CN110156462A - 冶炼不锈钢用耐侵蚀长寿命的浸入式水口及其生产方法 - Google Patents

冶炼不锈钢用耐侵蚀长寿命的浸入式水口及其生产方法 Download PDF

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CN110156462A
CN110156462A CN201910470818.2A CN201910470818A CN110156462A CN 110156462 A CN110156462 A CN 110156462A CN 201910470818 A CN201910470818 A CN 201910470818A CN 110156462 A CN110156462 A CN 110156462A
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baddeleyite
submersed nozzle
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李涛
孙逊
张程
徐福余
李志义
吴比
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ANSHAN HE FENG REFRACTORY MATERIAL Co Ltd
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Abstract

一种耐侵蚀长寿命的浸入式水口及其生产方法,其渣线部位材料按重量份数包括:氧化钙稳定氧化锆或斜锆石40目20~30份、氧化钙稳定氧化锆或斜锆石100目20~30份、氧化钙稳定氧化锆或斜锆石325目25~35份、鳞片石墨5~15份、SiC粉0~5份、金属Si粉0.5~5份、B4C粉0~3份、六铝酸钙180目2~6份、液体树脂4~8份、固体树脂粉0~2份。本发明通过优化浸入式水口渣线部位耐材的工艺配比,引入挤压造粒工艺,改善浸入式水口渣线部位耐材的高温抗耐侵蚀性能;延缓浸入式水口渣线部位浸润、侵蚀而变质熔损、脱落的发生,提高浸入式水口使用寿命。

