CN112374871B - 一种摆动流嘴用抗侵蚀的浇注料及其制备方法和用途 - Google Patents

一种摆动流嘴用抗侵蚀的浇注料及其制备方法和用途 Download PDF

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CN112374871B
CN112374871B CN202011387224.4A CN202011387224A CN112374871B CN 112374871 B CN112374871 B CN 112374871B CN 202011387224 A CN202011387224 A CN 202011387224A CN 112374871 B CN112374871 B CN 112374871B
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田峰
胡波
吴佳彬
武传金
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Shanghai Baojiuhe Refractory Material Co ltd
MCC Baosteel Technology Services Co Ltd
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Abstract

本发明涉及冶金领域,特别是涉及一种摆动流嘴用抗侵蚀的浇注料及其制备方法和用途。该浇注料按重量份计,包括如下组分:致密刚玉:30‑45份;白刚玉:20‑30份;氧化铝粉:8‑15份;碳化硅:12‑25份;硅微粉:0.5‑2份;微粒沥青:1‑3份;石墨超细粉:1.2‑4份;结合剂:1‑5份;分散剂:0.01‑0.08份;减水剂:0.05‑0.2份;缓凝剂:0.03‑0.06份;防爆剂:0.01‑0.1份。本发明的制备方法简单,材料成本低,获得的浇注料稳定性好、强度高、耐侵蚀、寿命长,因其优越的性能,可满足高炉摆动使用要求。

