US915705A - Process of extracting gold, platinum, silver, nickel ...

My invention has for its object an improvement inthe said ways of industrial extraction, particularly. for gold, platinum, silver, nickel and copper. ... "Finally, there is chiefly a formation of compound insoluble silicates of magnesium, calcium, iron, etc., in consequence of the peculiar action, as above explained, of the silica in...

EP0049567A1 - Process for the extraction of precious metals from ...

Using this process gold, platinum and palladium of saleable purity can be extracted directly without the need for further refining steps. ... Such concentrates may also contain silver and base metal and other impurities, commonly copper, nickel, iron, selenium, tellurium, arsenic, antimony, tin, lead,bismuth and silica. [0003].

BBC - GCSE Bitesize: 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 ... extract by electrolysis. carbon. zinc; iron; tin; lead. extract by reaction with carbon or carbon monoxide. hydrogen. copper; silver; gold; platinum. extracted in...

Separating the Platinum Group Metals by Liquid-Liquid Extraction

and this paper highlights some of the chemical and process principles that underlie this method of separation. The platinum group metals platinum, palladium, rhodium, iridium, osmium and ruthenium together with silver and gold generally occur in nature associated with the major base metals iron, copper, nickel and.

Gold extraction - Wikipedia

Gold 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...

Platinum - Wikipedia

In 1786, Charles III of Spain provided a library and laboratory to Pierre-François Chabaneau to aid in his research of platinum. Chabaneau succeeded in removing various impurities from the ore, including gold, mercury, lead, copper, and iron. This led him to believe he was working with a single metal, but in truth the ore still...

Electrolytic Gold Extraction - 911 Metallurgist

The electrodes were of platinum and the solution was slowly agitated. ... A mere trace of gold was obtained. ... The extraction from the ores on filtering indicated that the current had aided in the solution of iron and copper to such an extent that precipitation was...

Palladium : Extraction and refining - ScienceDirect

Among these, palladium, gold and platinum have a high economic interest. The purpose of this work was the treatment of the solid residue produced from the iron dust precipitation, aiming to recover and refine the contained palladium. Development of the processing technological route for this material followed several...

Nickel processing | Britannica.com

... ranging from FeS to Fe7S8, in which some of the iron may be replaced by nickel. Chalcopyrite, CuFeS2, is the dominant copper mineral in these ores, with small amounts of another copper mineral, cubanite, CuFe2S3. Some gold, silver, and the six platinum-group metals also are present, and their recovery is important.

Gold processing | Britannica.com

Gold extracted by amalgamation or cyanidation contains a variety of impurities, including zinc, copper, silver, and iron. Two methods ... Fire assay is considered the most reliable method for accurately determining the content of gold, silver, and platinum-group metals (except osmium and ruthenium) in ores or concentrates.

Mining - The Canadian Encyclopedia

Mining is one of Canada's primary industries and involves the extraction, refining, and/or processing of economically valuable rocks and minerals. ... Important Canadian mineral products include precious metals (gold, silver, platinum) and diamonds; base metals (iron, copper, lead, zinc, nickel); energy minerals such as...

Copper, Silver and Gold

Nov 24, 2002 ... Although copper was probably originally encountered in nature as the native metal, it was also probably the first to be extracted by smelting from ores. Zippe proposes that this .... Gold and silver are usually recovered from the electrolysis sludge, and help the economics of the process. Modern smelting is...

Best and Easiest way to refine gold dust to get 99.9% purity - Finishing

But all I would like to learn is or get a detailed, simple, easy and best procedure to refine Platinum, Palladium or Rhodium Gold Dust. Is there any ... Dry it and melt it and you have 99.9% gold this way without the iron inside the metal. Anther way to ... Can you tell the process for extracting gold from the metal? Yash Vyas

Learn About Platinum - The Balance

Oct 5, 2017 ... This is the earliest known use of platinum, although pre-Columbian South Americans also made ornaments from gold and platinum alloys. Spanish ... In 1801, Englishman William Wollaston discovered a method for effectively extracting the metal from ore, which is very similar to the process used today.

Characteristics of Gold - The New 49ers

It is this quality of gold, having a superior weight factor over the other materials usually found along with it, that is used in most gold recovery methods. For example, watch in the .... The impurities with gold most often consist of silver, copper and a little bit of iron, platinum and cadmium in differing amounts. The proportions of...

