Direct Hydro-oxidation of Pyrrhotite with full sulphide oxidation

黄金矿业公司是加拿大最大的资源开采公司之一，对加拿大经济做出了重大贡献。加拿大黄金矿业公司在全球黄金矿业公司中占很大比例，目前世界前5大黄金生产公司中有3家是加拿大公司。**加拿大有大量含砷杂质的黄金储备，主要在安大略省和魁北克省。然而，黄金提取的成本很高，主要是由于砷固定步骤，使得大多数矿床在经济上不可行。总部位于魁北克的邓迪可持续技术公司开发了一种从含砷金矿中回收砷的工艺，并将其固定为高度稳定的玻璃相。砷萃取固定化工艺的产物是包裹细小金颗粒的磁黄铁矿产物。**为了使金适合金浸出和提取，重要的是在金提取过程之前氧化硫化物（即磁黄铁矿）**。这个拟议项目的目标是开发一种大气氧化工艺来氧化硫化物**（磁黄铁矿）并释放金。如果成功，该工艺可与DST砷固定**工艺相结合，这两种工艺将是一种成本极低且可持续的砷固定和金金属回收的包容性工艺。这一过程预计将具有很高的价值，因为它将**适用于加拿大的含砷金矿床，目前大多数是不具经济价值的矿床。

Gold mining companies are among the largest resource extraction companies in Canada, with significant**contribution to the Canadian economy. Canadian gold mining companies make up a large proportion of the**global gold mining companies, and currently 3 largest gold producing companies out of the world's top 5 are**Canadian.**Canada has significant gold reserves which contain arsenic as an impurity, mostly in Ontario and Quebec.**However the cost for the gold extraction is high, mostly due to the arsenic immobilization step, making most of**the deposits economically unviable.**Dundee Sustainable Technology, a Quebec based company, has developed a process to recover the arsenic**from the arsenic containing gold ores and immobilize it as a highly stable glass phase. The product of the**arsenic extraction and immobilization process is a pyrrhotite product which encapsulates the fine gold particles.**To make the gold amenable to gold leaching and extraction, it is important to oxidize sulphides (i.e. pyrrhotite)**before gold extraction process.**The objective of this proposed project is to develop an atmospheric oxidation process to oxidize the sulphides**(pyrrhotite) and liberate gold. If successful, the process can be combined with the DST arsenic immobilization**process, and the two processes together would be an extremely low cost and sustainable inclusive process for**arsenic immobilization and gold metal recovery. This process is expected to be highly valuable as it would be**applicable to the Canadian arsenical gold deposits, mostly being uneconomic deposits at the moment.