ON THE SHORTENING OF REDUCING PERIOD IN THE ELECTRIC FURNACE SMELTING
FANG BING;SUENG I-KWANG;HOO CHWANG-CHI;HO CHEIN-CHU;LIU CHENG-CHI;WANG CHING-TANG AND HSING CHUNG-SHU Institute of Metal Research;Academia Sinica
Cite this article:
FANG BING;SUENG I-KWANG;HOO CHWANG-CHI;HO CHEIN-CHU;LIU CHENG-CHI;WANG CHING-TANG AND HSING CHUNG-SHU Institute of Metal Research;Academia Sinica. ON THE SHORTENING OF REDUCING PERIOD IN THE ELECTRIC FURNACE SMELTING. Acta Metall Sin, 1956, 1(4): 311-324.
Abstract Experiments were carried out with the purpose of shortening the reducingperiod in small basic electric furnace for carbon steels of various carbon content.In some of the experimental heats reducing period was shortened by 20 mi-nutes and the others were made according to the normal procedure of the works.For some of the low carbon steel heats,the amount of ferro-silicon powder wasincreased by 20% and added in advance.The results,obtained from heats of shorterreducing period,show that the deoxidation and desulphurization appear to be ascomplete as that of a normal heat,the content of nitrogen and non-metallic in-clusions being much less.In addition,the results on mechanical properties showthat in the case of medium carbon steel,the impact value is higher,and in thecase of low carbon steel the percentage of elongation and the rate of reductionof area are also slightly superior although the yield strength becomes somewhatlower.Such a shortening of reducing period also results in a 7% increase ofthe rate of production.It is suggested that in electric steel smelting process theappropriate deoxidation procedure and the length of reducing period should varyin accordance with different carbon content of the steel.A relationship of[S]/[O]=1.2—2.2 at the end of reducing period was ob-served,and the possibility of further shortening of the reducing period in makingmedium and high carbon steel was also pointed out.
