Solid Fluid Systems Systems CHMT4006/4008 Course Brief 2019 Course Co-ordinator: Prof Jean Mulopo (JM) (RW311) Tel: 011-717-7507
[email protected] jean.mulopo2@ wits.ac.za Course Lecturer (s): Prof Jean Mulopo (JM) RW311 Tel: 011-717-7507
1. COURSE BA CKGROUND AND PURPOSE
It is essential that a process engineer understands the interactions between solid particles and fluids, because so many processes involve the processing (e.g. comminution, classification, crystallization, filtration, etc.) of particles in fluids. This course introduce the fundamental concepts and application of equations describing particle-fluid interactions and particle motion to model physical systems within the context of industrial applications aiming to design solid-fluid separation processes and will give the student the tools to deal with issues in this field. (Note that this course shares lectures with the Particulate Systems course) 2. COURSE OBJ ECTIVES
This course aims to:
Introduce the fundamental concepts and application of equations describing particle-fluid interactions and particle motion to model physical systems within the context of industrial applications aiming to design solid-fluid separation processes. 3. COURSE OUTCOMES
After attending the lectures in this course, working through the tutorials and studying the recommended textbooks, students should be able to: 1. 2. 3. 4. 5.
Outline and describe different solid-liquid separation techniques. techniques. State the formulae and describe the physical meaning meaning of dimensionless dimensionless numbers. Describe the basic concepts related to particle-fluid motion. Apply relevant relevant equations to a given physical physical situation. situation. Solve solid-fluid separation problems and perform basic design calculation for separation equipment.
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ECSA Outcome examined in this cours e 1:
Assessment
Satisf actory Performance
Problem solvi ng
Learning outcome: Demonstrate competence to identify, assess, formulate and solve convergent and divergent engineering problems creatively and innovatively.
2: Application of engineering knowledge
scientific
Marked assignments, tests and examination
50% final mark for th e course
and Marked assignments, tests and examination
Learning outcome: Demonstrate competence to apply knowledge of mathematics, basic science and engineering sciences from first principles to solve engineering problems.
50% final mark for th e course
4. PRIOR KNOWL EDGE ASSUMED
Prerequisites: Second Year courses in Process Engineering 5. COURSE CONTENT
Topic 1. Particle characterisation 2. Particle settling velocity 3. Packed beds
Content
4. Fluidised beds
5. Comminution and Classification
Describe the particulate state and characterise and manipulate particle size distributions mathematically (JM) Predict the behaviour of a particle settling in a fluid as a function of fluid and particle properties (JM) Calculate the pressure drop when fluids flow through packed beds of known composition in laminar and turbulent f low Design packed beds for a given duty (JM) Describe various aspects of fluidised bed behaviour (gas flow, solids mixing, bubble behaviour, elutriation, heat and mass transfer, etc.) Calculate mass and energy balances for fluidised beds in order to predict their behaviour, taking the above processes into account (JM) Size a grinding mill for a specified duty Predict the performance of a mill given a characterization of the ore, using the Bond and the Population Balance Models Apply established classification models to determine expected separation in a hydrocyclone (MB)
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6. Flotation
Describe key factors affecting hydrophobicity of particles in the flotation context, and factors which affect the ef ficiency with which particles attach to bubbles Use the first order reaction rate analogy to describe flotation kinetics Predict the recovery from batch and continuous flotation units Design flotation flowsheets involving roughing, scavenging and cleaning banks (MB)
6. ASSESSMENT AND RULES
6.1
Components of the Assessment
A mid-term test will be held in mid-April and will count 35 % of the final mark for the course. 15% will be allocated to performance during tutorials (this may involve short tests as announced). 6.2
Assessment Summary
Assignment Test Term-end exam 6.3 Due Perfor mance Requirement s None 6.4. Calculator s in examination s Any calculator may be used; provided the memory is computationally intensive problems will be set.)
15% 35% 50%
cleared before the test or exam. (No
6.5. PLAGARISM (thus all materials should be referenced) or COPYING of any sort will NOT be allowed – in such a case both (multiple) parties will be penalized and such work will be awarded 0%. The case wil l also be referred to the legal office or the School ’s ethics committee. If you missed any assessment you must complete an absence form available from Mrs Maria and return it with the necessary supporting documents for consideration by the School/ Faculty.
7. TEACHING AND LEARNING APPROACH
Lectures will be given on various topics as set out in this course brief. Class discussions and questions will be encouraged. The student is expected to consult resource materials in the library and on the internet. When working in groups each member is expected to actively contribute to the design project, to discuss, question and interpret all the necessary information that may be relevant to the design problem.
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7.1 Teaching arrangements
Lectures: Fridays 8H00-09H45 in P114 Tutorial dates and venue: Consult timetable for venue and actual dates Test date: check Test timetable 7.2 Consultation times
Please see notice outside lecturer’s offices or else, if you wish to consult outside these hours please send an e-mail. This e-mail should include your name, student number and course code in the subject line (e.g. Name: Reginald Mashego, Student number: 0323511, Course code: CHMT4006), and remember that it might take a day or so to answer. Also, please note that the lecturers might be away, so check the out of office. 8. COURSE MATERIALS AND OTHER INFORMATION
The following textbooks are highly recommended for regular consultation as aids in understanding and expanding the material given in the lecture course. It is always useful to use another references in conjunction with lecture notes, as some topics may be explained either in a different way, or in greater depths. These should be in the library. 8.1 Prescribed
1. Coulson J.M. & Richardson J.F., Chemical Engineering Volume 2, 5thed, Butterworth-Heinmann, 2002, ISBN:075064451 2. Introduction to Particle Technology, 2nd Edition. Martin J. Rhodes (Editor). ISBN: 978-0-47001428-8 8.2 References
1. “Introduction to Mineral Processing”, Kelly and Spotttiswood, Wiley, 1982 2.
“Modelling and Simulation of Mineral Processing Systems”, R P King, Butterworth. 2001
Note: Resourc e materials (notes, handouts , etc.) and related infor mation w ill always be made available on the e-learnin g si te.
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