稀土金属氧化物对MgO晶粒生长动力学影响研究  

Study on effects of rare metal oxide on MgO grain growth dynamics

作　　者：于燕文[1] 牟济宁[1] 

机构地区：[1]宝山钢铁股份有限公司,上海200941

出　　处：《世界钢铁》2010年第4期62-66,共5页World Iron & Steel

摘　　要：制备了添加稀土金属氧化物的高钙镁钙材料试样,研究了添加稀土金属氧化物对MgO晶粒在不同温度下的生长速率的影响,计算得出合成高性能抗水化的高钙镁钙砂在不同合成温度下晶粒生长的活化能。结果表明:无添加剂时,QMgO为1104.02kJ/mol;添加质量分数为1%Y2O3时,QMgO为937.06kJ/mol;添加质量分数为2%Y2O3时,QMgO为922.70kJ/mol。当Y2O3加入量在1%时,氧化钇在1650℃下全部固溶到氧化钙晶格中,导致氧化钙晶格畸变,促进了高钙镁钙材料的烧结,提高了该材料的抗水化能力。这对降低高性能抗水化的高钙镁钙合成原料的能源消耗具有理论指导意义。Refractory samples of MgO-CaO with high CaO content and rare metal oxide addition were prepared.The effets of rare metal oxide on the growth rate of MgO grain at different temperature are studied, and the activation energy of grain growth of high-property anti-hydration MgO-CaO clinker with high CaO content at different synthesis temperature is calculated.The results are as follows：QMgO is 1 104.02 kJ/mol with no additive;QMgO is 937.06 kJ/mol with 1% Y2O3 additive;QMgO is 922.70 kJ/mol with 2% Y2O3 additive.As the content of additive Y2O3 reaches 1%, Y2O3 forms at 1 650℃ a full solid solution into the crystal lattice of calcium oxide, resulting in lattice disturbance of calcium oxide,thus promoting the sintering of MgO-CaO material （wCaO≥50%） and improving the anti-hydration property of the material.That result is of theoretical significance to the reduction of energy consumption during the synthesis of high-property anti-hydration MgO-CaO with high CaO content.

关 键 词：稀土金属氧化物 MgO晶粒 生长动力学 

分 类 号：TQ426.94[化学工程]