Download GTU BE/B.Tech 2019 Summer 5th Sem New 2152107 Extraction Of Non Ferrous Metals Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (NEW) EXAMINATION - SUMMER 2019

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Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

1. (a) Draw flow sheet of extraction of Aluminum . 03
   (b) Which reduction process is use for extraction of Al? Justify it. 04
   

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   (c) Explain Mitsubishi process for Copper production. 07
2. (a) Write ores/ minerals of Cu, Mg, Al with their chemical composition. 03
   (b) Which processes are used for treating low grade Al Ore? Explain any one. 04
   (c) Explain Single step and multistep continuous processes for copper extraction. 07

   OR

   (c) Discuss briefly Hall-Heroults process . 07

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3. (a) Explain synthetically Cryolites manufacturing. 03
   (b) Discuss in brief Cu- Cu2S phase diagram for Cu converting process. 04
   (c) Explain Hydrometallurgical process for production of primary copper 07

   OR

   (a) Draw flow sheet of precious metal recovery from anode slime. 03
   (b) Explain the Smelting process for production of zinc. 04
   

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   (c) Explain the pyro metallurgical process of nickel extraction from its sulphide ore. 07
4. (a) Explain the carbonyl process-for refining of nickel 03
   (b) “Gold extraction cyanidation process is used” Justify it. 04
   (c) How extraction of Tin is-done? Explain it with flow diagram. 07

   OR

   (a) Listout various applications of Tin. 03
   

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   (b) Explain parke’s process in brief. 04
   (c) Explain Pigeon process for extraction of Mg. 07
5. (a) Differentiate between reverberatory furnace smelting and rotary furnace smelting process for tin extraction. 03
   (b) List out ores/ minerals of Ag, Au, Pt, W with their chemical composition. 04
   (c) Explain hydro metallurgical extraction of zinc with flow sheet. 07

   OR

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   (a) Enlist properties and application of Magnesium. 03
   (b) Discuss about refining of Tin 04
   (c) Briefly explain Dow process. 07

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