CN108821787A - 一种低碳Al2O3-C耐火材料及其制备方法 - Google Patents
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Abstract
本发明提供了一种低碳Al2O3‑C耐火材料,由如下重量份的组分制成:刚玉颗粒50‑60份,刚玉细粉20‑30份,活性ɑ‑Al2O3微粉5‑6份,硅粉4‑5份,铝粉9‑10份,纳米炭黑0.6‑0.8份,石墨烯1‑2份,膨胀石墨0.2‑0.5份和液态酚醛树脂5‑6份。本发明所述的低碳Al2O3‑C耐火材料,通过控制颗粒粒度级配和纳米炭黑、石墨烯和膨胀石墨的协同增强增韧作用,可以制备出强度高,抗热震性好的低碳铝碳耐火材料。本发明还提供了所述低碳Al2O3‑C耐火材料的制备方法,该制备方法通过对各原料组分的加入顺序及工艺参数的设定,制备出了性能优良的低碳Al2O3‑C耐火材料。
Description
技术领域
本发明涉及耐火材料技术领域,特别是涉及一种低碳Al2O3-C耐火材料及其制备方法。
背景技术
传统铝碳耐火材料(10-30wt%C)兼具良好的耐高温、抗热震、抗渣侵蚀等性能而被广泛地用作水口、滑板和塞棒等关键部位的功能性耐火材料,但随着高效连铸、洁净钢冶炼等技术的发展,开发优质低碳铝碳耐火材料(<5wt%C)刻不容缓。但是,单纯地降低铝碳耐火材料中的石墨含量又会明显削弱材料的抗渣侵蚀性和抗热震性。近期,研究发现在镁碳耐火材料中引入纳米技术来降低碳含量是制各高性能、低碳化耐火材料的一种重要方法,但复合碳源在低碳铝碳耐火材料的分散问题还有待进一步研究。
发明内容
针对上述技术问题,本发明的目的在于提供一种低碳Al2O3-C耐火材料,本发明还提供了所述低碳Al2O3-C耐火材料的制备方法。
本发明采用的技术方案是:
一种低碳Al2O3-C耐火材料,由如下重量份的组分制成:刚玉颗粒50-60份,刚玉细粉20-30份,活性ɑ-Al2O3微粉5-6份,硅粉4-5份,铝粉9-10份,纳米炭黑0.6-0.8份,石墨烯1-2份,膨胀石墨0.2-0.5份和液态酚醛树脂5-6份。
本发明所述的低碳Al2O3-C耐火材料,其中,由如下重量份的组分制成:刚玉颗粒50份,刚玉细粉30份,活性ɑ-Al2O3微粉5份,硅粉4份,铝粉9份,纳米炭黑0.8份,石墨烯2份,膨胀石墨0.2份和液态酚醛树脂5份。
本发明所述的低碳Al2O3-C耐火材料,其中,所述活性ɑ-Al2O3微粉的粒径≤2μm。
本发明所述的低碳Al2O3-C耐火材料,其中,所述刚玉颗粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为3-10mm。
本发明所述的低碳Al2O3-C耐火材料,其中,刚玉细粉粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为20-60μm。
本发明所述的低碳Al2O3-C耐火材料的制备方法,包括以下步骤:
(1)按配比准备原料,将纳米炭黑与活性ɑ-Al2O3微粉在球磨机中球磨混合,以无水乙醇为分散介质,球磨转速为300-350r/min,球磨时间为4-4.5h;
(2)然后将步骤(1)中球磨后的混合料中加入到预混器中,再加入所述硅粉、铝粉、石墨烯和膨胀石墨进行混合,混合时间为3-6min,得到预混细粉;
(3)将所述刚玉颗粒和刚玉细粉放入混炼机混炼3-5min,缓慢加入所述液态酚醛树脂,混合5-6min;再加入步骤(2)中所述预混细粉,混炼20-35min得到混合料;
(4)将步骤(3)中所述混合料困料12-15h后,在165-180MPa压力下加工成坯体;
(5)将步骤(4)中所述坯体放置在200-250℃温度下干燥15-20h,然后在1000-1300℃的温度下保温10-15h,得到低碳Al2O3-C耐火材料。
本发明有益效果:
本发明所述的低碳Al2O3-C耐火材料,通过控制颗粒粒度级配和纳米炭黑、石墨烯和膨胀石墨的协同增强增韧作用,可以制备出强度高,抗热震性好的低碳铝碳耐火材料。
本发明所述的低碳Al2O3-C耐火材料的制备方法,通过对各原料组分的加入顺序及工艺参数的设定,制备出了性能优良的低碳Al2O3-C耐火材料。
下面将结合具体实施例对本发明作进一步说明。
具体实施方式
实施例1
一种低碳Al2O3-C耐火材料,由如下重量份的组分制成:刚玉颗粒50份,刚玉细粉30份,活性ɑ-Al2O3微粉5份,硅粉4份,铝粉9份,纳米炭黑0.8份,石墨烯2份,膨胀石墨0.2份和液态酚醛树脂5份;活性ɑ-Al2O3微粉的粒径≤2μm;刚玉颗粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为3-10mm;刚玉细粉粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为20-60μm。
本发明所述的低碳Al2O3-C耐火材料的制备方法,包括以下步骤:
(1)按配比准备原料,将纳米炭黑与活性ɑ-Al2O3微粉在球磨机中球磨混合,以无水乙醇为分散介质,球磨转速为300r/min,球磨时间为4.5h;
(2)然后将步骤(1)中球磨后的混合料中加入到预混器中,再加入所述硅粉、铝粉、石墨烯和膨胀石墨进行混合,混合时间为6min,得到预混细粉;
