CN114516757A - 一种水泥窑用抗结皮纳米衬板组份及加工流程 - Google Patents
一种水泥窑用抗结皮纳米衬板组份及加工流程 Download PDFInfo
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Abstract
本发明属于耐火材料的技术领域，具体涉及一种水泥窑用抗结皮纳米衬板组份及加工流程，这种水泥窑用抗结皮纳米衬板组份及加工流程包括粒径为3‑5毫米的第一SiC颗粒：6‑25wt％；粒径为1‑3毫米的第一SiC颗粒：28‑40wt％；粒径为0.088毫米‑1毫米的第一SiC颗粒：14‑25wt％；粒度为200‑325目的第二SiC细粉：15‑28wt％；粒度为2‑5微米的氮化硅微粉3‑10wt％；粒度为50‑100纳米的第一SiC微粉3‑10wt％；粒度为50‑100纳米的不定形态高纯SiO2超微粉：1‑5wt％；聚乙烯醇，4‑5wt％。其中：第一SiC中，SiC含量≥97wt％，Fe2O3≤0.5wt％；第二SiC中，SiC含量≥98wt％，Fe2O3≤0.3wt％。这种水泥窑用抗结皮纳米衬板组份及加工流程具有增加强度，不与水泥窑中的水泥成分反应，抗结皮效果好的优点。
Description
技术领域
本发明属于衬板的技术领域，具体涉及一种水泥窑用抗结皮纳米衬板组份 及加工流程。
背景技术
水泥回转窑属于建材设备类，是石灰窑的一种。回转窑按处理物料不同可 分为水泥回转窑、冶金化工回转窑和石灰回转窑。水泥回转窑是水泥熟料干法 和湿法生产线的主要设备。
目前，水泥窑易结皮部位通常使用的是抗结皮浇注料，抗结皮浇注料为一 种不定形材料，主要成分为SiC，Al2O3，SiO2，SiC本身为非氧化物，不易与其 他氧化物反应形成结合强度，制备过程中要控制SiC的加入量，常见抗结皮浇 注料SiC含量在20％-60％，并且SiC原料施工流动性较差，施工之后的实际强度 远低于实验室检测强度。因为SiC的加入量受到限制，其抗结皮性能已无法很 好地满足现有水泥生产线，尤其是协同处置垃圾、危废、工业污泥的水泥生产 线；因为其施工后的实际强度较低，在水泥熟料的冲刷磨损下，其使用寿命较 短。
发明内容
本发明的目的是提供一种水泥窑用抗结皮纳米衬板组份及加工流程，以解 决现有水泥窑用抗结皮浇注料存在的抗结皮性、耐磨性、抗侵蚀性等方面的不 足技术问题。
为了解决上述技术问题，本发明提供了一种水泥窑用抗结皮纳米衬板组份， 组份为：
粒径为3-5毫米的第一SiC颗粒：6-25wt％；
粒径为1-3毫米的第一SiC颗粒：28-40wt％；
粒径为0.088毫米-1毫米的第一SiC颗粒：14-25wt％；
粒度为200-325目的第二SiC细粉：15-28wt％；
粒度为2-5微米的氮化硅微粉3-10wt％；
粒度为50-100纳米的第一SiC微粉3-10wt％；
粒度为50-100纳米的不定形态高纯SiO2超微粉：1-5wt％；
聚乙烯醇，4-5wt％。
进一步的，其中：
第一SiC中，SiC含量≥97wt％，Fe2O3≤0.5wt％；
第二SiC中，SiC含量≥98wt％，Fe2O3≤0.3wt％。
进一步的，其中：
氮化硅中氮化硅含量≥95wt％。
进一步的，其组份中还有：粒度为200-325目的Zr02细粉0-5wt％。
其中：ZrO2细粉中ZrO2≥99wt％。
进一步的，其中：SiO2微粉中SiO2≥99.5％。
本发明的有益效果是，本发明中加入大量SiC，通过SiC是非氧化物，难润 湿，难烧结的优点，实现提升衬板的抗烧结性。加入SiO2微粉能够增加衬板的 韧性。加入SiO2微粉后，纳米级SiC超微粉活性高，与纳米级不定形态SiO2超 微粉能在烧结过程中有很高的结合强度，形成液相后封闭气孔，降低衬板的开 口气孔率。
另一方面，本发明还提供了一种水泥窑用抗结皮纳米衬板的加工流程，步 骤为：
步骤一：对如上所述的水泥窑用抗结皮纳米衬板组份进行搅拌；
步骤二：对搅拌后的衬板组份进行压制，其压力不低于500pa；
步骤三：对衬板组份放入养护室养护和干燥；
步骤四：对衬板组份进行烧制，烧制温度为1480-1550摄氏度。
本发明的有益效果是，本发明中通过高压压制和养护干燥，提升衬板的强 度，并且通过特定的高温温度进行烧制，使衬板具有稳定的结构。
为使本发明的上述目的、特征和优点能更明显易懂，下文特举较佳实施例。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将对本发明的 技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施 例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
一种水泥窑用抗结皮纳米衬板组份，组份为：
粒径为3-5毫米的第一SiC颗粒：6-25wt％；
