CN109020517A - 一种耐火浇注料的制备方法 - Google Patents

一种耐火浇注料的制备方法 Download PDF

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CN109020517A
CN109020517A CN201810966610.5A CN201810966610A CN109020517A CN 109020517 A CN109020517 A CN 109020517A CN 201810966610 A CN201810966610 A CN 201810966610A CN 109020517 A CN109020517 A CN 109020517A
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董舜杰
姜辉
周键
万志华
蒋杰
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Anhui Ruitai New Materials & Technology Co Ltd
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Abstract

本发明涉及浇注料技术领域,具体公开了一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉55‑78份、蓝晶石粉12‑19份、钡长石粉2‑7份、铝酸钙水泥5‑11.5份、硫酸钙3‑8.5份、氟化钙2‑9.5份、防渗助剂1.5‑4.5份、防爆纤维4.5‑9份、分散剂1.5‑4份、硅酸钠6‑14份、硅酸钾2.5‑7.5份、稀土0.1‑0.5份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨40‑60min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料。本发明得到的耐火浇注料具有优异的防渗性能。

Description

一种耐火浇注料的制备方法
技术领域
本发明涉及浇注料技术领域,具体涉及一种耐火浇注料的制备方法。
背景技术
自流浇注料,是指低水泥、超低水泥或水泥耐火浇注料以其混合后的流动性为特征,具有这种流动性的耐火浇注料无需施加外力即可流动和脱气,且无明显偏析。由于自流浇注料具有良好的流动特性,近年来已引起人们的关注。
用于大型铝熔炼炉进铝口斜沟底部﹑侧壁及流铝槽的浇注料不仅要抵抗铝液的周期性冲刷引起的物理损伤及热震冲击,更重要的是要抗铝液润湿,不与铝液中的合金成分反应,进而影响铝合金产品的成分。现有浇注料抗铝液的渗透能力较差,不能满足市场需求。
发明内容
基于背景技术存在的技术问题,本发明提出了一种耐火浇注料的制备方法。本发明得到的浇注料具有优异的防渗性能。
本发明提出的一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉55-78份、蓝晶石粉12-19份、钡长石粉2-7份、铝酸钙水泥5-11.5份、硫酸钙3-8.5份、氟化钙2-9.5份、防渗助剂1.5-4.5份、防爆纤维4.5-9份、分散剂1.5-4份、硅酸钠6-14份、硅酸钾2.5-7.5份、稀土0.1-0.5份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨40-60min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料。
优选地,所述防渗助剂的制备方法为:取铁粉和氮化铬粉混合均匀,烧结处理,保温处理,得到防渗助剂。
优选地,所述防渗助剂的制备方法为:取铁粉和氮化铬粉按照1:1.3-1.8的质量比混合均匀,在1400-1600℃下烧结处理2-4h,保温处理1.5-2.5h,得到防渗助剂。
优选地,所述耐火浇注料的原料组成及重量比为:棕刚玉60-70份、蓝晶石粉14-17份、钡长石粉3-5份、铝酸钙水泥7-10份、硫酸钙4-7份、氟化钙4-7份、防渗助剂2-4份、防爆纤维6-8份、分散剂2-3.5份、硅酸钠8-11份、硅酸钾3-6份、稀土0.2-0.4份。
优选地,所述棕刚玉为粒径不大于2mm的电熔棕刚玉。
优选地,所述蓝晶石粉的粒径为不大于0.095mm。
优选地,所述防爆纤维为聚丙烯腈纤维、聚酯纤维或丙纶纤维。
优选地,所述分散剂由三聚磷酸钠和聚羧酸盐按照1:0.4-1.3的重量比组成。
本发明的原料包括棕刚玉、蓝晶石粉、钡长石粉、铝酸钙水泥、硫酸钙、氟化钙、防渗助剂、防爆纤维、分散剂、硅酸钠、硅酸钾、稀土,其中,各原料配合作用能够赋予本发明良好的基础性能。优选方案中,在防渗助剂的制备中,将铁粉和氮化铬粉进行烧结制得致密的Fe/CrN复合物,在熔铝炉中高温的条件下,铝液中的Al会与CrN反应生成氧化铝,与Fe反应生成Fe-Al化合物,提高浇注料的硬度和抗氧化性能,大大削弱了铝液的渗透能力,此外,当其他合金元素渗入时,合金元素会进入CrN晶胞中,取代部分CrN原来的位置从而形成(Crx,Me1-x)N化合物,进一步提高浇注料的硬度和抗氧化性能;加入硫酸钙和氟化钙,其能够增大铝液与浇注料的润湿角,与防渗助剂配合作用,能够进一步优化本发明的防渗性能。
具体实施方式
下面,通过具体实施例对本发明的技术方案进行详细说明。
实施例1
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉55份、蓝晶石粉19份、钡长石粉2份、铝酸钙水泥11.5份、硫酸钙3份、氟化钙9.5份、防渗助剂1.5份、防爆纤维9份、分散剂1.5份、硅酸钠14份、硅酸钾2.5份、稀土0.5份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨45min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料。
实施例2
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉78份、蓝晶石粉12份、钡长石粉7份、铝酸钙水泥5份、硫酸钙8.5份、氟化钙2份、防渗助剂4.5份、防爆纤维4.5份、分散剂4份、硅酸钠6份、硅酸钾7.5份、稀土0.1份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨55min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料;
