CN115057712A - 一种高炉炮泥及制备方法 - Google Patents
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Abstract
本发明公开了一种高炉炮泥,包含有如下组分的原料:焦炭:15%‑25%;粘土质6%‑10%;氮化硅铁40%‑60%;石墨6%‑10%;高纯碳微粉15%‑25%;涂覆剂和钝化剂。结合本发明公开的制备方法,获得了一种具备第吸油率、开口强度适中、性能稳定、耐侵蚀耐冲刷的高炉炮泥,达到提高高炉炮泥的耐用性、保证了开口强度、提升了抗侵蚀耐冲刷性能和延长出铁时间的目的。
Description
技术领域
本发明属于高温新材料技术领域,具体涉及一种高炉炮泥及其制备方法。
背景技术
现有技术中,就高炉(含熔融还原炉及矿热炉等竖炉)稳定操作来讲,堵塞出铁(渣)孔用的炮泥性能至关重要,目前高炉向大型化、高风温、富氧、喷煤、高冶炼强度、减排环保方向发展,对炮泥的性能要求越来越苛刻,不仅要求长时间出铁、铁口深度稳定,有利于保护出铁口附近的炉墙,更要求不漏不断不喷溅,以期达到高炉高效、稳产顺行、环保、长寿。
目前炮泥结合剂主流仍是焦油、沥青或者改性树脂,为了打泥顺畅必须添加适当比例具有粘性的含碳结合剂,结合剂含有挥发分,而且在150℃以内温度越高粘性越低,结合剂加多了炮泥太软,烧结太慢堵不住口容易冒泥跑泥出现安全事故,结合剂加少了炮泥太硬打不进泥也会出现安全事故。
公开于该背景技术部分的信息仅仅旨在加深对本发明的总体背景技术的理解,而不应当被视为承认或以任何形式暗示该信息构成已为本领域技术人员所公知的现有技术。
发明内容
为解决上述技术问题,本发明提出了一种高炉炮泥及制备方法,以达到提高高炉炮泥的耐用性、保证了开口强度、提升了抗侵蚀耐冲刷性能和延长出铁时间的目的。
为达到上述目的,本发明的技术方案如下:
一种高炉炮泥,包含有如下组分的原料:
焦炭:15%-25%;粘土质6%-10%;氮化硅铁40%-60%;石墨6%-10%、;高纯碳微粉15%-25%;涂覆剂和钝化剂。
作为优选的,所述涂覆剂为醇类物质,所述涂覆剂可为粘度适中的乙二醇、聚乙二醇、甘醇中的一种或二种以上以任意配比混合形成;所述涂覆剂的添加比例为0.1-1%。通过涂覆剂来封堵原料表面气孔,降低原料的吸油率以及气孔率。
作为优选的,所述钝化剂为有机硅烷,所述钝化剂为甲基硅油、二甲基硅油、改性硅油等一种或者二种以上以任意配合混合而成;所述钝化剂的添加比例0.1-1.0%。通过钝化剂来改善粉料的润滑性、流动性,降低结合剂添加量,同时在高温下对炮泥产品具有消泡和透气作用,减少炮泥高温体积膨胀和爆裂,提高了高炉炮泥的性能。
作为优选的,所述后料为低气孔率、高致密的颗粒料或者是低气孔率、高致密的粉料;所述后料包含有碳化硅15%-20%、刚玉15%-20%、矾土20%-40%和腊石20%-50%
作为优选的,所述焦炭为高吸油率、高气孔率。
作为优选的,所述焦炭为颗粒料,所述焦炭的直径不低于0.075mm;所述黏土质、氮化硅铁、石墨和高纯碳粉为粉料,所述黏土质、氮化硅铁、石墨和高纯碳粉的直径低于0.075mm;
所述焦炭的气孔率为40-45。
一种高炉炮泥的制备方法,其制备步骤具体如下:
(1)、对原料进行选料,具体如下:焦炭3-0mm、氮化硅铁200目、粘土200目、绢云母200目、石墨粉200目、高纯碳微粉5-300纳米及其他高气孔率、高吸油率炮泥原料100份;
(2)、将原料进行预混、搅拌5-10min;
(3)、将涂覆剂用雾化喷雾器向预混料中均匀喷洒,并搅拌5-10min;其中涂覆剂的添加量为预处理里料的0.1-1.0%;
(4)、将钝化剂滴入到预处理料中,并搅拌5-10min;其中钝化剂的添加量为预处理里料的0.1-1.0%;
