CN116283319A - 一种中频炉用线圈浇注料及其制备方法 - Google Patents
一种中频炉用线圈浇注料及其制备方法 Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 96
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 66
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000007767 bonding agent Substances 0.000 claims abstract description 27
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 26
- 239000010431 corundum Substances 0.000 claims abstract description 26
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 239000005350 fused silica glass Substances 0.000 claims abstract description 22
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 22
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 22
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000003723 Smelting Methods 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims abstract description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 42
- 238000002156 mixing Methods 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052863 mullite Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract description 7
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
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- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract 1
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract 1
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- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明公开一种中频炉用线圈浇注料及其制备方法，属于中频感应炉用耐火材料技术领域，其包括以下重量份原料：熔融石英22‑45份、刚玉细粉12‑18份、α‑Al2O3微粉6‑15份、电熔M70莫来细粉4‑8份、防爆裂纤维1‑3份、镁砂细粉3‑7份、二氧化硅3‑5份、氧化锆5‑8份、无机结合剂4‑6份；本发明使得线圈浇注后与线圈结合的整体性好，后期强度高，不易产生收缩开裂等现象，提高了线圈的整体使用寿命，能够经受高温烟气和煤灰的强烈冲刷以及炉膛温度的剧烈波动，可显著提高炉体的使用寿命。
Description
技术领域
本发明涉及中频感应炉用耐火材料技术领域，尤其涉及一种中频炉用线圈浇注料及其制备方法。
背景技术
中频感应炉是钢铁行业和铸造行业常用的一种高温冶炼设备，具有升温速度快、可间歇作业、操作方便、污染小和高效节能等特点。感应线圈是中频炉的重要组成部分之一，用于对中频炉进行加热。在中频炉冶炼使用中，可能会因为中频炉内部炉衬的原因，导致中频炉的高温钢液渗透至感应线圈从而引起线圈的损毁，甚至造成设备和人身事故。采用耐火材料对线圈进行保护，对生产的安全、有序进行有重要的意义。
