METHOD OF LOWERING DEW POINT OF AMIBIENT GAS WITHIN ANNEALING FURNACE, DEVICE THEREOF, AND METHOD OF PRODUCING COLD-ROLLED ANNEALED STEEL SHEET

• Main Authors: IRI MASATO, FUJII TAKAMASA
• Format: Patent
• Language: English
• Published: 30.04.2015
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

Part of an ambient gas in a heating zone and/or a soaking zone is sucked out and is cooled through a high-temperature gas passage of a heat exchanger by heat exchange with a gas in a low-temperature gas passage, further cooled by mixing with part of an ambient gas in a cooling zone, further cooled through a gas cooler, dehumidified to a dew point of −45° C. or less in a dryer, heated through the low-temperature gas passage of the heat exchanger by heat exchange with a gas in the high-temperature gas passage, and returned to the heating zone and/or the soaking zone.