extraction of gold from the sulphide ore

extraction of gold from the sulphide ore

Gold Pyrite ores   Danafloat   Home

Gold Pyrite ores Danafloat Home

Where the gold is intimately associated with various sulphide minerals, especially iron sulphides which include pyrite, arsenopyrite and pyrrhotite, flotation recovery of the gold is dependent on recovery of the associated minerals. In this case gold follows the associated sulphide mineral recovery.

Roasting (metallurgy)

Roasting (metallurgy)

Roasting is a process of heating of sulfide ore to a high temperature in presence of air. It is a step of the processing of certain ores . More specifically, roasting is a metallurgical process involving gassolid reactions at elevated temperatures with the goal of purifying the metal component(s).

Copper Mining and Extraction Sulfide Ores

Copper Mining and Extraction Sulfide Ores

Copper Mining and Extraction Sulfide Ores. Copper has a remarkable combination of properties. It is a good electrical and thermal conductor. It is ductile and it can prevent bacterial growth (see Copper Properties and Applications ). As with all world resources, the supply of copper from the ground is limited.

Gold Extraction and Recovery Processes   Semantic Scholar

Gold Extraction and Recovery Processes Semantic Scholar

available for the extraction of gold metal from its ores. Amongst these methods, cyanidation is the most common method used in the leaching of gold from the ore. This process involves the dissolution of gold containing ores in dilute cyanide solution in the presence of lime and oxygen. For refractory ores such as

Sulfide Ore Processing  TCB Metals and Refining

Sulfide Ore Processing TCB Metals and Refining

Sulfide Ore Processing; Placer Gold; Sulfide Ore Processing. Home Sulfide Ore Processing . Processing Sulfide Ores. Historically, miners have shipped their sulfide concentrates to overseas smelters that have little to no regulations or emissions controls. However, with the implementation of the Mercury Export Ban of 2008 and the high costs

Chemistry Tutorial  Copper Smelting   AUS e TUTE

Chemistry Tutorial Copper Smelting AUS e TUTE

Copper can be extracted from sulfide ores (usually higher grade ores) by direct smelting. The earliest evidence of copper smelting occurs in Serbian artefacts dating from around 5000 BC. Copper can be extracted from oxide ores using electrolysis ( electrowinning ) for low grade ores, or by the carbon reduction method of smelting for higher grade ores.

Gold Extraction   an overview  ScienceDirect Topics

Gold Extraction an overview ScienceDirect Topics

Low Sulfide Ore. Plant data indicated that the addition of lead nitrate increased gold extraction from 87% to 91.7% and, for the 18 months evaluated, resulted in gold production in excess of 49,000 oz higher than that estimated for the nonlead nitrate reagent scheme.

Copper Ore Types Sulfides vs. Oxides  Investing News Network

Copper Ore Types Sulfides vs. Oxides Investing News Network

Copper Ore Types Sulfides vs. Oxides. copper oxide ores and copper sulfide ores. Both ore types can be economically mined, though they are processed in different ways. The deposit also

Metals extraction strikes gold  IOM3

Metals extraction strikes gold IOM3

Oct 01, 2008Speed of extraction is another area that Conti says cannot be beaten. We have been testing sulphide ores and are able to do the entire process, from sulphur reduction, extraction and recovery to powdered gold, in an hour and a half. That same material would take 36 hours with cyanide, which only gets an 83% extraction efficiency.

Processing gold sulphide ore   Gold Refining Forum

Processing gold sulphide ore Gold Refining Forum

Apr 14, 2014If your processing a high sulphide content gold ore this will not work. With high sulphide gold ore break it down and seperate it till all you see is the yellow shiny stuff then take that and put it into a hydrocloric acid solution and let it sit for a week or so swirling it in bottom of container occasionally.

Sulfide Ore Processing  TCB Metals and Refining

Sulfide Ore Processing TCB Metals and Refining

Instead of relying on autoclaves or roasting to prepare a sulfide ore for traditional leaching, our vibratory grinder on our circuit allows our leach to make contact with the precious metal encapsulated in the sulfide so leaching can occur.

Extraction of silver from Argentite   Reference Notes

Extraction of silver from Argentite Reference Notes

Extraction of silver from Argentite. b. Treatment with sodium cyanide The concentrated are is treated with 0.4% to 0.7% aqueous solution of sodium cyanide and the current of air pass through it. The argentite ore dissolves in sodium cyanide forming sodium argento cyanide.

Process to Recover Gold from Sulfide Ores   GOLD

Process to Recover Gold from Sulfide Ores GOLD

May 27, 2016I believe it has an application to recover gold from sulphide ores by eliminating the current roasting requirements to oxidize the ore. Assuming we can apply the same amount of energy used in past testing, it equates to 4 cents per ton.

Leaching of a Gold Bearing Partially Roasted Sulphide

Leaching of a Gold Bearing Partially Roasted Sulphide

M.F. Almeida*. This research aimed at defining a route for recovering precious metals from a very heterogeneous gold bearing sulphide and arsenide concentrate that was partially roasted and dumped by the 1960s when Santo Antnio mine closed. Gold occurs in this concentrate as free particles in the range of 10 100 m m,

A Novel Technique for Silver Extraction from Silver

A Novel Technique for Silver Extraction from Silver

A Novel Technique for Silver Extraction,S. In this study, a novel method for silver extraction from silver sulphide ore is described. 2S, with thiosulphate as the complexing reagent. 3 were used. The leaching process was carried out in a 1L beaker placed on a hot plate with a magnetic stirrer.

