JNTU Non Ferrous Extractive Metallurgy Exam Paper Apr-May 2008

JNTU B.Tech II Semester Examinations, Non Ferrous Extractive Metallurgy  Apr/May 2008

(Metallurgy & Material Technology)

Time: 3 hours Max Marks: 80

Answer any FIVE Questions

All Questions carry equal marks

SET-IV

1. (a) Define and explain the terms smelting and roasting. Explain why smelting of roasted copper ore is done.

(b) Draw a neat sketch of reverberatory furnace? Describe the various parts in it.

Explain the working of the furnace for smelting operations. [6+10]

 

2. (a) Bring out the differences between Zinc and iron blast furnaces.

(b) Name some non-ferrous metals whose ores are available in the form of sulphides give their sulphide ores and give therir chemical formulae. [10+6]

 

3. (a) What are the important uses of lead metal?

(b) Give the chemical formulae of the following minerals of lead:

i. Galena

ii. Cerrusite

iii. Anglestie.

(c) What are the various impurities with which lead ores are associated?

(d) Give the important locations, where lead are available. [5+4+4+3]

 

4. (a) With the help of a flow sheet, explain the production of aluminium from high silica bauxites.

(b) What is the predicted consumption of aluminium in India? What is the installed capacity of a aluminium in India? Why the full capacity production of aluminium is not possible in india? Explain. [12+4]

 

5. (a) Explain the effect of viscosity and surface tension of the electrolyte on the Electrolysis of magnesium.

(b) Draw an electrolytic cell and explain the construction. [8+8]

 

6. (a) What are the uses of titanium and titanium dioxide? What are the sources of Titanium?

(b) Write down a flow sheet for the extraction of Ti. [8+8]

 

7. (a) What are the primary and secondary sources of uranium?

(b) Explain the chemistry of alkali leaching of uranium concentrates.

(c) What are the advantages of alkali leaching over acid leaching? [4+6+6]

 

8. (a) With help of a flow sheet explain the flotation of converter Cu- Ni matte.

(b) Give a flow sheet for the extraction of Nickel from oxide ores. [8+8]

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