CN106242592B - 一种防崩塌中间包涂抹料及其制备方法 - Google Patents

一种防崩塌中间包涂抹料及其制备方法 Download PDF

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CN106242592B
CN106242592B CN201610573892.3A CN201610573892A CN106242592B CN 106242592 B CN106242592 B CN 106242592B CN 201610573892 A CN201610573892 A CN 201610573892A CN 106242592 B CN106242592 B CN 106242592B
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magnesite clinker
speed rail
fiber
powder
mesh
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张文国
李乃动
孙晓
孟凡祥
梁绪正
张滨
李宪奎
李华君
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Shandong Guomao Metallurgical Materials Co Ltd
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Abstract

本发明涉及一种防崩塌中间包涂抹料及其制备方法，属于不定形耐火材料技术领域，其特征是，由下述重量百分比的原料制成：粒径为3～1mm的高铁烧结镁砂20～30％、粒径为1～0.5mm高铁烧结镁砂18～25％、粒径≤0.5mm高铁烧结镁砂18～25％、200目92烧结镁砂0～35％、200目电熔镁砂0～35％、三聚磷酸钠0～1％、焦磷酸钠0～1％、广西白粘土1～4％、硅微粉0～2％、乙二醇0.1～0.4％、黄糊精0.2～0.5％、金属铝粉0.01～0.05％、纸纤维1～2.2％、防爆纤维0～0.2％；上述原料配成100％。本发明的涂抹料具有优良的施工性能，保水性较好，养护时无裂纹，低温强度较高，快速烘烤时不崩塌、不开裂。使用性能较好。

