CN112960974B - 无碳钢包工作衬用刚玉尖晶石质修补料及其制备方法 - Google Patents
无碳钢包工作衬用刚玉尖晶石质修补料及其制备方法 Download PDFInfo
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- 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 14
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- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明公开了一种无碳钢包工作衬用刚玉尖晶石质修补料及其制备方法,该修补料按质量份数计包括如下组分:刚玉复合料30~80份、铝镁尖晶石15~45份、氧化铝微粉2~10份、纯铝酸钙水泥3~8份、增塑剂1~7份、减水剂0.1~0.3份、防爆纤维0.03~0.3份。本发明的无碳钢包工作衬用刚玉尖晶石质修补料具有良好的粘附性能、适当的铺展性能,中高温强度高、整体性能好,抗冲刷、抗侵蚀性能优良,使用寿命长,节约资源、降低碳排放。
Description
技术领域
本发明涉及钢包工作衬用修补料的技术领域,具体涉及一种无碳钢包工作衬用刚玉尖晶石质修补料及其制备方法。
背景技术
随着冶金技术特别是炉外精炼技术的发展,钢包的使用条件越来越苛刻,精炼时间的延长直接影响钢包使用寿命。尤其是无碳工作衬砖与镁碳渣线砖结合部位,由于材料热膨胀性能不一致导致该部位出现裂纹,经过钢水与渣的冲刷、侵蚀后变成凹槽,成为制约钢包寿命延长的瓶颈。无论是钢厂还是耐材承包商从提高产能产值的角度出发,又要求钢包长寿化、加快钢包周转,为解决此问题,钢包包壁冷态修补和热态喷补技术应运而生。
目前,国内使用的钢包包壁热态喷补由于受喷补施工条件和烧结时间等因素限制,使用寿命较低。而冷态修补时,修补料的附着性较差,有的附着性能不稳定,易坠落下滑,而且在用锹抛投时反弹率高,有的烘烤后局部易脱落,对修补料及包衬使用寿命影响较大。
发明内容
本发明的目的在于克服上述背景技术的不足,提供一种无碳钢包工作衬用刚玉尖晶石质修补料及其制备方法,该修补料具有良好的粘附性能、适当的铺展性能,中高温强度高、整体性能好,抗冲刷、抗侵蚀性能优良,使用寿命长,节约资源、降低碳排放。
为实现上述目的,本发明提供的一种无碳钢包工作衬用刚玉尖晶石质修补料,它按质量份数计包括如下组分:
进一步地,所述的无碳钢包工作衬用刚玉尖晶石质修补料,它按质量份数计包括如下组分:
进一步地,所述刚玉复合料中Al2O3质量百分含量≥85%;其中,1mm<粒度≤3mm的刚玉复合料占刚玉复合料总质量的50~70%,0.088mm<粒度≤1mm的刚玉复合料占刚玉复合料总质量的20~30%,粒度≤0.088mm的刚玉复合料占刚玉复合料总质量的0~30%。粒度>3mm时会影响施工性能,导致施工质量变差。上述粒度范围为最佳范围,各个粒度刚玉复合料的重量百分比超出上述范围会直接影响修补料的粒度级配,进而影响产品的施工性能和使用性能。
进一步地,所述铝镁尖晶石中Al2O3质量百分含量为72~78%;其中,0.088mmmm<粒度≤1mm的铝镁尖晶石占铝镁尖晶石总质量的30~70%,粒度≤0.088mm的铝镁尖晶石占铝镁尖晶石总质量的30~70%。粒度>1mm时会影响产品的性价比和再生资源的使用,述粒度范围为最佳范围,各个粒度铝镁尖晶石的重量百分比超出上述范围会直接影响修补料的粒度级配和抗渣侵蚀性能,进而影响产品的施工质量和使用寿命。
进一步地,所述氧化铝微粉中Al2O3质量百分含量≥99%,所述氧化铝微粉粒度为0.5~3μm。粒度分布呈双峰状态,能够有效提高修补料的烧结性能和致密度,从而提高修补料中高温强度和抗冲刷性能。
