Chlorine is used in(a) the extraction of gold and platinum(b) bleaching wood pulp(c) sterilising drinking water(d) All of the above📲PW App Link - https://bi...

A process for the extraction of gold from a gold-bearing ore or concentrate, comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90°C and an Eh of at least 900 mV. After a liquid/solids separation step, the solution obtained is subjected to …

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 …

Jul 26, 2008· Below 121*C: iron, copper, steel, lead, nickel, platinum, silver, and tantalum are resistant to dry chlorine. At "ordinary" temperatures dry chlorine reacts with: aluminum, arsenic, gold, mercury, selenium, tellurium, and tin. Titanium reacts violently with dry chlorine. The metals are resistant, but only to certain temperatures, after which ...

Jan 01, 2008· The results revealed that PKFAD could extract both gold(III) (up to 99%) and copper(II) (up to 92%) at distinct pHeq without and with an inert salt, with the highest extraction selectivity for ...

Jul 08, 2015· Miller's Gold Chlorination process was introduced by F.B. Miller. The refining process employs chlorine gas, which passed into molten gold covered with a layer of borax and silica, and reacts with most of …

Feb 24, 2013· I know the process of extracting gold from ores by passing chlorine gas through a barrell or vat was used just prior to cyanide in the late 19th century, especially on ores that contained refractory gold. I am wondering if anyone has tried to have a go at this technique on a smaller scale...

Jan 19, 2021· A temperature of 24° to 30° C in the chlorination pulps was considered to be near-optimum for gold extraction by subsequent cyanidation. A chlorine addition rate …

Gold Extraction Equipment Gold Ore Crusher. Gold Extraction Equipment. ... The cheaper first stage of purification is the Miller process which uses chlorine gas and reaches purification of 99. 5%, ... Inquire Now; gold processing Britannica.com. gold processing: preparation of the ... With E.B. Millers process of refining impure gold with ...

Jul 18, 2010· what it is and how dry chlorine extraction works ---for gold and pgm ? Reply. B. Barren Realms 007 In Remembrance. Joined Apr 2, 2009 Messages 4,598 Location Arkansas. Jul 17, 2010 #2 You can use dry chlorine in place of clorox with HCL. Reply. P. Platdigger Well-known member Supporting Member. Joined Jul 26, 2007 …

Nov 08, 2017· Extracting gold from an ore required more reagents and longer retention time because sulphide and gangue minerals consumed sodium hypochlorite and hydrochloric acid. In a leach solution containing 20 % HCl and 20 g/L NaCl, 97 % of the gold was extracted in 6 hours with 90 kg/t available chlorine and 95 % of the gold was …

Chlorine Gold Extraction From Hematite. Fine Gold Recovery Separating Placer Gold Particles from . Black sands with a specific gravity of around 5 (meaning an equivalent volume of black sands is five times heavier than water) is generally made up of hematite and magnetite Magnetite is known to be highly magnetic and this will help in the ...

Mar 16, 2016· The data show that a supersaturated solution of chlorine in water acts more strongly than one that is merely saturated, that a supersaturated solution can extract a satisfactory percentage of gold from a gold-silver alloy containing as much as 20 per cent, of silver, and that with the decrease of chlorine below a certain amount (2.1 g.) and the …

4,353,740 Chlorine extraction of gold Filed September 11, 1981 4,349,516 Process for treating the gas stream from an aluminum value chlorination process Filed April 20, 1981 4,331,645 Alumina from alkali. Prices / Quote. Bleach Vinegar And …

Mining Chlorine Gold E Traction - Search. T23:11:55+00:00. Leach Gold by Sodium Hypochlorite / Chlorine . 19/01/2021 Chlorine was added over an 8hr period at the rate of 3,5 lb per ton per hr initially, and decreased to 15 lb per ton per hr over the last 25 hr Gold extractions of 89 pct (0035 oz gold per ton tails) were obtained using ...