Description

一种摆动流嘴用抗侵蚀的浇注料及其制备方法和用途
技术领域
本发明涉及冶金领域,特别是涉及一种摆动流嘴用抗侵蚀的浇注料及其制备方法和用途。
背景技术
近年来,为响应国家有关节能减排要求,新建高炉在向大型化、自动化发展的同时,减少有害气体的排放、降低炉前工劳动强度、提高生产现场安全状况也得到广泛关注。这就使得,对包括摆动流嘴在内的各项生产、施工工艺流程提出了更高的要求。
现阶段摆动流嘴主要施工工艺是采用捣打料或者浇注料整体浇注,出铁时,摆动流嘴内储存一定量的铁水,对铁水下落至摆动流嘴内起到一定的缓冲作用。使用后需修补时,将摆动流嘴内渣铁清理干净,再对摆动流嘴进行整体修补。由于落铁点部位是摆动流嘴磨损的主要部位,而其他部位磨损很少,因此大大限制了摆动流嘴的整体使用寿命,且需对摆动流嘴进行整体修补,造成修补频繁,工人劳动强度大,耐材消耗多。修补完成后如果烘烤不当,容易形成裂纹,给高炉正常出铁带来了安全隐患。
发明内容
本发明的目的在于克服现有技术的缺陷,提供一种摆动流嘴用抗侵蚀的浇注料及其制备方法和用途,该浇注料的制备方法简单,材料成本低,获得的浇注料稳定性好、强度高、耐侵蚀、寿命长,因其优越的性能,可满足高炉摆动使用要求。
本发明是通过以下技术方案实现的:
本发明第一方面提供一种浇注料,按重量份计,包括如下组分:
致密刚玉:30-45份,如30-31份、31-40份或40-45份;
白刚玉:20-30份,如20-24份、24-26份或26-30份;
氧化铝粉:8-15份,如8-9份、9-11份或11-15份;
碳化硅:12-25份,12-20份、20-24份或24-25份;
硅微粉:0.5-2份,0.5-1份、1-1.5份或1.5-2份;
微粒沥青:1-3份,如1-1.5份、1.5-2份或2-3份;
石墨超细粉:1.2-4份;1.2-1.65份、1.65-3份或3-4份;
金属硅粉:0.5-1.5份,如0.5-1份或1-1.5份;
结合剂:1-5份,如1-2.5份、2.5-3份或3-5份;
分散剂:0.01-0.08份,如0.01-0.05份或0.05-0.08份;
减水剂:0.01-0.2份,如0.01-0.02份或0.02-0.2份;
缓凝剂:0.03-0.06份,如0.03-0.04份或0.04-0.06份;
促凝剂:0.01-0.05份,如0.01-0.03份或0.03-0.05份;
防爆剂:0.01-0.1份,如0.01-0.02份份或0.02-0.1份。
优选地,还包括如下技术特征中的至少一项:
1)所述致密刚玉为连续级配,粒径规格包括10mm-5mm和5mm-3mm,Al2O3含量≥99wt%,区间筛分含量≥85wt%;
2)所述白刚玉为连续级配,粒径规格包括1mm-0mm和3mm-1mm,Al2O3含量≥98wt%,区间筛分含量≥90wt%;
3)所述氧化铝粉包括第一氧化铝粉和第二氧化铝粉;所述第一氧化铝粉:粒径规格为10μm-18μm、Al2O3含量>98.5%;所述第二氧化铝粉:粒径规格为1.2μm-2μm、Al2O3含量>99wt%、Fe和Si含量≤0.05wt%;
4)所述碳化硅包括粉料碳化硅和骨料碳化硅,所述粉料碳化硅粒径为200目-325目,所述骨料碳化硅粒径规格包括1mm-0mm和5mm-3mm;
5)所述硅微粉:SiO2含量≥96wt%,粒径为1.2μm-2μm;
6)所述微粒沥青:固定碳含量>70wt%,粒径<0.5mm;
7)所述石墨超细粉:C含量>99wt%,粒径为1.2μm-2μm;
8)所述金属硅粉:Si含量>97wt%,粒径为200目-325目,如200目-260目或260目-325目;
9)所述结合剂为纯铝酸盐水泥,铝含量>78wt%;
10)所述分散剂选自聚丙烯酸钠和聚甲基丙稀酸钠中至少一种;
11)所述减水剂选自M-100和三聚磷酸钠中至少一种;
12)所述缓凝剂选自柠檬酸和硼酸中至少一种;
13)所述促凝剂选自碳酸锂和偏铝酸钠中至少一种。
更优选地,特征1)中,粒径规格为5mm-3mm的致密刚玉和粒径规格为10mm-5mm的致密刚玉重量比为1:4-1:5.8,如1:4-1:5.2、1:5.2-1:5.4或1:5.4-1:5.8。
更优选地,特征2)中,粒径规格为1mm-0mm的白刚玉和粒径规格为3mm-1mm的白刚玉重量比为1:0.5-1:1,如1:0.5-1:0.7、1:0.7-1:0.73或1:0.73-1:1。
更优选地,特征3)中,所述第一氧化铝粉和所述第二氧化铝粉的重量比为1:2.4-1:4,如1:2.4-1:2.7、1:2.7-1:2.8或1:2.8-1:4。
更优选地,特征4)中,所述粉料碳化硅和所述骨料碳化硅的重量比1:1-1:1.5,如1:1-1:1.2、1:1.2-1:1.4或1:1.4-1:1.5。
优选地,所述防爆剂为水溶性有机纤维如聚乙烯醇超短纤维,长度为4mm-7mm,如4mm-5mm或5mm-7mm。
本发明第二方面提供上述浇注料的制备方法,包括如下步骤:按重量份,将各组分进行混炼。
优选地,混炼时间为180秒-300秒。
本发明第三方面提供上述浇注料的用途,在摆动流嘴用耐火材料中的用途。
本发明上述技术方案具有如下有益效果中的至少一项:
1、本发明选用石墨超细粉:C含量>99wt%,粒径为2μm,掺入比例1.2-4%,掺入比例合理,提高材料性能及使用寿命。
2、石墨超细粉又名碳黑是一种以碳(C)为主体的材料,材料本身具有较好的传导性和耐高温性。多用于橡胶行业,因其具有抗氧化、抗侵蚀性能及分散性,可对材料起到一定的补强作用提高材料强度、提高材料流动性,在高温作用下发挥其的抗氧化性,在材料表面形成抗氧化、抗侵蚀层从而提高材料的抗氧化、抗侵蚀能力提高材料的使用寿命。因其优越的性能,可满足高炉摆动使用要求。
3、在高温作用下发挥石墨超细粉的抗氧化性,在材料表面形成抗氧化、抗侵蚀层从而提高材料的抗氧化、抗侵蚀能力提高材料的使用寿命。本专利首次提出利用石墨超细粉制造耐火材料,并且掺量合理,为钢厂摆动提供了一种新型耐材产品,满足强度、耐侵蚀、长寿命的要求。
具体实施方式
以下通过特定的具体实例说明本发明的技术方案。应理解,本发明提到的一个或多个方法步骤并不排斥在所述组合步骤前后还存在其他方法步骤或在这些明确提到的步骤之间还可以插入其他方法步骤;还应理解,这些实施例仅用于说明本发明而不用于限制本发明的范围。而且,除非另有说明,各方法步骤的编号仅为鉴别各方法步骤的便利工具,而非为限制各方法步骤的排列次序或限定本发明可实施的范围,其相对关系的改变或调整,在无实质变更技术内容的情况下,当亦视为本发明可实施的范畴。
下述实施例中,各原料指标如下:
所述致密刚玉为连续级配,粒径规格包括10mm-5mm和5mm-3mm,Al2O3含量≥99wt%,区间筛分含量≥85wt%;粒径规格为5mm-3mm的致密刚玉和粒径规格为10mm-5mm的致密刚玉重量比为1:4-1:5.8。
所述白刚玉为连续级配,粒径规格包括1mm-0mm和3mm-1mm,Al2O3含量≥98wt%,区间筛分含量≥90wt%;粒径规格为1mm-0mm的白刚玉和粒径规格为3mm-1mm的白刚玉重量比为1:0.5-1:1。
所述氧化铝粉包括第一氧化铝粉和第二氧化铝粉;所述第一氧化铝粉:粒径规格为800目、Al2O3含量>98.5%;所述第二氧化铝粉:粒径规格为2μm、Al2O3含量>99wt%、Fe和Si含量≤0.05wt%;所述第一氧化铝粉和所述第二氧化铝粉的重量比为1:2.4-1:4。
所述碳化硅包括粉料碳化硅和骨料碳化硅,所述粉料碳化硅粒径为200目-325目,所述骨料碳化硅粒径规格包括1mm-0mm和5mm-3mm;所述粉料碳化硅和所述骨料碳化硅的重量比1:1-1:1.5。
所述硅微粉:SiO2含量≥96wt%,粒径为1.2μm-2μm。
所述微粒沥青:固定碳含量>70wt%,粒径<0.5mm。
所述石墨超细粉:C含量>99wt%,粒径为1.2μm-2μm。
所述金属硅粉:Si含量>97wt%,粒径为200目-325目,实施例1和实施例2为325目,实施例3为200目,实施例4为260目。
所述结合剂为纯铝酸盐水泥,铝含量>78wt%。
所述分散剂为聚丙烯酸钠。
所述减水剂为M-100。
所述缓凝剂为柠檬酸。
所述防爆剂为聚乙烯醇超短纤维,长度为5mm。
本发明具体配方按重量比为:
Figure BDA0002810023970000041
Figure BDA0002810023970000051
按照工艺流程在主控台设置配方;称量分散剂、减水剂、缓凝剂、促凝剂、防爆剂小料。启动计量设备,准确称量各物料至中间称量料仓后进入输送系统;由输送系统经提升料斗进入混炼机,并由小料投放口投放小料进行混炼,混炼时间180秒;混炼后,由包装系统进行吨袋包装,码垛。
将实施例1、2对比例1、2体积密度、线变化率、抗折强度、抗压强度进行测量并比较。
Figure BDA0002810023970000061
从结果看,使用石墨超细粉,性能指标均符合标准要求,并且强度指标更优。

