Copper-bearing Refractory Gold Ore Ammonia Cyanide Method Extraction And Assay Mechanism

Gold is a kind of valuable rare metal, besides be international general currency, jewelry and ornament, in modern industrial technology, there is also extensive use. It has important position in the development of national economy, plays an important role in human political, economic, cultural life.The cyanidation started to be applied to leach gold in the end of 18th century, which is effective, and can realize produce right on the spot, belongs to hydrometallurgy craft. It is a kind of modernization of leaching gold technique, broadly applied in the gold, silver mine all over the world. Currently, most of gold in the whole world was recovered from the gold ores by using an alkaline cyaniding method. The reason that the alkaline cyaniding process is been widespread, mainly is its craft process simple, under most conditions the technical and economic index are satisfactory. But as the increase of the mine depth, the miscellaneous quality content in the ores increases, in the cyaniding process, these materials will consume oxygen and cyanide, causing to recovery descending. In order to keep a recovery rate, the cyanide increases continuously, making the cyaniding process become uneconomical, and bring huge influence to the environment. Therefore it have important realistic meaning to study a leaching gold craft that is effective and lower the dosage of cyanide further, and adopt a more valid method processing to recovery containing a miscellaneous quality more gold ores with the sulphur, copper, arsenic..etc..In recent years, for the weakness of the cyanidation, the research(increase an assistance reagent) enhances to leach using the chemistry reagent, exaltation leaching result, reducing cyanide dosage, promoting to adsorb, this has already become an important research direction. It is also an important way that the chemistry carries out a cyanide processing craft to optimize. Chemistry medicine's helping to leach has already displayed good result and applied foreground, display huge superiority. The thorough research would bring new breakthrough probably, make use of the gold resources effectively and keep on the development of the gold resources, which have important actual value and economic meaning.This thesis includes two parts of researches:The first parts, some gold mine in Shandong floatation gold concentrate was researched, we carried on laboratory experiment, found out an assistance reagent and investigated the influences of various factors on the gold, silver leaching. We gained our ends of lowering cyanide quantity, improving the technical index and economic benefits.The second part, Aiming at the experiment ores, we discussed the influence of a set of the companion livings to gold leaching in ammoniacal cyanide process and leaching and adsorption mechanism etc. to ammoniacal cyanide process.