硅砂原料特性对熔铸AZS砖砂型强度的影响  

Influence of Characteristics of Silica Sand on Strength of Sand Mold for Fused Cast AZS Bricks

作　　者：郭子华 余光 李华春 员文杰[1,4] GUO Zi-hua;YU Guang;LI Hua-chun;YUAN Wen-jie(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Beijing SEPR Refractories Co.,Ltd.,Beijing 102202,China;Saint-Gobain Research(Shanghai)Co.,Ltd.,Shanghai 200245,China;National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]北京西普耐火材料有限公司,北京102202 [3]圣戈班研发(上海)有限公司,上海200245 [4]武汉科技大学高温材料与炉衬技术国家地方联合工程研究中心,湖北武汉430081

出　　处：《铸造》2023年第5期576-581,共6页Foundry

摘　　要：为分析硅砂原料特性对砂型强度的影响,对5种不同硅砂酸耗值、含泥量、圆形度以及粒度分布等特性进行表征,分析各特性参数与型砂试样24h抗弯强度的关联度。结果表明:硅砂酸耗值在6mL以下时的差异与砂型强度关联性较低;40^(#)-70^(#)硅砂集中度在95%以上时,含泥量对砂型强度影响较大,当集中度近似在80%以下时,含泥量对强度影响程度变小;5种硅砂圆形度和型砂试样体积密度与其强度有更密切的关联性;采用对数变换值表征法细分40^(#)-70^(#)硅砂得出粒度Φ值的标准差与砂型强度关联性最大。To analyze the influence of characteristics of silica sand on strength of sand mold,the acid demand value,clay content,circularity and size distribution of five different types of silica sands were evaluated.The correlation degrees between the characteristics and the flexural strength of the sand molds after 24 h were analyzed.The results showed that the acid demand values of the silica sand less than 6 mL had a low correlation with the strength of the mold.For 40^(#)-70^(#) silica sand,the clay contents had a great influence on the strength of the mold when the concentration of particle size was more than 95%.If the concentration was approximately below 80%,the strength less depended the clay contents.The circularity of the silica sand and bulk density of the mold had a closer correlation with the flexural strength of the mold.The 40^(#)-70^(#) silica sand was subdivide by the logarithmic transformation method.The standard deviation of Φ value of the particle size presented the greatest correlation with the flexural strength of the sand mold.

关 键 词：原料特性 砂型强度 关联度分析 

分 类 号：TG221[金属学及工艺—铸造]