CN105859264A - 一种致密刚玉质电炉顶盖及其制备方法 - Google Patents
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Abstract
本发明公开了一种致密刚玉质电炉顶盖及其制备方法,由以下重量份的原料组成:骨料A:致密刚玉54‑58份;骨料B:重质莫来石12‑16份;粉料:水泥 2.5‑3.5份,α氧化铝粉 2.5‑3.5份,碳化硅粉 7‑9份,蓝晶石粉2.5‑3.5份,硅微粉 0.8‑1.2份,致密刚玉粉 10‑14份。本发明中,采用致密刚玉和重质莫来石作为骨料,以水泥及α氧化铝粉、碳化硅、蓝晶石、微硅粉和致密刚玉粉作为粉料,制备的致密刚玉质电炉顶盖具有良好的抗热震性、抗侵蚀性及耐火性,使用寿命长。
Description
技术领域
本发明属于耐火材料领域,具体涉及一种致密刚玉质电炉顶盖及其制备方法。
背景技术
1905年美国建成了小型电炉,从此揭开了电炉炼钢的序幕,从此世界上一些国家也相继开始了电炉炼钢,随着电炉炼钢的不断发展,容量不断扩大,功率也随之扩大,超高功率电弧炉也产生了,由于炼钢时间短,具有明显的经济效益,随着特殊钢需求的增加,未来还将有更大的发展。
电弧炉装有易于移动的(或吊起、或旋转)炉盖,它带有伸入电极的电极孔和从炉内抽烟气的排烟孔,炉顶吊开炉盖加料时,温度急变,受渣的喷溅和烟气的侵蚀及热辐射的作用,这就要求炉顶用耐火材料必须具有良好的热震稳定性,抗侵蚀性及较高的耐火度(高温性能),电炉炼钢的强化使炉盖的使用条件变得更加苛刻,炉盖用耐火材料也随之发生变化,材料变化趋势大致为硅砖→高铝砖→碱性砖。
采用成型砖砌筑炉盖有很多缺点,一是对砖的尺寸要求严格,另外由于砌不严,砖与砖之间接触的松紧程度不同,造成应力分布不均匀,降低炉顶的使用寿命。
发明内容
本发明目的是提供一种致密刚玉质电炉顶盖及其制备方法,解决现有的电炉顶盖热震稳定性及耐火性较差,寿命短的问题。
本发明的技术方案为:一种致密刚玉质电炉顶盖,由以下重量份的原料组成:
骨料A:致密刚玉54-58份;
骨料B:重质莫来石12-16份;
粉料:水泥 2.5-3.5份,α氧化铝粉 2.5-3.5份,碳化硅粉
7-9份,蓝晶石粉2.5-3.5份,硅微粉
0.8-1.2份,致密刚玉粉 10-14份。
进一步地,所述骨料A的重量组成如下:
0-1mm致密刚玉7份,1-3mm致密刚玉7份,3-5mm致密刚玉18份,5-8mm致密刚玉12份,8-17mm致密刚玉12份,其中0-1mm的致密刚玉不包括0 mm。
进一步地,所述骨料B的重量组成如下:
0-1mm重质莫来石6份,1-3mm重质莫来石8份,其中0-1mm的重质莫来石不包括0 mm。
进一步地,粉料重量组成为:CA-7水泥3份,α氧化铝粉 3份,碳化硅粉8份,蓝晶石粉3份,硅微粉 1份,致密刚玉粉 12份。
进一步地,粉料中致密刚玉粉的粒径小于200目。
本发明还公开了一种电弧炉顶盖的制备方法,包括如下步骤:
(1)将原料混合均匀,浇筑成型;
(2)将步骤(1)处理后的顶盖在常温养护5-7天;
(3)将步骤(2)处理后的顶盖在580-620℃烘烤6-8天即得成品。
进一步地,步骤(2)中,养护时间为6天。
进一步地,步骤(3)中,烘烤温度为600℃,烘烤时间为7天。
我们经过近几年的生产,产品经过攀钢集团长城特殊钢股份有限公司、成都冶金实验厂、都马钢厂、攀钢电冶厂等单位长期使用,不断总结经验,调整配方,使产品具有良好的抗热震性,抗侵蚀性及耐火性等,炉龄不断提高,达到了良好的使用效果。
本发明与现有技术相比具有如下优点:
1.本发明中,采用致密刚玉和重质莫来石作为骨料,以水泥及α氧化铝粉、碳化硅、蓝晶石、微硅粉和致密刚玉粉作为粉料,制备的致密刚玉质电炉顶盖具有良好的抗热震性、抗侵蚀性及耐火性,使用寿命长。
2.本发明中,致密刚玉和重质莫来石采用多种不同粒径按照科学的配方,不同粒径的骨料组成,明显能提升致密刚玉质电炉顶盖的抗热震性和抗侵蚀性。
