(vi) Complete the following flow chart and answer the sub-questions below:Concentration of oresGravitation based separationLeaching(a) In which method pine oil is used?(b) Explain that method of concentration in brief.
Answers
Answer:
a) Concentration of ores.
1) Gravitation based separation.
2) Leaching.
3) Froth floatation method.
4) Magnetic separation method.
b) In which method pine oil used?
Ans:- Froth floatation method.
c) Explain that method of concentration in brief.
Ans:- 1)The Froth Floatation method is a method used for the concentration of metal ores.
2) It is used for the concentration of sulphide ores.
3) In this method, water is added to powdered ore.
4) To this, substances called collectors (such as pine oil ) are added so that the ore particles can be separated from the gangue particles.
5)The ore particles become wet by oil while the gangue particles become wet by water.
6) Air is blown in through a pipe and a rotating paddle agitates this mixture.
7) This forms froth.
8) The froth, being lighter, carries with it the ore particles and is separated from gangue.
9) So, the ore particles float above water. The froth is then skimmed off, leaving behind the gangue.
10) It is dried and metal is thus obtained.
Explanation: