Advertisements
Advertisements
प्रश्न
Explain the froth floatation method with a neat labelled diagram.
उत्तर
- The froth floatation process is based on two opposite properties of the particles, hydrophilic and hydrophobic.
- The metal sulphide particles are hydrophobic. Due to this property, they get wetted mainly with oil. On the other hand, gangue particles are hydrophilic and get wetted by water.
- In this method, the finely divided metal ore is added in a big tank containing large amount of water. To this, certain vegetable oil (pine oil, eucalyptus oil, etc.) is added for the formation of froth.
- In the tank, compressed air is circulated through the water. Bubbles are formed due to this blown air. A rotating agitator at the centre of the floatation tank agitates the mixture and draws air into it to form bubbles. As a result, foam is formed which carries metal sulphide particles. The foam rises to the surface of water and floats. Therefore, this method is called froth floatation process.
- This method is used to separate metal sulphide ores such as zinc blende (ZnS) and copper pyrite (CuFeS2).
Froth floatation method
APPEARS IN
संबंधित प्रश्न
Give the importance of the following for living beings:
Nitrogen
Give the importance of the following for living beings:
Hydrogen
Name:
(a) the processes involved in
concentration :-
Explain the following terms:
(a) flux
On which factors does the purification of metals depend?
Which metal is used for:
making face creams
Name a metal which forms a liquid alloy at ordinary temperature.
Complete the following flow chart and answer the questions below:
i) In which method pine oil is used?
ii) Explain what method of concentration in brief.
A compound that is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
Name the following:
Name an allotrope of a non-metal that allows electricity to pass through it.
Match the columns.
| Group A | Group B |
| 1. ZnS | a) Copper Sulphide |
| 2. HgS | b) Bauxite |
| c) Cinnabar | |
| d) Zinc blend |
Write the molecular formulae of the following compound.
Copper pyrite
Write the molecular formulae of the following compound.
Ferrous tungstate
Complete flow chart given below.
Observe the figure and name and explain in brief the following method:
Bassemerisation is used in the extraction of ______.
A process of extracting metals from aqueous solutions of their salts using suitable reducing agents is called ______
Explain the following term:
Metallurgy
After partial roasting, the sulphide of copper is reduced by ______.
Calcination is used in metallurgy for the removal of?
