An Introduction to Zinc Markets
A complete, beginner-friendly map of how zinc is mined, smelted, traded, financed, and priced - and who does each part
This is meant to stand on its own as a first introduction to the zinc market as a whole. It assumes no prior knowledge and builds in order: first the physical metal and the chain of businesses that handle it, then the units and contracts the market is quoted in, then the financial market layered on top, then the participants and the desks that operate it, and finally the forces - cycles, geopolitics, history - that move the whole thing. Read it top to bottom the first time; later sections lean on earlier vocabulary. It is a structural explainer, not a price call.
The whole market in one paragraph. Zinc is the metal that stops steel from rusting. Around half of all zinc goes into galvanizing - coating steel for construction, cars, and infrastructure - so zinc demand is essentially a bet on the industries that build with steel. It is mined as a sulphide ore (sphalerite), concentrated near the mine, then smelted and refined into 99.995% metal, with that refining step heavily concentrated in China (about half of world capacity). Zinc has a distinctive two-layer market: mined concentrate and refined metal are priced separately and joined by the treatment charge, the fee a miner pays a smelter to turn concentrate into metal - and that charge is one of the most closely watched signals in the whole complex. On top of the physical chain sits a financial market on three exchanges (London, the US, Shanghai), where producers and consumers hedge their price risk and traders profit from gaps in time, place, and form. Because mines are slow to build and finite, and because smelting is energy-intensive and China-dominated, zinc's price is driven as much by where the bottleneck sits - mine or smelter - as by the raw balance of supply and demand. UPSTREA M - MINE & CO NCENTRATE
Zinc mining
sphalerite ore, often under 15% Zn
Milling & concentrate ~50-55% Zn concentrate
priced as the LME price minus the treatment charge (TC)
MIDSTREA M - SMELT & REFINE
Smelting & refining
SHG 99.995% metal; China ~half of capacity
DO W NSTREA M - FA BRICATE & USE
Fabrication / first use
galvanizing, alloys, brass, chemicals
End use
construction ~50%, transport ~20%
The zinc value chain: from orebody to end use. Concentrate and refined metal price separately, joined by the treatment charge; secondary metal re-enters at the smelter.
secondary metal ~13% (EAF dust, Waelz oxide)
By-products
sulphuric acid; Ge, In, Cd, Ag
What zinc is and why its market exists
Zinc (chemical symbol Zn, atomic number 30) is a bluish-white metal with a low melting point of about 420 degrees C. It is the 23rd most abundant element in the Earth's crust and the fourth mostused metal in the world, after iron, aluminium, and copper. Its defining property is that it corrodes in place of steel. When zinc coats steel and the surface is scratched, the zinc oxidises preferentially and the steel underneath is spared; this sacrificial, or galvanic, protection is why a thin zinc layer can extend the life of a steel structure by decades. Protecting steel from rust is zinc's principal use and the reason the market exists at the scale it does. Where the demand comes from, roughly in order: galvanizing is by far the largest first use, taking around half of all zinc; then zinc-base die-casting alloys (the Zamak family, used for hardware, automotive and consumer parts) and brass and bronze (zinc alloyed with copper); then rolled zinc (roofing, gutters, facades) and zinc chemicals (zinc oxide for tyres, paints, sunscreen and agriculture). Viewed by end-use sector rather than by product, construction takes roughly half of zinc, transport about a fifth, and the rest goes to infrastructure, industrial machinery and consumer goods. An average car contains around 17 to 18 kg of zinc. That demand profile matters. Copper is the conductor metal, so its demand leans on electronics and electrification; zinc is the steel-protection metal, so its demand leans on construction and autos through galvanized steel. Zinc is cyclical, but it is a building-and-manufacturing cycle, and like the rest of the base-metals complex it is dominated by China, which consumes roughly half of the world's zinc.
