Abstract
H2 CO and CO2 were measured during the producing process. The results were as follows: (1) At the initial and the final stages of melting process, H2 tends to be abundant but less at the middle stage. (2) H2 increasing as the result of reaction between heated nickel and H2O of the ladle, and penetrating into nickel was extremely decreased by hot rolling, (3) CO and CO2 tend to increase at the melt down stage,but to decrease in deoxidizing process. The decreasing tendency of CO2 is more marked than with CO. (4) In deoxidizing, decrease of NiO is observable by a microscopic photograph and this tendency agrees with the measurement results of degassing.
