extraction of metals in gold platinum zinc

extraction of metals in gold platinum zinc

Extraction of Gold from Platinum Group Metal Ores ...

Jan 01, 2016  2. Gold Extraction from Secondary Sources. The amount of gold that is recycled in the world is substantial and was estimated to be 150 t in 2014 (U.S. Geological Survey, 2015a, U.S. Geological Survey, 2015b).The main sources of scrap gold in the USA include discarded jewelry, scrap from jewelry manufacture, dental scrap, plating-bath solutions, scrapped electronic equipment, and gold

A new technique for extraction of platinum group metals by ...

Aug 01, 2006  Up to 90–94% Pt and 99% Pd extraction could be achieved, and cementation of the final solution with zinc powder resulted in a PGM concentrate containing about 70–90% of precious metals. Automobile catalysts have been one of the main consumers of PGMs so far, and much attention has been paid on PGM recovery from such wastes ( Mishra, 1993 ...

Recovery of Gold by Precipitation with Zinc

Mar 17, 2017  The recovery of the precious metals like gold and silver from the cyanide solution is almost universally accomplished by precipitation with zinc, either in the form of fine threads or of dust (the condensed fume recovered in the process of retorting the metal).. The phenomena of precipitation are essentially electrical and may be traced to the action set up by two metals of different ...

Extraction of gold from platinum group metal (PGM) ores ...

Jan 01, 2005  2. Gold Extraction from Secondary Sources. The amount of gold that is recycled in the USA is substantial, and is in the range of 170–200 tpa ().The main sources of scrap gold include discarded jewellery, scrap from jewellery manufacture, dental scrap, plating-bath solutions, scrapped electronic equipment, gold coins and medals.

Notes OCCURRENCE AND EXTRACTION OF METALS

present in nature. Such metals may remain in elemental or native (free) state in nature. Such metals are called "noble metals" as they show the least chemical reactivity. For example gold, silver, mercury and platinum occur in free state. On the other hand, most of the metals

Extraction of gold from platinum group metal (PGM) ores

Various techniques for recovering precious metals from pregnant solutions after cyanide leaching, including solvent extraction, resin ion-exchange, Merrill-Crowe zinc precipitation technology and ...

Extraction of Platinum Group Metals IntechOpen

Oct 02, 2017  1. Introduction. Platinum group metals (PGMs) are a group of six elements, namely iridium (Ir), osmium (Os), platinum (Pt), palladium (Pd), rhodium (Rh) and ruthenium (Ru) [1, 2].PGMs together with gold and silver are classified as noble or precious metals because of their high corrosion and oxidation resistance [1, 2, 3].The world’s reserves of platinum group metals/elements are

Zinc precipitation on gold recovery

suspended solids and then through the zinc boxes for metal precipitation. Vertical plates were installed in the boxes forming chambers to direct the flow of solutions through the beds of the zinc. The method proved to be effective but inefficient due to coating of the zinc surfaces with deposited metals or insoluble zinc hydroxide (Dorey, 1988).

Extraction Of Metals - SlideShare

Mar 03, 2009  Extraction of metals Only some unreactive metals such as silver, gold and platinum can occur freely in nature. Most metals react with other elements to form o Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.

(PDF) Treatment of gold-bearing solutions by cementation ...

The pregnant solutions containing the dissolved precious metals are treated by cementation with metallic zinc and high-grade mixed gold-silver concentrates are obtained in this way. View full-text ...

Metal Reactivity and Extraction - Metals

Metals with low reactivity can be found as elements - silver, gold and platinum. Metals up to and including zinc are extracted by heating with carbon (zinc, iron, tin, lead and copper) . Metals above zinc in the reactivity series (high reactivity) are extracted from their compounds by electrolysis of the molten compound (melted compound).

Extraction of gold from platinum group metal (PGM) ores

Various techniques for recovering precious metals from pregnant solutions after cyanide leaching, including solvent extraction, resin ion-exchange, Merrill-Crowe zinc precipitation technology and ...