The zinc value chain (the physical spine)
Mining. Zinc comes mostly from sphalerite (zinc sulphide), usually in mixed sulphide orebodies that also contain lead, often copper, and valuable trace metals - silver, germanium, indium, gallium, cadmium and others. Ore grades are low, frequently a few per cent up to around 15% zinc, so a large tonnage of rock yields a modest tonnage of metal. Zinc is mined in more than 50 countries; China, Peru, Australia, the United States, Mexico, India and Bolivia lead, and China alone accounts for about a third of mine output. World mine production runs in the region of 12 to 13 million tonnes of contained zinc a year; it peaked near 13.6 million tonnes in 2015 and has fluctuated in the 12 to 13 million tonne range since. Concentration. At the mine, ore is crushed and floated into a concentrate of roughly 50 to 55% zinc. This concentrate, not the raw ore, is what trades between mines and smelters. Smelting and refining. Two routes dominate: the electrolytic route (roast the concentrate, leach it, then electrowin the metal), which accounts for most output, and the older pyrometallurgical (Imperial Smelting) route. The product is Special High Grade zinc at 99.995% purity. Smelting is energy-intensive - the electrowinning step is a heavy electricity user - and it throws off sulphuric acid as a major by-product, along with recovered minor metals. Refining is even more concentrated than mining: China holds roughly half of world smelting capacity and output, followed at a distance by Korea, India, Japan, Spain and Canada. The treatment charge. Because concentrate and refined metal are separate products, the smelter is paid a fee - the treatment charge, quoted in dollars per tonne of concentrate - to convert one into the other. In effect the miner receives the LME metal price minus that charge (and minus small refining losses, plus credits for recovered by-product metals). The treatment charge is the smelter's main source of income and the market's tightness gauge: it falls when concentrate is scarce, because
smelters compete for limited feed and accept thinner fees, and it rises when concentrate is plentiful. More on this in Sections 4 and 8. Fabrication and end use. Refined metal goes to galvanizers (continuous hot-dip lines at steel mills, general hot-dip galvanizers, and electro-galvanizing), die-casters, brass mills, rolled-zinc makers and chemical producers, and from there into buildings, vehicles, infrastructure and goods. Recycling. Zinc is recyclable, but the recycled share is lower than for aluminium or copper. About 13% of refined zinc is produced from secondary (recycled) material, mainly electric-arc-furnace (EAF) dust and Waelz oxide, plus galvanizing residues. Beyond that refined route, more zinc is recycled directly, for example by re-melting zinc sheet, die-castings and brass, so the total recycled content of zinc supply is higher (broad estimates put it near 30%). But the figure that competes with primary smelters - secondary refined metal - is about 13%. The reason recycling is modest is structural: much zinc is dispersed thinly as a coating on steel and is recovered as a by-product of steel recycling (it volatilises into EAF dust) rather than collected as zinc in its own right.
How zinc is measured and quoted (units, grades, contracts)
Units. Concentrate is priced and traded by the tonne of contained zinc; refined metal by the metric tonne. The exchange price is quoted in US dollars per tonne; the North American physical market often quotes cents per pound. Grades. The benchmark refined product is Special High Grade (SHG) zinc, a minimum of 99.995% zinc, which is the grade deliverable against the exchange. Slightly lower grades exist for specific applications, but SHG is the market reference. Contracts. The London Metal Exchange zinc contract (code ZS) is for 25 tonnes of SHG zinc, priced in dollars per tonne, physically deliverable from LME-approved warehouses, with the LME's characteristic date structure (daily prompt dates out to three months, then weekly and monthly dates further out). Smaller five-tonne, cash-settled LMEmini contracts exist for wider access. The CME (COMEX) also lists a 25-tonne zinc contract priced in dollars per tonne, and the Shanghai Futures Exchange runs the Chinese benchmark in renminbi. Premiums. The exchange price is for metal sitting in an approved warehouse. Physical buyers pay a premium on top for delivery to a specific place and in a specific form - for example an SHG premium at the port of Antwerp or a US delivered premium. Premiums are a separate and sensitive gauge of regional physical tightness; they exploded during the 2022 European energy crisis even as the flat price was already at records.
