CN111439990A - 高钛型高炉渣高温碳化电炉用镁铝碳质喷补料及制备方法 - Google Patents
高钛型高炉渣高温碳化电炉用镁铝碳质喷补料及制备方法 Download PDFInfo
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- -1 Magnesium-aluminum-carbon Chemical compound 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 45
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 45
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 45
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 45
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- 238000002844 melting Methods 0.000 claims abstract description 12
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- 239000010431 corundum Substances 0.000 claims abstract description 11
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 11
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 11
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 11
- 239000000440 bentonite Substances 0.000 claims abstract description 10
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 10
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 229910001051 Magnalium Inorganic materials 0.000 claims abstract description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 13
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 230000000274 adsorptive effect Effects 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
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- 238000010998 test method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
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- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明涉及一种高钛型高炉渣高温碳化电炉用镁铝碳质喷补料及制备方法，镁铝碳质喷补料由如下原料按重量份混合制成：高纯镁砂颗粒50～70份，高纯镁砂细粉15～25份，电熔棕刚玉超细粉5～15份，环保型碳粉1.5～5份，膨润土1～5份，六偏磷酸钠1～3份，木质素磺酸钙0.5～1份；所述镁铝碳质喷补料的熔点≥1200℃，耐火修补层致密度≥2.97g/cm3，附着率≥95％。本发明在原料中引入铝源使化学结合后的内部晶向发生改变，提高了喷补料的熔点，所制备的喷补料具有高温强度大，耐用性好的特点，喷补料形成的耐火修补层致密度高，粘结性强；大幅度提高了生产运行效率，实现电炉高效化、长寿化。
Description
技术领域
本发明涉及耐火材料技术领域，尤其涉及一种高钛型高炉渣高温碳化电炉用镁铝碳质喷补料及制备方法。
背景技术
随着我国炼钢技术的快速发展，为了提高生产效率，同时满足高纯度、高清洁度钢的质量要求，钢水的二次精炼处理率也大幅增加，导致出钢温度提高、钢水滞留时间延长。工作条件的苛刻造成内衬耐火材料的损毁不断扩大，尤其是存在不均衡蚀损。
目前，对于耐火材料内衬的主要修补方法可分为两种，一种方法是拆包修补，即将蚀损到一定程度的渣线砖全部拆除，用新砖重新砌筑内衬渣线部位。另一种方法是喷补料修补，即直接使用机械方法将耐火材料喷补在内衬表面。与前者相比，内衬喷补可在热态下进行，不需专门烧结，短时间内即可加料继续生产，能大幅提高炼钢炉作业率，减少停炉维修时间。