Claims (10)

1.一种浇注料,其特征在于,按重量份计,包括如下组分:
致密刚玉:30-45份;
白刚玉:20-30份;
氧化铝粉:8-15份;
碳化硅:12-25份;
硅微粉:0.5-2份;
微粒沥青:1-3份;
石墨超细粉:1.2-4份;
金属硅粉:0.5-1.5份;
结合剂:1-5份;
分散剂:0.01-0.08份;
减水剂:0.01-0.2份;
缓凝剂:0.03-0.06份;
促凝剂:0.01-0.05份;
防爆剂:0.01-0.1份;
所述致密刚玉为连续级配,粒径规格为10mm-5mm和5mm-3mm,Al2O3含量≥99wt%,区间筛分含量≥85wt%;粒径规格为5mm-3mm的致密刚玉和粒径规格为10mm-5mm的致密刚玉重量比为1:4-1:5.8;
所述氧化铝粉包括第一氧化铝粉和第二氧化铝粉;所述第一氧化铝粉:粒径规格为10μm-18μm、Al2O3含量>98.5%;所述第二氧化铝粉:粒径规格为1.2μm-2μm、Al2O3含量>99wt%、Fe和Si含量≤0.05wt%;所述第一氧化铝粉和所述第二氧化铝粉的重量比为1:2.4-1:4;
所述石墨超细粉:C含量>99wt%,粒径为1.2μm-2μm;
所述碳化硅包括粉料碳化硅和骨料碳化硅,所述粉料碳化硅粒径为200目-325目,所述骨料碳化硅粒径规格为1mm-0mm和5mm-3mm;所述粉料碳化硅和所述骨料碳化硅的重量比1:1-1:1.5;
所述硅微粉:SiO2含量≥96wt%,粒径为1.2μm-2μm;
所述防爆剂为水溶性有机纤维,长度为4mm-7mm。
2.如权利要求1所述的浇注料,其特征在于,还包括如下技术特征中的至少一项:
1)所述白刚玉为连续级配,粒径规格为1mm-0mm和3mm-1mm,Al2O3含量≥98wt%,区间筛分含量≥90wt%;
2)所述减水剂选自M-100和三聚磷酸钠中至少一种;
3)所述缓凝剂选自柠檬酸和硼酸中至少一种;
4)所述促凝剂选自碳酸锂和偏铝酸钠中至少一种。
3.如权利要求2所述的浇注料,其特征在于,特征1)中,粒径规格为1mm-0mm的白刚玉和粒径规格为3mm-1mm的白刚玉重量比为1:0.5-1:1。
4.如权利要求1所述的浇注料,其特征在于,所述微粒沥青:固定碳含量>70wt%,粒径<0.5mm。
5.如权利要求1所述的浇注料,其特征在于,所述金属硅粉:Si含量>97wt%,粒径为200目-325目。
6.如权利要求1所述的浇注料,其特征在于,所述结合剂为纯铝酸盐水泥,铝含量>78wt%。
7.如权利要求1所述的浇注料,其特征在于,所述分散剂选自聚丙烯酸钠和聚甲基丙烯酸钠中至少一种。
8.如权利要求1至7任一项所述的浇注料的制备方法,其特征在于,包括如下步骤:按重量份,将各组分进行混炼。
9.如权利要求8所述的浇注料的制备方法,其特征在于,混炼时间为180秒-300秒。
10.如权利要求1至7任一项所述的浇注料在摆动流嘴用耐火材料中的用途。
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