elsner equation

Elsner’s equation is generally accepted as expressing the action of gold in dilute cyanide solutions; 4 Au + 8 KCN + O2 + 2 H2O = 4 KAu (CN)2+ 4 KOH. Thus, when fresh surfaces of gold are exposed to the action of cyanide in an aqueous solution containing free oxygen, a gold cyanide compound will be formed and a hydroxide (alkaline)

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tubular reactor- resources gold technology

tubular reactor- resources gold technology

4 Au + 8 NaCN + O2 + 2 H2O → 4 Na [Au (CN)2] + 4 NaOH. Elsner Equation. The tubular reactor is fed with gold ore slurry, flotation concentrate or refractory gold ore via a high pressure slurry pump. A heat exchanger is used to start and maintain the thermal reaction within the pipe reactor

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aachen reactors - application 1. cyanide leachingof gold

aachen reactors - application 1. cyanide leachingof gold

A generally accepted mechanism is described by the Elsner equation. 4Au + 8NaCN + O 2 + 2H 2 O = 4NaAu (CN) 2 + 4NaOH. Elsner’s Equation shows oxygen as a requirement for the gold leach reaction – how much is still under debate. The above equation shows a cyanide to oxygen ratio of 8:1. Habashi et al propose a CN:O2 ratio of 6:1, eg. If the cyanide concentration is 150ppm, then the corresponding DO …

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intensivecyanidation- resources gold technology

intensivecyanidation- resources gold technology

Elsner Equation The Resources Intensive Cyanidation Reactor operates on a cyclic basis utilizing three tanks sequentially for filling and chemical dosing, followed by reaction time and discharge. Each of the tanks sequentially rotates in their function

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aachen reactors for mass transfer|maelgwyn mineral services

aachen reactors for mass transfer|maelgwyn mineral services

A generally accepted mechanism is described by the Elsner equation. 4Au + 8NaCN + O 2 + 2H 2 O = 4NaAu (CN) 2 + 4NaOH. Elsner’s Equation shows oxygen as a requirement for the gold leach reaction – how much is still under debate. The above equation shows a cyanide to oxygen ratio of 8:1. Habashi et al propose a CN:O2 ratio of 6:1, eg. If the cyanide concentration is 150ppm, then the corresponding DO …

Learn More
elsner equation on gold leaching

elsner equation on gold leaching

Elsners equation is generally accepted as expressing the action of gold in dilute cyanide solutions 4 Au 8 KCN O2 2 H2O 4 KAu CN2 4 KOH. Thus when fresh surfaces of gold are exposed to the action of cyanide in an aqueous solution containing free oxygen a gold cyanide compound will …

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معادله واکنش انحلال طلا به «معادله اسنر» (Elsner Equation) معروف است که به صورت زیر نوشته می‌شود: 4Au(s)+8N aCN (aq)+O2(g)+2H2O(l) →4N a[Au(CN)2](aq)+4N aOH(aq) 4 A u (s) + 8 N a C N (a q) + O 2 (g) + 2 H 2 O (l) → 4 N a [ A u (C N) 2] (a q) + 4 N a O H (a q)

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elsner reaction | chemistry | britannica

elsner reaction | chemistry | britannica

Alternative Title: Elsner equation. Learn about this topic in these articles: gold extraction and processing. In gold processing: Cyanidation …hydroxide, according to the so-called Elsner reaction: Read More;

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cyanide chemistry | international cyanide management code

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 and zinc

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intensive cyanidation - resources gold technology

intensive cyanidation - resources gold technology

Elsner Equation The Resources Intensive Cyanidation Reactor operates on a cyclic basis utilizing three tanks sequentially for filling and chemical dosing, followed by reaction time and discharge. Each of the tanks sequentially rotates in their function

Learn More
aachen reactors - application 1. cyanide leaching of gold

aachen reactors - application 1. cyanide leaching of gold

A generally accepted mechanism is described by the Elsner equation. 4Au + 8NaCN + O 2 + 2H 2 O = 4NaAu (CN) 2 + 4NaOH. Elsner’s Equation shows oxygen as a requirement for the gold leach reaction – how much is still under debate. The above equation shows a cyanide to oxygen ratio of 8:1. Habashi et al propose a CN:O2 ratio of 6:1, eg. If the cyanide concentration is 150ppm, then the corresponding DO …

Learn More
tubular reactor - resources gold technology

tubular reactor - resources gold technology

4 Au + 8 NaCN + O2 + 2 H2O → 4 Na [Au (CN)2] + 4 NaOH. Elsner Equation. The tubular reactor is fed with gold ore slurry, flotation concentrate or refractory gold ore via a high pressure slurry pump. A heat exchanger is used to start and maintain the thermal reaction within the pipe reactor

Learn More
elsner equation on gold leaching - unityone

elsner equation on gold leaching - unityone

Elsner’s equation is generally accepted as expressing the action of gold in dilute cyanide solutions; 4 Au + 8 KCN + O2 + 2 H2O = 4 KAu (CN)2+ 4 KOH. Thus, when fresh surfaces of gold are exposed to the action of cyanide in an aqueous solution containing free oxygen, a gold cyanide compound will be formed and a hydroxide (alkaline)

Learn More
elsner equationon gold leaching

elsner equationon gold leaching

Jun 12, 2015 · The chemical reaction for the dissolution of gold, the Elsner Equation, follows 4 Au 8 NaCN O2 2 H2O → 4 Na 4 NaOH In this redox process, oxygen removes, via a two step reaction, one electron from each gold atom to form the complex Au(CN)2- ion Application The ore is comminuted using grinding machinery. Get Price

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themetallurgy of cyanide gold leaching an introduction

themetallurgy of cyanide gold leaching an introduction

Oct 20, 2014 · A paper published by L. Elsner in 1846 first correctly identified the chemical reaction that forms the basis of all gold cyanide leaching processes: 4 Au + 8 NaCN + O 2 + 2 H 2 O → 4 Na[Au(CN) 2] + 4 NaOH. The equation is well known, but the successful application of this reaction in a gold mining operation is rarely straightforward

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