Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chem > Metallurgy > Flashcards

Metallurgy Flashcards

(50 cards)

Start Studying
1
Q

Abundance of Al

A

8.3% and third most in overall and 1st in metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Ruby composition

A

Al2O3 with Cr as impurity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Sapphires composition

A

Al2O3 with Co has impurity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

2nd most abundant metal

A

Iron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Al ore

A

Bauxite
Kaolinite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Fe ore

A

Haematite
Magnetite
Siderite
Iron pyrite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Cu ore

A

Copper pyrites
Malachite
Cuprite
Copper glance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Zn ore

A

Zinc blende or sphalerite
Calamine
Zincite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Undesirable material

A

Gangue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Benefaction

A

Concentration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Difference in specific gravity

A

Hydraulic washing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Sulphide ores

A

Froth floatation method

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Collectors

A

Pine oil, fatty acid, xanthates
Enhances wetting of the minerals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Stabilizers

A

Cresols, aniline
Stabilizes the froth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Mineral gets wetted by and gangue by

A

Oils and water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Two sulphide ores can be separated by

A

Adding depressants like NaCN in case of ZnS and PbS

ZnS doesn’t come to the froth but PbS does

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Bauxite impurities

A

SiO2 and iron oxides and titanium oxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Leaching if aluminum

A

Addition of con NaOH at 473 to 523 k at 35-36 bar called digestion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Sodium aluminate is neutralized by adding

A

CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Addition hydrated Al2O3 to the solution

A

Seeding for precipitation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Leaching

Study These Flashcards
A

Al, Ag and Au

22
Q

Au and ag is leached with

Study These Flashcards
A

Dilute NaCN and KCN

23
Q

Calcination

Study These Flashcards
A

Vaccum for carbonates and hydrides

24
Q

Roasting

Study These Flashcards
A

In the presence of air and for sulphide ores

25
Sulphide ores of cu are heated in
Reverberatory furnace
26
FeO + SiO2
FeSi03 ( slag)
27
Extraction of iron from its ore What is mixed with the ore
Limestone and coke
28
Extraction of iron from its ore Which provides the necessary heat for the reaction
Burning coke
29
Extraction of iron from its ore At 500 to 800 K what conversions occur
Fe2O3 to Fe3O4 Fe3O4 to Fe and CO2 Fe2O3 to FeO and co2 All reactions in the presence of CO
30
Limestone decomposes to CaO and reacts with?
Silicon impurities to from slag CaSiO3 (900-1500K)
31
Above what temp is the reaction spontaneous
1073K
32
4% C contains iron
Pig iron
33
Cast iron
3% C
34
Wrought iron or cast iron
Prepared form cast iron in reverberatory furnace having haematite lining
35
Cu from cuprous oxide extraction
Cu2S +3O2 - Cu2O Cu2O + C - cu + co FeO + SiO2 - Fesio3 Cu2S + Cu2O - Cu + So 2 ( cu obtained is called blister copper due to release of so2
36
Copper matte
Cu2S and FeS
37
Zinc from zinc oxide
Zinc oxide with coke to give zinc and co Rapid chilling
38
Hall Herodotus process
Al oxide is mixed with Na3 AlF6 or CaF2 Which lowers the melting point of the mixture Carbon carbide and graphite abide
39
Cu from low grade ores
By hydro metallurgy Leached using acid or bacteria
40
In gold and silver leaching with cn what is used as reducing agent
Zinc
41
Distillation
Low boiling metals Zinc me mercury
42
Liquation
Low melting Tin
43
Electrolytic refining
Impure metal as anode and pure metal as cathode Copper - electrolyte is cuso4 zinc
44
Zone refining
High purity - gallium, germanium, silicon, boron,indium
45
Vapor phase refining Monds recess Van arkel method
Volatile metal Easily decomposable Nickel Zirconium and titanium
46
Chromatographic method
Paper chromatography and column chromatography Column is used for minute particles and not very different chemical properties
47
Bronze composition is
Copper and tin
48
Brass composition
Copper and zinc
49
Coinage alloys
Copper and nickel
50
German silver
Cu - 25-30% Zn - 25-30% Ni - 40-50%

Chem (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions