April 2026
April 2026
The world makes about 1.9 billion tons of steel every year. Roughly 29% of that steel now comes from electric arc furnaces that melt recycled scrap rather than smelting iron ore in blast furnaces. That share is heading to 40% by 2030 and potentially beyond 50% by 2050, because EAF steelmaking produces about 70% less CO2 per ton than the blast furnace route. Every government with a decarbonization target is pushing steelmakers in this direction.
Here is the problem nobody talks about: every ton of steel produced in an EAF generates 15 to 20 kilograms of fine, toxic dust that gets caught in the furnace’s exhaust system. This dust is classified as hazardous waste in every major jurisdiction because it contains heavy metals like lead, cadmium, and chromium. It cannot be landfilled in most countries. It must be recycled or treated at specialized facilities before disposal. Globally, EAF steelmaking generates between 5 and 10 million tons of this dust per year, and that number is growing in lockstep with the steel decarbonization mega-trend.
The dust also contains something valuable: zinc, at concentrations of 20 to 25% by weight. Zinc is a $40 billion global market, essential for galvanizing steel, producing brass, and increasingly for energy storage batteries. Recovering zinc from steel dust is both an environmental obligation and a commercial opportunity. The companies that do this operate at the intersection of mandatory environmental compliance and commodity economics, which creates a business model unlike almost anything else in the industrial landscape.
This primer explains how the technology works, who the players are, and where the investment opportunities sit.
Think of EAF dust recycling like a municipal sewage treatment plant, but for the steel industry. Every city needs sewage treatment because you cannot simply dump raw waste into the river. The steel industry faces an analogous problem: it generates a toxic byproduct that is illegal to dump and expensive to store, but that byproduct happens to contain valuable metals.
Before the hazardous waste recycling industry existed, steel mills had two options. The first was to send EAF dust to hazardous waste landfills, which is expensive (disposal fees run $50 to $150 per ton depending on jurisdiction), consumes scarce permitted landfill capacity, and creates long-term environmental liability. The second was to stockpile the dust on-site, which creates regulatory risk and eventually runs into the same disposal problem.
The breakthrough that created this industry was the adaptation of the Waelz kiln process in the 1950s. The Waelz process was originally developed in the early 1900s by zinc producers to enrich low-grade zinc ore. Someone realized it could be applied to EAF dust, which has zinc concentrations comparable to marginal zinc ore deposits. The process uses high temperatures and a carbon reductant (coke) to selectively vaporize zinc from the dust, leaving behind an iron-rich residue that can be fed back into steel furnaces. In a single step, you solve the waste disposal problem, recover a valuable commodity, and create a secondary iron feedstock.
The fundamental insight is that EAF dust is not really “waste” at all. It is an urban mine, a concentrated source of zinc that happens to come wrapped in a regulatory obligation to process it. This creates a dual revenue stream that is structurally different from both pure waste management and pure mining: the recycler gets paid by the steel mill to take the dust (the gate fee, analogous to a tipping fee at a landfill) and then gets paid again when it sells the recovered zinc. One input, two revenue streams. The gate fee provides downside protection when zinc prices are low, and the zinc revenue provides upside when prices are high.
EAF dust is a fine particulate collected from the exhaust gases of electric arc furnaces. Its composition varies depending on the scrap being melted, but a typical analysis looks like this:
| Component | Concentration | Why It Is There |
|---|---|---|
| Iron (Fe) | 25-35% | From the steel scrap being melted |
| Zinc (Zn) | 15-30% | From galvanized steel scrap |
| Calcium (Ca) | 5-10% | From fluxing agents (lime) |
| Lead (Pb) | 1-5% | From impurities in scrap |
| Chlorine (Cl) | 2-7% | From coatings, oils, and plastics in scrap |
| Cadmium (Cd) | 0.01-0.05% | Trace heavy metal |
| Chromium (Cr) | 0.1-1% | From stainless and alloy steel scrap |
| Silicon (Si) | 2-5% | From furnace refractories and scrap |
The zinc comes primarily from galvanized steel scrap. Galvanizing (coating steel with zinc to prevent corrosion) is one of the largest end uses of zinc globally. When galvanized steel reaches end of life and enters the scrap stream, the zinc coating vaporizes at EAF operating temperatures (1,600 to 1,800 degrees Celsius), because zinc’s boiling point is only 907 degrees Celsius. The zinc vapor oxidizes in the exhaust gas to form zinc oxide (ZnO) particles, which are captured in the furnace’s baghouse filter system along with other volatile metals and fine particulates. This is the EAF dust.
The hazardous classification comes from the lead and cadmium content. Both are toxic heavy metals that can leach into groundwater if improperly disposed of. The EU classifies EAF dust under waste code 10 02 07* (hazardous), and the US EPA lists it as K061 hazardous waste. This classification is what makes recycling mandatory rather than optional in most jurisdictions.
