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chlorine extraction of gold

US4353740A - Chlorine extraction of gold - Google Patents

A process for treating a particulated gold bearing ore to recover the gold therein is disclosed. The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination...

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Gold Chlorination Processes Methods

17/03/2017  Chlorination Process for Gold. This process was based on the fact that chlorine, in the presence of moisture, converts gold into the trichloride AuCl3 , which is soluble in water and removed by washing, the gold being then precipitated by ferrous sulphate, sulphur dioxide, hydrogen sulphide, or charcoal. Coarse gold requires long contact and should be removed by amalgamation.

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Gold extraction by chlorination using a pyrometallurgical ...

01/03/2009  The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using chlorine as a reactive agent, has been studied. The influence of temperature and reaction time was studied through changes in the reactant solid. The techniques used to characterize the mineral samples and the reaction residues were stereomicroscopy, X-ray diffraction, X-ray fluorescence and scanning electronic microscopy. Results indicate that gold extraction

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Newbery–Vautin chlorination process - Wikipedia

The process of gold extraction from ores via its absorption 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 Plattneraround 1848, and at that time promised to revolutionize the processes for gold extraction. By degrees it was found that only a very clever chemist could work this process with practically perfect results, for many reasons. Lime and magnesia might be contained in the quartz, and would be attacked by the chlorine. These consum

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The Chlorination of Gold Ores.

plying chlorine for the solution of gold, patents were taken out year by year for inventions which disclosed no more than the Germans made public. Deetkin introduced the so-called Plattner process into Cali-fornia in 1858, and patented it in 1863! In 1864 De Lacy ob-tained a Victorian patent for the use of chlorine under pres-sure. He proposed to hang a barrel vertically on trunnions

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Gold Extraction by Chlorination Process - YouTube

24/08/2014  Modern technology has improved the process of using chlorine as a method to dissolve gold. Resin technologies have virtually eliminated the early problems as...

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The Chlorination of Gold Ores.

plying chlorine for the solution of gold, patents were taken out year by year for inventions which disclosed no more than the Germans made public. Deetkin introduced the so-called Plattner process into Cali-fornia in 1858, and patented it in 1863! In 1864 De Lacy ob-tained a Victorian patent for the use of chlorine under pres-sure. He proposed to hang a barrel vertically on trunnions

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Gold extraction by chlorination using a pyrometallurgical ...

01/03/2009  The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using chlorine as a reactive agent, has been studied. The influence of temperature and reaction time was studied through changes in the reactant solid. The techniques used to characterize the mineral samples and the reaction residues were stereomicroscopy, X-ray diffraction, X-ray fluorescence and scanning electronic microscopy. Results indicate that gold extraction

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Gold extraction by chlorination using a

Chlorine extraction of gold. United States Patent, 4.353.740. Dunn Jr., W.E., Carda, D.D., Storbeck, T.A., 1991. Chlorination process for recovery gold values from gold alloys. United States ...

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US Patent for Chlorine extraction of gold Patent (Patent ...

Chlorine extraction of gold . Sep 11, 1981. A process for treating a particulated gold bearing ore to recover the gold therein is disclosed. The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about 350gree. C. in the presence of iron to form a mixture of volatile gold chlorides and volatile gold-iron chlorides ...

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Chlorine Extraction Of Gold

Feb 05, 2013 In using chlorine to extract gold you simply crush the stone or matrix so fine that it can get at the gold and take hold of it. Prices / Quote Newberyvautin Chlorination Process Wikipedia

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Processing, smelting and refining gold World Gold

The Miller process uses gaseous chlorine to extract impurities when gold is at melting point; impurities separate into a layer on the surface of the molten purified gold. The Miller process is rapid and simple, but it produces gold of only about 99.5 percent purity. The Wohlwill process increases purity to about 99.99 percent by electrolysis. In this process, a casting of impure gold is lowered into an electrolyte solution

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International Journal of Mining Science and Technology

Gold ores Refractory ores Leaching Chlorine abstract This paper deals with gold extraction from a refractory concentrate by chlorine leaching. The process considers a pre-treatment of refractory materials by low temperature oxidation carried out with low oxygen concentration. The oxidized material is treated by leaching with brine. After gold adsorption/

