CN113045321A - 一种低碳转炉出钢口套管砖 - Google Patents

一种低碳转炉出钢口套管砖 Download PDF

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CN113045321A
CN113045321A CN202110046014.7A CN202110046014A CN113045321A CN 113045321 A CN113045321 A CN 113045321A CN 202110046014 A CN202110046014 A CN 202110046014A CN 113045321 A CN113045321 A CN 113045321A
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康冬冬
鲁志燕
陈勇
唐兵
张向前
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Prco Kisc Yunnan Refractories Co ltd
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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

一种低碳转炉出钢口套管砖
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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Application publication date: 20210629