Description

冶炼不锈钢用耐侵蚀长寿命的浸入式水口及其生产方法
技术领域
本发明涉及炼钢厂中间包冶炼纯净钢用功能性耐火材料,尤其涉及一种冶炼不锈钢用耐侵蚀长寿命的浸入式水口及其生产方法。
背景技术
浸入式水口是用于保护和控制钢水从中间包流入结晶器的装置,浸入式水口除了为稳定的钢流提供保障的同时,还具有隔离大气防止钢水二次氧化及防止钢水降温的作用。是极重要的功能性耐火材料。见图1。
因此,浸入式水口,其内层耐火材料要抵抗中间包流出高温钢水的冲刷、侵蚀之外,其外层耐火材料渣线部位要遭受各种碱度、成份的连铸保护渣及钢渣的侵蚀,其外层耐火材料出钢孔部位既要遭受高速流动钢水的冲刷和冲击,另外,由于结晶器的持续震动,带动钢水对浸入水口造成不间断地机械冲击。
目前用于冶炼不锈钢等精品钢中间包用长浇次浸入水口的损毁情况,其主要缺陷,主要是渣线部位抗侵蚀、剥落性能不能满足要求,融损数率太快,无法满足长浇次的需要,在钢水浇注过程中,如果浸入式水口渣线部位侵蚀严重,残余厚度过薄,容易折断,无法控制钢水流动,会造成大的生产事故。
发明内容
本发明的目的在于提供冶炼不锈钢用耐侵蚀长寿命的浸入式水口及其生产方法,通过优化浸入式水口渣线部位耐材的工艺配比,同时在生产工艺中引入挤压造粒工艺,改善浸入式水口渣线部位耐材的高温抗耐侵蚀性能;封闭水口渣线部位耐材的气孔,阻止钢水和钢渣向耐材内部浸润、侵蚀,延缓浸入式水口渣线部位耐材因钢水和钢渣向耐材内部浸润、侵蚀而变质熔损、脱落的发生,从而大大改善浸入式水口渣线部位耐材的高温抗耐侵蚀性能,最终提高浸入式水口使用寿命。
为了达到上述目的,本发明采用以下技术方案实现:
冶炼不锈钢用耐侵蚀长寿命的浸入式水口,其渣线部位材料按重量份数包括:氧化钙稳定氧化锆和或斜锆石40目20~30份、氧化钙稳定氧化锆和或斜锆石100目20~30份、氧化钙稳定氧化锆和或斜锆石325目25~35份、鳞片石墨5~15份、SiC粉0~5份、金属Si粉0.5~5份、B4C粉0~3份、六铝酸钙180目2~6份、液体树脂4~8份、固体树脂粉0~2份。
所述鳞片石墨为正598鳞片石墨。
冶炼不锈钢用耐侵蚀长寿命的浸入式水口的生产方法,其渣线部位泥料的生产方法包括如下步骤:
1)按原料成分、粒度、重量比例进行称量配料,公差小于0.02公斤,封闭备用;
2)将氧化钙稳定氧化锆和或斜锆石325目5~10份、SiC粉0~5份、金属Si粉0.5~5份、B4C粉0~3份、六铝酸钙180目2~6份、固体树脂粉0~2份,预先用0.5L双螺旋锥形预混器混合15-30分钟,作为预混粉待用;
3)将氧化钙稳定氧化锆和或斜锆石40目20~30份,氧化钙稳定氧化锆和或斜锆石100目20~30份,配预混粉剩余的氧化钙稳定氧化锆和或斜锆石325目,投入到可调速混合造粒机中,一次高速混合2-6分钟,然后加入鳞片石墨5~15份,以及全部预混粉,二次高速混合2-6分钟,最后加入液体树脂为4~8份,三次高速混合2-10分钟,最后出料;
4)混好的泥料,进入到捏合机挤压20-30分钟,将松散的泥料挤压成致密的块状料,之后再将块状料投入到锤式破碎机,破碎后的泥料经过0.6mm振动筛筛分,筛上料重新破碎,筛下料继续进入干燥机或烘干机,边搅拌边加热烘干,烘干温度为50-65℃,20-30分钟;
5)1000-2000公斤的泥料,在成型使用前,在专用均混机中混合15-30分钟,使不同时间生产的泥料均匀稳定;
6)均混好的泥料在固定的温度、湿度下放置12-36小时,即可成型生产。
与现有技术相比,本发明的有益效果是:
1)引入挤压造粒工艺,将混炼机出来的泥料二次处理,挤压造粒、破碎筛分,经过处理的泥料气孔率低,异常致密,成型后的渣线部位锆碳质泥料,体积密度提高10%-15%,创新性地改善浸入式水口渣线部位耐材的高温抗耐侵蚀性能;
2)将浸入水口渣线部位的原氧化锆-碳材质进行优化,引入2~6份六铝酸钙,利用其高温时能够提高熔渣粘度的特性,使新发明的浸入式水口渣线部位耐材在高温使用时,表面覆盖一层高粘度液相熔渣,封闭水口渣线部位耐材的气孔,阻止钢水和钢渣线耐材内部浸润、侵蚀,延缓浸入式水口渣线部位耐材因钢水和钢渣向耐材内部浸润、侵蚀而变质熔损、脱落的发生;
3)本发明大大的改善了浸入式水口渣线部位耐材的高温抗耐侵蚀性能,最终提高浸入式水口使用寿命,满足钢厂用户冶炼不锈钢、超低碳钢等精品钢中间包用长浇次生产的需要。
本发明的耐侵蚀长寿命的浸入式水口,其渣线部位体积密度提高10%-15%,使用寿命提高明显。以某钢厂炼钢总厂二分厂热轧连铸机用浸入式水口为例,其渣线部位体积密度从3.98g/cm3提高到4.40g/cm3,浇注使用时间从之前的8小时,提高到10小时以上,满足钢厂用户冶炼不锈钢、超低碳钢等精品钢中间包用长浇次生产的需要。
附图说明
图1是浸入式水口的工作状态示意图。
图2是本发明的生产工艺流程图。
图中:1-长水口、2-塞棒、3-中包透气水口、4-浸入式水口。
具体实施方式
下面对本发明的具体实施方式作进一步说明:
冶炼不锈钢用耐侵蚀长寿命的浸入式水口,其渣线部位材料按重量份数包括:氧化钙稳定氧化锆和或斜锆石40目20~30份、氧化钙稳定氧化锆和或斜锆石100目20~30份、氧化钙稳定氧化锆和或斜锆石325目25~35份、鳞片石墨5~15份、SiC粉0~5份、金属Si粉0.5~5份、B4C粉0~3份、六铝酸钙180目2~6份、液体树脂4~8份、固体树脂粉0~2份。
