JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year 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 the associated gangue minerals, thereby increasing the concentration of the desired valuable mineral. It involves physical or chemical separation techniques to produce a high-grade product, known as a concentrate, and a waste product, known as tailings.
What is primary crushing?
Answer
Primary crushing is the initial stage of size reduction in a mineral processing circuit, where run-of-mine ore is reduced from large, irregular boulders (often up to 1.5 meters in size) to a more manageable, smaller product size, typically ranging from 100 mm to 250 mm. This process is designed to handle high throughputs and is performed using heavy-duty equipment such as jaw crushers or gyratory crushers. The primary objective is to prepare the material for secondary crushing or grinding stages by ensuring the feed size is compatible with downstream equipment.
What are the major modes of operations of a vibrating screen?
Answer
Sign in to view the complete answer paper.
Give classification and applications of gravity stamps.
Answer
Sign in to view the complete answer paper.
Write a brief note on mechanical classifiers.
Answer
Sign in to view the complete answer paper.
What is meant by dense media separation?
Answer
Sign in to view the complete answer paper.
Name the Electrical Methods of Concentration.
Answer
Sign in to view the complete answer paper.
Write a brief note on Electrostatic separator.
Answer
Sign in to view the complete answer paper.
Define magnetic method of separation.
Answer
Sign in to view the complete answer paper.
What is Enrichment ratio?
Answer
Sign in to view the complete answer paper.
Part B
Discuss the scope, objectives and economics of mineral processing also state its advantages.
Answer
Sign in to view the complete answer paper.
Explain the operation included in mineral processing for ROM.
Answer
Sign in to view the complete answer paper.
Differentiate between the crushing and grinding.
Answer
Sign in to view the complete answer paper.
What is the mineral processing? Explain the economic justification of mineral processing.
Answer
Sign in to view the complete answer paper.
Describe in detail ball mills, rod mills and tube mills.
Answer
Sign in to view the complete answer paper.
Discuss in detail the theory of ball mill operation.
Answer
Sign in to view the complete answer paper.
Draw well labeled diagrams of jaw and gyratory crushers.
Answer
Sign in to view the complete answer paper.
Discuss coal washing method by flowsheet under beneficiation of coal.
Answer
Sign in to view the complete answer paper.
Describe the construction and operation of hydro cyclone.
Answer
Sign in to view the complete answer paper.
Write short notes on the following: Fixed screen plunger jigs (harz jig), vibrating screens, screening efficiency.
Answer
Sign in to view the complete answer paper.
Discuss the principles of gravity concentrations.
Answer
Sign in to view the complete answer paper.
Explain the working of jigging cycle briefly.
Answer
Sign in to view the complete answer paper.
Describe the method of Floatation in mineral processing plant.
Answer
Sign in to view the complete answer paper.
What are the design principles of magnetic separators?
Answer
Sign in to view the complete answer paper.
Discuss the Physico-chemical properties of minerals.
Answer
Sign in to view the complete answer paper.
Explain the method of coal washing in detail.
Answer
Sign in to view the complete answer paper.
Describe the typical beach-sand treatment using a flowsheet.
Answer
Sign in to view the complete answer paper.
Draw a flow sheet diagram for coal and explain how coal can be processed in coal screening plant.
Answer
Sign in to view the complete answer paper.
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.
Answer
Sign in to view the complete answer paper.