CN111170727A - 钢包内衬用微粉结合涂抹修补料及其制备方法和应用 - Google Patents
钢包内衬用微粉结合涂抹修补料及其制备方法和应用 Download PDFInfo
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Abstract
本发明涉及其由如下重量份A原料和B原料制成:A原料包括:回收刚玉骨料20~35份、板状刚玉45~60份、镁砂6~7份、微粉结合剂2~6份、其它微粉8~11份;B原料包括:相当于所述A原料总重量0.1%的防爆纤维,本发明所提供的微粉结合涂抹修补料具备较好的粘结性,易于施工,强度高,高温促进材料烧结,能较好的与钢包内衬材料表面形成牢固的渗透粘结,抗渣性能好,抵抗钢水及钢渣的冲刷和侵蚀的性能,起到保护工作衬的作用,具有较好的使用效果,同时该产品骨料部分使用用后刚玉回收料,以实现资源的回收利用。
Description
技术领域
本发明属于不定型耐火材料技术领域,具体涉及一种钢包内衬用微粉结合涂抹修补料及其制备方法和应用。
背景技术
随着国家对钢铁行业产能和结构的调控和整合,钢铁行业重组和优化,精炼钢比例不断升高,对耐火材料的要求也不断提高。钢包内衬在使用过程中由于钢水侵蚀、渗透和冲刷等逐渐变薄,当内衬材料局部变薄,就需要对钢包进行局部修补或者重砌。精炼钢比例提高,导致钢包内衬与透气砖不同步的情况频现,因此,钢包需要多次下线更换新的吹氩透气砖,每次下线即为冷修一次,由于钢包频繁下线,导致钢包内衬材料在热胀冷缩过程中损耗极大,包龄大幅下降,不仅影响炼钢生产节奏,同时耐火材料的消耗量增加,工人劳动强度大。因此,在保证钢包安全使用的前提下,合理的提高钢包寿命,是提高每个包役使用次数的关键。提高钢包包龄,也就是降低了耐材的综合消耗,提高耐材使用率。
然而,钢包修补技术发展至今仍不够完善,无论是修补施工技术还是修补料的研制都有很大的研发空间,目前市场应用的钢包涂抹料修补料使用的结合剂有固体水玻璃、白泥和铝酸钙水泥、磷酸盐等,辅助外加硅微粉作为促烧剂,以增强涂抹料修补料的烧结性能。但是,存在的主要问题是施工性能不稳定,修补料烧后与内衬材料烧结性能不好,抗渣侵蚀性能较差等。
有鉴于此,需要发明一种施工粘结性好,与内衬材料烧结性能好、抗渣侵蚀性能好的涂抹修补料。
发明内容
本发明的目的在于克服现有技术中存在的问题,提供一种钢包内衬用微粉结合涂抹修补料,采用新型微粉作为结合剂,具有施工粘结性好、常温、高温强度高,烧结性好且烧后与内衬材料形成很好的渗透粘结,抗渣侵蚀性能好,同时该产品骨料部分使用用后刚玉回收料,达到降低成本,资源回收利用的目的。并同时提供其制备方法和应用。
为实现上述目的,本发明所采取的技术方案是:
技术主题一
一种钢包内衬用微粉结合涂抹修补料,其由如下重量份A原料和B原料制成:
A原料包括:回收刚玉骨料20~35份、板状刚玉45~60份、镁砂6~7份、微粉结合剂2~6份、其它微粉8~11份;
B原料包括:相当于所述A原料总重量0.1%的防爆纤维。
作为本发明的一些实施方案,所述B原料还包括相当于所述A原料总重量1%的增塑剂。
作为本发明的一些实施方案,所述回收刚玉骨料包括粒度5~3mm的0~12份和3~1mm的20~30份;优选的,所述回收刚玉骨料为用后刚玉砖拣选破碎料Al2O3+MgO含量≥89%,Fe2O3≤1.2%。
作为本发明的一些实施方案,所述板状刚玉包括粒度1~0mm的22~32份和≤0.088mm的23~35份;优选的,所述板状刚玉的Al2O3含量≥99%。
作为本发明的一些实施方案,镁砂为粒度≤0.088mm;优选的,所述镁砂的MgO含量≥95%的电熔镁砂。