其中,所述防渗助剂的制备方法为:取铁粉和氮化铬粉混合均匀,烧结处理,保温处理,得到防渗助剂。
实施例3
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉65份、蓝晶石粉15份、钡长石粉4份、铝酸钙水泥9份、硫酸钙5份、氟化钙6份、防渗助剂3份、防爆纤维7份、分散剂3份、硅酸钠9份、硅酸钾5份、稀土0.3份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨50min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料;
其中,所述防渗助剂的制备方法为:取铁粉和氮化铬粉按照1:1.5的质量比混合均匀,在1500℃下烧结处理3h,保温处理2h,得到防渗助剂;
所述棕刚玉为粒径不大于2mm的电熔棕刚玉;
所述蓝晶石粉的粒径为不大于0.095mm;
所述防爆纤维为聚丙烯腈纤维;
所述分散剂由三聚磷酸钠和聚羧酸盐按照1:0.8的重量比组成。
实施例4
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉60份、蓝晶石粉17份、钡长石粉3份、铝酸钙水泥10份、硫酸钙4份、氟化钙7份、防渗助剂2份、防爆纤维8份、分散剂2份、硅酸钠11份、硅酸钾3份、稀土0.4份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨40min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料;
其中,所述防渗助剂的制备方法为:取铁粉和氮化铬粉按照1:1.8的质量比混合均匀,在1400℃下烧结处理4h,保温处理1.5h,得到防渗助剂;
所述棕刚玉为粒径不大于2mm的电熔棕刚玉;
所述蓝晶石粉的粒径为不大于0.095mm;
所述防爆纤维为聚酯纤维;
所述分散剂由三聚磷酸钠和聚羧酸盐按照1:1.3的重量比组成。
实施例5
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉70份、蓝晶石粉14份、钡长石粉5份、铝酸钙水泥7份、硫酸钙7份、氟化钙4份、防渗助剂4份、防爆纤维6份、分散剂3.5份、硅酸钠8份、硅酸钾6份、稀土0.2份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨60min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料;
其中,所述防渗助剂的制备方法为:取铁粉和氮化铬粉按照1:1.3的质量比混合均匀,在1600℃下烧结处理2h,保温处理2.5h,得到防渗助剂;
所述棕刚玉为粒径不大于2mm的电熔棕刚玉;
所述蓝晶石粉的粒径为不大于0.095mm;
所述防爆纤维为丙纶纤维;
所述分散剂由三聚磷酸钠和聚羧酸盐按照1:0.4的重量比组成。
对比例1
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉70份、蓝晶石粉14份、钡长石粉5份、铝酸钙水泥7份、硫酸钙7份、防爆纤维6份、分散剂3.5份、硅酸钠8份、硅酸钾6份、稀土0.2份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨60min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料;
其中,所述棕刚玉为粒径不大于2mm的电熔棕刚玉;
所述蓝晶石粉的粒径为不大于0.095mm;
所述防爆纤维为丙纶纤维;
所述分散剂由三聚磷酸钠和聚羧酸盐按照1:0.4的重量比组成。
对比例2
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉70份、蓝晶石粉14份、钡长石粉5份、铝酸钙水泥7份、氟化钙4份、防爆纤维6份、分散剂3.5份、硅酸钠8份、硅酸钾6份、稀土0.2份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨60min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料;
其中,所述棕刚玉为粒径不大于2mm的电熔棕刚玉;
所述蓝晶石粉的粒径为不大于0.095mm;
所述防爆纤维为丙纶纤维;
所述分散剂由三聚磷酸钠和聚羧酸盐按照1:0.4的重量比组成。
对比例3
一种耐火浇注料的制备方法,所述耐火浇注料的原料组成及重量比为:棕刚玉70份、蓝晶石粉14份、钡长石粉5份、铝酸钙水泥7份、防渗剂4份、防爆纤维6份、分散剂3.5份、硅酸钠8份、硅酸钾6份、稀土0.2份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨60min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料;
其中,所述防渗剂的制备方法为:取铁粉和氮化铬粉按照1:1.3的质量比混合均匀,在1600℃下烧结处理2h,保温处理2.5h,得到防渗剂;
所述棕刚玉为粒径不大于2mm的电熔棕刚玉;
所述蓝晶石粉的粒径为不大于0.095mm;
所述防爆纤维为丙纶纤维;
所述分散剂由三聚磷酸钠和聚羧酸盐按照1:0.4的重量比组成。
试验例
分别对实施例1-5以及对比例1-3得到的浇注料进行防渗性能测试,依次记为试验组1-5和对照组1-3。
测试步骤为:
制备试样:将浇注料浇注加工成30mm×40mm×65mm的条状试样。
渗铝试验:将一定量的铝合金棒置于合适大小的碳化硅匣钵中,在箱式电炉中加热至850℃熔化并保温。同时,将30mm×40mm×65mm的试样放入马弗炉中,于850℃保温至少1h后取出,立即直立放入已于850℃保温30min的铝液中(铝液深度为45mm左右),继续保温72h后取出试样,并将其纵向对称剖开,测量其侵蚀面积。
各组结果如下表:
由上表可以看出,加入防渗助剂后能够显著提高本发明的防渗性能,且与硫酸钙、氟化钙配合作用后能够进一步优化本发明的防渗性能。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。

