CN114736000B - 抗热震白坯及其制作工艺 - Google Patents
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Abstract
本发明涉及陶瓷技术领域,具体公开一种抗热震白坯及其制作工艺,抗热震白坯由如下重量份数的组分组成:龙岩高岭土20‑30份、钾长石15‑20份、锂辉石6‑8份、富钡熔块8‑12份。富钡熔块由如下重量份数的组分组成:铜尾矿10‑15份、碳粉2.5‑3份、钾长石10‑15份和细粒白云母花岗岩5‑15份。本发明富钡熔块中通过钾长石和碳粉配合铜尾矿熔制以产生大量氧化钡和少量氧化镁,继而在加入细粒白云母花岗岩后的熔制过程中硅铝反应生成莫来石相,而后加入的碳粉参与反应生成碳化物并促进加快莫来石相的连续生成,然后在与坯体其他组分混合烧制时形成致密网络骨架,可降低烧结温度和扩宽烧成范围,无需加入大量滑石即可制得吸水率小,白度高的抗热震白坯。
Description
技术领域
本发明属于陶瓷技术领域,具体涉及一种抗热震白坯及其制作工艺。
背景技术
镁质瓷的坯料配方组成范围为:烧滑石45%~50%,长石18%~22%,黏土80%~37%,属于MgO-Al2O3-SiO2三元***,其白度高(白度>85%),透明性好,吸水率较低(<0.5%),机械强度高,热稳定性好,但是烧成温度达1220℃以上,且烧成温度范围都较窄,不易控制。
另外,铜矿开采过程中会产生大量尾矿,铜矿尾矿是矿石在选取铜精矿粉后所排放的废渣,其化学组成主要有SiO2:48%-50%、BaO:20%-22%、CaO:2.0%-2.3%及MgO:6.0%-6.3%等。若能够利用这种富钡铜矿尾矿来制备陶瓷坯体,则有利于资源回收利用,节能环保。
发明内容
鉴于现有技术的不足,本发明所要解决的技术问题是提供一种抗热震白坯及其制作工艺,对铜矿尾矿进行综合开发利用,制得热稳定性佳、白度高的耐热坯体。
为解决上述技术问题,本发明采用的技术方案是:
抗热震白坯,由如下重量份数的组分组成:龙岩高岭土20-30份、钾长石15-20份、锂辉石6-8份、富钡熔块8-12份。
优选地,所述富钡熔块由如下重量份数的组分组成:铜尾矿10-15份、碳粉2.5-3份、钾长石10-15份和细粒白云母花岗岩5-15份。
优选地,所述富钡熔块的制备方法为:先将所述重量份数的铜尾矿和钾长石以及二分之一的碳粉混合研磨均匀后置于1400℃~1450℃温度下熔制60±10min,然后降温至1200℃~1250℃再加入所述重量份数的细粒白云母花岗岩继续熔制30±5min,最后加入剩余碳粉,混合均匀后接着熔制30±10min,再水淬冷却,并破碎成颗粒状,制得富钡熔块。
本发明还提供一种抗热震白坯的制作工艺,包括如下步骤:
S1、坯浆制作:混合各组分进行湿法球磨,调节坯浆浓度至48-51波美度,真空除泡制得坯浆;
S2、坯体成型:将步骤S1制得的坯浆进行压滤、陈泥,成型陶瓷坯体;
S3、入窑烧制:最高烧成温度为1060℃~1150℃。
优选地,所述真空除泡工艺条件为真空度为0.2MPa~0.4MPa,温度为50℃~60℃,转速为100r/min~120r/min。
优选地,所述步骤S3中的烧制过程为:以10℃/min~12℃/min快速升温至600℃~650℃,接着以6℃/min~8℃/min慢烧升温至900℃~920℃并保温40min-60min,然后以2℃/min~4℃/min缓慢升温至980℃~1020℃并保温60min-80min,再升温至1060℃~1150℃并保温烧制90min-120min,然后降至室温、出窑。
与现有技术相比,本发明具有以下有益效果:
