Anhydrous tap-hole mix samples were selected from different large blast furnaces of five iron works to investigate the preparation method.The firing temperature before preparation and the moulding pressure for the anhydrous tap-hole mix were determined.The necessity of carbonization before testing the high-temperature performance testing of anhydrous tap-hole mix was discussed.The carbonization temperature,time and atmosphere were determined by analyzing the mass loss rate,flexural strength at room temperature,bulk density and apparent porosity of the samples after heat treatment at different temperatures.

"> Blast furnace, Anhydrous tap-hole mix, Firing temperature, Moulding pressure,  , Carbonization treatment