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JNTU 2007-08 II Year II Sem B.Tech.Met.E.- Mineral Dressing
Posted Date: 22 Dec 2007 Resource Type: Articles/Knowledge Sharing Category: Syllabus
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Posted By: India Member Level: Diamond
Rating:  Points: 1
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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY
HYDERABAD
II Year B.Tech. Met.E. II-Sem T P C
4+1* 0 4
MINERAL DRESSING
UNIT – I
Scope and objectives of ore dressing. Sampling of ores by different methods. Theory of liberation of minerals. Crushers: -Jaw, Gyratory, Cone, Rollsand toothed roll crushers.
UNIT – II
Types of grinding operations like batch and continous dry and wet grinding, open circuit and closed circuit grinding. Girnding Mills: Ball mills, theory of ball mill operation, rod and tube mills. Comminution laws: - Rittinger’s laws, Kick’s law and Bond’s law.
UNIT – III
Sizing: Study of laboratory sizing techniques and reporting of sizing data. Industrial sizing units: Types of screen surfaces. Grizzlies, trammels, vibrating and shaking screens. Movement of solids in fluids: stokes and Newton’s laws. Terminal velocity and its relation with size. Relation between time and velocity. Relation between distance traveled and velocity. Equal settling ratio,Free and hindered settling ratios. Quantifying concentrating operations: Ratio of concentration, recovery, selectivity index and economic recovery.
UNIT –IV
Classification of classifiers, study of settling cones, rake classifier, spiral classifier and cyclones.
UNIT –V
Heavy media separation: Principles, flow chart, different media used. Heavy media separation using heavy liquids and heavy suspensions. Washability curves for easy, normal and difficult coal.
UNIT –VI
Jigging: Theory of jigging. jigging machines:hand jig,harz jig,denner jig,baum jig,hancock jig,james coal jig
and halkyln jig.Design considerations ina jig. Tabling:-study of stratification on a table.shaking tables,wilfley table.humphrey’s spiral classifier.
UNIT –VII
Floatation: Principles of floatation.Factors affecting floatation.Classification of collectors and frothers.Regulators factors affecting their efficiency. Floatation machines: -Pneumatic and mechanical floatation cells.Application of floatation process for Cu,Pb and Zn ores.
UNIT –VIII
Magnetic separation processes and electrostatic separation process.
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Responses
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| Author: India 22 Dec 2007 | Member Level: Diamond Points : 3 | TEXT BOOKS:
1. Principles of Mineral Dressing by A.M. Gaudin.
REFERENCES:
1. Elements of Ore Dressing by A.F. Taggart
2. Mineral processing technology-.A. Wills
3. Ore dressing practies-S.K.Jain.
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