CNMC expands stake in Kazakh copper mine as concentrate tightness reshapes smelter strategy

CNMC

CNMC expands stake in Kazakh copper mine as Chinese groups chase upstream security. CNMC expands stake in Kazakh copper mine by raising ownership in SM Minerals to 70%. As a result, CNMC strengthens its access to feedstock for a tightening copper concentrate market.

CNMC plans to spend $89mn to buy an additional 55% stake in SM Minerals. The company will control the Benkala copper mine Kazakhstan rights after the transaction closes. Meanwhile, SM Minerals holds mining rights at Benkala North and prospecting rights at Benkala South.

Benkala project scale targets 45,000 t/yr copper concentrate output

Benkala copper mine Kazakhstan holds large tonnage at moderate grade. Benkala North resources total 384mn tonnes of ore with 1.58mn tonnes of contained copper. Therefore, CNMC can develop a long-life open-pit asset suited to steady concentrate production.

CNMC plans a 14mn t/yr mining and processing project. The plan targets about 45,000 t/yr of copper in concentrate. Construction could start in 2027, with production planned for 2029.

Why upstream stakes matter as TC/RCs fall toward zero

Copper concentrate market tightness is now reshaping smelter economics. Benchmark TC/RC terms for 2026 have reportedly dropped to $0/t and 0¢/lb. As a result, smelters must lean harder on by-product credits and secure supply.

CNMC expands stake in Kazakh copper mine to improve negotiating power in term contracts. Equity copper can offset exposure to spot concentrate premiums and delivery risk. Meanwhile, market participants expect a 650,000–850,000t concentrate shortfall in 2026.

The shift also signals a broader trend in China’s copper supply chain. Integrated players can tolerate lower TCs by balancing mine returns against smelter margins. Therefore, standalone smelters may face more volatility through the next cycle.

The Metalnomist Commentary

This investment reads as a structural response to a concentrate squeeze, not a one-off deal. However, Benkala’s 2029 start date means execution risk stays high. The winners will pair project delivery with disciplined smelter cost control.