CN106588053A - 用于高炉渣沟流嘴的浇注料 - Google Patents
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Abstract
本发明公开了涉及浇注料,尤其是一种用于高炉渣沟流嘴的浇注料。用于高炉渣沟流嘴的浇注料,以重量份数计,它是由下述原料混合而成:粒径为5~10mm的刚玉炉渣31~33份,粒径为2~5mm的刚玉炉渣45~55份,粒径为0.045~2mm的刚玉炉渣15~28份,粒径为小于0.045mm的刚玉炉渣10~15份,氧化铝4~6份,碳化硅2~4份,耐热钢纤维4~5份,减水剂0.05~0.15份。本发明提供一种成本低、使用寿命长的用于高炉渣沟流嘴的浇注料。
Description
技术领域
本发明涉及浇注料,尤其是一种用于高炉渣沟流嘴的浇注料。
背景技术
国内大中型高炉渣沟流嘴用耐火材料一般要求是:耐高温、耐侵蚀、耐冲刷、抗渗透、高导热性特别是耐高温性能要求极高。大中型高炉渣沟流嘴耐火材料主要是Al2O3-SiC质浇注料,其原料以刚玉和碳化硅为主,价格较高,刚玉价格为每吨3000-6000元。
铝热法是国内生产钒铁的主要方法,用铝热法生产高钒铁已有成熟工艺,在生产过程中的附产物为刚玉炉渣,目前仅限于二次提取残钒和替代少量铝矾土生产合金,存在着利用量少,综合利用价值不高等缺点。
刚玉炉渣价格低廉,以Al2O3和MgO为主要成分,Al2O3含量大于70%,MgO10%-15%,CaO含量为8%-10%,其它为杂质成分,其中对耐火材料有害的杂质Fe2O3含量在2.0%以下,Na2O+K2O含量在0.5%以下,研究发现,刚玉炉渣可有效取代一般刚玉作为主要原料生产浇注料。
专利CN201110453234.8公开了一种高炉出铁沟耐火材料浇注料,其由下述重量配比组分组成:5-10mm的刚玉炉渣25-50份;2-5mm的刚玉炉渣15-35份,0-2mm的刚玉炉渣5-15份;碳化硅粉5-15份;氧化铝水泥或铝酸钙水泥1-5份;添加剂0.1-0.3份。在实际生产中,该浇注料的使用寿命仅有10-15天,使用寿命低,频繁更换浇注料导致生产成本偏高、工作量过大。
发明内容
本发明所要解决的技术问题是提供一种成本低、使用寿命长的用于高炉渣沟流嘴的浇注料。
本发明解决其技术问题所采用的用于高炉渣沟流嘴的浇注料,以重量份数计,它是由下述原料混合而成:粒径为5~10mm的刚玉炉渣31~33份,粒径为2~5mm的刚玉炉渣45~55份,粒径为0.045~2mm的刚玉炉渣15~28份,粒径为小于0.045mm的刚玉炉渣10~15份,氧化铝4~6份,碳化硅2~4份,耐热钢纤维4~5份,减水剂0.05~0.15份,其中,刚玉炉渣的化学成分按重量百分比计为Al2O3≥75%、MgO11~14%、CaO8~10%、Fe2O3≤1%。
进一步的是,所述减水剂为三聚磷酸钠或者六偏磷酸钠。
进一步的是,所述氧化铝为活性氧化铝。
进一步的是,所述氧化铝粒径小于或者等于200目。
本发明的有益效果是:通过采用刚玉炉渣代替刚玉作为制备高炉渣沟流嘴浇注料的主要材料,有效地降低了成本,不同质量分数和不同粒径的刚玉炉渣,特别是粒径为2~5mm的刚玉炉渣,比重最重,其作为基料使用,一方面起到骨架支撑的作用,另一方面起到填充料的作用,使所制备的高炉渣沟流嘴浇注料填充密实,提高其性能(抗压、强度、耐高温),提高使用效果;本发明所制备的高炉渣沟流嘴浇注料含有耐热钢纤维,不但使碳化硅的加入量显著减少,降低成本,而且提升了所制备的高炉渣沟流嘴浇注料的强度和耐高温的性能,显著提高了其使用寿命(至少35天),也进一步降低生产成本。
