CN113912403A - 一种低成本高炉冷却壁背部灌浆料 - Google Patents

一种低成本高炉冷却壁背部灌浆料 Download PDF

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CN113912403A
CN113912403A CN202111037885.9A CN202111037885A CN113912403A CN 113912403 A CN113912403 A CN 113912403A CN 202111037885 A CN202111037885 A CN 202111037885A CN 113912403 A CN113912403 A CN 113912403A
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王佳宁
赵现华
张义先
侯中阳
曹贺
金钊
王皓
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Haicheng Lier Maige Xita Material Co ltd
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Abstract

本发明提供一种低成本高炉冷却壁背部灌浆料，所述的灌浆料组份及重量百分比为：40～60％的废镁碳砖颗粒，0～20％的矾土颗粒，30～40的矾土细粉，0～8％的硅微粉，0～5％的增强剂，25～35％的外加结合剂。用低成本的废镁碳砖颗粒部分替代价格昂贵的高铝矾土颗粒，添加增强剂，使灌浆料料理化性能不降低，提高了灌浆料料抗煤气流冲刷性能，通过调整主沟浇注料的基质成分，提高灌浆料的理化性能和高温使用性能。

Description

一种低成本高炉冷却壁背部灌浆料
技术领域
本发明涉及不定形耐火材料技术领域，特别涉及一种低成本高炉冷却壁背部灌浆料。
背景技术
目前，随着高风压、高风温、高富氧的操作日益普遍，高炉的冶炼强度也日趋增大，高炉所面临的许多问题，如炉壳红热、冷却板(冷却壁)烧损、炉壳开裂、炉壳烧穿等，并且上述问题也更趋严重。高炉生产一段时间后，因建设质量、材料性能、生产操作等因素，会不同程度的出现上述现象，从而恶化高炉操作环境，形成安全隐患，严重时还直接影响高炉的正常生产和使用寿命。高炉灌浆维护不仅可以避免上述问题的出现，而且高效快捷，保证了高炉生产正常、安全，从而延长了高炉寿命。
废镁碳砖是工业冶炼钢的副产品，其颗粒体积密度达到3.2g/cm3以上，其化学成分为：MgO≥70％、Al2O3≤5％、Fe2O3≤1.5％、SiO2≤4.5％，熔点高，具有极高的经济效益和社会效益，有效地回收利用，极大地降低了主沟浇注料的生产成本。
发明内容
为了克服背景技术中的不足，本发明提供一种低成本高炉冷却壁背部灌浆料，用低成本的废镁碳砖颗粒部分替代价格昂贵的高铝矾土颗粒，添加增强剂，使灌浆料料理化性能不降低，提高了灌浆料料抗煤气流冲刷性能，通过调整主沟浇注料的基质成分，提高灌浆料的理化性能和高温使用性能。
为了达到上述目的，本发明采用以下技术方案实现：
一种低成本高炉冷却壁背部灌浆料，所述的灌浆料组份及重量百分比为：40～60％的废镁碳砖颗粒，0～20％的矾土颗粒，30～40的矾土细粉，0～8％的硅微粉，0～5％的增强剂，25～35％的外加结合剂。
进一步地，所述的废镁碳砖理化性能要求为：MgO≥70％、Al2O3≤5％、Fe2O3≤1.5％、SiO2≤4.5％，颗粒体积密度≥3.2g/cm3。
进一步地，所述的废镁碳砖粒度要求为1～0mm。
进一步地，所述的矾土颗粒粒度为1～0mm，细粉粒度为200目；理化性能要求为：Al2O3≥75％、TiO2≥3％、CaO≤0.2％、Fe2O3≤1.7％、SiO2≤18％。
进一步地，所述的硅微粉的理化性能要求为：SiO2≥92％，Fe2O3≤0.1％。
进一步地，所述的增强剂为六偏磷酸钠。
进一步地，所述的外加结合剂为液体树脂，其理化性能为残碳≥50％。
与现有技术相比，本发明的有益效果是：
本发明用低成本的废镁碳砖颗粒部分替代价格昂贵的高铝矾土颗粒，添加增强剂，能够改善灌浆的理化性能；该主沟浇注料在降低成本的同时，物理化学性能不降低，具有优良的抗煤气流冲刷性能。
具体实施方式
以下对本发明提供的具体实施方式进行详细说明。
一种低成本高炉冷却壁背部灌浆料，所述的灌浆料组份及重量百分比为：40～60％的废镁碳砖颗粒，0～20％的矾土颗粒，30～40的矾土细粉，0～8％的硅微粉，0～5％的增强剂，25～35％的外加结合剂。
所述的废镁碳砖理化性能要求为：MgO≥70％、Al2O3≤5％、Fe2O3≤1.5％、SiO2≤4.5％，颗粒体积密度≥3.2g/cm3。所述的废镁碳砖粒度要求为1～0mm。
所述的矾土颗粒粒度为1～0mm，细粉粒度为200目；理化性能要求为：Al2O3≥75％、TiO2≥3％、CaO≤0.2％、Fe2O3≤1.7％、SiO2≤18％。
所述的硅微粉的理化性能要求为：SiO2≥92％，Fe2O3≤0.1％。
所述的增强剂为六偏磷酸钠。
所述的外加结合剂为液体树脂，其理化性能为残碳≥50％。
所述的低成本高炉冷却壁背部灌浆料的制备方法，包括如下：
1)按上述比例配置好的混合物先搅拌2分钟；
2)加入30％的液态树脂后再搅拌3分钟；
3)震动浇注成型为设定大小的样块，养护24小时；
4)烘烤110℃×24h；
5)再在高温炉中烧1200℃×3h。
具体实施例：
实施例1
一种低成本的高炉冷却壁背部灌浆料，该灌浆料各组份的颗粒组成为：废镁碳砖1～0mm，高铝矾土1～0mm，200目；
各组份配比(重量百分比)为：40％的废镁碳砖颗粒，15％的高铝矾土颗粒，41％的高铝矾土细粉，3％的硅微粉，1％的增强剂。
按上述比例配置好的混合物先搅拌2分钟，加入30％的液态树脂后再搅拌3分钟，震动浇注成型为40mm×40mm×160mm的样块，养护24小时，烘烤110℃×24h，在高温炉中烧1200℃×3h，检测结果见表一
表一
110℃×24h烘后体积密度 2.1g/cm3
110℃×24h烘后冷态抗折强度 4MPa
110℃×24h烘后冷态耐压强度 38MPa
1200℃×3h烧后冷态抗折强度 8.5MPa
1200℃×3h烧后冷态耐压强度 42.1MPa
1200℃×3h烧后永久线变化率 -0.2％
实施例2
一种低成本的高炉冷却壁背部灌浆料，该灌浆料各组份的颗粒组成为：废镁碳砖1～0mm，高铝矾土1～0mm，200目；
各组份配比(重量百分比)为：45％的废镁碳砖颗粒，10％的高铝矾土颗粒，39％的高铝矾土细粉，4％的硅微粉，2％的增强剂。
按上述比例配置好的混合物先搅拌2分钟，加入30％的液态树脂后再搅拌3分钟，震动浇注成型为40mm×40mm×160mm的样块，养护24小时，烘烤110℃×24h，在高温炉中烧1200℃×3h，检测结果见表二：
表二
Figure BDA0003247965770000031
Figure BDA0003247965770000041
实施例3
一种低成本的高炉冷却壁背部灌浆料，该灌浆料各组份的颗粒组成为：废镁碳砖1～0mm,高铝矾土1～0mm，200目；
各组份配比(重量百分比)为：50％的废镁碳砖颗粒，5％的高铝矾土颗粒，37％的高铝矾土细粉，5％的硅微粉，3％的增强剂。
按上述比例配置好的混合物先搅拌2分钟，加入30％的液态树脂后再搅拌3分钟，震动浇注成型为40mm×40mm×160mm的样块，养护24小时，烘烤110℃×24h，在高温炉中烧1200℃×3h，检测结果见表三：
表三
110℃×24h烘后体积密度 2.1g/cm3
110℃×24h烘后冷态抗折强度 7.6MPa
110℃×24h烘后冷态耐压强度 45.9MPa
1200℃×3h烧后冷态抗折强度 9.2MPa
1200℃×3h烧后冷态耐压强度 40.4MPa
1200℃×3h烧后永久线变化率 -0.3％
以上实施例在以本发明技术方案为前提下进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于上述的实施例。上述实施例中所用方法如无特别说明均为常规方法。

