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Question
Write the principles of the following methods :
Froth floatation method
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Solution
Froth Floatation Method: This method is based on the principle that the ore particles are wetted by oil, whereas gangue particles are wetted by water. This method is used for the concentration of sulphide ores.
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RELATED QUESTIONS
What is the role of depressant in froth floatation process?
Which process is usually applied for separating gangue from sulphide ores?
Which of the following statements is correct about the role of substances added in the froth floation process?
(i) Collectors enhance the non-wettability of the mineral particles.
(ii) Collectors enhance the wettability of gangue particles.
(iii) By using depressants in the process two sulphide ores can be separated.
(iv) Froth stabilisers decrease wettability of gangue.
In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by:
(i) using collectors.
(ii) adjusting the proportion of oil to water.
(iii) using depressant.
(iv) using froth stabilisers.
Which of the following ores are concentrated by froth floation?
(i) Haematite
(ii) Galena
(iii) Copper pyrites
(iv) Magnetite
How do we separate two sulphide ores by Froth Floatation Method? Explain with an example.
Match items of Column I with the items of Column II and assign the correct code:
| Column I | Column II |
| (A) Cyanide process | (1) Ultrapure \[\ce{Ge}\] |
| (B) Froth Floatation Process | (2) Dressing of \[\ce{ZnS}\] |
| (C) Electrolytic reduction | (3) Extraction of \[\ce{Al}\] |
| (D) Zone refining | (4) Extraction of \[\ce{Au}\] |
| (5) Purification of \[\ce{Ni}\] |
Match items of Column I with the items of Column II and assign the correct code:
| Column I | Column II |
| (A) Sapphire | (1) \[\ce{Al2O3}\] |
| (B) Sphalerit | (2) \[\ce{NaCN}\] |
| (C) Depressan | (3) \[\ce{Co}\] |
| (D) Corundum | (4) \[\ce{ZnS}\] |
| (5) \[\ce{Fe2O3}\] |
Assertion: Sulphide ores are concentrated by Froth Flotation method.
Reason: Cresols stabilise the froth in Froth Flotation method.
The oil used as frothing agent in froth flotation process is ______.
