CN116924816A - 一种连铸中间包干式料环保型结合剂 - Google Patents
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Abstract
本发明涉及结合剂领域，提供一种连铸中间包干式料环保型结合剂，其原料组成为：醚基聚羧酸脂0.1‑0.5％，氧化铝微粉20％，低铁型铝酸钙水泥3‑6％，二氧化硅0.1‑0.5％，氧化钙1‑5％，磷酸钙0.1‑0.5％；本发明作为中间包干式料的结合剂时，不仅减少给钢水的增碳增氢，且满足冶炼碳含量较低的钢种需求，高温使用时不产生甲酚、甲醛等刺激性气味，对环境无污染；抗侵蚀性能良好、容易解体、结合强度和中温强度均满足脱模要求，有效避免了干式料中温在线烘烤时抗折强度和耐压强度下降的问题，热处理后的抗折强度、耐压强度均显著提高，有效解决了葡萄糖结合剂脱模后衬体强度偏低的问题。
Description
技术领域
本发明涉及结合剂领域，具体地说是一种连铸中间包干式料环保型结合剂。
背景技术
中间包是短流程炼钢中用到的一个耐火材料容器，首先接受从钢包浇下来的钢水，然后再由中间包水口分配到各个结晶器中去；中间包的作用主要是减压、稳流、去夹杂、贮存和分流钢水；干式料是一种不定形的耐火材料，采用振动法而不加水或液体结合剂，在振动条件下，式料可以形成一个致密均匀的整体，加热时通过结合剂产生强度；结合剂是影响连铸中间包干式料使用性能的关键因素之一，结合剂的选择应考虑为无水，在常温环境下不与镁砂产生反应，200-300T加热后使干式料具有一定的脱模强度，温度达1550℃左右，干式料可烧结成坚实的整体，保证干式料的高温使用性能。
中国专利公告号为：CN109704728A，连铸中间包干式料环保型结合剂，其原料组成为：葡萄糖50-70份、聚合氯化铝30-40份、过氧化苯甲酰4-6份；该发明的连铸中间包干式料环保型结合剂具有较高的低温结合强度，对材料的高温性能影响小，对环境及人身完全无害，而且大大降低了干式料的成本；使用葡萄糖作为结合剂，存在脱模后衬体强度偏低的问题。
综上，因此本发明提供了一种连铸中间包干式料环保型结合剂，以解决上述问题。
发明内容
本发明提供了一种连铸中间包干式料环保型结合剂，通过使用醚基聚羧酸脂分子作为结合剂的主要原料，以解决现有技术中脱模后衬体强度偏低等问题。
一种连铸中间包干式料环保型结合剂，其原料组成为：
醚基聚羧酸脂0.1-0.5％，氧化铝微粉20％，低铁型铝酸钙水泥3-6％，二氧化硅1-5％，氧化钙1-5％，磷酸钙0.1-0.5％。
优选的一种技术方案，所述结合剂适用的干式料以板状刚玉颗粒为主要原料，氧化铝的含量大于99.0％，板状刚玉颗粒的大小组成为：粒度在3mm至5mm之间占比30％，粒度在1mm至3mm之间占比30％，粒度小于1mm的占比40％。
优选的一种技术方案，所述低铁型铝酸钙水泥中的铁元素含量低于2％。
优选的一种技术方案，所述结合剂中添加甲基纤维素3％作为增塑剂。
优选的一种技术方案，所述结合剂中添加碳酸钠0.5-1％作为促凝剂。
优选的一种技术方案，所述结合剂中添加木质素磺酸钙0.5-1.5％作为分散剂。
优选的一种技术方案，所述结合剂的使用流程为将结合剂和干式料原料按比例配置在容器中，在干燥状态下直接进行搅拌，五到八分钟后观察搅拌是否均匀，均匀后向容器中加水，加水后继续搅拌五分钟，最后浇注振动制成干式料。
优选的一种技术方案，所述结合剂的使用流程中的加水量控制在6％以下。
