CN112374869A - 一种用于高炉渣铁沟盖板的微膨胀堵缝剂及其制备方法 - Google Patents
一种用于高炉渣铁沟盖板的微膨胀堵缝剂及其制备方法 Download PDFInfo
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Abstract
一种用于高炉渣铁沟盖板的微膨胀堵缝剂,属于不定型耐火材料技术领域,包括以下组分:板状刚玉3‑1mm颗粒10‑15重量份、板状刚玉1‑0mm颗粒10‑15重量份、红柱石3‑1mm颗粒10‑15重量份、红柱石1‑0mm颗粒15‑20重量份、板状刚玉0.2‑0mm粉2‑7重量份、板状刚玉‑325目粉2‑7重量份、氧化铝微粉10‑15重量份、氧化铝超微粉2‑7重量份、蓝晶石‑35目粉2‑7重量份、石英2‑7重量份、增塑剂、缓蚀剂、均化剂、结合剂。该微膨胀堵缝剂用以修补和填缝在盖板和盖板与渣铁钩的接缝处,避免烟气(废气)散出,提高该部位的保温性能。
Description
技术领域
本发明属于不定型耐火材料技术领域,具体涉及一种用于高炉渣铁沟盖板的微膨胀堵缝剂及其制备方法。
背景技术
众所周知,高炉是钢铁冶金的重要场所,而高炉出铁时,渣铁通过铁沟、渣沟流出,渣铁沟及其配套盖板形成的通路是其通过的第一道流程,且为间歇性流过铁水,因此产生废气,空气污染大、温度高、热震频繁是该部位的主要特点,目前在有的高炉主沟、铁沟及渣沟上方已经设置了耐火材料保护盖板,但由于现场铺设位置复杂、个别盖板结构上存在缺陷、盖板使用时间过长而形成变形和裂缝及吊装修补铁沟时可能造成应力损伤导致结构不完整等特殊情况,使盖板产生裂缝及盖板和铁沟之间有缝隙,可能造成高炉的主沟、铁沟、渣沟部位的烟气(废气)散出,不仅对操作人员的身体有较大损害及污染环境,同时由于半封闭状态铁水局部暴露在空气中与冷空气有接触,温度降低快,温度损失大,使钢厂能耗增加。
发明内容
为了解决上述技术问题,本发明提出一种用于高炉渣铁沟盖板的微膨胀堵缝剂及其制备方法,该微膨胀堵缝剂用以修补和填缝在盖板和盖板与渣铁钩的接缝处,避免烟气(废气)散出,提高该部位的保温性能。
本发明采用如下技术方案:
一种用于高炉渣铁沟盖板的微膨胀堵缝剂,所述堵缝剂包括以下组分:板状刚玉3-1mm颗粒10-15重量份、板状刚玉1-0mm颗粒10-15重量份、红柱石3-1mm颗粒10-15重量份、红柱石1-0mm颗粒15-20重量份、板状刚玉0.2-0mm粉2-7重量份、板状刚玉-325目粉2-7重量份、氧化铝微粉10-15重量份、氧化铝超微粉2-7重量份、蓝晶石-35目粉2-7重量份、石英-200目粉2-7重量份、增塑剂1即膨润土 2-7重量份、增塑剂2即磷酸铝 0-4重量份、缓蚀剂1即草酸0-3重量份、缓蚀剂2即磷酸缓蚀剂 0-0.4重量份、均化剂0.005-0.015重量份、结合剂5-10重量份。
进一步地,所述堵缝剂包括如下组分:板状刚玉3-1mm颗粒12-14重量份、板状刚玉1-0mm颗粒11-14重量份、红柱石3-1mm颗粒12-14重量份、红柱石1-0mm颗粒16-18重量份、板状刚玉0.2-0mm粉3-6重量份、板状刚玉-325目粉3-6重量份、氧化铝微粉11-14重量份、氧化铝超微粉3-6重量份、蓝晶石-35目粉3-6重量份、石英-200目粉3-6重量份、增塑剂1即膨润土 3-6重量份、增塑剂2即磷酸铝 1-3重量份、缓蚀剂1即草酸 1-2重量份、缓蚀剂2即磷酸缓蚀剂 0.1-0.3重量份、均化剂0.008-0.012重量份、结合剂6-8重量份。
