CN114105654A - 一种大型高炉铁沟渣线喷补料及其制备方法 - Google Patents
一种大型高炉铁沟渣线喷补料及其制备方法 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 45
- 239000002893 slag Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 56
- 239000010431 corundum Substances 0.000 claims abstract description 55
- 239000000203 mixture Substances 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010426 asphalt Substances 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
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- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 16
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 16
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 39
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Abstract
本发明公开了一种大型高炉铁沟渣线喷补料,包括以下按照重量份的原料:刚玉莫来石45‑48份、低碳棕刚玉7‑14份、碳化硅7‑14份、板状刚玉1‑8份、白刚玉微粉2‑7份、中温沥青1‑2份、耐火水泥4‑10份、广西白泥1‑4份、二氧化硅微粉1‑4份、氧化铝微粉1‑4份、金属硅粉1‑4份。本发明还公开了所述大型高炉铁沟渣线喷补料的制备方法。本发明解决了修补施工复杂,不耐侵蚀等技术难题,较好的提升了产品质量,降低了企业综合成本,是一种耐侵蚀、易施工、节能型的绿色耐火材料。
Description
技术领域
本发明涉及炼铁高炉修补技术领域,具体是一种大型高炉铁沟渣线喷补料及其制备方法。
背景技术
目前,炼铁高炉淘汰落后产能,向大型化、高效化、自动化方向发展。高炉大型化后,铁水及渣的冲刷力、熔蚀增加,尤其以铁沟渣线区域的工作条件苛刻,出铁量大,流速快,导致出铁沟整个沟役的寿命降低。目前国内大型高炉铁沟较长,在使用时,铁沟的前部和后部以及撇渣器区域侵蚀不一致,造成大修浪费,因此铁沟沟役的中后期需要进行多次喷补。
传统的铁沟喷补料在喷补以后,由于使用的低档矾土质量不稳定和配比不匹配,致使通铁量不高,且需多次喷补,既影响高炉的正常运行,也造成耐火材料的浪费与使用寿命低。
发明内容
本发明的目的在于提供一种大型高炉铁沟渣线喷补料,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:
一种大型高炉铁沟渣线喷补料,包括以下按照重量份的原料:刚玉莫来石45-48份、低碳棕刚玉7-14份、碳化硅7-14份、板状刚玉1-8份、白刚玉微粉2-7份、中温沥青1-2份、耐火水泥4-10份、广西白泥1-4份、二氧化硅微粉1-4份、氧化铝微粉1-4份、金属硅粉1-4份。
作为本发明进一步的方案:包括以下按照重量份的原料:刚玉莫来石46-47份、低碳棕刚玉9-12份、碳化硅9-12份、板状刚玉3-6份、白刚玉微粉3-5份、中温沥青1.2-1.7 份、耐火水泥6-8份、广西白泥2-3份、二氧化硅微粉2-3份、氧化铝微粉2-3份、金属硅粉2-3份。
作为本发明再进一步的方案:包括以下按照重量份的原料:刚玉莫来石46份、低碳棕刚玉10份、碳化硅11份、板状刚玉5份、白刚玉微粉4份、中温沥青1.5份、耐火水泥7份、广西白泥2.5份、二氧化硅微粉2份、氧化铝微粉3份、金属硅粉2.6份。
作为本发明再进一步的方案:所述刚玉莫来石粒度为1-3mm、低碳棕刚玉粒度为0-0.5mm、碳化硅粒度为0-1mm、板状刚玉粒度为0-1mm、白刚玉微粉粒度为5μm、中温沥青粒度为0.2-1mm、耐火水泥粒度为0-0.084mm、广西白泥180目、二氧化硅微粉粒度为2 μm、氧化铝微粉粒度为2μm、金属硅粉200目。