作为本发明的一些实施方案,所述微粉结合剂粒度D50<2μm;优选的,Al2O3+MgO含量≥90%的微粉。
作为本发明的一些实施方案,所述的其它微粉为氧化铝微粉或/和二氧化硅微粉,优选的,所述氧化铝微粉的Al2O3含量≥99%,所述二氧化硅微粉的SiO2含量≥95%。
作为本发明的一些实施方案,所述增塑剂为糊精。
技术主题二
本发明另一方面提供了一种上述涂抹修补料的制备方法,具体包括:按照配比称取各原料,混合均匀,即得。
技术主题三
本发明再一方面提供了一种所述涂抹修补料在修复钢包中的应用。
采用上述技术方案所产生的有益效果在于:
本发明所提供的钢包内衬用微粉结合涂抹修补料,采用回收刚玉,用以替代部分板状刚玉,达到降低成本,资源回收利用的目的。采用新型微粉作为结合剂配合使用硅微粉和氧化铝微粉,与传统修补料采用白泥和磷酸盐相比,具有施工性能好,强度高,烧结性能好等优点。
本发明所提供对的钢包内衬涂抹修补料在使用时,具有操作简单,使用效果好的特点,能充分保证钢包安全运行,提高钢包综合经济效益,具有良好的推广应用价值。
本发明所提供的微粉结合涂抹修补料具备较好的粘结性,易于施工,强度高,高温促进材料烧结,能较好的与钢包内衬材料表面形成牢固的渗透粘结,抗渣性能好,抵抗钢水及钢渣的冲刷和侵蚀的性能,起到保护工作衬的作用,具有较好的使用效果。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚,下面结合具体实施例对发明进行清楚、完整的描述。
在本实施例部分,如无特殊说明,各个原料成分如下:
回收刚玉骨料的Al2O3+MgO质量百分含量≥89%, Fe2O3<1.2%;板状刚玉的Al2O3质量百分含量≥99%;电熔镁砂细粉MgO质量百分含量≥95%;氧化铝微粉中的Al2O3质量百分含量≥99%;二氧化硅微粉中的SiO2质量百分含量≥95%;微粉结合剂的Al2O3+MgO含量≥90%。
实施例1
一种钢包内衬用微粉结合涂抹修补料,有以下原料组成:
5~3mm回收刚玉骨料12Kg、3~1mm回收刚玉骨料23Kg、1~0mm板状刚玉骨料22Kg、粒度≤0.088mm板状刚玉细粉23Kg、电熔镁砂细粉7Kg、二氧化硅微粉2Kg和氧化铝微粉9Kg、微粉结合剂2Kg,另外加入相当于前述原料总重量0.1%的防爆纤维。
制备方法如下:
将上述原料加入强制搅拌器内搅拌,先加骨料,再加细粉、微粉和结合剂再搅拌10min,搅拌均匀即可出料。
实施例2
一种钢包内衬用微粉结合涂抹修补料,有以下原料组成:
3~1mm回收刚玉骨料30Kg、1~0mm板状刚玉骨料25Kg、粒度≤0.088mm板状刚玉细粉25Kg、电熔镁砂细粉6Kg、二氧化硅微粉2Kg和氧化铝微粉8Kg、微粉结合剂4Kg,另外加入相当于前述原料总重量0.1%的防爆纤维。
制备方法如下:
将上述原料加入强制搅拌器内搅拌,先加骨料,再加细粉、微粉和结合剂再搅拌10min,搅拌均匀即可出料。
实施例3
一种钢包内衬用微粉结合涂抹修补料,有以下原料组成:
3~1mm回收刚玉骨料20Kg、1~0mm板状刚玉骨料32Kg、粒度≤0.088mm板状刚玉细粉28Kg、电熔镁砂细粉6Kg、二氧化硅微粉2Kg和氧化铝微粉6Kg、微粉结合剂6Kg,另外加入相当于前述原料总重量0.1%的防爆纤维和1%的糊精。
制备方法如下:
将上述原料加入强制搅拌器内搅拌,先加骨料,再加细粉、微粉和结合剂再搅拌10min,搅拌均匀即可出料。
效果例1
将实施例1~3得到的涂抹修补料按照如下施工方法进行钢包修补:
首先把钢包内衬耐火材料表面的异物清理干净,将钢包内衬用微粉结合涂抹修补料投入搅拌机中加入9%的水搅拌混合均匀,均匀涂抹在钢包内衬耐火材料表面,涂抹时先用少量料涂抹在缝、坑等低洼处,形成有效粘结料点,待料粘结好后再进行大面积涂抹,涂抹顺序为点-线-面,逐层增厚涂抹,防止物料脱落。涂抹完成后将表面进行处理,保证表面光滑无坑洞,经过养护9小时后,进行烘烤,即可投入使用,并对性能进行测试具体见表1。
表1 各实施例的钢包内衬用微粉结合涂抹修补料性能测试结果
实施例 | 涂抹性能 | 抗折强度110℃×24h(MPa) | 耐压强度110℃×24h(MPa) | 抗折强度1550℃×3h(MPa) | 耐压强度1550℃×3h(MPa) | 烧后与内衬材料渗透粘结性 | 抗渣性能 |
1 | 好 | 9.4 | 36 | 20.1 | 96.1 | 好 | 好 |
2 | 好 | 11.7 | 39.9 | 24.2 | 114.4 | 好 | 好 |
3 | 好 | 12.2 | 40.3 | 24.4 | 117.8 | 好 | 较好 |
从表1可以看出,本发明的钢包内衬用微粉结合涂抹修补料施工粘结性好,常温、高温强度高,烧结性好并且烧后与内衬材料形成很好的渗透粘结,抗渣性能好。可用于钢包包壁、包底修补局部熔损部位,也可用于钢包内衬整体修补。钢包在使用过程中多次下线小修涂抹,可极大的提高钢包的使用寿命。在国内某钢厂110吨钢包整体涂抹30mm厚钢包内衬用微粉结合涂抹修补料,钢包全程精炼,可以延长钢包内衬使用寿命15次以上,降低了吨钢耐材消耗,具有显著的经济效益和社会效益。
最后应说明的是:以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明实施例技术方案的精神和范围。
Claims (10)
1.一种钢包内衬用微粉结合涂抹修补料,其特征在于,其由如下重量份A原料和B原料制成:
A原料包括:回收刚玉骨料20~35份、板状刚玉45~60份、镁砂6~7份、微粉结合剂2~6份、其它微粉8~11份;
B原料包括:相当于所述A原料总重量0.1%的防爆纤维。
2.根据权利要求1所述的钢包内衬用微粉结合涂抹修补料,其特征在于,所述B原料还包括相当于所述A原料总重量1%的增塑剂。
3.根据权利要求1所述的钢包内衬用微粉结合涂抹修补料,其特征在于,所述回收刚玉骨料包括粒度5~3mm的0~12份和3~1mm的20~30份;优选的,所述回收刚玉骨料为用后刚玉砖拣选破碎料Al2O3+MgO含量≥89%,Fe2O3≤1.2%。
4.根据权利要求1所述的钢包内衬用微粉结合涂抹修补料,其特征在于,所述板状刚玉包括粒度1~0mm的22~32份和≤0.088mm的23~35份;优选的,所述板状刚玉的Al2O3含量≥99%。
5.根据权利要求1所述的钢包内衬用微粉结合涂抹修补料,其特征在于,镁砂为粒度≤0.088mm;优选的,所述镁砂的MgO含量≥95%的电熔镁砂。
6.根据权利要求1所述的钢包内衬用微粉结合涂抹修补料,其特征在于,所述微粉结合剂粒度D50<2μm;优选的,Al2O3+MgO含量≥90%的微粉。
7.根据权利要求1所述的钢包内衬用微粉结合涂抹修补料,其特征在于,所述的其它微粉为氧化铝微粉或/和二氧化硅微粉,优选的,所述氧化铝微粉的Al2O3含量≥99%,所述二氧化硅微粉的SiO2含量≥95%。
8.根据权利要求1所述的钢包内衬用微粉结合涂抹修补料,其特征在于,所述增塑剂为糊精。
9.一种如权利要求1-8任一项所述的涂抹修补料的制备方法,其特征在于,具体包括:按照配比称取各原料,混合均匀,即得。
10.一种如权利要求1-8任一项所述的涂抹修补料在修复钢包中的应用。
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