Method and apparatus for recycling top gas for shaft furnace

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United States of America Patent

PATENT NO 10093996
APP PUB NO 20160186276A1
SERIAL NO

14967375

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Abstract

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Method, apparatus and system for improved energy efficiency in a direct reduction iron production process which uses a direct reduction shaft furnace and syngas as the reduction gas. The method and system of the invention use a part of the top gas emanating from the shaft furnace as transport gas for the gasifier, and control the volume of the top gas used as recycled top gas or fuel for the gas heater. The present invention achieves high energy efficiency, and reduces the need to use additional CH4 source for the reduction gas.

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Patent Owner(s)

Patent OwnerAddress
GAS TECHNOLOGY INSTITUTE1700 MOUNT PROSPECT ROAD DES PLAINES IL US 60018-1804

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Michishita, Haruyasu Charlotte, US 12 17
Winter, John D Houston, US 33 375

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