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在矿物加工领域中 ,金属硫化物精矿的生物浸出通常都在很大的机械搅拌槽中进行。这类生物反应器在进行混合、充气及热传递时需要消耗相当大的动力。矿浆泡沫柱可用作一种替代设施使生物浸出在比较经济的条件下进行。因为在矿浆泡沫柱中 ,矿粒受气体的运动及液体向上流动而被悬浮。为了比较这两种技术 ,在实验室规模对黄铁矿精矿进行生物浸出时 ,对一组串联的搅拌反应器和一台泡沫柱进行了比较作业。对这两套设备不仅在分批条件而且还在连续条件下进行了试验。泡沫柱的行为不仅明显受到难以保持连续给矿的影响 ,而且还受重固体矿粒的明显沉降影响。然而 ,从分批试验结果推导出的理论动力学数据 ,可以对在泡沫柱和机械搅拌反应器中进行连续试验所得到的数据进行比较。这些动力学数据已被用于评价反应器的设计和配置选择对生物浸出行为的影响中。
In the field of mineral processing, bioleaching of metal sulphide concentrates is usually carried out in very large mechanical agitation tanks. Such bioreactors consume considerable power when mixing, aerating, and transferring heat. Colloidal foam columns can be used as an alternative to leaching biological organisms under more economical conditions. Because in the slurry column, the mineral particles are suspended by the movement of the gas and the upward flow of the liquid. To compare the two technologies, a series of stirred reactors and a foam column were compared for bioleaching pyrite concentrate on a laboratory scale. The two sets of equipment were tested not only under batch conditions but also under continuous conditions. The behavior of the foam column is not only significantly affected by the difficulty of sustaining the continuous mineralization but also by the significant sedimentation of heavy solid minerals. However, the theoretical kinetic data derived from the batch test results can be compared to data obtained from continuous experiments in a foam column and a mechanical stirred reactor. These kinetic data have been used to evaluate the impact of reactor design and configuration options on bioleaching behavior.