CN111116182A - 一种耐火砖的制备方法 - Google Patents

一种耐火砖的制备方法 Download PDF

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CN111116182A
CN111116182A CN202010015931.4A CN202010015931A CN111116182A CN 111116182 A CN111116182 A CN 111116182A CN 202010015931 A CN202010015931 A CN 202010015931A CN 111116182 A CN111116182 A CN 111116182A
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refractory brick
brick
carbon
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黄子程
黄正桃
刘海亚
黄立耀
黄文波
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Changsha Xiangning Refractories Co ltd
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Abstract

本发明公开了一种耐火砖的制备方法将无碳砖、滑板和电熔镁粉破碎后，得到混合粉体；所述混合粉体经除铁除杂，成型后得到砖坯，烘烤即得。

Description

一种耐火砖的制备方法
技术领域
本发明公开了一种耐火砖的制备方法，属于无机非金属材料领域。
背景技术
炼钢厂在生产钢材的过程中会产生多种固体废弃物，其中就包括钢包无碳砖废料和钢包滑板废料。这些废料如何处理成为一个亟待解决的问题。
发明内容
本发明提供了一种环保的耐火砖的制备方法。
本发明一种耐火砖的制备方法，将无碳砖、滑板和电熔镁粉破碎后，得到混合粉体；所述混合粉体经除铁除杂，成型后得到砖坯，烘烤即得。
所述无碳砖的中氧化铝的含量为80-90wt％；氧化铁的含量小于或等于2wt％。
所述无碳砖的中碳含量大于或等于1wt％。
所述滑板中碳含量大于2wt％；氧化铁的含量小于2wt％。
所述滑板中氧化铝的含量为70-80wt％。
所述电熔镁中氧化镁的含量大于95wt％。
所述电熔镁中氧化铁的含量小于2wt％。
所述混合粉体的粒径小于0.088mm的粉体大于30wt％，混合粉体的粒径0-5mm的粉体大于或等于70wt％。
所述砖坯的密度为2.82-2.9g/cm3，并且气孔率小于6％。
所述烘烤的温度为200℃。
相对于现有技术，本发明的有益效果如下：
本发明采用钢厂钢包无碳砖和钢包滑板为原料，在其中加入镁粉，制备得到了耐火性能优良的耐火砖，实现了工业固体废弃物的再利用，保护了环境解决了固体废弃物难以回收利用的难题。
具体实施方案
本发明提供了一种以钢厂废料为原料，制备耐火砖的方法。所述原料包括钢包无碳砖和钢包滑板。所述原料经拣选，除去铁、煤熔瘤和石灰石等杂质后，即可用于耐火砖的制备。除杂后，所述原料鄂破机，对辊机和雷蒙磨破碎至原料中30％以上的颗粒的粒径小于0.088mm，70％的颗粒的粒径0-5mm后，即可用于砖坯成型。
除杂、破碎后的原料经至少30min的混碾后即可进行成型。所述混碾过程中，需向原料中加入水玻璃并润湿。
所述原料需采用630t摩擦压砖机来成型。成型时需控制砖坯的密度为2.9g/cm3。砖坯的气孔率应小于6％，且砖坯表面不能有裂纹、层裂与麻面。
成型后得到的砖坯经自然干燥即可装窑。装窑时应注意“边密中稀、上密下稀”。
砖坯经烘烤后即得所述耐火砖。所述烘烤制度如下：
室温至50℃升温速度为12℃/h；
50-100℃升温速度为12℃/h；
100-200℃升温速度为25℃/h；
200℃保温12h。
实施例1
将无碳砖、滑板和电熔镁粉破碎后，得到混合粉体；所述混合粉体经除铁，成型后得到砖坯，烘烤即得其中，所述无碳砖的中氧化铝的含量为80wt％；氧化铁的为2wt％；碳含量为1wt％。所述滑板中碳含量为2wt％；氧化铁的含量为2wt％；氧化铝的含量为75wt％，其他为不可避免的杂质。所述电熔镁中氧化镁的含量为95wt％；氧化铁的含量为2wt％，其他为不可避免的杂质。所述混合粉体的粒径小于0.088mm的粉体为30wt％。混合粉体的粒径0-5mm的粉体为70wt％。所述砖坯的密度为2.9g/cm3，并且气孔率为5％。所述烘烤的温度为200℃。
实施例1制备得到的耐火砖的物理化学性质如下表：
检验项目 单位 标准要求 检索结果 结论
Al<sub>2</sub>O<sub>3</sub>+MgO ％ ≥72 72.5 合格
MgO ％ ≥10 11 合格
显气孔率 MPa ≤10 10 合格
体积密度 g/cm<sup>3</sup> ≥2.8 2.81 合格
常温耐压强度 MPa ≥40 42 合格
0.2MPa荷重软化开始温度 ％ ≥1600 1610 合格
从上表可以看出，实施例1制备得到的耐火砖符合标准的要求。
实施例2
将无碳砖、滑板和电熔镁粉破碎后，得到混合粉体；所述混合粉体经除铁，成型后得到砖坯，烘烤即得其中，所述无碳砖的中氧化铝的含量为90wt％；氧化铁的为2wt％，中碳含量为1wt％。所述滑板中碳含量为2wt％；氧化铁的含量为2wt％；氧化铝的含量为80wt％，其他为不可避免的杂质。所述电熔镁中氧化镁的含量为97wt％；氧化铁的含量为1.5wt％，其他为不可避免的杂质。所述混合粉体的粒径小于0.088mm的粉体为30wt％，混合粉体的粒径0-5mm的粉体为70wt％所述砖坯的密度为2.9g/cm3，并且气孔率为4％。所述烘烤的温度为200℃。
实施例2制备得到的耐火砖的物理化学性质如下表：
Figure BSA0000199625870000031
Figure BSA0000199625870000041
从上表可以看出，实施例1制备得到的耐火砖符合标准的要求。

