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Copper matte is charged into a silica li...

Copper matte is charged into a silica lined converter in extraction of copper. What is the role of silica lining here?

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Copper matte contains `Cu_2S` and `FeO`. It is put into a silica lined Bessemer converter. On blowing hot air, FeS is oxidised to FeO which is removed as slag by combining with silica.
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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
  1. At a site, low grade copper ores are available and zinc and iron scrap...

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  2. Why is electrolytic reduction preferred over chemical reduction for th...

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  3. Copper matte is charged into a silica lined converter in extraction of...

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  4. What is the role of collectors in froth floatation process ?

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  5. On what principle is chromatography based ?

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  6. What is the role of cryolite in the extraction of pure aluminium from ...

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  7. What is meant by the term native state?

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  8. When an element is found to occur in the native state?

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  9. What type of elements are found to occur in the combined state?

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  10. What is a mineral?

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  11. What is an ore?

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  12. Comment on the statement that all ores are minerals but all the minera...

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  13. What do you mean by gangue or matrix ?

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  14. What is the difference between a rock and a mineral ?

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  15. What type of ores can be concentrated by magnetic separation method ?

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  16. Define the term metallurgy.

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  17. Which metals are expected to occur in the native state?

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  18. List three main steps in the extraction of a metal from its ores.

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  19. What is ore dressing?

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  20. Which ores are concentrated by levigation washing ?

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