gold cyanidation definition

  • Cyanide | Definition of Cyanide by Merriam-Webster

    Cyanide definition is - a compound of cyanogen with a more electropositive element or group: such as.

  • Analysis of Cyanide (Total, Weak Acid Dissociable, and ...

    In water, total cyanide includes the following dissolved species: free cyanide, weak metal cyanide complexes and strong metal cyanide complexes. However, it should be noted that some of the strong metal cyanide complexes, such as those of gold, cobalt and platinum, may not be .

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  • Gold Mining Process Development – Denver Mineral Engineers

    Cyanide leaching is the standard method used for recovering most of the gold throughout the world today. The process originated around 1890 and quickly replaced all competing technologies. The reason was strictly economical in nature. Where amalgamation plants could recover about 60% of the gold present, cyanide could recover about 90%.

  • Cyanide Chemistry - International Cyanide Management Code

    The process of extracting gold from ore with cyanide is called cyanidation. The reaction, known as Elsner's Equation, is: 4 Au + 8 CN-+ O 2 + 2 H 2 O = 4 Au(CN) 2-+ 4 OH-Although the affinity of cyanide for gold is such that it is extracted preferentially, cyanide will also form complexes with other metals from the ore, including copper, iron ...

  • Gold cyanide (Au(CN)) | AuCNm.nih.gov

    Use of the information, documents and data from the ECHA website is subject to the terms and conditions of this Legal Notice, and subject to other binding limitations provided for under applicable law, the information, documents and data made available on the ECHA website may be reproduced, distributed and/or used, totally or in part, for non-commercial purposes provided that ECHA is ...

  • The Chemistry of the Extraction of Gold - SAIMM

    The Chemistry of the Extraction of Gold M.J. Nicol, C.A. Fleming and R.L. Paul 1S.1 General Principles 15.1.1 The chemistry of gold compounds Gold is the most noble of all the metals and this .is the key to both its eternal romance and its many practical uses in industry. It is the only metal, for

  • CDC | Facts About Cyanide

    In manufacturing, cyanide is used to make paper, textiles, and plastics. It is present in the chemicals used to develop photographs. Cyanide salts are used in metallurgy for electroplating, metal cleaning, and removing gold from its ore. Cyanide gas is used to exterminate pests and vermin in ships and buildings.

  • Cyanidation - definition of cyanidation by The Free Dictionary

    Define cyanidation. cyanidation synonyms, cyanidation pronunciation, cyanidation translation, English dictionary definition of cyanidation. n. also cy·a·nid The anionic univalent CN group, or any of various salts or esters of hydrogen cyanide containing a CN group, especially the extremely...

  • Vat leaching | industrial process | Britannica

    Other articles where Vat leaching is discussed: gold processing: Cyanidation: .ore), cyanidation is accomplished by vat leaching, which involves holding a slurry of ore and solvent for several hours in large tanks equipped with agitators. For extracting gold from low-grade ores, heap leaching is practiced. The huge heaps described above are sprayed with a dilute solution of sodium cyanide ...

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  • What is Gold? - Definition, Properties & Uses - Video ...

    Definition of Gold. Gold is shiny. Gold is glamorous. Gold is the subject of many bank heists in movies. Gold, in sum, is considered one of the most precious metals in all the world.

  • Gold cyanidation : definition of Gold cyanidation and ...

    Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) is a metallurgical technique for extracting gold from low-grade ore by converting the gold to a water soluble coordination complex.It is the most commonly used process for gold extraction. [1] Production of reagents for mineral processing to recover gold, copper, zinc and silver represents approximately .

  • Gold cyanidation in Romania - Wikipedia

    Gold cyanidation in Romania was used for decades, but the process came into debate following the 2000 Baia Mare cyanide spill and proposal of the Roșia Montană Project, which would create the largest operation for gold extraction using cyanides in Europe.

  • Gold cyanidation - definition of Gold cyanidation by The ...

    Gold cyanidation synonyms, Gold cyanidation pronunciation, Gold cyanidation translation, English dictionary definition of Gold cyanidation. n. A process of extracting gold or silver from ores by treating them with a solution of sodium cyanide or calcium cyanide. n a process for recovering gold...

  • Cyanide Leaching Chemistry & Gold Cyanidation

    The reactions that take place during the dissolution of gold in cyanide solutions under normal conditions have been fairly definitely established. Most agree that the overall cyanide equation for leaching and cyanidation of gold is as follows: 4 Au + 8 NaCN + O2 + 2 H20 = 4 NaAu(CN)2 + 4 NaOH

  • Biooxidation - BioMineWiki

    The sulphide matrix (arsenopyrite), hosting inclusions of elemental gold particles, is biooxidated. The matrix surrounding the elemental gold will hence loosen up and partly disintegrate, thereby exposing the gold particles so that they are more accessible to subsequent treatment (usually cyanidation). Biooxidation decreases cyanide consumption

  • Cyanide Process | Definition of Cyanide Process by Merriam ...

    Cyanide process definition is - a method of extracting gold and silver from ores by treatment with a dilute solution of sodium cyanide or calcium cyanide, the dissolved metal being afterwards precipitated from the solution and cast into ingots.

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  • Cyanide Leaching Of Gold

    Gold Cyanide Solution (Leaching Gold With Cyanide) Since the 1890's, cyanide has been used to recover gold from gold bearing ores. And today, over 115 years later, most of the worlds gold is recovered with cyanide playing a large part in the beneficiation of the yellow precious metal.

  • The process design of gold leaching and carbon-in-pulp ...

    refractory gold is readily accessible for cyanide leaching. There are several variations of comminution circuits used in the gold industry, such as: Multi-stage crushing and pebble and/or ball milling circuits, typical of older installations. The process design of gold leaching and carbon-in-pulp .

  • What is Gold? - Definition, Properties & Uses - Video ...

    Definition of Gold. Gold is shiny. Gold is glamorous. Gold is the subject of many bank heists in movies. Gold, in sum, is considered one of the most precious metals in all the world.

  • Definitions | International Cyanide Management Code (ICMI ...

    Cyanidation - The process of extracting gold and silver from ore with cyanide. Cyanide - Technically, a singularly charged anion consisting of one carbon atom and one nitrogen atom joined with a triple bond, CN-. However, the term cyanide is used generically throughout the Cyanide Code and Cyanide Code documents to refer to the cyanide ion ...

  • CYANIDE | meaning in the Cambridge English Dictionary

    cyanide definition: 1. an extremely powerful poison that can kill people 2. an extremely powerful poison. Learn more.

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  • The leaching and adsorption behaviour of gold ores

    THE LEACHING AND ADSORPTION BEHAVIOUR OF GOLD ORES Kevin Lee Rees ... 2.2.1 Chemistry of gold cyanidation 13 ... 2.3.2 Refractoriness 24 2.3.2.1 Definition ofrefractoriness 24 2.3 .2.2 Causes and treatment of refractoriness 25 2.4 THE EFFECT OF METAL-CYANIDE SPECIES ON GOLD EXTRACTION 27 viii .