进一步地,所述堵缝剂由如下组分组成:板状刚玉3-1mm颗粒13重量份、板状刚玉1-0mm颗粒12重量份、红柱石3-1mm颗粒13重量份、红柱石1-0mm颗粒17重量份、板状刚玉0.2-0mm粉5重量份、板状刚玉-325目粉5重量份、氧化铝微粉12重量份、氧化铝超微粉5重量份、蓝晶石-35目粉5重量份、石英-200目粉5重量份、增塑剂1即膨润土 4.5重量份、增塑剂2即磷酸铝 2重量份、缓蚀剂1即草酸 1.5重量份、缓蚀剂2即磷酸缓蚀剂 0.2重量份、均化剂0.01重量份、结合剂6.5重量份。
进一步地,所述均化剂为色素。
进一步地,所述结合剂为85%磷酸。
所述的一种用于高炉渣铁沟盖板的微膨胀堵缝剂的制备方法,先将配方中所有除磷酸外原料依次加入强力搅拌机内,搅拌5分钟后,至材料完全搅拌均匀后加入配方中85%磷酸6.5重量份和水5-10重量份,再搅拌10分钟,取样确定材料可塑性达到要求后下料密封装箱保存。
本发明的优点与效果为:
1、由于该材料物料颗粒选取、结合剂选用和颗粒级配的调配等共同作用,使其永久线变化率体现为微膨胀,这样可保证材料用于该环境内时不会轻易因局部收缩而裂缝剥落,可使其拥有较长使用寿命,较长期有效的起到堵缝作用。
2、热震性能优异,由于材料本身矿物组成、微观结构、物料颗粒等作用,使其具有热膨胀较低、热导率较高、永久线变化率较小等特性,使其在使用过程中随着温度的升高和降低,产生的热应力较小,而材料在使用过程中自身的结构强度较高,可一定程度上抵抗热应力造成的开裂或剥落甚至崩裂,体现出较高抗热震性能,从而使其拥有较长使用寿命,较长期有效的起到堵缝作用。
3、具有一定粘性,由于该材料选用磷酸作为结合剂,使用时拥有一定粘性,可使其在施工过程中牢固附着在待成型表面,结合牢固不易脱落,从而有效的起到堵缝作用,为后续的正常使用打好基础。
4、可塑性优异,该材料配方合理,使其具有较好可塑性,从而使其适用于某些复杂多变的使用部位,起到其应有的作用。
5、施工和使用方便,因材料本身为可塑料,属于气热(硬)性结合材料,因此具有捣打施工、工期短、取之即用、随时甚至带温使用、不需单独烘烤、使用温度条件下即可上强度等特性,使材料更便于施工,避免了因为施工方式和养护方式等因素导致的延误生产等情况发生。
6、节能环保,由于材料本身的各项性能,使其可长期有效的起到堵缝作用,提高该部位保温性能,降低能耗,且可避免烟气(废气)散出对操作人员身体造成损害以及对环境污染,环保。
具体实施方式
下面结合实施例对本发明做进一步解释。
本发明为一种用于高炉渣铁沟盖板的微膨胀堵缝剂,所述堵缝剂包括以下组分:板状刚玉3-1mm颗粒10-15重量份、板状刚玉1-0mm颗粒10-15重量份、红柱石3-1mm颗粒10-15重量份、红柱石1-0mm颗粒15-20重量份、板状刚玉0.2-0mm粉2-7重量份、板状刚玉-325目粉2-7重量份、氧化铝微粉10-15重量份、氧化铝超微粉2-7重量份、蓝晶石-35目粉2-7重量份、石英-200目粉2-7重量份、增塑剂1即膨润土 2-7重量份、增塑剂2即磷酸铝 0-4重量份、缓蚀剂1即草酸 0-3重量份、缓蚀剂2即磷酸缓蚀剂 0-0.4重量份、均化剂0.005-0.015重量份、结合剂5-10重量份。
实施例1
