Back close

Course Detail

Course Name Mechanical Operations
Course Code 15CHE203
Program B. Tech. in Chemical Engineering
Semester Three
Year Taught 2019


Unit 1

Properties and handling of particulate solids- characteristics of solid particles, standard screen series, mixed particle size and screen analysis; Screening: Theory of screening, Effectiveness and Capacity of screens, Screening equipment: stationary screens and grizzlies, gyrating screens, vibrating screens and other industrial screens like trammels, etc. Transportation and storage of solids: bins, hoppers and silos, flow out of bins; conveyor selection, different types of conveyers and their performance characteristics.

Comminution of solids (Size Reduction): Factors affecting comminution, comminution laws: Kick’s law, Rittinger’s law and Bond’s law and their limitations. Crushing efficiency & power consumption, Size reduction equipments: Primary crusher – Jaw crusher, Gyratory crusher, Secondary crusher – Roll crusher (both smooth roll & toothed roll) its selection and capacity, Grinder – Construction and operation of Hammermill, Ball mill, Rod mill, Attrition mill, Agitated mill and their materials suitability, Ultra-fine grinder – Fluid energy mill, Cutting machines: knife cutters, Close circuit and Open circuit operation.

Unit 2

Separation of solids: gravity settling, sedimentation, thickening, elutriation, double cone classifier, rake classifier, bowl classifier.Centrifugal separation – continuous centrifuges, bowl classifier, super centrifuges, design of basket centrifuges; Industrial dust removing equipment – cyclones and hydro cyclones, with special reference to electrostatic and magnetic separators; Heavy media separations, floatation.

Mixing and Agitation: Mixing of liquids (with or without solids), mixing of liquids (with solids), mixing of liquids (with solids), mixing of powders, selection of suitable mixers, power requirement for mixing.

Unit 3

Filtration: Principle of Cake filtration, Pressure drop through filter media, compressible and incompressible filter cakes, Constant pressure and rate filtration, Continuous filtration, washing of filter cakes; Filtration – Theory, Filtration considerations, Batch and continuous filtration equipment (Pressure and Vacuum) – selection, operation and design of filters and optimum cycle of operation.

Text Books

  1. W. L. McCabe, J. C. Smith, and P. Harriot, “Unit Operations in Chemical Engineering, 6th Edition, McGraw Hill, 2001.
  2. W. L. Badger and J. T. Banchero, “Introduction to Chemical Engineering“, Tata McGraw Hill, 1997
  3. A. S. Foust, L. A. Wenzel, C. W. Clump, L. Naus, and L. B. Anderson, “Principles of Unit Operations“, 2nd Edition, John Wiley & Sons, 1994.


  • J. M. Coulson and J. F. Richardson,“Chemical Engineering Vol.I“, 4th Edition, Asian Books Pvt Ltd., India, 1998.

DISCLAIMER: The appearance of external links on this web site does not constitute endorsement by the School of Biotechnology/Amrita Vishwa Vidyapeetham or the information, products or services contained therein. For other than authorized activities, the Amrita Vishwa Vidyapeetham does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this web site.

Admissions Apply Now