Claims (8)

1.一种耐火浇注料的制备方法,其特征在于,所述耐火浇注料的原料组成及重量比为:棕刚玉55-78份、蓝晶石粉12-19份、钡长石粉2-7份、铝酸钙水泥5-11.5份、硫酸钙3-8.5份、氟化钙2-9.5份、防渗助剂1.5-4.5份、防爆纤维4.5-9份、分散剂1.5-4份、硅酸钠6-14份、硅酸钾2.5-7.5份、稀土0.1-0.5份;制备时,按照所述重量比,首先将棕刚玉、硫酸钙、氟化钙和防渗助剂在振动磨中共磨40-60min;得到均化粉,再将均化粉和其它组分混合,混练均匀,得到耐火浇注料。
2.根据权利要求1所述耐火浇注料的制备方法,其特征在于,所述防渗助剂的制备方法为:取铁粉和氮化铬粉混合均匀,烧结处理,保温处理,得到防渗助剂。
3.根据权利要求1或2所述耐火浇注料的制备方法,其特征在于,所述防渗助剂的制备方法为:取铁粉和氮化铬粉按照1:1.3-1.8的质量比混合均匀,在1400-1600℃下烧结处理2-4h,保温处理1.5-2.5h,得到防渗助剂。
4.根据权利要求1或2所述耐火浇注料的制备方法,其特征在于,所述耐火浇注料的原料组成及重量比为:棕刚玉60-70份、蓝晶石粉14-17份、钡长石粉3-5份、铝酸钙水泥7-10份、硫酸钙4-7份、氟化钙4-7份、防渗助剂2-4份、防爆纤维6-8份、分散剂2-3.5份、硅酸钠8-11份、硅酸钾3-6份、稀土0.2-0.4份。
5.根据权利要求1或2所述耐火浇注料的制备方法,其特征在于,所述棕刚玉为粒径不大于2mm的电熔棕刚玉。
6.根据权利要求1或2所述耐火浇注料的制备方法,其特征在于,所述蓝晶石粉的粒径为不大于0.095mm。
7.根据权利要求1或2所述耐火浇注料的制备方法,其特征在于,所述防爆纤维为聚丙烯腈纤维、聚酯纤维或丙纶纤维。
8.根据权利要求1或2所述耐火浇注料的制备方法,其特征在于,所述分散剂由三聚磷酸钠和聚羧酸盐按照1:0.4-1.3的重量比组成。
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