Innovative Application Methods of Slags from High-Temperature-Gasifying-and-Direct-Melting System

JFE High-Temperature Gasifying and Direct Melting Furnace System (hereinafter Gasifying and Melting System) was developed to treat any kind of wastes and to contribute to energy and material recovery. Gasifying and Melting System was developed by integrating company's original technologies for the iron-making blast furnace and fluidized bed for incineration plants, which the company cultivated over many years. The company's advanced technologies in these two different fields were combined and integrated into the unique Gasifying and Melting System. This system is a proven technology that realizes high performance

Wastes are fed into the furnace with coke and limestone from top of the furnace. Coke plays a role as fire grates that keep flow path of gas and slag. Also it works as the heat source and prevents cool-down of slag. Since inside of the furnace reduction atmosphere is kept, hazardous heavy metals are vaporized to the gaseous phase and ash content is converted to slag. The slag discharged from furnace bottom is quenched in a water-granulation conveyor to produce granulated and environmentally safe slag and metals. The raw synthesis gas discharged from the furnace is introduced into the secondary combustion chamber in front of the boiler. Then, the raw synthesis gas is combusted completely in this chamber.

Autor(en)

Masato Katafuchi, Prof. Stanislaw Stryczek, Radoslaw MrÃ³z, Wojciech Wons

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Publikation

Waste Management, Volume 6 (September 2016)

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