Description

一种防崩塌中间包涂抹料及其制备方法
技术领域
本发明涉及一种防崩塌中间包涂抹料及其制备方法，属于不定形耐火材料技术领域。
背景技术
目前，随着炼钢连铸技术的不断发展，中间包内衬耐火材料的寿命也在不断延长，其内衬耐火材料也逐渐被长寿命干式料代替。但是，对于生产特种钢来说，中间包内衬的寿命并不是越长越好。因为中间包内衬使用时间越长耐火材料浸蚀越严重，浸蚀下来的耐火材料越多对钢水越容易产生污染，影响钢水洁净度。这样涂抹料就有明显优势，这也是目前许多特钢厂中间包内衬仍然采用涂抹料的原因。相对于干式料，涂抹料更有利于钢水净化，而且施工周期短、成本低。
由于涂抹料在施工时要加水搅拌成泥浆，因此在烘烤时涂抹料内衬极易出现崩塌现象，尤其生产特钢时浇注时间短、中间包周转快，有时需要快速烘烤，这样更容易出现崩塌。一旦出现崩塌直接影响钢厂生产安排，造成直接经济损失。而且影响钢水质量。
发明内容
本发明针对中间包涂抹料在快速烘烤时产生崩塌的问题，提供了一种防崩塌中间包涂抹料；同时，本发明提供了该涂抹料的制法。
本发明具体采用的技术方案是：
一种防崩塌中间包涂抹料，其特征是，由下述重量百分比的原料制成：
上述原料配成100％。
其中，所述高铁烧结镁砂为30mm以上大块料加工而成，其MgO含量大于90％、Fe2O3含量2～3.5％；它比其它烧结镁砂更致密、体密高，以它为主原料制成涂抹料，加水量低，强度高。
其中，所述92烧结镁砂为30mm以上大块料加工而成，其MgO含量大于91.5％。本发明中，“92烧结镁砂”是根据GB/T2273-2007中牌号MS92的中文名称。
其中，所述电熔镁砂为96电熔镁砂，其MgO含量大于95.5％。本发明中，“96电熔镁砂”是牌号名，在市场上很容易采购到。
所述涂抹料中金属铝粉Al含量为99.7％以上，粒度为70～120目。
所述防暴纤维是以聚丙烯为主要原料制成，具有抗拉伸、耐冲击、提高整体强度等优点，具有非常好的分散性，主要用于涂抹料、浇注料等不定形耐火材料，在市场上很容易获得。
本发明选择的防暴纤维，其纤维中位直径为80微米，纤维中位长度为4毫米，熔化温度为120℃。
本发明中，所述纸纤维是以废报纸和废书粉碎后制成的纤维，在市场上很容易获得。
一种防崩塌中间包涂抹料的制备方法，其特征是，包括如下步骤：
⑴按配方称量后的三聚磷酸钠、焦磷酸钠、广西白粘土、硅微粉、黄糊精、金属铝粉加入小型混合机中混合20～30分钟，混好的料装入带塑料内衬的编织袋中备用，称为混合粉；
⑵按配方称量3～1mm、1～0.5mm、0.5～0mm镁砂原料，加入强制混合机中搅拌1分钟，然后加入称量后乙二醇混合2分钟，充分混匀使乙二醇均匀包裹镁砂颗粒，再加入称量后的防爆纤维和纸纤维，混合2～3分钟，最后加入称量后的200目镁砂细粉和混合粉，再混合8～15分钟，制成产品。
本发明的优点是：
1)本发明的涂抹料具有优良的施工性能，保水性较好，养护时无裂纹，低温强度较高，快速烘烤时不崩塌、不开裂；使用性能较好。
2)本发明涂抹料粒度组成为四级颗粒配比即：3～1mm、1～0.5mm、0.5～0mm、200目细粉，与通常用的三级颗粒配比相比，不会产生因粒度变化而影响涂抹料的施工性能。
3)本发明中加入乙二醇可降低涂抹料的加水量，提高强度，而且乙二醇可降低水的蒸气压，即降低水分排出温度，这样涂抹料烘烤时在低温时水分就可排出，防止高温时水分排出过激造成涂抹料崩塌。本发明中黄糊精比其它增塑剂更能增强涂抹料的塑性和养护后的强度。
具体实施方式
实施例一
1)配方：
3～1mm高铁烧结镁砂25％、1～0.5mm高铁烧结镁砂20％、0.5～0mm高铁烧结镁砂20％、200目92烧结镁砂30％、三聚磷酸钠0.5％、焦磷酸钠0.5％、广西白粘土1％、硅微粉1％、乙二醇0.15％、黄糊精0.4％、金属铝粉0.01％、纸纤维1.5％、防爆纤维0.1％。
2)制备方法：
⑴按配方称量后的三聚磷酸钠、焦磷酸钠、广西白粘土、硅微粉、黄糊精、金属铝粉等加入小型混合机中混合20～30分钟，混好的料装入带塑料内衬的编织袋中备用，称为混合粉。
⑵按配方称量3～1mm、1～0.5mm、0.5～0mm镁砂原料，加入强制混合机中搅拌1分钟左右。然后加入称量后的液态乙二醇混合2分钟左右，充分混匀使液态乙二醇均匀包裹镁砂颗粒。再加入称量后的防爆纤维和纸纤维，混合2～3分钟。最后加入称量后的200目镁砂细粉和步骤⑴的混合粉，再混合8～15分钟，制成产品。
实施例二
1)配方：
3～1mm高铁烧结镁砂30％、1～0.5mm高铁烧结镁砂20％、0.5～0mm高铁烧结镁砂20％、200目92烧结镁砂24％、三聚磷酸钠0.25％、焦磷酸钠0.25％、广西白粘土3％、硅微粉1％、乙二醇0.1％、黄糊精0.5％、金属铝粉0.015％、纸纤维1％、防爆纤维0.1％。
2)制备方法：
⑴按配方称量后的三聚磷酸钠、焦磷酸钠、广西白粘土、硅微粉、黄糊精、金属铝粉等加入小型混合机中混合20～30分钟，混好的料装入带塑料内衬的编织袋中备用，称为混合粉。
⑵按配方称量3～1mm、1～0.5mm、0.5～0mm镁砂原料，加入强制混合机中搅拌1分钟左右。然后加入称量后的液态乙二醇混合2分钟左右，充分混匀使液态乙二醇均匀包裹镁砂颗粒。再加入称量后的防爆纤维和纸纤维，混合2～3分钟。最后加入称量后的200目镁砂细粉和步骤⑴的混合粉，再混合8～15分钟，制成产品。
实施例三
1)配方：
3～1mm高铁烧结镁砂23％、1～0.5mm高铁烧结镁砂22％、0.5～0mm高铁烧结镁砂18％、200目电熔镁砂31％、三聚磷酸钠0.6％、广西白粘土1％、硅微粉2％、乙二醇0.2％、黄糊精0.4％、金属铝粉0.01％、纸纤维1.2％、防爆纤维0.15％。
2)制备方法：
⑴按配方称量后的三聚磷酸钠、广西白粘土、硅微粉、黄糊精、金属铝粉等加入小型混合机中混合20～30分钟，混好的料装入带塑料内衬的编织袋中备用，称为混合粉。
⑵按配方称量3～1mm、1～0.5mm、0.5～0mm镁砂原料，加入强制混合机中搅拌1分钟左右。然后加入称量后的液态乙二醇混合2分钟左右，充分混匀使液态乙二醇均匀包裹镁砂颗粒。再加入称量后的防爆纤维和纸纤维，混合2～3分钟。最后加入称量后的200目镁砂细粉和步骤⑴的混合粉，再混合8～15分钟，制成产品。
实施例四
1)配方：
3～1mm高铁烧结镁砂20％、1～0.5mm高铁烧结镁砂23％、0.5～0mm高铁烧结镁砂22％、200目92烧结镁砂28.5％、三聚磷酸钠0.65％、焦磷酸钠0.35％、广西白粘土2％、硅微粉1％、乙二醇0.25％、黄糊精0.3％、金属铝粉0.03％、纸纤维1.8％、防爆纤维0.15％。
2)制备方法
⑴按配方称量后的三聚磷酸钠、焦磷酸钠、广西白粘土、硅微粉、黄糊精、金属铝粉等加入小型混合机中混合20～30分钟，混好的料装入带塑料内衬的编织袋中备用，称为混合粉。
⑵按配方称量3～1mm、1～0.5mm、0.5～0mm镁砂原料，加入强制混合机中搅拌1分钟左右。然后加入称量后的液态乙二醇混合2分钟左右，充分混匀使液态乙二醇均匀包裹镁砂颗粒。再加入称量后的防爆纤维和纸纤维，混合2～3分钟。最后加入称量后的200目镁砂细粉和步骤⑴的混合粉，再混合8～15分钟，制成产品。
实施例五
1)配方：
3～1mm高铁烧结镁砂24％、1～0.5mm高铁烧结镁砂21％、0.5～0mm高铁烧结镁砂20％、200目电熔镁砂29％、三聚磷酸钠0.6％、焦磷酸钠0.4％、广西白粘土1.5％、硅微粉1.5％、乙二醇0.2％、黄糊精0.3％、金属铝粉0.015％、纸纤维1.5％、防爆纤维0.1％。
2)制备方法
⑴按配方称量后的三聚磷酸钠、焦磷酸钠、广西白粘土、硅微粉、黄糊精、金属铝粉等加入小型混合机中混合20～30分钟，混好的料装入带塑料内衬的编织袋中备用，称为混合粉。
⑵按配方称量3～1mm、1～0.5mm、0.5～0mm镁砂原料，加入强制混合机中搅拌1分钟左右。然后加入称量后的液态乙二醇混合2分钟左右，充分混匀使液态乙二醇均匀包裹镁砂颗粒。再加入称量后的防爆纤维和纸纤维，混合2～3分钟。最后加入称量后的200目镁砂细粉和步骤⑴的混合粉，再混合8～15分钟，制成产品。

