CN105925012B - 一种改性超细重质碳酸钙的制备方法 - Google Patents
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Abstract
本发明公开了一种改性超细重质碳酸钙的制备方法，通过在制备过程中添加抗氧化剂、云母粉和丙二醇，制备的重质碳酸钙粉粒度在0.5‑10微米，耐候性强，在极限气温条件下仍可使用，可用于纺织、医药、涂料等多种行业。
Description
技术领域
本发明涉及耐火材料技术领域，尤其涉及一种钢包砖及其制备方法。
背景技术
近年来，重质碳酸钙是用物理方法而得到的碳酸钙产品，一般是采用纯度高的石灰石（如方解石、白垩等）进行研磨，重质碳酸钙的密度比轻质碳酸钙要重，沉降体积较低。目前，碳酸钙已广泛用于造纸、塑料、塑料薄膜、化纤、橡胶、胶黏剂、密封剂、日用化工、化妆品、建材、涂料、油漆、油灰、封蜡、腻子、包装、医药、食品、饲料中，其作用有：增加产品体积、降低成本，改善加工性能，提高尺寸稳定性，补强或半补强，提高印刷性能，提高物理性能等。
但目前建材、涂料等行业在生产、施工工程中遇到0℃以下或者是40℃以上的极限工作条件下，重质碳酸钙往往会出现凝聚等无法使用的现象，故有必要研发一种耐候性极强的重质碳酸钙。
发明内容
为满足市场需求，克服重质碳酸钙在极限温度下无法应用等问题，本发明提供了一种改性超细重质碳酸钙的制备方法。
一种改性超细重质碳酸钙的制备方法，包括以下步骤：
A、将方解石进行粉碎，得到直径为3mm以下的碳酸钙粗料；
B、将碳酸钙粗料、水、分散剂充分混合后，泡浆20-30min；
C、将浆料放入球磨机内进行湿法研磨，加入抗氧化剂和云母粉，搅拌机的线速度为1-2m/s，研磨时间为10-15min；
D、将浆料放入搅拌式研磨机内进行湿法研磨，搅拌机的线速度为5-7m/s，研磨时间为25-30min；
E、将浆料放入砂磨机内，加入稳定剂，进行湿法研磨，搅拌机的线速度为10-12 m/s，研磨时间为40-45min；
F、利用喷雾干燥设备将浆料和丙二醇进行喷雾干燥，干燥温度为150-200℃，收集改性超细重质碳酸钙粉。
优选的，所述的步骤B中的分散剂为科宁润湿剂875；
优选的，所述的步骤B中，碳酸钙粗料、水、分散剂的质量比为55-70：30-45：0.1-0.5；
优选的，所述的步骤C中云母粉的粒径为80目；
优选的，所述的步骤C中的抗氧化剂为受阻酚类抗氧化剂；
优选的，所述的步骤C中，浆料、抗氧化剂、云母粉的质量比为95-98：3-4：1-2；
优选的，所述的步骤E中，所述的稳定剂为无铅稳定剂，加入的质量为浆料的1-3%；
优选的，所述的步骤F中丙二醇的加入量为浆料的10-15%；
优选的，所述的步骤F中的重质碳酸钙粉的粒径为0.5-10微米。
本发明中加入抗氧化剂，可以提高重质碳酸钙在高温下的抗粘结性能，防止出现颗粒团聚现象，为了加强抗氧化剂的效果，加入云母粉一起研磨，可以起到一定的保护和缓释效果，延长抗氧化剂的使用时间。
云母粉是一种非金属矿物，含有多种成分，其中主要有SiO2，含量一般在49%左右，Al2O3含量在30%左右。云母粉具有良好的弹性、韧性。绝缘性、耐高温、耐酸碱、耐腐蚀、附着力强等特性，是一种优良的添加剂。它广泛地应用于电器、电焊条、橡胶、塑料、造纸、油漆、涂料、颜料、陶瓷、化妆品、新型建材等行业，用途极其广泛。随着科学技术的不断发展，人们开辟出新的应用领域。云母粉是一种层状结构的硅酸盐，结构由两层硅氧四面体夹着一层铝氧八面体构成的复式硅氧层。解理完全，可劈成极薄的片状，片厚可达1μm以下（理论上可削成0.001μm），径厚比大。
本发明中加入云母粉一起研磨，可以利用其层状结构，给受阻酚类抗氧化剂一定的空间进行保护，同时还具备一定的缓释作用。
由于砂磨机研磨的粒度过小，为防止凝集，需加入稳定剂。
丙二醇是一种常用的抗冻剂，本发明中加入丙二醇，一方面是作为抗冻剂提高重质碳酸钙在低温下的抗粘结性能，防止出现颗粒团聚现象；另一方面，由于浆料中的重质碳酸钙粒径较小，通过实验发现将重质碳酸钙浆料和丙二醇按一定比例进行混合喷雾干燥造粒，形成的小颗粒，重质碳酸钙在内，丙二醇在外，使用时，抗冻效果及润滑效果更佳。