一种用于高炉渣铁沟盖板的微膨胀堵缝剂,所述堵缝剂由如下组分组成:板状刚玉3-1mm颗粒13重量份、板状刚玉1-0mm颗粒12重量份、红柱石3-1mm颗粒13重量份、红柱石1-0mm颗粒17重量份、板状刚玉0.2-0mm粉5重量份、板状刚玉-325目粉5重量份、氧化铝微粉12重量份、氧化铝超微粉5重量份、蓝晶石-35目粉5重量份、石英-200目粉5重量份、增塑剂1即膨润土 4.5重量份、增塑剂2即磷酸铝 2重量份、缓蚀剂1即草酸 1.5重量份、缓蚀剂2即磷酸缓蚀剂 0.2重量份、均化剂0.01重量份、结合剂6.5重量份。所述均化剂为色素;所述结合剂为85%磷酸。
制备方法为:先先将配方中所有除磷酸外原料依次加入强力搅拌机内,搅拌5分钟后,肉眼观察到材料已完全搅拌均匀后加入配方中85%磷酸6.5重量份和水5-10重量份,再搅拌10分钟,在质控人员取样确定材料可塑性达到要求后下料密封装箱保存。
下文从配方中所含某种原料特性角度对该种材料做详细描述:
(1)、该种材料中添加有板状刚玉,其特性由于刚玉晶体结构及离子间键性组成的作用,决定了其具有硬度大、熔点高、化学性稳定等特性,选用该种原料旨在提高材料的低、中、高温强度,提高材料的耐侵蚀性和耐磨性;
(2)、该种材料中添加有红柱石,其特性由于其自身物相组成及加热过程中独特晶型转变的作用,决定了其具有热膨胀系数低、强度高、耐磨、耐侵蚀、热震稳定性优良等特性,选用该种原料旨在提高材料的体积稳定性、热震稳定性、耐磨性;
(3)、该种材料中添加有氧化铝微粉及超微粉,其特性有:a.由于粒度细,尤其是氧化铝超微粉,可较充分填充骨料之间的空隙,起到增加材料的堆积密度、减水等作用,从而提高材料强度;b.同时,由于材料为磷酸结合,增加氧化铝微粉可促磷酸生成复式磷酸盐胶结物相,可进一步提高产品强度;
(4)、该种材料中添加有蓝晶石粉料,其特性是中、高温时,产生膨胀,确保材料在中高温时不收缩(同红柱石),选用该种原料旨在提高材料粉料的体积稳定性、热震稳定性和耐磨性。
(5)、该种材料中添加有石英粉,其特性主要为热膨胀低,选用该种原料旨在进一步提高材料在热膨胀方面的优势,使材料拥有优良的体积稳定性。
(6)、该种材料中添加有两种特殊增塑剂,选用该种原料旨在提高产品的塑性等施工性能,使材料更适用于涂抹或捣打施工。
(7)、该种材料中添加有两种特殊添加剂,选用该种原料旨在保证材料的保质期和施工状态,使材料施工性能更稳定。
(8)、该种材料中添加有特殊均化剂,选用该种原料旨在保证材料在生产和使用过程中的均匀性,保证材料质量。
(9)、该种材料在使用过程中添加磷酸,磷酸作为该种材料的结合剂,其特性为一种气热(硬)性结合剂,材料可在常温自然干燥条件下,凝结硬化并产生强度,随着温度提升,强度提高,选用该种材料作为结合剂旨在便于施工,缩短工期,以更适用于材料在渣铁钩盖板附近的施工和使用。
相关实验及数据
1、实验目的:
比较一种高炉渣铁钩盖的微膨胀堵缝剂和一种低水泥浇注料的施工性能和使用性能,对两种材料各项性能进行数据分析得出结论。
2、实验步骤:
(1)、材料制备。按照指定材料制备方法制备一种高炉渣铁钩盖的微膨胀堵缝剂(以下简称“CM-PT AAT”)和一种低水泥浇注料(以下简称“CM-SHOT 160”)。
(2)、样块制备。按照国标要求,其中材料CM-PT AAT制备使用40mm×40mm×160mm模具捣打成型;材料CM-SHOT 160制备使用40mm×40mm×160mm模具浇注成型。
(3)、性能检测。按照国标要求,对CM-PT AAT进行含水量检测、可塑性检测、分别在110℃×24h、815℃×3h、1000℃×3h和1550℃×3h后的体积密度、常温耐压强度、常温抗折强度和线变化率。具体实验数据如下表1所示。
