A method and an apparatus for generating a gas containing hydrogen (H2) and carbon monoxide (CO), as a raw material for chemical utilization in, for example, synthesis processes based on export gas from a metallurgical process, are shown. Part of the export gas is subjected to CO conversion with the addition of water vapor, crude synthesis gas with a defined quantity ratio of H2 to CO being formed. Even the water vapor required for CO conversion can be at least partially generated in at least one steam generator in the method.