(3)将所述刚玉颗粒和刚玉细粉放入混炼机混炼3min,缓慢加入所述液态酚醛树脂,混合6min;再加入步骤(2)中所述预混细粉,混炼35min得到混合料;
(4)将步骤(3)中所述混合料困料12h后,在180MPa压力下加工成坯体;
(5)将步骤(4)中所述坯体放置在200-250℃温度下干燥20h,然后在1000-1300℃的温度下保温10h,得到低碳Al2O3-C耐火材料。
本实施例制备的的低碳Al2O3-C耐火材料经检测:常温耐压强度为92MPa,体积密度为2.98g/cm3,16000C×3h埋碳气氛下进行渣侵蚀试验,无明显侵蚀或渗透现象。
实施例2
一种低碳Al2O3-C耐火材料,由如下重量份的组分制成:刚玉颗粒60份,刚玉细粉20份,活性ɑ-Al2O3微粉6份,硅粉5份,铝粉10份,纳米炭黑0.6份,石墨烯1份,膨胀石墨0.5份和液态酚醛树脂6份;活性ɑ-Al2O3微粉的粒径≤2μm;刚玉颗粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为3-10mm;刚玉细粉粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为20-60μm。
本发明所述的低碳Al2O3-C耐火材料的制备方法,包括以下步骤:
(1)按配比准备原料,将纳米炭黑与活性ɑ-Al2O3微粉在球磨机中球磨混合,以无水乙醇为分散介质,球磨转速为300r/min,球磨时间为4h;
(2)然后将步骤(1)中球磨后的混合料中加入到预混器中,再加入所述硅粉、铝粉、石墨烯和膨胀石墨进行混合,混合时间为3min,得到预混细粉;
(3)将所述刚玉颗粒和刚玉细粉放入混炼机混炼5min,缓慢加入所述液态酚醛树脂,混合5min;再加入步骤(2)中所述预混细粉,混炼20min得到混合料;
(4)将步骤(3)中所述混合料困料15h后,在165MPa压力下加工成坯体;
(5)将步骤(4)中所述坯体放置在200-250℃温度下干燥15h,然后在1000-1300℃的温度下保温15h,得到低碳Al2O3-C耐火材料。
本实施例制备的的低碳Al2O3-C耐火材料经检测:常温耐压强度为80MPa,体积密度为3.04g/cm3,16000C×3h埋碳气氛下进行渣侵蚀试验,无明显侵蚀或渗透现象。
以上所述的实施例仅仅是对本发明的优选实施方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案作出的各种变形和改进,均应落入本发明权利要求书确定的保护范围内。
Claims (6)
1.一种低碳Al2O3-C耐火材料,其特征在于:由如下重量份的组分制成:刚玉颗粒50-60份,刚玉细粉20-30份,活性ɑ-Al2O3微粉5-6份,硅粉4-5份,铝粉9-10份,纳米炭黑0.6-0.8份,石墨烯1-2份,膨胀石墨0.2-0.5份和液态酚醛树脂5-6份。
2.根据权利要求1所述的低碳Al2O3-C耐火材料,其特征在于:由如下重量份的组分制成:刚玉颗粒50份,刚玉细粉30份,活性ɑ-Al2O3微粉5份,硅粉4份,铝粉9份,纳米炭黑0.8份,石墨烯2份,膨胀石墨0.2份和液态酚醛树脂5份。
3.根据权利要求1所述的低碳Al2O3-C耐火材料,其特征在于:所述活性ɑ-Al2O3微粉的粒径≤2μm。
4.根据权利要求1所述的低碳Al2O3-C耐火材料,其特征在于:所述刚玉颗粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为3-10mm。
5.根据权利要求1-4任意一项所述的低碳Al2O3-C耐火材料,其特征在于:刚玉细粉粒的Al2O3的含量≥98wt,刚玉颗粒的粒径为20-60μm。
6.权利要求1-5任意一项所述的低碳Al2O3-C耐火材料的制备方法,其特征在于:包括以下步骤:
(1)按配比准备原料,将纳米炭黑与活性ɑ-Al2O3微粉在球磨机中球磨混合,以无水乙醇为分散介质,球磨转速为300-350r/min,球磨时间为4-4.5h;
(2)然后将步骤(1)中球磨后的混合料中加入到预混器中,再加入所述硅粉、铝粉、石墨烯和膨胀石墨进行混合,混合时间为3-6min,得到预混细粉;
(3)将所述刚玉颗粒和刚玉细粉放入混炼机混炼3-5min,缓慢加入所述液态酚醛树脂,混合5-6min;再加入步骤(2)中所述预混细粉,混炼20-35min得到混合料;
(4)将步骤(3)中所述混合料困料12-15h后,在165-180MPa压力下加工成坯体;
(5)将步骤(4)中所述坯体放置在200-250℃温度下干燥15-20h,然后在1000-1300℃的温度下保温10-15h,得到低碳Al2O3-C耐火材料。
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CN107602099A (zh) * | 2017-09-22 | 2018-01-19 | 马鞍山利尔开元新材料有限公司 | 一种含改性石墨转炉挡渣用低碳滑板砖及其制备方法 |
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CN115196983A (zh) * | 2022-08-08 | 2022-10-18 | 安徽工业大学 | 一种原位催化合成SiCw增强低碳铝碳耐火材料及其制备方法 |
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