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本文描述了主要工业锰矿物,即软锰矿、硬锰矿及菱锰矿,经二氧化硫活化后,用阴离子和阳离子捕收剂浮选时的特性曲线。获得的结果表明,用皂类捕收剂浮选软锰矿和硬锰矿时,二氧化硫能改善浮选效果,但对菱锰矿的可浮性没有什么影响。二氧化硫对一些锰矿物的活化效果不同是由于这些锰矿物中锰化合价的改变。用皂类捕收剂浮选锰矿物时,二氧化硫的有效作用可归因于其能将矿物表面酸性的四价锰原子降低为基性的二价锰。因此,对一定的锰矿物而言,其锰的化合价愈高,则愈易被二氧化硫活化,愈易用阴离子捕收剂(如油酸钠)浮游。
This paper describes the characterization of major industrial manganese minerals, ie, pyrolusite, hard manganese ore and rhodochrosite, after flotation with anionic and cationic collectors after activation with sulfur dioxide. The results obtained show that sulfur dioxide can improve the flotation effect when flotation of pyrolusite and pycnomorph with soap collector, but has no effect on the floatability of rhodochrosite. The effect of sulfur dioxide on the activation of some manganese minerals is due to the change of manganese valences in these manganese minerals. In the flotation of manganese minerals with soap collectors, the effective action of sulfur dioxide can be attributed to its ability to reduce the acidic tetravalent manganese atoms on the mineral surface to base manganese. Therefore, for some manganese minerals, the higher the valence of manganese, the more easily activated by sulfur dioxide, the more easily with anionic collectors (such as sodium oleate) floating.