CN114736027B - 铁水包衬用防粘渣涂抹料及其制备方法 - Google Patents
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Abstract
本发明公开了一种铁水包衬用防粘渣涂抹料,包括有硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土、防爆纤维、结合剂和功能添加剂;所述功能添加剂为多元醇;本发明的有益效果是:本发明制备的涂抹料易涂抹、不爆裂、不起泡,涂抹后包壁光滑,浇包日常维护时包壁粘渣易分离清理,有效保护了铁水包炉衬,大大提高了炉衬料的使用寿命,同时降低了铁水包耐火材料使用成本。
Description
技术领域
本发明涉及耐火材料技术领域,特别是一种铁水包衬用防粘渣涂抹料及其制备方法。
背景技术
铸造铁水包一般是由Al2O3-SIC-C系列浇注料、捣打料作为炉衬,虽然现有技术炉衬料使用寿命已达到600炉次以上,但炉前铁水包出铁后包壁、包底都有不同程度上挂渣、粘渣现象。日常维护中清渣使用钢纤剔除时,容易过度损坏工作衬,若清渣不彻底,再循环使用后包壁粘渣会逐渐增厚,铁水包的有效容积相继减小,降低了生产效率,也降低了铁水纯净度等问题。
丙三醇和废蜜糖中均含有多元醇,丙三醇是无色味甜澄明黏稠液体。无臭。有暖甜味。俗称甘油,能从空气中吸收潮气,也能吸收硫化氢、氰化氢和二氧化硫,丙三醇常用作溶剂,润滑剂,药剂和甜味剂。废蜜糖是制糖煮炼过程中糖浆经过多次结晶,离心分离晶粒后的丹液,废蜜糖含有50%左右的全糖分。废蜜糖主要用作肥料、饲料、酒精、酵母、柠檬酸的制备工艺。丙三醇遇明火、高热可燃,因此丙三醇并不常用于铸造铁水包的炉衬料中,而废蜜糖也不常见与耐火材料中。
发明内容
本发明的目的在于克服现有技术的缺点,提供一种铁水包衬用防粘渣涂抹料及其制备方法。
本发明的目的通过以下技术方案来实现:
一种铁水包衬用防粘渣涂抹料,包括有硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土、防爆纤维、结合剂和剂;所述功能添加剂为多元醇和废蜜糖中的一种或两种;
优选的,按照重量份数,包括有50-55份的硅石骨料、5-10份的硅石粉料、15-25份的石墨粉、3-5份的氧化铝超微粉、8-15份的黏土、0.1-0.6份的防爆纤维、20-30份的结合剂和1-3份的功能添加剂;
优选的,所述多元醇包括丙三醇;
优选的,所述功能添加剂为丙三醇和废蜜糖;且丙三醇和废蜜糖的质量比为1:1-5;
优选的,所述硅石骨料的粒度为0.1-3.0mm;所述硅石粉料的粒度为0.01-0.08mm;所述硅石骨料和硅石粉料中的硅含量≥96%;
优选的,所述石墨粉的粒度为0.01-0.09mm;所述石墨粉中的碳含量≥85%;
优选的,所述氧化铝超微粉的粒度<1um;
优选的,所述黏土中铝含量≥30%;所述黏土为广西白泥或密县黏土;
优选的,所述结合剂为浓度为1.15-1.25mol/L的硫酸铝溶液。
本发明还提供一种铁水包衬用防粘渣涂抹料的制备方法,包括有如下步骤:
1)将硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土和防爆纤维混合均匀;
2)加入结合剂在强制搅拌机内搅拌3-5min;
3)加入功能添加剂混炼1-3min;
4)分装密封包装。
本发明具有以下优点:
1、本发明制备的防粘渣涂抹料保存时间长,密封可保存8个月;
2、本发明制备的涂抹料易涂抹、不爆裂、不起泡,涂抹后包壁光滑,浇包日常维护时包壁粘渣易分离清理,有效保护了铁水包炉衬,大大提高了炉衬料的使用寿命,同时降低了铁水包耐火材料使用成本;
3、将本发明涂抹在钢包内衬表面的粘附率达到98%,能够使用20余次;
