Benchmark research · 对标研究 · 2026 → 2050

Light metal,
heavy carbon

轻金属，重碳排

Aluminium is the material we ask to be light, endless and cheap all at once. Making it releases roughly 1.1 billion tonnes of CO₂e a year — about 2% of everything humanity emits. This page is not an investment report. It is a benchmark: what is genuinely on track to 2035 and 2050, what is quietly off track, and where capital is actually earning its return.

铝，是我们同时要求它轻、耐久又便宜的金属。而生产它每年排放约 11 亿吨二氧化碳当量，约占全球排放的 2%。这不是一份投资报告，而是一次对标研究：面向 2035 与 2050，哪些真正在轨道上，哪些正在悄悄脱轨，以及资金在哪里真正赚到了回报。

13 Al Aluminium 铝 26.982 u
660 °C melt · 960 °C pot
Recyclable without limit
The shape of the problem · 问题的形状
1.1Gt
CO₂e per year, sector-wide全行业年排放（IAI, 2022）
2%
of global emissions占全球总排放
16t/t
Global average, primary metal原铝全球平均碳强度
60%
of that footprint is electricity其中约六成来自电力
5%
Energy to recycle vs. make new再生铝能耗仅为原铝的约 5%
Read this first · 先读这里

Why, what, how to judge

为什么 · 是什么 · 如何判断

Three lenses. Without them, every “green aluminium” claim looks identical.
三个视角。没有它们，所有“绿色铝”听起来都一样。

Why

为什么重要

Aluminium demand is projected to grow around 80% by 2050 — EV bodies, transmission conductors, solar frames, packaging, buildings. It is the enabler metal of the energy transition, which means its footprint compounds into everyone else's. Decarbonising aluminium is not one sector's housekeeping; it is a multiplier on the entire clean-tech supply chain.

到 2050 年铝需求预计增长约 80%——电动车车身、输电导体、光伏边框、包装、建筑。它是能源转型的“使能金属”，因此它的碳足迹会叠加进所有其他行业。为铝脱碳，不是一个行业的内务，而是整条清洁技术供应链的乘数。

What

要改什么
  1. Smelting electricity ≈ 60% — 15 MWh per tonne. The single biggest pool. 电解电力，每吨约 15 兆瓦时。
  2. Alumina refining heat ≈ 15–20% — steam and calcination, today mostly coal and gas. 氧化铝精炼的蒸汽与焙烧热。
  3. The carbon anode ≈ 1.5–1.7 t CO₂/t — chemistry, not fuel. No clean electron removes it. 碳阳极本身的化学排放。
  4. Mining, transport, bauxite residue — the rest, plus the social licence. 采矿、运输与赤泥，以及社会许可。

How

如何判断真伪
  1. Location-based or market-based power? Unbundled certificates on a coal grid are the sector's biggest greenwash vector. 电力核算用地理法还是市场法？
  2. Is the boundary cradle-to-gate? Bauxite → alumina → anode → ingot, or just the smelter? 边界是否覆盖全流程？
  3. Additionality. New clean capacity, or an existing dam relabelled? 是新增清洁电力，还是既有水电换标签？
  4. Verified by whom? ASI certification, ISO 14067 product carbon footprint, third-party audit. 由谁核证？
The roadmap · 路线图

Two decades, two different jobs

两个十年，两件完全不同的事

The first decade deploys technology that already exists. The second replaces the chemistry itself.
第一阶段部署已成熟的技术，第二阶段更换化学反应本身。

2026 — 2035
Deploy what already works
部署已经可行的技术：电力、循环与市场机制
  • Power

    Move smelting from ~30% to 50%+ low-carbon electricity. Long-tenor firmed PPAs, hydro, nuclear, and round-the-clock renewables. Retrofit pot lines for ±20% load modulation so a smelter becomes a grid asset instead of a grid problem.电解用电的低碳比例从约 30% 提升至 50% 以上；长期“可调度”绿电协议；电解槽负荷可调 ±20%，让电解厂成为电网资产而非负担。

  • Coal

    No new unabated coal-fired smelting. Anywhere. The coal-powered fleet built between 2005 and 2015 is the sector's hardest asset to move — repower it or plan its retirement now, because a smelter built today runs to 2065.全球不再新建无减排措施的燃煤电解产能；2005–2015 年建成的燃煤机组必须换电源或立刻规划退役——今天新建的电解厂要运行到 2065 年。

