JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III MINERAL PROCESSING Previous Question Paper (February - 2023 - R18)
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
Write the flowsheet for the process utilizing two-stage separation.
Answer
A two-stage separation flowsheet typically involves: Feed → Primary Separation → (Concentrate 1 + Tailings 1). The Tailings 1 are then sent to Secondary Separation → (Concentrate 2 + Final Tailings). The final product is the combined Concentrate 1 and Concentrate 2.
Describe the separation efficiency.
Answer
Separation efficiency measures how effectively a process distinguishes between valuable minerals and gangue. It is defined as the ratio of the actual recovery of the valuable mineral to the theoretical maximum recovery possible for a given grade of concentrate. It accounts for both the recovery of the valuable component and the rejection of the gangue material.
What is Selectivity Index?
Answer
Sign in to view the complete answer paper.
What is Sieving? What are the factors affecting the screening efficiency?
Answer
Sign in to view the complete answer paper.
Describe about Wemco cone separator.
Answer
Sign in to view the complete answer paper.
What is probable error of separation or the Ecart probable?
Answer
Sign in to view the complete answer paper.
What are the factor which affect the operation of the shaking concentrator?
Answer
Sign in to view the complete answer paper.
Describe about Hand Jig.
Answer
Sign in to view the complete answer paper.
What is the importance of flotation reagents?
Answer
Sign in to view the complete answer paper.
Describe the factors affecting the flotation efficiency.
Answer
Sign in to view the complete answer paper.
Part B
What are the important features of double-toggle blake crushers?
Answer
Sign in to view the complete answer paper.
Draw and explain the typical flow sheet for a crushing plant producing ball mill feed.
Answer
Sign in to view the complete answer paper.
Explain the Jaw-crusher construction.
Answer
Sign in to view the complete answer paper.
Discuss about the principles of comminution.
Answer
Sign in to view the complete answer paper.
What are the different types of industrial screens?
Answer
Sign in to view the complete answer paper.
Explain Grizzley and Banana Screens.
Answer
Sign in to view the complete answer paper.
Derive the Newton's law for turbulent resistance.
Answer
Sign in to view the complete answer paper.
Write short notes on free and hindered settling ratios.
Answer
Sign in to view the complete answer paper.
Explain the applicability, construction and operation of Tri-Flo separators.
Answer
Sign in to view the complete answer paper.
Discuss about the Laboratory Heavy Liquid Tests along with the coal washability curves.
Answer
Sign in to view the complete answer paper.
What are the features of Reichert Cone?
Answer
Sign in to view the complete answer paper.
Explain about Reichert Cone.
Answer
Sign in to view the complete answer paper.
Explain the design considerations in a jig.
Answer
Sign in to view the complete answer paper.
Explain about the study of stratification on a table.
Answer
Sign in to view the complete answer paper.
Write short notes on Classification of Collectors, Frothers and Regulators.
Answer
Sign in to view the complete answer paper.
Discuss about micro-flotation tests.
Answer
Sign in to view the complete answer paper.