The financial market (layered on top of the physical)
Three exchanges. The LME is the global benchmark (dollars per tonne, backed by physical warehouses) and the reference for physical contracts worldwide; the CME/COMEX serves the US; the Shanghai Futures Exchange is the Chinese benchmark in renminbi. Producers and consumers use these to hedge, and traders to take positions. The curve. Contango (later-dated futures priced above nearer ones) is the normal state and roughly reflects the cost of storing and financing metal; backwardation (near-dated above later) signals near-term scarcity. Zinc has swung hard between the two during tight episodes. Warehouses and warrants. LME-registered metal sits in approved warehouses on warrants, the documents that convey ownership. On-warrant stock is available to the market; cancelled warrants
are metal earmarked for withdrawal. A key feature of zinc is that visible exchange stocks are small relative to the market - at times only a fraction of a per cent of annual consumption (around 51,000 tonnes at the end of 2019, roughly 0.4% of output) - which makes the price sensitive to inventory swings and to drawdowns. Treatment charges as a pricing layer. Benchmark treatment charges are set annually and spot treatment charges are assessed continuously by price-reporting agencies (often quoted cif China). They are not exchange-traded, but they are the concentrate market's price and are watched as closely as the flat price, because they reveal whether the bottleneck is at the mine or the smelter.
Who's in the market (a participant taxonomy)
Miners. A mix of diversified majors and zinc-focused producers. Glencore is the largest zinc miner by capacity; others include Hindustan Zinc (Vedanta), Teck Resources, Nexa, Zijin, Boliden, MMG, Industrias Penoles and Sumitomo (Minera San Cristobal). The world's largest single zinc mine is Teck's Red Dog in northwest Alaska, which supplies roughly 5% of global mine output, although it is mature, its grades are declining, and its output is expected to fade over the coming years unless nearby deposits extend its life. Smelters. Often separate companies from the miners. Korea Zinc, whose Onsan plant is in South Korea, is the world's largest zinc smelter; Nyrstar, controlled by the trading house Trafigura, is Europe's largest; Teck's Trail operation in Canada is one of the largest integrated zinc-and-lead smelters; Hindustan Zinc and Boliden are significant; and a very large Chinese smelting sector sits behind all of them, holding about half of world capacity. Trading houses. Glencore, Trafigura, Mercuria and others move concentrate and metal, finance producers, operate or use warehouses, and arbitrage location, time and form. Trafigura's control of Nyrstar is the clearest example of a trader integrating directly into smelting. Fabricators and consumers. Galvanizing lines (often inside or beside steel mills), die-casters, brass mills, automakers and construction-product makers. These are the natural short-hedgers: they own future demand and want to fix their input cost. The data ecosystem. The International Lead and Zinc Study Group (ILZSG), a UN-affiliated body, publishes the standard supply-and-demand statistics; the US Geological Survey (USGS) publishes mine production and reserves; and consultancies such as CRU, Wood Mackenzie and Fastmarkets provide concentrate balances, treatment-charge assessments and cost curves.
Trading desks and hedge funds (the operating seats)
Bank base-metals desks. These run flow and market-making (quoting LME zinc and its options), structuring (tailored hedges and financing for producers and consumers), and index or financing business. Zinc is one of the LME's most liquid contracts after aluminium and copper, so it supports a genuine derivatives market. Merchant and trading-house desks. These run the physical book (concentrate and metal), arbitrage (location premiums, the LME-versus-Shanghai gap, contango financing) and increasingly the byproduct angle, since germanium and indium credits can swing the economics of a concentrate. Their edge is information drawn from physical flows and storage. Funds. Macro and systematic (CTA) funds trade zinc as part of the base-metals complex, often through the LME or index exposure; relative-value desks trade zinc against lead, its geological
twin, or against the rest of the base-metals pack. Canonical zinc trades, by way of illustration rather than advice: first, the concentrate-tightness trade - positioning for treatment charges and the flat price when mines close or restart; second, the smelter-bottleneck trade - long metal or tight spreads when smelters curtail for energy or maintenance reasons even while mines keep running; third, the location and premium arbitrage LME versus Shanghai, or physical premiums versus the exchange; and fourth, the cycle trade - long into construction and restocking upswings, short into the oversupply that arrives as new mines ramp.
