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प्रश्न
What is the role of flux in metallurgical processes?
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उत्तर
The ores, even after concentration, contain some gangue. To remove gangue, certain substances are mixed with concentrated ore which combine with the gangue to form a fusible material which is not soluble in molten metal. The substances used are called fluxes.
Fluxes are classified as:
(i) Acidic flux and
(ii) Basic flux. Acidic flux removes basic impurities while basic flux removes acidic impurities.
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संबंधित प्रश्न
Select the process from the following which matches the given description.
(calcination, roasting, pulverisation, smelting)
Crushing of the ore into a fine powder.
Also give the names of their repective ores ?
Why does iron or zinc not occur free in nature?
Which impurities are present in bauxite?
How does aluminum react with the Air ?
Explain the following term:
Ores
Complete the statement using every given option.
During the extraction of aluminium..............
Ingredients and gangue in bauxite.
Complete the statement using every given option.
During the extraction of aluminium..............
Chemical reaction of transformation of bauxite into alumina by Hall’s process.
Complete the statement using every given option.
During the extraction of aluminium.........
Heating the aluminium ore with concentrated caustic soda.
Name the following:
Two metals which occur in nature in free state as well as in combined state.
Define the term : Mineral
Name one metal occurring as a : Sulphide ore
Complete and balance the following equation:
Al + KOH + H2O →
Name a metal which occurs free in nature.
Give the name and formula of an ore of zinc.
What in addition to a zinc compound, is put into the furnace? State one large scale use of zinc.
Name an alloy of zinc which is used in simple voltaic cells.
What is added to steel to make it stainless steel?
In the Wilfley table method, the particles of gangue are separated by __________ separation method.
Cassiterite is an are of:-
