To improve the heating efficiency of a ladle, in which the atmosphere temperature in the ladle can be heated to high temperature so that the combustion exhaust gas temperature at outlet side of a heat-storage body does not exceed the heat-resistant temperature of a member for supporting the heat-storage body and a switch valve for changing over interposed in the exhaust gas piping.
The upper opening part of the ladle 1 is closed with a ladle cover 12 fitting one pair of burner parts 112a, 112b alternately executing the supply of the air for combustion and the exhaust of the combustion exhaust gas through the heat- storage bodies 113a, 113b. In this state, one pair of the burner parts 112a, 112b are alternately burnt in the ladle 1 and also, the combustion exhaust gas is exhausted and recovered through the exhaust gas piping 123 by passing through the heat-storage body 113b at the burner 112b side during stopping the combustion. In this way, in the method for rapidly heating the ladle 1, the combustion exhaust gas temperature at the outlet side of the heat-storage body 113b is measured with a thermometer Tb and a flow-rate adjusting valve 125 interposed in the exhaust gas piping 123 is controlled based on this measured temperature to control the recovering amount of the combustion exhaust gas.
ADACHI KAZUNARI
NOMURA HIROSHI
SUDA MAMORU
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