Patent ID: 8882893

Claim:
A method for cleaning a gas flow comprising at least one of top gas, off gas, and export gas from a direct reduction plant or melt reduction plant, which is loaded with dust and/or with fine particulate solids, the method comprising: subjecting the gas flow to a dry cleaning using at least one dry filter, wherein dusts and/or fine particulate raw materials are separated from the gas flow, feeding at least a part of the cleaned gas flow to a CO 2 separating device for CO 2 separation, wherein CO2 and optionally water are separated, thereby forming a product gas that is substantially free of CO 2 and a tail gas that is rich in CO 2 , and introducing at least part of the product gas into the at least one dry filter under a pressure between 1.5 bar g and 12 bar g , thereby backflushing the at least one dry filter and removing the filter cake.