Method for treating raw material with a treating gas

A method for treating raw material with a treating gas comprising the successive steps of:

• a. mixing, in a mixing chamber, liquid or gaseous fuel and air or oxygen gas in sufficient quantities to obtain complete combustion of said fuel;
• b. ejecting the mixed fuel gas from said mixing chamber into a combustion chamber;
• c. completely burning said mixed fuel gas within said combustion chamber to generate a substantially inert burnt gas containing less than 2% by volume of free oxygen gas;
• d. introducing said burnt gas from said combustion chamber directly into a conditioning chamber having an inner volume of at least 11/2 times that of said combustion chamber without passing said burnt gas through any flow restriction;
• e. introducing at least one additional gas selected from the group consisting of steam, reducing gas, oxidizing gas or inert gas at a specified flow rate into said conditioning chamber simultaneously with the introducing of burnt gas thereinto and uniformly mixing the additional gas with said burnt gas to prepare a uniform treating gas having a desired uniform temperature determined solely by the temperatures of said additional and burnt gases without employing any other heating medium and a desired uniform composition;
• f. introducing said treating gas from said conditioning chamber into a treating chamber separated from said conditioning chamber;
• and
• g. treating a raw material selected from the group consisting of hydrocarbonaceous materials, carbonous materials, metal ores or metal oxides with said treating gas in said treating chamber to obtain a treated raw material product of uniform quality.