Recovery of precious metals from waste streams - NCBI - NIH

Jul 13, 2017 ... Gold particles that are locked up in host rocks make the recovery by gravity or cyanidation methods difficult or even unfeasible (Marsden and House, 2006). ... For example, sewers contain platinum (Pt) particles stemming from automotive catalysts, wastewaters from hospital (e.g. chemotherapeutic drugs...

possible ways of refining precious group metals (pgm)

Oct 20, 2012 ... auto catalytic converters, e.g. Rose method, cyanide extraction, chlorination, segregation, melting methods, blow- ing with metal vapours and ... gold and PGM metals in primary ores (on average <. 0,01 g . kg-1) [2]. Therefore ... purified to obtain pure platinum and other metals or used then in this form for...

the recovery of platinum, palladium, and gold from a ... - SAIMM

Gold was selectively recovered with the use of Minix, while effective recovery of gold, platinum, and palladium over the base metals, copper, and iron, was achieved with Amberlite PWA-5. Successful elution of ... Leaching platinum group metals with cyanide, however, is a new concept and process option. The research...

Plasma power: increasing precious metal yields from complex ores ...

Apr 1, 2014 ... Complex ores such as zinc, nickel , copper and lead often conceal 'latent' precious metals, which conventional metallurgy cannot uncover or extract in any significant quantity, ... "You can't see whether gold, silver or platinum have been encapsulated by complex ores until you process them," he explained.

How to Melt Gold Out of Rocks | Sciencing

Jun 13, 2017 ... You can't actually melt gold from rocks; if you hold a rock over a flame hot enough to melt gold and expect the gold to dribble out, you're going to be disappointed. The process of extracting gold from ore is a multistep one, and historically it has involved the use of some dangerous chemicals, including...

Extraction of Metals Questions

The table gives information about the extraction of some metals. Metal. Date of discovery. Main source. Main extraction method. Gold. Known to ancient ...... 16720000. 0.0000001. Iron. 216. 4.1. Gold. 8236800. 0.0000001. (a) Use information in the table to suggest why gold and platinum are very expensive metals.

Gold Recovery: 8 Steps (with Pictures) - Instructables

Nov 15, 2013 ... Some people find it profitable to attempt to extract the gold from these scraps, then refine and sell it. ... Keep in mind that outdated electronics are likelier to produce parts with a high enough level of gold to make the procedure worthwhile. This is the .... And asked me "HOW DID YOU GET IRON IN THIS?

Natural Sciences Grade 9 - Mstworkbooks.co.za

Choose from the following list: gold, iron, coal, phosphate, manganese, diamond, chromium, copper and the platinum group metals (PGMs). Present your ... Extracting ores. topsoil; overburden; excavation; rehabilitation; slurry. Once the ore body has been identified, the process of getting the ore out of the ground begins.

Metals & Mining - Jewish Virtual Library

Six metals are mentioned in the Bible and in many passages they are listed in the same order: gold, silver, copper, iron, tin, and lead. Antimony is also mentioned. The metals are referred to in various contexts, including methods of mining, metallurgical processes of extracting the metal, and preparing finished products.

Chloride as an Alternative to Cyanide - SGS

Chlorination was the most popular process to extract gold, before it was rendered obsolete with the advent of the cyanidation ... The PLATSOL® process, originally designed to recover the platinum group metals (PGM's) from their ores and concentrates, provides an ..... copper was well eluted, but not iron. Batch CIP Tests...

Smartphone recycling | Feature | Chemistry World

Mar 20, 2017 ... This concentration process is repeated until it provides pure silver, gold, palladium, platinum and rhodium as well as salts of iridium and ruthenium and ... recovery for environmental and resource protection) aims to identify, extract and re-process neodymium–iron–boron magnets from electronic waste.

Platinum - Pricing and Trading, History, Production and Applications

Chabaneau succeeded in removing various impurities from the ore, including gold, mercury, lead, copper, and iron. ... Extraction. If pure platinum is found in placer deposits or other ores, it is isolated from them by various methods of subtracting impurities. Because platinum is significantly denser than many of its impurities,...

Gold Facts: How Much Gold is in the Earth's Core? - The Gold Lab

Once in the crust, processes through heat and water have deposited it in places you and I can find it. ... iron or nickel, even under heavy pressures, it is believed that the core also contains enough gold, platinum and other siderophile elements that if extracted and poured onto the Earth's surface it would cover the entire Earth...

