CN113896517A - 一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法 - Google Patents
一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法 Download PDFInfo
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Abstract
本发明涉及到一种利用铝矾土熟料废料制备莫来石‑刚玉质复相陶瓷的方法,属于固废高值材料化利用技术领域。本发明采用铝矾土熟料废料和锂瓷石为主要原料,经过破碎、分级、配料、混料、干燥、成型、烧结工艺进行处理得到的莫来石‑刚玉质复相陶瓷材料。锂瓷石的加入可以降低烧结温度,提高莫来石‑刚玉质复相材料的致密度和力学性能,可为铝矾土熟料废料高值化利用提供技术支撑。
Description
技术领域
本发明涉及一种利用铝矾土熟料废料制备莫来石-刚玉莫来石-刚玉质复相陶瓷的方法,属于固废高值材料化利用技术领域。
背景技术
近几年,随着我国城市化建设的快速发展,对铝资源的需求不断增加,铝资源主要来源于对铝土矿的开采。目前,我国已经成为世界第一大铝生产国和消费国,同时也是全球铝土矿消耗量最大的国家。然而,我国铝土矿多存在品相较低的问题,在煅烧的过程中,铝矾土熟料的产出伴随着废料生成。铝矾土熟料废料的堆积造成大量资源的浪费,占用土地,产生扬尘,造成严重的空气污染。铝矾土熟料工业的大体量所产生的废料堆积问题已不容忽视。因此,如何快速经济的处理这些固体废弃物,并增强其利用价值成为我们关注的话题。
目前,我国针对固体废弃物处理方式主要有回收有价元素、填充采空区、尾矿复合肥或土壤改良及以及制备建筑材料及道路材料等方法,核心是根据废料的性质进行再次利用。莫来石-刚玉质复相陶瓷作为建筑材料中陶瓷材料的一种,因其兼具莫来石相热膨胀系数低、抗震性好和熔点高的特点以及刚玉相高耐磨性、弹性好的特点,具有高性价比,已经成为当今热门的抗热震陶瓷之一,得到广泛关注。
针对铝矾土熟料废料具有富含莫来石相和刚玉相的特性,可以用来制备莫来石-刚玉质复相陶瓷。因此本发明创造的采用铝矾土熟料废料与锂瓷石低温烧结的方法,制备得到莫来石-刚玉质复相陶瓷,其中锂瓷石的加入可以有效降低复相陶瓷烧结的反应温度,大大降低生产成本,为铝矾土熟料废料的高值化利用提供了技术支撑,具有重要的应用价值和技术创新意义。
发明内容
本发明的目的在于提供一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法,用以解决现有铝矾土熟料废料制备陶瓷烧成温度高,生产成本高的问题。
为实现上述目的,本发明的技术方案如下:
本发明是一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法,其特征在于:
利用铝矾土熟料废料为原料,外加锂瓷石,经过破碎、分级、配料、混料、干燥、成型、烧结工艺,制备得到莫来石-刚玉质复相陶瓷材料。
本发明提出的一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法,
铝矾土熟料废料占80-95wt%,其主要成分为氧化铝含量30-60wt%,二氧化硅含量20-60wt%,氧化铁含量1-10wt%,二氧化钛含量0.3-15wt%,其他杂质总含量不超过5wt%;锂瓷石粉体占5-20wt%,其主要成分为二氧化硅含量50-70wt%,氧化铝含量10-30wt%,氧化锂、氧化钾、氧化钙、氧化纳总含量7-15wt%,其他物质含量小于5wt%。
所用低温烧结温度为800℃-1000℃、升温速率2-10℃/min、保温时间1-10h。
本发明具有如下优点:
利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷,铝矾土熟料废料的添加量高,制备工艺简单,成本较低;锂瓷石的加入可以降低烧结温度,提高莫来石-刚玉质复相材料的致密度和力学性能。可为铝矾土熟料废料的高值化利用提供技术支撑。
具体实施方式
以下实施例用于说明本发明,但不用来限制本发明的范围。
实施例1
原料:铝矾土熟料废料为工业固体废弃物,主要成分为氧化铝含量53wt%,二氧化硅含量33wt%,氧化铁含量8wt%,二氧化钛含量4wt%,以及少量的氧化铬、氧化钾、氧化钙等杂质。
