CN108409344A - 一种循环流化床锅炉炉顶耐磨浇注料及其制备方法 - Google Patents

一种循环流化床锅炉炉顶耐磨浇注料及其制备方法 Download PDF

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CN108409344A
CN108409344A CN201810509064.2A CN201810509064A CN108409344A CN 108409344 A CN108409344 A CN 108409344A CN 201810509064 A CN201810509064 A CN 201810509064A CN 108409344 A CN108409344 A CN 108409344A
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张寒
陈金凤
赵惠忠
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JINGZHOU HUAXIN MOLAISHI CO.,LTD.
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Abstract

本发明涉及一种循环流化床锅炉炉顶耐磨浇注料及其制备方法。其技术方案是：以20～25wt％的钛铁渣颗粒和40～45wt％的烧结莫来石颗粒为骨料，以20～25wt％的烧结莫来石细粉、7～12wt％的γ‑氧化铝微粉、1～4wt％的锆英石细粉和1～4wt％的二硼化锆微粉为基质料；先将所述基质料混匀，再将混匀后的基质料加入所述骨料中，混匀，即得混合料；然后向所述混合料中依次加入占混合料8～10wt％的铝溶胶和0.05～0.1wt％的聚丙烯酸钠，搅拌，振动成型，室温养护12～24小时，在90～110℃条件下保温12～24h，制得循环流化床锅炉炉顶耐磨浇注料。本发明具有成本低廉和工艺简单的特点；所制备的循环流化床锅炉炉顶耐磨浇注料的强度高、耐磨性好和抗渣侵蚀性强。