How everything interacts (the causal chain)
Walk the chain. An orebody is found and slowly built into a mine; ore is milled into concentrate; the concentrate is sold to a smelter under a treatment charge; the smelter refines it into Special High Grade metal and recovers sulphuric acid and by-product metals; the metal is sold to fabricators mostly galvanizers - at the exchange price plus a physical premium; galvanized steel and zinc parts go into buildings, cars and infrastructure; and end-of-life steel is recycled in electric-arc furnaces, where the zinc volatilises into dust, some of which is recovered as secondary zinc. Two layers, two balances. There is a concentrate market (mines versus smelters, signalled by the treatment charge) and a refined-metal market (smelters versus fabricators, signalled by the flat price, the spreads and the premiums). The two can diverge. In 2023 to 2025, mined supply recovered while several smelters outside China curtailed, so the concentrate market eased even as refined metal stayed relatively tight - which is exactly why treatment charges sat at multi-decade lows while the flat price held up. The China pivot. Because China refines roughly half the world's zinc and consumes roughly half of it, Chinese smelter run-rates, the country's appetite for imported concentrate, and its construction demand move the entire market. The gap between LME and Shanghai prices, and the economics of importing metal into China, gauge how hard China is pulling.
Reading a balance correctly
The headline numbers. The ILZSG reports world refined production, refined consumption, the resulting surplus or deficit, and mine production. Refined output runs around 13.5 to 14 million tonnes a year and set a record near 13.89 million tonnes in 2021. Forecasts versus outturn. Balances are revised heavily, so read them with care. 2024 finished in deficit, by about 164,000 tonnes. For 2025, the ILZSG forecast a modest surplus (about 85,000 tonnes in its October 2025 round), but its preliminary full-year data, released in early 2026, showed the market actually ending in a small deficit of about 33,000 tonnes: Chinese refined output rose strongly (around 6%) while output outside China fell (around 1.6%) on smelter disruptions, even as mined output rebounded by roughly 5%. For 2026 the group projects a sizeable surplus (on the order of 270,000 tonnes) as concentrate availability improves and new smelter capacity ramps up. The lesson is to read the direction of change and its source - mine or smelter - not just the sign of the balance. Where the bottleneck sits. A zinc shortage can be a concentrate shortage, in which case treatment charges crash and the mines hold the whip; or a metal shortage, in which case premiums and spreads blow out and the smelters hold it. The two have different trades and different cures.
Inventory caveats. Visible LME and Shanghai stocks are small and can be drawn down quickly, and unreported Chinese and producer inventory clouds the true picture. Inventory moves are therefore a better real-time signal than the absolute level.
Prices, cycles, and the long arc
The cycle. Zinc is mine-supply-driven and notoriously cyclical. Orebodies are lumpy and finite they deplete - so a handful of large closures or restarts can swing the balance. High prices choke demand and spur new mines and restarts; that new supply, arriving with a lag, creates gluts that crash prices and force closures, which tightens the next cycle. Reference points. Zinc was the best-performing LME metal in 2016 after the Century mine in Australia and the Lisheen mine in Ireland closed; it spiked to a record 4,896 dollars per tonne intraday in March 2022 (eclipsing the 2006 peak of 4,580 dollars), then traded mostly in a 2,400 to 3,400 dollar range through 2024 to 2026. The cash cost of many non-Chinese mines is around 2,400 to 2,500 dollars per tonne, which acts as a rough floor: below it, mines cut and supply tightens. The long arc. Demand has risen steadily with global construction and industrialisation, and almost all of the growth since the 2000s has come from Asia, and from China in particular - China went from roughly 8% of world zinc usage in 2000 to about half today. The structural questions now are how far Chinese construction demand matures, how costly European smelting becomes, and whether mine supply can keep pace as long-lived mines such as Red Dog deplete.
