CN110028314B - 一种高热震稳定性堇青石-莫来石窑具及其制备方法 - Google Patents
一种高热震稳定性堇青石-莫来石窑具及其制备方法 Download PDFInfo
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Abstract
一种高热震稳定性堇青石‑莫来石窑具及其制备方法,种高热震稳定性堇青石‑莫来石窑具,包括以下重量份的原料:硼泥30‑45份、堇青石‑莫来石熟料10‑20份、废旧陶瓷20‑25份、红土15‑25份、泥岩10‑15份、硅质岩8‑12份、硅酸锆5‑10份、氧化铝5‑8份、羧甲基淀粉钠3‑5份、柠檬酸钠1‑3份,本发明制备的堇青石‑莫来石窑具以硼泥、废旧陶瓷、堇青石‑莫来石熟料、红土为骨料,引入泥岩、硅质岩、硅酸锆、氧化铝、羧甲基淀粉钠、柠檬酸钠为基质材料组成本发明的窑具的坯体,硼泥的主要成分为氧化镁和氧化硅,可做高温耐火材料,泥岩和硅质岩富含氧化硅,与硼泥伍配,可大大提高制得的窑具热震稳定性和抗折强度。
Description
技术领域
本发明属于窑具领域,具体涉及一种高热震稳定性堇青石-莫来石窑具及其制备方法。
背景技术
对窑炉中用于支承烧成制品的窑具,要求其抗热震性要好、能耗低的特点,堇青石-莫来石材料由于其膨胀系数低、耐高温性能强被用作高档的窑具材料,但由于堇青石、莫来石材料成本就很高、且合成材料的烧成率低,导致堇青石-莫来石窑具的生产成本高、废料多,发展受到限制;此外现有的堇青石-莫来石窑具材料的体密为1.75-2.15g/cm3,产品重量大、吸热就多,对生产原料和在窑炉中使用时所消耗的燃料大。
废旧陶瓷是在陶瓷生产生产过程产生的废料或者已失去使用价值的陶瓷,通常的处理方法是是降级处理和填埋,造成材料的浪费,同时也对环境造成一定的不良影响,有待近一步改进。
发明内容
本发明的目的是克服现有技术的缺点,提供一种高热震稳定性堇青石-莫来石窑具,另一目的是提供一种制备上述窑具的方法。
本发明采用如下技术方案:
一种高热震稳定性堇青石-莫来石窑具,包括以下重量份的原料:硼泥30-45份、堇青石-莫来石熟料10-20份、废旧陶瓷20-25份、红土15-25份、泥岩10-15份、硅质岩8-12份、硅酸锆5-10份、氧化铝5-8份、羧甲基淀粉钠3-5份、柠檬酸钠1-3份。
进一步的,所述废旧陶瓷按照计量百分数计包括以下化学组成:SiO2:65-75%、Al2O3:10-15%、MgO:5-10%、Fe2O3:5-8%、K2O:2-5%。
进一步的,所述废旧陶瓷的粒度为0-0.5um。
进一步的,所述氧化铝的纯度≥96%。
一种高热震稳定性堇青石-莫来石窑具的制备方法,包括如下步骤:
(1)混料:将坯体各原料按其重量称重后,放入混料机搅拌20-30min,再按料:水:球为1:0.8-1:1.5-2,湿球磨15-20h;
(2)困料:将步骤(1)获得的混合料放入料箱中在40-50℃的温度下,保存24-30h;
(3)压制成型:根据所要制作窑具的产品形状,制作窑具产品生坯;
(4)干燥:将制得的生坯放入空气湿度为30-40%,温度为70-80℃的条件下,干燥20-25h,然后转入空气湿度为20-28%,温度为90-100℃的条件下,干燥30-36h;
(5)烧制:将干燥后的坯体送入窑炉,窑炉在还原气氛下经4-5h升温至950℃,保温30-45min,然后将窑炉转成氧化气氛,经2-3h升温至1250℃,保温1-2h,再将窑炉转成还原气氛,经1-2h升温至1350-1380℃,保温2-3h,最后缓慢降温至室温,制得所述堇青石-莫来石窑具。
进一步的,所述步骤(3)中按混合料1.8-2.3%的烧失量来计算窑具产品生坯的尺寸。
进一步的,所述步骤(3)中的生坯成型方法包括半干法压制、高压真空挤出、高压注浆、人工捣打、滚压成型中任意一种或多种。
