Zinc Hits $3,610 as Concentrate Tightness Refuses to Ease

LME zinc breached $3,610 per tonne on July 24, extending a rally that began in late June and has added nearly $400/t in six weeks. The driver is not demand — it is the accelerating collapse of the concentrate market. Zinc treatment charges, the fee smelters earn for converting concentrate into refined metal, have fallen to levels that make production uneconomic for a growing number of operators. The signal is unambiguous: there is not enough zinc concentrate to go around.

Spot TCs for Chinese smelters fell to $35-70 per dry metric tonne in Q2 2026, down from $105-120 in Q1 and $180-200 a year ago. The China Zinc Smelters Purchasing Team (CZSPT), which coordinates import buying for major Chinese smelters, lowered its Q3 guidance to $30-50/t — a range that implies further deterioration. At these levels, a smelter buying concentrate on the spot market loses roughly $150-200 on every tonne of zinc it produces, before power and labor costs. The only reason smelters continue operating is that shutting down and restarting is even more expensive.

Two supply shocks in May 2026 tightened an already-strained market. A furnace explosion at Kazzinc's Ust-Kamenogorsk smelter in Kazakhstan removed approximately 50,000 tonnes of annual refined capacity — roughly 0.4% of global production. Within two weeks, a fire at Nexa Resources' Cajamarquilla smelter in Peru, one of the largest zinc refineries in the Americas at 340,000 tonnes annual capacity, took another 30,000 tonnes offline temporarily. Neither incident caused permanent damage, but the combined disruption removed metal from a market that had no spare capacity to absorb it.

The benchmark annual treatment charge — negotiated between Teck Resources and Korea Zinc — settled at $85/t for 2026, up slightly from the all-time low of $80/t in 2025 but still historically depressed. The benchmark is supposed to reflect the balance between concentrate supply and smelter demand. At $85, it signals that mine output is inadequate. The benchmark also includes price participation — smelters earn a bonus when zinc prices rise above a certain threshold — but with spot TCs at less than half the benchmark, the annual contract is effectively a subsidy for smelters that cannot access spot concentrate at any price.

European smelting capacity remains fragile. The continent's zinc smelters — representing roughly 2.3 million tonnes of annual capacity or 16% of the global total — were decimated by the 2021-22 energy crisis. Nyrstar's Budel and Balen smelters operated at reduced rates. Glencore's Nordenham smelter restarted only in late 2025 after nearly three years offline. European power prices have moderated from the 2022 peak, but at €75-85/MWh they are still double pre-2021 levels. The marginal European zinc smelter needs LME prices above $3,200/t to break even — which means current prices leave room, but not much.

On the demand side, zinc is the most galvanized-steel-dependent of the base metals. Roughly 60% of zinc consumption goes into galvanizing — coating steel to prevent rust. Global steel production rose 1.2% year-on-year through May 2026, led by India (+5.8%) and offsetting declines in China (-0.7%). Construction steel demand is the swing factor: infrastructure spending in India, Southeast Asia, and the Middle East supports zinc demand, while China's property sector remains a drag. Automotive galvanizing demand is growing at 2-3% annually as carmakers increase the share of galvanized steel per vehicle for corrosion warranty compliance.

LME zinc inventories fell 12,300 tonnes in the week ending July 18 to 198,500 tonnes, with cancelled warrants at 28,400 tonnes or 14.3% of the total. The drawdown has been consistent: stocks are down 82,000 tonnes from the March peak of 280,500. Shanghai Futures Exchange zinc stocks tell the same story — down to 108,000 tonnes from 162,000 in April. The combined visible inventory draw across both exchanges is approximately 135,000 tonnes in three months.

Analyst views diverge on sustainability. Those who see zinc retreating argue that the current price is driven by temporary smelter disruptions (Kazzinc, Nexa) and that Chinese smelters will eventually cut production, freeing up concentrate and depressing TCs further — but simultaneously reducing refined supply and supporting prices. Those who see zinc staying elevated argue that the concentrate deficit is structural: global zinc mine output grew only 1.1% in 2025 and is forecast at 1.8% in 2026, while demand grows at 2-2.5%. The math implies deficits for at least two more years. JP Morgan expects zinc to average $3,400-3,500/t for the remainder of 2026. ING is more cautious at $3,200, citing macro risk.

What makes zinc different from copper or aluminum is the speed at which smelter dynamics can flip the market. Unlike copper, where the concentrate deficit takes years to resolve through mine investment, zinc mine supply is more elastic — mines in Peru, Bolivia, and Australia can ramp relatively quickly. The question is whether they will. Zinc mine margins at current prices are extraordinarily high: a typical zinc mine with co-product credits from lead and silver has an all-in sustaining cost of $1,800-2,200/t and is selling zinc at $3,600. The incentive to produce is enormous. The constraint is permitting and development timelines, not economics.

Physical premiums in Europe have risen to $180-210/t, up from $140-160 in Q1, reflecting the concentrate-to-refined bottleneck. US special high-grade zinc premiums are at $0.11-0.13/lb ($240-285/t), near multi-year highs. The premium structure tells you the refined market is tight even before you look at exchange stocks. Buyers who normally source from European smelters are being told to expect 10-15% volume reductions on 2027 contracts as smelters prioritize margin over volume.