Mineral processing
Mineral Processing refers to the set of methods and processes carried out to separate, concentrate, and prepare mineral materials extracted from a mine, in order to obtain a final product with the appropriate grade for industrial use or sale.
What is the main objective of Mineral Processing?
Increasing the grade of the mineral (e.g., increasing the percentage of valuable metals such as gold, copper, iron)
Removing impurities and waste material (tailings)
Preparing the ore for subsequent stages such as smelting, casting, or use in various industries
Reducing transportation and processing costs by eliminating unnecessary material
Important Stages and Methods of Mineral Processing
Comminution
Includes crushing and grinding of ore into finer particles
Objective: Liberation of mineral particles from the host rock
Gravity Separation
Uses density differences between valuable minerals and waste for separation
Equipment: Shaking tables, cyclones, spirals
Flotation
Separates minerals based on hydrophobicity (water-repelling) and hydrophilicity (water-attracting) properties
Chemical reagents are added to allow valuable minerals to attach to air bubbles
Commonly used for metal deposits such as copper, lead, and zinc
Magnetic Separation
Separates magnetic minerals from non-magnetic ones
Application: Iron and magnesite mines
Hydrometallurgy
Extracts metals from ore using chemical solutions
Example: Gold leaching with cyanide
“We can easily manage if we will only take, each day, the burden appointed to it. But the load will be too heavy for us if we carry yesterday’s burden over again today, and then add the burden of the morrow before we are required to bear it factorial non.”
Rebert Kosta