3. 本发明中,粉料采用多种材质的粉料,蓝晶石属硅酸盐类矿物,是一种耐火度高、高温体积膨大的天然耐火原料矿物。蓝晶石分解产生体积膨胀效应对基质产生强化作用,会提高致密刚玉质电炉顶盖高温抗折强度及抗热震性,有利于保持致密刚玉质电炉顶盖在高温状态下保证体积稳定性。
具体实施方式
实施例1
一种致密刚玉质电炉顶盖,由以下重量份的原料组成:
骨料A:致密刚玉54份;
骨料B:重质莫来石16份;
粉料:水泥 2.5份,α氧化铝粉3.5份,碳化硅粉 7份,蓝晶石粉3.5份,硅微粉 0.8份,致密刚玉粉
14份,致密刚玉粉的粒径小于200目。
(1)将原料混合均匀,浇筑成型;
(2)将步骤(1)处理后的顶盖在常温养护5天;
(3)将步骤(2)处理后的顶盖在620℃烘烤6天即得成品。
实施例2
一种致密刚玉质电炉顶盖,由以下重量份的原料组成:
骨料A:致密刚玉58份;
骨料B:重质莫来石12份;
粉料:水泥 3.5份,α氧化铝粉 2.5份,碳化硅粉 9份,蓝晶石粉2.5份,硅微粉 1.2份,致密刚玉粉
10份,致密刚玉粉的粒径小于200目。
(1)将原料混合均匀,浇筑成型;
(2)将步骤(1)处理后的顶盖在常温养护7天;
(3)将步骤(2)处理后的顶盖在580℃烘烤8天即得成品。
实施例3
一种致密刚玉质电炉顶盖,由以下重量份的原料组成:
骨料A:0-1mm致密刚玉7份,1-3mm致密刚玉7份,3-5mm致密刚玉18份,5-8mm致密刚玉12份,8-17mm致密刚玉12份。
骨料B:0-1mm重质莫来石6份,1-3mm重质莫来石8份。
粉料:CA-7水泥3份,α氧化铝粉 3份,碳化硅粉8份,蓝晶石粉3份,硅微粉 1份,致密刚玉粉 12份,致密刚玉粉的粒径小于200目。
(1)将原料混合均匀,浇筑成型;
(2)将步骤(1)处理后的顶盖在常温养护6天;
(3)将步骤(2)处理后的顶盖在560℃烘烤7天即得成品。
表1:实施例3制备的致密刚玉质电炉顶盖的理化指标:
以上所述实施例仅表达了本申请的具体实施方式,其描述较为具体和详细,但并不能因此而理解为对本申请保护范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本申请技术方案构思的前提下,还可以做出若干变形和改进,这些都属于本申请的保护范围。
Claims (8)
1.一种致密刚玉质电炉顶盖,其特征在于,由以下重量份的原料组成:
骨料A:致密刚玉54-58份;
骨料B:重质莫来石12-16份;
粉料:水泥 2.5-3.5份,α氧化铝粉
2.5-3.5份,碳化硅粉 7-9份,蓝晶石粉2.5-3.5份,硅微粉 0.8-1.2份,致密刚玉粉 10-14份。
2. 根据权利要求1所述的一种致密刚玉质电炉顶盖,其特征在于,所述骨料A的重量组成如下:
0-1mm致密刚玉7份,1-3mm致密刚玉7份,3-5mm致密刚玉18份,5-8mm致密刚玉12份,8-17mm致密刚玉12份,其中0-1mm的致密刚玉不包括0 mm。
3. 根据权利要求1所述的一种致密刚玉质电炉顶盖,其特征在于,所述骨料B的重量组成如下:
0-1mm重质莫来石6份,1-3mm重质莫来石8份,其中0-1mm的重质莫来石不包括0 mm。
4. 根据权利要求1所述的一种致密刚玉质电炉顶盖,其特征在于,粉料重量组成为:水泥3份,α氧化铝粉 3份,碳化硅粉8份,蓝晶石粉3份,硅微粉 1份,致密刚玉粉 12份。
5. 根据权利要求1所述的一种致密刚玉质电炉顶盖,其特征在于,粉料中致密刚玉粉的粒径小于200目。
6. 一种根据权利要求1-5任一项所述的一种致密刚玉质电炉顶盖的制备方法,其特征在于,包括如下步骤:
(1)将原料混合均匀,浇筑成型;
(2)将步骤(1)处理后的顶盖在常温养护5-7天;
(3)将步骤(2)处理后的顶盖在580-620℃烘烤6-8天即得成品。
7. 根据权利要求6所述的一种致密刚玉质电炉顶盖的制备方法,其特征在于,步骤(2)中,养护时间为6天。
8. 根据权利要求6所述的一种致密刚玉质电炉顶盖的制备方法,其特征在于,步骤(3)中,烘烤温度为600℃,烘烤时间为7天。
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