Cobalt sulfate (battery grade)

Major diversified mining and commodities trading company; produces sulfuric acid as byproduct at its copper, zinc, and lead smelters globally (Australia, Canada, Kazakhstan, South Africa, Philippines, Peru, etc.). One of the world's largest merchants of sulfuric acid from smelting operations. Also one of the world's largest sulfur traders — trades recovered sulfur from refineries and intermediates it to fertilizer manufacturers. Glencore's dual position as a smelter byproduct H2SO4 producer AND sulfur trader gives it market intelligence across both supply sources.

Overtook Glencore as single-largest cobalt miner via Tenke Fungurume mine (DRC) in 2023; ~15% of global cobalt mine supply from TFM alone.

Huayou Cobalt Co., Ltd. (Quzhou, Zhejiang Province; SZSE: 603799; ~¥60B+ revenue) is the world's largest producer of battery-grade cobalt sulfate — estimated 25-30% of global CoSO4 supply. Huayou controls the full cobalt value chain: mining and concentrating cobalt ore in the DRC through its Mikas and Huacobalt DRC subsidiaries (Katanga Province, near Kolwezi), shipping cobalt hydroxide intermediates to Quzhou, refining to cobalt sulfate at the Quzhou facility (capacity ~70,000 tonnes cobalt content annually across all cobalt products), and selling to NMC cathode precursor manufacturers in China, Japan, and South Korea. Huayou is CATL's primary cobalt sulfate supplier. In 2021-2023, Huayou aggressively expanded upstream DRC cobalt hydroxide capacity and downstream cathode precursor (PCAM) production, integrating vertically from mine to precursor. Huayou's Quzhou facility is the single largest cobalt chemical refinery in the world. The company is listed on the Shenzhen Stock Exchange and is partially state-aligned via CIC (China Investment Corporation) linkages.

Eurasian Resources Group S.a.r.l. (ERG; HQ Luxembourg; privately held; owned by Kazakhstani investors including the ENRC predecessor group) is a diversified natural resources company and the operator of Metalkol RTR (Roan Tailings Reclamation) in Kolwezi, DRC — described as the world's second-largest standalone cobalt producer by volume. Metalkol processes historical tailings (mine waste dumps) from the Kolwezi Tailings project, with nameplate capacity of approximately 23,000 tonnes of cobalt in hydroxide and 100,000 tonnes of copper cathode annually; it achieved design cobalt capacity in 2021. ERG markets Metalkol cobalt hydroxide to Western battery manufacturers (including a 3,000 tpa IRA-compliant supply agreement signed 2024 with Electra Battery Materials, Canada) as a conflict-mineral-free alternative to ASM-contaminated cobalt. The Metalkol RTR facility has completed the Responsible Minerals Assurance Process (RMAP), making ERG one of the few DRC cobalt suppliers that can document chain-of-custody compliance.