本文選題：滲流 + 偏析�。� 參考：《中國(guó)有色金屬學(xué)報(bào)》2017年03期

【摘要】：柱浸過程中礦巖散體的不均勻分布影響著溶液的滲流規(guī)律。為考察細(xì)粒層的存在下溶液流動(dòng)特性,利用CT技術(shù)與COMSOL Multiphysics多相耦合模擬軟件,開展礦巖散體內(nèi)溶液滲流模擬研究,獲得細(xì)粒層存在條件下的流體流動(dòng)軌跡、滲流速度場(chǎng)及壓力場(chǎng)分布規(guī)律。結(jié)果表明:細(xì)粒層影響著溶液的流動(dòng)軌跡和優(yōu)先流的形成,具體表現(xiàn)為大部分溶液繞過細(xì)粒層形成優(yōu)先流,細(xì)小支流橫穿細(xì)粒層,在細(xì)粒層內(nèi)部溶液難以到達(dá)的位置,溶液流速較低,形成溶液流動(dòng)的停滯區(qū)。細(xì)粒層內(nèi)溶液速度降與壓力降較小,在相鄰細(xì)粒層的孔喉位置處,溶液流速及該處壓力明顯增高。
[Abstract]:The uneven distribution of ore and rock particles during column leaching affects the percolation law of solution. In order to investigate the fluid flow characteristics in the presence of fine-grained layer, the fluid flow trajectory under the condition of the existence of fine-grained layer was obtained by using CT technique and COMSOL Multiphysics multi-phase simulation software. The distribution of seepage velocity field and pressure field. The results show that the fine grained layer affects the flow path and the formation of the preferential flow of the solution. It is shown that most of the solution bypasses the fine layer to form the preferential flow, the small tributary flows cross the fine grain layer, and it is difficult to reach the position of the solution inside the fine grain layer. The flow rate of the solution is low, forming the stagnant zone of the solution flow. The solution velocity and pressure drop are smaller in the fine layer, and the velocity and pressure of the solution increase obviously at the pore throat position of the adjacent fine layer.
【作者單位】： 北京科技大學(xué)土木與資源工程學(xué)院金屬礦山高效開采與安全教育部重點(diǎn)實(shí)驗(yàn)室;北京金誠(chéng)信礦山技術(shù)研究院有限公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51374035) 新世紀(jì)優(yōu)秀人才支持計(jì)劃資助(NCET-13-0669) 全國(guó)優(yōu)秀博士學(xué)位論文作者專項(xiàng)基金資助項(xiàng)目(201351)~~
【分類號(hào)】：TD912

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