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Jan 24, 2016· To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water.? 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if g sodium cyanide is used.
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Sep 29, 2010· Best Answer: 1. Iron ore contains O2, which needs to be removed, so during the smelting process C is used to attract the O2 molecules away from the Fe. The CO2 bond is stronger than the FeO2 bond. 2. Oxygen (O2) needs to be removed. 3. A native .
Jun 14, 2006· Best Answer: Extraction Of Iron Like the majority of metal ores, iron ores are not pure compounds. Rather, most iron ore compounds are polluted with sand, rock and silica. The process of extracting iron involves a number of steps. The first step to concentrate the iron ore and remove its contents of silica ...
Gold is usually found alone or alloyed with mercury or silver, but can also be found in ores such as calaverite, sylvanite, nagyagite, petzite and krennerite. Most gold ore now comes from either open pit or underground mines. The ores sometimes contain as little as 5/100 of an ounce of gold .
Gold extraction refers to the processes required to extract gold from its ores. ... Ores in which gold occurs in chemical composition with other elements are comparatively rare. ... How do you extract gold from quartz (99+ customer review) To extract the metal from the gold bearing quartz rock, a determination is made as to the ...
Oct 12, 2007· Extraction of Gold by ? The Gold and Platinum recovery process. Update ... Gold extraction from gold ore question? ... 5 answers I have a canal 16 feet across. I want to put a 4 foot wide bridge over it using 2 beams spread 3 ft. What size beams are needed.
Jan 22, 2007· To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if g sodium cyanide is used. g (b) If the mass of the ore from which the gold was extracted is g, what percentage of the ore is gold?
Sep 28, 2008· Best Answer: When aqua regia is used the metals get dissolved to give chloride. Since silver chloride is insoluble so AgCl will be precipitated out rather than giving a solution of a salt of silver. You can get a water soluble salt of silver from AgCl if aqua regia has been used. Evaporate to .
Oct 08, 2007· Best Answer: I doubt you''ve found titanium, as titanium as an element is not found in nature. It''s more likely you''ve found a titaniumbearing mineral such as ilmenite (FeTiO3) or rutile (TiO2). Both ilmenite and rutile are heavy, resistant minerals that can be separated from your gravel by placer washing the same as gold is recovered from gravel.
Apr 13, 2008· It is cheaper currently to use traditional smelting to extract copper from its ore, so bioleaching is not used in this case, but it is used more and more in gold extraction, since much of the ore has very little gold in it, so bioleaching is a cost effective option here (bioleaching is also used for refractory gold ore, that is, ore in which ...
Removing the goldbearing rock from the ground is just the first step. To isolate pure gold, mining companies use a complex extraction process. The first step in this process is breaking down large chunks of rock into smaller pieces. At a mill, large machines known as crushers reduce the ore to ...
Jun 04, 2008· How do you extract gold from rock ore by hand( by yourself )? Follow . 1 answer 1. ... How would you extract gold from a rock? Answer Questions. ... 7 answers If the Earth used to be molten, why is there still gold found at it''s surface? 7 answers ...
Nov 21, 2015· ore concentration: Bioleaching can extract metals from ores that are too poor for other technologies. It can be used to partially replace the extensive crushing and grinding that translates to prohibitive cost and energy consumption in a conventional .
Apr 13, 2013· I was wondering for a school project how palladium is extracted for use. I have asked this question before with no answers. ... How is palladium extracted for use? ... How to extract gold, platinium and palladium form iron ore at the same time? How to differenciate a cobalt chrome alloy from a silver palladium alloy?
Dec 28, 2007· Best Answer: A typical "rich" gold ore assays about a fifth to a tenth of an ounce of gold per ton (36 grams per ton). If your bag weighs, say, ten pounds (1/200 of a ton) then the amount of gold in it is probably in the order of to grams or at todays massive gold price about to, assuming that you could extract it for free.
Mar 20, 2013· What are the social and environmental impacts of extracting iron from its ore? ... 7 answers Why didn''t Fukushima cause way more diseases and deaths in Japan? 7 answers Has any attempt ever been made to "capture" a cloud? 9 answers More questions. If the Earth used to be molten, why is there still gold found at it''s surface? ...
Feb 10, 2011· How is gold extracted from earth? ... i''ve looked on loads of different websites but none of them explain it in a way in which i understand. any answers appreciated, many thanks. Follow . 3 answers 3. ... They simply crush up rock around a goldbearing quartz vein and move the ore where it is crushed even further and smelted. The gold is poured ...
For extracting gold from lowgrade ores, heap leaching is practiced; huge heaps are sprayed with a dilute solution of sodium cyanide, and this percolates down through the piled ore, dissolving the gold. There are very well defined rules for the safe and responsible use of cyanide – as laid out in the International Cyanide Code. Gold refining
Gold extraction refers to the processes required to extract gold from its 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 ...
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May 31, 2007· To extract gold out of ore or other metals, one way people have used for a while and still use is adding cyanide to the mixture, which causes the gold to ionize and go into solution.
Aug 03, 2011· Best Answer: Methods of extracting metals The Earth''s crust contains metals and metal compounds such as gold, iron oxide and aluminium oxide, but when found in the Earth these are often mixed with other substances. To be useful, the metals have to be extracted from whatever they are mixed with. A metal ore ...
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