Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 3132103 Mineral Processing Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132103 Date: 28/11/2019
Subject Name: Mineral Processing
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Discuss various sources of metals. 03
(b) List out Physical and chemical characteristics of magnetite and chalcopyrite
ore.
04
(c) Draw a flow chart showing principal steps in a mineral processing. Explain
each step. List merits of mineral processing.
07
Q.2 (a) Define Ore and Mineral, Concentrate. 03
(b) List out ores and Minerals for metal like Sn, Cu, Fe, Mg with their chemical
composition.
04
(c) Give classification of Crushers. Explain black Jaw Crusher With Neat Diagram. 07
OR
(c) A material is crushed in a black jaw crusher and the average size of particle
reduced from 6cm to 1.25cm with consumption of energy at the rate of 6hp
hr/tonne. What will be the consumption of energy needed to crush the same
material of average size 8cm to an average size of 2.5 cm? a) Assuming
Rittingers?s law applies.
07
Q.3 (a) Explain locking and unlocking of minerals and gangue. 03
(b) Define liberation, Comminution and sizing, mesh no. 04
(c) What is Grinding? Classify the various zones created in ball mill during
grinding operation.
07
OR
Q.3 (a) What do you understand by open ?open circuit? and ?closed circuit? grinding? 03
(b) If the coefficient of friction between rock and steel is 0.5, what is minimum
diameter of roll to reduce 4 cm pieces of rock to 1 cm.
04
(c) Short notes on Heavy media separation. 07
Q.4 (a) Discuss Thickening process briefly. 03
(b) Explain sieve analysis in brief. 04
(c) By which gravity separation process Coal washing is done? Explain with
diagram.
07
OR
Q.4 (a) Describe the working principle of concentration table with suitable diagram. 03
(b) What are the purpose of collectors, frothers and activators in flotation process? 04
(c) On what principle forth flotation works? Explain the process of forth flotation
with diagram.
07
Q.5 (a) What is role of Mineral processing in Extractive Metallurgy? Discuss. 03
(b) Draw simplified beneficiation flow sheets of Bituminous coal. 04
(c) Discuss about electrostatic separators. 07
OR
Q.5 (a) Classify different types of industrial screening. 03
(b) Draw beneficiation flow sheets of magnetite ore. 04
(c) Discuss briefly about Magnetic Separation 07
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This post was last modified on 20 February 2020