江西某铜矿微生物堆浸过程中矿石内部特征的CT扫描  

Ore Sample Interior Characters by CT Scanning in Bioleaching from a Mine in Jiangxi

作　　者：习泳[1] 吴爱祥[2] 杨保华[3] 朱志根[3] 苏永定[3] 

机构地区：[1]中国有色工程设计研究总院,北京100038 [2]北京科技大学土木与环境工程学院,北京100083 [3]中南大学资源与安全工程学院,长沙410083

出　　处：《有色金属》2007年第4期82-86,共5页Nonferrous Metals

基　　金：国家重点基础研究发展规划项目(2004CB619200);国家杰出青年基金项目(50325415);国家创新群体项目(50321402)

摘　　要：利用螺旋CT机对未浸出反应和浸出反应后的硫化矿和氧化矿进行CT扫描试验。结果表明,在选择合适的扫描模式和参数下,可以对矿石内部微小孔隙、裂隙等微观尺度进行探测扫描和分析,并可利用相关软件进行三维重组仿真,进一步分析矿石内部微观尺度层面。分析CT照片得出,硫化矿石内部组织结构非常致密,微观尺度上的孔隙、裂隙很少,而氧化矿石内部组织疏松,自然裂隙、孔隙较丰富,这为溶浸液在矿石中对流与扩散提供了有利通道,有益于浸出反应。利用CT扫描柱浸所得到的横断面图像,进行相关的图像处理,可以分析得到柱浸中矿堆的孔隙率特征及其孔隙分布特征。The un-leached and leached sulfide and oxide ores are scanned with spiral CT machine ：（SIEMENS SOMATOM BALANCE）. The results indicate that under appropriate scanning pattern and parameters, the ore interior microholes and crevasses can be scanned and analyzed in microscopic criterion, and the three dimensional reorganization simulation can be conducted .with relevant software so as to analyze the ore interior microscopic criterion stratification plane It is Obtained .from the CT image analysis that the interior organizational structure of sulfide ore is extremely dense, and the holes and crevasses in microscopic criterion are very few, however the interior organizational structure of oxide ore is loose, and the natural crevasses and holes are more, which provides available channels for lixiviant convecting and diffusing in the ore that are beneficial for leaching action. Processing and analyzing the cross section images gotten by scanning column leaching with CT, the characteristics of porosity and pores distribution in column dump can be obtained.

关 键 词：冶金技术 铜 生物浸出 单一颗粒 CT扫描 内部特征 孔隙率 

分 类 号：TF811[冶金工程—有色金属冶金] TF803.21