CN116178005A - 一种半钢罐渣线用耐火泥、使用方法及其制备方法 - Google Patents

一种半钢罐渣线用耐火泥、使用方法及其制备方法 Download PDF

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CN116178005A
CN116178005A CN202211513410.7A CN202211513410A CN116178005A CN 116178005 A CN116178005 A CN 116178005A CN 202211513410 A CN202211513410 A CN 202211513410A CN 116178005 A CN116178005 A CN 116178005A
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slag line
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张子恒
李中文
谢平
戚明强
邓小兵
高亮
郑常波
张晓明
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Gangcheng Group Liangshan Ruihai Industry Co ltd
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Abstract

本发明公开了一种半钢罐渣线用耐火泥，以质量份数计，原料包括以下组分：铝碳化硅碳砖粉末41～49份；烧结镁粉21～33份；蓝晶石3～8份；广西白泥6～10份；三氧化二铝微粉4～8份；硅微粉1～2份；沥青1～3份；CA‑70水泥4～8份；硼砂0.5～1份；六偏磷酸钠0.1～0.15份；木钙1～4份。本发明能够使半钢罐渣线砖部位耐材具有较高的高温抗折强度、较高的抗热震性能和较高的防沾渣能力。

Description

一种半钢罐渣线用耐火泥、使用方法及其制备方法
技术领域
本发明涉及炼钢耐火材料技术领域，具体来说，涉及一种半钢罐渣线用耐火泥。
背景技术
高炉铁水经“提钒”或“三脱”等预处理以后成半钢，有些炼钢厂炼钢工艺为脱硫—提钒—转炉炼钢，也有一些钢厂使用后脱硫工序，此工序一般在脱硫工序出现问题时进行，以保证生产的顺利进行，半钢罐作为盛放半钢的载体，常常通过砌筑或浇注耐火材料保护罐壳以实现钢水的运输，其作用是承接通过提钒转炉后1350-1400℃的半钢，并将其送往脱硫工序后吹喷石灰与钝化镁粉进行脱硫处理，这个过程需要大约10～15分钟，半钢中大量硫化物形成并上浮，后通过拔渣处理去除，随后半钢罐将半钢运至炼钢转炉完成一次周转。在实际生产过程中，半钢罐周期频率低、冷热交替频繁，特别是渣线砖部位更容易受到空气和脱硫渣的影响从而减少渣线砖寿命，因此要求半钢罐渣线砖部位耐材具有一定高温抗折强度、一定抗热震性能和一定防沾渣能力。
发明内容
针对相关技术中的问题，本发明提出一种半钢罐渣线用耐火泥，以使半钢罐渣线砖部位耐材具有较高的高温抗折强度、较高的抗热震性能和较高的防沾渣能力。
为实现上述目的，本发明提供如下技术方案：一种半钢罐渣线用耐火泥，以质量份数计，原料包括以下组分：铝碳化硅碳砖粉末41～49份；烧结镁粉21～33份；蓝晶石3～8份；广西白泥6～10份；三氧化二铝微粉4～8份；硅微粉1～2份；沥青1～3份；CA-70水泥4～8份；硼砂0.5～1份；六偏磷酸钠0.1～0.15份；木钙1～4份。
在可能的一个设计中，原料具体为：粒径≤0.45mm的铝碳化硅碳砖粉末、粒径≤0.09mm的烧结镁粉；粒径＜0.074mm的蓝晶石；粒径≤0.09mm的广西白泥；粒径≤0.01mm的三氧化二铝微粉；粒径＜0.074mm的硅微粉；粒径＜0.074mm的沥青；粒径＜0.088mm的CA-70水泥；粒径＜0.074mm的硼砂；粒径＜0.074mm的六偏磷酸钠；粒径＜0.074mm的木钙。
所述硅微粉按重量计含SiO2≥94％；所述沥青按重量计含固定碳≥45％，结焦值≥54％，树脂≥18％，水分≤5％；所述CA-70水泥为纯铝酸钙系水泥，按重量计含Al2O3≥70％，CaO＜25％。
在可能的一个设计中，所述三氧化二铝微粉为α-Al2O3微粉，按重量计含Al2O3≥98％，。