表1、实验数据整理
(4)、数据分析及结论。从上表1可看出,“CM-PT AAT”相比低水泥浇注料,虽然各温度烧后强度相对较低,但在体积密度方面,尤其永久线变化率上表现出较好效果,一直呈微膨胀状态,说明材料在受热升温和降温过程中体积变化较小,膨胀和收缩产生的应力相对较小,微膨胀也可保证材料不会在使用过程中较快生成裂缝甚至脱落,可保证其较其他材料有较长的使用寿命;且“CM-PT AAT”有较好可塑性能,并因为其生产方法同可塑料,直接捣打施工,使用方便。
Claims (6)
1.一种用于高炉渣铁沟盖板的微膨胀堵缝剂,其特征在于:所述堵缝剂包括以下组分:板状刚玉3-1mm颗粒10-15重量份、板状刚玉1-0mm颗粒10-15重量份、红柱石3-1mm颗粒10-15重量份、红柱石1-0mm颗粒15-20重量份、板状刚玉0.2-0mm粉2-7重量份、板状刚玉-325目粉2-7重量份、氧化铝微粉10-15重量份、氧化铝超微粉2-7重量份、蓝晶石-35目粉2-7重量份、石英-200目粉2-7重量份、增塑剂1即膨润土 2-7重量份、增塑剂2即磷酸铝 0-4重量份、缓蚀剂1即草酸 0-3重量份、缓蚀剂2即磷酸缓蚀剂 0-0.4重量份、均化剂0.005-0.015重量份、结合剂5-10重量份。
2.根据权利要求1所述的一种用于高炉渣铁沟盖板的微膨胀堵缝剂,其特征在于:所述堵缝剂包括如下组分:板状刚玉3-1mm颗粒12-14重量份、板状刚玉1-0mm颗粒11-14重量份、红柱石3-1mm颗粒12-14重量份、红柱石1-0mm颗粒16-18重量份、板状刚玉0.2-0mm粉3-6重量份、板状刚玉-325目粉3-6重量份、氧化铝微粉11-14重量份、氧化铝超微粉3-6重量份、蓝晶石-35目粉3-6重量份、石英-200目粉3-6重量份、增塑剂1即膨润土 3-6重量份、增塑剂2即磷酸铝 1-3重量份、缓蚀剂1即草酸 1-2重量份、缓蚀剂2即磷酸缓蚀剂 0.1-0.3重量份、均化剂0.008-0.012重量份、结合剂6-8重量份。
3.根据权利要求2所述的一种用于高炉渣铁沟盖板的微膨胀堵缝剂,其特征在于:所述堵缝剂由如下组分组成:板状刚玉3-1mm颗粒13重量份、板状刚玉1-0mm颗粒12重量份、红柱石3-1mm颗粒13重量份、红柱石1-0mm颗粒17重量份、板状刚玉0.2-0mm粉5重量份、板状刚玉-325目粉5重量份、氧化铝微粉12重量份、氧化铝超微粉5重量份、蓝晶石-35目粉5重量份、石英-200目粉5重量份、增塑剂1即膨润土 4.5重量份、增塑剂2即磷酸铝 2重量份、缓蚀剂1即草酸 1.5重量份、缓蚀剂2即磷酸缓蚀剂 0.2重量份、均化剂0.01重量份、结合剂6.5重量份。
4.根据权利要求1-3任一所述的一种用于高炉渣铁沟盖板的微膨胀堵缝剂,其特征在于:所述均化剂为色素。
5.根据权利要求1-3任一所述的一种用于高炉渣铁钩盖板的微膨胀堵缝剂,其特征在于:所述结合剂为85%磷酸。
6.根据权利要求1-3任一所述的一种用于高炉渣铁沟盖板的微膨胀堵缝剂的制备方法,其特征在于:先将配方中所有除磷酸外原料依次加入强力搅拌机内,搅拌5分钟后,至材料完全搅拌均匀后加入配方中85%磷酸6.5重量份和水5-10重量份,再搅拌10分钟,取样确定材料可塑性达到要求后下料密封装箱保存。
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