The decarbonization roadmap — what is on track, what needs calling out
钢铁脱碳路线图 —— 哪些已在轨道上，哪些仍需被点名
Hot metal → cold electrons · 铁水 → 绿电
Why · What · How — 为什么 / 是什么 / 怎么做
Power sectors can be greened with new build. Steel cannot — it must be rebuilt, furnace by furnace, on a capital cycle that turns over roughly once every twenty years. That is why the window that opens in 2026 is not a policy date. It is a metallurgy date. 电力可以靠新建实现绿色化，钢铁不行——它必须一座炉、一座炉地重建，而资本周期二十年才轮转一次。2026 年开启的窗口，不是一个政策日期，而是一个冶金日期。
Coal in steel is not a fuel choice, it is a chemical reductant. Carbon strips oxygen from iron ore at 1,500 °C. Removing coal means changing the chemistry — hydrogen, or electrons — not just the energy source.1
钢铁用煤不是燃料选择，而是化学还原剂：碳在 1500℃ 下从铁矿石中夺走氧。去煤意味着更换化学路径——氢或电子——而不仅仅是换能源。
Assets are lumpy, long-lived and traded globally, so a unilateral carbon price leaks. Hence CBAM, hence standards.5
Three routes carry 2050: scrap-fed EAF (cheapest, capped by scrap supply), H₂-DRI + EAF (the workhorse, needs cheap green power), and direct iron electrolysis (the leapfrog, still pre-commercial). CCUS covers the residual.4
三条路径承载 2050：废钢电炉（最便宜，受废钢供应限制）、氢基直接还原铁 + 电炉（主力，依赖廉价绿电）、铁矿直接电解（跨越式，尚未商业化）。CCUS 处理残余排放。
Note the shift: the emissions live in ironmaking, not steelmaking. So the map of steel is being redrawn around where clean electrons and ore meet.
Four questions kill most greenwash: Is it tonnes or intensity? Is scrap being counted as abatement? Is the hydrogen contracted or aspirational? Is there a signed offtake at a premium?
四个问题足以识别漂绿：谈的是总量还是强度？是否把废钢当作减排？氢是已签约还是愿景？是否存在溢价包销协议？
Then check the reline calendar. A furnace rebuilt in 2027 on coal is a 2047 emitter, whatever the pledge says.6
The Roadmap · 路线图
Every blast furnace reline is a twenty-year vote on 2050.
每一次高炉大修，都是对 2050 年投下的一张二十年选票。
钢铁的减排不发生在报告里，发生在检修计划表上。
By region · 分区域视角
Global averages hide everything that matters. Where a tonne of steel is made determines whether decarbonizing it is an engineering problem, a financing problem, or a political one. 全球平均值掩盖了所有关键差异。钢在哪里被生产，决定了脱碳究竟是工程问题、融资问题，还是政治问题。
Past peak production, with a state-driven capacity-swap regime and a vast ultra-low-emission retrofit programme already delivered. The national ETS was extended to steel, cement and aluminium in 2025 — the single largest new coverage of industrial carbon in history.14
粗钢产量已过峰值，产能置换与超低排放改造大规模落地；2025 年全国碳市场扩容至钢铁、水泥、电解铝，是史上覆盖工业碳排最大的一次扩围。
Call out: EAF share still ~10–11%; free allocation keeps the effective carbon price low.需点名：电炉钢比重仍仅约 10–11%；免费配额使有效碳价偏低。The most complete policy stack on earth: ETS + CBAM + Innovation Fund + the 2025 Steel and Metals Action Plan. Also the place where the gap between announcement and steel-in-the-ground is now most visible.5
拥有全球最完整的政策组合：碳市场 + 碳边境机制 + 创新基金 + 2025 年钢铁与金属行动计划；同时也是"宣布"与"落地"差距最明显的地区。
