Metal extraction

What is "yellowcake" in uranium extraction?

• A food by-product

• A type of explosive

• A concentrated uranium product

• A chemical reagent for leaching

What is the purpose of a leach solution in the leaching process?

• To crush the ore into fine particles

• To transport the ore to the processing plant

• To dissolve valuable metals from the ore

• To filter impurities from the final product

Electrowinning is the final step in hydrometallurgy. What characterizes this process?

• Metal extraction using high-temperature furnaces

• Metal recovery via aqueous solutions and chemical reactions

• Vaporization of metals followed by condensation

• Mechanical separation of ores using magnetic fields

Why is current density critical in electrowinning?

• It determines the color of the metal deposit

• It controls the rate of deposition and metal quality

• It prevents oxygen formation at the anode

• It reduces electrolyte temperature

What is the liquid called that contains the dissolved metals after leaching?

• Ore Placement

• Metal Recovery

• Yellowcake

• Pregnant Leach Solution (PLS)

Polymetallic ores are ores that:

• Contain more than one extractable metal

• Are composed of pure elemental metals

• Contain only one precious metal like gold or silver

• Consist of organic compounds with light metals

Extractive metallurgy is the branch of metallurgy that focuses on

• Studying the mechanical properties of metals

• Producing alloys from pure metals

• Protecting metals from corrosion

• Extracting metals from ores or raw materials

What does the term sorption refer to?

• The adhesion or absorption of gases or liquids by a solid

• The reduction of particle size by grinding

• The process of separating metals from ores by electrolysis

• The ionic bonding between metals and non-metals

In electrowinning, the cathode is the electrode where:

• Oxygen gas is produced

• Acid is regenerated through water oxidation

• Metal ions gain electrons to form solid metal

• Impurities accumulate

Cyanex 272 is most commonly used to extract which of the following metals

• Copper (Cu)

• Cobalt (Co)

• Uranium (U)

• Gold (Au)