CN110451934A - 一种转炉大面修补料 - Google Patents
一种转炉大面修补料 Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 45
- 230000008439 repair process Effects 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 48
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 26
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 26
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 26
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
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- 239000002994 raw material Substances 0.000 claims abstract description 14
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 7
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- 229910052749 magnesium Inorganic materials 0.000 claims description 6
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- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
本发明提出了一种转炉大面修补料，由下述重量份的原料制成：电熔镁砂骨料50～80份，电熔镁砂细粉20～40份，二氧化硅微粉3～6份，黏土粉1～3份，碳化硅微粉2～4份，减水剂0.2～0.3份以及添加剂2～4份。本发明的有益效果如下：通过深入分析转炉大面损毁机理，采取合理的颗粒级配及合理的镁质减水剂选择，使得制备出的转炉大面修补料具有加水量小、自流性能好，高温收缩小，烧结时间短，强度高，抗冲刷和耐化学侵蚀性强的优良特性；同时制备原料中不含碳，通过加水搅拌后直接倒在转炉修补面即可进行施工，烧结过程中不产生有害烟气，对环境无污染；且使用寿命长，经济效益高。解决了传统大面料烧结时间长、使用寿命低、修补频繁、污染环境的问题。
Description
技术领域
本发明涉及转炉修补料制备技术领域，特别是指一种转炉大面修补料。
背景技术
转炉冶炼采用溅渣护炉技术后，炉衬寿命大幅度提高，但是由于转炉前大面同时承受着铁水和废钢的机械冲击作用、钢水和炉渣的冲刷以及化学侵蚀作用，导致转炉大面位置耐材损毁严重，成为转炉安全隐患和使用寿命低的短板。
因此转炉大面修补是提高安全性和转炉寿命的重要手段。传统转炉修补料主要采用焦油、沥青、汽油、煤油等结合剂和助烧剂，材料用量大、成本高，制备过程劳动强度大，且会产生大量有毒有害气体，污染环境。之后经过不断探索，人们研究出了采用无机结合剂和水系自流料来制备修补料，虽能改善作业环境，但水系自流料成本高，综合效益仍然较差。
发明内容
本发明提出一种转炉大面修补料，解决了现有技术中传统大面料烧结时间长、使用寿命低、修补频繁、污染环境的问题。
本发明的技术方案是这样实现的：
一种转炉大面修补料，由下述重量份的原料制成：电熔镁砂骨料50～80份，电熔镁砂细粉20～40份，二氧化硅微粉3～6份，黏土粉1～3份，碳化硅微粉2～4份，减水剂0.2～0.3份以及添加剂2～4份；所述添加剂为铬矿颗粒、氧化铬细粉或镁铝尖晶石细粉。
作为优选，所述电熔镁砂骨料中的氧化镁含量不小于90％，所述电熔镁砂细粉中的氧化镁含量不小于94％，所述二氧化硅微粉中的二氧化硅含量不小于94％。
作为优选，所述黏土粉为广西白泥，其氧化铝含量不小于32％。
作为优选，所述电熔镁砂骨料的粒径不大于5毫米，所述电熔镁砂细粉的粒径大小为200目或300目；所述黏土粉的粒径不大于200目。
作为优选，所述碳化硅微粉的粒径大小为200目或300目，其中碳化硅含量不小于97％。
上述减水剂采用索尔维(重庆)化工产品有限公司生产的品名为高效减水剂、规格型号为MG800的减水剂，其主要采用C，H，O为主的有机化合物复合而成，通过分子材料的特殊作用在材料里达到高效减水的效果，提高材料自流性能、降低加水量。
上述制备原料中的二氧化硅微粉能够起到抑制电熔镁砂水化的作用；黏土粉作为结合剂和烧结助剂，有助于修补料在高温下快速产生强度，并提高高温烧结强度。
上述制备原料中的碳化硅微粉，一方面有助于提高高温抗折强度；另一方面，碳化硅热导率高，热震稳定性好，能够防止大面料剥落起皮；但是当碳化硅粒径太粗时不利于分散均匀，太细时影响加水量和施工性能，因此本发明采用两种不同粒径的碳化硅微粉配合达到最佳效果。
