High-Efficiency Technology of Iron Carburization using Biomass char by which carbon crystallinity is controlled.

使用木炭代替化石燃料是减轻钢铁工业二氧化碳排放的可能技术之一，因为木炭可被视为“碳中性”材料。本研究探讨了利用木炭作为碳源进行增碳反应的可能性；研究了炭的结晶度和灰分对铁液中碳的溶解和铁炭复合材料中铁的渗碳反应的影响。从这些调查中，揭示了以下结果。炭在1273K低温下热处理，有利于碳在铁浴中溶解反应。木炭灰强烈地阻止了铁和碳之间的增碳反应。

Charcoal use instead of fossil fuel is one of the possible technologies for mitigation of CO2 emission in the steel industry because charcoal can be considered as“carbon-neutral"material. In this study, the possibility of utilization of charcoal as carbon source for carburization reaction was examined ; more specifically effects of carbon crystalinity and ash in charcoal on carbon dissolution into molten iron and iron carburization reaction in iron-charcoal composite were investigated. From these investigations, following results were revealed. Charcoal heat-treated at low temperature, 1273K, has advantage for carbon dissolution reaction into iron bath. Charcoal ash strongly prevents the carburization reaction between iron and carbon.