1989 Volume 75 Issue 2 Pages 267-274
In the operation of continuous steelmaking plant (CSM process) manufacturing low carbon steel (0.18% C), temperature and analyses of various components, in addition to carbon, of molten iron have been obtained at the cupola outlet and at the steelmaking furnace outlet every 30 min. succesively for more than 24 h. Behavior of the components in the molten iron at the steelmaking furnace outlet was investigated concerning to the mean value and the variation of the data taken at that occasion. Principal results are as follows:
(1) 88-94% of oxygen supplied were consumed for decarburization. Mean value of Mn and P in molten iron were close to their equilibrium concentration with slag, while Cr content in molten iron was less than that deduced from slag composition.
(2) Variation at outlet was composed of 3 factors; contribution of inlet variation, effect of oxygen flow rate and variation brought about in the furnace. Influence of inlet variation on outlet variation was neglegible for C and temperature, considerable for Cr, Mn and P, and predominant for Ni and Cu. An increase of oxygen flow rate decreased C. but raised Cr. Mn. P contents as well as metal temperature at outlet.