  • Refining

    Electrify alumina heat. Mechanical vapour recompression, electric boilers and electric calcination cut refinery energy by roughly 25–35% with proven equipment.氧化铝精炼热能电气化：机械蒸汽再压缩、电锅炉、电焙烧，可降低约 25–35% 的能耗，设备已成熟。

  • Process

    Kill the PFCs. Perfluorocarbons from anode effects are thousands of times more potent than CO₂ and are eliminated by better cell control — the cheapest tonne of abatement in the entire industry.消除阳极效应产生的全氟化碳：其温室效应是 CO₂ 的数千倍，仅靠更好的槽控就能消除，是全行业最便宜的减排。

  • Circular

    Double scrap sorting capacity and end downcycling. LIBS and XRF sorting, twin-chamber melters, alloy-to-alloy loops. Every tonne of wrought scrap that falls into a cast alloy is a tonne of quality lost forever.再生铝分选能力翻倍，终结降级利用：LIBS/XRF 分选、双室熔炉、同合金闭环。每一吨变形铝废料掉进铸造合金，就是永久损失的品质。

  • Market

    Build the plumbing that pays for the rest. EU CBAM's definitive regime from 2026, aluminium smelting inside China's national ETS, harmonised product carbon footprints, ASI certification, and a genuinely traded low-carbon contract.建设为其余环节买单的市场基础设施：2026 年欧盟 CBAM 正式实施、铝电解纳入中国全国碳市场、统一的产品碳足迹方法、ASI 认证、真实可交易的低碳铝合约。

Checkpoint 2035: roughly half of the sector's total abatement has to be banked by then. The 2040s cannot carry a decade of delay. 2035 检查点：全行业约一半的减排量必须在此之前完成，2040 年代承载不了推迟十年的欠账。

No power purchase agreement can remove the carbon anode. Only new chemistry can.

没有任何一份绿电协议能消除碳阳极——只有新的电化学可以。

2035 — 2050
Change the chemistry
更换化学反应本身：惰性阳极、氢基路线与循环主导
  • Anode

    Inert anodes at commercial fleet scale. ELYSIS (Rio Tinto + Alcoa) and peers replace the consumable carbon anode with a non-consumable one: the cell emits oxygen instead of CO₂, removing ~1.5 t CO₂ per tonne of metal.惰性阳极实现商业化规模：以不消耗的阳极取代碳阳极，电解槽排出氧气而非 CO₂，每吨铝减少约 1.5 吨直接排放。

  • H₂

    A second chemistry, not a single bet. Chloride and hydrogen-based routes such as Hydro's HalZero, plus hydrogen or electric calcination in refining. Redundancy matters when one pathway slips.保留第二条技术路线：氯化物/氢基路线（如 Hydro 的 HalZero），以及氢能或电焙烧的氧化铝工艺。一条路线滞后时，冗余才是安全。

  • Loop

    Recycled metal supplies more than half of demand. Primary aluminium becomes a premium input reserved for what scrap genuinely cannot do — not the default.再生铝供应超过总需求的一半；原铝回归为“废料无法替代时”的高端投入，而不再是默认选项。

  • Residue

    Turn 4.6 billion tonnes of bauxite residue into a resource. Iron, gallium, scandium, cement feedstock — or it remains the industry's largest unowned liability.把全球约 46 亿吨堆存赤泥变成资源：铁、镓、钪、水泥原料——否则它将继续是全行业最大的无主负债。

  • Residual

    CCS only on what is truly left. Refinery calciners and anode baking, after electrification and efficiency have taken everything they can. Carbon capture is the last tool, not the first excuse.碳捕集只用于真正的残余排放（焙烧炉、阳极焙烧），且必须在电气化与能效之后。CCS 是最后的工具，不是最先的借口。

Target 2050: around 2 t CO₂e per tonne and roughly 250 Mt CO₂e sector-wide — while producing about 80% more metal than today. 2050 目标：吨铝碳强度降至约 2 吨 CO₂e、全行业约 2.5 亿吨 CO₂e，同时产量比今天高出约 80%。
By region · 分区域视角

Same metal, six different physics

同一种金属，六种完全不同的现实条件

Where the electrons come from decides almost everything.
电从哪里来，几乎决定了一切。

≈ 59% of world primary output

China

中国

The 45 Mt capacity ceiling holds. Millions of tonnes have relocated from coal provinces to Yunnan hydropower — the largest single capital reallocation the sector has ever made. Aluminium smelting is now inside the national ETS, and recycled aluminium is being scaled as policy, not sentiment.

