Metal sponge production by reacting metal ore with a reducing gas comprises heating the reducing gas in stages, the temperature in the first stage being directly proportional to the carbon dioxide content

摘要

Producing metal sponge by compressing a feed gas containing carbon monoxide and/or hydrogen, removing carbon dioxide and/or water by adsorption, heating the resulting reducing gas, reacting the gas with a metal ore and withdrawing the off-gas for further use, comprises heating the reducing gas in stages, the temperature in the first stage being directly proportional to the carbon dioxide content of the reducing gas.