Castable material used to repair spool of blast furnace

Abstract

The present invention is related to a castable material used to repair the spool of a blast furnace. The castable material includes amorphous silicon dioxide, boron carbides, and a low content of carbon, so that after adding water, the obtained slurry excludes hydrates. The castable material has excellent green strength, explosion resistance, crushing strength, and antioxidant effect, thereby shortening the time length of pre-heating as well as prolonging the campaign cycle of a taphole.