CN106673675A - 一种高性能尖晶石质透气砖芯及其制备方法 - Google Patents

一种高性能尖晶石质透气砖芯及其制备方法 Download PDF

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CN106673675A
CN106673675A CN201611135785.9A CN201611135785A CN106673675A CN 106673675 A CN106673675 A CN 106673675A CN 201611135785 A CN201611135785 A CN 201611135785A CN 106673675 A CN106673675 A CN 106673675A
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air brick
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王堂玺
姜富先
倪奎
孙培秋
张玉福
王振波
高洪月
王勇
沙广民
纪国强
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Dandong Bomo Refractories Co Ltd
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Abstract

一种高性能尖晶石质透气砖芯，其特征在于主要是由以重量份数计：尖晶石70‑75份、铬料2‑6份、氧化铝3‑6份、镁砂3‑5份、水泥3‑4份和0.05‑0.1份防爆纤维制成；所述铬料为含铬料、铬绿中的一种或二种；氧化铝为活性氧化铝微粉、刚玉微粉中的一种或二种，水泥为铝酸钙水泥，为结合剂。本发明的高性能透气砖芯抗折强度12‑18MPa；耐压强度50‑70MPa；显气孔率20‑22%；体积密度2.78‑2.9g/cm3;线变化率为0‑0.5%。特别是该砖芯生产工艺简单，所制备的高性能透气砖芯透气性好，抗侵蚀性、抗渗透性和热震稳定性优良，具备很好的使用性能，大幅提高透气砖的使用寿命。

Description

一种高性能尖晶石质透气砖芯及其制备方法
技术领域
本发明属于炼钢用透气砖技术领域，具体涉及一种高性能尖晶石质透气砖芯及其制备方法。
技术背景
目前炉外精炼技术在现代钢铁生产中已成为不可缺少的重要环节，在增加钢材的品种和改善钢材的质量等方面日益显示出其优越性。钢包底吹气体是炉外精炼工艺的关键，底吹透气砖是这一工艺最为关键的功能元件，它的使用性能对底吹气体工艺的顺利实施，保证炉外精炼工艺的可靠性和安全性至关重要。通过安装在钢包底部的透气砖向钢液中吹入氢气、氮气等惰性气体，充分搅拌钢水，快速分散、熔化添加在钢水中的合金、脱氧剂、脱硫剂等，使钢水中的有害夹杂物和气体上浮，达到均匀钢水成分和温度、降低气体含量、改善钢液流动性、精炼钢液的目的。透气砖芯是透气砖的核心部件，是透气砖使用寿命的决定因素，透气砖芯使用性能好，透气砖使用寿命就高。
目前使用的一些透气砖透气性能较差，使用寿命短，影响炼钢的生产效率。
发明内容
本发明的目的，是提供一种高性能尖晶石质透气砖芯，该透气砖透气性好，使用寿命长，能有效提高炼钢的生产效率。
本发明的另一目的，是提供一种高性能尖晶石质透气砖芯的制备方法。
采用的技术方案是：
一种高性能尖晶石质透气砖芯，其特征在于主要是由以重量份数计：尖晶石80-90份、铬料2-6份、氧化铝3-6份、镁砂1-5份、水泥3-5份和0.05-0.1份防爆纤维制成。
上述铬料为含铬料、铬绿中的一种或二种。氧化铝为活性氧化铝微粉、刚玉微粉中的一种或二种，水泥为铝酸钙水泥，为结合剂。
尖晶石粒度为6～0.01mm，铬料粒度为2～0.01mm，氧化铝粒度为0.01～0.001mm，镁砂粉粒度为0.01～0.001mm。
一种高性能尖晶石质透气砖芯的制备方法，是将80-90份尖晶石、2-6份铬料、3-6份氧化铝、1-5份镁砂、3-5份水泥和0.05-0.1份防爆纤维混合均匀后放入搅拌机，加入总料重量0.1-0.2%的减水剂和3.5-5%的水，搅拌时间3-5min，浇注进入模具中振动成型。在20-50℃的环境中静置18-24h。脱模后在90-180℃的条件下干燥22-36h。干燥后在1400-1500℃的条件下保温5-10h。自然降温冷却后即为高性能尖晶石质透气砖芯。
所使用的设备：
1、电子天平：百分之一天平、千分之一天平等；
2、预混机：二维混合机、三维混合机等；
3、搅拌机：行星搅拌机、刮板搅拌机、碾轮搅拌机、碾轮刮板搅拌机等；
4、振动台：磁吸或机械双向振动台；
5、干燥窑：控温精度±5℃；
6、高温电窑：控温精度±10℃。
本发明的高性能透气砖芯抗折强度12-18MPa；耐压强度50-70MPa；显气孔率20-22%；体积密度2.78-2.9g/cm3;线变化率为0-0.5%。
特别是该砖芯生产工艺简单，所制备的高性能透气砖芯透气性好，抗侵蚀性、抗渗透性和热震稳定性优良，具备很好的使用性能，大幅提高透气砖的使用寿命。
具体实施方式：
实施例一
一种高性能尖晶石质透气砖芯，主要是由85份尖晶石、2份铬料、氧化铝5份、3份镁砂、4份水泥和0.05份防爆纤维制成。
实施例二
一种高性能尖晶石质透气砖芯，主要是由88份尖晶石、3份铬料、氧化铝3份、1份镁砂、4份水泥和0.1份防爆纤维制成。
实施例三
一种高性能尖晶石质透气砖芯，主要是由80份尖晶石、5份铬料、氧化铝4份、5份镁砂、5份水泥和0.06份防爆纤维制成。
实施例四
一种高性能尖晶石质透气砖芯，主要是由83份尖晶石、5份铬料、氧化铝6份、2份镁砂、4份水泥和0.09份防爆纤维制成。