粒径为1-3毫米的第一SiC颗粒：28-40wt％；
粒径为0.088毫米-1毫米的第一SiC颗粒：14-25wt％；
粒度为200-325目的第二SiC细粉：15-28wt％；
粒度为2-5微米的氮化硅微粉3-10wt％；
粒度为50-100纳米的第一SiC微粉3-10wt％；
粒度为50-100纳米的不定形态高纯SiO2超微粉：1-5wt％；
聚乙烯醇，4-5wt％。
其中：第一SiC中，SiC含量≥97wt％，Fe2O3≤0.5wt％；第二SiC中，SiC 含量≥98wt％，Fe2O3≤0.3wt％。
其中：氮化硅中氮化硅含量≥95wt％。
其组份中还加入：粒度为200-325目的Zr02细粉0-5wt％。
其中：ZrO2细粉中ZrO2≥99wt％。
其中：SiO2微粉中SiO2≥99.5％。
综上所述，加入大量SiC，通过SiC是非氧化物，难润湿，难烧结的优点， 实现提升衬板的抗烧结性。加入SiO2微粉能够增加衬板的韧性。加入SiO2微粉 后，纳米级SiC超微粉活性高，与纳米级不定形态SiO2超微粉能在烧结过程中 有很高的结合强度，形成液相后封闭气孔，降低衬板的开口气孔率。
本发明还提供了一种水泥窑用抗结皮纳米衬板的加工流程，步骤为：
步骤一：对如上述的水泥窑用抗结皮纳米衬板组份进行搅拌；
步骤二：对搅拌后的衬板组份进行压制，其压力不低于500pa；
步骤三：对衬板组份放入养护室养护和干燥；
步骤四：对衬板组份进行烧制，烧制温度为1480-1550摄氏度。
实施例1：
将全部成分称重后进行混料，混料过程中外加干料重量的4.5％聚乙烯醇， 充分混匀后，压制成型、成型后干燥养护5天，经1500℃高温烧制而成。
实施例2：
将全部成分称重后进行混料，混料过程中外加干料重量的4.5％聚乙烯醇， 充分混匀后，压制成型、成型后干燥养护5天，经1500℃高温烧制而成。
实施例3：
将全部成分称重后进行混料，混料过程中外加干料重量的4.1％聚乙烯醇， 充分混匀后，压制成型、成型后干燥养护5天，经1500℃高温烧制而成。
按照上述实施例制得的耐磨浇注料的各项性能指标如下表所示：
其中：
体积密度表示在110摄氏度的温度下保持24小时后的密度；
常温耐压强度表示在常温下，衬板的抗压能力；
耐磨性能表示耐磨浇注料的抗耐磨性能。
显气孔率表示衬板的显现气孔的频率；
荷重软化温度表示在衬板抗压时，高温软化的温度；
热震稳定性是指耐火材料抵抗温度急剧变化而导致损伤的能力，本实验采 用1100℃的高温和水冷的低温测试衬板的热震稳定性。
进而使本发明的衬板具有进一步的优点：
1、使用周期能从12-18个月提高到36个月以上；
2、结皮厚度能从10cm-15cm降低到2cm；
3、清理结皮频次从6-8小时一次降低至24小时一次。
以上述依据本发明的理想实施例为启示，通过上述的说明内容，相关工作 人员完全可以在不偏离本项发明技术思想的范围内，进行多样的变更以及修改。 本项发明的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围 来确定其技术性范围。
Claims (6)
1.一种水泥窑用抗结皮纳米衬板组份，其特征在于，组份为：
粒径为3-5毫米的第一SiC颗粒：6-25wt％；
粒径为1-3毫米的第一SiC颗粒：28-40wt％；
粒径为0.088毫米-1毫米的第一SiC颗粒：14-25wt％；
粒度为200-325目的第二SiC细粉：15-28wt％；
粒度为2-5微米的氮化硅微粉3-10wt％；
粒度为50-100纳米的第一SiC微粉3-10wt％；
粒度为50-100纳米的不定形态高纯SiO2超微粉：1-5wt％；
聚乙烯醇，4-5wt％。
2.如权利要求1所述的一种水泥窑用抗结皮纳米衬板组份，其特征在于，其中：
第一SiC中，SiC含量≥97wt％，Fe2O3≤0.5wt％；
第二SiC中，SiC含量≥98wt％，Fe2O3≤0.3wt％。
3.如权利要求2所述的一种水泥窑用抗结皮纳米衬板组份，其特征在于，其中：
氮化硅中氮化硅含量≥95wt％。
4.如权利要求3所述的一种水泥窑用抗结皮纳米衬板组份，其特征在于，其组份中还有：粒度为200-325目的Zr02细粉0-5wt％。
其中：ZrO2细粉中ZrO2≥99wt％。
5.如权利要求4所述的一种水泥窑用抗结皮纳米衬板组份，其特征在于，其中：SiO2微粉中SiO2≥99.5％。
6.一种水泥窑用抗结皮纳米衬板的加工流程，其特征在于，步骤为：
步骤一：对如权利要求1-5任一项所述的水泥窑用抗结皮纳米衬板组份进行搅拌；
步骤二：对搅拌后的衬板组份进行压制，其压力不低于500pa；
步骤三：对衬板组份放入养护室养护和干燥；
步骤四：对衬板组份进行烧制，烧制温度为1480-1550摄氏度。
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