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What is the role of depressant in froth ...

What is the role of depressant in froth floatation?

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By using depressants in froth floatation process , it is possible to separate a mixture of two suplhide ores.
Eg : In the ore containing ZnS and PbS , the depressant used is NaCN . It prevents ZnS from coming to the froth but allows PbS to come with the froth.
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-GENERAL PRINCIPLES OF MMETALLURGY-VERY SHORT ANSWER QUESTIONS
  1. What is the role of depressant in froth floatation?

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  2. Between C and CO, which is a better reducing agent at 673K.

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  3. Name the common elements present in the anode mud in the eletrolytic r...

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  4. State the role of silica in the metallurgy of copper.

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  5. Explain "Poling".

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  6. Decribe a method for the refining of nickel.

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  7. How is cast iron different from pig iron?

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  8. What is the difference between a mineral and an ore?

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  9. Why copper matte is put in silica lined converter?

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  10. What is the role of cryolite in the metallurgy of aluminium?

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  11. How is leaching carried out in the case of low grade copper ores?

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  12. Why is zinc not extracted from zinc oxide through reduction using CO?

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  13. Give the composition of the following alloys. (a) Brass (b)Bronze ...

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  14. Explain the terms gangue and slag.

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  15. How is Ag or Au obtained by leaching from the respective ores?

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  16. What are the limitations of Ellingham diagram?

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  17. Write any two ores with formulae of the following metals: (a) Alumin...

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  18. What is matte? Give its Composition.

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  19. What is blister copper? Why is it so called?

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  20. Explain magnetic separation of impurities from an ore.

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