CN113045321A - 一种低碳转炉出钢口套管砖 - Google Patents
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Abstract
本发明公开了一种低碳转炉出钢口套管砖,包括以下组分:电熔大结晶镁砂、电熔镁铝尖晶石、石墨、氧化铝微粉、金属铝粉、硅粉、碳化硼、CarboresP含碳树脂粉、结合剂、稀土。本发明提供的套管砖抗热冲击性、耐钢水和炉渣的冲刷侵蚀性强,耐高温,具有较低的显气孔率和优良的抗氧化性能,大幅提高了出钢口套管砖的寿命,能满足钢厂快节奏的生产,保障了后续炼钢节奏稳定,提升了生产效率。
Description
技术领域
本发明属于耐火高温材料技术领域,尤其涉及一种低碳转炉出钢口套管砖。
背景技术
出钢口是转炉炼钢不可缺少的功能性耐火材料,其使用寿命直接影响到转炉冶炼周期、炼钢生产效率和挡渣效果,进而影响钢质量。出钢口的完好程度直接关系到转炉下渣量的控制,并对合金收得率及后步处理工序(LF、RH等)带来直接影响。因此,性能优良的出钢口应具有良好的抗热冲击性,高的高温强度,耐钢水和炉渣的侵蚀性,以及优良的抗氧化性能。由于现在钢厂精炼比大幅提高,追求高周转,而一般的出钢口套管砖,寿命只有100多次,不能满足钢厂快节奏的生产,影响了后续炼钢节奏。
因此,研制一种使用寿命长的新型出钢口套管砖是解决问题的关键。
发明内容
本发明在于提供一种低碳转炉出钢口套管砖。
本发明通过以下技术方案实现:包括以下重量份的组分:电熔大结晶镁砂80~90份、电熔镁铝尖晶石0~4份、石墨3~6份、氧化铝微粉0~5份、金属铝粉2~3份、硅粉0.5~1份、碳化硼0~0.5份、Carbores P含碳树脂粉0.5~1份、结合剂2~4份、稀土1~3份。
本发明的有益效果是:本发明提供的套管砖抗热冲击性、耐钢水和炉渣的冲刷侵蚀性强,耐高温,具有较低的显气孔率和优良的抗氧化性能,大幅提高了出钢口套管砖的寿命,能满足钢厂快节奏的生产,保障了后续炼钢节奏稳定,提升了生产效率。
具体实施方式
为了使本技术领域的技术人员能更好地理解本发明的技术方案,下面结合实施例对其具体实施方式进行详细的说明。
为了使本技术领域的技术人员能更好地理解本发明的技术方案,下面结合实施例对其具体实施方式进行详细的说明。
一种低碳转炉出钢口套管砖,包括以下重量份的组分:电熔大结晶镁砂80~90份、电熔镁铝尖晶石0~4份、石墨3~6份、氧化铝微粉0~5份、金属铝粉2~3份、硅粉0.5~1份、碳化硼0~0.5份、Carbores P含碳树脂粉0.5~1份、结合剂2~5份、稀土1~3份。
所述的电熔大结晶镁砂粒度不大于5mm,镁铝尖晶石粒度不大于0.1mm。
所述的氧化铝微粉粒度不大于1μm,金属铝粉粒度不大于0.1mm。
所述的石墨为鳞片石墨,其粒度不大于0.2mm。
所述的硅粉为单质硅粉,其粒度不大于0.1mm。
所述的碳化硼粒度不大于0.1mm。
所述的Carbores P含碳树脂粉粒度不大于0.4mm,Carbores P含碳树脂粉能有效提高材料的高温强度。
进一步的,作为本发明的优选方式,还包括碳黑2~3份,能有效提高低碳镁碳材料的抗渣性和热震稳定性。
进一步的,作为本发明的优选方式,还包括钛白粉0~1份,所述,钛白粉的粒度为280~350目,通过钛白粉促使镁铝尖晶石的生成,提高高温强度和抗氧化性。
一种高强度低碳转炉出钢口套管砖的制备方法,包括如下步骤:
1)分别取电熔大结晶镁砂粉碎至粒度不大于5mm,镁铝尖晶石粉碎至粒度不大于0.1mm,1μm的氧化铝微粉粉碎,325目金属铝粉,100目鳞片石墨,200目硅粉,325目碳化硼粉,Carbores P含碳树脂粉成为原料备用。
2)、把步骤1)制得的各原料按重量份计算称量,电熔大结晶镁砂80~90份、电熔镁铝尖晶石0~4份、石墨3~6份、氧化铝微粉0~5份、金属铝粉2~3份、硅粉0.5~1份、碳化硼0~0.5份、Carbores P含碳树脂粉0.5~1份、结合剂2~5份、稀土1~3份,碳黑2~3,钛白粉0~1份,各原料公差±0.05重量份,并分开备用。
3)、将称量好的电熔大结晶镁砂、电熔尖晶石粉、氧化铝微粉、金属铝粉、单质硅粉、碳化硼、Carbores P含碳树脂粉和二氧化钛,预先用锥形双螺旋预混30分钟,作为混合粉备用。
4)、将称量好的电熔大结晶镁砂投入有冷却循环水的高速混料机内,低速转动1分钟,加入2.5%的结合剂,低速转动2分钟,加入石墨和碳黑,低速转动3分钟,加入混合粉和剩余的结合剂,低速转动3分钟,高速转动5分钟,料温控制在40~55℃,过筛出料成为泥料。
