CN115536410A - 一种低碳镁碳砖及其制备方法 - Google Patents

一种低碳镁碳砖及其制备方法 Download PDF

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CN115536410A
CN115536410A CN202211310028.6A CN202211310028A CN115536410A CN 115536410 A CN115536410 A CN 115536410A CN 202211310028 A CN202211310028 A CN 202211310028A CN 115536410 A CN115536410 A CN 115536410A
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王成霖
赵现华
张义先
马嘉梁
金钊
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Haicheng Lier Maige Xita Material Co ltd
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Abstract

本发明提供一种低碳铝镁碳砖及其制备方法，所述低碳铝镁碳砖由如下原料按重量份比例制成：高铝矾土50‑70重量份、电熔镁砂10‑20份、铝镁尖晶石粉15‑25份、铝钙渣粉4‑6份、石墨0.5‑1份、活性氧化铝微粉2‑4份、氮化硅0.2‑0.4份、酚醛树脂8‑10份、十二烷基苯磺酸钠0.2‑0.4份；通过对低碳铝镁碳砖的原料成分进行优化以及选用新型外加剂，实现改善低碳铝镁碳砖抗侵蚀性、抗热震性和抗渣性的目的。

Description

一种低碳镁碳砖及其制备方法
技术领域
本发明涉及耐火材料制备技术领域的一种定型耐火材料，是一种低碳铝镁碳砖及其制备方法。
背景技术
铝镁碳砖是以特级高铝矾土或刚玉砂、镁砂和鳞片状石墨为主要原料翻成的衬火制品。其特征是在高温下除了因含碳具有高耐侵蚀性和不易剥落的优点外，还具有因使用时受热生成尖晶石而显示出高的残余线膨胀率的优点，因而成为新发展的优质衬砖。它具有较好的抗渣侵蚀性和抗热震性，有微量的重烧膨胀。铝镁碳砖具有抗侵蚀、抗剥落、均衡侵蚀、使用安全、沾钢沾渣少、拆包容易等优点。主要用于使用条件苛到的钢水罐内衬。在连铸大型中间包和炉外精炼包的熔池部位和包底部位用铝镁碳砖作内衬日益增多。
现有技术中，钢包低碳碳复合耐火材料在钢包的精炼生产中还存在一些不足之处，比如：抗渣性、抗热震性、使用寿命还有待于提高。原料成分在钢水的精炼过程中还需要进一步优化。
发明内容
本发明的目的是提供一种低碳铝镁碳砖及其制备方法，通过对低碳铝镁碳砖的原料成分进行优化以及选用新型外加剂，实现改善低碳铝镁碳砖抗侵蚀性、抗热震性和抗渣性的目的。
为了达到上述目的，本发明采用以下技术方案实现：
一种低碳铝镁碳砖，所述低碳铝镁碳砖由如下原料按重量份比例制成：高铝矾土50-70重量份、电熔镁砂10-20份、铝镁尖晶石粉15-25份、铝钙渣粉4-6份、石墨0.5-1份、活性氧化铝微粉2-4份、氮化硅0.2-0.4份、酚醛树脂8-10份、十二烷基苯磺酸钠0.2-0.4份；
所述的高铝矾土的粒度级配为：3mm≤粒度＜5mm的高铝矾土10～15份；1mm≤粒度＜3mm的高铝矾土15～20份；粒度小于1mm的高铝矾土22～25份；
所述的电熔镁砂的粒度级配为：3mm≤粒度＜5mm的电熔镁砂5～10份；1mm≤粒度＜3mm的电熔镁砂10～15份；粒度小于1mm的电熔镁砂15～20份。
所述铝镁尖晶石粉的粒度为≤0.15mm；铝钙渣粉的粒度为≤0.15mm；活性氧化铝微粉的粒度≤0.008mm。
所述的原料成分中，还加入稀土氧化物2-4份。
所述的原料成分中，还加入刚玉细粉10-15份，所述的刚玉细粉的粒度≤0.15mm。
所述的低碳铝镁碳砖的制备方法，包括以下步骤：
1)首先将原料中的高铝矾土、电熔镁砂、铝镁尖晶石粉、石墨、及活性氧化铝微粉进行预混合，混合均匀；然后再加入高铝矾土、电熔镁砂、颗粒状原料，混匀；
2)再加入酚醛树脂、十二烷基苯磺酸钠，混合均匀，混炼后，在压砖机中成型，制成砖坯；
3)将铝钙渣粉和氮化硅的混合物熔融成液态，浇筑在砖坯外表面，制成成品。
与现有技术相比，本发明的有益效果是：