作为本发明再进一步的方案:所述刚玉莫来石、低碳棕刚玉、广西白泥白、二氧化硅微粉和氧化铝微粉的含水量≤0.5%,所述刚玉微粉、碳化硅、板状刚玉、中温沥青和耐火水泥的含水量≤0.3%。
所述大型高炉铁沟渣线喷补料的制备方法,步骤如下:
1)将所有原料按重量份通过料斗送入混练设备中进行整体混练,控制搅拌时间为3-7 分钟,获得喷补料;
2)将步骤1)获得的喷补料进行产品包装,包装后的产品进行检验检测,合格产品入库存储,不合格产品报废处理。
与现有技术相比,本发明的有益效果是:
1、本发明利用刚玉莫来石骨料的高温稳定性、耐侵蚀,配合氧化铝微粉、二氧化硅微粉和广西白泥在高温下原位生成莫来石,保持产品高温下体积的相对稳定,以金属硅粉减弱产品在高温下的氧化程度;
2、一次喷补后通铁量可增加6万吨,耐火材料的单位消耗降低,解决了大型高炉出铁沟较长,造成使用时前部、后部的侵蚀速度不一致,造成大修浪费的问题,喷补料的应用使得大高炉铁沟沟役寿命延长;
3、解决了修补施工复杂,不耐侵蚀等技术难题,较好的提升了产品质量,降低了企业综合成本,是一种耐侵蚀、易施工、节能型的绿色耐火材料。
附图说明
图1为大型高炉铁沟渣线喷补料使用部位说明示意图。
图2为大型高炉铁沟渣线喷补料制备工艺示意图。
具体实施方式
下面将结合本发明实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
一种大型高炉铁沟渣线喷补料,包括以下按照重量份的原料:刚玉莫来石45份、低碳棕刚玉7份、碳化硅7份、板状刚玉1份、白刚玉微粉2份、中温沥青1份、耐火水泥 4份、广西白泥1份、二氧化硅微粉1份、氧化铝微粉1份、金属硅粉1份。
本实施例中,所述大型高炉铁沟渣线喷补料的制备方法,步骤如下:
1)将所有原料按重量份通过料斗送入混练设备中进行整体混练,控制搅拌时间为3 分钟,获得喷补料;
2)将步骤1)获得的喷补料进行产品包装,包装后的产品进行检验检测,合格产品入库存储,不合格产品报废处理。
实施例2
一种大型高炉铁沟渣线喷补料,包括以下按照重量份的原料:刚玉莫来石46份、低碳棕刚玉9份、碳化硅9份、板状刚玉3份、白刚玉微粉3份、中温沥青1.7份、耐火水泥8份、广西白泥3份、二氧化硅微粉3份、氧化铝微粉3份、金属硅粉3份。
本实施例中,所述大型高炉铁沟渣线喷补料的制备方法,步骤如下:
1)将所有原料按重量份通过料斗送入混练设备中进行整体混练,控制搅拌时间为5 分钟,获得喷补料;
2)将步骤1)获得的喷补料进行产品包装,包装后的产品进行检验检测,合格产品入库存储,不合格产品报废处理。
实施例3
一种大型高炉铁沟渣线喷补料,包括以下按照重量份的原料:刚玉莫来石46份、低碳棕刚玉10份、碳化硅11份、板状刚玉5份、白刚玉微粉4份、中温沥青1.5份、耐火水泥7份、广西白泥2.5份、二氧化硅微粉2份、氧化铝微粉3份、金属硅粉2.6份。
本实施例中,所述大型高炉铁沟渣线喷补料的制备方法,步骤如下:
1)将所有原料按重量份通过料斗送入混练设备中进行整体混练,控制搅拌时间为5 分钟,获得喷补料;
2)将步骤1)获得的喷补料进行产品包装,包装后的产品进行检验检测,合格产品入库存储,不合格产品报废处理。
实施例4
一种大型高炉铁沟渣线喷补料,包括以下按照重量份的原料:刚玉莫来石47份、低碳棕刚玉12份、碳化硅12份、板状刚玉6份、白刚玉微粉5份、中温沥青1.2份、耐火水泥6份、广西白泥2份、二氧化硅微粉2份、氧化铝微粉2份、金属硅粉2份。
本实施例中,所述大型高炉铁沟渣线喷补料的制备方法,步骤如下:
1)将所有原料按重量份通过料斗送入混练设备中进行整体混练,控制搅拌时间为5 分钟,获得喷补料;
2)将步骤1)获得的喷补料进行产品包装,包装后的产品进行检验检测,合格产品入库存储,不合格产品报废处理。
实施例5
一种大型高炉铁沟渣线喷补料,包括以下按照重量份的原料:刚玉莫来石48份、低碳棕刚玉14份、碳化硅14份、板状刚玉8份、白刚玉微粉7份、中温沥青2份、耐火水泥10份、广西白泥4份、二氧化硅微粉4份、氧化铝微粉4份、金属硅粉4份。
本实施例中,所述大型高炉铁沟渣线喷补料的制备方法,步骤如下:
1)将所有原料按重量份通过料斗送入混练设备中进行整体混练,控制搅拌时间为7 分钟,获得喷补料;
