Hydrometallurgy 4 - Precipitation from Leach Solutions

Areas of Study: Mineral Processing

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A course on physical and chemical processes for precipitation from leach solutions, covering crystals and crystallization, engineering aspects, and ionic, hydrolytic and reduction methods of precipitation. It is the last in a series of four hydrometallurgy courses.


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  • Audience Level:
  • Professional
  • Enrollment:
  • Required
  • Duration:
  • 15 hours

Course Summary


Precipitation of Leach Solutions is the fourth in a series of four hydrometallurgy courses by the author, written for university students as well as practicing engineers and metallurgists.

The Hydrometallurgy series covers the elementary theoretical basis of solution chemistry, the engineering aspects, and the technical applications for a large variety of raw materials, e.g. metals, oxides, sulfides, phosphates, silicates, and others. It also covers the purification-concentration steps such as adsorption on activated charcoal, ion exchange, and solvent extraction. Finally, the general aspects of precipitation from aqueous solutions are covered with numerous examples. The series is characterized by clear and simplified flowsheets, numerous chemical equations written mainly in ionic form, many illustrations for equipment and plants, and finally a lucid style presenting the facts point by point as concisely as possible.

Hydrometallurgy 4 - Precipitation of Leach Solutions covers physical precipitation, the principles of crystals and crystallization, and engineering aspects and applications. It also covers chemical precipitation and the principles of ionic and hydrolytic precipitation as well as precipitation by reduction.


The course comprises 18 learning sessions, each of 30 - 60 minutes duration, plus supporting figures, tables, images and references, and interactive reviews that confirm achievement of the learning objectives. The total duration of the course is estimated at 15 hours.

Learning Outcomes

  • Discuss and apply physical precipitation, the principles of crystals and crystallography, and engineering aspects and applications.
  • Discuss and apply chemical precipitation and the principles of ionic and hydrolytic precipitation as well as precipitation by reduction.

Recommended Background

  • First year university level physics and chemistry.

Fathi Habashi

Fathi Habashi is Professor Emeritus of Extractive Metallurgy at Laval University in Quebec City. He holds a B.Sc. degree in Chemical Engineering from the University of Cairo (1949), a Dr. techn. degree in Inorganic Chemical Technology from the University of Technology in Vienna (1959), and Dr.Sc. h.c. from the Saint Petersburg Mining Institute in Russia (1993). He was a postdoctoral fellow at the Department of Chemistry, University of Vienna (1959 - 1960), then he held the Canadian Government Scholarship in Ottawa (1960 - 1962), taught at Montana College of Mineral Science & Technology (1964 - 1967), then worked at the Extractive Metallurgical Research Department of Anaconda Company in Tucson, Arizona before joining Laval in 1970. In 1998 he was named a Fellow of the Canadian Institute of Mining, Metallurgy, and Petroleum and in 1999 he received its silver medal. He is an Honorary Professor at the Technical University of Oruro in Bolivia, Honorary Citizen of the city of Oruro, Governor at the Fondation de l'Université Laval, and Member of Le Cercle des Ambassadeurs in Québec City.

He has published 75 research papers, 110 review articles, 120 historical articles, over 130 trip reports, 15 technical reports, over 120 book reviews, and holds 4 patents.