When Smelters Start Paying for Zinc: What the Mine Squeeze Really Means

By Siam Sukkhee Trading Co., Ltd — 2026-07-10 — zinc ingot supply demand

I saw the Bloomberg alert in June. Treatment charges on imported zinc concentrate had collapsed to minus $50 a tonne.

That's a record low, more or less, going back ten years of data.

When smelters pay miners rather than the other way around, something upstream has broken. Not bent. Broken.

Here's what happened: mine output fell off, and there simply isn't enough concentrate to feed the smelters anymore. Chinese smelters especially are in a bind now. They're keeping the lights on mostly through byproduct credits—silver recovery, sulfuric acid sales, that sort of thing. Strip those away and half of them would be walking already. According to Fastmarkets' mid-2026 analysis, that's where the economics sit.

The mine-side picture explains everything. Red Dog in Alaska, run by Teck Resources, dropped 9 per cent on zinc output in Q1 2026 down to about 106,000 tonnes. Lower-grade ore entering the mill. Teck revised annual guidance down from 410,000-460,000 tonnes to 375,000-415,000 tonnes. That's not a minor adjustment.

Antamina in Peru is running lower too through 2028, actually, that's not quite right—it's not running lower overall, the mine plan is shifting toward copper-only ore, which means zinc output drops off the map entirely for certain periods. Australia's Cannington is depleting. Sweden's Garpenberg is down year on year. New capacity in the DRC and parts of China is coming online, but it won't be enough to plug the hole.

The International Lead and Zinc Study Group is forecasting a 19,000-tonne refined zinc deficit for 2026. Demand rising 1.3 per cent to 14 million tonnes against production that can only reach 13.99 million.

Sounds manageable. It isn't.

The real pressure is upstream in the concentrate pipeline, and minus $50 per tonne treatment charges are the market's bluntest statement about that. Refined zinc prices haven't collapsed the way soft downstream demand would normally suggest. That's because smelters can't source enough concentrate. Throughput falls. Refined metal output gets capped even when fabrication demand is weak. The mine squeeze is acting as a floor, and demand isn't lifting it.

If you're running a galvanizing operation or tracking zinc ingot supply, the concentrate market is your better indicator right now than the LME spot price sitting on screens. Treatment charge data tends to work through to refined availability over a quarter or two as smelter run-rates adjust to what feedstock they can actually grab.

New supply is trickling in. Huoshaoyun mine in China. Modest growth from the DRC and Portugal. But global mine expansion is staying well below what would ease smelter competition for feedstock through the rest of 2026.

Negative treatment charges are specific. They're telling you something exact. The stress in this market isn't sitting in refined metal warehouses waiting for demand to pick up or on fabrication shop floors gathering dust. It's at the mine gate. It's been building for months. Chinese smelters have restructured around those byproduct credits just to stay operational. The mine development pipeline will need time to correct that situation, and one year probably won't be enough.

If Red Dog and Antamina don't recover output in the second half, the ILZSG's deficit estimate is likely understated.

Tags: zinc treatment charges, Teck Resources, Antamina, negative zinc treatment charges 2026, zinc concentrate supply shortage smelters, zinc ingot supply deficit forecast