Claims (7)

1.一种高性能尖晶石质透气砖芯，其特征在于主要是由以重量份数计：尖晶石70-75份、铬料2-6份、氧化铝3-6份、镁砂3-5份、水泥3-4份和0.05-0.1份防爆纤维制成；
所述铬料为含铬料、铬绿中的一种或二种；氧化铝为活性氧化铝微粉、刚玉微粉中的一种或二种；水泥为铝酸钙水泥。
2.根据权利要求1所述的一种高性能尖晶石质透气砖芯，其特征在于所述的尖晶石粒度为6～0.01mm，铬料粒度为2～0.01mm，氧化铝粒度为0.01～0.001mm，镁砂粉粒度为0.01～0.001mm。
3.根据权利要求1所述的一种高性能尖晶石质透气砖芯，其特征在于主要是由70份尖晶石、2份铬料、氧化铝3份、3份镁砂、3份水泥和0.05份防爆纤维制成。
4.根据权利要求1所述的一种高性能尖晶石质透气砖芯，其特征在于主要是由75份尖晶石、6份铬料、氧化铝3份、6份镁砂、5份水泥和0.1份防爆纤维制成。
5.根据权利要求1所述的一种高性能尖晶石质透气砖芯，其特征在于主要是由73份尖晶石、3份铬料、氧化铝4份、4份镁砂、3份水泥和0.06份防爆纤维制成。
6.根据权利要求1所述的一种高性能尖晶石质透气砖芯，其特征在于主要是由72份尖晶石、4份铬料、氧化铝6份、5份镁砂、4份水泥和0.09份防爆纤维制成。
7.一种高性能尖晶石质透气砖芯的制备方法，其特征是将70-75份尖晶石、2-6份铬料、3-6份氧化铝、3-5份镁砂、3-4份水泥和0.05-0.1份防爆纤维混合均匀后放入搅拌机，加入0.1-0.2%的减水剂和3.5-5%的水，搅拌时间3-5min，浇注进入模具中振动成型；在20-50℃的环境中静置18-24h；脱模后在90-180℃的条件下干燥22-36h；干燥后在1400-1500℃的条件下保温5-10h，自然降温冷却后即为高性能尖晶石质透气砖芯。
CN201611135785.9A 2016-12-12 2016-12-12 一种高性能尖晶石质透气砖芯及其制备方法 Pending CN106673675A (zh)

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Cited By (1)

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CN107746258B (zh) * 2017-10-31 2020-09-04 营口四通高温新材料科技有限公司 一种超低线变化免烧透气砖及其制备方法和应用

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CN102173826A (zh) * 2010-12-30 2011-09-07 中南大学 一种高热震稳定性的刚玉透气座砖及生产方法
CN102617169A (zh) * 2012-03-31 2012-08-01 武汉科技大学 一种刚玉尖晶石浇注料及其制备方法
CN103011865A (zh) * 2012-12-25 2013-04-03 潍坊华强耐火材料有限公司 一种透气砖及其制备方法
CN103787670A (zh) * 2012-11-03 2014-05-14 无锡成博科技发展有限公司 一种中间包透气砖的制备方法

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JP2007145622A (ja) * 2005-11-25 2007-06-14 Mino Ceramic Co Ltd スピネル−マグネシア質れんが
CN102173826A (zh) * 2010-12-30 2011-09-07 中南大学 一种高热震稳定性的刚玉透气座砖及生产方法
CN102617169A (zh) * 2012-03-31 2012-08-01 武汉科技大学 一种刚玉尖晶石浇注料及其制备方法
CN103787670A (zh) * 2012-11-03 2014-05-14 无锡成博科技发展有限公司 一种中间包透气砖的制备方法
CN103011865A (zh) * 2012-12-25 2013-04-03 潍坊华强耐火材料有限公司 一种透气砖及其制备方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107746258B (zh) * 2017-10-31 2020-09-04 营口四通高温新材料科技有限公司 一种超低线变化免烧透气砖及其制备方法和应用

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Application publication date: 20170517