Disclosed is air separation equipment of ironworks. The air separation equipment of the ironworks according to an embodiment of the present invention includes: a sludge washing and cooling tower for cooling compressed air provided from an air compressor for providing raw material air to provide the air to an air separator; a cooling tower for supplying a coolant heat-exchanged with atmosphere; an argon tank in which an argon liquid separated from the air separator is stored; a heat exchanger for heat-exchanging a cryogenic argon liquid provided in an argon tank and room temperature impure nitrogen provided by being separated from the air separator; and a chiller tower for receiving and storing the coolant from the cooling tower, cooling the stored coolant by latent heat of vaporization of the impure nitrogen cooled in the heat exchanger and supplying the coolant to the water cooling tower. Embodiments of the present invention provide the air separation equipment of the ironworks, which can improve the efficiency of the air separation equipment used in the ironworks.
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