Description

一种循环流化床锅炉炉顶耐磨浇注料及其制备方法
技术领域
本发明属于循环流化床锅炉耐磨浇注料技术领域。具体涉及一种循环流化床锅炉炉顶耐磨浇注料及其制备方法。
背景技术
循环流化床锅炉是一种高效低耗的热能利用技术，但在运行过程中，受燃料、助燃剂和脱硫剂等添加剂的影响，尤其是循环流化床锅炉炉顶长期遭受烟气和尘粒的冲刷与磨损，烟尘中的细小颗粒在高温下易与炉顶耐火材料发生反应形成低熔相，进而对炉顶造成侵蚀与渗透，这对循环流化床锅炉炉顶耐火材料提出了严格的要求。
“一种陶瓷结合高强耐磨浇注料的制备方法CN201110302742.6”专利技术，以电熔莫来石、红柱石和板状刚玉颗粒等为主要原料，以纯铝酸盐水泥和二氧化硅微粉为结合剂，再外加长石族矿物细粉和耐热不锈钢纤维等组分，经搅拌、浇注后养护，制得陶瓷结合高强耐磨浇注料。该技术所制备的复合材料具有高强度和良好的耐磨性，对使用环境的温度适应性较强，但其主要缺点在于原料组分复杂，制备工艺要求高，且纯铝酸盐水泥结合在高温下易产生低熔相，降低材料的抗侵蚀性能；此外，电熔莫来石、板状刚玉等耐火原料成本较高，增大了耐磨浇注料的开发成本。
发明内容
本发明旨在克服现有技术缺陷，目的在于提供一种成本低廉和工艺简单的循环流化床锅炉炉顶耐磨浇注料的制备方法，用该方法制备的循环流化床锅炉炉顶耐磨浇注料的强度高、耐磨性好和抗渣侵蚀性强。
为实现上述目的，本发明所采用的技术方案是：以20～25wt％的钛铁渣颗粒和40～45wt％的烧结莫来石颗粒为骨料，以20～25wt％的烧结莫来石细粉、7～12wt％的γ-氧化铝微粉、1～4wt％的锆英石细粉和1～4wt％的二硼化锆微粉为基质料；先将所述基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀，即得混合料；然后向所述混合料中依次加入占所述混合料8～10wt％的铝溶胶和0.05～0.1wt％的聚丙烯酸钠，搅拌均匀，振动成型，室温条件下养护12～24小时，在90～110℃条件下保温12～24h，制得循环流化床锅炉炉顶耐磨浇注料。
所述钛铁渣颗粒为冶炼钛铁合金所产生的炉渣，钛铁渣颗粒的主要化学成分是：Al2O3含量为75～80wt％，TiO2含量为8～10wt％，CaO含量为5～8wt％，Fe2O3含量≤1wt％；所述钛铁渣颗粒的粒度为0.1～6mm。
所述烧结莫来石颗粒的主要化学成分是：Al2O3含量为70～75wt％，SiO2含量为20～25wt％；所述烧结莫来石颗粒的粒度为0.1～6mm；
所述烧结莫来石细粉的主要化学成分是：Al2O3含量为70～75wt％，SiO2含量为20～25wt％；所述烧结莫来石细粉的粒度为60～80μm。
所述γ-氧化铝微粉的Al2O3含量≥98wt％；所述γ-氧化铝微粉的粒度为60～80μm。
所述锆英石细粉的ZrSiO4含量≥98wt％；所述锆英石细粉的粒度为60～80μm。
所述二硼化锆微粉的ZrB2含量≥98wt％；所述二硼化锆微粉的粒度为8～10μm。
所述铝溶胶的Al2O3含量为15～20wt％。
所述聚丙烯酸钠为化学纯。
由于采取上述技术方案，本发明与现有技术相比具有如下积极效果：
1、本发明采用合金冶炼废弃物为原料，充分利用有价组分资源的同时，显著降低了耐磨浇注料的制备成本，且制备过程中无需特殊的处理技术，工艺简单。
2、本发明利用原料组分的固溶化合与溶胶结合，减少低熔点物相的形成，增强骨料-基质料间的直接结合，不仅提高循环流化床锅炉炉顶耐磨浇注料的强度和耐磨性，且增强了循环流化床锅炉炉顶耐磨浇注料的抗渣侵蚀性。
本发明所制备的循环流化床锅炉炉顶耐磨浇注料经测定：常温耐压强度为40～45MPa；常温耐磨性试验磨损量为2.5～3.0cm3；1500℃×3h静态坩埚法抗渣实验侵蚀指数为2～5％。
因此，本发明具有成本低廉和工艺简单的特点；所制备的循环流化床锅炉炉顶耐磨浇注料的强度高、耐磨性好和抗渣侵蚀性强。
具体实施方式
下面结合具体实施方式对本发明作进一步的描述，并非对其保护范围的限制。
为避免重复，先将本具体实施方式所涉及的物料统一描述如下，实施例中不再赘述：
所述钛铁渣颗粒为冶炼钛铁合金所产生的炉渣，钛铁渣颗粒的主要化学成分是：Al2O3含量为75～80wt％，TiO2含量为8～10wt％，CaO含量为5～8wt％，Fe2O3含量≤1wt％；所述钛铁渣颗粒的粒度为0.1～6mm。
所述烧结莫来石颗粒的主要化学成分是：Al2O3含量为70～75wt％，SiO2含量为20～25wt％；所述烧结莫来石颗粒的粒度为0.1～6mm；
所述烧结莫来石细粉的主要化学成分是：Al2O3含量为70～75wt％，SiO2含量为20～25wt％；所述烧结莫来石细粉的粒度为60～80μm。
所述γ-氧化铝微粉的Al2O3含量≥98wt％；所述γ-氧化铝微粉的粒度为60～80μm。
所述锆英石细粉的ZrSiO4含量≥98wt％；所述锆英石细粉的粒度为60～80μm。
所述二硼化锆微粉的ZrB2含量≥98wt％；所述二硼化锆微粉的粒度为8～10μm。
所述铝溶胶的Al2O3含量为15～20wt％。
所述聚丙烯酸钠为化学纯。
实施例1
一种循环流化床锅炉炉顶耐磨浇注料及其制备方法。本实施例所述制备方法是：
以23～25wt％的钛铁渣颗粒和43～45wt％的烧结莫来石颗粒为骨料，以20～22wt％的烧结莫来石细粉、7～9wt％的γ-氧化铝微粉、1～3wt％的锆英石细粉和1～3wt％的二硼化锆微粉为基质料；先将所述基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀，即得混合料；然后向所述混合料中依次加入占所述混合料8～9.5wt％的铝溶胶和0.05～0.07wt％的聚丙烯酸钠，搅拌均匀，振动成型，室温条件下养护12～24小时，在90～110℃条件下保温12～24h，制得循环流化床锅炉炉顶耐磨浇注料。
本发明所制备的循环流化床锅炉炉顶耐磨浇注料经测定：常温耐压强度为40～42MPa；常温耐磨性试验磨损量为2.5～2.7cm3；1500℃×3h静态坩埚法抗渣实验侵蚀指数为2～4％。
实施例2
一种循环流化床锅炉炉顶耐磨浇注料及其制备方法。本实施例所述制备方法是：
以22～24wt％的钛铁渣颗粒和42～44wt％的烧结莫来石颗粒为骨料，以21～23wt％的烧结莫来石细粉、8～10wt％的γ-氧化铝微粉、1～3wt％的锆英石细粉和1～3wt％的二硼化锆微粉为基质料；先将所述基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀，即得混合料；然后向所述混合料中依次加入占所述混合料8～9.5wt％的铝溶胶和0.06～0.08wt％的聚丙烯酸钠，搅拌均匀，振动成型，室温条件下养护12～24小时，在90～110℃条件下保温12～24h，制得循环流化床锅炉炉顶耐磨浇注料。
本发明所制备的循环流化床锅炉炉顶耐磨浇注料经测定：常温耐压强度为41～43MPa；常温耐磨性试验磨损量为2.6～2.8cm3；1500℃×3h静态坩埚法抗渣实验侵蚀指数为2～4％。
实施例3
一种循环流化床锅炉炉顶耐磨浇注料及其制备方法。本实施例所述制备方法是：
以21～23wt％的钛铁渣颗粒和41～43wt％的烧结莫来石颗粒为骨料，以22～24wt％的烧结莫来石细粉、9～11wt％的γ-氧化铝微粉、2～4wt％的锆英石细粉和2～4wt％的二硼化锆微粉为基质料；先将所述基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀，即得混合料；然后向所述混合料中依次加入占所述混合料8.5～10wt％的铝溶胶和0.07～0.09wt％的聚丙烯酸钠，搅拌均匀，振动成型，室温条件下养护12～24小时，在90～110℃条件下保温12～24h，制得循环流化床锅炉炉顶耐磨浇注料。
本发明所制备的循环流化床锅炉炉顶耐磨浇注料经测定：常温耐压强度为42～44MPa；常温耐磨性试验磨损量为2.7～2.9cm3；1500℃×3h静态坩埚法抗渣实验侵蚀指数为3～5％。
实施例4
一种循环流化床锅炉炉顶耐磨浇注料及其制备方法。本实施例所述制备方法是：
以20～22wt％的钛铁渣颗粒和40～42wt％的烧结莫来石颗粒为骨料，以23～25wt％的烧结莫来石细粉、10～12wt％的γ-氧化铝微粉、2～4wt％的锆英石细粉和2～4wt％的二硼化锆微粉为基质料；先将所述基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀，即得混合料；然后向所述混合料中依次加入占所述混合料8.5～10wt％的铝溶胶和0.08～0.10wt％的聚丙烯酸钠，搅拌均匀，振动成型，室温条件下养护12～24小时，在90～110℃条件下保温12～24h，制得循环流化床锅炉炉顶耐磨浇注料。
本发明所制备的循环流化床锅炉炉顶耐磨浇注料经测定：常温耐压强度为43～45MPa；常温耐磨性试验磨损量为2.8～3.0cm3；1500℃×3h静态坩埚法抗渣实验侵蚀指数为3～5％。
本具体实施方式与现有技术相比具有如下积极效果：
1、本具体实施方式采用合金冶炼废弃物为原料，充分利用有价组分资源的同时，显著降低了耐磨浇注料的制备成本，且制备过程中无需特殊的处理技术，工艺简单。
2、本具体实施方式利用原料组分的固溶化合与溶胶结合，减少低熔点物相的形成，增强骨料-基质料间的直接结合，不仅提高循环流化床锅炉炉顶耐磨浇注料的强度和耐磨性，且增强了循环流化床锅炉炉顶耐磨浇注料的抗渣侵蚀性。
本具体实施方式所制备的循环流化床锅炉炉顶耐磨浇注料经测定：常温耐压强度为40～45MPa；常温耐磨性试验磨损量为2.5～3.0cm3；1500℃×3h静态坩埚法抗渣实验侵蚀指数为2～5％。
因此，本具体实施方式具有成本低廉和工艺简单的特点；所制备的循环流化床锅炉炉顶耐磨浇注料的强度高、耐磨性好和抗渣侵蚀性强。