4、本发明的防粘渣涂料中使用硅石骨料和硅石粉作为基础骨料,通过两种不同粒径的硅石料配合,有利于使得防粘涂抹料具有良好的力学性能,同时硅石料具有较强的稳定性,能够抗高温,增强抗侵蚀性能;另外,硅石料中的二氧化硅含有毛细孔,受热后表面迅速膨胀、扩散,能对浮渣产生吸附作用,能够与碱性氧化物或某些金属的碳酸盐共熔,生成硅酸盐,有利于除去杂质元素的同时形成致密的保温层,起到保温效果;硅石料和防粘渣涂料中的其他组分共同作用,形成脆性适宜的且位于涂料表层的粘渣层,使得附着在包壁上的粘渣便于清理,且清理后能够继续使用,涂抹后可以使用20次;
5、本发明的防粘渣涂料中使用石墨粉,石墨粉具有较好的润滑作用,使得粘渣能够便于脱去,有利于避免清渣时难以脱下导致对炉壁的损伤;同时石墨粉料中有较高的孔隙率,有利于吸附硫等杂质;
6、本发明的防粘渣涂料中使用氧化铝,氧化铝的硬度和熔点较高,有利于提高防粘渣涂料的整体性能和稳定性,有利于保护包壁;
7、本发明的防粘渣涂料中使用黏土,且优选广西白泥或密县黏土,即具有良好的耐热性能,不易开裂气泡,同时黏土和其他组分稳定结合后,使得防粘渣涂料具有良好的可塑性,便于涂抹在包壁上;黏土在高温环境下发生转化,有利于增强硬度和耐压强度;
8、本发明的防爆纤维与其他组分混合均匀后,能够在一定的高温下发生软化、收缩、熔化,而在功能添加剂等组分的存在下,能够避免进一步碳化,最后能够与粘渣一起便于脱下,避免了粘渣清理不便的问题;
9、本发明使用功能添加剂,功能添加剂中的多元醇和废蜜糖均能够锁住水分,有利于防粘渣涂抹料的长期保存,本发明的防粘渣涂抹料能够保持8个月以上;
10、本发明优选使用多元醇和废蜜糖作为功能添加剂,其中,多元醇中的羟基能够和水分子结合,高温下位于防粘渣涂料最表层的涂料坍塌,形成具有多孔隙率的吸附材料,粘渣能够附着在涂料表层将孔隙堵住,避免粘渣进一步渗入涂料内侧,同时涂料中氧化铝超微粉、硅石等组分的存在,有利于起到阻隔作用,粘渣不能进一步渗入涂料;使用一次后,将表层的涂料和粘渣一起清理,内层的多元醇和废蜜糖再次露出,在下一次使用时继续起到吸附粘渣的作用;本发明优选的功能添加剂为丙三醇和废蜜糖,其中丙三醇的羟基有利于和水结合,起到保湿保水作用,有利于延长防粘渣涂料的密封保存周期;废蜜糖中全糖的羟基有利于和水结合,起到保湿保水作用,而废蜜糖的特性是无法在高温下再结晶,其中的糖化物在高温下焦化,具有脆性,在清理时能够和粘渣一起快速脱去,有利于避免损伤包壁。
具体实施方式
为使本发明实施方式的目的、技术方案和优点更加清楚,下面将结合本发明实施方式,对本发明实施方式中的技术方案进行清楚、完整地描述,显然,所描述的实施方式是本发明一部分实施方式,而不是全部的实施方式。
因此,以下对本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围,而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。
需要说明的是,在不冲突的情况下,本发明中的实施方式及实施方式中的特征可以相互组合。
实施例1:一种铁水包衬用防粘渣涂抹料,包括有硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土、防爆纤维、结合剂和功能添加剂;所述功能添加剂包括有多元醇和废蜜糖中的一种或两种;
按照重量份数,包括有50-55份的硅石骨料、5-10份的硅石粉料、15-25份的石墨粉、3-5份的氧化铝超微粉、8-15份的黏土、0.1-0.6份的防爆纤维、20-30份的结合剂和1-3份的功能添加剂;
所述多元醇包括有丙三醇;
所述功能添加剂为丙三醇和废蜜糖;且丙三醇和废蜜糖的质量比为1:1-5;
所述硅石骨料的粒度为0.1-3.0mm;所述硅石粉料的粒度为0.01-0.08mm;所述硅石骨料和硅石粉料中的硅含量≥96%;
所述石墨粉的粒度为0.01-0.09mm;所述石墨粉中的碳含量≥85%;
所述氧化铝超微粉的粒度<1um;
所述黏土中铝含量≥30%;所述黏土为广西白泥或密县黏土;
所述结合剂为浓度为1.15-1.25mol/L的硫酸铝溶液。
上述铁水包衬用防粘渣涂抹料采用如下制备方法,包括有如下步骤:
1)将硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土和防爆纤维混合均匀;
2)加入结合剂在强制搅拌机内搅拌3-5min;
3)加入功能添加剂混炼1-3min;
4)分装密封包装。
实施例2:一种铁水包衬用防粘渣涂抹料,包括有硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土、防爆纤维、结合剂和功能添加剂;所述功能添加剂包括有多元醇和废蜜糖中的一种或两种;
按照重量份数,包括有50份的硅石骨料、5份的硅石粉料、15份的石墨粉、3份的氧化铝超微粉、8份的黏土、0.1份的防爆纤维、20份的结合剂和1份的功能添加剂;
所述多元醇包括有丙三醇;
所述硅石骨料的粒度为0.1mm;所述硅石粉料的粒度为0.01mm;所述硅石骨料和硅石粉料中的硅含量≥96%;
所述石墨粉的粒度为0.01mm;所述石墨粉中的碳含量≥85%;
所述氧化铝超微粉的粒度<1um;
所述黏土中铝含量≥30%;所述黏土为广西白泥或密县黏土;
所述结合剂为浓度为1.15mol/L的硫酸铝溶液。
上述铁水包衬用防粘渣涂抹料采用如下制备方法,包括有如下步骤:
1)将硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土和防爆纤维混合均匀;
2)加入结合剂在强制搅拌机内搅拌3min;
3)加入功能添加剂混炼1min;
4)分装密封包装。
实施例3:一种铁水包衬用防粘渣涂抹料,包括有硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土、防爆纤维、结合剂和功能添加剂;所述功能添加剂包括有多元醇和废蜜糖中的一种或两种;
按照重量份数,包括有55份的硅石骨料、10份的硅石粉料、25份的石墨粉、5份的氧化铝超微粉、15份的黏土、0.6份的防爆纤维、30份的结合剂和3份的功能添加剂;
所述多元醇包括有丙三醇;
所述硅石骨料的粒度为3.0mm;所述硅石粉料的粒度为0.08mm;所述硅石骨料和硅石粉料中的硅含量≥96%;
所述石墨粉的粒度为0.09mm;所述石墨粉中的碳含量≥85%;
所述氧化铝超微粉的粒度<1um;
所述黏土中铝含量≥30%;所述黏土为广西白泥或密县黏土;
所述结合剂为浓度为1.25mol/L的硫酸铝溶液。
上述铁水包衬用防粘渣涂抹料采用如下制备方法,包括有如下步骤:
1)将硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土和防爆纤维混合均匀;
2)加入结合剂在强制搅拌机内搅拌5min;
3)加入功能添加剂混炼3min;
4)分装密封包装。
实施例4:一种铁水包衬用防粘渣涂抹料,包括有硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土、防爆纤维、结合剂和功能添加剂;所述功能添加剂包括有多元醇和废蜜糖中的一种或两种;
按照重量份数,包括有52份的硅石骨料、8份的硅石粉料、20份的石墨粉、4份的氧化铝超微粉、12份的黏土、0.4份的防爆纤维、25份的结合剂和2份的功能添加剂;
所述多元醇包括有丙三醇;
所述硅石骨料的粒度为3mm;所述硅石粉料的粒度为0.074mm;所述硅石骨料和硅石粉料中的硅含量≥96%;
所述石墨粉的粒度为0.088mm;所述石墨粉中的碳含量≥85%;
所述氧化铝超微粉的粒度<1um;
所述黏土中铝含量≥30%;所述黏土为广西白泥或密县黏土;
所述结合剂为浓度为1.00 mol/L的硫酸铝溶液。
上述铁水包衬用防粘渣涂抹料采用如下制备方法,包括有如下步骤:
1)将硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土和防爆纤维混合均匀;
2)加入结合剂在强制搅拌机内搅拌4min;
3)加入功能添加剂混炼2min;
4)分装密封包装。
