工程科学学报Issue(3)：275-280,6.DOI:10.13374/j.issn2095-9389.2015.03.002
基于核磁共振成像技术的堆浸细观渗流速度场特性
Mesoscopic seepage velocity characteristics during heap leaching based on magnetic resonance imaging
摘要
Abstract
Column leaching seepage processes were detected in a non-contact and non-destructive way by magnetic resonance ima-ging. Column leaching images were obtained when the flow was stationary and running. Mesoscopic seepage velocity field distribution characteristics and velocity field evolution rules inside pores were studied by analyzing the velocity value distribution, flow velocity dis-tribution uniformity, and relationship between evenness index and spray intensity. The research shows that the velocity distribution has obvious inhomogeneity, and the flow velocity value is not in accordance with the pore size strictly. The flow velocity distribution is sim-ilar for different spray intensities. There is a positive correlation between the maximum velocity and spray intensity. A spray intensity threshold can be obtained by analyzing the relationship between velocity field uniformity and spray intensity. The value of 0. 7 L·cm - 2·h - 1 is the intensity threshold of the designated graded distribution. Field applications of dynamic spray intensity can obvious-ly improve the permeability of dumps and the leaching rate of copper.关键词
渗流/流速/堆浸/核磁共振成像/铜Key words
seepage/flow velocity/heap leaching/magnetic resonance imaging/copper分类
矿业与冶金引用本文复制引用
尹升华,薛振林,吴爱祥,刘超,李红..基于核磁共振成像技术的堆浸细观渗流速度场特性[J].工程科学学报,2015,(3):275-280,6.基金项目
国家自然科学基金资助项目(51374035) （51374035）
新世纪优秀人才支持计划资助项目(NCET-13-0669) （NCET-13-0669）
