Effects of Temperature of Molten Steel and Carbon on Corrosion of Magnesia Alumina Spinel Refractory
DU Jingyun1，MA Beiyue1，NIE Licheng2，YAN Yongliang3，YU Jingkun1
1. School of Materials and Metallurgy, Northeastern University Shenyang 110004, Liaoning, China; 2. SteelMaking Plant, Anshan Iron and Steel Co Ltd, Anshan 114000, Liaoning, China; 3. SteelMaking Plant, Baoshan Iron and Steel Co Ltd, Shanghai 201900, China
Abstract：Thermodynamic analysis and hot condition experiment were used to study the effects of temperature of molten steel and mass fraction of carbon on the corrosion of magnesia alumina spinel refractory, and the corrosion mechanism was discussed. The results show that the corrosion of molten steel on the refractory could be aggravated and the corrosion index of the refractory increased and then decreased with the increasing of the mass fraction of carbon in molten steel. The corrosion mechanism included two respects, one was the chemical corrosion on the refractory surface by the reaction between carbon and magnesia, the other was the penetration of the molten steel into the refractory and the precipitation of the low meltpoint compounds at interface between grains of the refractory, which would weaken the combining power of grains and aggravate the brokendown of the refractory caused by washing out of molten steel.
杜景云1 ，马北越1 ，聂立诚2 ，严永亮3 ，于景坤1. 钢水温度和碳对镁铝尖晶石质耐火材料侵蚀的影响[J]. 中国冶金, 2007, 17(12): 32-32.
DU Jingyun1，MA Beiyue1，NIE Licheng2，YAN Yongliang3，YU Jingkun1. Effects of Temperature of Molten Steel and Carbon on Corrosion of Magnesia Alumina Spinel Refractory. China Metallurgy, 2007, 17(12): 32-32.
