NOVELTY - Air is removed from feed material(s) containing organic and inorganic components in a refractory-lined vessel, and partially filled with molten metal and vitreous material and the heat value of the feed material is analyzed. The feed materials are injected directly into molten metal and the composition of molten metal, vitreous material and synthesis gas is monitored. Oxygen and/or additional feed material(s) of higher heat value are co-fed into the molten metal bath. Steam is injected into the portion of the vessel, and synthesis gas and metal and/or vitreous material are removed.    USE - Used for treating feed material chosen from municipal solid waste, refuse derived fuel, construction and demolition waste, waste water sludge and scrap tires (all claimed).    ADVANTAGE - Since steam is injected into the vessel, the temperature of the process is effectively controlled without affecting the synthesis gas output.    DETAILED DESCRIPTION - Air is removed from the feed material(s) containing organic and inorganic components in a refractory-lined vessel having inlet(s) and outlet(s), and partially filled with molten metal and vitreous material and the heat value of the feed material is analyzed. The feed materials are injected directly into molten metal and the composition of the molten metal, the vitreous material and the synthesis gas is monitored. Oxygen and/or additional feed material(s) of higher heat value than the analyzed feed materials are co-fed into the molten metal bath, with the amount injected based on the analysis and monitored results. Steam is injected into the portion of the refractory lined vessel above the molten metal, in an amount based on the analysis and monitored results. Synthesis gas is removed continuously and metal and/or vitreous material are removed periodically through the outlet(s) from the refractory lined vessel.    An INDEPENDENT CLAIM is included for apparatus for processing organic and inorganic feed material.    DESCRIPTION OF DRAWING(S) - The figure shows the flowchart of processing waste stream.