12 Questions
What is a characteristic of pure metals?
They are shiny and malleable
Which metals are often found in their native state?
Metals with low chemical reactivity, such as copper and gold
What is the primary objective of the concentration of ore process?
To remove nonmetallic impurities and gangue from the ore
Which method of ore concentration is suitable for native ores such as gold and oxide ores?
Gravity separation or Hydraulic wash
What is the difference between a mineral and an ore?
A mineral is a substance that contains a low percentage of metal, while an ore contains a high percentage
What is the function of sodium ethyl xanthate in the froth flotation process?
It acts as a collector, making the ore particles water repellent
Why is bauxite considered an ore of aluminium, while china clay is not?
Because aluminium can be commercially extracted from bauxite, but not from china clay
What is the purpose of metallurgical processes?
To extract a metal of interest from its ore
What is the purpose of adding a depressant such as sodium cyanide in the froth flotation process?
To selectively prevent other metal sulphides from coming to the froth
What is hematite?
A mineral that contains a high percentage of iron
What is the characteristic of the ore that allows it to be separated from the gangue using the gravity separation method?
Its high specific gravity
What is the outcome of the froth flotation process?
The ore particles rise to the surface with the froth, while the gangue particles settle at the bottom
Learn about the properties of pure metals and how they are found in nature, including native elements and combined states. Discover the differences between reactive and non-reactive metals and how they are extracted.
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