外加电场对细粒散体中溶浸液渗流特性的影响机制

项目名称： 外加电场对细粒散体中溶浸液渗流特性的影响机制

项目编号： No.51304011

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 王少勇

作者单位： 北京科技大学

项目金额： 25万元

中文摘要： 本项目主要针对目前低渗透性细粒散体浸堆浸出过程面临的问题，尤其是基础理论研究方面的问题，综合运用动电理论、散体动力学、渗流力学、岩石力学和生物化学等多学科知识，研制一套电场强化渗流多功能试验装置，对电场作用下矿岩的电学性质、散体中孔裂隙的演化规律、溶液渗流动力特性、物理化学反应特性、固-液-电动态耦合机理开展系统研究，建立电场-渗流场-孔隙演化场耦合作用下的溶浸液渗流模型，探寻电场作用下浸出过程中溶浸液渗流动力响应特征，揭示流动-反应-变形耦合过程中外加电场对细粒散体中溶浸液流动特性的影响机制，最后提出电场强化细粒散体中溶浸液渗流技术原型。本项目将对电场作用下细粒散体浸出体系中溶浸液的渗流特性进行定量表征，实现电场对细粒散体堆浸体系中溶浸液渗流行为的调节与控制。为解决堆浸体系中渗透性差的技术难题提供理论指导，推动金属矿溶浸开采技术的进步。

中文关键词： 电场；细粒散体；堆浸；渗流特性；

英文摘要： Focused on the issues of low-permeability, fine-grain ore heap leaching, especially on theoretical aspect, this project develops an electric field intensified seepage apparatus and establishes an electric - fluid flow - pore and fracture evolution coupled leaching model, aiming to reveal the mechanism of electric field's effect on flow through fine-grain ore heap. Based on the theories of electrokinetics, granular dynamics, fluid mechanics in porous medium, rock mechanics and biochemistry, researches are conducted with respect to ore's electrical properties, pore and fracture evolution, solution seepage, physical chemistry reaction features and the electric field coupled solid-liquid system; the fluid flow response mechanism under the effects of electric field, reaction and deformation is then discovered.An quantitive description of the fluid flow in the fine-grain leaching system under electric field is obtained, which provides foundation of regulation and control on the fluid flow and acts as theoretical guidance for solving the low permeability issues of heap leaching. The achievements of this project will promote the development leaching mining.

英文关键词： electric field；fine granulas；heap leaching；seepage characteristic；