Extraction of metals - SlideShare

Some examples of metals with low reactivity are: 1. Gold, 2. Copper, 3. Silver and 4. Platinum. 7. Gold Silver Platinum Some types of low reactivity metals: 8. The highly reactive metals: The highly reactive metals are the most difficult to extract from their ores.These metals are found in very stable compounds.

Asteroid mining - Wikipedia

Asteroid mining is the exploitation of raw materials from asteroids and other minor planets, including near-Earth objects.. Hard rock minerals could theoretically be mined from an asteroid or a spent comet. Precious metals such as gold, silver, and platinum group metals could be transported back to Earth, while iron group metals and other common ones could be used for construction in space.

Electrowinning - Wikipedia

Electrowinning, also called electroextraction, is the electrodeposition of metals from their ores that have been put in solution via a process commonly referred to as leaching. Electrorefining uses a similar process to remove impurities from a metal. Both processes use electroplating on a large scale and are important techniques for the economical and straightforward purification of non ...

the extraction of metals in silver gold platinum

Extraction of Platinum Group Metals IntechOpen. Oct 02, 2017 Platinum group metals (PGMs) are a group of six elements, namely iridium (Ir), osmium (Os), platinum (Pt), palladium (Pd), rhodium (Rh) and ruthenium (Ru) [1, 2].PGMs together with gold and silver are classified as noble or precious metals because of their high corrosion and oxidation resistance [1, 2, 3].The world’s reserves of ...

Overview of Extraction of Mineral/Metals with the Help of ...

metals/minerals, geofluid can be used for the extraction of water soluble minerals as well as precious metals. For example:- 1. The use of geothermal fluid in heap leaching for Silver and Gold extraction USA for use of geothermal in Round Mountain Gold and the

Earth's Limited Supply of Metals Raises Concern Live Science

Jan 19, 2006  If all nations were to use the same services enjoyed in developed nations, even the full extraction of metals from the Earth's crust and extensive

Metal Ore Mining - Minerals Industry Expertise from PEC ...

Metal Ore Mining. PEC Consulting provides the services needed to determine the viability of new mining projects. We offer our services to the metal industries as gold, lead, copper, silver, zinc and heavy sands mining, including: Analysis of reserves, exploration and minerals testing; Technical feasibility, energy efficiency, and environmental ...

1.1 PHASES OF A MINING PROJECT - ELAW

type of metals or materials to be extracted from the earth. The majority of proposed mining projects involve the extraction of ore deposits such as copper, nickel, cobalt, gold, silver, lead, zinc, molybdenum, and platinum. The environmental impacts of large-scale mining projects involving these metal ores are the subject of this Guidebook.

Metal extraction and the reactivity series - The ...

Metal extraction and the reactivity series. Metals are extracted from ores, which are minerals found in the Earth’s crust that contain metal compounds.

Electrochemistry Encyclopedia -- Extracting metals from ...

These impurities include precious metals – silver, gold and the platinum group metals – which are recovered by treatment of the sludge that falls to the bottom of the cell. Since impurities that do enter the electrolyte are less noble than copper, that is, are above copper in the electrochemical series, do not deposit on the negative electrode.

Metal extraction and the reactivity series - Iron and ...

The method used to extract metals depends on the reactivity of the metal. Metals are used for a variety of purposes. An alloy is a mixture of a metal and another element.

Extraction of Metals - Methods of Extraction of Metals ...

Very few metals such as the noble metals, i.e., Gold, Silver, and Platinum etc. are present in their original metallic forms in nature. Metallurgy is the field of science which deals with the extraction of metals from ores which are naturally found in the

Metal Reactivity and Extraction - Metals

Metals with low reactivity can be found as elements - silver, gold and platinum. Metals up to and including zinc are extracted by heating with carbon (zinc, iron, tin, lead and copper) . Metals above zinc in the reactivity series (high reactivity) are extracted from their compounds by electrolysis of the molten compound (melted compound).