进一步地,所述纯铝酸钙水泥中Al2O3质量百分含量≥70%,所述纯铝酸钙水泥粒度为≤0.088mm。纯铝酸钙水泥的粒度和Al2O3的含量能保证该修补料的常温强度,有效提高其施工性能和使用寿命。铝酸钙水泥和氧化铝微粉在修补料使用的过程中能生成不同铝酸钙产物,增加修补料的强度和抗渣侵蚀性能。
进一步地,增塑剂为一种无机材料,专门针对铝酸盐水泥结合手工或机械涂抹料的专用辅助剂,能够显著优化和改善涂抹料的粘附性、塑性,抗流淌、抗塌落效果较好,有效提高修补料的施工性能,提升施工效率、降低劳动强度。
进一步地,所述减水剂为磷酸盐和/或偏磷酸盐,有助于减少修补料施工加水量,增加基质分散性,保证修补料适当的铺展性能,提高修补料的施工性能和使用性能。
再进一步地,所述防爆纤维的以聚丙烯为原材料制成,其软化点为102~105℃,收缩熔化后形成气孔并碳化,在修补料内分布形成微小网络气孔,在修补料烘烤过程中能打开水气通道,减轻内部应力,防止爆裂,提高修补料的使用寿命。
本发明还提供一种上述的无碳钢包工作衬用刚玉尖晶石质修补料的制备方法,包括如下步骤:
1)按照组分配方进行配料,先将粒度≤0.088mm的刚玉复合料、粒度≤0.088mm的铝镁尖晶石、氧化铝微粉、纯铝酸钙水泥、增塑剂和减水剂、防爆纤维进行均混,再将均混后的物料加入粒度>0.088mm的刚玉复合料、粒度>0.088mm的铝镁尖晶石中搅拌混合均匀,得到混合料;
2)向步骤1)的混合料中外加8.0~9.0%的水,搅拌5~8分钟至均匀状态,养生2~4小时后随钢包进行烘烤。
更进一步地,所述步骤1)中,均混的时间为2~3分钟,搅拌的时间为3~5分钟。
与现有技术相比,本发明具有如下优点:
其一,本发明的修补料由于加入刚玉复合料,有利于合理利用和保护铝矾土资源,节约所替代原料生产过程中的能耗、降低碳排放;刚玉复合料的再生和利用响应了国家、地方环保政策和要求,对企业制定“固废不出厂”有效措施提供了较好的支持,具有较高的社会效益和经济效益。
其二,本发明的修补料由于采用铝酸钙水泥和氧化铝微粉作复合结合剂,具有良好的施工性能和中高温强度,整体性能好,抗冲刷性能优良;同时,由于加入铝镁尖晶石,以及铝酸钙水泥和氧化铝微粉在修补料使用的过程中能生成不同铝酸钙产物,增加修补料的强度和抗渣侵蚀性能,能有效提高钢包工作衬的使用寿命。
其三,本发明的修补料由于加入增塑剂、减水剂和防爆纤维,具有良好的粘附性能和适当的铺展性能,抗流淌、抗塌落效果好,有效提高了修补料的施工性能和烘烤过程中的防爆性能,有利于增加钢包周转效率、提升钢厂经营效益。
其四,本发明通过控制刚玉复合料、铝镁尖晶石、氧化铝微粉、纯铝酸钙水泥、增塑剂的粒度和加入量,外加减水剂与防爆纤维,以及均混时间、混匀时间和加水量等工艺参数,可以制备出一种具有良好的粘附性能、适当的铺展性能,中高温强度高、整体性能好,抗冲刷、抗侵蚀性能优良,使用寿命长,节约资源、降低碳排放,具有显著经济效益和社会效益的无碳钢包工作衬用刚玉尖晶石质修补料。
具体实施方式
下面结合实施案例详细说明本发明的实施情况,但它们并不构成对本发明的限定,仅作举例而已。同时通过说明本发明的优点将变得更加清楚和容易理解。
本发明实施例1~4的无碳钢包工作衬用刚玉尖晶石质修补料和对比例1~3的修补料,按质量份数计的配方如表1所示。
表1
本发明实施例1~4的无碳钢包工作衬用刚玉尖晶石质修补料和对比例1~3的修补料的制备方法,包括如下步骤:按照所述原料的成分及其含量进行配料,先将基质料(粒度≤0.088mm的刚玉复合料、粒度≤0.088mm的铝镁尖晶石、氧化铝微粉、纯铝酸钙水泥、增塑剂和减水剂、防爆纤维)和减水剂、防爆纤维进行2-3分钟均混,再将均混后的基质料加入骨料(粒度>0.088mm的刚玉复合料、粒度>0.088mm的铝镁尖晶石)中,搅拌3-5分钟,混合均匀。均混2-3分钟这个工艺过程能够有效降低修补料中的重要原料混合不均匀的现象,避免工艺缺陷造成对产品施工性能和使用性能的不良影响。生产出来的修补料采用防潮半吨袋包装。使用时,外加8.0~9.0%的水,搅拌5~8分钟至状态均匀,装入料斗,使用铁锹抛投后再用抹刀抹平。养生2~4小时后可随钢包进行烘烤,制得无碳钢包工作衬用刚玉尖晶石质修补料。各实施例1~4和对比例1~3的主要工艺参数如下表2所示:
