how does the process extracting gold occurs

  • Gold Processing Methods & Gold Ore Extraction

     · Gold Processing Methods & Gold Ore Extraction. Of all the methods of extracting gold & processing it from its ore, I used a few to evaluate two principal flowsheets in this case study. The flowsheets utilized operations that involved flotation, …

  • Mining and mineral processing | The lithosphere | Siyavula

    We will now discuss gold mining in more detail to gain a better understanding of the mining process. Gold mining (ESBRJ) Gold had long been known in Africa by the indigenous people, but in the late 1800''s colonists found gold reefs and started exploiting the resource.

  • How Does Gold Mining Affect the Environment?

     · Gold mining affects the environment in many negative ways, including the release of large amounts of exhaust from heavy equipment and transport, toxic drainage into nearby waterways and the release of mercury fumes from ore processing. Gold is most commonly mined in open pits dug specifically for that purpose.

  • ehow extracting gold with sodium hydroxide

    The process consists of leaching the gold with dilute sodium cyanide and sodium hydroxide solution followed by adsorption of the soluble gold onto activated carbon. The barren cyanide solution after carbon adsorption is recycled back to the leach circuit and the loaded carbon is …

  • New method extracts gold from liquid waste

     · Gold isn''t just found deep underground. It''s all around us, only we can''t easily get at it. This new technique enables us to extract gold from almost any kind of liquid waste.

  • Gold extraction process

    To extract gold with the CN process, you''ll first have to separate the metal items in a CPU, Motherboard and other computer parts that contain gold. Later, these scrap pieces have to be washed with a moderate strength acid solution to remove plastic, rubber, epoxy and composite.

  • Rough Science . New Zealand . Treasure Hunt . Extracting …

     · The gold we mined this way came out as tiny dark bits, but it was definitely gold. I don''t know how efficient the process was, but we probably got a couple of grams of gold from several large ...


    Gold occurs mainly as native metal, alloyed with silver and/or other metals, and as tellurides. A naturally occurring alloy of gold and silver is known as electrum. Other gold minerals are rare. Gold is commonly associated with the sulfides of antimony, arsenic3

  • extracting gold: Gold

     · Gold extraction is most economical in large, easily mined deposits. Ore grades as little as 0.5 mg/kg (0.5 parts per million, ppm) can be economical. Typical ore grades in open-pit mines are 1–5 mg/kg (1–5 ppm); ore grades in underground or hard rock mines are usually at least 3 mg/kg (3 ppm).

  • The silver extraction process

    The Silver Extraction Process The ore used to extract silver was not a silver ore but Lead Sulphide (formula PbS), known as Galena or Galenite (named by the Roman Pliny) which contains 87% lead. The local variety of Galenite is silver-bearing and is (Pb.Ag)S ...

  • 4 Processes To Extract Gold From Its Ore

     · The agglomerates are burned in order to produce a product with high gold content or can be smelted for producing metallic gold. The process involves simple and known unitary processes: mixing, flotation, burning, and smelting. The main …

  • Gold from ocean? Extraction from seawater

     · 2003 A. Hi, Louis. I can''t tell if your question is student homework, a concern about an investment scheme/scam that has been presented to you, or a serious engineering question. But if it was intended as a serious question, the issue is that practically extracting the gold from seawater hasn''t been achieved, whereas everyone has known for decades that it''s theoretically possible.


    Gold and platinum occur in the Earth as native metal. This means that they are found as the element, not the compound, and so do not need to be reduced. Silver and copper may also be found as native metal. Links Revision Quizzes

  • how to make electrolysis to extract gold

     · Gold extraction – Wikipedia, the free encyclopedia Gold occurs principally as a native metal, … and in modern times using chlorination using the Miller process and electrolysis using the Wohlwill process … »More detailed

  • How is Gold Extracted? » Vaultoro

     · This occurs when one finds gold along with sulfide minerals, such as pyrite. Recovering the gold from sulfide concentrates will often require further processing, but froth flotation can …

  • Rcovery of gold in pyritic ores

    Geologists and mineralogists have many theories why and how the gold occurs with the pyrite, and I will not enter into any of these areas, since I am concerned with liberating the gold from the ores. I will say that from my understanding, many seem to agree that in sulfide gold ores, the occurrence of gold appears to occur as a replacement of other minerals, possibly iron.

  • Extracting Gold from Dirt: Gold Sluicing and History of …

     · Join Honey for FREE at: https:// This year, I''m making money (and GOLD)! Specifically, I''m going through the history of mone...

  • Can Gold be Extracted from Seawater? (with pictures)

    Extracting gold from seawater is impractical. By far the most common metals in seawater are sodium, magnesium, calcium and potassium, in that order. These are all very common, in combined form, in the Earth''s crust, and they can form a variety of compounds that are very soluble in water.

  • Extracting Gold from E-Waste

     · Bioleaching Microbiological processes have been proposed over the last decade as possible alternatives to extracting precious metals such as copper, gold, palladium and silver from e-waste. Bacteria such as Thiobacillus ferrooxidans and T. …

  • Bioleaching Process

    Bioleaching Process - Mining Fundamentals. Bioleaching, or microbial ore leaching, is a process used to extract metals from their ores using bacterial micro-organisms. The bacteria feed on nutrients in the minerals, causing the metal to separate from its ore. The metals commonly extracted using this process include gold, silver, zinc, copper ...

