Copper demand tailwind: Dowa’s Gresik smelter expansion targets Indonesia’s EV boom

Edited by ad hoc news B2B & Pro Desk. Reviewed before publication on 06/16/2026 at 2:02 AM ET. Details in the imprint.

Dowa Holdings is doubling down on the copper supply chain with a capacity upgrade at its Gresik copper smelter and refinery in Indonesia, positioning the facility to serve rising demand from electric vehicles, grid expansion and renewable-energy projects in Asia. The Gresik plant, located in East Java and operated together with Indonesian partners, focuses on processing copper concentrate into cathodes and precious-metal byproducts, and the planned expansion is designed to increase throughput while improving metal recovery from complex ores.

What Dowa’s Gresik copper smelter actually does

The Gresik copper smelter and refinery is part of the larger Gresik Smelter & Refinery complex that treats copper concentrates shipped from mines in Indonesia and overseas, producing high-purity copper cathodes that meet London Metal Exchange-grade specifications for use in power cables, motors and electronic components. According to Dowa’s corporate materials, the company participates in smelting operations at Gresik alongside Indonesian state-owned and international partners, using a flash smelting furnace, anode furnaces and an electrorefining circuit to turn concentrate into 99.99 percent copper cathodes, while also recovering gold, silver and other valuable metals from the same feedstock. Dowa’s English annual report describes copper smelting and refining as a core segment of its nonferrous metals business.

In practical terms, copper concentrate arriving at Gresik is dried and fed into the smelter where it is oxidized at high temperature, producing blister copper that is then cast into anodes for electrorefining. These anodes enter large electrolyte tanks, where copper ions are plated onto starter sheets to form cathodes while impurities either fall away as anode slime or remain dissolved in the electrolyte; the anode slime is then treated in a precious-metals plant to recover gold, silver, platinum-group metals and selenium. Industry data on Indonesian copper smelting points to Gresik as one of the country’s main downstream processing hubs, supporting Indonesia’s policy of adding value to domestic mineral resources before export and enabling supply of refined copper to local cable makers, electronics suppliers and infrastructure projects.

Dowa’s smelting business, including its interest in the Gresik smelter, is closely integrated with the group’s recycling and environmental-management operations, allowing it to blend traditional copper concentrate with secondary raw materials such as electronic scrap and industrial residues where permitted. This integration gives the company more flexibility on feedstock sourcing and supports higher overall recovery of copper and associated metals, which is particularly relevant as mining companies increasingly supply complex, impurity-rich concentrates that are more challenging to process. The same process expertise can be applied when handling impurity elements like arsenic, antimony and bismuth, which have to be controlled to meet product specifications and environmental standards.

While Gresik’s copper cathodes serve as a basic industrial material, their importance is magnified by the global shift toward electrification: each electric vehicle requires several times more copper than a comparable internal-combustion car, and renewable-energy systems like wind farms and solar plants depend on large volumes of copper for turbines, transformers and grid connections. In Southeast Asia, where power demand and EV adoption are growing from a relatively low base, Indonesia’s position as both a producer of copper concentrates and a host to refining capacity gives facilities such as Gresik a strategic role in regional supply chains. For Dowa, the smelting business also provides a stable offtake channel for concentrates and recycled materials, complementing its other nonferrous-metal operations in Japan and abroad.

The current expansion program at Gresik aims to lift smelting and refining capacity while upgrading environmental-control systems to comply with tighter regulations on sulfur dioxide and dust emissions, reflecting a broader trend in the smelter industry toward cleaner production. Public statements from Indonesian authorities and project participants indicate that the overall Gresik complex is being scaled up in phases, with additional capacity expected to come online in the second half of this decade, aligning with government goals to increase domestic processing of copper and other critical minerals. Information published by PT Freeport Indonesia on the Gresik smelter complex highlights ongoing construction to expand refining capacity in East Java.

For industrial customers, the Gresik smelter’s output matters less in terms of branding and more in terms of reliability, purity and logistics. Copper cathodes from the plant are typically shipped in standardized bundles and can be drawn into wire, rolled into strip or cast into rods and other semi-fabricated shapes by downstream manufacturers in Indonesia and export markets in Asia. The ability to source LME-grade cathodes from within Indonesia reduces dependence on imported refined copper, shortens lead times for local buyers and can mitigate currency and freight volatility compared with sourcing from distant smelters, especially when shipping rates are elevated.

Indonesia’s government has made the build-out of domestic smelting and refining capacity a cornerstone of its mineral policy to capture more value from natural resources, and the Gresik copper smelter is one of the most prominent examples in the copper segment. Dowa’s participation in this project supports the company’s strategy of expanding its overseas smelting footprint and diversifying earnings away from the domestic Japanese market, while creating opportunities to integrate more recycled materials over time as scrap availability in Southeast Asia increases. Reporting by regional business media has underscored how new and expanded smelters in Indonesia, including those in Gresik, are expected to change trade flows by reducing exports of copper concentrate and increasing exports of refined copper and finished copper products. Nikkei Asia has detailed Indonesia’s policy push for more copper smelters in places like Gresik to increase value-added exports.

Within Dowa’s portfolio, copper smelting and refining sits in its Nonferrous Metals segment alongside zinc, precious metals and recycling businesses, providing both processing capacity and market access for a range of raw materials and secondary feedstocks. The Gresik project gives Dowa a foothold in a key resource-producing country and a way to align with customers in sectors such as automotive, power infrastructure and electronics that depend on secure copper supply. Shares of Dowa Holdings (ISIN JP3449200009) closed on the Tokyo Stock Exchange at JPY 4,895 on 06/16/2026.

This article was a.i.-assisted and editorially reviewed. Product information without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Trading involves risk up to and including the total loss of invested capital.