实践证明，喷补料修复是提高电炉内衬耐火材料使用寿命、降低成本、减轻工人劳动强度的一种有效手段。目前，国内多采用氧化镁含量大于85％，SiO2含量为4％～8％的碱性复合材料作为喷补料的基础材料，但此种材料的熔点很低，因此大大降低了喷补料的高温性能、致密度和耐压强度。因此，亟待研究一种适用于碳化电炉的致密度高、耐压强度大、喷补效率高的喷补料。
发明内容
本发明提供了一种高钛型高炉渣高温碳化电炉用镁铝碳质喷补料及制备方法，在原料中引入铝源使化学结合后的内部晶向发生改变，从而将喷补料的熔点提高到1200℃以上；并且所制备的喷补料具有高温强度大，耐用性好的特点，能够完全替代镁含量85％的喷补料使用，喷补料形成的耐火修补层致密度高，粘结性强；大幅度提高了生产运行效率，实现电炉高效化、长寿化。
为了达到上述目的，本发明采用以下技术方案实现：
高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，其由如下原料按重量份混合制成：高纯镁砂颗粒50～70份，高纯镁砂细粉15～25份，电熔棕刚玉超细粉5～15份，环保型碳粉1.5～5份，膨润土1～5份，六偏磷酸钠1～3份，木质素磺酸钙0.5～1份；所述镁铝碳质喷补料的熔点≥1200℃，耐火修补层致密度≥2.97g/cm3，附着率≥95％。
所述高纯镁砂颗粒的粒度为0～2.5mm。
所述高纯镁砂细粉的粒度为200目。
所述环保型碳粉为吸附性纳米碳粉，粒度小于0.074mm。
所述电熔棕刚玉超细粉的粒度小于10μm。
高钛型高炉渣高温碳化电炉用镁铝碳质喷补料的制备方法，包括如下步骤：
步骤一，以高纯镁砂为原料，经破碎制成粒度为0～2.5mm的高纯镁砂颗粒；
步骤二，以高纯镁砂为原料，经破碎、细磨制成200目的高纯镁砂细粉；
步骤三，按照配比，将高纯镁砂颗粒、高纯镁砂细粉、电熔棕刚玉超细粉、环保型碳粉、膨润土、六偏磷酸钠和木质素磺酸钙一同置入搅拌机中，混合10～30min，即得高钛型高炉渣高温碳化电炉用镁铝碳质喷补料。
与现有技术相比，本发明的有益效果是：
1)本发明制备的镁铝碳质喷补料，在各原料和结合剂共同配合作用下，达到耐火修补层致密度≥2.97g/cm3、附着率≥95％；
2)本发明制备的镁铝碳质喷补料，用普通喷补机通过半干法(掺水量15％～20％)喷补在高钛型高炉渣高温碳化电炉内衬渣线、风口等易损部位，喷补质量良好，单次喷补使用炉数大于8炉；
3)本发明制备的镁铝碳质喷补料，可在温度≥1200℃条件下对渣线、风口区域出现的过快熔损部位进行抢修喷补，喷补料附着率≥95％，喷补时间≤15min，烧结时间≤8min；
4)传统喷补料在喷补过程中，容易由于喷补时间过长导致喷嘴堵塞；本发明引入适量六偏磷酸钠及木质素磺酸钙作为缓凝剂，加强喷颈内泥料流动性，缩短喷补时间的同时，也减少了器械损坏几率和原料的损耗；与此同时，由于本发明制备的喷补料流动性相对较好，在喷补过程中会形成均匀且致密的喷补层，大大提升了喷补区域的使用寿命；
5)本发明所制备的喷补料经中钢集团洛阳耐火材料研究院质检中心检测，高温回转抗渣模拟实验炉1650℃温度下进行磨损试验，连续10小时高温磨损量小于1mm。
附图说明
图1是本发明所述镁铝碳质喷补料制备方法的工艺流程图。
具体实施方式
下面结合附图对本发明的具体实施方式作进一步说明：
本发明所述一种高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，其由如下原料按重量份混合制成：高纯镁砂颗粒50～70份，高纯镁砂细粉15～25份，电熔棕刚玉超细粉5～15份，环保型碳粉1.5～5份，膨润土1～5份，六偏磷酸钠1～3份，木质素磺酸钙0.5～1份；所述镁铝碳质喷补料的熔点≥1200℃，耐火修补层致密度≥2.97g/cm3，附着率≥95％。
所述高纯镁砂颗粒的粒度为0～2.5mm。
所述高纯镁砂细粉的粒度为200目。
所述环保型碳粉为吸附性纳米碳粉，粒度小于0.074mm。
所述电熔棕刚玉超细粉的粒度小于10μm。
如图1所示，本发明所述高钛型高炉渣高温碳化电炉用镁铝碳质喷补料的制备方法，包括如下步骤：
步骤一，以高纯镁砂为原料，经破碎制成粒度为0～2.5mm的高纯镁砂颗粒；
步骤二，以高纯镁砂为原料，经破碎、细磨制成200目的高纯镁砂细粉；
步骤三，按照配比，将高纯镁砂颗粒、高纯镁砂细粉、电熔棕刚玉超细粉、环保型碳粉、膨润土、六偏磷酸钠和木质素磺酸钙一同置入搅拌机中，混合10～30min，即得高钛型高炉渣高温碳化电炉用镁铝碳质喷补料。
以下实施例在以本发明技术方案为前提下进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于下述的实施例。下述实施例中所用方法如无特别说明均为常规方法。
【实施例1】
本实施例中，将高纯镁砂破碎成粒度为0～2.5mm(0≤粒度≤2.5mm)的颗粒，得到高纯镁砂颗粒；将一部分高纯镁砂再细磨成200目的细粉，得到高纯镁砂细粉；取上述高纯镁砂颗粒63kg、高纯镁砂细粉20kg与10kg电熔棕刚玉超细粉、1.5kg环保型碳粉、2kg膨润土、3kg六偏磷酸钠和0.5kg木质素磺酸钙一同置入搅拌机中，混合30min，即得高钛型高炉渣高温碳化电炉用镁铝碳质喷补料。