在可能的一个设计中，所述广西白泥按重量计含Al2O3≥46％。
在可能的一个设计中，所述烧结镁粉按重量计含MgO＞93％、H2O≤0.5％，其密度为2.5-3.5g/cm3。
在可能的一个设计中，所述铝碳化硅碳砖粉末按重量计含Al2O3≥70％、SiC+C≥10％、H2O≤0.5％、Fe2O3≤1％。
在可能的一个设计中，所述铝碳化硅碳砖粉末的制备方法为：回收铝碳化硅碳砖后破碎磁选出杂质，再讲磁选后的铝碳化硅碳砖粉末通过梯形磨粉机，最终将铝碳化硅碳砖制成粒径≤0.045mm的粉末。
本发明还提供一种半钢罐渣线用耐火泥的制备方法，包括以下步骤：将原料按质量份数加入搅拌机中，混合均匀后包装即可。
本发明还提供一种半钢罐渣线用耐火泥使用方法，包括以下步骤：将耐火泥料放入搅拌机中，先干混1～2分钟后加入水，水的加入量为耐火泥质量百分比12～15％，搅拌3分钟即可用于渣线砖的施工。
本发明具备以下有益效果：
本发明所选择的原材料功能如下：采用铝碳化硅碳砖粉末为主体，利用其中的SiC和C提高耐火泥的抗渣性和抗粘渣性，同时节约资源，减少生产成本。利用烧结镁粉和铝碳化硅碳砖中的Al烧结形成镁铝尖晶石相，进一步提高火泥的性能，利用蓝晶石提高火泥的抗热震能力，同时少量蓝晶石产生的微膨胀使耐火泥与半钢罐渣线砖结合得更紧密，减少半钢罐渣线砖的开裂、掉落。利用广西白泥和沥青可使火泥拥有较好的黏度使渣线砖与火泥结合性上升，此外广西白泥可改善火泥的涂抹性能，方便人员施工。沥青在高温下可现场碳状网络，提高火泥的抗渣性和强度。
活性三氧化二铝微粉和硅微粉结合使用可以提升火泥的施工性能，并且硅微粉的加入可以缓冲膨胀应力，提高火泥的强度、抗渣性及高温体积稳定性。水泥采用铝酸钙系CA70水泥，其中氧化铝含量在70％左右的均可作为本发明使用的水泥，这类水泥水化性能稳定，机械强度优异，而且强度提升合适，适于作为半钢罐渣线砖修砌提供前期施工强度。
硼砂、六偏磷酸钠和木钙构成了添加剂，硼砂可降低火泥的烧结温度，使火泥在使用过程中烧结性能更好，六偏在少量加水的条件下形成分散性的凝胶，加强浇注料的施工强度同时减少火泥的加水量。木钙的添加可以改善火泥的和易性，显著改善操作性能，并有减水、增强、防止龟裂等良好效果。
具体实施方式
实施例1：
一种半钢罐渣线用耐火泥，以质量份数计，原料包括以下组分：粒径为≤0.45mm的铝碳化硅碳砖粉末41～49％；粒径为≤0.09mm的烧结镁粉21～33％；粒径为＜0.074mm的蓝晶石3％～8％；粒径为≤0.09mm的广西白泥6～10％；粒径为≤0.01mm的三氧化二铝微粉4％～8％；粒径为＜0.074mm的硅微粉1～2％；粒径为＜0.074mm的沥青1％～3％；粒径为＜0.088mm的CA-70水泥4％～8％；粒径为＜0.074mm的硼砂0.5～1％；粒径为＜0.074mm的六偏磷酸钠0.1～0.15％；粒径为＜0.074mm的木钙1～4％。
其中具体为：46千克粒径≤0.45mm的铝碳化硅碳砖粉末、26千克粒径≤0.09mm的烧结镁粉、5千克粒径＜0.074mm的蓝晶石、8千克粒径≤0.09mm的广西白泥、6千克粒径≤0.01mm的三氧化二铝微粉、1千克粒径＜0.074mm的硅微粉、2千克粒径＜0.074mm的沥青、6千克粒径为＜0.088mm的CA-70水泥，外加0.8千克的硼砂、0.1千克的六偏磷酸钠、2千克的木钙。
所述铝碳化硅碳砖粉末按重量计含Al2O3≥70％、SiC+C≥10％、H2O≤0.5％、Fe2O3≤1％；
所述烧结镁粉按重量计含MgO＞93％、H2O≤0.5％，其体密为2.5-3.5g/cm3。
所述蓝晶石微粉按重量计含固定Al2O3≥60％，SiO2≤37％，H2O≤0.5％；
所述广西白泥按重量计含Al2O3≥46％；
所述三氧化二铝微粉为α-Al2O3微粉按重量记含Al2O3≥98％；
所述硅微粉按重量计含SiO2≥94％；
所述沥青按重量计含固定碳≥45％，结焦值≥54％，树脂≥18％，水分≤5％；
所述CA-70水泥为纯铝酸钙系水泥，按重量计含Al2O3≥70％，CaO＜25％；
所述硼砂执行GB/T 537-2009标准，无水硼砂含量≥95％；
所述六偏磷酸钠的CAS号为：10124-56-8；
所述木钙按重量计含木质素50％～65％，PH值为4～6.