The Waelz kiln process exploits a simple thermodynamic fact: zinc oxide reduces to metallic zinc vapor at temperatures above about 900 degrees Celsius in the presence of carbon, while iron oxide requires temperatures above 1,100 degrees Celsius to fully reduce. By operating at approximately 1,100 to 1,250 degrees Celsius, you can selectively vaporize the zinc while leaving most of the iron behind in solid form.
The core chemistry is a carbothermic reduction:
ZnO + C → Zn(vapor) + COThe metallic zinc vapor exits the kiln with the process gas, encounters oxygen in the cooler sections, and re-oxidizes:
2Zn(vapor) + O2 → 2ZnOThis re-oxidized zinc oxide, called Waelz oxide (WOx), is collected in the baghouse as a fine powder with 55 to 65% zinc content. It is the primary saleable product.
The iron remains in the kiln as part of a slag called Waelz slag, a mix of iron oxides, calcium compounds, and gangue minerals. In some configurations this slag is suitable for use as aggregate in road construction or as a secondary iron feedstock, though disposal or reuse options depend heavily on local regulations.
Lead and cadmium behave like zinc in this system: they volatilize, exit with the gas, and concentrate in the Waelz oxide. Downstream zinc smelters handle the separation of these impurities during the zinc refining process.
The Waelz kiln is a large rotary kiln, essentially a gently inclined steel tube lined with refractory brick, rotating slowly (1 to 2 RPM) on its axis. It is typically 50 to 80 meters long and 3 to 5 meters in diameter. Material enters at the upper end and gradually tumbles toward the lower discharge end over a residence time of 4 to 6 hours.
The rotary kiln is used for the same reason cement kilns are rotary: it provides continuous, uniform mixing of solids with hot gas, excellent heat transfer, and the ability to process large volumes of granular material continuously. EAF dust is pelletized with coke and lime before entering the kiln because loose dust would be entrained in the gas flow and blown out before it could react.
The pelletization step is critical. Raw EAF dust is too fine (particle size typically 1 to 10 microns) to feed directly into a kiln. It is mixed with water, coke breeze (fine coke), and lime, then agglomerated into pellets of 5 to 15 mm diameter in a pelletizing drum. The coke provides the carbon reductant. The lime acts as a flux and helps control chlorine chemistry (preventing aggressive corrosion of downstream equipment by forming calcium chloride instead of volatile zinc chloride).
Waelz oxide (WOx): The zinc-rich intermediate product, typically 55-65% Zn. Not pure enough to sell directly; it goes to zinc smelters for further refining.
Special High Grade (SHG) zinc: The final refined zinc product at 99.995% purity, tradeable on the London Metal Exchange.
Treatment charge (TC): The fee paid by zinc concentrate sellers (including Waelz oxide producers) to zinc smelters for refining. When TCs are high, it costs more for Befesa to get its WOx refined; when TCs are low or negative (as in late 2024), smelters are desperate for feed and WOx producers benefit.
Gate fee / service fee: The price a steel mill pays the recycler to take its EAF dust. Typically set by long-term contract, adjusted for inflation, and relatively stable regardless of commodity prices.
C90: The zinc price at which the most expensive 10% of global zinc mines break even. Historically acts as a floor for zinc prices because mines shut down when the price drops below their cost of production. The C90 has grown at approximately 6% CAGR over 15 years, providing structural upward support for zinc prices.
EAF penetration rate: The percentage of total steel production that uses the electric arc furnace route rather than the blast furnace (BF-BOF) route. Global EAF penetration was 29.1% in 2024 and is projected to reach 40% by 2030.
Steel Mill (EAF)
│
▼
EAF Dust (15-30% Zn, hazardous)
│
▼ ─── Gate fee revenue ←── Steel mill pays recycler
│
[1. COLLECTION & TRANSPORT]
│ Dust collected from baghouse, loaded into sealed
│ containers, trucked to recycling plant (short distance
│ critical — plants located near EAF clusters)
│
▼
[2. RAW MATERIAL PREPARATION]
│ Dust mixed with coke breeze (carbon reductant)
│ and lime (flux), plus water. Proportions adjusted
│ based on dust composition analysis.
│
▼
[3. PELLETIZING]
│ Mixture formed into 5-15mm pellets in
│ rotating drum. Pellets must be strong enough
│ to survive kiln tumbling without crumbling.
│
▼
[4. WAELZ KILN]
│ Pellets fed into upper end of rotating kiln.
│ Temperature zone: 1,100-1,250°C.
│ Residence time: 4-6 hours.
│ Zinc reduces to vapor, exits with gas.
│ Iron-rich slag exits at lower end.
│
├──── Gas + Zinc vapor ────┐
│ ▼
│ [5. RE-OXIDATION]
│ Zinc vapor meets O2,
│ forms ZnO particles
│ │
│ ▼
│ [6. BAGHOUSE COLLECTION]
│ Waelz oxide (WOx) captured
│ 55-65% Zn content
│ │
│ ▼ ─── Commodity revenue
│ [7. SOLD TO ZINC SMELTER]
│ Refined into SHG zinc
│ (99.995% purity)
│
▼
[WAELZ SLAG]
Iron-rich residue, used as construction
aggregate or returned to steelmakingChlorine management is the single biggest operational challenge. If the scrap going into the EAF contains high chlorine content (from PVC coatings, cutting fluids, etc.), the resulting dust will have elevated chlorides. Chlorine attacks kiln refractories, corrodes downstream equipment, and creates problems for zinc smelters receiving the Waelz oxide. Lime dosing in the pelletizing step helps, but high-chlorine dust requires special handling and reduces plant throughput.
