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Explain the terms gangue and slag....

Explain the terms gangue and slag.

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Gangue : The ore is contaminated with the minerals of earth crust and undesired chemical compounds. These are known as gangue (or) matrix.
Slag :The fused material obtained during the refining (or) smelting of metals by combining the flux with gangue is called slag.
Eg :`underset("gangue")(FeO)+underset("flux")(SiO_(2))rarrunderset("Slag")(FeSiO_(3))`
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-GENERAL PRINCIPLES OF MMETALLURGY-VERY SHORT ANSWER QUESTIONS
  1. Decribe a method for the refining of nickel.

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  2. How is cast iron different from pig iron?

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

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

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

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

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

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

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  9. Explain the terms gangue and slag.

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

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  11. What are the limitations of Ellingham diagram?

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

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  13. What is matte? Give its Composition.

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

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  15. Explain magnetic separation of impurities from an ore.

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  16. What is flux ? Give an example.

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  17. Give two uses each of the following metals: (a) Zinc (b) copper...

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  18. Between C and CO, Which is a better reducing agent for ZnO?

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  19. Give the uses of a) cast iron b) wrought iron c) Nickel steel ...

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  20. How is aluminium useful in the extraction of chromium and mangannese f...

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