优选的一种技术方案，所述干式料需要使用120℃的锅炉烘干两至三天，再使用1600℃的锅炉对其进行热处理三至五个小时。
与现有技术相比，本发明具有如下有益效果：
本发明作为中间包干式料的结合剂时，不仅减少给钢水的增碳增氢，且满足冶炼碳含量较低的钢种需求，高温使用时不产生甲酚、甲醛等刺激性气味，对环境无污染；抗侵蚀性能良好、容易解体、结合强度和中温强度均满足脱模要求，有效避免了干式料中温在线烘烤时抗折强度和耐压强度下降的问题，热处理后的抗折强度、耐压强度均显著提高，有效解决了葡萄糖结合剂脱模后衬体强度偏低的问题。
附图说明
图1是本发明中间包结构示意图。
图2是本发明结合剂配比流程图。
图中：
1、中间包；2、挡渣墙；3、挡渣坝；4、长水口；5、冲击垫。
具体实施方式
下面结合附图和实施例对本发明的实施方式作进一步详细描述。以下实施例用于说明本发明，但不能用来限制本发明的范围。
如图1-2所示，本发明提供一种连铸中间包干式料环保型结合剂，其原料组成为：
醚基聚羧酸脂0.1-0.5％，氧化铝微粉20％，低铁型铝酸钙水泥3-6％，二氧化硅1-5％，氧化钙1-5％，磷酸钙0.1-0.5％。
作为本发明的一种实施方式，所述结合剂适用的干式料以板状刚玉颗粒为主要原料，氧化铝的含量大于99.0％，板状刚玉颗粒的大小组成为：粒度在3mm至5mm之间占比30％，粒度在1mm至3mm之间占比30％，粒度小于1mm的占比40％。
作为本发明的一种实施方式，所述低铁型铝酸钙水泥中的铁元素含量低于2％。
作为本发明的一种实施方式，所述结合剂中添加甲基纤维素3％作为增塑剂，所述增塑剂的主要作用是削弱聚合物分子之间的次价健，从而增加了聚合物分子链的移动性，降低了聚合物分子链的结晶性，即增加了聚合物的塑性，表现为聚合物的硬度、模量、软化温度和脆化温度下降，而伸长率、曲挠性和柔韧性提高。
作为本发明的一种实施方式，所述结合剂中添加碳酸钠0.5-1％作为促凝剂，所述促凝剂起到促进凝结与硬化时间速度加快的作用。
作为本发明的一种实施方式，所述结合剂中添加木质素磺酸钙0.5-1.5％作为分散剂，所述分散剂溶于水后吸附于分散相表面，提高溶液中粒子表面的电位，或形成空间限制效应，增大粒子间的排斥力，使由分散粒子组成的凝集结构中包裹的游离水释放出来，从而在粒子间起润滑作用和分散粒子的作用。
作为本发明的一种实施方式，所述结合剂的使用流程为将结合剂和干式料原料按比例配置在容器中，在干燥状态下直接进行搅拌，五到八分钟后观察搅拌是否均匀，均匀后向容器中加水，加水后继续搅拌五分钟，最后浇注振动制成干式料。
作为本发明的一种实施方式，所述结合剂的使用流程中的加水量控制在6％以下。
作为本发明的一种实施方式，所述干式料需要使用120℃的锅炉烘干两至三天，再使用1600℃的锅炉对其进行热处理三至五个小时。
具体工作原理：
中间包1的内部表面振动填充干式料并压实，构成工作层，挡渣墙2、挡渣坝3、长水口4和冲击垫5不进行填充。
醚基聚羧酸脂分子接近阳离子时，就会把其覆盖有非离子性侧链的具有表面活性作用的带负电的阴离子球壳，通过静电作用吸附到阳离子表面上；当醚基聚羧酸脂分子分子接近阴离子或不带电的非离子分子，它将通过搭接氢桥的方式将其带有活化作用的非离子球壳留到聚醚侧链上，因而具有很高的活性，在水中易形成负价氢离子和正价元素离子，并在常温下发生化学反应构成网状结构，使干式料发生硬化，在常温下具有较高强度，且网状结构不会随热处理温度的提高而拆散，反而受高温影响，脱氢后重新结合，从而使干式料在整个温度范围内都具有较高强度。