锂瓷石主要成分为二氧化硅含量为65%wt,氧化铝含量为20wt%,氧化锂、氧化钾、氧化钙、氧化钠总含量为10wt%,其他物质含量小于5wt%。
将上述的两种原料按质量比进行配料,其中铝矾土熟料废料占85wt%,锂瓷石占15wt%。按配料:刚玉球:水=1:1.5:2的比例称量后放入球磨机中,湿磨3h后,90℃干燥48h,在磨粉机中磨成粉,放入磨具中压制成型后进行烧结,烧结温度为960℃、升温速率5℃/min、保温时间2h。
所得的铝矾土熟料废料陶瓷抗压强度超过70MPa,体积密度为2.408g/cm3,线收缩率为0.18%,在1000℃下水冷的抗热震性能80次。
实施例2
原料:铝矾土熟料废料为工业固体废弃物,主要成分为氧化铝含量53wt%,二氧化硅含量33wt%,氧化铁含量8wt%,二氧化钛含量4wt%,以及少量的氧化铬、氧化钾、氧化钙等杂质。
锂瓷石主要成分为二氧化硅含量为65%wt,氧化铝含量为20wt%,氧化锂、氧化钾、氧化钙、氧化钠总含量为10wt%,其他物质含量小于5wt%。
将上述的两种原料按质量比进行配料,其中铝矾土熟料废料占85wt%,锂瓷石占15wt%。按配料:刚玉球:水=1:1.5:2的比例称量后放入球磨机中,湿磨3h后,90℃干燥48h,在磨粉机中磨成粉,放入磨具中压制成型后进行烧结,烧结温度为980℃、升温速率5℃/min、保温时间2h。
所得的铝矾土熟料废料陶瓷抗压强度超过79MPa,体积密度为2.454g/cm3,线收缩率为1.05%,在1000℃下水冷的抗热震性能81次。
实施例3
原料:铝矾土熟料废料为工业固体废弃物,主要成分为氧化铝含量53wt%,二氧化硅含量33wt%,氧化铁含量8wt%,二氧化钛含量4wt%,以及少量的氧化铬、氧化钾、氧化钙等杂质。
锂瓷石主要成分为二氧化硅含量为65%wt,氧化铝含量为20wt%,氧化锂、氧化钾、氧化钙、氧化钠总含量为10wt%,其他物质含量小于5wt%。
将上述的两种原料按质量比进行配料,其中铝矾土熟料废料占85wt%,锂瓷石占15wt%。按配料:刚玉球:水=1:1.5:2的比例称量后放入球磨机中,湿磨3h后,90℃干燥48h,在磨粉机中磨成粉,放入磨具中压制成型后进行烧结,烧结温度为1000℃、升温速率5℃/min、保温时间2h。
所得的铝矾土熟料废料陶瓷抗压强度超过85MPa,体积密度为2.533g/cm3,线收缩率为1.94%,在1000℃下水冷的抗热震性能83次。
虽然,上文中已经用一般性说明及具体实施例对本发明作了详尽的描述,但在本发明基础上,可以对之作一些修改或改进,这对本领域技术人员而言是显而易见的。因此,在不偏离本发明精神的基础上所做的这些修改或改进,均属于本发明要求保护的范围。
Claims (4)
1.一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法,其特征在于:
利用铝矾土熟料废料为原料,外加锂瓷石,经过破碎、分级、配料、混料、干燥、成型、烧结工艺,制备得到莫来石-刚玉质复相陶瓷材料。
2.权利要求1所述的一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法,其特征在于:
所用的烧结温度为800-1000℃,升温速率为2-10℃/min,烧结时间为1-10h。
3.权利要求1所述的一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法,其特征在于:
铝矾土熟料废料占80-95wt%,其主要成分为氧化铝含量30-60wt%,二氧化硅含量20-60wt%,氧化铁含量1-10wt%,二氧化钛含量0.3-15wt%,其他杂质总含量不超过5wt%;锂瓷石粉体占5-20wt%,其主要成分为二氧化硅含量50-70wt%,氧化铝含量10-30wt%,氧化锂、氧化钾、氧化钙、氧化纳总含量7-15wt%,其他物质含量小于5wt%。
4.根据权利要求1所述的一种利用铝矾土熟料废料制备莫来石-刚玉质复相陶瓷的方法,其特征在于:
该方法制备得到的莫来石-刚玉质复相陶瓷材料抗压强度高于70MPa,体积密度大于2.4g/cm3,在1000℃下水冷的抗热震性能达80次以上。
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