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Global environment problems have become more and more serious in recent years, and reduction of greenhouse gas emission based on Kyoto Protocol adopted at the 3rd conference of the parties of the United nations Framework Convention on Climate Change (COP3); securement of primary energy source and development of clean and renewable energy sources have been pressingly needed in consideration of the predicted depletion of fossil fuel in the future.In this study, we explore the use of a solidified biomass-derived fuel, having the maximum compressive strength of 100MPa and calorific value of 21MJ/kg, in iron-casting or iron-making processes as an alternative fuel to be mixed with coal coke. This study, carried out for internal observation using a quick-freeze technique, observed an actual working cupola furnace under the 20% alternative coal coke operation condition. After quick freeze of the cupola furnace, the solidified biomass fuel was found to inhabit near the iron-melting zone. Especially, this solidified biomass fuel smoothly changes carbonized fuel through high-density state during the operating process. On the other hand, this study tried to simulate gasification combustion under a high temperature environment instead of actual internal combustion of solidified biomass fuel. These combustion mechanisms were confirmed to be similar to diffusion-flame phenomena in general.

Currently, various energies such as fossil fuels and nuclear power are considerable expenditures. Resource depletion and environmental issues are taking place by activation of various problems and economic activity due to population growth in developing countries. However, in order for society to develop, energy, such as natural energy, is required have been studied for this purpose. A variety of energy including conventional type energy is needed. In this study, using Bio-coke that has attracted attention as a natural energy, a research was conducted using rice bran, which is an unused biomass in Thailand. By adding rice bran to 2-mm pulverized wood waste materials in making Bio-coke, it was found that Bio-coke density increased proportionally with increase in rice bran ratio. Results also showed that by adding rice bran in the raw material, it is possible to simultaneously improve both the gross calorific value and cold compressive strength. Moreover, reduction in environmental impact is also possible in the production process by optimizing the production conditions.

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With commercial nuclear power plants from 1966 still running and the price jump ofcoal coke in 2003 ， cupola melting systems has made the transition to electric fUrnaces with cheaper electricity rates at that time ． But after the recent East Japan earthquake ， the resu ］ ting increase in electricity rates ， influenced by the tragedy ， is dictating overseas relocation of these manufacturing companies and thereby threatening to ruin the condition of the domestic industry ． Under these circurnstances ， there is an urgent need for manufacturing companies in this country to envision the next generation ofalternative fuel sourccs by ereating a system that utilizes bi〔Fsolid fUels instead of depending on fossil fUel resources ． ln this stUdy ， a new melting system with specific technical elementS based on Bio − coke is proposed ．