NOVELTY - Water vapor is added to gas generated from a melting reducing furnace and the temperature is set so that the amount of hydrogen and carbon monoxide in gas is in a ratio of 2:1. A shift reaction is carried out and methanol is produced by reacting hydrogen and carbon monoxide, after removing water and carbon dioxide.    USE - Used for production of methanol and ammonia.    ADVANTAGE - Methanol is produced in large quantity without removing carbon monoxide or supplying hydrogen from another manufacturing equipment. Carbon monoxide is also used efficiently, so that economical efficiency of the melting reduction furnace is improved. Water vapor is generated using surplus heat energy of the gas, so that supply of energy is not required and the furnace is not operated continuously. Methyl tertiary butyl ester is produced efficiently. Nitrogen generated as a by-product during the production of oxygen is effectively used for producing ammonia, so that equipment for producing nitrogen is not required and manufacturing cost of ammonia is reduced. Urea is produced efficiently by controlling an installation cost and operating cost. Since compression of gas during the synthesis of ammonia or methanol is performed by using water vapor, energy supply is not required, so that economical efficiency of the furnace is further increased. The catalyst flows smoothly and contacts the gas in a large area and hence the active reaction is accelerated.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a melting reducing furnace apparatus comprising a melting reducing furnace (1), boiler (11), dust collector (12), shift reaction device (13), carbon dioxide removal apparatus (13W) and a synthesis reactor for synthesizing methanol or ammonia. The shift reaction device is used for setting the temperature or pressure of the gas at the upstream side.    DESCRIPTION OF DRAWING(S) - The figure shows the apparatus for producing methanol and methyl tertiary butyl ether using melting reducing furnace gas. (Drawing includes non-English language text).    Melting reducing furnace (1)    Pre-reduction furnace (2)    Boiler (11)    Dust collector (12)    Shift reaction device (13)    Carbon dioxide removal apparatus (13W)    Synthesis reactor (14)