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국내자원을 활용한 가탄재의 (加炭材) 개발에 관한 연구 (2)
최정길,김동옥 ( J . K . Choi,D . O . Kim ) 한국주조공학회 1982 한국주조공학회지 Vol.2 No.3
N/A For the purpose of development of domestic carburizer, when the basicity of ash in carburizer was changed from Na₂O/Al₂O₃+ SiO₂; 0.06 to Na₂O/Al₂O₃+SiO₂: 0,196wt%, using Na₂O as flux for domestic graphite resource (Bong Myung armorphous graphite), carburizing efficiency was improved as basicity increased, optimum basicity value was Na₂O/Al₂O₃+ SiO₂; 0.151. This means that Na₂O contributed to lower viscosity of slag and raise occurence probability of specific reaction surface between molten iron and carburizer. The experiment of effect of general characteristics offecting carburizing ability of this carburizer was performed, the result is that 10/30 mesh was optimum size of the carburizer and as carbon equivalent of molten iron was higher, carburizing ratio was lowered, but when si concentration was below 1.8% in general cast iron melting region, recovery showed 75-85%. As agitation rate of molten iron and temperature interval were higher, Carburizing ratio was increased and showed max, 94%. Desulfurizing phenomena of molten iron by Na₂O in carburizer didn`t appear.