general method for refining refractory ore

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Recovery Refractory Resources SGS

Sep 1, 2012 ... Refractory gold ore needs pre treatment for cyanidation to ... process steps common to each method are crushing ... concentrate and all refinery processes downstream ..... company says that, in general, it has seen improved...

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Gold processing Britannica

By 3000 bc gold rings were used as a method of payment. ... With E.B. Miller's process of refining impure gold with chlorine gas (patented .... A large proportion of gold is recovered from refractory ores, and considerable skill is .... Encyclopædia Britannica articles are written in a neutral objective tone for a general audience.

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evaluating process options for treating some refractory ores abstract

options for treating more complex ore bodies as the less refractory ores become ... estimates for different methods of pretreatment were prepared and these ..... The 940 m3/hr Modular Merrill Crowe and refinery plant consists of the ... The general concept flow sheet for whole ore and concentrate is shown in Figure 6.

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What is the most environmentally friendly technique that can...

The method of roasting the sulphide tend to form gases that eventually form weak ... Arsenopyrite in highly refractory ores is finer grained, ... What few people realize is that the process of copper smelting plus electrolytic refinery .... The above is all very general because it is quite difficult to put all sulphide refractory ores into...

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US5792235A Method for recovering gold and other precious ...

A method for recovering precious metals from carbonaceous ore comprising leaching the ... Refractory ore resources can consist of ores, flotation concentrates, mill ... the ore, then preg robbing may be illustrated by the following general formula: ...... Riccardo Reverso Process for refining noble metals from auriferous mines.

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Gold extraction Wikipedia

Gold extraction refers to the processes required to extract gold from its ores. This may require a ... 7 Gold refining and parting; 8 See also; 9 References ... The method known as heap leaching was first proposed in 1969 by the United ... These refractory ores require pre treatment in order for cyanidation to be effective in...

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US20120304828A1 Process of leaching gold Google Patents

This invention provides a process of leaching gold that can be inexpensively and ... When the sulfur is recovered by the flotation method, gold also can be ..... cementation, electrolytic refining and the like, and thus, gold product can be obtained. .... Sa A method of recovering metal values from refractory sulphide ores and...

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PRODUCTION AND REFINING OF METALS Cooperative Patent ...

the production of metal by smelting, roasting or furnace method; the extraction of metal compounds from ore and concentrates by wet processes; electrochemical ... general process for refining or remelting metals; ..... Obtaining refractory metals.

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Outotec and sustainability

Refractory ore treatment with pressure oxidation (1985) .... activated carbon. Electrowinning. Smelting. Gold. Carbon. Refining. Tailings. 1 10 g/t. Solution ... New elution methods from .... General diagram for Outotec chloride leaching process.

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Refractory Gold Ore Treatment Methods 911 Metallurgist

Jan 11, 2018 ... Where gold is associated with arsenic, antimony, tellurium, and certain other minerals, it is often only partly soluble in cyanide solution.

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