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390874
ElectroMetallurgy
Description
An introduction of electrometallurgy, science and engineering of extraction metal by zapping them inside water/fused salt.
No tags specified
metallurgy
metallurgy
too da*n high
Mind Map by
Muhammad Afif
, updated more than 1 year ago
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Created by
Muhammad Afif
over 10 years ago
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Resource summary
ElectroMetallurgy
Introduction
Science and Engineering that study extraction & refinery metals using electrical power
Basic Principal
Galvanic Cell
Produce Powers
Anode (-) Katode (+)
Examples
Zn-C Batteries
A ( Zn) K (MnO2) E(NH4Cl + H2O + ZnCL2)
Depolarisator Case
Unrechargeable
Alkaline Batteries
A (Zn) K (MnO2) E (KOH)
Rechargeable
Lead Acid Battery
A (Pb) K(PbO2) E(H2SO4)
Rechargeable by Charging, reverse Electrolysis
Electrolytic Cell
Needs Power
Anode (+) Katode (-)
Examples
Electrowinning
Aqueous Electrowinning
Zn,Cu,Au,Ni,Ag
Recovers metals from pregnant leach solution by Electrolysis
Catode produce "heavy" solid metals
Inert Anode
Acid (H2O) Base (OH-)
below 100C, 2-5V, 2-3.5 kWh/kg, 80-90%(Current Eff)
Fused Salt
Produce metal that has e negatively
typically light metals, al,mg,li,na,be,ti,ca,ta
molten metals
fused salt electrolyte ex cryolite
400-1000C, 10-35kWh/kg, 75-95, 4-10V
Voracious of Power
Heat Loss Factor, Gas Evolution, Electrolyte Ressistant
Soluble in molten salt
Electrorefining
99.99
Dore Bullion Refining
Anode is less pure
<0.5V, <0.5kWh/kg, 90-99%
Principal
EDecomposition = -EAnode + EKatode (red)
ECell = ED + overpotential
Activation Polarization
Concentration Polarization
Ohmic Ressistance
Bus bar Ressistance
Gas Evolution on electrode
Faraday Laws
m = Ar*I*t/z/F
Current Efficiency = IDeposition/IApplied
Energy Consume = V*I*t/1000/m
Voltage Efficiency = VDecomposition / Vactual
Energy Efficiency = VoltageEff x CurrentEff
Circuit of ElectrolysisTank
Parallel for each A and K
Perpendicular for cross tank
Cathode
StarterSheet
Same Metals
New sheet everyneeds, no stripping
Permanent
Stripping Machine
Stainless Steel and Aluminum
Permanent!
Advantages over Starter Sheet
Eliminate cost of producing starter sheet
Maintain verticality
minimize nodule, dendrite and short circuits
Possibe for higher current operation, cause maintaining uniformity distance beetween A and K
Anode
Pb Alloys
Graphite
Titanium
Platinum
Nickel
Stainless Steel
Consider
Price and Availability
Corrosion Ressistance
Mechanical Strength
Conductivity
Gas Evolution Overpotential
Media attachments
electrowin (image/jpg)
elets (image/jpg)
cathode (image/jpg)
anode (image/jpg)
electrowinyg (image/jpg)
battery (image/jpg)
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