WebThe initial temperature of gold chlorination is 700 ° C (Figure 3), and the amount of volatiles per unit is about 0.3 mg / cm 2/ hour. If the calcination temperature is increased to 800 ° C, the chlorination rate can be increased to 4 to 6 mg / cm 2• hour. Increasing the consumption of chlorinating agents will have a similar effect. WebMar 1, 2009 · The direct chlorination of a pure gold was also studied up to a temperature of 1223 K. These experiments demonstrated that the precious metal is not attacked at that temperature, in agreement with the literature, which indicates that the reaction of direct chlorination of gold is produced at high temperatures ( Panias and Neou-Syngouna, …
Chlorination Leaching of Refractory Ores - Hydrometallurgy: …
http://www.springmachinery.net/article-chlorination-roasting-of-gold-containing-1261.html Web(c) chlorinating the ore by contacting the ore with chlorine at a temperature of 300° to 400° C., in the presence of at least one mole or iron per mole of gold present in the ore to convert... gym company toti
What are the Cyanide-Free Gold Recovery Methods?
For any system of chlorination yet introduced it is necessary to free the ore from sulphides. This is done by roasting according to any of the well-known systems in vogue. It is a matter which requires great care and considerable skill. The heat must be applied and increased slowly and steadily. If, through any neglect on the part of the roaster, the ore is allowed to fuse, the charge is typically thrown away as waste. This roasting applies equally to the Vautin process as to any ot… WebJan 1, 1990 · Dunn (1982) and Dunn et al. (1991) have extracted gold by chlorination using pyrometallurgical processes at temperatures lower than the ones mentioned above, from refractory minerals and alloys ... WebLeaching of gold in chlorine media was industrially practiced before cyanide was used for this purpose. As such the chemistry is actually well documented: Gold leaching Oxidation reaction: Au + 4Cl- = Au(Cl)4- + 3e. Reduction reaction: 1.5Cl2 + 3e = 3Cl-Other metals All metals will leach in this environment. gym company winchester hills operating hours