Describe the role of (i) NaCN in the extraction of gold

selected May 1 2018 by Vikash Kumar. Best answer. (i) Role of NaCN in the extraction of gold is to do the leaching of gold ore in the presence of air from which the gold is obtained later by replacement. (ii) SiO 2 is added to copper matte to convert the leftout FeS FeO into slag.

Gold extraction Wikipedia


Gold cyanidation Wikipedia


Gold processing Britannica

Endogenetic gold ores include vein and lode deposits of elemental gold in quartzite or mixtures of quartzite and various iron sulfide minerals particularly pyrite (FeS 2) and pyrrhotite (Fe 1x S). When present in sulfide ore bodies the gold although still elemental in form is so finely disseminated that concentration by methods such as those applied to alluvial gold is impossible.

How is gold extracted from its ore? Quora

Extracting gold from ore is a poisonous business. The most common method is cyanide leaching where cyanide salts in solution are used to suck the gold out from its ore. You get gold but you also get highly toxic byproducts. 'Green' gold extraction method replaces cyanide with starch

Extraction of Gold

The ore is reduced to a fine state of division and amalgamated simultaneously in a stampmill the solid goldamalgam separated from the liquid mercury by filtration through leather under pressure and the mercury distilled. Complete extraction of the gold by amalgamation is impossible a part remaining in the mud of the stamp mills.

Gold Extraction Techniques Manhattan Gold Silver

But the most efficient method for gold extraction is froth flotation. Along with mechanized mining froth flotation allowed the best recovery of gold from much lower grade ore than before making it perhaps the most important mining industry innovation of the 20th century. All of these gold extraction techniques utilize complex chemical reactions to work but our infographic below should give you a

how do you balance the equation for gold extraction from

how do you balance the equation for gold extraction from gold ore Au+2NaCN+O2+H2O>NaAu(CN)2+3NaOH? I know the basics but I

What is Gold Extraction? (with pictures)

Gold extraction refers to the methods used to remove gold from its raw state in gold ore. A number of processes are employed to achieve extraction including separating the gold from its surroundings by physical force exposure to heat or chemical means. The ore is

Extracting Gold HowStuffWorks

Leaching dissolves the gold out of the ore using a chemical solvent. The most common solvent is cyanide which must be combined with oxygen in a process known as carboninpulp. As the cyanide and oxygen react chemically gold in the pulp dissolves. When workers introduce small carbon grains to the tank the gold adheres to the carbon.