CN109608209A - 一种高导热高耐磨耐火材料的生产方法 - Google Patents

一种高导热高耐磨耐火材料的生产方法 Download PDF

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CN109608209A
CN109608209A CN201811566249.3A CN201811566249A CN109608209A CN 109608209 A CN109608209 A CN 109608209A CN 201811566249 A CN201811566249 A CN 201811566249A CN 109608209 A CN109608209 A CN 109608209A
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thermal conductivity
refractory material
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李建涛
董红芹
陈泉锋
范晓凯
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Zhengzhou Anliankai Industrial Co Ltd
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Abstract

本发明提供一种高导热高耐磨耐火材料的生产方法，具体包括如图1所示步骤：1)在碳化硅质材料中的基质中添加一种或几种高导热材料；2)加入无水树脂做结合剂，混合后按需求形状制坯；3)在氮化气氛下高温，保温烧制成制品；4)在密封的气氛炉内保持高温,高负压环境，通过硅蒸汽对所述制品渗硅。通过该方法生产的制品导热系数高、耐磨性能好，高温性能优良，利用本制品制作的煅烧炉设备的使用寿命明显延长。

Description

一种高导热高耐磨耐火材料的生产方法
技术领域
本发明涉及耐火材料生产领域，尤其涉及一种高导热高耐磨耐火材料的生产方法。
背景技术
目前还原炉、焦炉、石油焦煅烧炉等隔焰加热的工业窑炉的主体耐材多选用高铝砖、硅砖等，这些产品都是采用天然或合成的氧化物或者氧化物化合物原料烧结而成，这些氧化物的固有特性导致其导热率较低，而且这些产品的烧结都是液相烧结，耐磨性不高，硅砖和高铝砖的导热率都在3w/m·k以下，耐磨系数在8以下，现有耐火材料存在着导热系数较低、耐磨性差等问题，导致生产效率低，影响设备使用寿命等问题。
发明内容
本发明提供一种高导热高耐磨耐火材料的生产方法，通过该方法生产的制品导热系数高、耐磨性能好，高温性能优良，利用本制品制作的煅烧炉设备的使用寿命明显延长，具体包括如图1所示步骤：
1)在碳化硅质材料中的基质中添加一种或几种高导热材料；
2)加入无水树脂做结合剂，混合后按需求形状制坯；
3)在氮化气氛下高温，保温烧制成制品；
4)在密封的气氛炉内保持高温,高负压环境，通过硅蒸汽对所述制品渗硅。
对于隔焰传热的还原竖炉等工业炉炉，导热率越高，传热效率越高，生产效率越高，目前市场上性能优良导热率较高的制品只有碳化硅制品，基本为氧化物结合和氮化物结合碳化硅制品，氧化物结合碳化硅制品，由于结合相为氧化物，导热率相对较低，1000度导热率约12w/m·k，氮化物结合的碳化硅制品导热率和耐磨性能有所提高，其导热率约为16w/m·k，故本发明采用添加高导热添加剂的方式增加产品的高导热性；采取在在氮化气氛下高温，保温烧制成制品，使得制品成为氮化物结合的碳化硅制品，即提高了制品的导热性，也提高了制品的耐磨度。在此情况下进一步高温高负压渗硅，减少制品的显孔率，提高制品的致密度，进一步提高导热性和耐磨度。采用特殊的氮化气氛下高温制柸，高温高负压下渗透的二步烧成工艺，所生产的高导热复合耐火材料，其导热率可达35w/m·k以上，且具有陶瓷材料的致密性能，因此制品具有优良的耐磨性能
上述w/m·K单位为导热系数，指在稳定传热条件下，1m厚的材料，两侧表面的温差为1度(K，℃)，在1秒内(1s)，通过1平方米面积传递的热量，单位为瓦/米·度(w/m·K)。
优选地，所述高导热材料包括：氮化铝、氮化硼、硅化钼、钼、硅。
优选地，所述高导热材料加入量与基质的质量比范围为5～12％。
优选地，步骤3)中，所述高温的温度范围为1450℃～1500℃。
优选地，步骤4)中，所述高温的温度范围为1700℃～1800℃。
优选地，步骤4)中，所述高负压的压力范围为-8万帕～-12万帕。
优选地，所述硅蒸汽为纯硅Si蒸汽。
通过上诉方式生产的耐火材料具有高导热和高耐磨的性能，最终制品气孔率≤2％，1000℃下导热系数能够达到40～45w/m·k左右，荷重软化温度能够达到1700℃以上，耐磨指数达到1以下。
附图说明
图1为本发明方法步骤的流程图。
具体实施方式
为更容易理解本发明的优点、特征以及达到技术效果的技术方法将参照例示性实施例及所附图式进行更详细地描述，且本发明可以不同形式来实现，故不应被理解为本发明仅限于此处所陈述的实施例，相反地，对本领域的技术人员，所提供的实施例将更加透彻与全面且完整地传达本发明的范畴，且本发明将以申请专利文件的权利要求确定保护范围。
该耐火材料的四级配料工艺，主要原料为碳化硅，基质中添加一种或几种高导热材料，如氮化铝、氮化硼、硅化钼、钼、硅。
采用无水树脂做结合剂，混合后成型制坯，在氮化气氛下1450度保温进行一步烧成形，使制品具有一定的结合强度同时有一定的显气孔率。
然后在气氛炉内在高温高负压下利用硅蒸汽对制品渗硅封闭开口气孔。
即通过耐火材料生产工艺，达到陶瓷材料的结合效果，最终形成高导热材料在基质中形成连续相，并形成连续的热流通道从而具有高导热和高耐磨的性能，最终制品气孔率≤2％，140～45w/m·k左右，荷重软化温度能够达到1700℃以上，耐磨指数达到1以下。

Claims (7)

1.一种高导热高耐磨耐火材料的生产方法，其特征在于，包括如下步骤：
1)在碳化硅质材料中的基质中添加一种或几种高导热材料；
2)加入无水树脂做结合剂，混合后按需求形状制坯；
3)在氮化气氛下高温，保温烧制成制品；
4)在密封的气氛炉内保持高温,高负压环境，通过硅蒸汽对所述制品渗硅。
2.根据权利要求1所述的高导热高耐磨耐火材料的生产方法，其特征在于，所述高导热材料包括：氮化铝、氮化硼、硅化钼、钼、硅。
3.根据权利要求2所述的高导热高耐磨耐火材料的生产方法，其特征在于，所述高导热材料与基质的质量比范围为5～12％。
4.根据权利要求1所述的高导热高耐磨耐火材料的生产方法，其特征在于，所述步骤3)中，所述高温的温度范围为1450℃～1500℃。
5.根据权利要求1所述的高导热高耐磨耐火材料的生产方法，其特征在于，所述步骤4)中，所述高温的温度范围为1700℃～1800℃。
6.根据权利要求1所述的高导热高耐磨耐火材料的生产方法，其特征在于，所述步骤4)中，所述高负压的压力范围为-8万帕～-12万帕。
7.根据权利要求1-6所述的任意一种高导热高耐磨耐火材料的生产方法，其特征在于，所述步骤4)中，所述硅蒸汽为纯硅蒸汽。
CN201811566249.3A 2018-12-21 2018-12-21 一种高导热高耐磨耐火材料的生产方法 Pending CN109608209A (zh)

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Cited By (1)

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CN112759375A (zh) * 2019-11-05 2021-05-07 宜兴市中电耐磨耐火科技有限公司 一种高吸收率、高热导率碳化硅耐磨浇注料及其制备工艺

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Application publication date: 20190412