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The recovery of the scandium (Sc) by-product from low-grade lateritic ore in Taganito HPALHigh-Pressure Acid Leaching (HPAL) NickelNickel Corporation (THPAL) using the existing and universal high-pressure acid leachHigh pressure acid leach (HPALHigh-Pressure Acid Leaching (HPAL)) technologyTechnology presents a strategic and innovative way for global competitiveness and for adding value, and scaling the global supplySupply for Sc as one of the critical minerals needed for achieving carbon neutrality. THPAL operates HPALHigh-Pressure Acid Leaching (HPAL) Plant in the Philippines and processes a low-grade lateritic nickelNickel ore, which was once considered mining waste. With design capacity of 30,000 t-Ni, the hydrometallurgical processing plantProcessing plant, produces an intermediate main product of nickelNickel/cobaltCobalt mixed sulfideMixed sulfide. Since the start of commercial operation in 2013, THPAL has achieved operating milestone not only in attaining the rated productionProductions but also in terms of initiating continuous improvement. To increase global competitiveness, THPAL has leveraged the effectiveness of HPALHigh-Pressure Acid Leaching (HPAL) technologyTechnology combined with new advanced technologyTechnology, leading to the recovery of Sc and chromite (Cr) as a by-product. Sc is a rare earth element and a critical mineral needed for carbon neutrality. Sc is mainly used in solid oxide fuel cells, a high-efficiency renewable energy technologyTechnology that creates electricity and contributes to the reduction of greenhouse gas emissionGreenhouse gas emissions. Another forward-looking application of Sc is as an alloying agent for aluminum (Al-Sc alloy), which can be used in the aerospace industry. While the current market demandDemand for Sc is relatively small and not wide, its potential in renewable energy technologiesTechnology like solid oxide fuel cells is significant. On the other hand, chromite is used as a raw material for stainless steel and other specialty steels after smeltingSmelting and processingProcessing into ferrochrome, an intermediate product, and is in wide demandDemand of the world. THPAL’s ability to provide a stable supplySupply of Sc and Cr could support advancements in carbon–neutral technologiesTechnology and help in achieving sustainabilitySustainability goals. The recovery of scandium and chromite from low-grade laterite oreLaterite ore further enhances the value of HPALHigh-Pressure Acid Leaching (HPAL) technologyTechnology. In the presentation, how THPAL leverages the effectiveness of existing HPALHigh-Pressure Acid Leaching (HPAL) technologyTechnology by integrating it with new advanced technologyTechnology to recover by-product will be explained.

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Efficient Recovery of Valuable Scandium and Chromite By-Product from Low-Grade Lateritic Ore: Taganito HPAL Nickel Corporation’s Strategy to Add Value to High-Pressure Acid Leach Technology

  • 会议论文

  • 发表日期：

    2025年

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  • Bonafe Karen O. Amador,
  • Takashi Miyamoto,
  • Tomohiko Yokogawa,
  • Yohei Yamaguchi

摘要

The recovery of the scandium (Sc) by-product from low-grade lateritic ore in Taganito HPALHigh-Pressure Acid Leaching (HPAL) NickelNickel Corporation (THPAL) using the existing and universal high-pressure acid leachHigh pressure acid leach (HPALHigh-Pressure Acid Leaching (HPAL)) technologyTechnology presents a strategic and innovative way for global competitiveness and for adding value, and scaling the global supplySupply for Sc as one of the critical minerals needed for achieving carbon neutrality. THPAL operates HPALHigh-Pressure Acid Leaching (HPAL) Plant in the Philippines and processes a low-grade lateritic nickelNickel ore, which was once considered mining waste. With design capacity of 30,000 t-Ni, the hydrometallurgical processing plantProcessing plant, produces an intermediate main product of nickelNickel/cobaltCobalt mixed sulfideMixed sulfide. Since the start of commercial operation in 2013, THPAL has achieved operating milestone not only in attaining the rated productionProductions but also in terms of initiating continuous improvement. To increase global competitiveness, THPAL has leveraged the effectiveness of HPALHigh-Pressure Acid Leaching (HPAL) technologyTechnology combined with new advanced technologyTechnology, leading to the recovery of Sc and chromite (Cr) as a by-product. Sc is a rare earth element and a critical mineral needed for carbon neutrality. Sc is mainly used in solid oxide fuel cells, a high-efficiency renewable energy technologyTechnology that creates electricity and contributes to the reduction of greenhouse gas emissionGreenhouse gas emissions. Another forward-looking application of Sc is as an alloying agent for aluminum (Al-Sc alloy), which can be used in the aerospace industry. While the current market demandDemand for Sc is relatively small and not wide, its potential in renewable energy technologiesTechnology like solid oxide fuel cells is significant. On the other hand, chromite is used as a raw material for stainless steel and other specialty steels after smeltingSmelting and processingProcessing into ferrochrome, an intermediate product, and is in wide demandDemand of the world. THPAL’s ability to provide a stable supplySupply of Sc and Cr could support advancements in carbon–neutral technologiesTechnology and help in achieving sustainabilitySustainability goals. The recovery of scandium and chromite from low-grade laterite oreLaterite ore further enhances the value of HPALHigh-Pressure Acid Leaching (HPAL) technologyTechnology. In the presentation, how THPAL leverages the effectiveness of existing HPALHigh-Pressure Acid Leaching (HPAL) technologyTechnology by integrating it with new advanced technologyTechnology to recover by-product will be explained.