wt.% moisture, curing at 100 °C for 40 min), the wet briquettes achieved a drop number of 5.4 times and a compressive strength of 96 newtons per briquette (N/P). The cured CBBs reached a compressive strength of 3396 N/P and a tumbler index (TI) of 90.57%, meeting the basic cold-strength requirements for BF burdens. The high-temperature compressive strength reached a minimum of 2009 N/P at 500 °C. Interfacial reactions between the inorganic binder component and the concentrate formed strengthened bonding and supported strength retention. Based on these results, a low-temperature preparation flow of iron ore concentrate-based CBBs was summarized. Under the simplified accounting boundary, the estimated CO 2 emission was 36.59 kg·t -1 , indicating potential emission reduction compared with sintering and pelletizing. This work clarifies the processing-structure-property relationship of iron ore concentrate-based CBBs and provides mechanistic support for their further evaluation as potential low-carbon BF burdens.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.jmrt.2026.06.120first seen 2026-06-17 05:11:17 · last seen 2026-06-17 07:12:45
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