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在处理岩石和矿石试样过程中,粒度不同的金,其颗粒的性质在本质上是不同的.B.N.捷列诺夫曾这样划分:微细粒金—粒度小于1微米、细粒金—1～70微米、粗粒金—大于70微米、极粗粒金——大于0.5～0.6毫米.1.试样粉碎后,粗粒金从矿石中解离出来,易于用重选法捕集.2.细粒金,一部分呈单体状态,另一部分仍与其它矿物连生呈复合颗粒.由此对细粒金用重选手段难以捕集,但用氰化手段可使溶解.3.微细粒金的大部分仍被包裹在其它矿物颗粒中.包在硫化矿物中的经氰化焙烧后可用氰化手段回收,而在石英中的则需用熔炼法回收.
In the treatment of rock and ore samples, different particle sizes of gold, the nature of the particles are essentially different. BN Te Linov has been divided into: fine gold - particle size of less than 1 micron, fine gold -1 ~ 70 microns, coarse gold - more than 70 microns, very coarse grain gold - more than 0.5 to 0.6 mm .1. After the sample is crushed, the coarse grain gold dissociates from the ore and is easy to catch by reelection method. Fine gold, some were monomer, the other part is still associated with other minerals were composite particles.Therefore, it is difficult to capture fine grained gold with re-election means, but with cyanidation means can dissolve .3. Of the majority of the particles are still surrounded by other mineral particles in the sulfide minerals in the cyanide roasting can be recovered by means of cyanidation, while in quartz you need to use smelting recovery method.