Geopolitics and strategic dimensions
The dug-here, refined-there gap. Zinc is mined widely but refined narrowly. The metal comes out of the ground in the Americas, Australia and elsewhere, but about half of it is processed in China - the same structural vulnerability seen in copper, and even more pronounced on the smelter side. Energy and Europe. Smelting is electricity-intensive, so European smelters are exposed to power prices. The 2021 to 2022 energy crisis forced major European curtailments (Nyrstar cut output; Glencore's Portovesme smelter in Italy went onto care and maintenance) and raised a longer-term question over the viability of European zinc smelting at high power costs. Critical minerals and by-products. Zinc concentrate carries germanium, gallium and indium, metalloids critical to semiconductors, optics and displays. China's export curbs on germanium and gallium have made these by-products strategically charged; zinc sits on the US critical-minerals list partly for this reason, and new projects increasingly value the by-product credits, not just the zinc itself. Red Dog's germanium, for example, is recovered at Teck's Trail smelter in Canada. Corporate control. Control of large smelting assets has itself become a strategic contest. Korea Zinc the world's largest zinc smelter and the company that, with Teck, sets the annual benchmark treatment charge - has been the subject of a year-plus battle for control, between an alliance of Young Poong and the private-equity firm MBK Partners and the founding Choi family, since September 2024. The fight has since become entangled with a plan for a large US strategic-minerals smelter in which the US government would take a stake. It is a vivid illustration of how strategically important refining capacity has become.
A short history and its cautionary tales
The basics are old. Zinc has been smelted in India and China for centuries and alloyed with copper into brass since antiquity; industrial-scale galvanizing dates to the nineteenth century.
2006 to 2007. A China-led boom pushed zinc to a then-record 4,580 dollars per tonne on a supply shortage. 2015 to 2016. Mine production peaked, and then the Century and Lisheen closures, together with Glencore curtailments, cut supply hard - making zinc the best-performing base metal of 2016. 2018 to 2019. Nyrstar, Europe's largest zinc smelter, had over-expanded at the 2011 supercycle peak; a 2018 profit warning triggered a debt crisis, and the trading house Trafigura - already its main supplier, customer and financier - took majority control (about 98%) in July 2019, all but wiping out minority shareholders. It is a cautionary tale about leverage at the top of a cycle, and about how a financier can end up owning the asset it lends to. 2021 to 2022. The European energy crisis curtailed smelters and drove record physical premiums and the 4,896 dollar spike - a spike amplified by the chaos in the LME nickel contract during the same week in March 2022. 2023 to 2025. A wave of mine cuts created a concentrate deficit that crushed treatment charges to multi-decade lows; the 2025 benchmark of 80 dollars per tonne was the lowest in roughly 50 years, with spot charges briefly turning negative. Then mine supply rebounded while smelters lagged. The recurring themes: supply is lumpy and finite, smelting is the energy-and-China-constrained bottleneck, and the treatment charge is the early-warning gauge.
What to watch: a starter dashboard
Treatment charges, benchmark and spot. The cleanest read on concentrate tightness. Falling charges mean scarce concentrate (miners winning); rising charges mean plentiful concentrate (smelters winning). The ILZSG balance and its revisions. Watch the direction and the source of the change - mine versus smelter - more than the headline sign. LME and Shanghai stocks and spreads. Small inventories and backwardation flag metal tightness; the gap between LME and Shanghai flags how hard China is pulling. Physical premiums. The SHG premium at Antwerp and US delivered premiums show regional metal scarcity, Europe especially. Smelter status. European energy costs, Chinese run-rates and new capacity, and major outages all move the metal balance. The mine pipeline. Large closures, restarts and ramp-ups - and the depletion clock on giants such as Red Dog. China construction and steel. The dominant demand driver for galvanized steel. By-product and critical-minerals policy. Germanium, gallium and indium export rules and prices increasingly feed back into zinc project economics.
