Flotation Equipment

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What is the main drawback of electrolocation units?

Their high cost
The need for frequent replacement of electrodes (correct)
Their inability to treat potable water
The requirement for high pressure

Which type of flotation process is gaining popularity for the treatment of slaughterhouses, poultry processing, sea food processing, and food processing waste?

Dissolved air flotation (correct)
Dispersed air flotation
Vacuum flotation
Electroflocation

What is the difference between vacuum and pressure flotation?

Vacuum flotation is limited by the vacuum achievable, while pressure flotation generates fine air bubbles
Vacuum flotation can only be run as a batch process, while pressure flotation can be operated continuously (correct)
There is no difference between vacuum and pressure flotation
Vacuum flotation requires mechanical energy, while pressure flotation is operated by the application of pressure

Which type of flotation machines are most commonly used in the mineral industry?

Mechanical flotation machines (C) Signup and view all the answers

What is the main difference between mechanical cells and flotation columns?

Mechanical cells require mechanical agitation, while flotation columns do not (A) Signup and view all the answers

What are the two types of collector molecules mentioned in the text?

Ionic and non-ionic (D) Signup and view all the answers

What is the function of a selective collector in a flotation system?

To float highly hydrophobic minerals (C) Signup and view all the answers

How are ionizing collectors classified?

By the type of ion that produces the water-repellent effect (C) Signup and view all the answers

What is the main difference between cationic and anionic collectors?

Cationic collectors attach to negatively-charged mineral surfaces, while anionic collectors attach to positively-charged surfaces (B) Signup and view all the answers

What is the primary use of cationic collectors?

Flotation of silicates and certain rare-metal oxides and for the separation of potassium chloride (sylvite) from sodium chloride (halite) (A) Signup and view all the answers

What is the main advantage of xanthates as collectors for sulfide minerals?

They are highly selective for sulfide minerals and do not have any affinity for the common non-sulfide gangue minerals (D) Signup and view all the answers

What is the structure of sodium oleate?

C18H33NaO2 (D) Signup and view all the answers

What is the main disadvantage of anionic collectors for oxide minerals?

They are not as selective as the collectors used for sulfide mineral flotation, as they attach to the surface by electrostatic attraction rather than by chemically bonding to the surface (B) Signup and view all the answers