China's Alumina Cost Expected to Edge Down in October

Published: Oct 1, 2025 13:07
Source: SMM

SMM, October 1 :

The national weighted average full cost for alumina in September was approximately 3,002 yuan/ton, up 15 yuan/ton month-on-month. The weighted average cash cost was approximately 2,832 yuan/ton.

Cost Breakdown Analysis:

  • Bauxite Market: The spot price for imported bauxite from Guinea fluctuated within the range of $73 to $75 per ton throughout September, settling at an average of $74 per ton. Prices for Australian bauxite remained largely stable. Overall, cost support from the bauxite market is weakening. While domestic bauxite supply in China tightened due to factors like safety inspections and commemorative events, the impact on prices was minimal. In contrast, imported bauxite prices have begun to soften, showing a slight downward trend. This is attributed to persistently high port inventories and mounting financial pressure on alumina producers, many of whom are operating at a loss.

    Looking ahead to October, domestic bauxite supply is expected to remain constrained, though prices are forecast to be flat. For imports, shipment volumes remain sufficient. Even considering the seasonal rainy season in Guinea, no major supply shortfall is anticipated. With alumina plants maintaining high raw material inventories and buyers actively seeking price reductions to protect their margins, market sentiment continues to resist high-priced bauxite. Consequently, long-term contract prices for the fourth quarter are projected to fall compared to the previous quarter. In summary, SMM's comprehensive analysis indicates that bauxite raw material costs for alumina production are expected to trend downward. It is essential to monitor changes in port inventories and the procurement strategies of major alumina plants.

  • Caustic Soda Market: The domestic caustic soda market exhibited mixed trends in September. Long-term contract prices rose in the Shanxi, Henan, and Guangxi regions, increasing local production costs. However, prices in the key Shandong region declined.

    Entering October, the market is showing clearer signs of downward pressure. Long-term contract prices in Shanxi have decreased by 200 yuan per ton, with prices in Henan expected to follow suit with a drop of 100-200 yuan per ton. Prices in Guangxi are stable, while prices in Shandong have continued their downward trend from the previous period. The average price for October is expected to be lower than September's level. Overall, caustic soda prices are facing widespread pressure, and the cost of caustic soda for alumina production is expected to trend lower.

Overall Cost Forecast:

In summary, SMM predicts a slight decrease in the national weighted average full cost of alumina production in October. The cost is projected to operate within a range of 2,930 to 3,030 yuan per ton, with the cash cost expected to be between 2,750 and 2,850 yuan per ton.

Data Source Statement: Except for publicly available information, all other data are processed by SMM based on publicly available information, market communication, and relying on SMM‘s internal database model. They are for reference only and do not constitute decision-making recommendations.

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