CN111960831A - 一种水泥窑预热器用喷涂料 - Google Patents
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Abstract
本发明涉及一种水泥窑预热器用喷涂料,包含以下各组分及重量份:微孔莫来石20~33份,氧化铝空心球30~38份,铝酸钙水泥10~20份,氧化铝粉8~12份,锆英石粉4~8份,软质黏土3~6份,硅微粉2~5份,氯化锂1~2份。本发明制备的水泥窑预热器用喷涂料具有较强的抗侵蚀能力和良好的热震稳定性,并且具有较低的体积密度和导热系数,保温隔热性能好,很好的满足了水泥窑预热器的使用条件要求,在预热器的预期使用寿命超过两年,有效的保证了水泥窑生产运行的稳定性。
Description
技术领域
本发明属于不定形耐火材料技术领域,具体涉及一种水泥窑预热器用喷涂料。
背景技术
随着水泥生产规模和装备规格大幅增加,水泥窑预热器的规格和级数均在增加,并且在水泥窑协同处置工业和城市废物取得长足进展背景下,不同行业的工业废物和低品位原燃料,大量地用作水泥原燃料,一些有害元素和重金属元素也随之带入***内,这都对水泥窑预热器的抗结皮性能提出了更为严格的要求。此外,目前我国经济建设步伐有所放缓,水泥行业出现了严重的产能过剩,提高热能的利用效率,降低水泥生产成本对提高企业竞争力和实现技能减排具有十分积极的意义。由于水泥窑预热器的使用环境复杂,水泥窑喷涂料所处的服役环境比较恶劣,目前主要的问题在于预热器喷涂料使用过程中易与原料和燃料中的成分发生化学反应出现结皮,严重影响了预热器耐火材料的使用寿命。因此要求水泥窑预热器用喷涂料必须具有良好的耐侵蚀性、抗热震性和抗结皮性,预热器喷涂料经历了高铝质、刚玉质、莫来石质的发展过程。尽管目前已有碳化硅等材质的陶瓷内筒应用于水泥窑预热器,然而由于其价格昂贵,其应用范围受到了极大的限制。不少单位也都开发了适用于水泥窑预热器的喷涂料,但多数都是采用密度较大的重质材料制备,所制备的喷涂料导热系数比较高,需要较大的施工厚度才能起到防止热量散失的效果,容易造成材料消耗和设备重量增加。
发明内容
本发明所要解决的技术问题在于提供一种水泥窑预热器用喷涂料,所形成的喷涂层具有较强的抗侵蚀能力、抗结皮性能以及良好的热震稳定性,并且具有较低的体积密度和导热系数,保温隔热性能好,很好的满足了水泥窑预热器的使用条件要求。
为解决上述技术问题,本发明提供的一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
优选地,所述微孔莫来石包括粒度为3~5mm、1~3mm二种规格,各种规格的重量份如下:
3~5mm微孔莫来石 10~18份
1~3mm微孔莫来石 10~15份。
优选地,所述微孔莫来石中Al2O3的质量百分含量不小于60%。
优选地,所述氧化铝空心球包括粒度为1~3mm、0.2~1mm二种规格,各种规格的重量份如下:
1~3mm氧化铝空心球 12~16份
0.2~1mm氧化铝空心球 18~22份。
优选地,所述氧化铝空心球中Al2O3的质量百分含量不小于99%。
优选地,所述铝酸钙水泥中Al2O3的质量百分含量不小于50%。
优选地,所述锆英石粉中ZrO2的质量百分含量不小于32%。
优选地,所述硅微粉中SiO2的质量百分含量不小于94%。
本发明的有益效果在于:本发明选用微孔莫来石和氧化铝空心球等轻质球形骨料作为主体材料,施工时便于在管道中输送,同时能够有效降低预热器喷涂料的导热系数,采用铝酸钙水泥为结合剂,并引入锆英石和氯化锂,同时加入氧化铝微粉、硅微粉改善基质组成,所制备的喷涂料在施工过程中便于在管道中输送,粘附性好,硬化时间短,所形成的喷涂层具有较强的抗侵蚀能力、抗结皮性能以及良好的热震稳定性,并且具有较低的体积密度和导热系数,保温隔热性能好,很好的满足了水泥窑预热器的使用条件要求,在预热器的预期使用寿命超过两年,有效的保证了水泥窑生产运行的稳定性。
具体实施方式
实施例1
一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
其中,所述微孔莫来石中Al2O3的质量百分含量不小于60%;所述氧化铝空心球中Al2O3的质量百分含量不小于99%;所述铝酸钙水泥中Al2O3的质量百分含量不小于50%;所述锆英石粉中ZrO2的质量百分含量不小于32%;所述硅微粉中SiO2的质量百分含量不小于94%。
实施例2
一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
