Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2006-01-17
2006-01-17
Andrews, Melvyn (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
Reexamination Certificate
active
06986800
ABSTRACT:
A method and an integrated steel plant wherein, instead of using coke oven gases, converter gases and blast furnace top gases available as fuel for power generation or other heating purposes, these gases are more efficiently utilized as chemical agents for direct reduction of iron ores producing DRI.DRI is charged to blast furnaces increasing production of crude steel without increasing the capacities of the coke oven plant and blast furnaces and without changes in the quality of the crude steel, or, if production rate is maintained, the fossil fuels specific consumption is significantly reduced.Utilisation of primary fossil energy according to the invention also reduces the specific CO2emissions per ton of crude steel. The specific CO2emission in conventional integrated mills is about 1.6 tons of CO2per ton of crude steel.
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Duarte-Escareno Pablo-Enrique
Lizcano-Zulaica Carlos
Zendejas-Martinez Eugenio
Andrews Melvyn
Hylsa, S.A. DE C.V.
Rothwell Figg Ernst & Manbeck P.C.
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