5)、把泥料室温下放置3~4小时困料,采用1000吨双螺旋压砖机压制成型即可。
实施例1
一种低碳转炉出钢口套管砖,包括以下重量份的组分:电熔大结晶镁砂80份、电熔镁铝尖晶石0份、石墨3份、氧化铝微粉0份、金属铝粉2份、硅粉0.5份、碳化硼0份、CarboresP含碳树脂粉0.5份、结合剂2份、稀土1份。
实施例2
一种低碳转炉出钢口套管砖,包括以下重量份的组分:电熔大结晶镁砂85份、电熔镁铝尖晶石2份、石墨4份、氧化铝微粉2份、金属铝粉2.5份、硅粉0.7份、碳化硼0.2份、Carbores P含碳树脂粉0.7份、结合剂3份、稀土2份。
实施例3
一种低碳转炉出钢口套管砖,包括以下重量份的组分:电熔大结晶镁砂90份、电熔镁铝尖晶石4份、石墨6份、氧化铝微粉5份、金属铝粉3份、硅粉1份、碳化硼0.5份、CarboresP含碳树脂粉1份、结合剂5份、稀土3份。
实施例4
一种低碳转炉出钢口套管砖,包括以下重量份的组分:电熔大结晶镁砂80~90份、电熔镁铝尖晶石0~4份、石墨3~6份、氧化铝微粉0~5份、金属铝粉2~3份、硅粉0.5~1份、碳化硼0~0.5份、Carbores P含碳树脂粉0.5~1份、结合剂2~5份、稀土1~3份、碳黑2~3份。
实施例5
一种低碳转炉出钢口套管砖,包括以下重量份的组分:电熔大结晶镁砂80~90份、电熔镁铝尖晶石0~4份、石墨3~6份、氧化铝微粉0~5份、金属铝粉2~3份、硅粉0.5~1份、碳化硼0~0.5份、Carbores P含碳树脂粉0.5~1份、、结合剂2~5份、稀土1~3份,钛白粉0~1份。
实施例6
一种低碳转炉出钢口套管砖,包括以下重量份的组分:电熔大结晶镁砂80~90份、电熔镁铝尖晶石0~4份、石墨3~6份、氧化铝微粉0~5份、金属铝粉2~3份、硅粉0.5~1份、碳化硼0~0.5份、Carbores P含碳树脂粉0.5~1份、结合剂2~5份、稀土1~3份、碳黑2~3份、钛白粉0~1份。
Claims (9)
1.一种低碳转炉出钢口套管砖,其特征在于:包括以下重量份的组分:电熔大结晶镁砂80~90份、电熔镁铝尖晶石0~4份、石墨3~6份、氧化铝微粉0~5份、金属铝粉2~3份、硅粉0.5~1份、碳化硼0~0.5份、Carbores P含碳树脂粉0.5~1份、结合剂2~4份、稀土1~3份。
2.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:所述的电熔大结晶镁砂粒度不大于5mm,镁铝尖晶石粒度不大于0.1mm。
3.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:所述的氧化铝微粉粒度不大于1um,金属铝粉粒度不大于0.1mm。
4.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:所述的石墨为鳞片石墨,其粒度不大于0.2mm。
5.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:所述的硅粉为金属硅粉,其粒度不大于0.1mm。
6.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:所述的碳化硼粒度不大于0.1mm。
7.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:所述的Carbores P含碳树脂粉粒度不大于0.4mm。
8.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:还包括碳黑2份~3份。
9.根据权利要求1所述的低碳转炉出钢口套管砖,其特征在于:还包括钛白粉0~1份,所述,钛白粉的粒度为280~350目。
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CN113979731A (zh) * | 2021-10-22 | 2022-01-28 | 上海利尔耐火材料有限公司 | 一种量子电弧炉无渣出钢用挡渣墙砖及其制备方法 |
CN114477962A (zh) * | 2022-03-10 | 2022-05-13 | 郑州振东科技有限公司 | 一种冶炼铝镇静钢用免粘渣钢包内衬砖 |
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