本发明通过优化原料的组成成分和添加复合添加剂，使产品具有优异的抗渣性能和热震稳定性能，具体如下：
1)采用低碳无磷镁铝不烧砖，避免了钢水的增碳问题，消除了钢水的磷污染。
2)通过复合添加剂的添加，提高了材料的密度和热震稳定性。
3)超细微原料的使用，促进了产品在生产过程中的烧结，降低了热损耗，避免了钢水的增碳。
4)将铝钙渣粉和氮化硅的混合物熔融成液态，浇筑在砖坯外表面，制成成品。该制作方法使得砖坯外部形成了覆盖层，使得各组成的结合更加坚韧，提高了产品的强度和抗热震性能，使得产品具有非常好的抗渣性和抗冲刷性能。大大提高了产品的使用寿命。
具体实施方式
下面通过具体实施例对本发明作进一步详细叙述。
实施例1：
一种低碳铝镁碳砖，所述低碳铝镁碳砖由如下原料按重量份比例制成：高铝矾土51重量份、电熔镁砂12份、铝镁尖晶石粉16份、铝钙渣粉5份、石墨0.5份、活性氧化铝微粉2.1份、氮化硅0.25份、酚醛树脂8份、十二烷基苯磺酸钠0.23份；
所述的高铝矾土的粒度级配为：3mm≤粒度＜5mm的高铝矾土11份；1mm≤粒度＜3mm的高铝矾土16份；粒度小于1mm的高铝矾土23份；
所述的电熔镁砂的粒度级配为：3mm≤粒度＜5mm的电熔镁砂6份；1mm≤粒度＜3mm的电熔镁砂12份；粒度小于1mm的电熔镁砂16份。
所述铝镁尖晶石粉的粒度为≤0.15mm；铝钙渣粉的粒度为≤0.15mm；活性氧化铝微粉的粒度≤0.008mm。
所述的低碳铝镁碳砖的制备方法，包括以下步骤：
1)首先将原料中的高铝矾土、电熔镁砂、铝镁尖晶石粉、石墨、及活性氧化铝微粉进行预混合，混合均匀；然后再加入高铝矾土、电熔镁砂、颗粒状原料，混匀；
2)再加入酚醛树脂、十二烷基苯磺酸钠，混合均匀，混炼后，在压砖机中成型，制成砖坯；
3)将铝钙渣粉和氮化硅的混合物熔融成液态，浇筑在砖坯外表面，制成成品。
实施例2：
一种低碳铝镁碳砖，所述低碳铝镁碳砖由如下原料按重量份比例制成：高铝矾土60重量份、电熔镁砂15份、铝镁尖晶石粉18份、铝钙渣粉5份、石墨0.6份、活性氧化铝微粉3份、氮化硅0.27份、酚醛树脂9份、十二烷基苯磺酸钠0.3份；稀土氧化物氧化镧粉3份。
所述的高铝矾土的粒度级配为：3mm≤粒度＜5mm的高铝矾土14份；1mm≤粒度＜3mm的高铝矾土17份；粒度小于1mm的高铝矾土23份；
所述的电熔镁砂的粒度级配为：3mm≤粒度＜5mm的电熔镁砂8份；1mm≤粒度＜3mm的电熔镁砂12份；粒度小于1mm的电熔镁砂18份。
所述铝镁尖晶石粉的粒度为≤0.15mm；铝钙渣粉的粒度为≤0.15mm；活性氧化铝微粉的粒度≤0.008mm；稀土氧化物氧化镧粉的粒度≤0.008mm；
所述的低碳铝镁碳砖的制备方法，包括以下步骤：
1)首先将原料中的高铝矾土、电熔镁砂、铝镁尖晶石粉、石墨、及活性氧化铝微粉、氧化镧粉进行预混合，混合均匀；然后再加入高铝矾土、电熔镁砂、颗粒状原料，混匀；
2)再加入酚醛树脂、十二烷基苯磺酸钠，混合均匀，混炼后，在压砖机中成型，制成砖坯；
3)将铝钙渣粉和氮化硅的混合物熔融成液态，浇筑在砖坯外表面，制成成品。
实施例3：
一种低碳铝镁碳砖，所述低碳铝镁碳砖由如下原料按重量份比例制成：高铝矾土55重量份、电熔镁砂12份、铝镁尖晶石粉20份、铝钙渣粉5份、石墨0.8份、活性氧化铝微粉3份、氮化硅0.3份、酚醛树脂9份、十二烷基苯磺酸钠0.2份；稀土氧化物氧化镧粉2份、刚玉细粉12份。
所述的高铝矾土的粒度级配为：3mm≤粒度＜5mm的高铝矾土12份；1mm≤粒度＜3mm的高铝矾土16份；粒度小于1mm的高铝矾土23份；
所述的电熔镁砂的粒度级配为：3mm≤粒度＜5mm的电熔镁砂6份；1mm≤粒度＜3mm的电熔镁砂12份；粒度小于1mm的电熔镁砂16份。
所述铝镁尖晶石粉的粒度为≤0.15mm；铝钙渣粉的粒度为≤0.15mm；所述的刚玉细粉的粒度≤0.15mm；活性氧化铝微粉的粒度≤0.008mm；稀土氧化物氧化镧粉的粒度≤0.008mm。
所述的低碳铝镁碳砖的制备方法，包括以下步骤：
1)首先将原料中的高铝矾土、电熔镁砂、铝镁尖晶石粉、刚玉细粉、石墨、稀土氧化物氧化镧粉及活性氧化铝微粉进行预混合，混合均匀；然后再加入高铝矾土、电熔镁砂、颗粒状原料，混匀；
2)再加入酚醛树脂、十二烷基苯磺酸钠，混合均匀，混炼后，在压砖机中成型，制成砖坯；
3)将铝钙渣粉和氮化硅的混合物熔融成液态，浇筑在砖坯外表面，制成成品。