实施例5:采用和实施例4相同的方法制备铁水包衬用防粘渣涂抹料,区别仅仅在于功能添加剂使用丙三醇。丙三醇的端羟基有利于和水结合,起到保湿保水作用,高温下位于防粘渣涂料最表层的涂料坍塌,形成具有多孔隙率的吸附材料,粘渣能够附着在涂料表层将孔隙堵住,避免粘渣进一步渗入涂料内侧,同时涂料中氧化铝超微粉、硅石等组分的存在,有利于起到阻隔作用,粘渣不能进一步渗入涂料;使用一次后,将表层的涂料和粘渣一起清理,内层的多元醇和废蜜糖再次露出,在下一次使用时进一步起到吸附粘渣的作用。
实施例6:采用和实施例4相同的方法制备铁水包衬用防粘渣涂抹料,区别仅仅在于功能添加剂使用废蜜糖。废蜜糖中的全糖中的羟基有利于和水结合,起到保湿保水作用,而废蜜糖不再结晶,其中的糖化物在高温下焦化,具有脆性,在清理时能够和粘渣一起快速脱去,有利于提高清理粘渣的便利性,有利于避免损伤包壁。
实施例7:采用和实施例4相同的方法制备铁水包衬用防粘渣涂抹料,区别仅仅在于功能添加剂使用丙三醇和废蜜糖,且丙三醇和废蜜糖的质量比为1:1。本实施例中,废蜜糖和丙三醇按照一比一的比例添加使用,有利于
实施例8:采用和实施例4相同的方法制备铁水包衬用防粘渣涂抹料,区别仅仅在于功能添加剂使用丙三醇和废蜜糖,且丙三醇和废蜜糖的质量比为1:5。
实施例9:采用和实施例4相同的方法制备铁水包衬用防粘渣涂抹料,区别仅仅在于功能添加剂使用丙三醇和废蜜糖,且丙三醇和废蜜糖的质量比为1:3。
对比例1:采用和实施例4相同的方法制备铁水包衬用防粘渣涂抹料,区别仅仅在于不使用功能添加剂。
实施例5-9和对比例1的实测指标如下表1所示。
表1 实施例5、6、9、对比例1的实测指标结果。
其中,粘渣去除率为:刮下粘渣区域的面积)/附着有粘渣区域的面积×100%。
根据表1的结果可知,使用功能添加剂后,粘渣去除率明显大于不使用功能添加剂的防粘渣涂抹料;且功能添加剂选仅仅选用丙三醇或仅仅选用废蜜糖时的粘渣去除率,相比较于配合使用两种功能添加剂的粘渣去除率差,这可能是由于丙三醇和废蜜糖能够发挥一定的协同作用,使得粘渣附着在涂抹料表面后形成具有适宜脆性的表层,使用一次后便于清理。另外,在100℃下,功能添加的坍塌和脆化尚未完成,因此渣料清理不便,清渣时有大量区域渣料难以除去;本发明实施例5-9制备得到的防粘渣涂抹料在耐压强度和体积密度上均能够达到要求,能够有利于保护包壁。
尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各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,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (3)
1.一种铁水包衬用防粘渣涂抹料,其特征在于,按照重量份数,包括有50-55份的硅石骨料、5-10份的硅石粉料、15-25份的石墨粉、3-5份的氧化铝超微粉、8-15份的黏土、0.1-0.6份的防爆纤维、20-30份的结合剂和1-3份的功能添加剂;所述功能添加剂为丙三醇和废蜜糖;且丙三醇和废蜜糖的质量比为1:1-5;
所述硅石骨料的粒度为0.1-3.0mm;所述硅石粉料的粒度为0.01-0.08mm;所述硅石骨料和硅石粉料中的硅含量≥96%;
所述石墨粉的粒度为0.01-0.09mm;所述石墨粉中的碳含量≥85%;
所述氧化铝超微粉的粒度<1μm;
所述结合剂为浓度为1.15-1.25mol/L的硫酸铝溶液。
2.根据权利要求1所述的铁水包衬用防粘渣涂抹料,其特征在于,所述黏土中铝含量≥30%;所述黏土为广西白泥或密县黏土。
3.一种权利要求1或2所述的铁水包衬用防粘渣涂抹料的制备方法,其特征在于,包括有如下步骤:
1)将硅石骨料、硅石粉料、石墨粉、氧化铝超微粉、黏土和防爆纤维混合均匀;
2)加入结合剂在强制搅拌机内搅拌3-5min;
3)加入功能添加剂混炼1-3min;
4)分装密封包装。
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