具体实施方式
本发明用于高炉渣沟流嘴的浇注料,以重量份数计,它是由下述原料混合而成:粒径为5~10mm的刚玉炉渣31~33份,粒径为2~5mm的刚玉炉渣45~55份,粒径为0.045~2mm的刚玉炉渣15~28份,粒径为小于0.045mm的刚玉炉渣10~15份,氧化铝4~6份,碳化硅2~4份,耐热钢纤维4~5份,减水剂0.05~0.15份,其中,刚玉炉渣的化学成分按重量百分比计为Al2O3≥75%、MgO11~14%、CaO8~10%、Fe2O3≤1%。
其中粒径为5~10mm的刚玉炉渣作为骨料使用,在所制备的高炉渣沟流嘴浇注料中起到骨架支撑的作用;粒径为2~5mm的刚玉炉渣作为基料使用,一方面起到骨架支撑的作用,另一方面起到填充料的作用,增强了抗压、强度、耐高温的性能;粒径为0.045~2mm的刚玉炉渣作为填充料使用,填充骨料和基料之间的缝隙,使整个浇注料填充密实,无缝隙;粒径为小于0.045mm的刚玉炉渣作为结合剂和填充料使用,一方面将所有原料紧密的结合起来,另一方面作为填充料使用;减水剂用于提高所制备的高炉渣沟流嘴浇注料的硬化速度和强度,防止浇注料收缩开裂,减水剂优选为三聚磷酸钠或者六偏磷酸钠;氧化铝有利于提升浇注料耐高温、抗侵蚀性,为使浇注料性能平均,氧化铝优选粒度≤200目,由于活性氧化铝的反应活性更强,使用效果更佳,所述氧化铝优选采用活性氧化铝;耐热钢纤维代替碳化硅,不但降低成本,而且提升了所制备的高炉渣沟流嘴浇注料的强度和耐高温的性能。
本发明高炉渣沟流嘴浇注料是先将上述各种原料按所述的比例进行配料,然后再搅拌机里搅拌后并包装;使用时再加水搅拌,加水量占总搅拌质量的9-10%,将搅拌混合好的物料装入渣沟流嘴的模具中,通过振动棒给浇注料施加振动,经自然硬化干燥并脱模后得到高炉渣沟流嘴浇注料。通过采用刚玉炉渣代替刚玉作为制备高炉渣沟流嘴浇注料的主要材料,有效地降低了成本,不同质量分数和不同粒径的刚玉炉渣,所制备的高炉渣沟流嘴浇注料填充密实,提高其性能(抗压、强度、耐高温),提高使用效果;所制备的高炉渣沟流嘴浇注料含有耐热钢纤维,不但使碳化硅的加入量显著减少,降低成本(耐热钢纤维的成本比碳化硅的成本低),而且提升了所制备的高炉渣沟流嘴浇注料的强度和耐高温的性能,从而提高了其使用寿命,在实践中得出,使用时间至少35天,显著提高了高炉渣沟流嘴浇注料的使用寿命,也进一步降低生产成本。
实施例1
选取刚玉炉渣,刚玉炉渣的化学成分按重量百分比计为Al2O3≥75%、MgO11~14%、CaO8~10%、Fe2O3≤1%。
按照表一配合比准备原料
表一
将上述各种原料按表一配合比配料,然后在搅拌机中搅拌装袋,使用时,再加水搅拌5分钟以上;搅拌混合好的物料倒入渣沟流嘴浇注的模具中,通过振动棒给浇注料施加振动达到流动成型的目的;该浇注料经自然硬化干燥后脱模,经现场温度条件下自然烘干6小时投入使用。
检测所得浇注料性能:110℃体积密度大于2.6g/cm3,110℃烘干耐压强度大于22Mpa,1100℃条件下保温3小时后耐压强度大于55Mpa;110℃烘干抗折强度大于5Mpa,1100℃条件下保温3小时后抗折强度大于10Mpa,满足高炉渣沟流嘴的浇注料的使用要求,且抗压、强度、耐高温的性能增强,将所得浇注料作为炼铁渣沟流嘴浇注料使用,使用寿命达37天。
实施例2
选取刚玉炉渣,刚玉炉渣的化学成分按重量百分比计为Al2O3≥75%、MgO11~14%、CaO8~10%、Fe2O3≤1%。