相比于乙二醇，丙二醇的极性较弱，与重质碳酸钙造粒后结合效果更佳，同时丙二醇对人体的危害小很多。
本发明提供的改性超细重质碳酸钙，通过各组分以及各组分特定配比的组合，相比市场上的原有产品，具有更好的耐低温与耐高温性能，可以满足极限条件下的生产需要。
具体实施方式
实施例1：
一种改性超细重质碳酸钙的制备方法，包括以下步骤：
A、将方解石进行粉碎，得到直径为3mm以下的碳酸钙粗料；
B、将碳酸钙粗料、水、分散剂充分混合后，泡浆25min；
C、将浆料放入球磨机内进行湿法研磨，加入抗氧化剂和云母粉，搅拌机的线速度为1.5m/s，研磨时间为15min；
D、将浆料放入搅拌式研磨机内进行湿法研磨，搅拌机的线速度为6m/s，研磨时间为25min；
E、将浆料放入砂磨机内，加入稳定剂，进行湿法研磨，搅拌机的线速度为10 m/s，研磨时间为45min；
F、利用喷雾干燥设备将浆料和丙二醇进行喷雾干燥，干燥温度为180℃，收集改性超细重质碳酸钙粉。
所述的步骤B中的分散剂为科宁润湿剂875；
所述的步骤B中，碳酸钙粗料、水、分散剂的质量比为60：39.8：0.2；
所述的步骤C中云母粉的粒径为80目；
所述的步骤C中的抗氧化剂为受阻酚类抗氧化剂；
所述的步骤C中，浆料、抗氧化剂、云母粉的质量比为96：3：1；
所述的步骤E中，所述的稳定剂为无铅稳定剂，加入的质量为浆料的2.5%；
所述的步骤F中丙二醇的加入量为浆料的13%；
所述的步骤F中的重质碳酸钙粉的粒径为0.5-10微米。
实施例2：
一种改性超细重质碳酸钙的制备方法，包括以下步骤：
A、将方解石进行粉碎，得到直径为3mm以下的碳酸钙粗料；
B、将碳酸钙粗料、水、分散剂充分混合后，泡浆20min；
C、将浆料放入球磨机内进行湿法研磨，加入抗氧化剂和云母粉，搅拌机的线速度为2m/s，研磨时间为10min；
D、将浆料放入搅拌式研磨机内进行湿法研磨，搅拌机的线速度为5m/s，研磨时间为30min；
E、将浆料放入砂磨机内，加入稳定剂，进行湿法研磨，搅拌机的线速度为10m/s，研磨时间为40min；
F、利用喷雾干燥设备将浆料和丙二醇进行喷雾干燥，干燥温度为150-200℃，收集改性超细重质碳酸钙粉。
所述的步骤B中的分散剂为科宁润湿剂875；
所述的步骤B中，碳酸钙粗料、水、分散剂的质量比为55：35：0.5；
所述的步骤C中云母粉的粒径为80目；
所述的步骤C中的抗氧化剂为受阻酚类抗氧化剂；
所述的步骤C中，浆料、抗氧化剂、云母粉的质量比为95：3：2；
所述的步骤E中，所述的稳定剂为无铅稳定剂，加入的质量为浆料的3%；
所述的步骤F中丙二醇的加入量为浆料的10%；
所述的步骤F中的重质碳酸钙粉的粒径为0.5-10微米。
实施例3：
一种改性超细重质碳酸钙的制备方法，包括以下步骤：
A、将方解石进行粉碎，得到直径为3mm以下的碳酸钙粗料；
B、将碳酸钙粗料、水、分散剂充分混合后，泡浆20min；
C、将浆料放入球磨机内进行湿法研磨，加入抗氧化剂和云母粉，搅拌机的线速度为1m/s，研磨时间为15min；
D、将浆料放入搅拌式研磨机内进行湿法研磨，搅拌机的线速度为7m/s，研磨时间为25min；
E、将浆料放入砂磨机内，加入稳定剂，进行湿法研磨，搅拌机的线速度为10-12 m/s，研磨时间为40-45min；
F、利用喷雾干燥设备将浆料和丙二醇进行喷雾干燥，干燥温度为150-200℃，收集改性超细重质碳酸钙粉。
所述的步骤B中的分散剂为科宁润湿剂875；
所述的步骤B中，碳酸钙粗料、水、分散剂的质量比为70：40：0.1；
所述的步骤C中云母粉的粒径为80目；
所述的步骤C中的抗氧化剂为受阻酚类抗氧化剂；
所述的步骤C中，浆料、抗氧化剂、云母粉的质量比为98：4：2；
所述的步骤E中，所述的稳定剂为无铅稳定剂，加入的质量为浆料的1%；
所述的步骤F中丙二醇的加入量为浆料的15%；
所述的步骤F中的重质碳酸钙粉的粒径为0.5-10微米。
