| 引用本文: | 欧玉静,彭莉,李春雷,赵海涛,苏鹏程,高鹏.利用铝灰和微硅粉制备4A分子筛的研究[J].材料科学与工艺,2023,31(5):45-52.DOI:10.11951/j.issn.1005-0299.20220141. |
| OU Yujing,PENG Li,LI Chunlei,ZHAO Haitao,SU Pengcheng,GAO Peng.Preparation of 4A molecular sieve using aluminum ash and microsilica powder[J].Materials Science and Technology,2023,31(5):45-52.DOI:10.11951/j.issn.1005-0299.20220141. |
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| 摘要: |
| 铝灰和微硅粉分别是铸造铝和硅铁合金冶炼过程中产生的固体废弃物,含有丰富的氧化铝和氧化硅,为了符合国家环保要求以及资源再生化利用,通过从铝灰和微硅粉中提取氧化铝、氧化硅,并以此为原料制备4A分子筛。通过水热法探究最佳工艺条件,制备出了符合国家行业标准的4A分子筛,并对其分别进行了XRD、FTIR、SEM及BET表征,测定了钙离子交换能力。结果表明:在硅铝比(n(SiO2)/n(Al2O3))2.0、碱度(n(Na2O)/n(Al2O3))2.5、晶化温度100 ℃、晶化时间10 h的条件下制备的4A分子筛具有清晰的、均匀的立方晶型结构及良好的钙离子交换能力(362 mg CaCO3/g),可用作洗涤助剂,为固体废弃物的资源化利用提供了新思路。 |
| 关键词: 固体废弃物 资源化 铝灰 微硅粉 4A分子筛 钙离子交换量 |
| DOI：10.11951/j.issn.1005-0299.20220141 |
| 分类号:X781.1 |
| 文献标识码:A |
| 基金项目:甘肃省重点研发项目(17YF1FA123). |
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| Preparation of 4A molecular sieve using aluminum ash and microsilica powder |
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OU Yujing1, PENG Li1, LI Chunlei1, ZHAO Haitao2, SU Pengcheng2, GAO Peng2
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(1. College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. Sinohydro Bureau 6 Co., Ltd., Shenyang 110000, China)
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| Abstract: |
| Aluminum ash and microsilica powder are solid wastes generated during the smelting of foundry aluminum and ferrosilicon alloys respectively, which are rich in alumina and silicon oxide. Considering the national environmental protection requirements and resource recycling and utilization, alumina and silicon oxide were extracted from aluminum ash and microsilica powder and used as raw materials to prepare 4A molecular sieves. The hydrothermal method was adopted to investigate the best process conditions, and the obtained 4A molecular sieve could meet the national industry standards.The 4A molecular sieve was characterized by XRD, FTIR, SEM, and BET to determine the calcium ion exchange capacity. Results showed that the 4A molecular sieve prepared under the conditions of silicon to aluminum ratio (n(SiO2)/n(Al2O3)) 2.0, alkalinity (n(Na2O)/n(Al2O3)) 2.5, crystallization temperature 100 ℃, and crystallization time 10 h had a clear and uniform cubic crystal structure and good calcium ion exchange capacity (362 mg CaCO3/g). It can be used as washing aid, which provides a new idea for the resource utilization of solid wastes. |
| Key words: solid waste resource utilization aluminum ash microsilica powder 4A molecular sieve calcium ion exchange capacity |
