基于圖像處理的礦石顆粒三維微觀孔隙結構演化

楊保華; 吳愛祥; 繆秀秀

doi:10.13374/j.issn2095-9389.2016.03.005

基于圖像處理的礦石顆粒三維微觀孔隙結構演化

doi: 10.13374/j.issn2095-9389.2016.03.005

楊保華^1,2,
吳愛祥^2,3, ,,
繆秀秀^2,3

1. 湖南涉外經濟學院信號與信息處理研究所, 長沙 410205;
2. 北京科技大學土木與環境工程學院, 北京 100083;
3. 北京科技大學金屬礦山高效開采與安全教育部重點實驗室, 北京 100083

基金項目:

湖南省自然科學基金資助項目(14JJ4064)

國家自然科學基金資助項目(51304076)

詳細信息

通訊作者:
吳愛祥,E-mail:wuaixiang@126.com

中圖分類號: TF803.21
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- 被引次數: 0
出版歷程
- 收稿日期: 2015-02-14
- 網絡出版日期: 2021-07-10

3D micropore structure evolution of ore particles based on image processing

YANG Bao-hua^1,2,
WU Ai-xiang^{2,3
, ,},
MOU Xiu-xiu^2,3

1. Institute of Signal and Information Processing, Hunan International Economics University, Changsha 410205, China;
2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. Key Laboratory of High-efficient Mining and Safety of Metal Mines(Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要:
采用高精度顯微CT技術及三維圖像分析方法研究氧化銅礦石顆粒在酸浸前后內部微觀孔隙結構特征及其演變,考察孔隙率、孔隙尺寸分布、孔隙連通度、孔隙分維等參數的變化規律.結果表明：酸浸后礦石顆粒的孔隙率明顯增加,孔隙尺寸分布范圍更廣,出現一定比例的大孔隙,平均孔隙直徑增加2~3倍;孔隙連通度在酸浸前基本為零,酸浸后明顯增加,并在各方向上呈現空間變異性;孔隙分維數在浸出結束后也有所增大,且在一定范圍內與孔隙率及平均孔隙直徑呈指數增長關系.借助三維圖像分析可實現礦石浸出過程中內部微觀孔隙結構的定量描述,從而揭示礦石顆粒孔隙結構的演化規律.
- 銅礦處理 /
- 顆粒 /
- 浸出 /
- 孔隙結構 /
- CT技術 /
- 圖像處理
Abstract:
The micropore structure and evolution of copper oxide ore particles before and after acid leaching were investigated by high resolution X-ray micro-computed tomography(micro-CT) and three-dimensional(3D) image analysis. The pore structure parameters,such as porosity,pore size distribution,pore connectivity and fractal dimension were statistically calculated. The results indicate that after acid leaching,the porosity increases obviously and the pore size distributes more widely. Some large pores appear and the mean pore diameter increases by 2 to 3 times. There is little pore connectivity before acid leaching,while the pore connectivity increases significantly after acid leaching,being inhomogeneous in three different directions. The fractal dimension of pores also increases after acid leaching,and the porosity and the mean pore diameter grows exponentially with the fractal dimension. 3-D image analysis is a powerful technique to quantitatively characterize the micro-scale pore structure of ore particles during acid leaching,so it facilitates to disclosure the evolution laws of pore structure.
- copper ore treatment /
- particles /
- leaching /
- pore structure /
- computed tomography /
- image processing