关键词: 炼钢电弧炉, 烟尘, 沉降室, 耐火材料, 抗侵蚀性

Abstract:

In order to improve the refractory material selection in the settling chamber of EAF steelmaking,the static crucible slag resistance tests of clay brick already used in the settling chamber of EAF steelmaking in Nangang,the proposed silicon nitride bonded silicon carbide brick and magnesia chrome brick were carried out using the soot from the settling chamber of EAF.The results show that:(1)the magnesia chrome brick has the best slag resistance,followed by the silicon nitride bonded silicon carbide brick,and then the clay brick;(2)at high temperatures,SiO₂ and Al₂O₃,the important components of clay brick,are easy to react with liquid soot slag and dissolve into the slag.The wettability of liquid soot slag on silicon nitride bonded silicon carbide brick is poor,and the slag is difficult to penetrate into the brick; however,the silicon nitride bonded silicon carbide brick is easy to oxidize at high temperatures,and the oxidation product SiO₂ is easy to react with the liquid soot slag and dissolves.Although liquid soot slag can penetrate into the magnesia chrome brick,periclase and magnesia chrome spinel,the main components of the magnesia chrome brick,are not easy to react with soot slag.

Key words: steelmaking arc furnace, soot, settling chamber, refractory materials, corrosion resistance