Analysis of Pot Operation at Reduced Amperage and New Scenarios

The content discusses the operation of a pot at reduced amperage, including internal energy calculations and determining the operating voltage in different scenarios at 300 KA and 270 KA. It also covers the calculation of anode immersion and anode-cathode distance (ACD) including the impact of the piston effect on immersion levels. Various images illustrate the calculations involved in these scenarios.

• Pot operation
• Amperage reduction
• Internal energy
• Operating voltage
• Anode immersion

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Uploaded on Oct 08, 2024 | 0 Views

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1. Pot Operation at Reduced Amperage

2. Given Condition Line Condition at 350A Internal Energy VACD VACD= Vpot-Vext-VAnode-VCathode-VBEMF = 4.2-0.26-0.26-0.36-1.82 = 1.51V Internal Energy = (Vpot-Vext-VAl)x I =(4.2-0.26-2.05)x350 =661.5 kW ACD ACD = (ACD Voltage / (Bath resistivity x Effective current density))-Thickness of bubble ACD= ( VACD / ( x jbath))-0.005= (1.51/(8400x0.00461))-0.005 = 0.034m = 3.4cm

3. Running Pot In New Scenarios Determining the Operating Voltage 300 KA VACD = Vpot-Vext-VAnode-VCathode-VBEMF = 4.478-((0.26x300)/350)-((0.36x300)/350)- ((0.26x300)/350)-1.82 VACD = 1.912 270 KA VACD = Vpot-Vext-VAnode-VCathode-VBEMF = 4.478-((0.26x270)/350)-((0.36x270)/350)- ((0.26x270)/350)-1.82 VACD = 2.209

4. Running Pot In New Scenarios Determining the VACD 300 KA Internal Energy = (Vpot-Vext-VAl)x I 661.5 = (Vpot-((0.26x300)/350)-2.05)x 300 Vpot = 4.478 V 270 KA Internal Energy = (Vpot-Vext-VAl)x I 661.5 = (Vpot-((0.26x270)/350)-2.05)x 270 Vpot = 4.701 V

5. Running Pot In New Scenarios Determining the ACD & Anode immersion 300 KA ACD= ( VACD / ( x jbath))-0.005 = (1.921 / (7200 x 0.00461))-0.005 = 0.053 = 5.3 cm ACD = 5.3 3.4 = 1.9 cm Piston Effect = Change in anode immersion / change in ACD=4.6 Piston effect in this scenario = 4.6 x 1.9 = 8.74 cm Original immersion = Bath height ACD = 18-3.4 = 14.6 cm Immersion after piston effect = 18 - 8.74 = 9.26 cm This scenario we will be able to run the pot.

6. Running Pot In New Scenarios Determining the ACD & Anode immersion 270 KA ACD= ( VACD / ( x jbath))-0.005 = (2.209 / (6480 x 0.00461))-0.005 = 0.069 = 6.9 cm ACD = 6.9 3.4 = 3.5 cm Piston Effect = Change in anode immersion / change in ACD=4.6 Piston effect in this scenario = 4.6 x 3.5 = 16.1 cm Original immersion = Bath height ACD = 18-3.4 = 14.6 cm Immersion after piston effect = 18 16.1 = 1.9 cm In this scenario sufficient immersion is not there, a proper operating voltage