AMMAN’s Copper Processing Innovation Gains Global Recognition
Tue 02 Jun 2026, 16:26 PM
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An innovative copper-processing solution developed by AMMAN in Sumbawa, utilizing Controlled Potential Sulfidisation (CPS) technology combined with Oxidation Reduction Potential (ORP) sensors, has received international recognition. Didit and his colleagues from the Metallurgy team at the Batu Hijau processing plant have continuously sought innovative ways to enhance value creation in mining operations. Their drive for improvement stems from the positive workplace culture fostered by PT Amman Mineral Nusa Tenggara (AMMAN), one of Indonesia’s largest copper and gold mining companies.
Drawing on their technical expertise, the team focused on improving copper recovery rates. Higher recovery means a greater proportion of copper contained in mineral ore can be converted into concentrate products, while reducing the amount lost to tailings.
The ore processed at Batu Hijau may come either directly from mining operations or from stockpiles—ore that has been previously mined and stored for future production requirements. Processing stockpiled ore presents a particular challenge because prolonged exposure to the environment causes oxidation, which can reduce copper recovery rates when the material is processed through the flotation plant. If left unaddressed, declining recovery levels can gradually erode the economic value of stockpiled ore over time.
Driven by a commitment to continuous improvement, Didit and his colleagues developed an innovative solution to address this issue through the implementation of Controlled Potential Sulfidisation (CPS) enhanced by Oxidation Reduction Potential (ORP) sensor technology.
The innovation significantly increased copper recovery rates. Notably, the improved performance was achieved while reducing chemical consumption by as much as 18.3 percent. The result represents a tangible example of more efficient and productive operations, where technology optimizes resource utilization while lowering operating costs.
Precision and Consistency Behind CPS Technology
Controlled Potential Sulfidisation (CPS) is a process designed to enhance the flotation performance of copper-bearing minerals, enabling them to be separated and recovered more effectively. The AMMAN Metallurgy team integrated Oxidation Reduction Potential (ORP) sensor technology to monitor the chemical condition of processing slurry in real time. The system provides more accurate operational data, allowing metallurgists to precisely control the dosage of sodium hydrosulfide (NaHS), the activating reagent added to the slurry.
Much like seasoning in cooking, the reagent must be added in the correct amount. With precise dosing, copper minerals that were previously difficult to recover become more readily recoverable during flotation. Flotation is the process by which copper- or gold-bearing minerals attach to air bubbles and rise to the surface, allowing them to be separated from waste material.
International Recognition
The success of the innovation was documented in a technical paper presented in Adelaide, Australia, at one of the mineral processing industry's most prestigious metallurgical conferences, where global experts gather to exchange knowledge and best practices in mineral plant design and operations.
Representing AMMAN, Didit and his colleagues received significant recognition when their paper was awarded the conference’s “Best Paper” honor. The achievement demonstrates that innovation originating from Sumbawa and developed by local Indonesian talent is capable of competing and being recognized at the international level.
As a native of West Sumbawa, Didit said the innovation was made possible by an environment that actively encourages improvement and creativity. “At AMMAN, we are constantly encouraged to keep improving and never become complacent. A highly supportive work culture, strong teamwork, and leadership support were all key factors behind this innovation. The company provides broad opportunities for us to continue innovating and developing the most effective systems. For me, this is proof that local talent from West Sumbawa can produce technical achievements that earn global recognition,” Didit said.
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