| SiO_2添加剂对铝电解用炭间糊性能的影响 |
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| 引用本文： | 姚桢,刘卫,徐荣嬛,陈毅.SiO_2添加剂对铝电解用炭间糊性能的影响[J].有色金属工程,2018,8(2):11-15. |
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| 作者姓名： | 姚桢 刘卫 徐荣嬛 陈毅 |
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| 作者单位： | 贵州师范大学材料与建筑工程学院;贵州省铝电解炭素材料工程技术研究中心;贵州省无机非金属功能材料重点实验室 |
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| 基金项目： | 贵州省科学技术基金(编号：黔科合J字[2013]2221号) |
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| 摘 要： | 以电煅煤、熟碎、沥青焦为骨料,改质沥青和煤焦油为混合粘结剂,添加SiO_2制备铝电解用炭间糊,研究SiO_2含量对制备炭间糊基本性能、膨胀/收缩过程及微观结构的影响。结果表明,随着SiO_2含量的增加,糊料的灰分含量逐渐提高,表观密度和导电能力逐渐下降,耐压强度在24.11~34.33 MPa区间内呈无规律变化;热膨胀程度明显下降,炭化过程提前;SiO_2添加剂主要分布于骨料颗粒表面和粘结焦中。当SiO_2含量为4%时,膨胀/收缩率最优。
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| 关 键 词： | 炭间糊 SiO2添加量 膨胀/收缩过程 粘结焦 |
| 收稿时间： | 2016/10/31 0:00:00 |
| 修稿时间： | 2016/11/8 0:00:00 |
Effect of SiO2 Additive on Properties of Ramming Paste for Aluminum Electrolysis |
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| Affiliation: | Guizhou Normal University,Guizhou Engineering Research Center for Carbon Materials of Aluminum Electrolysis,Guizhou Normal University,Guizhou Normal University |
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| Abstract: | Ramming pastes was synthesized using calcined anthracite coal, baked scrap, coal derived pitch coke as aggregate; modified pitch, coal tar as binder and adding SiO2 powder. The effect of SiO2 addition on the basic properties, expansion/shrinkage process and microstructure of ramming paste were investigated. The results indicated that as the SiO2 addition increases, the ash and electrical resistivity increases, bulk density, compressive strength, volume expansion and carbonized temperature decreases. The SiO2 additive is mainly distributed on the surface of aggregate particles and binding coke. The expansion/shrinkage rate of ramming paste reached an excellent level when the addition of SiO2 was 4%. |
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| Keywords: | ramming paste SiO2 addition expansion/shrinkage process binding coke |
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