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조성국(Seong Kuk Cho),박흥수(Heung Soo Park),이준석(Junseok Yi),이재달(Jaedal Lee) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
Here, an energy and material recovery system was developed in order to recycle molten blast furnace slag with a temperature near 1400~1500℃. This useful recycling process that produces steam and granulated slag took place in one pressurized water cooling chamber for which a water spraying array was equipped efficiently. Work from the conceptual design to the performance test and analysis was covered in the present development. The system is mainly composed of molten slag injection equipment for which the molten slag is supplied from a slag furnace, a pressurized chamber for slag-water heat transfer, a granulated slag dumper and a condenser to collect steam generated as heat recovery. In comparison with existing heat recovery technologies applying molten iron- and steel-making slags, this recovery facility is designed and installed to simultaneously accomplish the heat recovery that generates steam from water in contact with molten slag and granulated slag formation that is able to be reutilized by replacing clinker in the cement industry. The corresponding results showed 59% in thermal recovery efficiency and 99% in glass content, respectively.