按GB/T 2997-2000《致密定型耐火制品体积密度、显气孔率和真气孔率试验方法》测试样品的体积密度；按GB/T 5072-2008《耐火材料常温耐压强度试验方法》测试样品的耐压强度；按GB/T 8932.5-1988《致密耐火浇注料线变化率试验方法》测试样品的线变化率。
测试结果：本实施例制备的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，110℃下体积密度为2.96g/cm3，耐压强度为103MPa；1600℃下体积密度为2.97g/cm3，耐压强度为104MPa，线变化率为±0.12，单次喷补使用炉数为9炉。
【实施例2】
本实施例中，将高纯镁砂破碎成粒度为0～2.5mm的颗粒，得到高纯镁砂颗粒；将一部分高纯镁砂颗粒细磨成200目的细粉，得到高纯镁砂细粉；取上述高纯镁砂颗粒60kg、高纯镁砂细粉20kg，与10kg电熔棕刚玉超细粉、3kg环保型碳粉、3kg膨润土、3kg六偏磷酸钠和1kg木质素磺酸钙一同置入搅拌机中，混合30min，即得高钛型高炉渣高温碳化电炉用镁铝碳质喷补料。
按GB/T 2997-2000《致密定型耐火制品体积密度、显气孔率和真气孔率试验方法》测试样品的体积密度；按GB/T 5072-2008《耐火材料常温耐压强度试验方法》测试样品的耐压强度；按GB/T 8932.5-1988《致密耐火浇注料线变化率试验方法》测试样品的线变化率。
本实施例制备的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，110℃下体积密度为2.95g/cm3，耐压强度为99MPa；1600℃下体积密度为2.98g/cm3，耐压强度为101MPa，线变化率为±0.15，单次喷补使用炉数为8炉。
【实施例3】
本实施例中，将高纯镁砂破碎成粒度为0～2.5mm的颗粒，得高纯镁砂颗粒；将一部分高纯镁砂颗粒细磨成200目的细粉，得到高纯镁砂细粉；取上述高纯镁砂颗粒65kg、高纯镁砂细粉19kg，与9kg电熔棕刚玉超细粉、1.5kg环保型碳粉、2kg膨润土、3kg六偏磷酸钠和0.5kg木质素磺酸钙一同置入搅拌机中，混合30min，即得高钛型高炉渣高温碳化电炉用镁铝碳质喷补料。
按GB/T 2997-2000《致密定型耐火制品体积密度、显气孔率和真气孔率试验方法》测试样品的体积密度；按GB/T 5072-2008《耐火材料常温耐压强度试验方法》测试样品的耐压强度；按GB/T 8932.5-1988《致密耐火浇注料线变化率试验方法》测试样品的线变化率。
本实施例制备的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，110℃下体积密度为2.96g/cm3，耐压强度为102MPa；1600℃下体积密度为2.97g/cm3，耐压强度为104MPa，线变化率为±0.14，单次喷补使用炉数为8炉。
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 (6)
1.高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，其特征在于，其由如下原料按重量份混合制成：高纯镁砂颗粒50～70份，高纯镁砂细粉15～25份，电熔棕刚玉超细粉5～15份，环保型碳粉1.5～5份，膨润土1～5份，六偏磷酸钠1～3份，木质素磺酸钙0.5～1份；所述镁铝碳质喷补料的熔点≥1200℃，耐火修补层致密度≥2.97g/cm3，附着率≥95％。
2.根据权利要求1所述的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，其特征在于，所述高纯镁砂颗粒的粒度为0～2.5mm。
3.根据权利要求1所述的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，其特征在于，所述高纯镁砂细粉的粒度为200目。
4.根据权利要求1所述的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，其特征在于，所述环保型碳粉为吸附性纳米碳粉，粒度小于0.074mm。
5.根据权利要求1所述的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料，其特征在于，所述电熔棕刚玉超细粉的粒度小于10μm。
6.如权利要求1～5任意一种所述的高钛型高炉渣高温碳化电炉用镁铝碳质喷补料的制备方法，其特征在于，包括如下步骤：
步骤一，以高纯镁砂为原料，经破碎制成粒度为0～2.5mm的高纯镁砂颗粒；
步骤二，以高纯镁砂为原料，经破碎、细磨制成200目的高纯镁砂细粉；
步骤三，按照配比，将高纯镁砂颗粒、高纯镁砂细粉、电熔棕刚玉超细粉、环保型碳粉、膨润土、六偏磷酸钠和木质素磺酸钙一同置入搅拌机中，混合10～30min，即得高钛型高炉渣高温碳化电炉用镁铝碳质喷补料。
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