Call out: several flagship DRI conversions paused or re-scoped on power price and hydrogen cost.需点名：多个旗舰 DRI 项目因电价与氢成本被暂停或重新评估。The demand story of the century, and therefore the decisive one. A Green Steel Taxonomy (Dec 2024) introduced a star-rating with a <2.2 t CO₂/tcs green threshold, paired with the National Green Hydrogen Mission.17
本世纪最大的需求增量，因而具有决定性。2024 年 12 月发布绿钢分类标准，以 <2.2 tCO₂/吨钢 为门槛设星级评定，并与国家绿氢使命衔接。
Call out: new coal-based DRI and sponge iron capacity is still being built ahead of the clean route.需点名：煤基直接还原铁与海绵铁新增产能仍在先行建设。Structurally the lowest-intensity large producer because it was already scrap-based. DOE's Industrial Demonstrations Program committed multi-billion-dollar cost-share to first-of-a-kind iron and steel projects.16
因长期以废钢电炉为主，是大型产钢国中碳强度最低者。美国能源部工业示范项目曾为首套铁钢项目提供数十亿美元配套资金。
Call out: policy reversibility — several awards were withdrawn or cancelled in 2025.需点名：政策可逆性——2025 年多项资助被撤回或取消。Technology-rich, scrap-rich, coal-locked. Japan's ¥20 trn GX programme and Nippon Steel's shift toward large-scale EAF; Korea's POSCO pursuing HyREX fluidized-bed hydrogen reduction.18
技术强、废钢多、但仍高度依赖煤。日本以 20 万亿日元 GX 计划推动，新日铁转向大型电炉；韩国浦项推进 HyREX 流化床氢还原。
Call out: timelines cluster after 2030 — little abatement lands this decade.需点名：时间表集中在 2030 年之后，本十年内减排量有限。Where cheap renewables sit on top of iron ore: Gulf DRI clusters, Western Australia's green iron pilots, Brazilian mega-hubs. These regions do not need to decarbonize steel — they need to decarbonize iron, then export it.
廉价可再生能源与铁矿重叠之地：海湾 DRI 集群、西澳绿色铁中试、巴西大型枢纽。这些地区要脱碳的不是"钢"，而是"铁"，然后出口。
Watch: this is the highest-ROI greenfield play of the next decade.关注：这是未来十年回报率最高的绿地投资方向。Emerging investment areas & returns · 新兴投资方向与回报
Returns below are indicative bands drawn from public project economics and sector modelling, not a valuation. The honest reading: the abatement ladder is steep and the cheapest rungs are still under-invested. 以下回报为基于公开项目经济性与行业建模的指示性区间，非估值结论。诚实的结论是：减排阶梯很陡，而最便宜的那几级仍然投资不足。
On track? Partly. The clearest positive-NPV work in the sector, still routinely deferred because it competes with growth capex for the same board attention.
The most underrated trade. Sensor-based sorting and copper tolerance decide whether the world's 1 Gt of future scrap makes flat automotive steel or only rebar. Highest CO₂ removed per dollar.
Bankable today. Hydrogen-ready design is a cheap option premium; the risk is building gas-locked assets without the switch engineered in.
*Only with signed premium offtake plus policy support. Needs calling out: at current EU power and electrolyser costs several announced conversions have slipped — the technology is proven, the electricity price is not.
Not an IRR play — an option on sub-$30/MWh power. Backed by Breakthrough Energy, ArcelorMittal XCarb, Microsoft's climate fund, BHP Ventures. Small tickets, asymmetric payoff.1112
Only bankable with a durable carbon price or tax credit. Valid for the residual and for regions with storage; dangerous as a reason to reline a furnace on coal.
