Flotation

Question 2

it is a solid-solid separation process in which one type f solid in a solid mixture is separated from the other by floating into a surface of a liquid

Answer 2

flotation

Question 3

it is one of the ost employed methods in concentration mineral ores in the mining industry

Answer 3

flotation

Question 4

utilization of froth or bubbles in separation

Answer 4

froth flotation

Question 5

3 steps in a flotation process

Answer 5

1. conditioning
2. injection of air bubbles
3. separation

Question 6

3 types of chemical reagents used during flotation process

Answer 6

1. collectors
2. frothers
3. modifiers

Question 7

4 examples of collectors or promoters

Answer 7

1. xanthates & dithiophosphates
2. refined fatty acids, petroleum, & sulfonates
3. fatty amines & amine salts
4. fuel oil & kerosene

Question 9

these chemical reagents increase or promote the floatability of minerals

Answer 9

collectors or promoters

Question 10

these reagents alter the mineral surface to make the mineral become air-avid or adhere to air bubbles

Answer 10

collectors or promoters

Question 11

these are used for metallic surfides and native metals

Answer 11

xanthates and dithiophosphates

Question 12

these are used for fluorspar, phosphate rock, iron ore, non-metallics

Answer 12

refind fatty acids, petroleum, and sulfonates

Question 13

these are used for quartz, potash and silicates

Answer 13

fatty amines and amine salts

Question 14

these are used for coal, graphite, sulfur, and molybdenite

Answer 14

fuel oil and kerosene

Question 15

these chemical reagents build the froth which serves as the buoyant medium for the valuable minerals to be floated

Answer 15

frothers

Question 16

4 examples of frothers

Answer 16

1. pine oils
2. cresylic acid
3. polypropylene glycol ether
4. 5 to 8 carbon aliphatic alcohols

Question 17

4 subclassifications of modifiers

Answer 17

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

Question 18

these activate the mineral surface to prepare them for collector reagents

Answer 18

activators

Question 19

2 examples of activators

Answer 19

1. copper ion
2. sodium sulfide

Question 20

these regulate, control, or adjust pH in order to clean mineral surface and precipitate soluble salts out of the solution

Answer 20

regulators

Question 21

4 examples of regulators

Answer 21

1. lime
2. caustic soda
3. soda ash
4. sulfuric acid

Question 22

these help stop unwanted materials from floating by depressing or sinking them

Answer 22

depressants

Question 23

these reagents are highly selective

Answer 23

depressants

Question 24

3 examples of depressants

Answer 24

1. calcium cyanide
2. zinc sulfate
3. quebracho

Question 25

this depressant depress pyrite and float galena, sphalerite, or copper sulfides

Answer 25

calcium cyanide

Question 26

this depressant depress Zinc Sulfide while floating Lead (II) Sulfide

Answer 26

zinc sulfate

Question 27

this depressant depresscalcite while floating fluorite

Answer 27

quebracho

Question 28

these modifiers control slimes, interfere with selectivity and increase consumption of reagent of minerals

Answer 28

dispersants and flocculants

Question 29

these promote dispersal or clumping of particles

Answer 29

dispersants and flocculants

Question 30

3 examples of dispersants and flocculants

Answer 30

1. soda ash 2. lime soda 3. liginin sulfonates