由上述对本发明的描述可知,与现有技术相比,本发明的有益效果是:本发明制备的堇青石-莫来石窑具以硼泥、废旧陶瓷、堇青石-莫来石熟料、红土为骨料,引入泥岩、硅质岩、硅酸锆、氧化铝、羧甲基淀粉钠、柠檬酸钠为基质材料组成本发明的窑具的坯体,硼泥的主要成分为氧化镁和氧化硅,可做高温耐火材料,泥岩和硅质岩富含氧化硅,与硼泥伍配,可大大提高制得的窑具热震稳定性和抗折强度,通过限制坯体的原料组成和制备方法,坯体需要依次经过还原-氧化-还原的煅烧,使最后制得的堇青石-莫来石窑具产品密度低、质量轻、抗折强度高、热震稳定性好。
具体实施方式
以下通过具体实施方式对本发明作进一步的描述。
一种高热震稳定性堇青石-莫来石窑具,包括以下重量份的原料:硼泥30-45份、堇青石-莫来石熟料10-20份、废旧陶瓷20-25份、红土15-25份、泥岩10-15份、硅质岩8-12份、硅酸锆5-10份、氧化铝5-8份、羧甲基淀粉钠3-5份、柠檬酸钠1-3份。
具体的,废旧陶瓷按照计量百分数计包括以下化学组成:SiO2:65-75%、Al2O3:10-15%、MgO:5-10%、Fe2O3:5-8%、K2O:2-5%,进一步的,废旧陶瓷的粒度为0-0.5um。
进一步的,所述氧化铝的纯度≥96%。
一种高热震稳定性堇青石-莫来石窑具的制备方法,包括如下步骤:
(1)混料:将坯体各原料按其重量称重后,放入混料机搅拌20-30min,再按料:水:球为1:0.8-1:1.5-2,湿球磨15-20h;
(2)困料:将步骤(1)获得的混合料放入料箱中在40-50℃的温度下,保存24-30h;
(3)压制成型:根据所要制作窑具的产品形状,制作窑具产品生坯;
(4)干燥:将制得的生坯放入空气湿度为30-40%,温度为70-80℃的条件下,干燥20-25h,然后转入空气湿度为20-28%,温度为90-100℃的条件下,干燥30-36h;
(5)烧制:将干燥后的坯体送入窑炉,窑炉在还原气氛下经4-5h升温至950℃,保温30-45min,然后将窑炉转成氧化气氛,经2-3h升温至1250℃,保温1-2h,再将窑炉转成还原气氛,经1-2h升温至1350-1380℃,保温2-3h,最后缓慢降温至室温,制得所述堇青石-莫来石窑具。
具体的,步骤(3)中按混合料1.8-2.3%的烧失量来计算窑具产品生坯的尺寸,进一步的,步骤(3)中的生坯成型方法包括半干法压制、高压真空挤出、高压注浆、人工捣打、滚压成型中任意一种或多种。
实施例1
一种高热震稳定性堇青石-莫来石窑具,包括以下重量份的原料:硼泥30份、堇青石-莫来石熟料20份、废旧陶瓷20份、红土25份、泥岩10份、硅质岩8份、硅酸锆10份、氧化铝5份、羧甲基淀粉钠5份、柠檬酸钠1份。
具体的,废旧陶瓷按照计量百分数计包括以下化学组成:SiO2:65%、Al2O3:15%、MgO:10%、Fe2O3:8%、K2O:2%,进一步的,废旧陶瓷的粒度为0-0.5um。
进一步的,所述氧化铝的纯度≥96%。
一种高热震稳定性堇青石-莫来石窑具的制备方法,包括如下步骤:
(1)混料:将坯体各原料按其重量称重后,放入混料机搅拌20min,再按料:水:球为1:0.8:1.5,湿球磨20h;
(2)困料:将步骤(1)获得的混合料放入料箱中在50℃的温度下,保存24h;
(3)压制成型:根据所要制作窑具的产品形状,制作窑具产品生坯;
(4)干燥:将制得的生坯放入空气湿度为30%,温度为70℃的条件下,干燥25h,然后转入空气湿度为20%,温度为90℃的条件下,干燥36h;
(5)烧制:将干燥后的坯体送入窑炉,窑炉在还原气氛下经4h升温至950℃,保温30min,然后将窑炉转成氧化气氛,经3h升温至1250℃,保温1h,再将窑炉转成还原气氛,经2h升温至1350℃,保温3h,最后缓慢降温至室温,制得所述堇青石-莫来石窑具。
具体的,步骤(3)中按混合料1.8%的烧失量来计算窑具产品生坯的尺寸,进一步的,步骤(3)中的生坯成型方法为半干法压制。
制得的堇青石-莫来石窑具经试验获得如下性能参数:
密度:1.28g/cm3;
