flotation

Question 1

two major steps in floatation

Answer 1

1. conditioning
2. separation

Question 2

includes any operation in which one type of solid is separated from another type by floating one of them on the surface of the fluid.

Answer 2

floating

Question 3

the purpose of this is to create physical-chemical conditions for achieving appropriate selectivity, usually based on surface characteristics,
between particle species

Answer 3

conditioning

Question 4

This step intended to generate and introduce air bubbles into process vessel for contacting them with particulate species

Answer 4

separation

Question 5

In flotation, [articles attached to the air bubbles are in most applications removed from the process vessel as

Answer 5

froth

Question 6

The unit operation of flotation is often referred to as

Answer 6

froth flotation

Question 7

The ____________ stream is called a concentrate in the minerals industry, and the slurry underflow is termed ____________.

Answer 7

froth overflow, tailings

Question 8

3 types of chemical reagents used in floatation

Answer 8

1. collectors or promoters
2. frothers
3. modifiers

Question 9

4 types of modifiers

Answer 9

1. activators
2. pH regulators
3. depressants
4. dispersants and flocculants

Question 10

alter the surface of the mineral in order that it will become air-avid (to cause it to adhere to air bubbles)

Answer 10

Collectors or Promoters

Question 11

added to strengthen temporarily covering film of the air bubbles. It serves to stabilize the froth and holds the
the concentrate launder.

Answer 11

Frothers

Question 12

These are used to make a mineral surface amenable to collector coating.

Answer 12

Activators

Question 13

used to control or adjust pH, a very critical factor in many flotation
separations.

Answer 13

pH regulators

Question 14

assist in selectivity(sharpness of separation) or stop unwanted minerals from floating.

Answer 14

depressants

Question 15

also known as deactivators which deactivates the minerals surface by resisting it towards the action of collectors.

Answer 15

depressants

Question 16

important for the control of slimes that sometimes interfere with the selectivity and increase reagent consumptions

Answer 16

dispersants and flocculants

Question 17

in floatation, what are the known information?

Answer 17

1. density of materials
2. L/S, water to solid ratio
3. floatation reagents
4. concentration feed, tailings and concentrate
5. floatation cells type
6. contact time

Question 18

material balance for each unit can be used to determine

Answer 18

1. degree of recovery
2. size of each unit

Question 19

by using L/S ratio and contact time, ___________ can be determined

Answer 19

size of floatation tank

Question 20

Froth Flotation is most suitable for treating

Answer 20

quartz

Question 21

In Froth Flotation, the chemical agent added to cause air adherence is called

Answer 21

modifier

Question 22

Pine oil used in a flotation process acts as a

Answer 22

frother

Question 23

Any operation in which one solid is separated from another by floating one of them at or on the surface of a fluid

Answer 23

floatation

Question 24

The flotation agent that prevents coalescence of air bubbles as they travel to the surface of the water is/are

Answer 24

frothing agent

Question 25

A flotation modifier which assists in the selectivity (sharpness of separation) or stop unwanted minerals from floating.

Answer 25

depressant

Question 26

Dispersants are important for the control of slimes which sometimes interfere with
the selectivity and increase reagent consumption. Another term for dispersant is

Answer 26

deflocculant

Question 27

An example of a collector for flotation of metallic sulfides and native metals is

Answer 27

xanthates

Question 28

Which of the following is an example of a deflocculant?

Answer 28

lignin sulforate