本文研究了表面缺陷程度不同的金刚石颗粒在磁场中的分离结果,为了保证磁性分选的高效率,预先对颗粒涂上细小分散的铁磁性微粒,其重量为金刚石重量的0.01～6%,并与缺陷程度成正比,这时金刚石的磁化率提高1～2个数量级,这就造成了在磁场中将金刚石分离成3～10种不同质量产品的可 In this paper, the separation of diamond particles with different degree of surface defects in magnetic field was studied. In order to ensure the high efficiency of magnetic separation, finely dispersed ferromagnetic particles were preliminarily coated on the particles, the weight of which was 0.01-6% of the weight of diamond In proportion to the degree of defects, the magnetic susceptibility of the diamond increases by 1 to 2 orders of magnitude, which results in the separation of the diamond into 3 to 10 different quality products in a magnetic field