| 摘要 |
<p>The present invention relates to an oxygen lancing pipe apparatus comprising: a pipe main body; an oxygen pipe installed inside the pipe main body to generate the high temperature heat in the end by injecting oxygen inside the blast furnace; and a replacement announcing means installed between the pipe main body and the oxygen pipe, and arranged more inside than the wall of the blast furnace when being arranged inside the blast furnace to announce the replacement time by being melted with the oxygen pipe and the pipe main body which gets shorter by being melted by the high temperature heat in the end of the oxygen pipe. According to the present invention, the damage to the wall of the blast furnace can be prevented since the replacement announcing means senses that the replacement announcing means gets shorter gradually while being melted by the high temperature heat generated by the injected oxygen before the wall of the blast furnace is damaged by arranging the replacement announcing means more inside than the wall of the furnace blast when the replacement announcing means is arranged inside the blast furnace. Moreover, the flowage inside the blast furnace can be secured in advance by maintaining heat balance by reinforcing an insufficient heat source since fuel gas is injected in an oxygen lancing step.</p> |
