CN112898035B - 保温钢包包盖专用浇注料以及包盖制造方法 - Google Patents

保温钢包包盖专用浇注料以及包盖制造方法 Download PDF

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CN112898035B
CN112898035B CN202110363401.3A CN202110363401A CN112898035B CN 112898035 B CN112898035 B CN 112898035B CN 202110363401 A CN202110363401 A CN 202110363401A CN 112898035 B CN112898035 B CN 112898035B
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侯会峰
侯振东
刘大圈
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Zhengzhou Zhendong Technology Co ltd
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Abstract

本发明公开了一种保温钢包包盖专用浇注料以及包盖制造方法,浇注料是由一级高铝矾土熟料70%(粒度10‑6mm的颗粒料15%,粒度6‑3mm的颗粒料25%,粒度3‑1mm的颗粒料15%,粒度1‑0mm的颗粒料15%),尖晶石粉5%,一级铝粉16%,电熔镁粉2%,金属铝粉0.5%,Na2HCO3 0.4%,偶氮酰胺1%,塞卡71水泥3%,九水偏硅酸钠2%,防爆纤维0.1%配制而成。使用时,将上述原料准确称量并预混均匀后,按混合料总重的7%加水搅拌成浇注料,浇注在包盖模型中预制成型,经常温养护24小时后,即得到包盖成品。本发明浇注成型后无需烘烤,自然干燥即可快速排除水分,包盖遇高温更坚固,不裂纹、不剥落,耐高温侵袭、抗热震,可适应钢包高温变化;使用寿命是普通包盖的2倍,节约了材料成本。