Claims (4)

1.一种低碳铝镁碳砖，其特征在于，所述低碳铝镁碳砖由如下原料按重量份比例制成：高铝矾土50-70重量份、电熔镁砂10-20份、铝镁尖晶石粉15-25份、铝钙渣粉4-6份、石墨0.5-1份、活性氧化铝微粉2-4份、氮化硅0.2-0.4份、酚醛树脂8-10份、十二烷基苯磺酸钠0.2-0.4份；
所述的高铝矾土的粒度级配为：3mm≤粒度＜5mm的高铝矾土10～15份；1mm≤粒度＜3mm的高铝矾土15～20份；粒度小于1mm的高铝矾土22～25份；
所述的电熔镁砂的粒度级配为：3mm≤粒度＜5mm的电熔镁砂5～10份；1mm≤粒度＜3mm的电熔镁砂10～15份；粒度小于1mm的电熔镁砂15～20份。
所述铝镁尖晶石粉的粒度为≤0.15mm；铝钙渣粉的粒度为≤0.15mm；活性氧化铝微粉的粒度≤0.008mm。
2.根据权利要求1所述的一种低碳铝镁碳砖，其特征在于，所述的原料成分中，还加入稀土氧化物2-4份。
3.根据权利要求1或2所述的一种低碳铝镁碳砖，其特征在于，所述的原料成分中，还加入刚玉细粉10-15份，所述的刚玉细粉的粒度≤0.15mm。
4.根据权利要求1～3任意一项所述的低碳铝镁碳砖的制备方法，其特征在于，包括以下步骤：
1)首先将原料中的高铝矾土、电熔镁砂、铝镁尖晶石粉、石墨、及活性氧化铝微粉进行预混合，混合均匀；然后再加入高铝矾土、电熔镁砂、颗粒状原料，混匀；
2)再加入酚醛树脂、十二烷基苯磺酸钠，混合均匀，混炼后，在压砖机中成型，制成砖坯；
3)将铝钙渣粉和氮化硅的混合物熔融成液态，浇筑在砖坯外表面，制成成品。
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