本发明还提供一种半钢罐渣线用耐火泥的制备方法，包括以下步骤：将原料按质量份数加入搅拌机中，混合均匀后包装即可。具体的，原料送入滚筒式搅拌机内进行混合搅拌，经混合搅拌4min后，将混匀的物料通过三通阀放料装置放进干燥的吨袋包装袋内，按500Kg/袋进行包装，系好开口标识入库备用。取样检测钢包包盖微孔浇注料的理化指标，检测结果如下表，检测合格后入库。
项目 检测结果％
Al2O3+MgO，％ 73.12
SiC+C，％ 5.13
耐火度，℃ 1764
体积密度，g/cm3(110*24h) 2.3
抗折强度，MPa(1200*3h) 6.6
线变化率，％(1200*3h) 0.15
本发明还提供一种半钢罐渣线用耐火泥使用方法，包括以下步骤：将耐火泥料放入搅拌机中，先干混1～2分钟后加入水，水的加入量为耐火泥质量百分比12～15％，搅拌3分钟即可用于渣线砖的施工。
本实施例半钢罐渣线用耐火泥，其作为半钢罐渣线砖修砌时的耐火材料，送往某炼钢厂修砌作业区，将混合均匀的散装料加入搅拌机，加入水13～14wt％，搅拌3～4min，具有较好的涂抹性，修砌半钢罐渣线砖后，室温养护24～48h，可上线烘烤使用。
应用半钢罐2个，耐火泥料用量1吨，从施工得到的反馈来看，该耐火泥料使用方便施工性能良好，黏度适中。到大修下线收集的数据来看，渣线砖半钢罐渣线砖开始掉落次数从平均131次提升至平均137次，渣线砖寿命略有提升。
实施例2：
与实施例1的区别仅在于：原料包括45千克粒径≤0.45mm的铝碳化硅碳砖粉末、25千克粒径≤0.09mm的烧结镁粉、6千克粒径＜0.074mm的蓝晶石、9千克粒径≤0.09mm的广西白泥、5千克粒径≤0.01mm的三氧化二铝微粉、1千克粒径＜0.074mm的硅微粉、3千克粒径＜0.074mm的沥青、5千克粒径为＜0.088mm的CA-70水泥，外加0.8千克的硼砂、0.1千克的六偏磷酸钠、3千克的木钙。
制备方法：将原料送入滚筒式搅拌机内进行混合搅拌，经混合搅拌4min后，将混匀的物料通过三通阀放料装置放进干燥的吨袋包装袋内，按500Kg/袋进行包装，系好开口标识入库备用。取样检测钢包包盖微孔浇注料的理化指标，检测结果如下表，检测合格后再运至某炼钢厂修砌作业区。
项目 检测结果％
Al2O3+MgO，％ 71.79
SiC+C，％ 5.43
耐火度，℃ 1786
体积密度，g/cm3(110*24h) 2.2
抗折强度，MPa(1200*3h) 6.9
线变化率，％(1200*3h) 0.21
本实施例半钢罐渣线用耐火泥，其作为半钢罐渣线砖修砌时的耐火材料，送往某炼钢厂修砌作业区，将混合均匀的散装料加入搅拌机，加入水14～15wt％，搅拌3～4min，具有较好的涂抹性，修砌半钢罐渣线砖后，室温养护24～48h，可上线烘烤使用。
应用半钢罐3个，耐火泥料用量1.5吨，从施工得到的反馈来看，该耐火泥料使用方便施工性能良好，黏度略微偏大。到大修下线收集的数据来看，渣线砖半钢罐渣线砖开始掉落次数从平均136次提升至平均144次，渣线砖寿命有所提升。
实施例3：