所述鳞片石墨为正598鳞片石墨,石墨粒度为500目的筛子以上,碳含量大于98%。
冶炼不锈钢用耐侵蚀长寿命的浸入式水口的生产方法,其渣线部位泥料的生产方法包括如下步骤:
1)按原料成分、粒度、重量比例进行称量配料,公差小于0.02公斤,封闭备用;
2)将氧化钙稳定氧化锆和或斜锆石325目5~10份、SiC粉0~5份、金属Si粉0.5~5份、B4C粉0~3份、六铝酸钙180目2~6份、固体树脂粉0~2份,预先用0.5L双螺旋锥形预混器混合15-30分钟,作为预混粉待用;
3)将氧化钙稳定氧化锆和或斜锆石40目20~30份,氧化钙稳定氧化锆和或斜锆石100目20~30份,配预混粉剩余的氧化钙稳定氧化锆和或斜锆石325目,投入到可调速混合造粒机中,一次高速混合2-6分钟,然后加入正598鳞片石墨5~15份,以及全部预混粉,二次高速混合2-6分钟,最后加入液体树脂为4~8份,三次高速混合2-10分钟,期间可根据泥料效果,换高、中、低档转速混合,最后出料;
4)混好的泥料,进入到捏合机挤压20-30分钟,通过特有的挤压结构,将松散的泥料挤压成致密的块状料,之后再将块状料投入到锤式破碎机,破碎后的泥料必须经过0.6mm振动筛筛分,筛上料重新破碎,筛下料继续进入干燥机或烘干机,边搅拌边加热烘干,烘干温度为50-65℃,20-30分钟,挥发份检测合格出料;
5)为保证不同泥料成份、挥发份的均匀稳定,1000-2000公斤的泥料,在成型使用前,还要在专用均混机中混合15-30分钟,使不同时间生产的泥料均匀稳定;
6)均混好的泥料在固定的温度、湿度下放置12-36小时,即可成型生产。
实施例:
广州某钢厂于2003年2月17日动工兴建,为华南地区第一家炼钢、热轧、冷轧一贯作业不锈钢厂和最大的专业不锈钢生产基地。年产各种类不锈钢达百万吨,产品包括扁钢胚、钢板、热轧钢卷和冷轧钢卷,尤其是扁钢胚连铸机,所使用的各种牌号不锈钢冶炼要求中间包浸入式水口,要从原来的8-9罐次,提高到12罐次以上。前期其他厂家陆续开展试验,多是渣线部位不耐冲刷,达不到钢厂要求。
本发明通过以下实施例的材料配方及其生产方法,对扁钢胚连铸机中间包浸入式水口进行改造,有效改善浸入式水口渣线部位抗熔渣渗透性,最终提高渣线部位的对熔渣的抗侵蚀性。
实施例1:
各种原料按重量份配比:氧化钙稳定氧化锆40目为26份、氧化钙稳定氧化锆100目为28份、氧化钙稳定氧化锆325目20份,斜锆石325目为10份、正598鳞片石墨为8份、98SiC粉1份、金属Si粉为3份、B4C粉为1份、六铝酸钙180目3份、液体树脂为8份、固体树脂粉1份。
耐侵蚀长寿命的浸入式水口的生产方法,其渣线部位泥料的生产方法包括如下步骤:
1)按原料成分、粒度、重量比例进行称量配料,公差小于0.02公斤,封闭备用;
2)将斜锆石325目10份、98SiC粉、金属Si粉、B4C粉、六铝酸钙180目、固体树脂粉,预先用0.5L双螺旋锥形预混器混合20分钟,作为预混粉待用;
3)将氧化钙稳定氧化锆40目,氧化钙稳定氧化锆100目,氧化钙稳定氧化锆325目20份,投入到可调速混合造粒机中,一次高速混合3分钟,然后加入正598鳞片石墨,以及全部预混粉,二次高速混合6分钟,最后加入液体树脂,三次高速混合8分钟,期间可根据泥料效果,换高、中、低档转速混合,最后出料;
4)混好的泥料,进入到捏合机挤压26-28分钟,通过特有的挤压结构,将松散的泥料挤压成致密的块状料,之后再将块状料投入到锤式破碎机,破碎后的泥料必须经过0.6mm振动筛筛分,筛上料重新破碎,筛下料继续进入干燥机或烘干机,边搅拌边加热烘干,烘干温度为55-60℃,20-22分钟,挥发份检测合格出料;
5)为保证不同泥料成份、挥发份的均匀稳定,1000公斤的泥料,在成型使用前,还要在专用均混机中混合20-22分钟,使不同时间生产的泥料均匀稳定;
6)均混好的泥料在固定的温度、湿度下放置12-36小时,即可成型生产。
实施例2:
各种原料按重量份配比:氧化钙稳定氧化锆40目为28份、氧化钙稳定氧化锆100目为26份、氧化钙稳定氧化锆325目为34份、正598鳞片石墨为10份、98SiC粉3份、金属Si粉为2份、B4C粉为2份、六铝酸钙180目5份、液体树脂为6份、固体树脂粉1.5份。
耐侵蚀长寿命的浸入式水口的生产方法:其中氧化钙稳定氧化锆325目7份、98SiC粉、金属Si粉、B4C粉、六铝酸钙180目、固体树脂粉作为预混粉,其它作为主料混合,其余方法同实施例1。
实施例3:
各种原料按重量份配比:氧化钙稳定氧化锆或斜锆石40目为22份、氧化钙稳定氧化锆100目为14份,斜锆石100目为8份、氧化钙稳定氧化锆325目为8份,斜锆石325目为18份、正598鳞片石墨为13份、98SiC粉4份、金属Si粉为4份、B4C粉为2.5份、六铝酸钙180目4份、液体树脂为5份、固体树脂粉0.5份。
耐侵蚀长寿命的浸入式水口的生产方法:其中斜锆石325目18份、98SiC粉、金属Si粉、B4C粉、六铝酸钙180目、固体树脂粉作为预混粉,其它作为主料混合,其余方法同
实施例1。
本发明实施例在某刚厂炼钢部1450铸机,使用60支,平均使用寿命12.18罐,远远高于原来的8-9罐次,满足钢厂用户冶炼不锈钢、超低碳钢等精品钢中间包用长浇次生产的需要。

