NOVELTY - A halogen-containing material fuel formation system has a heat carrier supply line (11), a halogen separator (9), a halogen recovery unit (14), and a return line (17). The supply line is connected to a bypass unit (4) which extracts partial high temperature gas from a pre-heater (2). The separator generates combustible gas which directly contacts the halogen-containing material in high temperature gas from the supply line. The recovery unit recovers halogen from high temperature gas. The return line returns high temperature gas to a cement manufacturing equipment.    USE - Use in cement manufacture (claimed).    ADVANTAGE - The halogen-containing material fuel formation system enables smooth processing of halogen-containing material in cement manufacturing equipment. Since high temperature gas with low oxygen concentration is used as high temperature gas contacting the halogen-containing material, the generation of carbon dioxide is suppressed during halogen separation. Since the high temperature gas containing the combustible gas emitted from the thermal decomposition unit is again returned to the cement manufacturing equipment, a large fluctuation is not given to the flow of air exhausted through the pre-heater from the cement kiln. The halogen-containing material fuel formation system also functions as a chlorine bypass in the cement manufacturing equipment.    DETAILED DESCRIPTION - A halogen-containing material fuel formation system has a a heat carrier supply line (11), a halogen separator (9), a halogen recovery unit (14), and a return line (17). The heat carrier supply line is connected to a bypass unit (4) which extracts partial high temperature gas from a pre-heater (2). The halogen separator generates combustible gas which directly contacts the halogen-containing material in the high temperature gas supplied from the heat carrier supply line. The halogen recovery unit recovers halogen from the high-temperature gas containing the combustible gas emitted from the halogen separator. The return line returns the high temperature gas after halogen recovery to the cement manufacturing equipment. The cement manufacturing equipment has a cement kiln (1) which bakes the cement raw material pre-heated and introduced from the pre-heater.    An INDEPENDENT CLAIM is included for the manufacture of cement, which involves using the above halogen-containing material fuel formation system when baking the cement raw material supplied from the pre-heater and manufacturing clinker with a burner provided before the kiln, and burning the residue in a calcination furnace provided inside the cement kiln and/or at the front stage of the cement kiln.    DESCRIPTION OF DRAWING(S) - The figure shows an outline block diagram of a halogen-containing material fuel formation system.    Cement kiln (1)    Kiln bottom side (1a)    Pre-heater (2)    Halogen separator (9)    Heat-carrier supply line (11)    Residue supplier (12)    Halogen recovery unit (14)    Return line (17)