Apr 30, 2018· Working at a rate of 15 tons per day of mineral concentrate, the plant demonstrates the following yields: Sulfide: 99.4%. Mercury: 98.7%. Copper: 95%. Gold: 94.9%. The environmental advantages of this revolutionary process are significant: It not only avoids the hazards of cyanide, but also eliminates the need for tailings ponds and …

Mar 01, 2009· Results indicate that gold extraction is favored by increasing, both, the temperature and the reaction time. The best recovery values were of 98.23% at 873 K …

The Newbery-Vautin chlorination process is a process to extract gold from its ore using chlorination and was developed by James Cosmo Newbery and Claude Vautin.. Background. The process of extracting and reducing gold from ores via its absorption in chlorine gas is a process that was first introduced by Karl Friedrich Plattner around …

Jan 01, 2013· From "Getting Gold: A practical treatise for prospectors, miners and students" Written by J.C.F. Johnson, F.G.S. (1898) The most scientific and perfect mode of gold extraction (when the conditions are favourable) is lixiviation by means of chlorine, potassium cyanide, or other aurous solvent, for by this means as much as 98 per cent of …

Aug 24, 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...

Aug 31, 2016· Chlorination Process for Gold. This process was based on the fact that chlorine, in the presence of moisture, converts gold into the trichloride AuCl3, …

Oct 31, 2016· The use of chlorine as an agent for the extraction of gold from ores was first suggested by Dr. John Percy, F.R.S., at the Swansea meeting of the British Association, in a paper embodying the results of experiments carried out later. ... The amount of chlorine to be used depends mainly on the substances present, other than gold, by which ...

Dissolution of metallic gold was studied [5] by generating chlorine « in situ » from the reaction between commercial sodium hypochlorite and hydrochloric acid . ... Gate.io currently experiences. Bitcoin Mining Computer Build The bitcoin halving Bitcoin Mining Computer Build The bitcoin halving will seen the number of tokens rewarded to those ...

Feb 24, 2013· I know the process of extracting gold from ores by passing chlorine gas through a barrell or vat was used just prior to cyanide in the late 19th century, especially …

The Newbery–Vautin chlorination process is a process to extract gold from its ore using chlorination developed by James Cosmo Newbery and Claude Vautin Background 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

The process of extracting and reducing gold from ores via its absorption in chlorine gas is a process that was first introduced by Karl Friedrich Plattner around 1848, and at that time promised to revolutionize gold extraction. Due to a variety of reasons, it was found that only experienced chemists could work this process successfully. Lime and magnesia could be contained in the quartz and would be attacked by the chlorine.

How to Use Bleach on Gold Ore to Remove Gold Sciencing24 Apr 2017 Gold is an almost non-reactive metal but halogens — chlorine bromine This was the first commercial method used for gold extraction. cyanide management - Department of Industry Innovation and n Most gold is extracted using cyanide because it remains the chemical of choice for ...

Jun 01, 2007· At the low temperature of 10 °C, ultrasound-assisted extraction increased extraction rate of gold by 0.6%-0.8% and reduced the gold content of cyanide tailings to 0.28 g/t in the leaching of gold ...

The principle of the method exploits the nobility of gold, such that at high temperatures, gold does not react with chlorine, but virtually all contaminating metals do. Thus, at ca 500 °C, as the chlorine gas is passed through molten mixture (again, mainly gold), a low-density slag forms on top, which can be decanted from the liquid gold.

Mar 01, 2009· Results indicate that gold extraction is favored by increasing, both, the temperature and the reaction time. The best recovery values were of 98.23% at 873K and 3600s and of 98.73% at 873K and ...

The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about 350° C. in the presence of iron to form a mixture of...

Gold is extracted in anionic form from chlorine-bearing solutions by means of extraction by stable emulsion of aqueous solution of water-soluble sulphite in sulphur-bearing crude. EFFECT: lower gold extraction costs due to increased gold concentration, replacement of expensive extracting agents by low-cost sulphur-bearing crude and combination ...