Claims (10)

1.一种循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于以20～25wt％的钛铁渣颗粒和40～45wt％的烧结莫来石颗粒为骨料，以20～25wt％的烧结莫来石细粉、7～12wt％的γ-氧化铝微粉、1～4wt％的锆英石细粉和1～4wt％的二硼化锆微粉为基质料；先将所述基质料混匀，再将混匀后的基质料加入所述骨料中，混合均匀，即得混合料；然后向所述混合料中依次加入占所述混合料8～10wt％的铝溶胶和0.05～0.1wt％的聚丙烯酸钠，搅拌均匀，振动成型，室温条件下养护12～24小时，在90～110℃条件下保温12～24h，制得循环流化床锅炉炉顶耐磨浇注料。
2.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述钛铁渣颗粒为冶炼钛铁合金所产生的炉渣，钛铁渣颗粒的主要化学成分是：Al2O3含量为75～80wt％，TiO2含量为8～10wt％，CaO含量为5～8wt％，Fe2O3含量≤1wt％；所述钛铁渣颗粒的粒度为0.1～6mm。
3.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述烧结莫来石颗粒的主要化学成分是：Al2O3含量为70～75wt％，SiO2含量为20～25wt％；所述烧结莫来石颗粒的粒度为0.1～6mm。
4.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述烧结莫来石细粉的主要化学成分是：Al2O3含量为70～75wt％，SiO2含量为20～25wt％；所述烧结莫来石细粉的粒度为60～80μm。
5.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述γ-氧化铝微粉的Al2O3含量≥98wt％；所述γ-氧化铝微粉的粒度为60～80μm。
6.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述锆英石细粉的ZrSiO4含量≥98wt％；所述锆英石细粉的粒度为60～80μm。
7.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述二硼化锆微粉的ZrB2含量≥98wt％；所述二硼化锆微粉的粒度为8～10μm。
8.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述铝溶胶的Al2O3含量为15～20wt％。
9.根据权利要求1所述的循环流化床锅炉炉顶耐磨浇注料的制备方法，其特征在于所述聚丙烯酸钠为化学纯。
10.一种循环流化床锅炉炉顶耐磨浇注料，其特征在于所述循环流化床锅炉炉顶耐磨浇注料是根据权利要求1～9项中任一项所述的循环流化床锅炉炉顶耐磨浇注料的制备方法所制备的循环流化床锅炉炉顶耐磨浇注料。
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