Tag: production of metals

Metals can be recovered from their ores by following chemical methods:

(c) The ore is beneficial to us if it is handpicked then metal crushed and ground, and later subjected to pulverization as per the requirement
(e) Dressed ore is required for it to be concentrated.
(b) The ore should be converted to its oxide form.
(d) The ore in the form of oxide is required to be reduced.
(a) The metal obtained from its oxide require further purification for end use.

Melting is the process in which a substance changes from solid to liquid.

When a solid melts the temperature remains same until the whole solid melts.

The heat is used up in changing the state overcoming the forces of attraction.

The compounds of reactive metals from which metals extracted and purified are called ores of metals. Metals can be extracted from ore by reduction and electrolysis.

It is easier to obtain a metal from its oxide, as compared to its sulphides and carbonates. Therefore, prior to reduction, the metal sulphides and carbonates must be converted to metal oxides.

Ores contain large amount of impurities, which is called as gangue. The process of removing of impurities by physical means of methods like hand picking, crushing or pulverizing and grinding) is called dressing of ore.

Reduction is the process of removal of oxygen for extraction of metals from their oxide ores.

Electrolysis is the process of decomposition of a substance by passing electricity through it in a molten or dissolved state.