Sulfide Ores   an overview  ScienceDirect Topics

Sulfide Ores an overview ScienceDirect Topics

1.1.2 Extraction of Nickel and Cobalt from Sulphide Ores Sulphide ores were mostly created by (i) the intrusion of molten magma from the mantle into the crust of the earth and (ii) the formation of localized metal rich sulphide ore bodies by sequential solidification and/or

pyro metallurgical extraction of copper from sulfide ores

pyro metallurgical extraction of copper from sulfide ores

The extraction of metals does not have any universal method as it depends . 3 Typically, sulphide ores of copper, zinc and lead are roasted Expensive If pyro metallurgical and hydrometallurgical operation fail than use it.

Sulphide Gold  Gekko

Sulphide Gold Gekko

Sulphide complex gold can occur in a wide range of particle sizes. Because cyanide cannot always leach sulphide associated gold, regrinding the ore is typically required to expose the free gold for recovery by intensive leaching .

Recovery of Gold in Pyritic Sulfide Ores   Mine Engineer.Com

Recovery of Gold in Pyritic Sulfide Ores Mine Engineer.Com

Recovery of gold in sulfide ores has fallen into several categories. First is froth flotation, and second is cyanidation of the ores. 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

Mining and Extraction Oxide Ores   processes for

Mining and Extraction Oxide Ores processes for

Copper Mining and Extraction Oxide Ores. Most of the copper ores mined today are oxide or sulfide ores. Extraction of sulfide ores is covered in more detail in Copper Mining and Extraction Sulfide Ores (1114), but is introduced here because an important by product of

pyro metallurgical extraction of copper from sulfide ores

pyro metallurgical extraction of copper from sulfide ores

The extraction of metals does not have any universal method as it depends . 3 Typically, sulphide ores of copper, zinc and lead are roasted Expensive If pyro metallurgical and hydrometallurgical operation fail than use it.

Cyanide Leaching Of Gold   Mine Engineer.Com

Cyanide Leaching Of Gold Mine Engineer.Com

Cyanide Leaching Of Gold Gold Cyanide Solution (Leaching Gold With Cyanide) Since the 1890's, cyanide has been used to recover gold from gold bearing ores. And today, over 115 years later, most of the worlds gold is recovered with cyanide playing a large part in

Gold Extraction   an overview  ScienceDirect Topics

Gold Extraction an overview ScienceDirect Topics

Low Sulfide Ore. Plant data indicated that the addition of lead nitrate increased gold extraction from 87% to 91.7% and, for the 18 months evaluated, resulted in gold production in excess of 49,000 oz higher than that estimated for the nonlead nitrate reagent scheme.

Sulphide Gold Ore Treatment by Leaching and Flotation Process

Sulphide Gold Ore Treatment by Leaching and Flotation Process

A Flowsheet to recovery gold from sulfide ores. Coarse primary grind on bulk of ore means a saving by using smaller grinding and classifying equipment, etc., Lower operating grinding costs for balls, liners and power. Very fine grind on small amount of concentrates is possible if required. Small tanks, etc.,

(PDF) Preg Robbing Potential of Sulphide Bearing Gold Ores

(PDF) Preg Robbing Potential of Sulphide Bearing Gold Ores

PDF In this study, the preg robbing characteristics of a copper rich gold ore and a pyritic gold ore were evaluated based on the adsorption of gold by ore from the spiked solutions (0 5 mg/L Au).

Roasting (metallurgy)

Roasting (metallurgy)

Sulfating roastingEdit. Sulfating roasting oxidizes certain sulfide ores to sulfates in a controlled supply of air to enable leaching of the sulfate for further processing. The sulfide ores of copper are heated in the reverberatory furnace. If ore contain iron, it is mixed with silica before heating.

Cyanide Leaching Of Gold   Mine Engineer.Com

Cyanide Leaching Of Gold Mine Engineer.Com

Cyanide Leaching Of Gold Gold Cyanide Solution (Leaching Gold With Cyanide) Since the 1890's, cyanide has been used to recover gold from gold bearing ores. And today, over 115 years later, most of the worlds gold is recovered with cyanide playing a large part in

Gold extraction   </h3>OVERVIEWHISTORYTYPES OF ORECONCENTRATIONLEACHINGREFRACTORY GOLD PROCESSESGold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of small gold nuggets and flakes. Placer mining techniques since the mid to late 20th century have generally

Gold extraction

OVERVIEWHISTORYTYPES OF ORECONCENTRATIONLEACHINGREFRACTORY GOLD PROCESSESGold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of small gold nuggets and flakes. Placer mining techniques since the mid to late 20th century have generally
Roasting (metallurgy)

Roasting (metallurgy)

Sulfating roastingEdit. Sulfating roasting oxidizes certain sulfide ores to sulfates in a controlled supply of air to enable leaching of the sulfate for further processing. The sulfide ores of copper are heated in the reverberatory furnace. If ore contain iron, it is mixed with silica before heating.

Smelting and Roasting Ores to recover gold, silver and

Smelting and Roasting Ores to recover gold, silver and

Additives, such as common rock salt are often added to the mix before it is heated to enhance the reaction of the sulfides. Once the ores are fully roasted, and the sulfur is driven off, the extraction of the gold or silver from the ore is not especially difficult.