本发明白坯由龙岩高岭土、钾长石、锂辉石和富钡熔块烧制而成,其中富钡熔块是先混合熔制铜尾矿、钾长石和碳粉后降温加入细粒白云母花岗岩继续熔制,最后再加入碳粉混合熔制、水淬、破碎制得,富钡熔块中通过钾长石和碳粉配合铜尾矿熔制以产生大量氧化钡和少量氧化镁,为坯体白度和热稳定性提供初步保障,继而在加入细粒白云母花岗岩后的熔制过程中硅铝反应生成莫来石相,而后加入的碳粉参与反应生成碳化物并促进加快莫来石相的连续生成,然后在与坯体其他组分混合烧制时形成致密网络骨架,可降低烧结温度和扩宽烧成范围,无需加入大量滑石即可制得吸水率小,白度高的抗热震坯体。另外,锂辉石有助于改善坯体的热稳定性和起到助熔作用。
具体实施方式
实施例1
本实施例提供一种抗热震白坯,由如下重量份数的组分组成:龙岩高岭土25份、钾长石15份、锂辉石6份、富钡熔块10份。
本实施例的所述富钡熔块由如下重量份数的组分组成:铜尾矿12份、碳粉3份、钾长石12份和细粒白云母花岗岩10份。该富钡熔块的制备方法为:先将所述重量份数的铜尾矿和钾长石以及二分之一的碳粉混合研磨均匀后置于1450℃温度下熔制60min,然后降温至1250℃再加入所述重量份数的细粒白云母花岗岩继续熔制30min,最后加入剩余碳粉,混合均匀后接着熔制30min,再水淬冷却,并破碎成颗粒状,制得富钡熔块。
本实施例抗热震白坯的制作工艺,包括如下步骤:
S1、坯浆制作:混合各组分进行湿法球磨,调节坯浆浓度至50波美度,真空除泡制得坯浆;真空除泡工艺条件为真空度为0.2MPa,温度为60℃,转速为100r/min。
S2、坯体成型:将步骤S1制得的坯浆进行压滤、陈泥,成型陶瓷坯体。
S3、入窑烧制:最高烧成温度为1100℃,烧制过程为:以10℃/min℃/min快速升温至600℃,接着以7℃/min慢烧升温至900℃并保温60min,然后以3℃/min缓慢升温至1000℃并保温60min,再升温至1120℃并保温烧制100min,然后降至室温、出窑。
实施例2
本实施例提供一种抗热震白坯,由如下重量份数的组分组成:龙岩高岭土30份、钾长石20份、锂辉石8份、富钡熔块8份。
本实施例的所述富钡熔块由如下重量份数的组分组成:铜尾矿15份、碳粉3份、钾长石10份和细粒白云母花岗岩15份。该富钡熔块的制备方法为:先将所述重量份数的铜尾矿和钾长石以及二分之一的碳粉混合研磨均匀后置于1450℃温度下熔制60min,然后降温至1200℃再加入所述重量份数的细粒白云母花岗岩继续熔制30min,最后加入剩余碳粉,混合均匀后接着熔制40min,再水淬冷却,并破碎成颗粒状,制得富钡熔块。
本实施例抗热震白坯的制作工艺,包括如下步骤:
S1、坯浆制作:混合各组分进行湿法球磨,调节坯浆浓度至48波美度,真空除泡制得坯浆;真空除泡工艺条件为真空度为0.4MPa,温度为55℃,转速为115r/min。
S2、坯体成型:将步骤S1制得的坯浆进行压滤、陈泥,成型陶瓷坯体。
S3、入窑烧制:最高烧成温度为1080℃,烧制过程为:以12℃/min快速升温至650℃,接着以6℃/min慢烧升温至900℃并保温60min,然后以2℃/min缓慢升温至980℃并保温80min,再升温至1050℃并保温烧制120min,然后降至室温、出窑。
实施例3
本实施例提供一种抗热震白坯,由如下重量份数的组分组成:龙岩高岭土20份、钾长石15份、锂辉石6份、富钡熔块12份。
本实施例的所述富钡熔块由如下重量份数的组分组成:铜尾矿10份、碳粉2.5份、钾长石15份和细粒白云母花岗岩8份。该富钡熔块的制备方法为:先将所述重量份数的铜尾矿和钾长石以及二分之一的碳粉混合研磨均匀后置于1450℃温度下熔制60min,然后降温至1250℃再加入所述重量份数的细粒白云母花岗岩继续熔制35min,最后加入剩余碳粉,混合均匀后接着熔制30min,再水淬冷却,并破碎成颗粒状,制得富钡熔块。
