18 Questions
What is the primary consideration in the implementation of any leaching operation?
Degree of dissolution
In a leaching process, what constitutes a loss of the metal if it remains unreacted in the ore after leaching?
Degree of dissolution
What controls the overall rate of the leaching process according to the presented information?
Diffusion from surface vicinity
Why is selectivity of leaching an important factor in a leaching operation?
To prevent unwanted species from being dissolved
Which factor influences the viability of a leaching operation by affecting the dissolution reactions of the metallic species?
Selectivity of leaching
If one wanted to increase the overall rate of a leaching process, which mechanism should be focused on, based on the information provided?
Diffusion from surface vicinity
What is the term used to describe the solution produced after the leaching process is completed?
Pregnant solution
What should be the solubility of waste minerals in the solution to achieve an acceptable separation of valuable and waste minerals during leaching?
Low solubility
What determines the rate at which the leaching reaction proceeds in a single stage leaching process?
Diffusion of reagents to the mineral surface
What does the thermodynamic characteristics of the reaction system indicate in a leaching process?
Maximum possible extent of mineral conversion
Which mechanisms are involved in determining the overall leaching rate in a single stage leaching process?
Diffusion to mineral surface and adsorption on surface
Why is it important for waste minerals to have low solubility in the leach solution?
To facilitate subsequent metal recovery
How does particle size influence the leaching process?
Larger particles take longer to leach due to thicker shells of leached ore
How does the selectivity of leaching reactions impact the purity of the metal-bearing solution?
Low selectivity results in a purer metal-bearing solution
What determines the cost of the leaching process?
Materials of construction and quantities of reagents
How does the capital cost of leaching equipment vary significantly?
Varies based on materials of construction and required operating conditions
Which factor influences the amount of time needed to dissolve a metal from ore?
Particle size of the ore
Why does the leaching rate slow down as time passes in a shrinking-core model?
Thickness increases in the shell of leached ore, slowing down diffusion
Test your knowledge on the selectivity of leaching reactions, cost of leach solutions, and capital cost of leach equipment in metallurgy. Explore how these factors affect the purity of metal-bearing solutions and overall leaching process.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
