METHODS AND SYSTEMS FOR PRODUCING HIGH CARBON CONTENT METALLIC IRON USING COKE OVEN GAS

摘要

A method for producing high carbon content metallic iron using coke oven gas, including: dividing a top gas stream from a direct reduction shaft furnace into a first top gas stream and a second top gas stream; mixing the first top gas stream with a coke oven gas stream from a coke oven gas source and processing at least a portion of a resulting combined coke oven gas stream in a carbon dioxide separation unit to form a synthesis gas-rich gas stream and a carbon-dioxide rich gas stream; delivering the synthesis gas-rich gas stream to the direct reduction shaft furnace as bustle gas; using the carbon-dioxide rich gas stream as fuel gas in one or more heating units; and delivering the second top gas stream to the direct reduction shaft furnace as bustle gas.

主权项

1. A method for producing high carbon content metallic iron using coke oven gas, comprising:
dividing a top gas stream from a direct reduction shaft furnace into a first top gas stream and a second top gas stream; treating a coke oven gas stream from a coke oven gas source in one or more guard vessels to remove liquid droplets, aerosols, and heavy hydrocarbons from the coke oven gas stream; mixing the first top gas stream with the treated coke oven gas stream and processing at least a portion of a resulting combined gas stream in a selective separation unit to form a synthesis gas-rich gas stream and a carbon-dioxide rich gas stream; delivering the synthesis gas-rich gas stream to the direct reduction shaft furnace as bustle gas; using the carbon-dioxide rich gas stream as fuel gas in one or more heating units; and delivering the second top gas stream to the direct reduction shaft furnace as bustle gas.