溶液窜流对浸堆内细观流场的影响规律

甘德清; 段晓鹏; 薛振林; 刘志义; 闫泽鹏

doi:10.12075/j.issn.1004-4051.2021.10.010

溶液窜流对浸堆内细观流场的影响规律

甘德清^1,2,
段晓鹏^1,2, ,,
薛振林^1,2,
刘志义^1,2,
闫泽鹏^1,2

1. 华北理工大学矿业工程学院, 河北唐山 063200;
2. 河北省矿业开发与安全技术重点实验室, 河北唐山 063009

基金项目:

国家自然科学基金资助(编号：51804121；51774137)；河北省自然科学基金资助(编号：E2016209277)

详细信息

第一作者简介:
甘德清(1962-)，男，博士，教授，博士生导师，主要从事采矿工艺方面的教学与研究工作，E-mail：gdqheut@163.com。

通讯作者简介:
段晓鹏(1997-),男,汉族,河北衡水人,硕士研究生,主要从事采矿工艺方面的研究工作,E-mail:dxp199704@163.com

中图分类号: TD925
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出版历程
- 收稿日期: 2020-06-27
- 网络出版日期: 2023-04-18

Influence law of the channeling of solution on the meso-flow field in leaching reactor

1. School of Mining Engineering, North China University of Science and Technology, Tangshan 063200, China;
2. Mining Development ang Safety Technology Key Lab of Hebei Province, Tangshan 063009, China

摘要

摘要: 为了探究窜流对矿石浸堆内部细观渗流场分布的影响，基于核磁共振技术获取了堆内细观矿石堆积结构，并通过CFD软件对窜流影响下的渗流场进行数值模拟，分析了窜流影响下喷淋强度和窜流系数对流场分布的影响。结果表明：窜流作用下矿石内部溶液发生缓慢流动，通过溶液在矿-液界面的交换，扩大了渗流场范围，增加了溶液在浸堆内反应的时间，使溶液充分与有用矿物接触，提高了有用物质的浸出率；缓流区和出口边界处流速增加，快速流动区域流速减小，有漩流动增强。在窜流作用下，喷淋强度增加能够促进渗流场中溶液流动，涡流范围的增大。窜流系数的增加有助于流场均匀分布，缓流区流动加快，快速流动区流速降低，在一定程度上可以抑制优势流的发生。
- 浸堆 /
- 核磁共振 /
- 渗流场 /
- 窜流
Abstract: In order to explore the influence of channeling on the distribution of the meso-seepage field inside the leaching reactor, the meso-scale ore accumulation structure in the reactor is obtained based on nuclear magnetic resonance technology, and the seepage field under the influence of channeling is numerically simulated by CFD software.The influence of spray intensity and channeling coefficient on flow field distribution is analyzed.The results show that the solution inside the ore flows slowly under the action of channeling.The exchange of the solution at the ore-liquid interface expands the range of the seepage field, increases the reaction time of the solution in the leaching pile, makes the solution fully contact with useful minerals, and improves the usefulness.The leaching rate of the substance, the flow velocity at the slow flow zone and the exit boundary increases, the velocity of the fast flow zone decreases, and the swirling flow increases.Under the effect of channeling, the increase of spray intensity can promote the flow of solution in the seepage field and increase the vortex range.The increase of the channeling coefficient helps the flow field to be evenly distributed, the flow in the slow flow zone is accelerated, and the flow velocity in the fast flow zone is reduced, which can inhibit the occurrence of dominant flow to a certain extent.
- leaching reactor /
- nuclear magnetic resonance (NMR) /
- seepage field /
- channeling

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