摘要

The adsorptive characteristics of Mycobacterium phlei on the surfaces of pyrite and galena were reported in this paper. The influence of environmental conditions, such as adsorptive time, pH, temperature, concentration of microbial cells and minerals, on the adsorptive effect was discussed in order to look into the probability of using the microorganism as depressant in the flotation of sulfide minerals. The experimental results showed that the adsorptive performances of Mycobacterium phlei on the surfaces of these minerals are distinctively different. Mycobacterium phlei showed a tendency to adsorb onto the surface of pyrite and the lower adsorption rate of the microorganism on the surface of galena is measured. SEM results indicated that the capsule on the surface of Mycobacterium phlei cells was the significant attachable section. According to the experiments, it can be concluded that pyrite will be depressed and galena will be floated preferentially in flotation process when the suitable amount of Mycobacterium phlei cells exists in flotation pulp.

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