Abstract: Apparatus for the production of gaseous mixtures is disclosed wherein said apparatus includes a combustion chamber, and burner means for blending a mixture of oxidizing gas and a primary fuel causing the mixture to assume a highly turbulent compact and self-contained configuration within the combustion chamber while totally combusting the mixture. The apparaus also includes fuel means for introducing a secondary fuel into the chamber to form a sheath around the self-contained configuration for mixing and reacting with the products of combustion therein to produce the gaseous mixture. Gaseous mixtures are suitable for use as agents for synthesis process raw materials.