其中,所述微孔莫来石中Al2O3的质量百分含量不小于60%;所述氧化铝空心球中Al2O3的质量百分含量不小于99%;所述铝酸钙水泥中Al2O3的质量百分含量不小于50%;所述锆英石粉中ZrO2的质量百分含量不小于32%;所述硅微粉中SiO2的质量百分含量不小于94%。
实施例3
一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
其中,所述微孔莫来石中Al2O3的质量百分含量不小于60%;所述氧化铝空心球中Al2O3的质量百分含量不小于99%;所述铝酸钙水泥中Al2O3的质量百分含量不小于50%;所述锆英石粉中ZrO2的质量百分含量不小于32%;所述硅微粉中SiO2的质量百分含量不小于94%。
实施例4
一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
其中,所述微孔莫来石中Al2O3的质量百分含量不小于60%;所述氧化铝空心球中Al2O3的质量百分含量不小于99%;所述铝酸钙水泥中Al2O3的质量百分含量不小于50%;所述锆英石粉中ZrO2的质量百分含量不小于32%;所述硅微粉中SiO2的质量百分含量不小于94%。
实施例5
一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
其中,所述微孔莫来石中Al2O3的质量百分含量不小于60%;所述氧化铝空心球中Al2O3的质量百分含量不小于99%;所述铝酸钙水泥中Al2O3的质量百分含量不小于50%;所述锆英石粉中ZrO2的质量百分含量不小于32%;所述硅微粉中SiO2的质量百分含量不小于94%。
实施例6
一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
其中,所述微孔莫来石中Al2O3的质量百分含量不小于60%;所述氧化铝空心球中Al2O3的质量百分含量不小于99%;所述铝酸钙水泥中Al2O3的质量百分含量不小于50%;所述锆英石粉中ZrO2的质量百分含量不小于32%;所述硅微粉中SiO2的质量百分含量不小于94%。
实施例7
一种水泥窑预热器用喷涂料,包含以下各组分及重量份:
其中,所述微孔莫来石中Al2O3的质量百分含量不小于60%;所述氧化铝空心球中Al2O3的质量百分含量不小于99%;所述铝酸钙水泥中Al2O3的质量百分含量不小于50%;所述锆英石粉中ZrO2的质量百分含量不小于32%;所述硅微粉中SiO2的质量百分含量不小于94%。
上述实施例1-7所制备的水泥窑预热器用喷涂料的性能如下表:
由上述性能指标可知,本发明中选用微孔莫来石和氧化铝空心球等轻质球形骨料作为主体材料,施工时便于在管道中输送,同时能够有效降低预热器喷涂料的导热系数,采用铝酸钙水泥为结合剂,并引入锆英石和氯化锂,同时加入氧化铝微粉、硅微粉改善基质组成,所制备的喷涂料在施工过程中便于在管道中输送,粘附性好,硬化时间短,所形成的喷涂层具有较强的抗侵蚀能力、抗结皮性能以及良好的热震稳定性,并且具有较低的体积密度和导热系数,保温隔热性和抗侵蚀能力能好,很好的满足了水泥窑预热器的使用条件要求,在预热器的预期使用寿命超过两年,有效的保证了水泥窑生产运行的稳定性。
上述说明是示例性的而非限制性的。通过上述说明本领域技术人员可以意识到本发明的许多种改变和变形,其也将落在本发明的实质和范围之内。
Claims (8)
2.根据权利要求1所述的水泥窑预热器用喷涂料,其特征在于,所述微孔莫来石包括粒度为3~5mm、1~3mm二种规格,各种规格的重量份如下:
3~5mm微孔莫来石 10~18份
1~3mm微孔莫来石 10~15份。
3.根据权利要求1或2所述的水泥窑预热器用喷涂料,其特征在于,所述微孔莫来石中Al2O3的质量百分含量不小于60%。
4.根据权利要求1所述的水泥窑预热器用喷涂料,其特征在于,所述氧化铝空心球包括粒度为1~3mm、0.2~1mm二种规格,各种规格的重量份如下:
1~3mm氧化铝空心球 12~16份
0.2~1mm氧化铝空心球 18~22份。
5.根据权利要求1或4所述的水泥窑预热器用喷涂料,其特征在于,所述氧化铝空心球中Al2O3的质量百分含量不小于99%。
6.根据权利要求1所述的水泥窑预热器用喷涂料,其特征在于,所述铝酸钙水泥中Al2O3的质量百分含量不小于50%。
7.根据权利要求1所述的水泥窑预热器用喷涂料,其特征在于,所述锆英石粉中ZrO2的质量百分含量不小于32%。
8.根据权利要求1所述的水泥窑预热器用喷涂料,其特征在于,所述硅微粉中SiO2的质量百分含量不小于94%。
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