膨胀系数(1000℃):1.4*10-6k-1;
常温抗折:22.3MPa;
高温抗折(1250℃*0.5h):20.2MPa;
现有技术中的堇青石-莫来石窑具经试验获得如下性能参数:
密度:1.52g/cm3;
膨胀系数(1000℃):1.8*10-6k-1;
常温抗折:15.4MPa;
高温抗折(1250℃*0.5h):14.6MPa;
通过上述试验数据可知,本发明制得环保型堇青石-莫来石窑具相比于现有技术中的堇青石-莫来石窑具,产品密度低、质量轻、抗折强度高、热震稳定性好。
实施例2
一种高热震稳定性堇青石-莫来石窑具,包括以下重量份的原料:硼泥45份、堇青石-莫来石熟料10份、废旧陶瓷25份、红土15份、泥岩15份、硅质岩12份、硅酸锆5份、氧化铝8份、羧甲基淀粉钠3份、柠檬酸钠3份。
具体的,废旧陶瓷按照计量百分数计包括以下化学组成:SiO2:75%、Al2O3:10%、MgO:5%、Fe2O3:5%、K2O:5%,进一步的,废旧陶瓷的粒度为0-0.5um。
进一步的,所述氧化铝的纯度≥96%。
一种高热震稳定性堇青石-莫来石窑具的制备方法,包括如下步骤:
(1)混料:将坯体各原料按其重量称重后,放入混料机搅拌30min,再按料:水:球为1:1:2,湿球磨15h;
(2)困料:将步骤(1)获得的混合料放入料箱中在40℃的温度下,保存30h;
(3)压制成型:根据所要制作窑具的产品形状,制作窑具产品生坯;
(4)干燥:将制得的生坯放入空气湿度为40%,温度为80℃的条件下,干燥20h,然后转入空气湿度为28%,温度为100℃的条件下,干燥30h;
(5)烧制:将干燥后的坯体送入窑炉,窑炉在还原气氛下经5h升温至950℃,保温45min,然后将窑炉转成氧化气氛,经2h升温至1250℃,保温2h,再将窑炉转成还原气氛,经1h升温至1380℃,保温2h,最后缓慢降温至室温,制得所述堇青石-莫来石窑具。
具体的,步骤(3)中按混合料2.3%的烧失量来计算窑具产品生坯的尺寸,进一步的,步骤(3)中的生坯成型方法为高压真空挤出。
制得的堇青石-莫来石窑具经试验获得如下性能参数:
密度:1.18g/cm3;
膨胀系数(1000℃):1.32*10-6k-1;
常温抗折:23.6MPa;
高温抗折(1250℃*0.5h):20.9MPa;
现有技术中的堇青石-莫来石窑具经试验获得如下性能参数:
密度:1.52g/cm3;
膨胀系数(1000℃):1.8*10-6k-1;
常温抗折:15.4MPa;
高温抗折(1250℃*0.5h):14.6MPa;
通过上述试验数据可知,本发明制得环保型堇青石-莫来石窑具相比于现有技术中的堇青石-莫来石窑具,产品密度低、质量轻、抗折强度高、热震稳定性好。
实施例3
一种高热震稳定性堇青石-莫来石窑具,包括以下重量份的原料:硼泥39份、堇青石-莫来石熟料15份、废旧陶瓷22份、红土20份、泥岩12份、硅质岩10份、硅酸锆8份、氧化铝7份、羧甲基淀粉钠4份、柠檬酸钠2份。
具体的,废旧陶瓷按照计量百分数计包括以下化学组成:SiO2:70%、Al2O3:12%、MgO:8%、Fe2O3:7%、K2O:3%,进一步的,废旧陶瓷的粒度为0-0.5um。
进一步的,所述氧化铝的纯度≥96%。
一种高热震稳定性堇青石-莫来石窑具的制备方法,包括如下步骤:
(1)混料:将坯体各原料按其重量称重后,放入混料机搅拌25min,再按料:水:球为1:0.9:1.8,湿球磨18h;
(2)困料:将步骤(1)获得的混合料放入料箱中在45℃的温度下,保存27h;
(3)压制成型:根据所要制作窑具的产品形状,制作窑具产品生坯;
(4)干燥:将制得的生坯放入空气湿度为35%,温度为75℃的条件下,干燥22h,然后转入空气湿度为25%,温度为95℃的条件下,干燥33h;
(5)烧制:将干燥后的坯体送入窑炉,窑炉在还原气氛下经4.5h升温至950℃,保温37min,然后将窑炉转成氧化气氛,经2.5h升温至1250℃,保温1.5h,再将窑炉转成还原气氛,经1.5h升温至1365℃,保温2.5h,最后缓慢降温至室温,制得所述堇青石-莫来石窑具。