目前保护线圈用的耐火材料大部分为线圈胶泥，一般采用高纯刚玉、氧化铝微粉、水泥和粘土为主要原料，涂抹在线圈周围，对线圈提供保护作用。例如中国CN104030704A和CN104030703A公开了用于中频炉炉衬的胶泥及其制备方法，其以致密棕刚玉、致密棕刚玉细粉、结合剂、超微粉、添加剂和防爆剂为原料制成胶泥，涂抹在线圈周围，能延长炉龄和提高使用效率，具有快干脱模和快速烘烤等特点：崔建国等研究的中频炉感应线圈保护涂料(崔建国等.中频炉感应线圈保护涂料的实验研究，河北冶金,1994.4(82),46～47)以矾土熟料为主要原料制备耐火胶泥；代西龙等所配置的无芯感应电炉用耐火胶泥(代西龙等.无芯感应电炉用耐火胶泥的配制及应用.铸造，2006.55(5)，528～529)以致密电熔刚玉、活性氧化铝微粉、纯铝酸钙水泥为原料制备耐火胶泥。胶泥涂抹在线圈的方式虽然能够保护线圈，但是后期容易出现收缩裂纹，而且，胶泥的整体性差，施工效率也较低。另外，由于中频炉的使用特点，要不断经过几百度的温度和常温的循环变换，需要线圈耐火材料具有良好的抗热震稳定性能，而目前保护线圈用的耐火材料热震稳定性较差，严重影响了线圈的使用寿命。为此我们提出一种中频炉用线圈浇注料及其制备方法。
发明内容
针对现有技术的不足，本发明提供了一种中频炉用线圈浇注料及其制备方法，克服了现有技术的不足，旨在解决背景技术中的问题。
为实现上述目的，本发明提供如下技术方案：一种中频炉用线圈浇注料，包括以下重量份原料：熔融石英22-45份、刚玉细粉12-18份、α-Al2O3微粉6-15份、电熔M70莫来细粉4-8份、防爆裂纤维1-3份、镁砂细粉3-7份、二氧化硅3-5份、氧化锆5-8份、无机结合剂4-6份。
优选地，无机结合剂为偏铝酸钠、硅酸钠、水合氧化铝中的任一种。
优选地，所述浇注料包括以下重量份原料：熔融石英22份、刚玉细粉12份、α-Al2O3微粉6份、电熔M70莫来细粉4份、防爆裂纤维1份、镁砂细粉3份、二氧化硅3份、氧化锆5份、无机结合剂4份。
优选地，所述浇注料包括以下重量份原料：熔融石英33份、刚玉细粉15份、α-Al2O3微粉11份、电熔M70莫来细粉6份、防爆裂纤维2份、镁砂细粉5份、二氧化硅4份、氧化锆7份、无机结合剂5份。
优选地，所述浇注料包括以下重量份原料：熔融石英45份、刚玉细粉18份、α-Al2O3微粉15份、电熔M70莫来细粉8份、防爆裂纤维3份、镁砂细粉7份、二氧化硅5份、氧化锆8份、无机结合剂6份。
优选地，所述α-Al2O3微粉的中位粒径≤0.004mm。
本发明另一方面提供一种中频炉用线圈浇注料的制备方法，包括以下步骤：
步骤一，准备以下重量份原料，熔融石英22-45份、刚玉细粉12-18份、α-Al2O3微粉6-15份、电熔M70莫来细粉4-8份、防爆裂纤维1-3份、镁砂细粉3-7份、二氧化硅3-5份、氧化锆5-8份、无机结合剂4-6份；
步骤二，去以上重量份的熔融石英、刚玉细粉、α-Al2O3微粉、电熔M70莫来细粉与水混合，加热到90-150℃混合搅拌，保温1-2h，得到混合料；
步骤三，向混合料依次添加防爆裂纤维、镁砂细粉、二氧化硅、氧化锆、无机结合剂，升温至200-220℃继续搅拌混合均匀即可得到线圈浇注料。
优选地，所述无机结合剂粒度为0.06-0.09mm。
优选地，步骤二中，搅拌转速为300-500r/min。
本发明的有益效果：
本申请以熔融石英、刚玉细粉、α-Al2O3微粉、电熔M70莫来细粉为主要原料，使得浇注料高温体积稳定性强、热震稳定性高，使用寿命更长，保存期更长，浇注后与线圈结合的整体性好，后期强度高，不易产生收缩开裂等现象，提高了线圈的整体使用寿命；
本申请通过添加防爆裂纤维、镁砂细粉、二氧化硅、氧化锆、无机结合剂，可以提高浇注料的常温强度和中温强度，可有效避免浇筑线圈变得异常疏松，使得浇筑线圈自身具有较高的高温强度和优异的抗热震性能，能够经受高温烟气和煤灰的强烈冲刷以及炉膛温度的剧烈波动。可显著提高炉体的使用寿命。
本发明使得线圈浇注后与线圈结合的整体性好，后期强度高，不易产生收缩开裂等现象，提高了线圈的整体使用寿命，能够经受高温烟气和煤灰的强烈冲刷以及炉膛温度的剧烈波动，可显著提高炉体的使用寿命。
具体实施方式
下面将结合本发明实施例，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
步骤一，准备以下重量份原料，熔融石英22份、刚玉细粉12份、α-Al2O3微粉6份、电熔M70莫来细粉4份、防爆裂纤维1份、镁砂细粉3份、二氧化硅3份、氧化锆5份、无机结合剂4份，无机结合剂粒度为0.06mm，无机结合剂为偏铝酸钠，所述α-Al2O3微粉的中位粒径≤0.004mm；
步骤二，去以上重量份的熔融石英、刚玉细粉、α-Al2O3微粉、电熔M70莫来细粉与水混合，加热到900℃混合搅拌，搅拌转速为300r/min，保温1h，得到混合料；
步骤三，向混合料依次添加防爆裂纤维、镁砂细粉、二氧化硅、氧化锆、无机结合剂，升温至200℃继续搅拌混合均匀即可得到线圈浇注料。
实施例二
步骤一，准备以下重量份原料，熔融石英33份、刚玉细粉15份、α-Al2O3微粉11份、电熔M70莫来细粉6份、防爆裂纤维2份、镁砂细粉5份、二氧化硅4份、氧化锆7份、无机结合剂5份，无机结合剂粒度为0.07mm，无机结合剂为硅酸钠，所述α-Al2O3微粉的中位粒径≤0.004mm；
