Method and apparatus for monitoring temperature of blast furnace and temperature control system using temperature monitoring apparatus

A temperature control system for a blast furnace facility comprising:

• an optical fiber wound around and contacting an outside surface of said blast furnace facility;
• temperature measuring means connected to a transmission end of said optical fiber for measuring a temperature distribution of a measuring area of the outside surface of the blast furnace facility, the measuring area comprising portions of the outside surface of the blast furnace facility contacting the optical fiber, the temperature measuring means measuring a temperature distribution based on an intensity of Raman back scattering light from a light pulse transmitted into the optical fiber and further based on a time interval from the transmission of the light pulse until the Raman back scattering light returns to the transmission end of the optical fiber;
• water sprinkling control means for judging when the temperature distribution exceeds a predetermined set temperature and for opening a water spray valve;
• and
• water sprinkling means for sprinkling water on the outside surface of the blast furnace facility, said water sprinkling control means controlling said water sprinkling means.