Application of dry grinding production practice of Carlin type gold ore roasting process

卡林型金矿由美国内华达州“卡林金矿”而得名，它属于一种微细浸染型金矿。该种类型的矿石，由于金颗粒呈显微和亚显微级浸染在硅化的碳酸盐类岩石中，浸出剂难以渗入其内部达到被包裹的金，使其直接浸出，通常都需对矿石进行氧化预处理，以分解包裹金的矿物从而解离出金，这样，在后续的氰化过程中就可将它浸出了。

The Carlin type gold deposits by the United States Nevada "Carlin gold deposit" and its name, it belongs to a kind of micro disseminated gold deposit. The types of ore, due to the gold particles were microscopic and submicroscopic level disseminated in silicated carbonate rocks, the leaching agent is difficult to penetrate the interior to be encapsulated gold, the direct leaching, are usually required for ore oxidation pretreatment, to decompose the inclusion gold minerals from the dissociation of the gold, so that in the subsequent cyanidation process can be leaching.

氧化预处理方法主要有两类：火法和湿法。火法即焙烧，这是古老而叉可靠的预处理方法，该法工艺成熟，技术可靠，操作简单，适应性强，投资费用和成本相对较低，但在焙烧过程中会产生大量的S02、As：03等有毒气体，会严重污染环境。湿法包括加压氧化、化学氧化和生物氧化。

There are mainly two kinds of oxidation pretreatment methods: fire method and wet method. Fire roasting, which is ancient and fork reliable pre processing method, the technology is mature, reliable technology, simple operation, strong adaptability, investment costs and the cost is relatively low, but in the roasting process will produce a lot of S02, As:03 and other toxic gases, serious pollution of the environment. Wet process includes pressurized oxidation, chemical oxidation and biological oxidation.