Question

what is Matllurgy???? ​

Answer 1

Answer:

Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are called alloys. Metallurgy encompasses both the science and the technology of metals.

Answer 2

Metallurgy :

• Extraction of metals from thier ores obtained in nature is known as metallurgy.
• The elements or compounds of the metals which occur in nature in the earth crust are called minerals.
• The minerals from which the metals are extracted without economical loss are called ores.

Extraction of metals from thier ores :

It involves in three stages.

1. Concentration or dressing of ore
2. Extraction of crude metal
3. Refining or purification of metal

1. Concentration of ore :

• It is also known as dressing /enrichment of ore.
• It means getting rid of as much of the unwanted rocky material as possible from the ore.
• This impurities like sand and clay are called gangue.
• This can be done by different methods like hand picking, washing, forth flotation and magnetic separation.

2. Extraction of crude metal :

• Extraction of metal from its ores depends on the reactivity of the metal.
• Highly reactive metals like K, Na, Ca, Mg, etc. can be extracted by electrolysis of their aqueous solution.
• Medium reactive metals like Zn, Cu, Fe, etc. can be extracted by few methods like roasting and calcination.
• Least reactive metals like Hg and Ag are often found in free State.

3. Purification of metal :

• The process of obtaining the pure metal from the impure metal is called refining of the metal.
• It involves several types of processes like distillation, poling, liquation, electrolytic refining, etc.