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通过实验,研究了各种硅铝质耐火材料和碳素材料(包括碳砖和碳化硅)抗碱金属浸蚀的性能。不存在绝对抗碱金属浸蚀的硅铝质耐火材料,但加强原料和炉渣排碱,可以减轻碱金属的浸蚀。碱金属对硅铝质耐火材料的浸蚀机理是形成白榴石、钾霞石、β刚玉和沉析碳素。从而导致砖衬体积膨胀。在高炉条件下,碳素材料比硅铝质耐火材料的抗碱金属浸蚀性能好,碳化硅是炉身下部至炉腹一带较理想的内衬材料。
Through experiments, we studied the anti-alkali metal corrosion resistance of various silicon-aluminum refractories and carbon materials (including carbon brick and silicon carbide). There is no anti-alkali metal erosion resistant silicon aluminum refractory, but to strengthen the raw materials and slag alkali, can reduce the alkali corrosion. Alkali metal etching mechanism of the aluminum-silicon refractory material is the formation of leucite, kernias, β-corundum and hematite. Resulting in brick lining volume expansion. Under blast furnace conditions, carbon materials are more resistant to attack by alkali than silicon-aluminum refractories. Silicon carbide is an ideal lining material for the lower part of the furnace body to the belly.