表2
项目 | 均混时间,分钟 | 混匀时间,分钟 | 加水量,% |
实施例1 | 3 | 4 | 8.2 |
实施例2 | 2 | 3 | 8.7 |
实施例3 | 2.5 | 5 | 8.5 |
实施例4 | 3 | 4.5 | 8.6 |
对比例1 | 0 | 6 | 7 |
对比例2 | 4 | 1 | 11 |
对比例3 | 1 | 2 | 13 |
本发明实施例1~4的无碳钢包工作衬用刚玉尖晶石质修补料和对比例1~3的修补料的理化测试结果,如下表3所示:
表3
如上表的实施例1~4所示,在本发明限定的原料加入量及粒度,修补料中加入适量的刚玉复合料、铝镁尖晶石、氧化铝微粉、纯铝酸钙水泥、增塑剂、减水剂、防爆纤维,同时控制好均混时间、混匀时间与加水量这些工艺参数,就能制备出一种具有良好的粘附性能、适当的铺展性能,中高温强度高、整体性能好,抗冲刷、抗侵蚀性能优良,使用寿命长,节约资源、降低碳排放,具有显著经济效益和社会效益的无碳钢包工作衬用刚玉尖晶石质修补料。
相对地,对于未控制原料加入量、生产工艺及加水量的对比例1~3中,修补料不能同时具备良好的粘附性、铺展性,强度与整体性能,抗冲刷、抗侵蚀性能,使用寿命,以及节约资源、降低碳排放,无法满足产品的施工、烘烤和使用性能。
以上,仅为本发明的具体实施方式,应当指出,任何熟悉本领域的技术人员在本发明所揭示的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内,其余未详细说明的为现有技术。
Claims (3)
1.一种无碳钢包工作衬用刚玉尖晶石质修补料,其特征在于:它按质量份数计包括如下组分:
所述刚玉复合料中Al2O3质量百分含量≥85%;其中,1mm<粒度≤3mm的刚玉复合料占刚玉复合料总质量的50~70%,0.088mm<粒度≤1mm的刚玉复合料占刚玉复合料总质量的20~30%,粒度≤0.088mm的刚玉复合料占刚玉复合料总质量的0~30%;
所述铝镁尖晶石中Al2O3质量百分含量为72~78%;其中,0.088mm<粒度≤1mm的铝镁尖晶石占铝镁尖晶石总质量的30~70%,粒度≤0.088mm的铝镁尖晶石占铝镁尖晶石总质量的30~70%;
所述氧化铝微粉中Al2O3质量百分含量≥99%,所述氧化铝微粉粒度为0.5~3μm;
所述纯铝酸钙水泥中Al2O3质量百分含量≥70%,所述纯铝酸钙水泥粒度为≤0.088mm;
所述减水剂为磷酸盐和/或偏磷酸盐;
所述防爆纤维的以聚丙烯为原材料制成,其软化点为102~105℃;
所述无碳钢包工作衬用刚玉尖晶石质修补料由如下方法制备而成:
1)按照组分配方进行配料,先将粒度≤0.088mm的刚玉复合料、粒度≤0.088mm的铝镁尖晶石、氧化铝微粉、纯铝酸钙水泥、增塑剂和减水剂、防爆纤维进行均混,再将均混后的物料加入粒度>0.088mm的刚玉复合料、粒度>0.088mm的铝镁尖晶石中搅拌混合均匀,得到混合料;
2)向步骤1)的混合料中外加8.0~9.0%的水,搅拌5~8分钟至均匀状态,养生2~4小时后随钢包进行烘烤。
2.一种权利要求1所述的无碳钢包工作衬用刚玉尖晶石质修补料的制备方法,其特征在于:包括如下步骤:
1)按照组分配方进行配料,先将粒度≤0.088mm的刚玉复合料、粒度≤0.088mm的铝镁尖晶石、氧化铝微粉、纯铝酸钙水泥、增塑剂和减水剂、防爆纤维进行均混,再将均混后的物料加入粒度>0.088mm的刚玉复合料、粒度>0.088mm的铝镁尖晶石中搅拌混合均匀,得到混合料;
2)向步骤1)的混合料中外加8.0~9.0%的水,搅拌5~8分钟至均匀状态,养生2~4小时后随钢包进行烘烤。
3.根据权利要求2所述的无碳钢包工作衬用刚玉尖晶石质修补料的制备方法,其特征在于:所述步骤1)中均混的时间为2~3分钟,搅拌的时间为3~5分钟。
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