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Coke Making: Most Efficient Technologies for Greenhouse Emissions Abatement

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Clean Ironmaking and Steelmaking Processes
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Abstract

The traditional integrated ironmaking route is based on coke making. Coke provides the support for the materials in the BF as well as acts as reducing agent for the iron oxides increasing temperature through its thermal energy. Coke making is responsible for the 10% of the energy consumption of the integrated ironmaking route; it is a material-intensive process, and it consumes enormous volumes of water. Water is considered as fundamental in the design of sustainable steelmaking routes. In the present chapter, the water treatment solutions, devoted to dangerous compound elimination, are described. Coke making faced important issues related to the increasing environmental pressure, the reduction of the availability of good coking coals, and the need to renew old coke making facilities. Many and different technologies have been developed for integrating or substituting the existing ones in order to reduce the coke needing in the traditional integrated steelmaking plant. CDQ and CSCB are described as efficient solutions. These are examples of how the old coke ovens must be substituted in order to meet the climate protection objectives. The coal moisture control and other plant solutions are analyzed. The energy balance, the plant costs, and the efficiency in the greenhouse emissions abatement per each described solutions are underlined. CSQ (Coke Stabilization Quenching) as an advanced wet quenching system with low environmental impact was underlined. Other emerging technologies that could become important alternatives in the near future are described. For example, the chemical-looping combustion (CLC) of COG, with the objective to improve combustion efficiency and facilitating the capture of the CO2 produced in the system, has been proposed.

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Cavaliere, P. (2019). Coke Making: Most Efficient Technologies for Greenhouse Emissions Abatement. In: Clean Ironmaking and Steelmaking Processes. Springer, Cham. https://doi.org/10.1007/978-3-030-21209-4_2

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