JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III MINERAL PROCESS ENGINEERING Previous Question Paper (February - 2023 - R16)
Note: i) Question paper consists of Part A, Part B.
ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions.
iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Define beneficiation.
Answer
Beneficiation is the process of improving the economic value of an ore by removing gangue minerals, which results in a higher grade product (concentrate) and a waste product (tailings).
What is primary crushing?
Answer
Primary crushing is the first stage of size reduction in a mineral processing plant. It involves breaking run-of-mine ore from the mine, which may be as large as 1.5 meters, down to a manageable size of 100 to 200 mm, typically using jaw or gyratory crushers.
What are the major modes of operations of a vibrating screen?
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Give classification and applications of gravity stamps.
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Write a brief note on mechanical classifiers.
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What is meant by dense media separation?
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Name the Electrical Methods of Concentration.
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Write a brief note on Electrostatic separator.
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Define magnetic method of separation.
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What is Enrichment ratio?
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Part B
Discuss the scope, objectives and economics of mineral processing also state its advantages.
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Explain the operation included in mineral processing for ROM.
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Differentiate between the crushing and grinding.
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What is the mineral processing? Explain the economic justification of mineral processing.
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Describe in detail ball mills, rod mills and tube mills.
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Discuss in detail the theory of ball mill operation.
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Draw well labeled diagrams of jaw and gyratory crushers.
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Discuss coal washing method by flowsheet under beneficiation of coal.
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Describe the construction and operation of hydro cyclone.
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Write short notes on the following: Fixed screen plunger jigs (harz jig), vibrating screens, screening efficiency.
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Discuss the principles of gravity concentrations.
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Explain the working of jigging cycle briefly.
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Describe the method of Floatation in mineral processing plant.
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What are the design principles of magnetic separators?
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Discuss the Physico-chemical properties of minerals.
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Explain the method of coal washing in detail.
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Describe the typical beach-sand treatment using a flowsheet.
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Draw a flow sheet diagram for coal and explain how coal can be processed in coal screening plant.
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How minerals can be classified based on magnetic field? Explain the process of separation of magnetic minerals from its non-magnetic minerals with a neat sketch.
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