Earth's gold and platinum arrived in a meteor shower lasting ...

Sep 7, 2011 ... The world's gold and platinum came from outer space after a mammoth meteorite shower battered the Earth four billion years ago, Bristol University ... The metals from these earth-shattering meteorites were stirred into the planet's mantle by gigantic convection processes. .... Read the Chapter named Iron.

Extraction of Reactive Metals

Iron Tin Lead, Chemical reduction by carbon – the carbon is heated with the metal oxide. (If the ore is a sulfide, it is roasted first of all to convert it to the oxide.) Copper Silver Gold Platinum, can be found native and separated from rock. (Copper and silver are often found in compounds, but are easily extracted, sometimes by...

How is platinum extracted from its ore - SlideShare

Sep 19, 2014 ... In addition, because nickel and iron have different magnetic properties to platinum they can be removed by running a powerful electromagnet above the mixture. ... However, the fact that other valuable metals can be extracted in tandem with platinum makes the whole process much more cost effective.

gold extraction mobile machine

Home > Gold, iron, copper ore > mobile gold extraction machine. mobile gold extraction machine. Gold Milling Equipment,Mobile Gold Processing Plant . ... mobile gold extraction machine- gold extraction mobile machine ,GSI Mining Systems - ECO-Friendly Gold Mining , GSI gold and platinum mining equipment and gold...

Metals and fossil fuels | Visual Dictionary - Ikonet.com

Some of the materials hidden in Earth's as metals (gold, iron, aluminium) or fossil fuels crust (coal, oil, natural gaz) are extremely useful to human beings. ... Today's advanced extracting and refining methods help mining companies obtain a wide variety of metals. Unfortunately, extracting metals and fossil fuels from...

Mining for metals in society's waste - The Conversation

Oct 1, 2015 ... Contemporary metal mining is dominated by iron ore, copper and gold, with 2 billion tons of iron ore, nearly 20 million tons of copper and 2,000 tons of gold produced every year. Tens to ... Moreover, there are potential environmental consequences related to their extraction, processing, use and disposal.

Forget Coal: Asteroid Mining Is Coming Sooner Than You Think

Jun 27, 2017 ... Asteroids are essentially massive rocks that orbit the sun, and many are thought to consist of platinum, gold, iron, and more. ... Proponents say that before long, robots could be traveling to asteroids to extract platinum and other valuable minerals to haul back to Earth or even one day to use in space-based...

Platinum: The mineral native Platinum information and pictures

Natural Platinum is fairly impure. It is always associated with small amounts of other elements such as iron, gold, copper, and nickel, and may also contain the rare metals iridium, osmium, rhodium, and palladium. These impurities can lower its specific gravity to as much as 14, whereas pure elemental platinum is 21.4.

3 Technologies in Exploration, Mining, and Processing ...

Read chapter 3 Technologies in Exploration, Mining, and Processing: The Office of Industrial Technologies (OIT) of the U. S. Department of Energy commissi. ... of rock, so extraction would cause minimal disturbance, and they consisted primarily of chalcocite with little or no iron sulfide that would produce acid-rock drainage.

Where does all Earth's gold come from? Precious metals the result ...

Sep 9, 2011 ... During the formation of Earth, molten iron sank to its centre to make the core. This took with it the vast majority of the planet's precious metals -- such as gold and platinum. In fact, there are ... The impacting meteorites were stirred into Earth's mantle by gigantic convection processes. A tantalising target for...

Recovery of Gold and Silver and Removal of Copper, Zinc and Lead ...

Materials Sciences and Applications Vol.06 No.02(2015), Article ID:54022,11 pages 10.4236/msa.2015.62020. Recovery of Gold and Silver and Removal of Copper, Zinc and Lead Ions in Pregnant and Barren Cyanide Solutions. Gabriela Figueroa1*, Jesus L. Valenzuela1, Jose R. Parga2, Victor Vazquez1, Alejandro...

Resources | Free Full-Text | Metal Extraction Processes for ... - MDPI

Feb 19, 2014 ... However, the presence of precious metals (PMs) in e-waste such as gold (Au), silver (Ag), platinum (Pt), Gallium (Ga), palladium (Pd), tantalum (Ta), tellurium (Te), germanium (Ge) and selenium (Se) makes it attractive for recycling. In this article, metal extraction processes from e-waste, particularly the...

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