EL3007 Electrometallurgy and Thermics Syllabus:
EL3007 Electrometallurgy and Thermics Syllabus – Anna University Regulation 2021
OBJECTIVE:
• This course aims to provide the basics of hydrometallurgy and electrometallurgy techniques that are used in the processing of minerals
UNIT I INTRODUCTION
Metallurgical industries in India with special reference to electrometallurgical industries. Preparation of cell feed for copper, zinc, aluminium, magnesium and electrolytic cells. Principles of solvent extraction/ ion exchange for the recovery of metallic values. Pollution and control measures adopted/recommended in electrometallurgical Industries like Al, Cr.
UNIT II ELECTROCHEMICAL PRINCIPLES
Cell voltage and its components- types of anodes and cathodes-necessity of diaphragms. Physicochemical properties of molten & aqueous electrolytes like conductivity, decomposition potential, density etc. Current and energy efficiency- features of aqueous and molten salt electrolysis distinction between electro winning and refining. Anode effect.
UNIT III AQUEOUS SYSTEM
Electro winning of zinc, copper and nickel. Operating conditions for electro winning of copper and Nickel. Electro refining of silver, lead and copper- periodic current reversal technique. Electrolytic metal powders-principles, preparation and characterization. Secondary recovery of metalsImportance and approaches with examples of lead and silver.
UNIT IV MOLTEN SALT ELECTROLYSIS
Hall-Heroult cell for electrowinning of Aluminium–composition and structure of cryolite electrolyte, Brief discussion on (anodes and) cathode pot construction, and reactions. Start up and operation of Cell- anode effect. Koope’s three layer process. Dow, I.G. and other types cells for production of Magnesium. Interference of impurities like moisture and sludge formation. Electrowinning of sodium, calcium, misch metal and titanium. Operating data for production of lithium and zirconium.- refining of titanium.
UNIT V THERMICS
Modes of electrical heating. Design criteria of arc furnaces. Description of furnaces used and the process for production of calcium carbide. Calcium silicide, Calcium cyanamide, fused alumina, ferroalloys, phosphorous, graphite and Silicon carbide.
TOTAL: 45 PERIODS
OUTCOME:
• Understand the basics electrometallurgy techniques
• Understand electrochemical principles
• Understand concepts of electro winning and electro refining
• Acquire knowledge on molten salt electrolysis
• Acquire knowledge on different modes of electrical heating.
TEXT BOOKS:
1. K. I. Popov, S. S. Djokic and B. N. Grgur. “Fundamentals of Electrometallurgy”, Kluwer Academic Publishing, 2002
2. H.S. Ray, Sridar and K.P. Abraham, “Extraction of Non-ferrous metals”, Affiliated East-West press, New Delhi, 1985.
REFERENCES:
1. Grjotheim K and Welch B.J., “Aluminium Smelter Technology”, Aluminium Verlag, 1982.
2. Strelets Kh.L., “Electrolytic Production of Magnesium”, Israel Program of Scientific Translation 1977.