与实施例1的区别仅在于：原料包括以下组分：粒径为≤0.45mm的铝碳化硅碳砖粉末41千克；粒径为≤0.09mm的烧结镁粉21千克；粒径为＜0.074mm的蓝晶石3千克；粒径为≤0.09mm的广西白泥6千克；粒径为≤0.01mm的三氧化二铝微粉4千克；粒径为＜0.074mm的硅微粉1千克；粒径为＜0.074mm的沥青1千克；粒径为＜0.088mm的CA-70水泥4千克；粒径为＜0.074mm的硼砂0.5千克；粒径为＜0.074mm的六偏磷酸钠0.1千克；粒径为＜0.074mm的木钙1千克。
制备方法：将原料送入滚筒式搅拌机内进行混合搅拌，经混合搅拌4min后，将混匀的物料通过三通阀放料装置放进干燥的吨袋包装袋内，按500Kg/袋进行包装，系好开口标识入库备用。取样检测钢包包盖微孔浇注料的理化指标，检测结果如下表，检测合格后再运至某炼钢厂修砌作业区。
项目 检测结果％
Al2O3+MgO，％ 72.32
SiC+C，％ 5.23
耐火度，℃ 1794
体积密度，g/cm3(110*24h) 2.3
抗折强度，MPa(1200*3h) 7.0
线变化率，％(1200*3h) 0.18
本实施例半钢罐渣线用耐火泥，其作为半钢罐渣线砖修砌时的耐火材料，送往某炼钢厂修砌作业区，将混合均匀的散装料加入搅拌机，加入水14～15wt％，搅拌3～4min，具有较好的涂抹性，修砌半钢罐渣线砖后，室温养护24～48h，可上线烘烤使用。
应用半钢罐4个，耐火泥料用量2吨，从施工得到的反馈来看，该耐火泥料使用方便施工性能良好，黏度略微偏大。到大修下线收集的数据来看，渣线砖半钢罐渣线砖开始掉落次数从平均135次提升至平均150次，渣线砖寿命有所提升。
实施例4：
与实施例1的区别仅在于：原料包括以下组分：粒径为≤0.45mm的铝碳化硅碳砖粉末49千克；粒径为≤0.09mm的烧结镁粉33千克；粒径为＜0.074mm的蓝晶石8千克；粒径为≤0.09mm的广西白泥10千克；粒径为≤0.01mm的三氧化二铝微粉8千克；粒径为＜0.074mm的硅微粉2千克；粒径为＜0.074mm的沥青3千克；粒径为＜0.088mm的CA-70水泥8千克；粒径为＜0.074mm的硼砂1千克；粒径为＜0.074mm的六偏磷酸钠0.15千克；粒径为＜0.074mm的木钙4千克。
制备方法：将原料送入滚筒式搅拌机内进行混合搅拌，经混合搅拌4min后，将混匀的物料通过三通阀放料装置放进干燥的吨袋包装袋内，按500Kg/袋进行包装，系好开口标识入库备用。取样检测钢包包盖微孔浇注料的理化指标，检测结果如下表，检测合格后再运至某炼钢厂修砌作业区。
项目 检测结果％
Al2O3+MgO，％ 72.82
SiC+C，％ 5.23
耐火度，℃ 1798
体积密度，g/cm3(110*24h) 2.35
抗折强度，MPa(1200*3h) 7.2
线变化率，％(1200*3h) 0.20
本实施例半钢罐渣线用耐火泥，其作为半钢罐渣线砖修砌时的耐火材料，送往某炼钢厂修砌作业区，将混合均匀的散装料加入搅拌机，加入水12～13wt％，搅拌3～4min，具有较好的涂抹性，修砌半钢罐渣线砖后，室温养护24～48h，可上线烘烤使用。
应用半钢罐5个，耐火泥料用量2.5吨，从施工得到的反馈来看，该耐火泥料使用方便施工性能良好，黏度略微偏大。到大修下线收集的数据来看，渣线砖半钢罐渣线砖开始掉落次数从平均133次提升至平均154次，渣线砖寿命有所提升。
实施例1-4所述的半钢罐渣线用耐火泥满足以下理化指标。
Figure SMS_1
Figure SMS_2
