Chemical Metallurgy: verschil tussen versies
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| Regel 19: | Regel 19: | ||
===25 januari 2019 - voormiddag=== | ===25 januari 2019 - voormiddag=== | ||
# One of the most important methods in mineral processing | # One of the most important methods in mineral processing is froth flotation. Describe the principles of froth flotation and give the conditions that need to be fulfilled for a success separation of ore particles from gangue material by froth flotation. | ||
is froth flotation. Describe the principles of | # Describe the basic flow sheet of a solvent extraction circuit. | ||
froth flotation and give the conditions that need to be | # Describe the different zones in a column if a resin in A+form is eluted by a solution of BY, taking into account that the resin have a preference for B+ over A+. How will the concentration of B+ change in the effluent as a function of effluent volume? | ||
fulfilled for a success separation of ore particles from | # Why is the presence of iron in zinc ores an issue in the extractive zinc metallurgy? How can iron be removed from zinc-containing leachates? | ||
gangue material by froth flotation. | # The two main approaches for separation of rare earths are the chloride and the nitrate process. What are the differences between these processes? What are the advantages and disadvantages of these two approaches? | ||
# Describe the basic flow sheet of a solvent extraction | |||
circuit. | |||
# Describe the different zones in a column if a resin | |||
in A+form is eluted by a solution of BY, taking into | |||
account that the resin have a preference for B+ over | |||
A+. How will the concentration of B+ change in the | |||
effluent as a function of effluent volume? | |||
# Why is the presence of iron in zinc ores an issue in | |||
the extractive zinc metallurgy? How can iron be removed | |||
from zinc-containing leachates? | |||
# The two main approaches for separation of rare earths | |||
are the chloride and the nitrate process. What are | |||
the differences between these processes? What are | |||
the advantages and disadvantages of these two approaches? | |||
Ik weet niet hoe ik de nummering goed krijg. Kan iemand anders wel doen... | Ik weet niet hoe ik de nummering goed krijg. Kan iemand anders wel doen... | ||
Versie van 26 jan 2019 17:49
Vakinformatie
Het vak werd voor het eerst gegeven in 2019 door Koen Binnemans. Hij stelde op voorhand een lijst met examenvragen ter beschikking. Mondeling examen met schriftelijke voorbereiding.
Examenvragen
18 januari 2019 - namiddag
- What is the purpose of crushing, grinding and milling operations in mineral processing? Why are not all ores milled to a very fine particle size?
- For what applications can ammoniacal leaching offer an advantage in comparison to leaching with strong acids? What are advantages and disadvantages of ammoniacal leaching?
- What is the phase continuity in a mixer-settler? How can the phase continuity be controlled? How can you determine the type of phase continuity? What factors influence the choice of one phase continuity over the other in a solvent extraction process?
- How can deionised water be prepared by using ion-exchange resins?
- (a) What are the basic steps of the PUREX process? (b) What’s the methodology to separate uranium and plutonium from each other?
25 januari 2019 - voormiddag
- One of the most important methods in mineral processing is froth flotation. Describe the principles of froth flotation and give the conditions that need to be fulfilled for a success separation of ore particles from gangue material by froth flotation.
- Describe the basic flow sheet of a solvent extraction circuit.
- Describe the different zones in a column if a resin in A+form is eluted by a solution of BY, taking into account that the resin have a preference for B+ over A+. How will the concentration of B+ change in the effluent as a function of effluent volume?
- Why is the presence of iron in zinc ores an issue in the extractive zinc metallurgy? How can iron be removed from zinc-containing leachates?
- The two main approaches for separation of rare earths are the chloride and the nitrate process. What are the differences between these processes? What are the advantages and disadvantages of these two approaches?
Ik weet niet hoe ik de nummering goed krijg. Kan iemand anders wel doen...