Floating washing gold

浮选是黄金选矿厂处理脉金矿石应用最广的方法之一。在大多数情况下，浮选法用于处理可浮性很高的硫化矿物含金矿石，效果最显著。因为通过浮选不仅可以把金最大限度地富集到硫化矿物精矿中，而且可废弃尾矿，选矿成本低。浮选法还用来处理多金属含金矿石，例如金－铜、金－铅、金－锑、金－铜－铅－锌－硫等矿石。对于这类矿石，采用浮选法处理能够有效地分别选出各种含金硫化物精矿，有利于实现对矿物资源的综合回收。此外，对于不能直接用混汞法或氰化法处理的所谓"难溶矿石"，也需要采用包括浮选在内的联合流程进行处理。当然浮选法也存在局限性；对粗粒嵌布、金粒度大于0.2mm的矿石，对不含硫化物的石英质含金矿石，调浆后很难获得稳定的浮选泡沫，采用浮选法就有困难。

Flotation is one of the gold ore processing plant is the most widely used method of vein type gold ore. In most cases, the flotation method for processing the floatability of high sulfide gold ore, the most significant effect. Because by flotation can not only put the gold to maximize the concentration of sulfide mineral concentrate, but also waste tailings, ore dressing cost. The flotation method is also used to treat polymetallic gold ores, such as gold - copper, gold, lead, gold - antimony gold - copper lead zinc sulfide ore. To this kind of ores, the flotation process can be effectively selected various gold bearing sulfide concentrate, conducive to the realization of comprehensive recovery of mineral resources. In addition, for you cannot directly use the amalgamation or cyanidation process of so-called "refractory ore", also need to adopt the combined process of flotation, including processing. Of course, the flotation method has limitations; the coarse grain disseminated gold ore, particle size greater than 0.2mm, the quartz gold ore containing no sulfide flotation foam stability, obtained very difficult after pulp, it is difficult to adopt flotation.

近年来，金矿石的浮选工艺有很大进展，主要表现在工艺流程的革新、研制新药剂、改进设计等方面。采用阶段磨矿、阶段选别流程是目前浮选选金的发展趋势，国外多数选金厂采用二段甚至三段，金的回收率提高2%～6%。

In recent years, the flotation process of gold ores have great progress, mainly in the process of innovation, development of new agents, improved design etc.. The stage grinding stage separation process, don't is the current trend of flotation of gold, the majority of foreign gold using two or three segments, the gold recovery rate is increased by 2% ~ 6%.

由于浮选法只能将金最大限度地富集到各种硫化矿物精矿中，不能最终获得成品金，因此，采用单一浮选流程的选金厂为数不多，一般是将浮选作为联合流程的一个过程采用。目前我国采用单一浮选流程的选金厂有遂昌、岫岩等金矿，以及一些地方群采小金矿。

The flotation will only gold maximum enrichment to various sulfide concentrate, cannot obtain refined gold, therefore, a single flotation of gold is number not much, usually as a combined process of flotation process using. At present, the single flotation of gold in Suichang gold mine, Xiuyan, and some local small gold mining.