Extraction of metals - SlideShare

Some examples of metals with low reactivity are: 1. Gold, 2. Copper, 3. Silver and 4. Platinum. 7. Gold Silver Platinum Some types of low reactivity metals: 8. The highly reactive metals: The highly reactive metals are the most difficult to extract from their ores.These metals are found in very stable compounds.

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

copper, silver and gold;copper replaces silver; lead replaces gold; platinum replaces gold, and so forth. Howev-er it should be noted that these reactions are not reversible and that the metals above hydrogen are soluble in ac-ids while the metals below hydrogen are insoluble in acids. Therefore, cementation is a process in a which Table 1.

1.1 PHASES OF A MINING PROJECT - ELAW

type of metals or materials to be extracted from the earth. The majority of proposed mining projects involve the extraction of ore deposits such as copper, nickel, cobalt, gold, silver, lead, zinc, molybdenum, and platinum. The environmental impacts of large-scale mining projects involving these metal ores are the subject of this Guidebook.

the extraction of metals in silver gold platinum

Extraction of Platinum Group Metals IntechOpen. Oct 02, 2017 Platinum group metals (PGMs) are a group of six elements, namely iridium (Ir), osmium (Os), platinum (Pt), palladium (Pd), rhodium (Rh) and ruthenium (Ru) [1, 2].PGMs together with gold and silver are classified as noble or precious metals because of their high corrosion and oxidation resistance [1, 2, 3].The world’s reserves of ...

Overview of Extraction of Mineral/Metals with the Help of ...

metals/minerals, geofluid can be used for the extraction of water soluble minerals as well as precious metals. For example:- 1. The use of geothermal fluid in heap leaching for Silver and Gold extraction USA for use of geothermal in Round Mountain Gold and the

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 of the ore at a temperature of about 350° C. in the presence of iron to form a mixture of volatile gold chlorides and volatile gold-iron chlorides in the chlorine off gases followed by condensing ...

Metals Mining Sell Side Handbook

The key commodities to know in the mining space are: Precious Metals: Gold (could be a grouping itself), Silver, PMG (Platinum, Palladium, Rhodium etc.) Base Metals: Copper, Aluminum, Zinc, Lead, Nickel, Tin Rare Earth Metals Bulk Commodities: Iron Ore, Metallurgical Coal (feedstock for steel). Despite the end of the big construction boom in China where bankers made very large amounts of

How can metal mining impact the environment? American ...

Material adapted from: Hudson, T.L, Fox, F.D., and Plumlee, G.S. 1999. Metal Mining and the Environment, p. 7,20-27,31-35,38-39. Published by the American Geosciences Institute Environmental Awareness Series. Modern mining operations actively strive to mitigate potential environmental consequences of extracting metals, and such operations are strictly regulated in the United

a) Extraction and uses of metals – IGCSE Chemistry revision

5.1 explain how the methods of extraction of the metals in this section are related to their positions in the reactivity series Metal Way of extraction potassium sodium calcium magnesium aluminium extract by electrolysis carbon zinc iron tin lead extract by reaction with carbon or carbon monoxide hydrogen copper silver gold platinum extracted by various

Plasma power: increasing precious metal yields from ...

New radio frequency plasma technology, which heats complex ores to over 8,000 degrees Celsius, freeing up hidden precious metals, could completely change the face of the mining industry, boosting yields of metals such as gold, silver and platinum from complex ores by jaw-dropping figures.

Gold refining by solvent extraction—the Minataur™ Process

The Journal of The South African Institute of Mining and Metallurgy JULY/AUGUST 1997 169 Introduction A solvent-extraction route developed at Mintek for the chemical refining of gold from chloride media has shown considerable promise for the selective extraction of gold from silver, platinum-group metals (PGMs), and base

Chemistry of Elements

Such metals may remain in elemental or native (free) state in nature. Such metals are called "noble metals" as they show the least chemical reactivity. For example gold, silver, mercury and platinum occur in free state. On the other hand, most of the metals are active and