The quiet compounder. Under CBAM, verified embedded emissions become a customs number. No credible data, no premium, no market access.13
Capital & conviction · 谁在出钱，谁在买单
Steel does not get decarbonized by investors alone. It gets decarbonized when a patient balance sheet meets a buyer willing to pay a premium for the same tonne. Both columns below have to exist at once. 钢铁不会仅靠投资者完成脱碳。只有当耐心资本遇上愿意为同一吨钢支付溢价的买家时，转型才真正发生。下面两栏必须同时存在。
01 — Who is putting capital in / 出资方
02 — Who is buying it / 采用与买单方
The Big 5 · 五大关键
The cheapest tonne of CO₂ in the whole system is the tonne of iron you never reduce again. Recycled steel emits roughly a fifth to an eighth of primary steel. Yet scrap policy — export rules, sorting infrastructure, copper tolerance, design for disassembly — is the least glamorous and most neglected part of the roadmap.
整个体系中最便宜的一吨减排，是你无需再次还原的那一吨铁。再生钢碳排仅为原生钢的约 1/5 至 1/8。然而废钢政策——出口规则、分选设施、铜杂质容限、可拆解设计——是路线图中最不光鲜、也最被忽视的部分。
Over 90% of the emissions sit in turning ore into metal. Once you accept that, the industrial map redraws itself: reduce iron where renewable electricity is cheapest, ship the metallics, melt them near the customer. This is the largest reallocation of heavy industry since containerization.
超过 90% 的排放来自把矿石变成金属这一步。接受这一点，产业地图便会重绘：在绿电最便宜处还原铁，运输金属料，在靠近客户处熔炼。这是自集装箱化以来重工业最大的一次重新布局。
Capital cycles, not climate targets, set the real timetable. A blast furnace relined on coal in 2028 is still emitting in 2048. Track the campaign calendars, not the pledge dates — this is the single most useful benchmark discipline in the sector.
决定真实时间表的是资本周期，而不是气候目标。2028 年以煤基方式大修的高炉，2048 年仍在排放。追踪炉役日历，而不是承诺日期——这是本行业最有用的一条基准纪律。
A green premium is a market, not a handout. CBAM, buyer clubs, and green public procurement together convert an environmental attribute into a price. Where offtake was signed before financial close, projects moved. Where it was not, they paused. The correlation is close to perfect.
绿色溢价是市场，不是施舍。碳边境机制、买方联盟与绿色公共采购共同把环境属性转化为价格。凡在融资关闭前签下包销的项目都在推进，没有的都在暂停——这一相关性近乎完美。
One shared definition of near-zero, one verified accounting boundary, one traceable certificate per tonne. Without it, mass-balance accounting quietly resells the same green tonne several times and the premium collapses. Measurement is not admin — it is the market's load-bearing wall.
一个统一的"近零"定义、一套经核查的核算边界、每吨一张可追溯证书。否则质量平衡核算会悄悄把同一吨绿钢卖上数次，溢价随之崩塌。计量不是行政工作，而是市场的承重墙。
Benchmark scorecard · 基准对照
Sources · 参考文献与数据来源
Every figure above traces to a primary or institutional source. These are the documents worth reading next — start with 01, 04 and 06 if you only read three. 上文每一项数据都可追溯至一手或机构来源。若只读三份，建议从 01、04、06 开始。
Coda · 结语
It is about steel, but it is more than that. Steel is the material that carries every other transition on its back — the turbine tower, the rail, the hospital frame, the bridge a child crosses to school. If we can rebuild the most carbon-intensive supply chain on earth without breaking the industries and the towns that depend on it, we will have proven that a healthy transformation is possible anywhere.
这是关于钢的，但又不止于钢。钢是背负着所有其他转型的材料——风机塔筒、铁轨、医院的框架、孩子上学要走过的那座桥。如果我们能够重建地球上碳强度最高的供应链，而不摧毁依赖它的产业与城镇，我们就证明了：健康的转型，在任何地方都有可能。
This page is a benchmark, not a recommendation. It exists to be argued with — and to be re-checked against the sources above.
本页是一次基准对照，而非投资建议。它存在的意义，是被质疑，并被对照上述来源反复核验。
Research benchmark · 研究基准 · 2026–2050