2)将步骤1)获得的喷补料进行产品包装,包装后的产品进行检验检测,合格产品入库存储,不合格产品报废处理。
大高炉铁沟渣线喷补料主要使用于下图1中使用部位,使用条件苛刻,使用温度1550℃,使用过程中要求耐急冷急热,耐侵蚀,高温体积稳定,易施工易维护等。
本专利利用刚玉莫来石骨料的高温稳定性、耐侵蚀,配合氧化铝微粉、二氧化硅微粉和广西白泥在高温下原位生成莫来石,保持产品高温下体积的相对稳定,以金属硅粉减弱产品在高温下的氧化程度。
针对不同实施例进行微调试验,对产品进行检测,关键参数可达到如表1所示的标准:
表1
检测项目 | 本发明指标 | 市场指标 |
Al<sub>2</sub>O<sub>3</sub>(%) | ≥75 | ≥60 |
1550℃×3h线变化率(%) | ≤-0.12 | 0~-1.5 |
1550℃×3h耐压强度(MPa) | 25 | 20 |
1550℃×3h抗折强度(MPa) | 10 | 6 |
1550℃×3h渣蚀(mm) | 3 | 5 |
对现场施工试验进行总结完善,本发明制备方法关键在于骨料、微粉、细粉部分的精确配比和混练。通过选择自动化配料设备、混练设备,确保产品配比精确、各物料充分搅拌均匀,主要控制搅拌时间达到3~7分钟,保证微量原料等材料的充分混匀,从而确保产品的制备质量。
本发明主要针对高炉铁沟渣线部位的损毁情况;基于损毁机制,研制的渣线喷补料性能主要体现在以下方面:良好的抗熔渣的渗透性能;良好的高温体积稳定性和抗热震性;可快速的进行喷补施工,优良的烧结性能。喷补料的关键技术是解决物料在高温下自反应烧结而获得高温强度和体积稳定。
经试验表明,相较于市场产品,本发明喷补料一次喷补后通铁量可增加6万吨,耐火材料的单位消耗降低,解决了大型高炉出铁沟较长,造成使用时前部、后部的侵蚀速度不一致,造成大修浪费问题,喷补料的应用使得大高炉铁沟沟役寿命延长;解决了修补施工复杂,不耐侵蚀等技术难题,较好的提升了产品质量,降低了企业综合成本,是一种耐侵蚀、易施工、节能型的绿色耐火材料。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。
Claims (6)
1.一种大型高炉铁沟渣线喷补料,其特征在于,包括以下按照重量份的原料:刚玉莫来石45-48份、低碳棕刚玉7-14份、碳化硅7-14份、板状刚玉1-8份、白刚玉微粉2-7份、中温沥青1-2份、耐火水泥4-10份、广西白泥1-4份、二氧化硅微粉1-4份、氧化铝微粉1-4份、金属硅粉1-4份。
2.根据权利要求1所述的大型高炉铁沟渣线喷补料,其特征在于,包括以下按照重量份的原料:刚玉莫来石46-47份、低碳棕刚玉9-12份、碳化硅9-12份、板状刚玉3-6份、白刚玉微粉3-5份、中温沥青1.2-1.7份、耐火水泥6-8份、广西白泥2-3份、二氧化硅微粉2-3份、氧化铝微粉2-3份、金属硅粉2-3份。
3.根据权利要求2所述的大型高炉铁沟渣线喷补料,其特征在于,包括以下按照重量份的原料:刚玉莫来石46份、低碳棕刚玉10份、碳化硅11份、板状刚玉5份、白刚玉微粉4份、中温沥青1.5份、耐火水泥7份、广西白泥2.5份、二氧化硅微粉2份、氧化铝微粉3份、金属硅粉2.6份。
4.根据权利要求1所述的大型高炉铁沟渣线喷补料,其特征在于,所述刚玉莫来石粒度为1-3mm、低碳棕刚玉粒度为0-0.5mm、碳化硅粒度为0-1mm、板状刚玉粒度为0-1mm、白刚玉微粉粒度为5μm、中温沥青粒度为0.2-1mm、耐火水泥粒度为0-0.084mm、广西白泥180目、二氧化硅微粉粒度为2μm、氧化铝微粉粒度为2μm、金属硅粉200目。
5.根据权利要求4所述的大型高炉铁沟渣线喷补料,其特征在于,所述刚玉莫来石、低碳棕刚玉、广西白泥白、二氧化硅微粉和氧化铝微粉的含水量≤0.5%,所述刚玉微粉、碳化硅、板状刚玉、中温沥青和耐火水泥的含水量≤0.3%。
6.一种如权利要求1-5任一所述的大型高炉铁沟渣线喷补料的制备方法,其特征在于,包括以下步骤:
1)将所有原料按重量份通过料斗送入混练设备中进行整体混练,控制搅拌时间为3-7分钟,获得喷补料;
2)将步骤1)获得的喷补料进行产品包装,包装后的产品进行检验检测,合格产品入库存储,不合格产品报废处理。
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