铝酸钙水泥是以一铝酸钙或二铝酸钙为主要矿物成分的水泥，低铁型铝酸钙的水泥含铁率小于2％，它是以天然铝矾土与碳酸钙按一定比例混合，经煅烧或电熔制作而成。
外加剂主要是帮助结合剂发挥强化效应，可以起到改进性能的作用，要求掺量少，不良影响少；为了获得性能更好的干式料，应适当选择增塑剂、分散剂、防爆剂、硬化剂和反散凝剂等外加剂，增强干式料的增塑程度、分散效果、防爆能力、硬化速度和反散凝作用。
可采用感应炉动态抗渣试验来评价干式料的抗渣侵蚀性，将干式料镶嵌在坩埚炉衬中，坩埚底部放入钢块，上面覆盖钢包渣；钢块完全融化时抗渣试验结束，钢渣的成分为：氧化钙约47％、二氧化硅约14％、氧化铝约10％、氧化镁约5％、氧化铁约26％、氧化锌约3％、氧化钾约0.1％、氧化纳约0.6％。
相对于现有技术中使用葡萄糖作为结合剂的主要材料，本发明作为中间包干式料的结合剂时，不仅减少给钢水的增碳增氢，且满足冶炼碳含量较低的钢种需求，高温使用时不产生甲酚、甲醛等刺激性气味，对环境无污染；抗侵蚀性能良好、容易解体、结合强度和中温强度均满足脱模要求，有效避免了干式料中温在线烘烤时抗折强度和耐压强度下降的问题，热处理后的抗折强度、耐压强度均显著提高，有效解决了葡萄糖结合剂脱模后衬体强度偏低的问题。
本发明的实施方式是为了示例和描述起见而给出的，尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。
Claims (9)
1.一种连铸中间包干式料环保型结合剂，其特征在于，所述结合剂的原料组成为：
醚基聚羧酸脂0.1-0.5％，氧化铝微粉20％，低铁型铝酸钙水泥3-6％，二氧化硅1-5％，氧化钙1-5％，磷酸钙0.1-0.5％。
2.如权利要求1所述一种连铸中间包干式料环保型结合剂，其特征在于，所述结合剂适用的干式料以板状刚玉颗粒为主要原料，氧化铝的含量大于99.0％，板状刚玉颗粒的大小组成为：粒度在3mm至5mm之间占比30％，粒度在1mm至3mm之间占比30％，粒度小于1mm的占比40％。
3.如权利要求1所述一种连铸中间包干式料环保型结合剂，其特征在于，所述低铁型铝酸钙水泥中的铁元素含量低于2％。
4.如权利要求1所述一种连铸中间包干式料环保型结合剂，其特征在于，所述结合剂中添加甲基纤维素3％作为增塑剂。
5.如权利要求1所述一种连铸中间包干式料环保型结合剂，其特征在于，所述结合剂中添加碳酸钠0.5-1％作为促凝剂。
6.如权利要求1所述一种连铸中间包干式料环保型结合剂，其特征在于，所述结合剂中添加木质素磺酸钙0.5-1.5％作为分散剂。
7.如权利要求1所述一种连铸中间包干式料环保型结合剂，其特征在于，所述结合剂的使用流程为将结合剂和干式料原料按比例配置在容器中，在干燥状态下直接进行搅拌，五到八分钟后观察搅拌是否均匀，均匀后向容器中加水，加水后继续搅拌五分钟，最后浇注振动制成干式料。
8.如权利要求7所述一种连铸中间包干式料环保型结合剂，其特征在于，所述结合剂的使用流程中的加水量控制在6％以下。
9.如权利要求7所述一种连铸中间包干式料环保型结合剂，其特征在于，所述干式料需要使用120℃的锅炉烘干两至三天，再使用1600℃的锅炉对其进行热处理三至五个小时。
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