Removal of impurities in steel by DC-ESR operation
Reduction of the volume of steel scrap from nuclear plants should become a serious problem in the near future. Remelting of steel scrap without spreading pollutants should be required, and removal of impurities through the operation is preferable if possible. In this study, carbon steel containing Si and stainless steel containing Si or Ce were prepared as simulated scrap, and remelted by direct-current electroslag remelting (DC-ESR) method. The DC-ESR operation was carried out steadily without sparks and splashes under its ordinary operation, and ingots with smooth surface were obtained. The Si content both in the carbon steel and stainless steel ingots became about a half as compared to the original metal under a particular condition, and the Ce content in the stainless steel ingots reached 1/20 of the original metal. The difference between the behaviors of Si and Ce can be explained by their affinities for oxidation and the balance of their atomic contents to the applied current. Thus, the results in this study strongly suggested that the elimination of Si and Ce was made mainly by the electrolysis effect in DC-ESR operation. The DC-ESR method should be effective in the reprocessing of steel scrap from nuclear plants because of its smooth operation and high potential of impurity elimination.
electroslag remelting steel purification nuclear waste Si Ce
Toshihide Takenaka Masatoshi Iizuka
Faculty of of Chemistry, Materials and Engineering, Kansai University, Yamate-cho 3-3-35, Suita 564- Nuclear Technology Research Laboratory, Central Research Institute of Electric Power Industry, Iwado
国际会议
The 3rd Asian Conference on Molten Salts and Ions Liquids 2011(第三届亚洲熔盐与离子液体会议)
哈尔滨
英文
51-54
2011-01-06（万方平台首次上网日期，不代表论文的发表时间）