Where does zinc come from?

Zinc is mined as sulfide ore, concentrated at the mine and smelted somewhere else, so the mine map and the metal map differ. On this page zinc production means mined zinc measured by its metal content, unless refined or slab zinc is named. In 2025 China mined 4.1 million tonnes, 32% of the world's 13 million tonnes (USGS MCS). Peru followed at 12%, then Australia at 8.5%, India at 6.7% and Mexico at 6%. Countries outside the 10 listed separately produced 19% of the total, and world mine output changed +9% from the previous year.

The geology is mostly sedimentary. The largest deposits are sediment-hosted, formed where hot brines carrying zinc and lead vented onto an oxygen-poor sea floor and precipitated layer upon layer of sphalerite and galena, which were then folded and buried. Australia's Mount Isa, McArthur River and Century, Alaska's Red Dog and the Broken Hill orebody in New South Wales are of this kind, and so are many Chinese and Irish deposits. A second family, Mississippi Valley type, sits in limestone where cooler brines replaced carbonate rock, giving the smaller, higher-grade mines of the American midcontinent and Tennessee. A third comes from volcanogenic massive sulfide lenses, the source of much of the zinc in Peru, Canada, Sweden and Spain. In all three, zinc travels with lead, silver and often copper, so few mines produce zinc alone and the by-product credits shape which ones stay open.

Reserves, meaning the part of identified deposits that could be mined economically at the time of the estimate, were 240 million tonnes in 2025. Australia held 27%, China 25% and Russia 12% (USGS MCS). Zinc reserves have a habit of being replaced faster than they are consumed, because deep extensions of known orebodies are cheaper to prove than new discoveries; the constraint on supply is usually the cost of building a mine rather than the absence of ore.

Zinc crosses borders twice. Concentrate (HS 2608) is a grey powder of roughly half zinc by weight, shipped in bulk from mines to smelters; in 2024 Peru was the largest exporter with 16% of a trade worth $12.3 billion, ahead of Australia and United States, and China took 35% of imports (CEPII BACI). Slab zinc (HS 7901) is the refined metal, cast into ingots and jumbo blocks. In 2024 Spain led exports of unwrought zinc (HS 7901) with 9.8% of the world's $14.7 billion, followed by South Korea and Australia, while United States was the largest importer at 12%.

The two tables name different industries. Concentrate exporters are mining countries in the Andes, Australia and North America. Slab exporters are smelting countries: Spain, South Korea, Canada, Belgium, Japan, Kazakhstan and Finland, several of which mine little or no zinc and run on imported concentrate. The largest concentrate importer is also the largest miner, which is what happens when smelting capacity is built faster than mines. Importers of slab zinc are galvanizing economies, with steel mills and coating lines rather than furnaces.

The benchmark is the London Metal Exchange zinc contract, ticker ZS, traded in 25 t lots quoted in US$/t and settled by delivery of special high grade zinc, which is at least 99.995% zinc, into an LME warehouse. The exchange quotes a cash price for delivery in two days and a three-month price, and the spread between them reveals whether nearby metal is tight or abundant. The Shanghai Futures Exchange lists a yuan contract for the Chinese market. Physical buyers pay the exchange price plus a regional premium covering freight, financing, credit and local scarcity, and those premiums for Europe, the United States and Asia are quoted separately and can move independently of the exchange.

The series charted here is LME cash, special high grade. In August 2026 it averaged $3,875/t, up 39% from a year earlier (World Bank Pink Sheet). The highest monthly average was $4,405/t in December 2006; adjusted for US inflation the real high was $11,502/t in May 1974, and the lowest monthly average since the series began in 1960 was $177/t in September 1962. The gap between the nominal and real records is a reminder that zinc's true peak came in the inflationary 1970s, not in the commodity boom of the 2000s.

Mines do not receive the exchange price. A smelter buys concentrate at the zinc value of the contained metal minus a treatment charge, quoted in dollars per dry metric tonne of concentrate and negotiated annually between large miners and smelters, with spot charges for the rest. The treatment charge is the smelter's gross margin, and it moves inversely with concentrate availability: when mines expand faster than smelters, charges rise and smelting is profitable; when smelting capacity outgrows mine supply, charges fall toward zero and smelters cut runs, which tightens the metal market a few months later. Concentrate contracts also carry deductions for the unpaid portion of the contained zinc, credits for silver and gold, and penalties for iron, silica, arsenic and other impurities.

Galvanized steel is the reason zinc has a market, and galvanizing serves construction above all: roofing, cladding, framing, guardrails, transmission towers, rebar and structural sections. Zinc demand therefore tracks steel production and, within it, the share of steel that gets coated. Chinese property completions, infrastructure spending, European and North American non-residential building and the pace of transmission-grid construction are the visible drivers. Automotive body panels are the second galvanizing market and follow vehicle production.

The treatment charge that smelters earn for converting concentrate into metal is the clearest signal in the zinc market. It is negotiated annually between the largest miners and smelters and traded on a spot basis alongside. When mine supply grows faster than smelting capacity, charges rise; when smelters outbid each other for scarce concentrate, charges fall toward zero and smelters lose money on every tonne. Sustained low charges lead to production cuts, which show up as tighter refined metal months later.

Zinc mines are unusually short-lived because sediment-hosted orebodies are mined out rather than deepened indefinitely. A cluster of large mines reaching the end of their reserves within a few years, as happened in the middle of the 2010s, removes a measurable share of world concentrate supply and lifts prices until replacements are built. New mines take the better part of a decade to permit and construct, so the industry runs in long cycles of depletion and rebuilding rather than responding smoothly to price.