具体的,步骤(3)中按混合料2%的烧失量来计算窑具产品生坯的尺寸,进一步的,步骤(3)中的生坯成型方法先经过人工捣打,再经过辊压成型制备而成。
制得的堇青石-莫来石窑具经试验获得如下性能参数:
密度:1.11g/cm3;
膨胀系数(1000℃):1.26*10-6k-1;
常温抗折:24.2MPa;
高温抗折(1250℃*0.5h):21.5MPa;
现有技术中的堇青石-莫来石窑具经试验获得如下性能参数:
密度:1.52g/cm3;
膨胀系数(1000℃):1.8*10-6k-1;
常温抗折:15.4MPa;
高温抗折(1250℃*0.5h):14.6MPa;
通过上述试验数据可知,本发明制得环保型堇青石-莫来石窑具相比于现有技术中的堇青石-莫来石窑具,产品密度低、质量轻、抗折强度高、热震稳定性好。
本发明制备的堇青石-莫来石窑具以硼泥、废旧陶瓷、堇青石-莫来石熟料、红土为骨料,引入泥岩、硅质岩、硅酸锆、氧化铝、羧甲基淀粉钠、柠檬酸钠为基质材料组成本发明的窑具的坯体,硼泥的主要成分为氧化镁和氧化硅,可做高温耐火材料,泥岩和硅质岩富含氧化硅,与硼泥伍配,可大大提高制得的窑具热震稳定性和抗折强度,通过限制坯体的原料组成和制备方法,坯体需要依次经过还原-氧化-还原的煅烧,使最后制得的堇青石-莫来石窑具产品密度低、质量轻、抗折强度高、热震稳定性好。
以上所述,仅为本发明的较佳实施例而已,故不能以此限定本发明实施的范围,即依本发明申请专利范围及说明书内容所作的等效变化与修饰,皆应仍属本发明专利涵盖的范围内。
Claims (6)
1.一种高热震稳定性堇青石-莫来石窑具,其特征在于:包括以下重量份的原料:硼泥30-45份、堇青石-莫来石熟料10-20份、废旧陶瓷20-25份、红土15-25份、泥岩10-15份、硅质岩8-12份、硅酸锆5-10份、氧化铝5-8份、羧甲基淀粉钠3-5份、柠檬酸钠1-3份;
其制备方法,包括如下步骤:
(1)混料:将坯体各原料按其重量称重后,放入混料机搅拌20-30min,再按料:水:球为1:0.8-1:1.5-2,湿球磨15-20h;
(2)困料:将步骤(1)获得的混合料放入料箱中在40-50℃的温度下,保存24-30h;
(3)压制成型:根据所要制作窑具的产品形状,制作窑具产品生坯;
(4)干燥:将制得的生坯放入空气湿度为30-40%,温度为70-80℃的条件下,干燥20-25h,然后转入空气湿度为20-28%,温度为90-100℃的条件下,干燥30-36h;
(5)烧制:将干燥后的坯体送入窑炉,窑炉在还原气氛下经4-5h升温至950℃,保温30-45min,然后将窑炉转成氧化气氛,经2-3h升温至1250℃,保温1-2h,再将窑炉转成还原气氛,经1-2h升温至1350-1380℃,保温2-3h,最后缓慢降温至室温,制得所述堇青石-莫来石窑具。
2.根据权利要求1所述的一种高热震稳定性堇青石-莫来石窑具,其特征在于:所述废旧陶瓷按照计量百分数计包括以下化学组成:SiO2:65-75%、Al2O3:10-15%、MgO:5-10%、Fe2O3:5-8%、K2O:2-5%。
3.根据权利要求1所述的一种高热震稳定性堇青石-莫来石窑具,其特征在于:所述废旧陶瓷的粒度为0-0.5um。
4.根据权利要求1所述的一种高热震稳定性堇青石-莫来石窑具,其特征在于:所述氧化铝的纯度≥96%。
5.根据权利要求1所述的一种高热震稳定性堇青石-莫来石窑具,其特征在于:所述步骤(3)中按混合料1.8-2.3%的烧失量来计算窑具产品生坯的尺寸。
6.根据权利要求1所述的一种高热震稳定性堇青石-莫来石窑具,其特征在于:所述步骤(3)中的生坯成型方法包括半干法压制、高压真空挤出、高压注浆、人工捣打、滚压成型中任意一种或多种。
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