Influence of carbonaceous materials on the interactions among (Al2O3-C)/Fe system with temperature and soaking time

It has practical significance for improving the service life of Al2O3-C refractories and reducing its influence on steel quality to reveal the reaction mechanism among (Al2O3-C)/Fe system under high temperature. The influence of carbonaceous materials on the interactions among (Al2O3-C)/Fe system with temperature and soaking time were studied using thermalgravity method in this paper in order to get a better understanding on the reaction mechanism among (Al2O3-C)/Fe system. The weight loss of (Al2O3-C)/Fe samples and the formation of Al2O3 crystal whiskers along with the change of aluminium and carbon content in iron indicates the mechanism of the effects of carbonaceous materials on the reactions among (Al2O3-C)/Fe system under high temperature. The result showed that the aluminium pickup of iron was not only due to the dissolution of Al2O3 in molten iron but mostly due to the carbothermic reduction of Al2O3 and carbonaceous materials in the presence of molten iron.