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在贵金属选别中，活性炭被广泛应用于从氰化液中回收金和银，尤其是从矿浆和没有澄清液中．但是，炭容易被矿浆里惰性颗粒污染，从而降低炭的活性或载金量．本文试图给活性炭中细的惰性颗粒的分布以量化，此外本文还假设了细粒侵入的可能机理．用沉淀硅石和硅砂粉来模拟矿浆条件，通灰化的办法来测定活性炭中它们的载荷．细粒侵入到炭微孔中的动力学速度是相当快的，它取决于矿浆中的浓度．结果表明，固体颗粒大小和细粒的电位影响着惰性类颗粒在炭中的载量，通过扫描电镜和次生离子质谱仪测定表明，炭颗粒中心处的固体浓度是减小的．
Activated carbon is widely used to recover gold and silver from cyanide liquor, especially from pulp and no clear liquor, in precious metal sequestration. However, carbon is easily contaminated with inert particles in the slurry, thereby reducing the activity or loading of carbon. This paper attempts to quantify the distribution of fine inert particles in activated carbon. In addition, we also hypothesize the possible mechanisms for the intrusion of fine particles. Sedimentary silica and silica sand powder were used to simulate the slurry conditions, ashing to determine their load in activated carbon. The kinetic velocity of fines ingress into the pores of the carbon is quite rapid and depends on the concentration in the slurry. The results show that the solid particle size and the potential of the fine particles influence the loading of inert particles in the carbon. The determination by scanning electron microscopy and secondary ion mass spectrometry shows that the solid concentration at the center of the carbon particles decreases.