  • how does the process extracting gold occurs

    Gold mining underground and the extraction of gold A gold bar being cast Even though the precious metal gold only occurs very rarely indeed, it can be found The Best Gold Extraction Gold extraction process,gold recovery,teaching extract gold from

  • Gold extraction

     · The most common solvent is cyanide, which must be combined with oxygen in a process known as carbon-in-pulp. As the cyanide and oxygen react chemically, gold in the pulp dissolves. When workers introduce small carbon grains to the tank, the gold

  • How is gold found and extracted from mines?

     · Using a chemical solvent, usually cyanide combined with oxygen, the gold is extracted from the pulp inside these tanks; but it is still not pure gold. This process is known as carbon-in-pulp. The result is gold that is attached to carbon. The next step is to remove the gold …

  • Process Of Extracting Mining Turquoise Ore

    Egypt is where the worlds first emerald mine is located, in the mountain valley of Wadi ... mining expeditions in pursuit of building stone, copper, gold, turquoise, ... at an advanced stage in the process of extraction, due to faults in the stone.

  • Gold Processing,Extraction,Smelting Plant Design, …

    Flotation process are widely used for improving the sulfide type gold ore grade. The ore pulp slurry is pumped to flotation cells for extracting. The flotation cells are divided into several parts: roughing, concentration and scavenging (the exact numbers of stages for ...

  • mining and extracting gold

    Mercury Usage in Gold Mining and Why It Is a Problem · Mercury first was used to extracting gold as many as 3,000 years ago. The process was prominent in the U.S. up until the 1960s, and the environmental impact on northern California is still felt today

  • Extracting iron and copper

     · Extracting a metal by heating with carbon is cheaper than using electrolysis. Question In the reaction of iron(III) oxide with carbon, state which substance is reduced and which substance is oxidised.

  • cyanide process | Infoplease

    cyanide process. cyanide process or cyanidation, method for extracting gold from its ore. The ore is first finely ground and may be concentrated by flotation; if it contains certain impurities, it may be roasted. It is then mixed with a dilute solution of sodium cyanide (or potassium or calcium cyanide) while air is bubbled through it.

  • Methods of Extraction | Edexcel GCSE Chemistry Revision …

    The Earth''s crust contains metals and metal compounds such as gold, copper, iron oxide and aluminium oxide. Useful metals are often chemically combined with other substances forming ores . A metal ore is a rock that contains enough of the metal to make it worthwhile extracting.

  • Processing, smelting and refining gold | World Gold Council

    Extraction of Gold

  • Extracting metals

     · Extracting metals Ores Unreactive metals such as gold are found in the Earth''s crust as uncombined elements. However, most metals are found combined with other elements to …

  • Gold Mining Process / How is Gold Mined?

     · This video goes through a mine and shows how they mine their GOLD.Thanks for Watching,Subscribe Below!Gold miningHow is gold mined?

  • How Is Gold Formed? Origins and Process

     · Scientists believe all the gold on Earth formed in supernovae and neutron star collisions that occurred before the solar system formed. In these events, gold formed during the r-process. Gold sank to the Earth''s core during the planet''s formation. It''s only

  • Extraction of Gold

    Gold can be extracted by washing only when it is present as metal in the form of particles which are not too minute. The washing removes the specifically lighter parts of the material, the heavier gold particles sinking to the bottom. The process is applicable

  • Aqua Regia Process | Gold Extraction from aqua regia

     · Aqua regia is a Latin word which means royal or kings water. so named by alchemist because it can dissolve noble metals like gold and platinum. This article is about aqua regia process for gold dissolving and extracting. Aqua regia is a combination of HCL and HNO3. 3 parts of HCL and 1 part of HNO3 make aqua regia for gold dissolving.

  • Boardworks GCSE Science: Chemistry Extracting Metals

    Gold and other unreactive metals occur native . Metals that are found in the ground as uncombined elements do not require ... Electrolysis is a process that uses electricity to separate the elements in a compound. The word electrolysis means ''splitting with ...

  • Gold | Geoscience Australia

    Native gold, R30017. Source: Geoscience Australia. Gold, like iron, copper, lead and tin is a metal. Gold is the only yellow metal and is chemically very stable. It does not readily combine with other substances and, therefore, does not corrode or tarnish. Because of this property, it is almost always found in nature as pure gold.

  • 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.

  • How Gold Is Mined | Gold Mining Process | World Gold …

    Long before any gold can be extracted, significant exploration and development needs to take place, both to determine, as accurately as possible, the size of the deposit as well as how to extract and process the ore efficiently, safely and responsibly. On average, it takes between 10-20 years before a gold mine is even ready to produce material ...

  • Refining Gold | HowStuffWorks

    The final stage of gold production -- refining-- involves removing impurities that remain after the smelting process.Refining companies receive doré bars, as well as scrap gold, and reliquefy the metal in a furnace. Workers add borax and soda ash to the molten metal, which separates the pure gold from other precious and less precious metals.

  • Gold processing | Britannica

     · Gold processing, preparation of the ore for use in various products. For thousands of years the word gold has connoted something of beauty or value. These images are derived from two properties of gold, its colour and its chemical stability. The colour of gold is due

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