Claims (10)

1.一种耐火砖的制备方法，其特征在于：将无碳砖、滑板和电熔镁粉破碎后，得到混合粉体；所述混合粉体经除铁，成型后得到砖坯，烘烤即得。
2.如权利要求1所述的耐火砖的制备方法，其特征在于：所述无碳砖的中氧化铝的含量为80-90wt％；氧化铁的含量小于或等于2wt％。
3.如权利要求1所述的耐火砖的制备方法，其特征在于：所述无碳砖的中碳含量大于或等于1wt％。
4.如权利要求1所述的耐火砖的制备方法，其特征在于：所述滑板中碳含量大于2wt％；氧化铁的含量小于2wt％。
5.如权利要求1所述的耐火砖的制备方法，其特征在于：所述滑板中氧化铝的含量为70-80wt％。
6.如权利要求1所述的耐火砖的制备方法，其特征在于：所述电熔镁中氧化镁的含量大于95wt％。
7.如权利要求1所述的耐火砖的制备方法，其特征在于：所述电熔镁中氧化铁的含量小于2wt％。
8.如权利要求1所述的耐火砖的制备方法，其特征在于：所述混合粉体的粒径小于0.088mm的粉体30wt％，混合粉体的粒径0-5mm的粉体大于或等于70wt％。
9.如权利要求1所述的耐火砖的制备方法，其特征在于：所述砖坯的密度为2.82-2.9g/cm3，并且气孔率小于6％。
10.如权利要求1所述的耐火砖的制备方法，其特征在于：所述烘烤的温度为200℃。
CN202010015931.4A 2020-01-08 2020-01-08 一种耐火砖的制备方法 Pending CN111116182A (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102180690A (zh) * 2011-03-11 2011-09-14 攀钢冶金材料有限责任公司 用Al2O3-MgO-CaO合成耐火原料生产Al2O3-MgO砖的方法
CN103601522A (zh) * 2013-12-09 2014-02-26 湖南湘钢瑞泰科技有限公司 一种不烧砖及其制备方法
CN106116477A (zh) * 2016-06-29 2016-11-16 浙江康星新材料科技股份有限公司 一种焚烧炉用耐火砖的制备方法
CN107162611A (zh) * 2017-05-26 2017-09-15 长兴华悦耐火材料厂 含碳废旧耐火砖的资源化回收方法
CN109704791A (zh) * 2018-12-20 2019-05-03 天津炜润达新材料科技有限公司 一种废旧耐火材料的回收利用方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102180690A (zh) * 2011-03-11 2011-09-14 攀钢冶金材料有限责任公司 用Al2O3-MgO-CaO合成耐火原料生产Al2O3-MgO砖的方法
CN103601522A (zh) * 2013-12-09 2014-02-26 湖南湘钢瑞泰科技有限公司 一种不烧砖及其制备方法
CN106116477A (zh) * 2016-06-29 2016-11-16 浙江康星新材料科技股份有限公司 一种焚烧炉用耐火砖的制备方法
CN107162611A (zh) * 2017-05-26 2017-09-15 长兴华悦耐火材料厂 含碳废旧耐火砖的资源化回收方法
CN109704791A (zh) * 2018-12-20 2019-05-03 天津炜润达新材料科技有限公司 一种废旧耐火材料的回收利用方法

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