WatchDry-season hydrology can turn “green” tonnes brown in a single year; coal backup and footprint methodology need transparency. 枯水期风险与碳足迹核算方法的透明度。
≈ ⅓ of smelting idled since 2021

Europe

欧洲

The best recycling base and the strongest demand-side pull in the world, paired with the worst power economics. CBAM's definitive regime from 2026 puts a border price on embedded carbon. The open question is whether idled primary capacity restarts or leaves permanently.

WatchIndustrial electricity price, not technology, is the binding constraint. 制约因素是工业电价，而非技术。
Hydro-rich, policy-volatile

North America

北美

Québec and British Columbia hydro give some of the lowest-carbon primary metal on earth. The ELYSIS industrial demonstration sits here, and the first new US primary smelter in ~45 years is being developed with federal support under the industrial demonstrations programme.

WatchCredit and grant continuity across political cycles. 政策与补贴的跨周期连续性。
Cheapest solar on earth

Middle East

中东

EGA has sold solar-powered aluminium since 2021, drawn from Dubai's large-scale solar park; Ma'aden continues to expand in Saudi Arabia. Export-oriented and therefore directly CBAM-exposed — which makes low-carbon credentials a commercial asset, not a report chapter.

WatchSolar is daytime; smelters are 24/7. Firming is the real cost. 光伏是白天的，电解是全天候的——调峰成本才是关键。
Fastest demand growth

India

印度

Around 20 t CO₂e per tonne on captive coal — among the highest intensities in the world, attached to the fastest-growing demand. Round-the-clock renewable PPAs and pumped storage are the entire game. A domestic carbon market (CCTS) begins its compliance phase this decade.

WatchCaptive coal plants are owned assets; retirement economics are political. 自备电厂是自有资产，退役是政治经济学问题。
The new-build risk zone

SE Asia & Africa

东南亚与非洲

Indonesia's new coal-powered smelting capacity is the single largest source of new locked-in emissions in the sector. Guinea supplies a growing share of world bauxite; Mozal in Mozambique runs on hydro. What is built in the next five years sets the 2060 baseline.

Watch40-year assets being financed on 5-year commodity logic. 用五年的商品周期逻辑，去融资四十年的资产。
Emerging areas & return signal · 新兴投资领域与回报信号

Where the money actually works

资金真正起作用的地方

Indicative ranges, drawn from public company disclosures and sector studies. Directional — verify at the source before you act on any of it.
以下为指示性区间，来源为公开披露与行业研究。方向性参考，使用前请回溯原始来源核实。

Scrap sorting & closed-loop recycling

废铝分选与闭环再生

LIBS/XRF sorting lines, twin-chamber melters, alloy-to-alloy contracts with automotive and packaging. Recycling uses about 5% of primary energy for the same metal.

Capex
Low – medium
Payback
≈ 2–4 years
Signal
Best risk-adjusted return in the sector
Confidence
High

Firmed clean power & long-tenor PPAs

可调度清洁电力与长期购电协议

The 60% lever. Hydro, nuclear, round-the-clock renewables plus storage, contracted for 15–25 years so a smelter can be financed against it.

Capex
Very high (grid-scale)
Payback
Utility horizon, 10–20 yrs
Signal
Infrastructure-like returns plus a price hedge
Confidence
High

Smelter flexibility retrofit

电解槽柔性调节改造

Heat-exchange retrofits let pot lines modulate load without damaging the cells — turning the world's most inflexible load into a demand-response asset.

Capex
Low
Payback
≈ 3–5 years
Signal
Grid-services revenue in volatile power markets
Confidence
High

Alumina refinery electrification

氧化铝精炼电气化

Mechanical vapour recompression, electric boilers, electric calcination. Proven equipment, unproven at full refinery scale in most regions.

Capex
Medium – high
Payback
≈ 4–8 years, spread-dependent
Signal
Wholly dependent on the fuel-vs-power price spread
Confidence
Medium

Inert anode & non-carbon chemistry

惰性阳极与非碳化学路线

ELYSIS, HalZero and peers. The only lever that removes process emissions. Licensing and JV structures, not merchant plants, are the realistic entry.

