Sulfuric acid, a crucial chemical in copper and nickel processing, is becoming cheaper, and that could bring some relief to copper smelters that have been hit by unusually harsh fees. Research firm CRU forecasts that acid delivered to Chile, the world's largest copper producer, will fall to $215 per metric ton by the fourth quarter of 2027, down from a record high of $451 earlier this year.
The decline is expected to ease the treatment charges that smelters pay to convert copper ore into metal. These charges have been deeply negative, meaning smelters have been paying more to process ore than they receive in fees—a rare and painful situation for the industry.
Why sulfuric acid matters for copper
Sulfuric acid is a key input in the leaching process used to extract copper from oxide ores, and it's also used in smelting operations. For many smelters, acid is one of the largest operating costs, so its price directly affects their profitability. When acid prices spike, as they did earlier this year, smelters face a double squeeze: they pay more for a critical input while also receiving less for their processing services.
The record acid price of $451 per metric ton was driven by a combination of factors, including supply disruptions and strong demand from other industries. But CRU analyst Chris Lawson, speaking at a seminar during London Metal Exchange Week, said acid prices should keep sliding next year, offering smelters some relief even if costs remain above long-term averages.
Chile is a key market for acid because of its massive copper mining industry. The country produces about a quarter of the world's copper, and much of it relies on acid-intensive processing methods. So the price of acid delivered to Chile is a bellwether for the global market.
What this means for copper prices and investors
For everyday investors, the cooling of acid prices is a positive sign for copper miners and smelters, as it could improve their margins. Lower input costs may also help stabilize copper supply, which has been under pressure from various disruptions. Copper prices have been volatile recently, with factors like US stockpile changes and analyst forecasts influencing the market.
The easing of treatment charges could also encourage smelters to increase production, which might help meet growing demand for copper in renewable energy and electric vehicles. However, the relief is not immediate—the forecast is for a gradual decline over the next few years, and costs are still expected to stay above historical norms.
Investors should watch how acid prices evolve and how smelters respond. If the trend continues, it could support copper supply and potentially temper price spikes. But the market remains sensitive to broader economic conditions, such as global growth concerns and energy costs.
Broader context and what to watch
The copper industry has faced a series of challenges, from operational disruptions at major mines to fluctuating demand. The drop in acid prices is a welcome development, but it's just one piece of the puzzle. Smelters also contend with energy costs, labor issues, and environmental regulations.
CRU's forecast suggests that the worst of the acid price spike may be over, but the path to normalcy could be slow. For investors, this means keeping an eye on quarterly earnings reports from major copper producers and smelters, as well as any updates on treatment charge negotiations.
While the news is positive for the industry, it's important to remember that commodity markets are cyclical. What goes down can go back up, and the acid market could tighten again if supply disruptions recur or demand from other sectors rebounds. As always, diversification and a long-term perspective are key for investors navigating the ups and downs of the commodities space.
