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Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue. According to the method a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102 .
Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102 C. and 112 C. or lower .
tions with silver copper nickel palladium and platinum. In association with the platinum metals gold occurs as free gold as well as in solid solution. The native elements contain the most gold followed by the sulfide minerals. Several gold tellurides are known but no gold selenides have been reported and
Aug 15 2020 Element sulfur and copper sulfide a Gold foil 99.99 with hematite 0.165 molL NH 4 2 S 2 O 3 0.5 molL NH 3 and 50 mgL CuSO 4 Iron oxide some copper and sulphur species b Gold foil 99.99 with minerals 0.3 molL Na 2 S 2 O 3 0.5 molL NH 3 and 0.01 molL CuSO 4 Copper and sulfur species c Gold concentrate calcine 105 gt
gravity concentration techniques without any crushing or grinding. . a scrubber or trommel screen is typically used to separate the gold bearing sands from the clays ahead of the gravity units. The use of a trommel screen can result in fine . Both sulfide and oxide copper minerals can be consumers of cyanide. In the case of native copper or .
Mar 01 2002 The decrease in salinity following dilution favored the transport of gold silver and copper as hydrosulfide complexes and led to the deposition of the electrum-bearing Zn-Pb-Fe-Cu-Ag sulfide assemblage over a temperature range of 260 to less than 190 C at
making conventional cyanidation of coppergold ores or concentrates uneconomic Muir 2011. According to La Brooy 1992 the oxidised coppergold ores are selectively mined to minimise the presence of re-active copper to below 0.5 and otherwise sulphidic coppergold ores areoatedandgoldisrecoveredasaby-productofcoppersmeltingand
Quartz-Tourmaline Veins in the Northern Sierra Nevada Area Summer 1991. Tourmaline-bearing quartz veins and replacement deposits commonly copper- and gold-bearing are found in unusual concentration in northwestern Nevada and adjacent northeastern California in Triassic and Jurassic arc rocks and in the Cretaceous plutons that intrude them.
This article describes a method for the hydrochemical dissolution of a sulfide gold-bearing raw material from the Udereys deposit using nitric acid. The chemical and phase compositions of the studied material mainly represented by compounds of silicon sodium arsenic iron and sulfur are investigated. Phase composition pyrite arsenopyrite quartz thenardite.
The problem of refractory sulfide gold ore that has a gold recovery less than 50 when direct cyanidation applied still exists until now. It needs oxidative pretreatment for cyanidation to be effective in gold recovery the objective of this study is figuring out the effect of sodium nitrite as an oxidizing reagent on cyanidation of refractory gold ore.
For special native copper bearing ore bodies or sections of ore bodies rich in supergen native copper this mineral can be recovered by a simple gravity circuit. Application. Copper concentrate is the first commercial product of the copper production line and is composed of approximately equal parts of copper iron and sulfide.
A. Industry Concentration at the Mining Stage 1 . Copper Sulfide Ore to Finished Product ... I - 9 10 I-2 Technology of Primary Copper Production...I -11 TI-i Important Copper Producing Regions of . zone in the earths crust that contains copper-bearing minerals in unusual quantities. 8. Copper occurs in three different types of .
Oct 21 2019 The copper deposits in the world are widely distributed across five continents including more than 150 countries 1.According to the proportion of oxide minerals and sulfide minerals in copper
Within gold ores the element occurs in nature chiefly as native gold which is by far the most common gold bearing mineral. In various gold ores the native gold commonly occurs as tiny particles contained within sulfide minerals such as pyrite. Iron pyrite is an exceedingly common associate with gold but it also serves as a reducing agent.
Oct 26 2020 The main considerations are the fineness of the ore grinding the concentration of cyanide in the slurry and the leaching time. At the same time in order to reduce the amount of cyanidation operations the flotation concentrate re-cyanidation process can be used. 2.Sulfide gold-bearing
To ensure the required completeness and rate of leaching of copper and zinc from sulfide mineral raw materials we recommended to maintain the concentration of Fe 3 in the range of 0.5-30 gl preferably 5-15 gL. it is possible to provide an almost complete recovery of copper from bornite and chalcocite in a relatively short time process. When .
from pyritic massive sulfides. Likewise the concentration of native gold in gossan overlying the Flambeau Wisconsin . copper native gold. Massive sulfide. gossan goethite amorphous silica jarosite plumbojarosite . tation of a variety of Pb- and As-bearing metal sulfate and carbonate minerals fig. 121 table 121. Gold .
5 Copper sulfide ores Gold occurs as coarse liberated particles and fine particles locked in pyrite and copper sulfides. Grasberg and Batu Hijau all in Indonesia . zoned pyrite contains a high gold concentration and gold in the outer accretion zone is often higher than that in the core. Gold concentration in pyrite and
gravity concentration techniques without any crushing or grinding. . a scrubber or trommel screen is typically used to separate the gold bearing sands from the clays ahead of the gravity units. The use of a trommel screen can result in fine . Both sulfide and oxide copper minerals can be consumers of cyanide. In the case of native copper or .
the sulfide component has been shown to have a strong impact on the gold leaching kinetics 5. The leac3- h-ing behavior of gold in the presence of sulfide minerals depended strongly on both the solubility of the sulfides and the oxygen concentration in the solution 5. Based on the experiments observation it is postulated that sul-
Refractory Gold. The last type of gold deposit is called refractory gold and it is the most difficult type to extract. It can be defined as any ore that responds poorly to a conventional gravity-cyanidation process with examples including copper porphyry complex sulfides arsenopyrite and lead-zinc associations.
Using cyanide to recover gold from sulfide ores generally results in 30 to 35 recovery and the best I have heard of is around 50 recovery. The fine coating of a iron compound definitely appears to be a key component of the inability of cyanide to efficiently leach low grade pyritic ores.
Copper can be extracted from its ore by Underground sinking a vertical shaft into the Earth to an appropriate depth and driving horizontal tunnels into the ore. Open pit 90 of ore is mined by this method. Ores near the surface can be quarried after removal of the surface layers.
Aug 18 2005 It is known that gold can be efficiently leached from gold- bearing ores using a mixture of hydrochloric acid ferric chloride and manganese dioxide.12 The chemical reaction involved during the .
