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Toyo SmelterSmelter & Refinery, Sumitomo MetalMetal MiningMining Co., Ltd. produces 450,000 tons of high gradeGrade copperCopper per year in three tank housesTank house. Conventional starting sheet technologyConventional starting sheet technology has been used at Toyo tank house #1 and Niihama tank house. The Niihama tank house commenced operationsOperation in 1919. The currentCurrent density at the Niihama tank house and the Toyo tank house #1 has reached 320 A/m2 with approximately 100 years of operational experience and technological advancements. To achieve high current efficiencyCurrent efficiency under condition of 320 A/m2 operationOperation, both tank housesTank house have undertaken measures to optimizeOptimize the adjustment of the cathodeCathode assembly machine and the anodeAnode pressing machine in order to improve the verticality of cathodesCathode and anodesAnode and to maintain uniform distances between cathodesCathode and anodesAnode. Additionally, the concentration of the electrolyteElectrolyte was meticulously controlled to prevent anodeAnode passivationPassivation, and the adjustment of the processingProcessing raw materials to regulate the impurityImpurity concentration in the electrolyteElectrolyte was also improved to maintain stable high currentCurrent density operationsOperation. As a result, a current efficiencyCurrent efficiency close to 98% was achieved at a currentCurrent density of 320 A/m2. This report outlines the improvements that have been implemented to date.

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High Current Density Operation at Toyo Tank House

  • 会议论文

  • 发表日期：

    2025年

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  • K. Kurimoto,
  • R. Aoki,
  • K. Takenaka,
  • T. Fuke,
  • S. Endo,
  • T. Kudo

摘要

Toyo SmelterSmelter & Refinery, Sumitomo MetalMetal MiningMining Co., Ltd. produces 450,000 tons of high gradeGrade copperCopper per year in three tank housesTank house. Conventional starting sheet technologyConventional starting sheet technology has been used at Toyo tank house #1 and Niihama tank house. The Niihama tank house commenced operationsOperation in 1919. The currentCurrent density at the Niihama tank house and the Toyo tank house #1 has reached 320 A/m2 with approximately 100 years of operational experience and technological advancements. To achieve high current efficiencyCurrent efficiency under condition of 320 A/m2 operationOperation, both tank housesTank house have undertaken measures to optimizeOptimize the adjustment of the cathodeCathode assembly machine and the anodeAnode pressing machine in order to improve the verticality of cathodesCathode and anodesAnode and to maintain uniform distances between cathodesCathode and anodesAnode. Additionally, the concentration of the electrolyteElectrolyte was meticulously controlled to prevent anodeAnode passivationPassivation, and the adjustment of the processingProcessing raw materials to regulate the impurityImpurity concentration in the electrolyteElectrolyte was also improved to maintain stable high currentCurrent density operationsOperation. As a result, a current efficiencyCurrent efficiency close to 98% was achieved at a currentCurrent density of 320 A/m2. This report outlines the improvements that have been implemented to date.