本实施例抗热震白坯的制作工艺,包括如下步骤:
S1、坯浆制作:混合各组分进行湿法球磨,调节坯浆浓度至51波美度,真空除泡制得坯浆;真空除泡工艺条件为真空度为0.3MPa,温度为50℃,转速为120r/min。
S2、坯体成型:将步骤S1制得的坯浆进行压滤、陈泥,成型陶瓷坯体。
S3、入窑烧制:最高烧成温度为1100℃,烧制过程为:以10℃/min快速升温至600℃,接着以8℃/min慢烧升温至920℃并保温40min,然后以4℃/min缓慢升温至1020℃并保温60min,再升温至1150℃并保温烧制90min,然后降至室温、出窑。
对比例1
该对比例与上述实施例1的区别仅在于:富钡熔块的制备步骤不同。具体为:先将所述重量份数的铜尾矿、钾长石和碳粉混合研磨均匀后置于1450℃温度下熔制60min,然后降温至1250℃再加入所述重量份数的细粒白云母花岗岩继续熔制30min,再水淬冷却,并破碎成颗粒状,制得富钡熔块。
分别取本发明实施例1-3和对比例1制得的坯体进行物性检测,参见表1。
表1:本发明实施例1-3和对比例1的物性测试结果表
以上显示和描述了本发明创造的基本原理和主要特征及本发明的优点,本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明创造精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内,本发明要求保护范围由所附的权利要求书及其等效物界定。
Claims (4)
1.抗热震白坯,其特征在于:由如下重量份数的组分组成:龙岩高岭土20-30份、钾长石15-20份、锂辉石6-8份、富钡熔块8-12份;
所述富钡熔块由如下重量份数的组分组成:铜尾矿10-15份、碳粉2.5-3份、钾长石10-15份和细粒白云母花岗岩5-15份;
所述富钡熔块的制备方法为:先将所述重量份数的铜尾矿和钾长石以及二分之一的碳粉混合研磨均匀后置于1400℃~1450℃温度下熔制60±10min,然后降温至1200℃~1250℃再加入所述重量份数的细粒白云母花岗岩继续熔制30±5min,最后加入剩余碳粉,混合均匀后接着熔制30±10min,再水淬冷却,并破碎成颗粒状,制得富钡熔块;
该抗热震白坯的制作工艺,包括如下步骤:
S1、坯浆制作:混合各组分进行湿法球磨,调节坯浆浓度至48-51波美度,真空除泡制得坯浆;
S2、坯体成型:将步骤S1制得的坯浆进行压滤、陈泥,成型陶瓷坯体;
S3、入窑烧制:最高烧成温度为1060℃~1150℃。
2.一种如权利要求1所述的抗热震白坯的制作工艺,其特征在于:包括如下步骤:
S1、坯浆制作:混合各组分进行湿法球磨,调节坯浆浓度至48-51波美度,真空除泡制得坯浆;
S2、坯体成型:将步骤S1制得的坯浆进行压滤、陈泥,成型陶瓷坯体;
S3、入窑烧制:最高烧成温度为1060℃~1150℃。
3.根据权利要求2所述的抗热震白坯的制作工艺,其特征在于:所述真空除泡工艺条件为真空度为0.2MPa~0.4MPa,温度为50℃~60℃,转速为100r/min~120r/min。
4.根据权利要求2所述的抗热震白坯的制作工艺,其特征在于:所述步骤S3中的烧制过程为:以10℃/min~12℃/min快速升温至600℃~650℃,接着以6℃/min~8℃/min慢烧升温至900℃~920℃并保温40min-60min,然后以2℃/min~4℃/min缓慢升温至980℃~1020℃并保温60min-80min,再升温至1060℃~1150℃并保温烧制90min-120min,然后降至室温、出窑。
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