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Principles of Metallurgy > Electrometallurgy > Flashcards

Electrometallurgy Flashcards

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1
Q

The branch of process metallurgy dealing with the
use of electricity for recovery or refining of metals.

The electrochemical effect of an electric current
brings about the reduction of metallic compounds
or Ions

A

Electrometallurgy

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2
Q

extraction of metals

A

electrowinning

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3
Q

purification of metals

A

electrorefining

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4
Q

PREREQUISITES

1) Separate sites where
____and____
reactions could occur
2) A path through which the
____ could pass
3) A medium through which the
____ could pass

A
  1. Oxidation,Reduction
  2. Electron
  3. Ions
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5
Q

electrolytic cell

The electrolyte contains ____ (made up of M^x cations and X^- anions)

A

MX

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6
Q

ELECTROLYTIC CELL

Anode is ____

A

Positive

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7
Q

ELECTROLYTIC CELL

____(loss of electrons) occur at the ____

A

Oxidation, Anode

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8
Q

electrolytic cell

Cathode is ____

A

Negative

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9
Q

ELECTROLYTIC CELL

____(gain of electrons) occurs at the ____

A

Reduction, Cathode

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10
Q

electrolytic cell

____(X^-) flow towards the ____ (positive electrode)

A

Anions, anode

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11
Q

electrolytic cell

____(M^+) flow towards the ____ (negative electrode)

A

Cations, cathode

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12
Q

electrolytic cell

Electrons flow from the ____ (+) to the ____ (-) through the wires connecting the electrodes to the power supply

A

Anode, Cathode

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13
Q

refers to the
process of
using electrolysis to
increase the purity of a
metal extracted from its ore
(compound or mixture of
compounds from which a
metal can be extracted
commercially).

A

Electrorefining

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14
Q

ELECTROREFINING PRINCIPLES

The ____ , positive electrode, is the impure metal to be ____.

A

Anode, Purified

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15
Q

ELECTROREFINING PRINCIPLES

____, loss of electrons, occurs at the anode

A

Oxidation

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16
Q

ELECTROREFINING PRINCIPLES

The ____, negative electrode, is the electrode at which the pure metal will be ____

A

Cathode, deposited

17
Q

ELECTROREFINING PRINCIPLES

____, gain of electrons, occurs at the cathode

A

Reduction

18
Q

ELECTROREFINING PRINCIPLES

the electrolyte is either a _____ or an ____ of the metal ions

A

molten salt, aqueous solution

19
Q

ELECTROREFINING PRINCIPLES

Electrorefining can be used to purify a number of metals including _______.

LIMA KA METALSSS

A

copper
nickel
cobalt
lead
tin

20
Q

ELECTROREFINING COPPER

ANODE

  1. Impure ____
  2. ____ occurs at the anode.
  3. ____ is oxidized at the anode.
  4. ____ are produced at the
    anode.
  5. Electrons flow from ____ to
    ____
  6. Anode ____.
  7. ____ ions migrate to cathode.
A
  1. Copper
  2. Oxidation
  3. Copper
  4. Electrons
  5. Anode to cathode
  6. Disintegrates
  7. Copper
21
Q

ELECTROREFINING COPPER

CATHODE

  1. ____ (thin copper foil or stainless steel blanks).
  2. ____ occurs at the cathode.
    3.____ ions migrate to the cathode.
  3. Copper ions are____ at the cathode.
  4. Solid copper is ____ at the cathode.
A
  1. Starter Sheets
  2. Reduction
  3. Copper
  4. Reduced
  5. Deposited
22
Q

refers to the process of using electrolysis to
extract a metallic element from the
compounds in its ore.

A

Electrowinning

23
Q

STAGES BEFORE ELECTROWINNING

A
  1. Mining
  2. Crushing
  3. Grinding
  4. Concentrating
  5. Leaching
  6. Electrowinning
24
Q

ELECTROWINNING COPPER

ANODE

  1. ____ plates
  2. ____ occurs at the anode.
  3. ____ is oxidized at the anode.
  4. Water is ____ at the anode.
  5. ____ gas and protons are produced
    at the anode.
  6. ____are produced at the anode.
  7. ____ flow from anode to cathode.
  8. ____ions migrate to cathode.
A
  1. lead alloy
  2. Oxidation
  3. Water
  4. Consumed
  5. Oxygen
  6. Electrons
  7. Electrons
  8. Copper
25
Q

ELECTROWINNING COPPER

CATHODE

  1. ____sheets (starter sheets) or ____ sheets (blanks)
  2. ____ occurs at the cathode.
  3. ____ ions migrate to the cathode.
  4. Copper ions are ____ at the cathode.
  5. Solid copper is ____ at the cathode.
A
  1. thin copper, stainless steel
  2. reduction
  3. copper
  4. reduced
  5. Deposited

Principles of Metallurgy (13 decks)

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