Claims (5)

1.一种防崩塌中间包涂抹料，其特征是，由下述重量百分比的原料制成：
粒径为3～1mm的高铁烧结镁砂20～30％
粒径为1～0.5mm高铁烧结镁砂18～25％
粒径≤0.5mm高铁烧结镁砂18～25％
200目92烧结镁砂0～35％
200目电熔镁砂0～35％
三聚磷酸钠0～1％
焦磷酸钠0～1％
广西白粘土1～4％
硅微粉0～2％
乙二醇0.1～0.4％
黄糊精0.2～0.5％
金属铝粉0.01～0.05％
纸纤维1～2.2％
防爆纤维0～0.2％
上述原料配成100％
所述高铁烧结镁砂为30mm以上大块料加工而成，其MgO含量大于90％、Fe2O3含量2～3.5％。
2.根据权利要求1所述的防崩塌中间包涂抹料，其特征是，所述92烧结镁砂为30mm以上大块料加工而成，其MgO含量大于91.5％；所述电熔镁砂为96电熔镁砂，其MgO含量大于95.5％。
3.根据权利要求1所述的防崩塌中间包涂抹料，其特征是，所述金属铝粉Al含量为99.7％以上，粒度为70～120目。
4.根据权利要求1所述的其特征是，所述防暴纤维，其纤维中位直径为80微米，纤维中位长度为4毫米，熔化温度为120℃。
5.根据权利要求1所述的防崩塌中间包涂抹料的制备方法，其特征是，包括如下步骤：
(1)按配方称量后的三聚磷酸钠、焦磷酸钠、广西白粘土、硅微粉、黄糊精、金属铝粉加入小型混合机中混合20～30分钟，混好的料装入带塑料内衬的编织袋中备用，称为混合粉；
(2)按配方称量3～1mm、1～0.5mm、0.5～0mm高铁烧结镁砂，加入强制混合机中搅拌1分钟，然后加入称量后的乙二醇混合2分钟，再加入称量后的防爆纤维和纸纤维，混合2～3分钟，最后加入称量后的200目镁砂细粉和混合粉，再混合8～15分钟，制成产品。
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