Capex
Very high, decade horizon
Payback
Beyond 2035
Signal
Option value; needs carbon > US$100/t or a durable premium
Confidence
Medium

Carbon-differentiated market infrastructure

碳差异化市场基础设施

Product carbon footprint data, certification, verified low-carbon trading venues. Near-zero capital, and it is what makes every other line item bankable.

Capex
Near zero
Payback
Immediate margin capture
Signal
Highest ROI per dollar, smallest absolute abatement
Confidence
High

Bauxite residue valorisation

赤泥资源化

Iron, gallium, scandium and cement feedstock recovered from red mud. Strategic-minerals upside attached to the industry's biggest environmental liability.

Capex
Medium
Payback
Unproven at scale
Signal
Venture-stage; value depends on critical-minerals pricing
Confidence
Low – Med

A deliberate omission. Published estimates of the sector's total capital need to 2050 range from roughly US$0.5 to 1.5 trillion and are not comparable — they differ on whether the power system sits inside the boundary. The absence of one agreed figure is itself a call-out, not a detail.
刻意保留的空白：关于全行业到 2050 年的总资本需求，公开估算从约 5,000 亿到 1.5 万亿美元不等，且彼此不可比——差别在于是否把电力系统纳入边界。没有一个公认口径，本身就是需要点名的问题。

Who moves first · 谁先动了

Capital and conviction

资本与信念：谁在投，谁在买

Money for good only compounds when someone on the other side commits to buy.
向善的资本只有在另一端有人承诺采购时，才会真正复利增长。

Putting capital to work

正在投入资本的一方
  • ELYSIS — Rio Tinto + Alcoa joint ventureFormed 2018 with investment from Apple and the Governments of Canada and Québec; industrial-scale inert anode demonstration in Québec. The sector's flagship chemistry bet. 铝行业最具标志性的惰性阳极合资项目。
  • Norsk HydroHalZero chlorine/hydrogen route, plus some of the world's largest post-consumer recycling capacity and certified low-carbon product lines. 氢基路线与全球领先的再生铝产能。
  • Emirates Global AluminiumSolar-powered aluminium sold commercially since 2021, sourced from Dubai's utility-scale solar park. 自 2021 年起商业化销售太阳能铝。
  • US Department of Energy + Century AluminumFederal industrial demonstration support for the first new US primary smelter in roughly 45 years. 美国约 45 年来第一座新建原铝电解厂。
  • Chinese producers relocating to Yunnan hydropowerMillions of tonnes of capacity physically moved off coal — in tonnage terms, the largest decarbonisation capital reallocation in the industry's history. 从煤电向云南水电的整体产能迁移。
  • Venture and growth capitalScrap sorting technology, red-mud metals recovery, product carbon footprint data infrastructure. Small cheques, high leverage. 分选技术、赤泥金属回收、碳足迹数据基础设施。

Choosing it and paying attention

选择它并持续关注的一方
  • AppleBought the first commercial-purity aluminium produced without direct carbon emissions from the ELYSIS process in 2019, and uses low-carbon aluminium in product enclosures. 2019 年购入首批 ELYSIS 无直接碳排铝。
  • BMW GroupContracted solar-powered aluminium from EGA since 2021 and hydro-based aluminium from Canada for wheel and body components. 自 2021 年采购太阳能铝。
  • European automakers broadlyMercedes-Benz, Volvo and Audi have all contracted low-carbon or recycled-content aluminium for body structures. 欧洲车企普遍锁定低碳与高再生含量铝。
  • Beverage can makers and brandsThe fastest genuine closed loop in consumer materials — cans return as cans in weeks, not decades. 消费材料中最快的真实闭环。
  • First Movers Coalition signatoriesCommitted to at least 10% of annual aluminium purchases being near-zero (≤3 t CO₂e per tonne) by 2030 — demand-side certainty ahead of supply. 承诺 2030 年前至少 10% 采购量为近零排放铝。
  • Missing: public procurementMost national “buy clean” programmes still cover concrete, steel, asphalt and glass — and omit aluminium entirely. The largest single buyer in most economies is not yet in the room. 多数国家的绿色采购清单仍不包含铝——最大买家尚未入场。
The big 5 · 五大支柱

What a value-advantage aluminium market needs

走向价值优势型可持续铝市场的五件大事

Five, in order of how much they move the number. Miss any one and the other four stall.
按对总量的影响排序。缺任何一项，其余四项都会停滞。

  1. 01

    Clean firm electrons at smelter scale

    规模化的清洁稳定电力

    Sixty per cent of the footprint sits in a 15 MWh-per-tonne electricity bill that never sleeps. Nothing else in this list matters as much, and nothing else is as constrained by grids rather than by metallurgy.

