Abstract
This study was carried out for the purpose of industrialization of oxygen enrichment which was not formally possible in spite of many advantages, because of economic problems but which now can be realized with the development of the special gaseous oxygen production equipment that enables the production of oxygen at a low price. For commercialization, first the metalurgical effects had to be grasped, and then an economical method had to be concidered. The acid lined, cold blast and water cooled cupola used for this study has a melting rate of 6 t/hr. As a result of this study, the expected objectives were accomplished as follows : (1) It was possible to decrease the coke ratio from 15% to 13% by oxygen enrichment. (2) The more the oxygen content in the blast air increased, the more the melting rate rose. (3) Oxygen enrichment has superb recovery from unexpected fall of tapping temperature. (4) As for the chemical composition of the metal, it was acknowledged that the carbon content increased and the sulpher content decreased by oxygen enrichment. (5) Economy was obtained with the decrease of coke ratio from 15% to 13%.
