Jan 09, 2009· Jan 09, 2009 #1. 2009-01-10T02:04. While Idaho, Oregon, Colorado, California, and Arizona are known places for gold tellurides; Utah and Nevada have there share of little known places also. There was much gold tellurides found in the Tintic Mountains of Utah. Namely the Mamouth Mine site of old time fame. It was claimed that up in the Granddaddy.

Smelting and Roasting Gold and Silver Ores. Interested in The processes of smelting or roasting your ore to recover its gold and silver? Some fairly rich ores require a lot of work to get all the gold and silver out them. Historically, smelting and roasting of ores have been used to capture the gold …

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 only one sulfide, the telluride-sulfide mineral nagyagite, ii:; known. The nonmetallic minerals carry the least gold, and the light-colored minerals generally contain less gold

Jan 02, 2011· Common Telluride ores are: Calaverite - can assay from 20- 70% gold and it is easy to recover. Hessite - Resembles Petzite. Usually about 60% silver. Petzite - A telluride that is mostly silver. Silver content is usually twice that of gold. Sylvanite - A telluride of gold and silver. It can assay as high as 20% gold.

Gold from smelting (oz. bullion) Average grade Ð excluding concentrates (dwt per ton) Total gold all sources (oz. bullion) Gold from smelting % of total Associated Gold Pre1898 9,512 19,209 40.4 30,123 64 Mines WA 1898 3,379 17,319 102.5 41,888 41 1899 29,869 74,522 49.9 …

Jan 01, 2005· Concentrating and smelting techniques were found to be able to successfully recover most of the telluride-associated gold, achieving around 95% recovery without a leach step; however, because no smelting facility was available locally, the ore had to be transported to suitable smelters in the eastern colonies (South Australia and New South Wales).

Gold bearing tellurides were important in some of the richest ores at Goldfield, Nevada – high grade ore that contained upwards of 10,000 ounces of gold per ton. If you have tellurides in your ore, it's important that you are aware of that fact, because it affects how you will process it.

Roasting is a process of heating a 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 gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore has already been partially purified, e.g. by froth flotation.

May 18, 2017· I wanted to show some of the experiments we are working on here at MBMM. I want to determine the best collector metal for recovering gold from black sand/su...

Fissure-fill networks are a widely recognized, but relatively little described, near-surface phenomenon (<1–2 km) hosted in carbonate and crystalline basement rocks below regional unconformities. Faults and fractures in otherwise tight Devonian carbonate basement rocks of the Tor Bay region, Devon, SW England are associated with the development of millimetre- to decametre-wide fissures ...

For the extraction of gold from telluride ores in practice, the use of melting on the lead or copper collector. If you cannot melting telluride ore lanroot in special modes. Alternative smelting is firing tellurite and cyanide leaching of the calcine. Direct cyanide leaching of gold from telluride ores slow.

The gold mineralization occurs in every rock type and is mostly controlled by structure. It can occur as native gold, electrum, gold tellurides, gold-silver tellurides, and with sulfides (Leichliter and Larson, 2011). Silver is also present, but to a lesser degree than gold.

Melting point of steel: 1425-1540 °C / 2600-2800 °F Melting point of gold: 1064 °C / 1947.5 °F Melting point of copper: 1084 °C / 1983 °F Melting point of iron: 1538 °C / 2800 °F Melting point of lead: 327.5 °C / 621 °F Melting point of silver: 961 °C / 1761 °F. Download Reference Sheet:

smelting gold from tellurides - Primary Stone Crusher ... This picture here is one off the web of Calaverite, a heavy gold telluride. ... we smelting and roasting processing mill extract gold ore ... Smelting Gold ... how to extract tellurium from gold ores – Grinding Mill China .

Chemistry: Ag2Te, Silver Telluride. Class: Sulfides. Subclass: Tellurides. Uses: As mineral specimens and as a very minor ore of silver and tellurium. Specimens. Hessite is named after the nineteenth century Swiss chemist and Professor of St. Petersburg Mining Institute, Germain Henry Hess. He was the first to analyze specimens of this mineral ...

