The process of extracting gold from ores by absorption of the precious metal in chlorine gas, from which it is reduced to a metallic state, is not a very new discovery. It was first introduced by Karl Friedrich Plattner around 1848, and at that time promised to revolutionize the processes for gold extraction.
Complete extraction of the gold by amalgamation is impossible, a part remaining in the mud of the stamp- mills. Concentration is effected by washing, and the " concentrates " are chlorinated by the Plattner process.
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Using Electricity as a Method of Gold Extraction. One hundred grams of 100 mesh ore were placed in a jar with 500 grams of water and 15 grams of sodium chloride. This was electrolyzed with a current of 0.3 – 0.6 ampere for three hours, current density 0.1 – 0.2. The electrodes were of platinum and the solution was slowly agitated.
Gold extraction by chlorination using a pyrometallurgical process Introduction. Over the last years, gold recovery has been the central issue in a wide range of studies as a consequence of its high demand and value.
Gold in the CT system of chlorination reaction apparent activation energy was 40.05 kJ/mol, and the impact of interfacial chemical reaction on the chlorination of gold has a decisive influence on the reaction rate. The activation energy of silver is about 8.97 kJ/mol, indicating that silver removal is carried out by diffusion control.
Extraction Of Gold By Chlorination - gaytripackagingcoin ,Chlorination-extraction method of gold,,,, Research on bromide leaching of gold and its future; 3 extraction of germanium by traditional chlorination process 1 ngdn .
In this paper, the extraction of gold from the refractory gold ore is carried out by synergistic action between ultrasound and chlorination-oxidation. The optimum conditions were NaClO concentration of 1.5 mol/L, NaOH concentration of 1.5 mol/L, solid-liquid ratio of 5, ultrasound power of 200 W and sonication time of 2 h.
substitute for chlorine. For extraction of gold from the refractory ores in which gold is surrounded by sul-fide minerals, oxidative pretreatment of the ore is essential to oxidize the sulfides and expose gold. Pyrometallurgical oxidation by roasting is encountered with environmen-tal limitations; thus hydrometallurgical methods are preferred.