(5)、向经过步骤(4)加工后的混合料中加入由刚玉、铝矾土、碳化硅、叶腊石、金属粉等骨料组成的混合料,并添加适当比例的有机结合剂,经混炼轮碾充分后,检测炮泥马夏值,合格后出料包装。
本发明具有如下优点:
1.本发明提供了一种高炉炮泥及制备方法,获得了一种具备第吸油率、开口强度适中、性能稳定、耐侵蚀耐冲刷的高炉炮泥,达到提高高炉炮泥的耐用性、保证了开口强度、提升了抗侵蚀耐冲刷性能和延长出铁时间的目的。
2.本发明通过涂覆剂来封堵原料表面气孔,降低原料的吸油率以及气孔率。
3.本发明通过钝化剂来改善粉料的润滑性、流动性,降低结合剂添加量,同时在高温下对炮泥产品具有消泡和透气作用,减少炮泥高温体积膨胀和爆裂,提高了高炉炮泥的性能。
具体实施方式
下面对本发明实施例中的技术方案进行清楚、完整地描述。
本发明提供了一种高炉炮泥及制备方法,其工作原理是提供一种具备第吸油率、开口强度适中、性能稳定、耐侵蚀耐冲刷的高炉炮泥,达到提高高炉炮泥的耐用性、保证了开口强度、提升了抗侵蚀耐冲刷性能和延长出铁时间的目的。
下面结合实施例和具体实施方式对本发明作进一步详细的说明。
一种高炉炮泥,包含有如下组分:包含有1:1原料和后料:
原料组分如下:焦炭:15%-25%;粘土质6%-10%;氮化硅铁40%-60%;石墨6%-10%、;高纯碳微粉15%-25%;涂覆剂和钝化剂。
其中:
所述涂覆剂乙二醇,且乙二醇的添加比例为0.5%。
所述钝化剂为甲基硅油,所述甲基硅油的添加比例0.5%。
所述后料为低气孔率、高致密的颗粒料。后料包含有碳化硅15%-20%、刚玉15%-20%、矾土20%-40%和腊石20%-50%。
一种高炉炮泥的制备方法,其制备步骤具体如下:
(1)、对原料进行选料,具体如下:焦炭3-0mm、氮化硅铁200目、粘土200目、绢云母200目、石墨粉200目、高纯碳微粉5-300纳米及其他高气孔率、高吸油率炮泥原料100份;
(2)、将原料进行预混、搅拌5-10min;
(3)、将涂覆剂用雾化喷雾器向预混料中均匀喷洒,并搅拌5-10min;其中涂覆剂的添加量为预处理里料的0.1-1.0%,通过涂覆实现对物料表面的气孔进行封堵;
(4)、将钝化剂滴入到预处理料中,并搅拌5-10min;其中钝化剂的添加量为预处理里料的0.1-1.0%;钝化剂的加入用于改善预处理料的润滑性、流动性,以期达到减少有机结合剂的目的
(5)、向经过步骤(4)加工后的混合料中加入由刚玉、铝矾土、碳化硅、叶腊石、金属粉等骨料组成的混合料,并添加机结合剂(有机结合剂与物料的12-20%;有机结合剂的作用就是起到粘结、润滑、增加碳结合强度,满足现场泥炮机顺畅打泥;有机结合剂:是指含有碳氢复杂高分子化合物,一般指煤焦油、沥青、石油沥青、天然沥青、专用清漆型酚醛树脂、改性树脂或者复合沥青树脂等),经混炼轮碾充分后,检测炮泥马夏值(马夏值是指炮泥在专有设备单位面积通过行程一定距离抵抗压强的数值,单位:Mpa,这个值是小于等于现场泥炮机打泥能力的),合格后出料包装。
具体如下:
原料(此处用A代替)的具体规格和比例如下:
名称 | 焦炭 | 氮化硅铁 | 粘土 | 绢云母 | 石墨粉 | 纳米碳粉 | 合量 |
规格 | 3-0mm | 250目 | 220目 | 220目 | 200目 | 30-200 | |
比例 | 15--25 | 40-60 | 6-10 | 6-10 | 6-10 | 15-25 | 100 |
涂覆剂 | 0.1-1 | ||||||
钝化剂 | 0.1-1 |
后料(此处用B代替)的具体规格和比例如下(碳化硅和刚玉都有颗粒料和粉料之区,因此在比较是分别就粉料和颗粒料来进行):
名称 | SiC | SiC | 刚玉 | 刚玉 | 矾土 | 腊石 | 合量 |
规格 | 3-0mm | 325目 | 1-0 | 200目 | 3-0mm | 3-0mm | |
