CN107903040A - 一种用于钢水精炼炉炉底的镁铬质捣打料及生产方法 - Google Patents
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Abstract
本发明涉及一种用于钢水精炼炉炉底的镁铬质捣打料及生产方法,包括以下重量份的原料:0<粒径≤1mm的镁铬砂27‑30份;1mm<粒径≤3mm的镁铬砂24‑26份;3mm<粒径≤6mm的镁铬砂25‑27份;镁铬砂325目14‑17份;结合剂5‑11份。本发明的优点是:以方镁石和镁铬尖晶石为主晶相的镁铬砂和结合剂为原料,制成的捣打料具有耐侵蚀性好,使用寿命长的优点。
Description
技术领域
本发明属于精炼炉炉底用耐火材料技术领域,尤其涉及一种用于钢水精炼炉炉底的镁铬质捣打料及生产方法。
背景技术
镁铬质耐火材料是一种含三氧化二铬的镁质耐火材料,氧化铬通过固熔于方镁石和形成低膨胀的镁铬尖晶石,近年来,有色冶炼炉、钢水精炼炉、水泥回转窑等高温窑炉都普遍采用镁铬质耐火材料。镁铬质材料具有良好的荷重软化温度、高温强度、抗侵蚀性、热震稳定性、较低的导热率和较好的挂窑皮性、较好的使用效果,延长使用寿命。因捣打料主要用于与熔融物直接接触部位,故要求粒、粉状料必须具有高的体积稳定性、致密性和耐侵蚀性。
发明内容
为克服现有技术的不足,本发明的目的是提供一种用于钢水精炼炉炉底的镁铬质捣打料及生产方法,具有耐侵蚀性好,使用寿命长的优点。
为实现上述目的,本发明通过以下技术方案实现:
一种用于钢水精炼炉炉底的镁铬质捣打料,包括以下重量份的原料:
0<粒径≤1mm的镁铬砂27-30份;1mm<粒径≤3mm的镁铬砂24-26份;3mm<粒径≤6mm的镁铬砂25-27份;镁铬砂325目14-17份;结合剂5-11份。
所述的结合剂是硼酸粉、树脂粉、液态树脂的混合物。
所述烧结镁砂中MgO的重量百分比含量≥94.0%,镁铬砂中Si2O3的重量百分比含量≥40.0%。
一种用于钢水精炼炉炉底的镁铬质捣打料的生产方法,包括以下步骤:
1)将废镁铬砖粉碎筛分细磨,并按所述重量份数称取原料;
2)将0<粒径≤1mm、1mm<粒径≤3mm、3mm<粒径≤6mm的镁铬砂与硼酸粉预混均匀;
3)混练:将树脂粉和液态树脂缓慢倒入行星式混砂机,再加入325目的镁铬砂混合10-15min,然后出料;
5)出料后所得捣打料的理化指标为:MgO的重量百分比≥31.5%;Fe2O3的重量百分比≤8.2;SiO2的重量百分比≤2.6;Al2O3的重量百分比≤10.8;灼减量≥3.9;在1500℃×3h条件下耐压强度≥51MPa;在1100℃×3h条件下耐压强度≥15MPa。
与现有技术相比,本发明的有益效果是:
钢水精炼炉炉底镁铬质捣打料的生产方法,以方镁石和镁铬尖晶石为主晶相的镁铬砂和结合剂为原料,制成的捣打料具有耐侵蚀性好,使用寿命长的优点。同时,并利用废镁铬砖为主要原料,充分利用二次资源,在满足使用要求的同时可进一步降低生产成本,节约自然资源。
具体实施方式
下面对本发明进行详细地描述,但是应该指出本发明的实施不限于以下的实施方式。
一种用于钢水精炼炉炉底的镁铬质捣打料,包括以下重量份的原料:
0<粒径≤1mm的镁铬砂27-30份;1mm<粒径≤3mm的镁铬砂24-26份;3mm<粒径≤6mm的镁铬砂25-27份;镁铬砂325目14-17份;结合剂5-11份。
其中,结合剂是硼酸粉、树脂粉、液态树脂的混合物。烧结镁砂中MgO的重量百分比含量≥94.0%,镁铬砂中Si2O3的重量百分比含量≥40.0%。
一种用于钢水精炼炉炉底的镁铬质捣打料的生产方法,包括以下步骤:
1)将废镁铬砖粉碎筛分细磨,并按所述重量份数称取原料;
2)将0<粒径≤1mm、1mm<粒径≤3mm、3mm<粒径≤6mm的镁铬砂与硼酸粉预混均匀;