上述制备原料中的添加剂采用铬矿颗粒或氧化铬细粉，其能在高温下与钢渣发生固相反应，提高耐材的强度和致密度，从而提高转炉耐材的抗冲刷抗侵蚀性能。添加剂采用镁铝尖晶石，其本身抗侵蚀，同时高温下能与钢渣固溶形成致密层，防止钢渣渗透和侵蚀耐材。
本发明的有益效果为：
本发明通过深入分析转炉大面损毁机理，采取合理的颗粒级配及合理的镁质减水剂选择，使得制备出的转炉大面修补料具有加水量小，自流性能好，高温收缩小，烧结时间短，强度高，抗冲刷和耐化学侵蚀性强的优良特性；同时制备原料中不含碳，通过加水搅拌后直接倒在转炉修补面即可进行施工，烧结过程中不产生有害烟气，对环境无污染；且使用寿命长，经济效益高。解决了传统大面料烧结时间长、使用寿命低、修补频繁、污染环境、对人体有害的问题。
具体实施方式
下面将结合本发明实施例中，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作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
一种转炉大面修补料，由下述重量份的原料制成：粒径为5～3毫米的电熔镁砂骨料6份，粒径为3～1毫米的电熔镁砂骨料28份，粒径为1～0毫米的电熔镁砂骨料16份，粒径为200目的电熔镁砂细粉20份，二氧化硅微粉3份，广西白泥1份，粒径为200目的碳化硅微粉1份，粒径为300目的碳化硅微粉1份，粒径为20目的铬矿颗粒1份，粒径为80目的铬矿细粉1份以及减水剂0.2份。
上述减水剂采用索尔维(重庆)化工产品有限公司生产的品名为高效减水剂、规格型号为MG800的减水剂，其主要采用C，H，O为主的有机化合物复合而成，通过分子材料的特殊作用在材料里达到高效减水的效果，提高材料自流性能、降低加水量。
经过试验，采用上述原料制备出的转炉大面修补料能够达到以下性能：加水量约为7％，自流值可达到120以上；可在1100℃条件下经过20分钟快速烧结，烧后强度可达35Mpa以上；在1500℃条件下，高温抗折强度可达3Mpa以上。
实施例2
一种转炉大面修补料，由下述重量份的原料制成：粒径为5～3毫米的电熔镁砂骨料10份，粒径为3～1毫米的电熔镁砂骨料35份，粒径为1～0毫米的电熔镁砂骨料20份，粒径为300目的电熔镁砂细粉30份，二氧化硅微粉4.5份，广西白泥2份，粒径为200目的碳化硅微粉1.5份，粒径为300目的碳化硅微粉1.5份，粒径为320目的氧化铬细粉3份以及减水剂0.25份。
上述减水剂采用索尔维(重庆)化工产品有限公司生产的品名为高效减水剂、规格型号为MG800的减水剂，其主要采用C，H，O为主的有机化合物复合而成，通过分子材料的特殊作用在材料里达到高效减水的效果，提高材料自流性能、降低加水量。
经过试验，采用上述原料制备出的转炉大面修补料能够达到以下性能：加水量约为7％，自流值可达到120以上；可在1100℃条件下经过20分钟快速烧结，烧后强度可达35Mpa以上；在1500℃条件下，高温抗折强度可达3Mpa以上。
实施例3
一种转炉大面修补料，由下述重量份的原料制成：粒径为5～3毫米的电熔镁砂骨料12份，粒径为3～1毫米的电熔镁砂骨料44份，粒径为1～0毫米的电熔镁砂骨料24份，粒径为200目的电熔镁砂细粉40份，二氧化硅微粉6份，广西白泥3份，粒径为200目的碳化硅微粉2份，粒径为300目的碳化硅微粉2份，粒径为320目的镁铝尖晶石细粉4份以及减水剂0.2份。
上述减水剂采用索尔维(重庆)化工产品有限公司生产的品名为高效减水剂、规格型号为MG800的减水剂，其主要采用C，H，O为主的有机化合物复合而成，通过分子材料的特殊作用在材料里达到高效减水的效果，提高材料自流性能、降低加水量。
经过试验，采用上述原料制备出的转炉大面修补料能够达到以下性能：加水量约为7％，自流值可达到120以上；可在1100℃条件下经过20分钟快速烧结，烧后强度可达35Mpa以上；在1500℃条件下，高温抗折强度可达3Mpa以上。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
Claims (5)
1.一种转炉大面修补料，其特征在于，由下述重量份的原料制成：电熔镁砂骨料50～80份，电熔镁砂细粉20～40份，二氧化硅微粉3～6份，黏土粉1～3份，碳化硅微粉2～4份，减水剂0.2～0.3份以及添加剂2～4份；所述添加剂为铬矿颗粒、氧化铬细粉或镁铝尖晶石细粉。
2.根据权利要求1所述的一种转炉大面修补料，其特征在于，所述电熔镁砂骨料中的氧化镁含量不小于90％，所述电熔镁砂细粉中的氧化镁含量不小于94％，所述二氧化硅微粉中的二氧化硅含量不小于94％。
3.根据权利要求1所述的一种转炉大面修补料，其特征在于，所述黏土粉为广西白泥，其氧化铝含量不小于32％。
4.根据权利要求1所述的一种转炉大面修补料，其特征在于，所述电熔镁砂骨料的粒径不大于5毫米，所述电熔镁砂细粉的粒径大小为200目或300目；所述黏土粉的粒径不大于200目。
5.根据权利要求1所述的一种转炉大面修补料，其特征在于，所述碳化硅微粉的粒径大小为200目或300目，其中碳化硅含量不小于97％。
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