studies the amount of reduction in the permeability of heap leaching structures drainage , in the effect of chemical parameter

Subject Areas :

آرش Razm-khah ¹ , مهران GHolinejad ² , مهدی Amini ³ , Ahmad Hekmat-Ravesh ⁴

1 - عضو هیئت علمی دانشگاه آزاد اسلامی واحد تهران جنوب
2 - عضو هیئت علمی دانشگاه آزاد اسلامی واحد تهران جنوب
3 - عضو هیئت علمی دانشگاه کاشان
4 - دانشجوی کارشناسی ارشد معدن دانشگاه آزاد اسلامی واحد تهران جنوب

Received: 2016-09-06 Accepted : 2016-09-06 Published : 2010-06-22

Keywords: heap leaching structures, gravel drainage, clogging,

Abstract :

Heap leaching structures use for accumulate and obtaining metals from ore. These structurescompose of different parts. Among those, creating a drainage layer in the mineral materialbed is very important. because during this long period the amount, of the permeability willdecrease, due to different factors. In addition to these factors, we also mention to the chemical,physical and biological factors. The author is trying to examine the effect of chemical factorson heap leaching structures drainage gravel, by simulating different parts of the leaching structures. Therefore, suitable cells are built for accumulating ore materials and drainage gravel.After flling these cells with the before said material during 6 months, acid is been irrigation onore material cells and the cell output is transferred to the input of the drainage gravel cells. Thepermanent washing of the ore material and the action and reaction, cause a chemical cloggingand also the closing of the pores of the drainage gravel. In the determined period for simulation,the permeability amount of drainage gravel will be measured and the reduction amount of thecoeffcient of the permeability by the effect of clogging will be studied permanently. Suitabledesign for gravel drainage height, needs suitable information of the amount of permeabilityreduction. Use the obtained results of the simulation, due to the prevent of creating drainagedamages