Claims (3)

1.冶炼不锈钢用耐侵蚀长寿命的浸入式水口,其特征在于,其渣线部位材料按重量份数包括:氧化钙稳定氧化锆和或斜锆石40目20~30份、氧化钙稳定氧化锆和或斜锆石100目20~30份、氧化钙稳定氧化锆和或斜锆石325目25~35份、鳞片石墨5~15份、SiC粉0~5份、金属Si粉0.5~5份、B4C粉0~3份、六铝酸钙180目2~6份、液体树脂4~8份、固体树脂粉0~2份。
2.根据权利要求1所述的冶炼不锈钢用耐侵蚀长寿命的浸入式水口,其特征在于,所述鳞片石墨为正598鳞片石墨。
3.如权利要求1所述的冶炼不锈钢用耐侵蚀长寿命的浸入式水口的生产方法,其特征在于,其渣线部位泥料的生产方法包括如下步骤:
1)按原料成分、粒度、重量比例进行称量配料,公差小于0.02公斤,封闭备用;
2)将氧化钙稳定氧化锆和或斜锆石325目5~10份、SiC粉0~5份、金属Si粉0.5~5份、B4C粉0~3份、六铝酸钙180目2~6份、固体树脂粉0~2份,预先用0.5L双螺旋锥形预混器混合15-30分钟,作为预混粉待用;
3)将氧化钙稳定氧化锆和或斜锆石40目20~30份,氧化钙稳定氧化锆和或斜锆石100目20~30份,配预混粉剩余的氧化钙稳定氧化锆和或斜锆石325目,投入到可调速混合造粒机中,一次高速混合2-6分钟,然后加入鳞片石墨5~15份,以及全部预混粉,二次高速混合2-6分钟,最后加入液体树脂为4~8份,三次高速混合2-10分钟,最后出料;
4)混好的泥料,进入到捏合机挤压20-30分钟,将松散的泥料挤压成致密的块状料,之后再将块状料投入到锤式破碎机,破碎后的泥料经过0.6mm振动筛筛分,筛上料重新破碎,筛下料继续进入干燥机或烘干机,边搅拌边加热烘干,烘干温度为50-65℃,20-30分钟;
5)1000-2000公斤的泥料,在成型使用前,在专用均混机中混合15-30分钟,使不同时间生产的泥料均匀稳定;
6)均混好的泥料在固定的温度、湿度下放置12-36小时,即可成型生产。
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