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submicroscopic gold inclusions within sulphide minerals such as arsenopyrite and pyrite. Such ores require a pretreatment process to alter or destroy the sulphide matrix and render the gold accessible to cyanide and oxygen (Gudyanga et al., 1999). The gold in highsulphur and higharsenic refractory gold concentrate (HGC) is encapsulated
Armor Technique Institute of PLA,Changchun,Jilin 130117,China) Microwave roasting method was applied for the pretreatment of refractory gold ore (RGO). The occurrence,phase of gold and microstructure of roasted product were analyzed. The results showed that gold existed in tiny granular gold and submicro grain gold,the occurrence form of gold was mainly in goldbearing sulfides and gold
Bacterial oxidation process to leach gold is roughly divided into three stages: (1) using bacteria culture medium to cultivate thiobacillus ferroxidans, etc. and preparation for sulfuric acid bacteria leaching solution of Ph=; (2) bacteria catalyzing, oxidizing and removing arsenic and sulfur; (3) the residue from pretreatment cyaniding (or other methods) to leach gold, solution of pretreatment can be recycled
Nanthakumar et al. (2007) investigated the use of microwave energy in pretreating a double refractory gold ore containing % sulphur and % total carbon. Wei et al (2009) applied microwave
18/07/2013#0183;#32;In this research, microwave pretreatment was used to augment the grinding of a freemilling gold ore containing quartz, silicates and iron oxides. Under microwave irradiation, selective heating of the different mineral components resulted in thermal stresses that caused cracking.
Metallurgical ContentGold Leaching amp; Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and
Double refractory gold ores, such as Barricks Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching. One possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon. In this research, microwave roasting of a double refractory gold ore was investigated
Review Pretreatment Process on Refractory Gold . Microwave roast ing is a new pretreatment to solve the problem. It uses min pose of arsenical pyrite and gold concentrate with pyrite the gold leaching rate reached 98 .10) effective method for the carbon refractory gold ore and is used in preprocess of high arsenic gold ore. Chat Online; 1 Microwave Heating Characteristics and Microwave
10/12/2011#0183;#32;Microwave assisted pretreatment of refractory gold concentrate Gold is considered to be refractory when it cannot be easily recovered by alkaline cyanide leaching. The vast majority of refractory gold occurs in sulphidic minerals such as pyrite (FeS 2 ), arsenopyrite (FeAsS) and pyrrhotite (FeS).
The results demonstrated that a maximum gold recovery of 97% was achieved, and that gold recoveries of the refractory gold concentrate quickly increased to the maximum with microwave heating time.
Download Citation | Study on microwave pretreatment of refractory microdimensional gold packaged by pyrite in gold ores | By using the heating feature of microwave, it has shown from condition
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