| 超细煤粉颗粒形状分形维数与球磨工艺的研究 |
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| 引用本文： | 杨志远,曲建林,周安宁.超细煤粉颗粒形状分形维数与球磨工艺的研究[J].煤炭学报,2004,29(3):342-345. |
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| 作者姓名： | 杨志远 曲建林 周安宁 |
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| 作者单位： | 西安科技大学,材料科学与工程系,陕西,西安,710054 |
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| 基金项目： | 国家自然科学基金资助项目(20276056)，陕西省教育厅专项科研基金资助项目(03JK190) |
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| 摘 要： | 在行星磨完成不同煤的超细粉碎．基于面积一周长法，利用煤粉颗粒的SEM图像结合图像分析软件计算不同工艺条件下的煤粉体的颗粒形状分形维数，结果表明：该方法计算的分维值相关系数多在0．95以上；煤颗粒形状分形是多域度分形；煤颗粒粉碎初期形状分形维数逐渐减小，当粉碎到团聚时间时，其分形维数值反而在增大；含碳量高的煤质在粉碎时，其形状分形维数一般较小；不同助磨剂对颗粒形状分形的影响不同．
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| 关 键 词： | 超细煤粉 颗粒形状分形 球磨工艺 行星磨 |
| 文章编号： | 0253-9993(2004)03-0342-04 |
| 修稿时间： | 2003年9月18日 |
Study on the relationships between the profile fractal dimensions of coal ultra-fine powders and their grinding technologies |
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| YANG Zhi-yuan,QU Jian-lin,ZHOU An-ning.Study on the relationships between the profile fractal dimensions of coal ultra-fine powders and their grinding technologies[J].Journal of China Coal Society,2004,29(3):342-345. |
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| Authors: | YANG Zhi-yuan QU Jian-lin ZHOU An-ning |
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| Abstract: | The different coals were pulverized into ultra-fine powders on a planetary mill. On the basis of SEM photographs and image analysis software, the profile fractal dimensions of coal ultra-fine particles were calculated by using the Area-Perimeter Method, which produced in different grinding technologies. The results indicated that the Area-Perimeter Method can apply in calculation of the fractal dimensions with its correlated coefficient over 0.95; the profiles of coal particles are multifractals; in the initial period the fractal dimensions decrease with the time whereas the fractal dimensions of coal agglomerates increase with the time; in grinding, the profile fractal dimensions of coal particles with high carbon content, and different grinding assistant additives have different effects for the profile fractal dimensions. |
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| Keywords: | ultra-fine coal powder profile fractal dimension grinding technologies planetary mill |
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