| Author Name | Affiliation | | Yuanjun Zhang | School of Energy and Power Engineering, Shandong University, Jinan 250061, China | | Dakai Wang | School of Energy and Power Engineering, Shandong University, Jinan 250061, China | | Xingxing Cheng | School of Energy and Power Engineering, Shandong University, Jinan 250061, China | | Zhiqiang Wang | School of Energy and Power Engineering, Shandong University, Jinan 250061, China |
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| Abstract: |
| The effect of Fe2O3 on the formation of micro glass beads (MGBs) under air staged combustion was studied. The experimental temperature was 1450 ℃, and Hegang bituminous coal was used as the experimental object. X-ray diffractometer (XRD), ash fusion tester, viscosity formula and scanning electron microscopy (SEM) were used to analyze the fly ash. Nano Measurer 1.2 software was used to measure the diameter of MGBs. The results showed that with the increase of Fe2O3 in Hegang coal, the glass phase in fly ash first increased and then decreased. When the amount of Fe2O3 was 15%, the content of the glass phase was the highest, which was 51.26%. The ash melting point first decreased and then increased, while the viscosity gradually decreased and the particles gradually became spherical. With the increase of Fe2O3, the proportion of MGBs with particle size less than 10 μm increased gradually. From the above results, it can be concluded that the addition of Fe2O3 is conducive to the formation of MGBs and the reduction of particle size. |
| Key words: micro glass beads fly ash Fe2O3 air staged combustion |
| DOI：10.11916/j.issn. 1005-9113.21049 |
| Clc Number:TK01+9 |
| Fund: |
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| Descriptions in Chinese: |
| 空气分级燃烧条件下Fe2O3对玻璃微珠生成的影响 张远军，王大凯，程星星，王志强* （山东大学能源与动力工程学院，济南 250061） 摘要：在空气分级燃烧条件下，研究了Fe2O3对玻璃微珠（MGBs）生成的影响。实验温度为1450℃，以鹤岗烟煤作为实验对象。利用X射线衍射仪（XRD）、灰熔融测试仪、粘度公式和扫描电镜（SEM）对飞灰进行了分析。使用Nano-Measurer 1.2软件测量了玻璃微珠的直径。结果表明，随着鹤岗煤中Fe2O3含量的增加，飞灰中的玻璃相含量先增加后降低。当Fe2O3含量为15%时，玻璃相含量达到最高，为51.26%。灰熔点先降低后升高，而粘度逐渐降低，颗粒逐渐呈球形。随着Fe2O3含量的增加，粒径小于10μm的玻璃微珠比例逐渐增加。从以上结果可以得出结论，Fe2O3的加入有利于玻璃微珠的生成和粒径的减小。 关键词：玻璃微珠；飞灰；Fe2O3；空气分级燃烧 |
