390874
Description
Mind Map by Muhammad Afif, updated more than 1 year ago
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Created by Muhammad Afif
over 11 years ago
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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
- A ( Zn) K (MnO2) E(NH4Cl + H2O + ZnCL2)
- Alkaline Batteries
- A (Zn) K (MnO2) E (KOH)
- Rechargeable
- A (Zn) K (MnO2) E (KOH)
- Lead Acid Battery
- A (Pb) K(PbO2) E(H2SO4)
- Rechargeable by Charging, reverse Electrolysis
- A (Pb) K(PbO2) E(H2SO4)
- Zn-C Batteries
- Produce Powers
- 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)
- Zn,Cu,Au,Ni,Ag
- Fused Salt
- Produce metal that has e negatively
- typically light metals, al,mg,li,na,be,ti,ca,ta
- molten metals
- molten metals
- typically light metals, al,mg,li,na,be,ti,ca,ta
- fused salt electrolyte ex cryolite
- 400-1000C, 10-35kWh/kg, 75-95, 4-10V
- Voracious of Power
- Heat Loss Factor, Gas Evolution, Electrolyte Ressistant
- Heat Loss Factor, Gas Evolution, Electrolyte Ressistant
- Soluble in molten salt
- Produce metal that has e negatively
- Aqueous Electrowinning
- Electrorefining
- 99.99
- Dore Bullion Refining
- Anode is less pure
- <0.5V, <0.5kWh/kg, 90-99%
- 99.99
- Electrowinning
- Principal
- EDecomposition = -EAnode + EKatode (red)
- ECell = ED + overpotential
- Activation Polarization
- Concentration Polarization
- Ohmic Ressistance
- Bus bar Ressistance
- Gas Evolution on electrode
- Activation Polarization
- ECell = ED + overpotential
- Faraday Laws
- m = Ar*I*t/z/F
- 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
- Parallel for each A and K
- Cathode
- StarterSheet
- Same Metals
- New sheet everyneeds, no stripping
- Same Metals
- 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
- Eliminate cost of producing starter sheet
- Stripping Machine
- StarterSheet
- Anode
- Pb Alloys
- Graphite
- Titanium
- Platinum
- Nickel
- Stainless Steel
- Consider
- Price and Availability
- Corrosion Ressistance
- Mechanical Strength
- Conductivity
- Gas Evolution Overpotential
- Price and Availability
- Pb Alloys
- EDecomposition = -EAnode + EKatode (red)
- Needs Power
- Galvanic Cell
- Science and Engineering that study extraction & refinery metals using electrical power
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