Although the gold-telluride ore mined on the Gem vein came from the 12th level, most of the telluride ore thus far mined has been obtained within 125 feet of the surface and has contained free gold in even greater abundance than tellurides. This gold is partly and perhaps wholly the result of the oxidation of gold-telluride minerals.

PLATINUM REFINERIES. Platinum Refineries is a full service refiner, assayer, smelter and broker of all precious metals. Industrial Platinum, Medical Platinum, Jewelry Platinum, Rhodium, Palladium, Gold and Silver assaying and refining is what we specialize in. Platinum Refineries provide our customers with a state-of-the-art laboratory, utilizing the most advanced induction and chemical ...

METHODS OF ASSAY OF GOLD TELLURIDE ORES. [BOLL. 253. through the kindness of Mr. W. M. Bainbridge, of the El Paso Con­ solidated Gold Mining Company, and of Dr. Waldemar Lindgren, of the Geological Survey, the samples were marked 6 and 12 ounces per ton respectively, but they were actually much richer and of nearly

Nov 18, 2016· Hillebrand and Allen found that the crucible assay is perfectly satisfactory for telluride ores from Cripple Creek. The charge giving the best results on ores containing from 15 to 20 ozs. of gold per ton was as follows: The losses of gold in the slag were generally small. The losses by cupel absorption were much more serious.

gold sulfides all telluride gold platinum group metals $$$$$ see our gold processing ( we are located in western colorado ) ( see : products page – gold processing – for details ) years ahead of our competition super concentrate ready to smelt without the cost we will be happy to show you our 500 count pin head

Roasting of gold and silver ores : and the extraction of their respective metals without quicksilver Item Preview remove-circle Share or Embed This Item. Share to Twitter. Share to Facebook. Share to Reddit. Share to Tumblr. Share to Pinterest. Share via email.

Dec 06, 2019· Other sources can include flue dust and gases produced during lead, bismuth, gold, nickel and platinum smelting. Such anode sludges, which contain both selenides (a major source of selenium) and tellurides, often have a tellurium content of more than 5% and can be roasted with sodium carbonate at 932°F (500°C) to convert the Telluride to ...

Flotation concentrates are usually sent to an off-site smelting facility for recovery of gold and base metals. Cyanide leaching is frequently used in conjunction with flotation. Cyanidation of flotation concentrates or flotation tailings is done depending upon the specific mineralogy and flowsheet economics. ... Ores containing gold tellurides ...

Jul 14, 2016· as gold tellurides, as gold associated with pyrite, the residue losses were almost entirely due to incomplete solution of the gold associated with the pyrite. ... The gold can be removed from calcines by volatilization with salt in an oxidizing atmosphere, and also by smelting with lead, but there are economic and technical problems involved in ...

Oct 31, 2016· Tellurides Roasting. Tellurides containing gold are fusible far below a red heat, and heavy losses of gold may occur through absorption by the furnace bottom. The melted tellurides of gold may remain in the ore, and in that case at a red heat the tellurium is partly volatilised and partly oxidised to the oxide TeO2, which also sublimes.

Jan 01, 2016· Concentrating and smelting techniques were found to be able to successfully recover most of the telluride-associated gold, achieving around 95% recovery without a leach step; however, because no smelting facility was available locally, the ore had to be transported to suitable smelters in the eastern colonies (South Australia and New South Wales).

Feb 28, 2016· Electric Gold smelting Furnace. The flux is a mixture of several reagent chemical such as borax, silica, sodium nitrate, sodium carbonate and fluorspar. Borax is a white crystalline mineral used in glass and ceramic enamel mixes. In the smelting process, borax helps to reduce the gold smelting point of the charge and capture metallic oxides ...

Jul 20, 2001· Gold is a good conductor of heat and electricity, and is unaffected by air, nitric, hydrochloric, or sulphuric acid and most other reagents. A mixture of one part nitric acid with three parts hydrochloric acid, called aqua regia, dissolves gold. It is also dissolved by solutions of azoimide. Further, it is attacked by sodium, and potassium ...