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What are the distinguishing features of each extraction process: pyrometallurgy, electrometallurgy, and hydrometallurgy? Explain briefly how the types of metallurgy are used in the production of(c) Au;

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shaikhmohd0119

1.Pyrometallurgy

  • This techniques involves the high temperature at which the Chemical reactions took place between the gases and solids.
  • Pyrometallurgy involves calcination, Roasting and smelting process.

2.Electrometallurgy

  • This technique involves the metallurgy operations that took place in electrolytic cell.
  • Electro- winning and Electro-refining are some of the electrometallurgy process

 3. Hydrometallurgy

  • Reactions involves aqueous solutions to extract metal, use this technique.
  • Hydrometallurgy involves precipitation , distillation , adsorption and solid extraction operations.

Now,

 Type of metallurgy are used in the production of Au is Leaching.

What is Leaching?

Leaching is the process of extracting a soluble constituent from a solid by means of a solvent.

  • Opening of ores, concentrates or metallurgical products to recover the metal values.
  • Leaching easily soluble constituents (usually gangue minerals) in an ore or concentrate in order to have it in a more concentrated form, e.g. leaching of tungsten flotation concentrate with hydrochloric acid to dissolve away calcite and apatite.

From the above conclusion we can say that, metallurgy are used in the production of Au is Leaching.

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