How to think about the outlook and the major players
The frame. Zinc is a steel-protection metal with a two-layer market and a China-dominated, energyexposed smelting bottleneck. Demand is steady but tied to construction and autos; supply is lumpy, finite, and increasingly constrained at the smelter rather than the mine.
The mine side. After the 2023 to 2024 concentrate squeeze, mined supply is recovering - new and restarted mines such as Kipushi in the Democratic Republic of Congo, Ozernoye in Russia and Tara in Ireland are adding output - which should lift treatment charges off their lows and, all else equal, ease the concentrate market. The smelter side. This is the swing factor. Chinese capacity keeps growing, while smelting outside China, especially in Europe, is squeezed by energy costs and closures. Whether the metal market is tight or loose depends largely on smelter run-rates, which is why recent surplus forecasts hinge on new capacity actually ramping. The players to know. Miners: Glencore, Hindustan Zinc, Teck, Nexa, Boliden. Smelters: Korea Zinc, Nyrstar (Trafigura), Teck's Trail, and the Chinese sector. Trading houses Glencore and Trafigura span both. The standard data sources are the ILZSG and the USGS. Bottom line. To read zinc, watch where the bottleneck sits. Track the treatment charge for the concentrate layer and stocks, spreads and premiums for the metal layer; keep an eye on Chinese smelting and construction; and remember that the by-products carried in the concentrate are increasingly part of the story.
Glossary (quick reference) Backwardation - near-dated futures priced above later ones; signals near-term tightness. Cancelled warrants - exchange metal earmarked for withdrawal from the warehouse system. Concentrate - milled, floated ore of roughly 50-55% zinc; the smelter's feedstock and the form that trades between mines and smelters. Contango - later-dated futures priced above nearer ones; the normal state, reflecting storage and financing. Die-casting / Zamak - casting of zinc-base alloys (zinc with aluminium, magnesium, copper) into precision parts. EAF dust - zinc-bearing dust captured when scrap steel is recycled in electric-arc furnaces; a key secondary raw material. Galvanizing - coating steel with zinc for corrosion protection; the largest single use of zinc. ILZSG - International Lead and Zinc Study Group; the standard source for supply-and-demand balances. LME / COMEX / SHFE - the London, US and Shanghai exchanges; the LME is the global benchmark in dollars per tonne. On-warrant stock - exchange metal available to the market (as opposed to cancelled). Premium - the extra paid over the exchange price for metal delivered to a specific place and form (e.g. the Antwerp SHG premium). RLE route - roast-leach-electrowin; the dominant electrolytic smelting-and-refining process for zinc. Sacrificial (galvanic) protection - zinc corroding in place of the steel it coats, sparing the steel. Secondary zinc - refined zinc made from recycled material; about 13% of refined output. SHG - Special High Grade zinc, minimum 99.995% purity; the LME-deliverable standard. Sphalerite - zinc sulphide; the dominant zinc ore mineral. Treatment charge (TC) - the fee, in dollars per tonne of concentrate, that a miner pays a smelter to convert concentrate into metal; the smelter's main income and the concentrate market's tightness gauge.
Waelz oxide - a zinc-rich oxide produced (in a Waelz kiln) from EAF dust and other secondary materials, fed back into smelters. Structural primer. The mechanics - how mining, smelting, the curve, the treatment charge and the desks work are stable; the specific figures and the current outlook move and should be checked against live sources before use. Headline figures here reflect the most recent full-year data available as of mid-2026 (ILZSG and USGS), with reference years stated where they matter.