(1. 華北理工大學 礦業(yè)工程學院，唐山 063210；
2. 福州大學 紫金礦業(yè)學院，福州 350116)
摘 要: 為了揭示礦石與溶液界面微滲透作用對礦石間細觀流場分布影響，基于堆內(nèi)實測結(jié)構(gòu)構(gòu)建了浸礦結(jié)構(gòu)物理模型，利用粒子圖像測速技術(shù)(PIV)對結(jié)構(gòu)內(nèi)溶液滲流場進行無損探測。結(jié)果表明：在礦-液界面持續(xù)的微滲透作用下，速度場的均衡性顯著提高，優(yōu)勢流的發(fā)生得到抑制，浸出盲區(qū)大幅降低，最大流速下降50%；界面的微流動使得流場中有漩流動區(qū)域大幅提高，渦量值分布呈現(xiàn)貼壁性，渦量同向聚集且邊緣方向突變時形成漩渦；在實驗的噴淋強度范圍內(nèi)，結(jié)構(gòu)內(nèi)流速分布均勻性和最大流速值會隨著噴淋強度的增加而提高。
關(guān)鍵字: 堆浸；微滲透；滲流；優(yōu)先流；無損探測
（1. College of Mining Engineering, North China University of Science and Technology, Tangshan 063210, China;
2. College of Zijin Mining, Fuzhou University, Fuzhou 350116, China）
Abstract:In order to reveal the effect of micro-infiltration at the interface between ore and solution on the microscopic flow field distribution in the ore particles, the leaching structure model was established based on the measured structure in leaching heap, and the solution flow behavior during heap leaching was detected in a non-destructive detection way by using PIV technique. The results show that, under the continuous micro-infiltration at the mineral-liquid interface, the equilibrium of the velocity field is significantly improved, the occurrence of the preferential flow is suppressed, the leaching blind zone is greatly reduced, and the maximum flow velocity is reduced by 50%. The swirling flow area is greatly improved under the effect of micro-infiltration, and the vorticity distribution presents adherent. A vortex is formed when the vortices gather in the same direction and the edge direction changes. Within the spray intensity range of the experiment, the uniformity of flow velocity distribution and the maximum flow velocity value will increase with the increase of spray intensity.
Key words: heap leaching; micro-infiltration; seepage; preferential flow; non-destructive detection
