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Theoretical Principles of Gravity Concentration

Study program:
Mining Engineering (III semester -PhD)
Name of subject: Theoretical Principles of Gravity Concentration
Instructors:
Prof. Milena Kostović
Status: Optional
ECTS: 10
Prerequisites: -
Course Objectives:
Training students for independent scientific research in the field of gravity concentration of mineral or secondary raw materials or continuing advanced professional study in this area.
Learning Outcomes:
The creation of qualified experts who will be able to participate or lead scientific researches in the field of gravity concentration, to participate or lead strategic research in the aim of complex valorization of mineral and secondary raw materials and to ensure the transfer of scientific achievements in the practice of gravity concentration.
Content:

Theory teaching
Fraction composition of mineral raw materials according to density, size and shape. Concentration criteria. Application of statistical methods of analysis and prognosis of capabilities of gravity concentration. Criteria for separation of minerals by the gravity concentration. Energetic hypothesis of particle separation according to density. Movement of the particle in a fluid: particle settling in fluid without acceleration; settling velocity; movement of the particle in the condition of hindered settling; the impact of thixotropy on particle movement. Movement of the particle in the field of centrifugal force. Theoretical principles about stratification of particle in deep water: statistic, dynamic, kinetic; phases of particle movement in "deep" water; differential acceleration at free and hindered settling in "deep" water - mathematical formulations; attainment of the minimum potential energy level. Theory of particle separation under laminar flow water down a smooth inclined surface; the movement of particle down a smooth inclined surface in thin film of water; crtitical angle of inclined surface; Movement of particle in suspension. Density of suspension – calculation of density, limited density, viscosity and stability of the suspension, resistance to chemical and physical degradation. Mathematical interpretation of density curves; representing the results of a concentration by the Heidenreich, PIC, Paul and Kuhn, Serchar, Schaefer. Theoretical consideration about separation efficiency; error in separation efficiency; parameters of separation efficiency; partition coefficient, imperfection, density separation, egares, Ecart probable. Disadvantages, advantages and new possibilities of individual methods

Practical teaching
The appropriate scientific and experimental work in the field of gravity concentration of mineral or secondary raw materials that are the subject of the student investigation within the PhD dissertations.

Suggested Reading List:
  1. Ćalić N.:Teorijski osnovi pripreme mineralnih sirovina, Rudarsko-geološki fakultet, Beograd, 1990. 
  2. Weiss N.L. (Editor):SME Mineral Processing Handbook, Vol. 1, SME of the AIMMPE, New York, 1985.
  3. A.A.Abramov: Prerabotka, obogašćenije i kompleksnoje ispolzovanie tverdih poleznih iskopaemih, MGGU, Moskva,2001.
  4. Burt R.O. Gravity Concentration Technoloy, Elsevier, 1984.
  5. Ignjatović R.: Fizičke metode koncentracije mineralnih sirovina, Tehnički fakultet, Bor, 1983.
Conduct of the Course:
Consultative
Fund hours:
Lectures Exercises Other forms of teaching Study research
4 0 0 0
Assessment:
Final Exam ECTS
Oral Exam50

Classwork Assessment ECTS
Seminars50
Additional Assessment Criteria: -


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