| 摘要 |
PROBLEM TO BE SOLVED: To dissolve whole undissolved metal raw material remaining in periphery of furnace inside effectively and quickly without wearing out furnace wall refractory.SOLUTION: When metal raw material is dissolved in an arc-type electric furnace 10, in a period of 0.6-0.8 time of a target weld time from electricity start to the metal raw material to melt-down determined based on past operation performance, undissolved metal raw material 16 remaining in periphery of furnace inside is pushed from an opening 12 penetrating furnace wall 13 into furnace inside more than 50 mm, and the undissolved metal raw material 16 is heated with oxygen blown.SELECTED DRAWING: Figure 1 |