按照表二配合比准备原料
表二
将上述各种原料按表二配合比配料,然后在搅拌机中搅拌装袋,使用时,再加水搅拌5分钟以上;搅拌混合好的物料倒入渣沟流嘴浇注的模具中,通过振动棒给浇注料施加振动达到流动成型的目的;该浇注料经自然硬化干燥后脱模,经现场温度条件下自然烘干6小时投入使用。
检测所得浇注料性能:110℃体积密度大于2.8g/cm3,110℃烘干耐压强度大于27Mpa,1100℃条件下保温3小时后耐压强度大于65Mpa;110℃烘干抗折强度大于6Mpa,1100℃条件下保温3小时后抗折强度大于12Mpa,满足高炉渣沟流嘴的浇注料的使用要求,抗压、强度、耐高温的性能增强,使用寿命达42天。
实施例3
选取刚玉炉渣,刚玉炉渣的化学成分按重量百分比计为Al2O3≥75%、MgO11~14%、CaO8~10%、Fe2O3≤1%。
按照表三配合比准备原料
表三
将上述各种原料按表三配合比配料,然后在搅拌机中搅拌装袋,使用时,再加水搅拌5分钟以上;搅拌混合好的物料倒入渣沟流嘴浇注的模具中,通过振动棒给浇注料施加振动达到流动成型的目的;该浇注料经自然硬化干燥后脱模,经现场温度条件下自然烘干6小时投入使用。
检测所得浇注料性能:110℃体积密度大于2.7g/cm3,110℃烘干耐压强度大于25Mpa,1100℃条件下保温3小时后耐压强度大于60Mpa;110℃烘干抗折强度大于7Mpa,1100℃条件下保温3小时后抗折强度大于11Mpa,满足高炉渣沟流嘴的浇注料的使用要求,将所得浇注料作为炼铁渣沟流嘴浇注料使用,使用寿命达39天。
实施例4
选取刚玉炉渣,刚玉炉渣的化学成分按重量百分比计为Al2O3≥75%、MgO11~14%、CaO8~10%、Fe2O3≤1%。
按照表四配合比准备原料
表四
将上述各种原料按表四配合比配料,然后在搅拌机中搅拌装袋,使用时,再加水搅拌5分钟以上;搅拌混合好的物料倒入渣沟流嘴浇注的模具中,通过振动棒给浇注料施加振动达到流动成型的目的;该浇注料经自然硬化干燥后脱模,经现场温度条件下自然烘干6小时投入使用。
检测所得浇注料性能:110℃体积密度大于2.9g/cm3,110℃烘干耐压强度大于22Mpa,1100℃条件下保温3小时后耐压强度大于58Mpa;110℃烘干抗折强度大于6Mpa,1100℃条件下保温3小时后抗折强度大于13Mpa,满足高炉渣沟流嘴的浇注料的使用要求,将所得浇注料作为炼铁渣沟流嘴浇注料使用,使用寿命达38天。
Claims (4)
1.用于高炉渣沟流嘴的浇注料,其特征在于:以重量份数计,它是由下述原料混合而成:粒径为5~10mm的刚玉炉渣31~33份,粒径为2~5mm的刚玉炉渣45~55份,粒径为0.045~2mm的刚玉炉渣15~28份,粒径为小于0.045mm的刚玉炉渣10~15份,氧化铝4~6份,碳化硅2~4份,耐热钢纤维4~5份,减水剂0.05~0.15份,其中,刚玉炉渣的化学成分按重量百分比计为Al2O3≥75%、MgO11~14%、CaO8~10%、Fe2O3≤1%。
2.如权利要求1所述的用于高炉渣沟流嘴的浇注料,其特征在于:所述减水剂为三聚磷酸钠或者六偏磷酸钠。
3.如权利要求1所述的用于高炉渣沟流嘴的浇注料,其特征在于:所述氧化铝为活性氧化铝。
4.如权利要求3所述的用于高炉渣沟流嘴的浇注料,其特征在于:所述氧化铝粒径小于或者等于200目。
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