3)混练:将树脂粉和液态树脂缓慢倒入行星式混砂机,再加入325目的镁铬砂混合10-15min,然后出料;
5)出料后所得捣打料的理化指标为:MgO的重量百分比≥31.5%;Fe2O3的重量百分比≤8.2;SiO2的重量百分比≤2.6;Al2O3的重量百分比≤10.8;灼减量≥3.9;在1500℃×3h条件下耐压强度≥51MPa;在1100℃×3h条件下耐压强度≥15MPa。
实施例:
实施例1-5捣打料的生产方法,包括以下步骤:
1)原料粉碎筛分细磨:将镁铬石在破碎机中破碎,分别制成3-5mm、1-3mm和325目原料;
2)配比:按上述重量份数称取原料;
3)先将0-1mm、1-3mm、3-5mm的镁铬砂预混均匀;
4)混练:将5%树脂粉及液态树脂缓慢倒入行星式混砂机,再分别加入325目的镁铬砂混合10-15min然后出料;
5)出料后,质检员对该料进行抽检,抽检执行标见表1。
表1捣打料的理化指标
6)验收及包装:
a验收:
(1)料的取样、验收按YB 367-75《耐火制品取样、验收、保管和运输规则》进行。
(2)随机取样做化学成分分析。
b包装、运输、贮存及质量证明书:
(1)料的包装、运输和贮存按YB 367-75《耐火制品取样、验收、保管和运输规则》进行。
(2)料出厂时必须附有技术监督部门签发的质量证明书、标明供方名称或厂标、需方名称、发货日期、合同号、标准编号、产品名称、牌号、批号及理化指标,等结果报告。
Claims (4)
1.一种用于钢水精炼炉炉底的镁铬质捣打料,其特征在于,包括以下重量份的原料:
0<粒径≤1mm的镁铬砂27-30份;1mm<粒径≤3mm的镁铬砂24-26份;3mm<粒径≤6mm的镁铬砂25-27份;镁铬砂325目14-17份;结合剂5-11份。
2.根据权利要求1所述的一种用于钢水精炼炉炉底的镁铬质捣打料,其特征在于,所述的结合剂是硼酸粉、树脂粉、液态树脂的混合物。
3.根据权利要求1所述的一种用于钢水精炼炉炉底的镁铬质捣打料,其特征在于,所述烧结镁砂中MgO的重量百分比含量≥94.0%,镁铬砂中Si2O3的重量百分比含量≥40.0%。
4.一种根据权利要求1-3任意一项所述的用于钢水精炼炉炉底的镁铬质捣打料的生产方法,其特征在于,包括以下步骤:
1)将废镁铬砖粉碎筛分细磨,并按所述重量份数称取原料;
2)将0<粒径≤1mm、1mm<粒径≤3mm、3mm<粒径≤6mm的镁铬砂与硼酸粉预混均匀;
3)混练:将树脂粉和液态树脂缓慢倒入行星式混砂机,再加入325目的镁铬砂混合10-15min,然后出料;
5)出料后所得捣打料的理化指标为:MgO的重量百分比≥31.5%;Fe2O3的重量百分比≤8.2;SiO2的重量百分比≤2.6;Al2O3的重量百分比≤10.8;灼减量≥3.9;在1500℃×3h条件下耐压强度≥51MPa;在1100℃×3h条件下耐压强度≥15MPa。
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CN110218076A (zh) * | 2019-05-28 | 2019-09-10 | 海城利尔麦格西塔材料有限公司 | 一种利用废镁铬砖制作中间包/钢包水口座砖填料的方法 |
CN111499358A (zh) * | 2020-04-21 | 2020-08-07 | 嵩明忠诚新材料科技有限公司 | 一种镁铬质干式防渗捣打料 |
CN114853449A (zh) * | 2022-05-10 | 2022-08-05 | 海城利尔麦格西塔材料有限公司 | 一种稳定耐冲击的铁合金电炉炉底捣打料的生产方法 |
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