经测试：本发明的改性超细重质碳酸钙保质期长达5年以上；保质期内，在-20-70℃之间均可正常使用。本发明的改性超细重质碳酸钙加入粉末涂料中使用，其耐候性能比加入未经改性的重质碳酸钙大大增强。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种改性超细重质碳酸钙的制备方法，其特征在于，包括以下步骤：
A、将方解石进行粉碎，得到直径为3mm以下的碳酸钙粗料；
B、将碳酸钙粗料、水、分散剂充分混合后，泡浆20-30min；
C、将浆料放入球磨机内进行湿法研磨，加入抗氧化剂和云母粉，搅拌机的线速度为1-2m/s，研磨时间为10-15min；
D、将浆料放入搅拌式研磨机内进行湿法研磨，搅拌机的线速度为5-7m/s，研磨时间为25-30min；
E、将浆料放入砂磨机内，加入稳定剂，进行湿法研磨，搅拌机的线速度为10-12 m/s，研磨时间为40-45min；
F、利用喷雾干燥设备将浆料和丙二醇进行喷雾干燥，干燥温度为150-200℃，收集改性超细重质碳酸钙粉。
2.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤B中的分散剂为科宁润湿剂875。
3.如权利要求2所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤B中，碳酸钙粗料、水、分散剂的质量比为55-70：30-45：0.1-0.5。
4.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤C中云母粉的粒径为80目。
5.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤C中的抗氧化剂为受阻酚类抗氧化剂。
6.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤C中，浆料、抗氧化剂、云母粉的质量比为95-98：3-4：1-2。
7.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤E中，所述的稳定剂为无铅稳定剂，加入的质量为浆料的1-3%。
8.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤F中丙二醇的加入量为浆料的10-15%。
9.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的步骤F中的重质碳酸钙粉的粒径为0.5-10微米。
10.如权利要求1所述的改性超细重质碳酸钙的制备方法，其特征在于，所述的重质碳酸钙粉应用于粉末涂料。
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| CN103525136A (zh) * | 2013-09-17 | 2014-01-22 | 池州市大恒生化有限公司 | 一种超细改性重质碳酸钙的制备方法 |
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| DE102007016595A1 (de) * | 2007-04-05 | 2008-10-09 | Deutsche Amphibolin-Werke Von Robert Murjahn Stiftung & Co Kg | Wasserverdünnbarer Lackspachtel auf Alkydharz-Basis |
| CN103300071A (zh) * | 2013-06-20 | 2013-09-18 | 武汉大学 | 固定溶菌酶-累托石的纳米纤维复合膜的制备方法 |
| CN103525136A (zh) * | 2013-09-17 | 2014-01-22 | 池州市大恒生化有限公司 | 一种超细改性重质碳酸钙的制备方法 |
| CN104744971A (zh) * | 2015-03-04 | 2015-07-01 | 江西科越科技有限公司 | 湿法超微细改性碳酸钙制备工艺 |
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