比例 | 10-20 | 16-25 | 16-22 | 10-20 | 20-45 | 20-50 | 100 |
按照高炉炮泥功能设计和耐材基本原理设定A料和B料均为500公斤,其中A料占比为60-40%,B料占比为40-60%。
项目性能对比表如下:
项目 | 1350高炉 | 2300高炉 | 3200高炉 | 2300高炉 | 3200高炉 |
比例 | A45+B55 | A50+B50 | A55+B45 | 未涂覆钝化 | 未涂覆钝化 |
结合剂 | 13.8% | 14.5% | 15.3% | 16.3% | 17.5% |
气孔率 | 25.8% | 24.7% | 23.3% | 27.6% | 26.2% |
耐压强度 | 5.3 | 7.2 | 9.8 | 5.0 | 6.2 |
铁口深度 | 3.0m | 3.2m | 3.5m | 3.1 | 3.4 |
出铁时间 | 135min | 160min | 180min | 130 | 150 |
泥耗 | 0.6 | 0.5 | 0.45 | 0.65 | 0.58 |
断漏率 | 5 | 4 | 3 | 10 | 9 |
通过对比发现,采用本发明所提供的高炉炮泥其性能以及所产生的经济效益更加优越。
以上所述的仅是本发明所公开的一种高炉炮泥及制备方法的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。
Claims (7)
1.一种高炉炮泥,其特征在于,包含有如下组分的原料:
焦炭:15%-25%;粘土质6%-10%;氮化硅铁40%-60%;石墨6%-10%、;高纯碳微粉15%-25%;涂覆剂和钝化剂。
2.根据权利要求1所述的一种高炉炮泥,其特征在于,所述涂覆剂为醇类物质,所述涂覆剂可为粘度适中的乙二醇、聚乙二醇、甘醇中的一种或二种以上以任意配比混合形成;所述涂覆剂的添加比例为0.1-1%。
3.根据权利要求1所述的一种高炉炮泥,其特征在于,所述钝化剂为有机硅烷,所述钝化剂为甲基硅油、二甲基硅油、改性硅油等一种或者二种以上以任意配合混合而成;所述钝化剂的添加比例0.1-1.0%。
4.根据权利要求1所述的一种高炉炮泥,其特征在于,还包含有与原料1:1的后料,所述后料为低气孔率、高致密的颗粒料或者是低气孔率、高致密的粉料,所述后料包含有碳化硅15%-20%、刚玉15%-20%、矾土20%-40%和腊石20%-50%。
5.根据权利要求1所述的一种高炉炮泥,其特征在于,所述焦炭为高吸油率、高气孔率。
6.根据权利要求5所述的一种高炉炮泥,其特征在于,所述焦炭为颗粒料,所述焦炭的直径不低于0.075mm;所述黏土质、氮化硅铁、石墨和高纯碳粉为粉料,所述黏土质、氮化硅铁、石墨和高纯碳粉的直径低于0.075mm;
所述焦炭的气孔率为40-45。
7.一种高炉炮泥的制备方法,其特征在于,其制备步骤具体如下:
(1)、对原料进行选料,具体如下:焦炭3-0mm、氮化硅铁200目、粘土200目、绢云母200目、石墨粉200目、高纯碳微粉5-300纳米及其他高气孔率、高吸油率炮泥原料100份;
(2)、将原料进行预混、搅拌5-10min;
(3)、将涂覆剂用雾化喷雾器向预混料中均匀喷洒,并搅拌5-10min;其中涂覆剂的添加量为预处理里料的0.1-1.0%;
(4)、将钝化剂滴入到预处理料中,并搅拌5-10min;其中钝化剂的添加量为预处理里料的0.1-1.0%;
(5)、向经过步骤(4)加工后的混合料中加入由刚玉、铝矾土、碳化硅、叶腊石、金属粉等骨料组成的混合料,并添加适当比例的有机结合剂,经混炼轮碾充分后,检测炮泥马夏值,合格后出料包装。
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