CuO + 2 Hâș â CuÂČâș + HâOExample of acid dissolution dâa copper oxide.
Use when: The assessment of a real ore must include its other phases and the consuming gangue.
Metal dissolution by leaching
Link selective dissolution, reagents and contact time.
What is happening?
Leaching transfers elements from a solid to a solution. The choice of medium depends on the phases present: an oxide, a carbonate and a sulfide do not dissolve according to the same reactions.
Temperature, particle size, agitation and composition of the medium influence the speed and selectivity. Dissolving impurities can increase reagent consumption and complicate subsequent purification.
The formulas, with their conditions.
X = 1 â nrĂ©siduel/ninitialn: quantity of metal or phase monitored; X: extracted fraction.
Use when: Compare on the same analytical basis, correcting the samples.
Where is this principle used?
Copperâcobalt plant
Prepare a solution to purify by SX, precipitation or electrolysis.
Hydrometallurgical recycling plant
Selectively dissolve metals from secondary materials.
What to observe in the experiment
For identical ore, compare the extraction and reagent consumption when the contact time increases.
References and readings
This sheet explains the principles and their assumptions. Educational simulation can simplify the process; an industrial model requires suitable data and validation.
Have you understood the essentials?
Only one correct answer per question. Answer all three questions, then view the answer key.
Intu Lab · Understanding sheet · Kimba Christian