31453 - Raw Materials Engineering T

Learning outcomes

 

Raw material engineering is a course finalised to learn the principles of  mineral processing and to give  the basic information related to mechanical treatment and plant design in order to obtain raw material prepared for the industry and for the construction sector.

Course contents

Brief history on some materials and some types of plants. The main properties of minerals and rock materials. Sampling in situ and in laboratory. Weight of sample and criteria of representativeness. The size of a set of particles. Achievement in the laboratory analysis of grain and their analytical representation. The size classification: direct and indirect classification methods. The screening industry. Main types of screens: capacity and efficiency. Theoretical basis of the indirect classification: the law of motion of a solid immersed in a fluid. The mechanical and centrifugal classifiers. The hydrocyclones. The performance of the classification action. The pretreatment and primary treatment of physico-mechanical wastewater: Grilling and filtration, sedimentation, flotation. The comminution. Comminution theory for the determination of energy consumption.  Definition and calculation of the work (work index) and specific energy in comminution. Crushing and Grinding. Design and operating parameters.  The cylindrical ball mills and bars: the calculation of energy consumption, choice of grinding charge  and coating. Concentration methods.  The preconcentrazione in heavy medium (sink-float). Gravimetric methods: Electrostatic and magnetic separation. The flotation: theoretical and physical chemical basis. The technology of flotation machines. Specific cases of design: general patterns of a complete mineral enrichment plant and of a plant for the aggregates preparation.

Readings/Bibliography

Lecture notes prepared by the teacher

Teaching methods

Teaching methods:

The course includes oral lessons in the classroom and seminars on specific topics of the program.

In the classroom, ppt presentation and videos by web.

Assessment methods

The final exam aims to evaluate the acquisition of the language and the mastery of the subjects proposed during the course

The final exam consists of a written test, related with exercises and demonstrations, and of an oral exam on the topics discussed in the classroom.

Teaching tools

The course includes exercises in the classroom and in laboratory, technical visits and seminars on specific topics of the program.

Office hours

See the website of Alessandra Bonoli