Description

保温钢包包盖专用浇注料以及包盖制造方法
技术领域
本发明涉及高温铁水转运容器--钢包,尤其是涉及一种保温钢包包盖专用浇注料,本发明还涉及包盖的制造方法。
背景技术
钢包是将高温钢水从转炉或电炉运送到连铸机之间的转运容器,同时又承担着二次炉外精炼的任务。由于在吊运、精炼过程中会有大量的热量外散流失,所以转运时还需要提高钢水的出炉温度或者精炼时的温度。为减少热量流失,大部分钢厂开始在钢包上增加包盖,以预防钢水温度外散流失。
转运过程中,钢包盖虽然不接触钢水,但是要经受钢水的高温环境和高温气体对包盖的侵袭,温度最高时可达1200℃以上,同时还要经受温度的急剧变化,因此包盖里层的浇注料要求具有耐高温、强度高、不易脱落、抗热震良好等特性。
由于使用部位和环境较为特殊,现有钢包包盖一般由浇注料浇筑成型,进行烘烤后再使用,其烘烤曲线要求为:先常温养护24h,然后从常温升至500℃后再烘烤12-24h,最后再从500℃升至800℃后烘烤6-12h,时间总长为60h左右,如果烘烤时间不到或升温过快,就会出现浇注料内水分未及时排出,水蒸气压力过大造成包盖料脱落或者爆裂的现象。同时采用的耐高温材料由于不耐钢包温度气体的侵袭,非常容易出现裂纹、脱落,寿命短,使用效果非常不好。
发明内容
本发明的目的在于提供一种使用寿命长,能满足钢包使用要求的保温钢包包盖专用浇注料,本发明还提供保温钢包包盖的制造方法。
为实现上述目的,本发明可采取下述技术方案:
本发明所述的保温钢包包盖专用浇注料,是由原料一级高铝矾土熟料、尖晶石粉、一级铝粉、电熔镁粉、金属铝粉、Na2HCO3、偶氮酰胺、塞卡71水泥、九水偏硅酸钠和防爆纤维按照下述重量百分比配制而成:
一级高铝矾土熟料70%,其中:粒度10-6mm的颗粒料15%,粒度6-3mm的颗粒料25%,粒度3-1mm的颗粒料15%,粒度1-0mm的颗粒料15%;
尖晶石粉5%;
一级铝粉16%;
电熔镁粉2%;
金属铝粉0.5%;
Na2HCO3 0.4%;
偶氮酰胺1%;
塞卡71水泥3%;
九水偏硅酸钠2%
防爆纤维0.1%。
为保证浇注料的质量要求,所用一级高铝矾土熟料中Al2O3≥85%,体积密度>3.10g/cm3
所述尖晶石粉中AL2O3≥70%,MgO≥25%;所述一级铝粉细度为180目,Al2O3≥80%;所述电熔镁粉细度为180目,MgO≥97%;所述金属铝粉细度为100目,纯度≥99%。
本发明保温钢包包盖的制造方法,包括如下步骤:
第一步,按本发明设计的原料配比准确称量各原料,搅拌混合均匀后,按原料总重的7%加水搅拌混合成浇注料,浇筑在包盖模型中预制成型;
第二步,常温养护24小时后,即可得到包盖成品;经检测,成品包盖的理化指标如下:
Figure DEST_PATH_IMAGE001
本发明的包盖专用浇注料采用一级高铝钒土做骨架,强度高,耐火度高,体积稳定;采用电熔镁粉做膨胀剂,在高温下,镁砂粉与一级铝粉生成尖晶石有一定膨胀量来弥补浇注料的收缩裂纹;采用赛卡71水泥和九水偏硅酸钠做结合剂来产生较高的强度,采用金属铝粉、Na2HCO3、防爆纤维增加气孔率,来打开浇注料的疏水通道;采用偶氮酰胺做发泡剂,可以增加闭口气孔减少体积密度,增加浇注料的保温性能。
本发明的优点在于:
1、浇注成型后无需烘烤,自然干燥即可快速排除水分,制作方法简单;
2、成型包盖遇高温更坚固,不裂纹、不剥落,耐高温侵袭、抗热震,可适应钢包高温变化。
3、试验证明,本发明生产的钢包包盖使用寿命是普通包盖的2倍,节约了材料成本,降低了能源消耗,提高了效益。
具体实施方式
下面通过具体实施例对本发明做更加详细的说明,以便于本领域技术人员的理解。
本发明所用原料高铝矾土熟料、尖晶石粉、一级铝粉、电熔镁粉、金属铝粉、Na2HCO3、偶氮酰胺、塞卡71水泥、九水偏硅酸钠和防爆纤维等均为市售产品,采用的混料机等均为常规设备。
本发明的保温钢包包盖专用浇注料,是按照一级高铝矾土熟料70%(其中按下述粒度级配进行配比:粒度10-6mm的颗粒料15%,粒度6-3mm的颗粒料25%,粒度3-1mm的颗粒料15%,粒度1-0mm的颗粒料15%);尖晶石粉5%;一级铝粉16%;电熔镁粉2%;金属铝粉0.5%;Na2HCO3 0.4%;偶氮酰胺1%;塞卡71水泥3%;九水偏硅酸钠2%;防爆纤维0.1%配制而成;使用时,将上述原料准确称量并预混均匀后,按混合料总重的7%加水搅拌成浇注料,浇注在包盖模型中预制成型,经常温养护24小时后,即得到包盖成品。
本发明配制的保温钢包包盖专用浇注料经在河北普阳钢铁厂60吨钢包上使用,寿命可达300炉以上,是普通包盖料寿命的两倍。寿命长保温效果好,并且不用烘烤,常温养护后即可上线使用。
河北九江线材有限公司120吨钢包,原来的包盖料由于高温强度低,在钢包运输过程和翻包过程中有轻微振动,再加上高温气体的腐蚀和冲击,易引起包盖料的脱落,破损,使用到150炉左右就要下线维修;2020年采用本申请配制的专用包盖浇注料,在未烘烤的情况下,在线使用了310炉,中间过程没有出现脱落和掉块现象,使用效果良好。

Claims (2)

1.一种保温钢包包盖专用浇注料,其特征在于:是由原料一级高铝矾土熟料、尖晶石粉、一级铝粉、电熔镁粉、金属铝粉、Na2HCO3、偶氮酰胺、塞卡71水泥、九水偏硅酸钠和防爆纤维按照下述重量百分比配制而成:
一级高铝矾土熟料70%,其中:粒度10-6mm的颗粒料15%,粒度6-3mm的颗粒料25%,粒度3-1mm的颗粒料15%,粒度1-0mm的颗粒料15%;
尖晶石粉5%;
一级铝粉16%,其细度为180目,Al2O3≥80%;
电熔镁粉2%;
金属铝粉0.5%,其细度为100目,纯度≥99%;
Na2HCO3 0.4%;
偶氮酰胺1%;
塞卡71水泥3%;
九水偏硅酸钠2%;
防爆纤维0.1%;
其中,保温钢包包盖的制造方法,包括以下步骤:
第一步,上述原料配比准确称量各原料,搅拌混合均匀后,加水7%搅拌混合成浇注料,浇筑在包盖模型中预制成型;
第二步,常温养护24小时后,得到包盖成品。
2.根据权利要求1所述的保温钢包包盖专用浇注料,其特征在于:所述尖晶石粉中Al2O3≥70%,MgO≥25%;所述电熔镁粉细度为180目,MgO≥97%。
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