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Gold(III) chloride - Wikipedia

Gold chloride, traditionally called auric chloride, is a chemical compound of gold and chlorine. With the molecular formula Au2Cl6, the name gold trichloride is a simplification, referring to the empirical formula, AuCl3. The Roman numerals in the name indicate that the gold has an oxidation state of +3, which is common for gold compounds. There is also another related chloride of gold, gold chloride. Chloroauric

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Gold processing Britannica

With E.B. Miller’s process of refining impure gold with chlorine gas (patented in Britain in 1867) and Emil Wohlwill’s electrorefining process (introduced in Hamburg, Ger., in 1878), it became possible routinely to achieve higher purities than had been allowed by fire refining. Ores

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Chlorine Extraction Of Gold

chlorine extraction of gold greatermscfc. Jaw Crusher. Xinhai jaw crusher Roasting and chlorine leaching of gold-bearing A process for treating a particulated gold bearing ore to recover the gold . Get Price. recovery of gold from ores with chlorine in 1898 Page 1 . Get Price; Newbery–Vautin chlorination process - Wikipedia . In Liddell’s Handbook of Nonferrous Metallurgy, Vol. 2, 1945 ...

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Gold extraction by chlorination using a pyrometallurgical ...

01/03/2009  The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using chlorine as a reactive agent, has been studied. The influence of temperature and reaction time was studied through changes in the reactant solid. The techniques used to characterize the mineral samples and the reaction residues were stereomicroscopy, X-ray diffraction, X-ray fluorescence and

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Gold extraction by chlorination using a pyrometallurgical ...

The objective of this research was, on one hand, to study gold extraction from an alluvial material, through a pyrometallurgical process, using chlorine gas as a reactant, and, on the other hand, to characterize the initial material and chlorination residues, using X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning

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Gold Chlorides: Naturally Concentrating the King of

But, there is a natural process involving chlorine that concentrates gold under volcanoes and forms deposits that are worth the expense of mining. The compounds gold chloride (AuCl) and hydrogen gold chloride (HAuCl 2) play important natural roles in making gold accessible to us. Steamed out of Magma.

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The recovery of gold from refractory ores by the use of ...

Recently, the U.S. Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores, comparing various treatment methods in which a ground ore pulp is contacted with chlorine gas and activated carbon is added to the pulp for a carbon-in-chlorine leach (CICL). The objective of this research was to demonstrate the basic feasibility of CICL technology.

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Leaching of an oxide gold ore with chloride/hypochlorite ...

A high level of 9 g/L of added HCl causes HClO to be very reactive, producing very fast kinetics, reaching 67% gold extraction in 4 h. It also causes a faster consumption of hypochlorous acid ...

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CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

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. These methods include

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US4941917A - Process for recovery of precious metals from ...

The method of claim 1 wherein the aqueous solution of chlorine dioxide is added to the ore slurry prior to pH adjustment. 3. The method of claim 2 wherein the ore contains gold and wherein the...

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Chlorine Extraction Of Gold

chlorine extraction of gold greatermscfc. Jaw Crusher. Xinhai jaw crusher Roasting and chlorine leaching of gold-bearing A process for treating a particulated gold bearing ore to recover the gold . Get Price. recovery of gold from ores with chlorine in 1898 Page 1 . Get Price; Newbery–Vautin chlorination process - Wikipedia . In Liddell’s Handbook of Nonferrous Metallurgy, Vol. 2, 1945 ...

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Fritz Haber - Wikipedia

Fritz Haber found a way of making nitrogen compounds from the air. They have two main uses: fertilizers and explosives. His process enabled Germany to produce vast quantities of armaments. (The second part of the title refers to a process for obtaining gold from

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chlorine gold extraction from hematite

chlorine gold extraction from hematite indiacarezin hematite ore using by medical chlorine chlorine gold extraction from hematite applications of chlorine to. 【Service Online】 Hematite. Hematite, also spelled as haematite, is the mineral form of iron(III) oxide (Fe 2 O 3), one of several iron oxidIt is the oldest known [clarify] iron oxide mineral and is widespread in rocks and soils ...

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