草分枝杆菌在赤铁矿表面的吸附能力

Adsorption Ability of Mycobacterium Phlei on Surface of Hematite

微生物在矿物表面的吸附能力是决定微生物能否用作选矿药剂的基础。通过单矿物试验和显微镜观察研究了草分枝杆菌对-30μm微细粒赤铁矿的浮选行为，结果表明：赤铁矿在草分枝杆菌浮选体系中均以絮团形式存在，草分枝杆菌用量和浮选pH值影响絮团的大小和紧密程度，进而影响赤铁矿的上浮率；pH值应控制在5～7、草分枝杆菌用量应控制在16mg／L左右。利用热重分析法分析了草分枝杆菌在赤铁矿表面的吸附情况，得出单位质量-30μm赤铁矿对草分枝杆菌的吸附量为0．0212g／g，草分枝杆菌在赤铁矿表面的包覆率为17．6％。

The adsorption ability of microorganisms on mineral surface is the base for deciding whether they can be used as mineral processing reagents. The effect ofMycobacterium Phlei on the flotation behavior on micro-fine hematite was investigated by single-mineral test and microscopic observation. The results showed that hematite occurred in a form of flocculates in Mycobacterium Phlei flotation system and the dosage of Mycobacterium Phlei and the flotation pH value influenced the size and compaction of flocculates and further the hematite floating rate. The pH value should be controlled at 5 -7 and the dosage of Mycobacterium Phlei at aboutl6 mg/L. The adsorption of Mycobacterium Phlei on the surface of hematite was analyze by thermal gravity method and it was concluded that that the adsorption amount of Mycobacterium Phlei on unit mass of -30μm hematite was about 0. 021 2 g/g and the hematite surface wrapped by Mycobacterium Phlei was 17.6% .