酚醛树脂加入量对钢包渣线再生镁碳砖性能的影响

摘要

The regenerated magnesia carbon bricks were prepared with recycled material of used magnesia carbon brick in ladle slag line. Influences of phenolic resin addition (3. 25%,3. 5%,3. 75%,4. 0%,and 4.25% in mass percent) on density, strength, and oxidation resistance of regenerated bricks with 80 mass% recycled material addition were researched. The results show that:(l)with phenolic resin addition increasing,density,CCS,CMOR,and HMOR of specimens fired at 200 °C increase and oxidation resistance is improved;(2)with the increase of phenolic resin addition,density of specimens carbon-embedded fired at 900 °C increases, but it changes a little when the phenolic resin addition is over 4 mass%;(3) the suitable addition of phenolic resin is 3.5 /nass%-4 mass% in regenerated magnesia carbon brick.%利用钢包渣线用后镁碳砖再生料制备了钢包渣线再生镁碳砖,在再生料加入质量分数为80％的基础上,研究了酚醛树脂5323加入量(质量分数分别为3.25％、3.5％、3.75％、4.0％、4.25％)对再生镁碳砖致密度、强度和抗氧化性的影响.结果表明:1)随着酚醛树脂加入量的增加,200℃热处理后再生镁碳砖的致密度、常温耐压强度、常温抗折强度及高温抗折强度均增大,抗氧化性增强；2)随着酚醛树脂加入量的增加,900℃埋炭处理后试样的致密度增大,但当酚醛树脂加入量(w)达到4％后其致密度变化不大；3)再生镁碳砖中酚醛树脂加入量(w)以3.5％ ～4％为宜.