论文部分内容阅读
在浮选矿浆中,磁性矿物与蛇纹石同时进行分选,虽然不用磁化就可选择性地富集铬铁矿,但并不能得到高铬铁比的精矿,这是因为使用油酸作捕收剂时,磁铁矿就有可浮性的缘故。然而在很低的磁场强度下(不超过100高斯),可以获得含Cr_20_3为57％、Cr/Fe为3 2:1、回收率达55％的精矿。若在较高的磁场强度下,铬铁矿便被留存在矿浆中,这表明对分选铬铁矿的上述目的而言,使用弱磁场的永久磁铁为适宜。应用氟硅酸钠能够成功地抑制蛇纹石,因氟硅酸钠能消除溶解的各种金属离子的影响。在pH值为5.5的酸性矿浆中,硅酸盐的可浮性就减少了,但铬铁矿却容易浮起。富集铬铁矿的这种方法的适用性,尚需进一步经过半工业试验验证。
In flotation pulp, magnetic minerals and serpentine are sorted at the same time. Although chromite can be selectively enriched without magnetization, it is not possible to obtain a concentrate having a high ratio of ferrochrome due to the use of oleic acid Collector, the magnetite can be floatable reason. However, at very low magnetic field strength (up to 100 Gauss), a concentrate containing 57% Cr203, 32/2 Cr / Fe and 55% recovery can be obtained. The presence of chromite in the slurry at higher magnetic field intensities suggests that a permanent magnet using a weak magnetic field is appropriate for the above purposes of sorting chromite. Application of sodium fluosilicate can successfully inhibit the serpentine, because of sodium fluoride can eliminate the dissolution of a variety of metal ions. In acidic slurries with a pH of 5.5, the flotability of silicates is reduced, but chromite is more likely to float. The suitability of this method for enriching chromite still needs to be further verified by semi-industrial tests.