步骤二，去以上重量份的熔融石英、刚玉细粉、α-Al2O3微粉、电熔M70莫来细粉与水混合，加热到110℃混合搅拌，搅拌转速为380r/min，保温1.5h，得到混合料；
步骤三，向混合料依次添加防爆裂纤维、镁砂细粉、二氧化硅、氧化锆、无机结合剂，升温至210℃继续搅拌混合均匀即可得到线圈浇注料。
实施例三
步骤一，准备以下重量份原料，熔融石英34份、刚玉细粉16份、α-Al2O3微粉11份、电熔M70莫来细粉6份、防爆裂纤维2份、镁砂细粉6份、二氧化硅5份、氧化锆8份、无机结合剂6份，无机结合剂粒度为0.08mm，无机结合剂为水合氧化铝，所述α-Al2O3微粉的中位粒径≤0.004mm；
步骤二，去以上重量份的熔融石英、刚玉细粉、α-Al2O3微粉、电熔M70莫来细粉与水混合，加热到130℃混合搅拌，搅拌转速为400r/min，保温1.5h，得到混合料；
步骤三，向混合料依次添加防爆裂纤维、镁砂细粉、二氧化硅、氧化锆、无机结合剂，升温至215℃继续搅拌混合均匀即可得到线圈浇注料。
实施例四
步骤一，准备以下重量份原料，熔融石英45份、刚玉细粉18份、α-Al2O3微粉15份、电熔M70莫来细粉8份、防爆裂纤维3份、镁砂细粉7份、二氧化硅5份、氧化锆8份、无机结合剂6份，无机结合剂粒度为0.09mm，无机结合剂为水合氧化铝，所述α-Al2O3微粉的中位粒径≤0.004mm；
步骤二，去以上重量份的熔融石英、刚玉细粉、α-Al2O3微粉、电熔M70莫来细粉与水混合，加热到150℃混合搅拌，搅拌转速为500r/min，保温2h，得到混合料；
步骤三，向混合料依次添加防爆裂纤维、镁砂细粉、二氧化硅、氧化锆、无机结合剂，升温至220℃继续搅拌混合均匀即可得到线圈浇注料。
对比例一
对比例一为已经公告的申请号为201910457016.8的专利文件说明书中的实施例1。
将本申请的实施例进行热震侧视和抗渣试验，抗渣试验为在1500℃温度下进行4小时试验，得到以下数据表格：
通过以上数据表格可以得出，本发明使得线圈浇注后与线圈结合的整体性好，后期强度高，不易产生收缩开裂等现象，提高了线圈的整体使用寿命，能够经受高温烟气和煤灰的强烈冲刷以及炉膛温度的剧烈波动。可显著提高炉体的使用寿命。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
Claims (9)
1.一种中频炉用线圈浇注料，其特征在于，所述浇注料包括以下重量份原料：熔融石英22-45份、刚玉细粉12-18份、α-Al2O3微粉6-15份、电熔M70莫来细粉4-8份、防爆裂纤维1-3份、镁砂细粉3-7份、二氧化硅3-5份、氧化锆5-8份、无机结合剂4-6份。
2.根据权利要求1所述的一种中频炉用线圈浇注料，其特征在于，无机结合剂为偏铝酸钠、硅酸钠、水合氧化铝中的任一种。
3.根据权利要求1所述的一种中频炉用线圈浇注料，其特征在于，所述浇注料包括以下重量份原料：熔融石英22份、刚玉细粉12份、α-Al2O3微粉6份、电熔M70莫来细粉4份、防爆裂纤维1份、镁砂细粉3份、二氧化硅3份、氧化锆5份、无机结合剂4份。
4.根据权利要求1所述的一种中频炉用线圈浇注料，其特征在于，所述浇注料包括以下重量份原料：熔融石英33份、刚玉细粉15份、α-Al2O3微粉11份、电熔M70莫来细粉6份、防爆裂纤维2份、镁砂细粉5份、二氧化硅4份、氧化锆7份、无机结合剂5份。
5.根据权利要求1所述的一种中频炉用线圈浇注料，其特征在于，所述浇注料包括以下重量份原料：熔融石英45份、刚玉细粉18份、α-Al2O3微粉15份、电熔M70莫来细粉8份、防爆裂纤维3份、镁砂细粉7份、二氧化硅5份、氧化锆8份、无机结合剂6份。
6.根据权利要求1所述的一种中频炉用线圈浇注料，其特征在于，所述α-Al2O3微粉的中位粒径≤0.004mm。
7.根据权利要求1-6任一项所述的中频炉用线圈浇注料的制备方法，其特征在于，包括以下步骤：
步骤一，准备以下重量份原料，熔融石英22-45份、刚玉细粉12-18份、α-Al2O3微粉6-15份、电熔M70莫来细粉4-8份、防爆裂纤维1-3份、镁砂细粉3-7份、二氧化硅3-5份、氧化锆5-8份、无机结合剂4-6份；
步骤二，去以上重量份的熔融石英、刚玉细粉、α-Al2O3微粉、电熔M70莫来细粉与水混合，加热到90-150℃混合搅拌，保温1-2h，得到混合料；
步骤三，向混合料依次添加防爆裂纤维、镁砂细粉、二氧化硅、氧化锆、无机结合剂，升温至200-220℃继续搅拌混合均匀即可得到线圈浇注料。
8.根据权利要求7所述的中频炉用线圈浇注料的制备方法，其特征在于，所述无机结合剂粒度为0.06-0.09mm。
9.根据权利要求7所述的中频炉用线圈浇注料的制备方法，其特征在于，步骤二中，搅拌转速为300-500r/min。
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