Electrolytic zinc smelting is one of the most power-hungry metallurgical processes in use, so power prices set the marginal cost of refined metal in Europe in particular. When wholesale electricity prices rise faster than the metal price, smelters curtail or idle, and the metal market tightens even while mines keep producing concentrate. The reverse also holds: cheap captive power, whether hydroelectric or coal-fired, is why smelting has migrated toward Asia.

Zinc is stored cheaply and financed easily, so a large share of visible metal can sit in warehouses under financing arrangements rather than being available to consumers. Falling exchange stocks and a backwardated forward curve, where the cash price exceeds the three-month price, signal genuine scarcity; rising stocks with a wide contango signal the opposite. Because a few holders can control much of the deliverable metal, the exchange applies lending rules that limit how far a dominant position can squeeze the spreads.

High zinc prices push buyers toward thinner coatings, toward aluminum-zinc alloy coatings that use less zinc per square meter, and toward aluminum or plastic in die-cast parts and plumbing. None of these substitutions is fast, and all of them are hard to reverse. The other side of the ledger is that galvanizing is cheap insurance against rust, so demand is fairly insensitive to the metal price in the short run: zinc is a small fraction of the cost of a coated steel structure.

Most zinc comes from mines that also produce lead and silver, so a mine's decision to run at full rate depends on all three prices. A strong silver price can keep a low-grade zinc mine open, and a weak one can close it, which decouples zinc supply from the zinc price. The same linkage means that a shock to lead or silver, from a smelter closure or a policy change, can show up as a change in zinc concentrate availability.

Zinc ore is almost always sphalerite, a zinc sulfide, mined underground or in large open pits and usually accompanied by galena, the lead sulfide, and by silver. The ore is crushed, ground and separated by froth flotation, which is run in stages so that a lead concentrate is floated first and a zinc concentrate second. The zinc concentrate holds roughly half its weight in zinc, along with iron, sulfur and traces of cadmium, germanium, indium and gallium that are recovered later as by-products; those minor metals come almost entirely from zinc smelting rather than from mines of their own.

Nearly all refined zinc is now made by the roast-leach-electrowin route. Concentrate is roasted in a fluid bed at high temperature, which converts the sulfide to zinc oxide, called calcine, and drives off sulfur dioxide that is captured and turned into sulfuric acid; a large smelter is also a large acid plant, and acid sales matter to its economics. The calcine is leached in dilute sulfuric acid, the solution is purified with zinc dust to drop out copper, cadmium and cobalt, and the purified solution is electrowon: zinc plates onto aluminum cathodes over a day or two, is stripped, melted and cast into special high grade ingots. A smaller share of output still comes from the older pyrometallurgical route, in which calcine is reduced with coke in an imperial smelting furnace that produces lead and zinc together.

Secondary zinc is recovered from the dust that electric arc furnaces generate when they melt galvanized scrap steel. That dust is treated in Waelz kilns to make a crude zinc oxide, which is then refined into metal. As the share of steel made from scrap rises, so does the volume of zinc circulating through this route, and it now supplies a meaningful part of refined production without any mining at all.

Galvanizing is the dominant use. Zinc protects steel in two ways at once: it forms a durable barrier, and because it is more reactive than iron it corrodes preferentially, so a scratch in the coating does not start rust underneath. The International Lead and Zinc Study Group put galvanizing at 60% of world zinc use in 2023, far ahead of zinc alloys at 15%, zinc compounds at 11%, brass and bronze at 9% and semi-manufactured products at 4% (ILZSG, World Zinc Factbook 2024). Read by end use rather than by first use, construction takes half of all zinc, transport a fifth and infrastructure most of the rest. Hot-dip galvanizing, in which steel is dipped in a molten zinc bath, coats structural steel, sheet and wire; continuous galvanizing lines coat coil for car bodies and appliances; electrogalvanizing gives a thinner, smoother finish for visible panels.

The remainder splits between brass and bronze, which are copper-zinc and copper-tin alloys used for fittings, valves and instruments; zinc die-casting alloys, which melt at low temperature and reproduce fine detail, used for locks, hardware and automotive components; rolled zinc for roofing and gutters, especially in Europe; and zinc oxide, which goes into rubber compounding, ceramics, paints, sunscreens and animal feed. Zinc is also an essential dietary micronutrient, and zinc-based batteries remain the standard alkaline cell.

Mining is spread across the Andes, Australia, China, India, Mexico and central Asia; smelting is concentrated in China, South Korea, India, Japan, Canada and a shrinking European cluster. Concentrate therefore moves in bulk carriers from Callao and Antofagasta, from Townsville, Karumba and Darwin, and from the seasonal Arctic shipping window at Red Dog, to smelters in Asia and Europe. China imported 35% of world zinc concentrate in 2024 (CEPII BACI), which is why Chinese smelter margins are the single most watched variable in the concentrate market.

Refined metal flows the other way. Spain, South Korea and Australia led exports of slab zinc in 2024 (CEPII BACI), and United States was the largest importer at 12%, feeding galvanizing lines rather than furnaces. LME warehouses in Singapore, Malaysia, the Netherlands and the United States hold the stocks that settle the contract, and the pattern of deliveries into and out of them is a market signal in its own right.

The fragile links are smelters, not mines. A zinc smelter cannot be throttled cheaply: the electrolysis cells must stay warm, so operators either run or shut down properly, and restarting takes months. That makes the fleet vulnerable to power price spikes, to environmental enforcement and to sudden losses of concentrate supply. Europe's smelters have proved the most exposed, curtailing repeatedly when wholesale power prices rose. On the mine side, single large operations carry an outsized share of concentrate: the Alaskan Arctic mine that ships only in the ice-free months, and the largest Australian and Peruvian operations, each move world balances when they stumble.