根据本发明实施例1-4的内容可以得出：本发明半钢罐渣线用耐火泥在半钢罐渣线砖修砌时的应用情况良好、施工良好，在线使用寿命明显增长，本发明的应用能有效缓解半钢罐渣线砖在线使用过程中出现剥落的现象，延长了半钢罐渣线砖寿命，为炼钢厂节能减排、降低成本带来了有利影响，应用前景广阔。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，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 (10)

1.一种半钢罐渣线用耐火泥，其特征在于，以质量份数计，原料包括以下组分：铝碳化硅碳砖粉末41～49份；烧结镁粉21～33份；蓝晶石3～8份；广西白泥6～10份；三氧化二铝微粉4～8份；硅微粉1～2份；沥青1～3份；CA-70水泥4～8份；硼砂0.5～1份；六偏磷酸钠0.1～0.15份；木钙1～4份。
2.根据权利要求1所述的一种半钢罐渣线用耐火泥，其特征在于，原料具体为：粒径≤0.45mm的铝碳化硅碳砖粉末、粒径≤0.09mm的烧结镁粉；粒径＜0.074mm的蓝晶石；粒径≤0.09mm的广西白泥；粒径≤0.01mm的三氧化二铝微粉；粒径＜0.074mm的硅微粉；粒径＜0.074mm的沥青；粒径＜0.088mm的CA-70水泥；粒径＜0.074mm的硼砂；粒径＜0.074mm的六偏磷酸钠；粒径＜0.074mm的木钙。
3.根据权利要求2所述的一种半钢罐渣线用耐火泥，其特征在于，所述硅微粉按重量计含SiO2≥94％；所述沥青按重量计含固定碳≥45％，结焦值≥54％，树脂≥18％，水分≤5％；所述CA-70水泥为纯铝酸钙系水泥，按重量计含Al2O3≥70％，CaO＜25％。
4.根据权利要求1-3任一项所述的一种半钢罐渣线用耐火泥，其特征在于，所述三氧化二铝微粉为α-Al2O3微粉，按重量计含Al2O3≥98％，。
5.根据权利要求1-3任一项所述的一种半钢罐渣线用耐火泥，其特征在于，所述广西白泥按重量计含Al2O3≥46％。
6.根据权利要求1-3任一项所述的一种半钢罐渣线用耐火泥，其特征在于，所述烧结镁粉按重量计含MgO＞93％、H2O≤0.5％，其密度为2.5-3.5g/cm3。
7.根据权利要求1-3任一项所述的一种半钢罐渣线用耐火泥，其特征在于，所述铝碳化硅碳砖粉末按重量计含Al2O3≥70％、SiC+C≥10％、H2O≤0.5％、Fe2O3≤1％。
8.根据权利要求1-3任一项所述的一种半钢罐渣线用耐火泥，其特征在于，所述铝碳化硅碳砖粉末的制备方法为：回收铝碳化硅碳砖后破碎磁选出杂质，再讲磁选后的铝碳化硅碳砖粉末通过梯形磨粉机，最终将铝碳化硅碳砖制成粒径≤0.045mm的粉末。
9.一种制备如权利要求1-8任一项所述半钢罐渣线用耐火泥的方法，其特征在于，包括以下步骤：将原料按质量份数加入搅拌机中，混合均匀后包装即可。
10.一种半钢罐渣线用耐火泥使用方法，其特征在于，包括以下步骤：将权利要求1-7任一项所述的或权利要求8-9任一项制备的耐火泥料放入搅拌机中，先干混1～2分钟后加入水，水的加入量为耐火泥质量百分比12～15％，搅拌3分钟即可用于渣线砖的施工。
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