AMMAN Copper Smelter Project Completed in West Sumbawa
The construction of the smelter plant in West Sumbawa Regency, West Nusa Tenggara (NTB), has been completed. The project’s completion was formalised through the signing of the Completion and Project Acceptance Certificate (PAC) between AMMAN and its strategic partner, China Nonferrous Metal Industry’s Foreign Engineering and Construction Co., Ltd. (NFC), at NFC’s headquarters in Beijing, China, on 18 July 2026.
The PAC signing marks the completion of all construction work and the resolution of punch list items related to commissioning that formed part of the contractual scope.
Although AMMAN’s copper smelter has been operating for more than a year, this achievement confirms that the smelter has successfully passed all performance guarantee tests required under the contract and has officially entered its long-term operational phase. PT Amman Mineral Internasional Tbk (AMMAN) has thereby reached a significant milestone in its business transformation.
AMMAN President Director Arief Sidarto said the project’s completion was the result of dedication and collaboration among many parties in delivering one of the world’s most advanced integrated copper smelting and precious metals refining complexes.
“The completion of this smelter project is an important achievement for AMMAN. The smelter’s operation affirms our commitment to supporting the national downstream processing agenda,” Arief said in a press statement to Media Indonesia on Friday (24/07).
He expressed hope that the policy ecosystem supporting the competitiveness of the domestic mineral processing and mining industries would continue to be strengthened, so that Indonesia can maximise the benefits of downstream processing and remain competitive amid global dynamics.
INTERNATIONAL COLLABORATION
NFC Chairman Liu Yu said the successful completion of AMMAN’s smelter project reflects strong international collaboration in supporting the development of large-scale, high-value-added mineral processing industries as a National Strategic Project (PSN).
AMMAN’s copper smelter is designed to process up to 900,000 metric tonnes of concentrate per year sourced from the Batu Hijau mine and, in the future, the Elang mine.
The integrated complex will produce high-quality copper cathode, gold, silver, sulphuric acid and selenium — key inputs for various sectors underpinning economic growth and the global energy transition.
From renewable energy and electric mobility to digital technology and high-tech manufacturing, these products will contribute to meeting the world’s growing demand for critical minerals.
By integrating the latest processing technologies and world-class environmental management systems, the facility is designed to achieve optimal metal recovery rates, higher energy efficiency, robust operational reliability, and sustainable, responsible resource management.
This achievement marks the beginning of a new phase for AMMAN as a company integrated from mining through to mineral processing. The smelter’s presence also strengthens the national downstream processing ecosystem and enhances the added value of Indonesian minerals in the global market.