Laboraroty and Pilot trials was completed at Chesils Electro Refinery, India to directly de-copperize the high nickelNickel electrolyteElectrolyte without any IX/SX and to produce a high purity, harvestable copperCopper cathodeCathode to low copperCopper concentrations. The laboratory trials were conducted on 1-cell laboratory skid and pilot trial was on a 2-cell emew skid, using the commercial size emew cells. The trial results demonstrated that copperCopper can be depleted very selectively from >35 g/L to <5 g/L using emew cells in the presence of >50 g/L nickelNickel with no nickelNickel deposition. The harvested copperCopper cathodeCathode was coherent and has a purity of >99.99% without any dendrite/nodule formationFormation or powder/cake formationFormation, while operating at currentCurrent densities in the range of 200–550 A/m2. Further depletion of copperCopper to lower concentrations (<50 ppm) was also demonstrated in the laboratory trials using a 3D cathodeCathode designDesign. The pilot results confirm that extremely selective, direct copperCopper metalMetal production is possible from nickelNickel streams, offering a sustainable and simpler flow sheet to recover battery metalsMetal while increasing the copperCopper circularityCircularity.

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Simplification of Battery Metal Flow Sheet Using Electrolysis for Selective, Direct Copper Recovery

  • A. Mishra,
  • K. Melana,
  • E. Saavedra

摘要

Laboraroty and Pilot trials was completed at Chesils Electro Refinery, India to directly de-copperize the high nickelNickel electrolyteElectrolyte without any IX/SX and to produce a high purity, harvestable copperCopper cathodeCathode to low copperCopper concentrations. The laboratory trials were conducted on 1-cell laboratory skid and pilot trial was on a 2-cell emew skid, using the commercial size emew cells. The trial results demonstrated that copperCopper can be depleted very selectively from >35 g/L to <5 g/L using emew cells in the presence of >50 g/L nickelNickel with no nickelNickel deposition. The harvested copperCopper cathodeCathode was coherent and has a purity of >99.99% without any dendrite/nodule formationFormation or powder/cake formationFormation, while operating at currentCurrent densities in the range of 200–550 A/m2. Further depletion of copperCopper to lower concentrations (<50 ppm) was also demonstrated in the laboratory trials using a 3D cathodeCathode designDesign. The pilot results confirm that extremely selective, direct copperCopper metalMetal production is possible from nickelNickel streams, offering a sustainable and simpler flow sheet to recover battery metalsMetal while increasing the copperCopper circularityCircularity.