III B.Tech II Semester Supplementary Examinations, Apr/May 2006 IRON PRODUCTION (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Explain the Dwight Lloyd sintering machine in the modern Iron making. [8] (b) What are the parameters, which affect the efficiency of sintering machines? Explain [8] 2. (a) Mention all the parts of a blast furnace. Explain any one of them.
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(b) What are the chief causes of blast furnace refractory failure? Explain. 3. (a) Explain the construction of a blast furnace stove with its accessories. (b) What are the benefits of cleaning of blast furnace gas?
[9]
[7]
[7] [4]
(c) What are the advantages and disadvantages of hoisting appliances of a blast furnace? [5] 4. (a) Comment on the reactions in hearth region of a blast furnace.
[6]
(b) Write short notes on the following:
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i. Sulphur reaction in blast furnace ii. Alumina problem in blast furnace
5. (a) What are the basic functions of the slag in a modern blast furnace?
[5] [5] [6]
(b) What are the various constituents of blast furnace slags?
[3]
(c) What are the effects of CaO, SiO2 , AlO3 &MgO on fluidity of slags?
[7]
6. (a) What are the precautions to be taken for a newly lined blast furnace?
[7]
(b) Describe the process of ‘Banking’ in blast furnace.
[9]
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7. (a) What are the latest developments in Bell construction and operation in the modern blast furnace? Describe them [8] (b) What are the advantages of ‘Higher blast temperature’ in blast furnace? [4]
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(c) What is the importance of oxygen enrichment of blast in the blast furnace?[4]
8. (a) Describe the HyL process of sponge Iron production.
[6]
(b) Explain the advantages and disadvantages of HyL process of sponge Iron production [5] (c) Explain the future of DR technology of Iron making. ?????
NR321804 III B.Tech II Semester Supplementary Examinations, Apr ...
8. (a) Describe the HyL process of sponge Iron production. [6] · (b) Explain the advantages and disadvantages of HyL process of sponge Iron pro- · duction.
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