| 摘要 |
An equipment for cooling the bottom of a blast furnace is provided to prevent drop of a steelmaking amount and an ironmaking amount or deterioration of quality by suppressing a temperature increase in the bottom of the blast furnace considering seasonal weather conditions, thereby smoothly performing a blast furnace operation. An equipment(100) for cooling the bottom of a blast furnace comprises: a furnace bottom(10) in which tap holes(11) are formed; and cooling units(20) mounted on the furnace bottom to cool the furnace bottom, wherein the cooling units include a plurality of cooling water moving pipes(21) for cooling tap hole portions of the furnace bottom to a lower temperature and cooling portions except the tap hole portions of the furnace bottom to a temperature higher than that of the tap hole portions, and wherein the cooling water moving pipes include: first cooling pipes which are oppositely mounted on both sides of the furnace bottom such that the first cooling pipes cross the tap hole portions of the furnace bottom, and through which cooling water moves; second cooling pipes which are mounted to transverse a central part of the furnace bottom between the first cooling pipes, and on which a heat exchanger for heating cooling water is mounted, and through which cooling water having a temperature higher than that of the cooling water of the first cooling pipes moves to cool the central part of the furnace bottom to a high temperature; and third cooling pipes which are mounted between the first and second cooling pipes, and on which a heat exchanger for heating cooling water is mounted.
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