  2. 02

    Circularity as primary supply

    把循环当作主供给，而非补充

    Scrap is the cheapest low-carbon tonne on earth at about 5% of the energy. Treating recycled metal as a supply strategy — not a sustainability chapter — is the fastest available emissions cut and the strongest return.

  3. 03

    Non-carbon chemistry

    非碳阳极化学

    Inert anodes and hydrogen routes address the ~1.5 t CO₂ per tonne that is chemistry, not fuel. This is the last 20% no power contract can ever reach, and it needs to be funded a decade before it pays.

  4. 04

    A carbon-differentiated market that pays

    真正会付钱的碳差异化市场

    Comparable product carbon footprints, border carbon pricing, verified certification and a traded low-carbon contract. Today's premium is too thin to finance the chemistry — that gap is the whole commercial problem.

  5. 05

    Bauxite-to-residue integrity

    从铝土矿到赤泥的完整责任

    Mining footprints, land and water, community consent, and 4.6 billion tonnes of stored red mud. Aluminium that is low-carbon but socially reckless will fail — carbon is only one column of the ledger.

The benchmark · 对标结论

On track / needs calling out

走在轨道上的 / 必须点名的

The honest scoreboard. Not a scorecard for anyone — a shared list of what to keep and what to fix.
一份诚实的记分板：不是为了评判谁，而是共同确认什么值得保留、什么必须修正。

On track

走在轨道上
  • Recycling volumes and sorting technologyGrowing faster than most forecasts assumed; the technology risk is essentially retired. 增速超预期，技术风险基本解除。
  • Inert anode has left the laboratoryIndustrial demonstration, not a research paper. The pathway exists. 已进入工业示范阶段，路径成立。
  • Aluminium inside China's national carbon marketThe world's largest producer now has a compliance price signal. 全球最大生产国已有合规价格信号。
  • A border price on embedded carbon from 2026CBAM makes carbon intensity a trade variable, not a disclosure. 碳强度成为贸易变量。
  • Certified low-carbon metal can be tradedCertification schemes and dedicated trading venues now exist. 认证与专门交易场所已建立。

Needs calling out

必须点名的
  • New coal-fired smelting still being builtSoutheast Asia in particular — 40-year assets financed on 5-year logic. 仍在新建燃煤电解产能。
  • Market-based renewable claims on coal gridsUnbundled certificates are the sector's single biggest greenwash vector. 市场法核算是最大的漂绿口径。
  • Hydrology is not a guaranteeA dry year in Yunnan or Brazil turns “green” tonnes brown, and contracts rarely price that. 枯水年风险很少被合同定价。
  • The green premium is too thinA few tens of dollars per tonne cannot finance a new chemistry. 溢价不足以支撑新化学路线的投资。
  • Scrap leakage and downcyclingWrought scrap dropping into cast alloys, plus export distortions, destroy value permanently. 废料降级与出口扭曲永久损失价值。
  • 4.6 Gt of bauxite residue with no ownerNo jurisdiction, buyer or standard has taken responsibility at scale. 无人真正承担的历史堆存。
  • Demand growth is outrunning abatementRoughly +80% metal by 2050 against a 1.1 Gt starting footprint. 需求增长跑在减排前面。
  • No comparable capex figure existsYou cannot mobilise capital against a number nobody agrees on. 没有共识数字，就难以动员资本。
Sources · 参考来源

Open the raw material

打开原始材料，继续往下挖

Every figure above traces back to one of these. If a line here matters to you, go to the source and keep reading — that is the point of this page.
上文每个数据都可追溯至以下来源。若某一条对你重要，请直接打开原始出处继续阅读——这正是本页的目的。

Data & scenarios · 数据与情景

Technology · 技术路线

Policy & market · 政策与市场

Producers, buyers & markets · 生产、采购与市场

Read one source further than this page → 比这一页再多读一份原始资料