| 摘要 |
<p>This blocking/opening method is a method for blocking a tapping hole formed in the furnace wall of a blast furnace as well as for opening a blocked tapping hole. The method is provided with a blocking process in which, after filling a tapping hole by pressing mud material and a blocking plug therein, the tapping hole is blocked by baking the mud material, and an opening process in which the blocking plug and the baked mud material are excavated to form a tapping hole. The blocking plug has a portion, which is formed to be softer than the baked mud material, extending over the entire length thereof.</p> |