Claims (7)

1.一种低成本高炉冷却壁背部灌浆料，其特征在于，所述的灌浆料组份及重量百分比为：40～60％的废镁碳砖颗粒，0～20％的矾土颗粒，30～40的矾土细粉，0～8％的硅微粉，0～5％的增强剂，25～35％的外加结合剂。
2.根据权利要求1所述的一种低成本高炉冷却壁背部灌浆料，其特征在于，所述的废镁碳砖理化性能要求为：MgO≥70％、Al2O3≤5％、Fe2O3≤1.5％、SiO2≤4.5％，颗粒体积密度≥3.2g/cm3。
3.根据权利要求1所述的一种低成本高炉冷却壁背部灌浆料，其特征在于，所述的废镁碳砖粒度要求为1～0mm。
4.根据权利要求1所述的一种低成本高炉冷却壁背部灌浆料，其特征在于，所述的矾土颗粒粒度为1～0mm，细粉粒度为200目；理化性能要求为：Al2O3≥75％、TiO2≥3％、CaO≤0.2％、Fe2O3≤1.7％、SiO2≤18％。
5.根据权利要求1所述的一种低成本高炉冷却壁背部灌浆料，其特征在于，所述的硅微粉的理化性能要求为：SiO2≥92％，Fe2O3≤0.1％。
6.根据权利要求1所述的一种低成本高炉冷却壁背部灌浆料，其特征在于，所述的增强剂为六偏磷酸钠。
7.根据权利要求1所述的一种低成本高炉冷却壁背部灌浆料，其特征在于，所述的外加结合剂为液体树脂，其理化性能为残碳≥50％。
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