The present invention provides a gas cooling and dust recovery apparatus of a steelmaking converter that makes it possible to use the gas as a useful fuel by cooling the high-temperature gas generated from the steelmaking converter using lubricating oil and removing the dust contained in the gas. Its purpose is to.;The present invention for achieving the above object, the nozzle for injecting lubricating oil to cool the high-temperature gas supplied to the casing (11) and remove the dust contained in the gas, and the inside of the casing is cooled to cool the gas It includes an LNG supply unit 13 for supplying the LNG. The present invention also provides a separator 21 for separating dust and water removed by lubricating oil from lubricating oil, a drain valve 33 and a separator 21 for discharging dust and water separated from the separator 21 to the outside. Level gauges 17 and 18 for measuring the amount of lubricating oil and dust and water to be stored, and a control unit for opening and closing the drain valve 33 in accordance with the amount of lubricating oil, dust and water measured by the level gauges 17 and 18 ( 19). Then, the clean lubricating oil separated from the separator 21 is cooled through the cooling device 31 and then re-injected through the nozzle.
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