Zinc content variability affects economics directly. Some steel mills produce dust with 30% zinc (high-value), others produce dust with only 10% (marginal). Recyclers prefer long-term contracts with mills that produce high-zinc dust, and they adjust gate fees based on dust composition.
Kiln accretions are a persistent maintenance issue. Sticky molten material can build up on the kiln walls, reducing effective volume and throughput. Operators must periodically stop and mechanically remove accretions.
Environmental compliance at the plant itself requires sophisticated emission controls. The kiln off-gas contains not just zinc oxide but also volatile organic compounds, dioxins, and other pollutants that must be captured and treated before release.
| Metric | What It Measures | Current Benchmarks | Why It Matters |
|---|---|---|---|
| Plant utilization (%) | Actual throughput vs. installed capacity | Best-in-class >90%, Befesa Europe 92%, US 70%, China 50% | Primary driver of unit economics; fixed costs are high |
| EBITDA per ton (€/t) | Profitability per ton of dust processed | €114/t (Befesa US 2024), ~€140/t (Befesa Europe), target €130-140/t US | Operating efficiency benchmark |
| Zinc recovery rate (%) | % of zinc in dust that ends up in WOx | 85-95% for modern Waelz kilns | Technical efficiency of the kiln |
| WOx zinc content (%) | Zinc concentration in the Waelz oxide product | 55-65% | Higher is more valuable to smelters |
| Coke-to-throughput ratio | Tons of coke consumed per ton of dust processed | 25-38%, improving | Major cost driver; lower is better |
| Gate fee (€/t) | Service fee charged to steel mills | Stable, long-term contracted, region-dependent | Revenue floor independent of zinc prices |
| Zinc blended price (€/t) | Weighted average of hedged and spot zinc prices realized | Befesa 2024: €2,549/t; 2025 hedge: €2,640/t | Revenue upside; hedging smooths volatility |
The industry’s version of Moore’s Law is the steady improvement in coke efficiency. Befesa’s US operations reduced coke consumption by 21% between 2021 and 2024 (from 133kt to 105kt) while maintaining throughput, by implementing European best practices at the former American Zinc Recycling plants. The coke-to-throughput ratio dropped from 38% to 25%. Since coke is one of the largest variable costs (at €105 to 230 per ton depending on market), this translates directly into margin improvement.
Plant utilization is the other key metric to track. The business has high fixed costs (kiln maintenance, environmental compliance, labor, permits), so profitability is extremely sensitive to utilization. The difference between 70% and 90% utilization at a typical plant can be the difference between breakeven and 35%+ EBITDA margins.
Waelz Kiln (dominant, ~75% of global EAFD recycled): The standard, described in detail above. Pros: proven at scale, continuous operation, handles variable feed compositions. Cons: high energy consumption (coke), CO2 emissions from carbon reductant, limited ability to recover iron in usable form.
SDHL Waelz Process (Befesa proprietary): Befesa’s variant of the standard Waelz kiln. Uses the exothermic heat generated by iron oxide reduction within the kiln itself, reducing external energy requirements. Befesa claims this reduces energy consumption significantly and cuts CO2 emissions by 40% compared to conventional Waelz kilns. This is the primary technology across Befesa’s European plants.
Submerged Arc Furnace (SAF): Used specifically for stainless steel dust (which contains valuable chromium and nickel in addition to zinc). The SAF operates at higher temperatures and can recover chromium and nickel as a ferro-alloy. Befesa operates SAF furnaces for this niche application.
Plasma Arc: Experimental and niche. Uses a plasma torch to achieve very high temperatures, enabling more complete metal recovery. Higher capital cost and energy consumption limit commercial adoption. Used by Befesa for some specialty stainless steel residues.
Acid leaching: Dissolves zinc from EAF dust using sulfuric acid, hydrochloric acid, or other solvents. Can achieve high zinc recovery and produces a zinc sulfate or zinc chloride solution for electrowinning. Pros: lower CO2 emissions than pyrometallurgy, potentially higher zinc recovery, can operate at smaller scale. Cons: generates large volumes of wastewater requiring treatment, struggles with the complex mineralogy of EAF dust (zinc is present in multiple chemical forms), and has not achieved commercial scale comparable to Waelz kilns.
Caustic leaching (alkaline): Uses sodium hydroxide to selectively dissolve zinc while leaving iron and other metals behind. Cleaner separation but lower zinc recovery rates and high reagent costs. Research-stage for EAF dust.
| Factor | Waelz Kiln | Hydrometallurgical |
|---|---|---|
| Commercial maturity | 70+ years, dominant | Pilot/demo stage |
| Throughput | 100-200kt per kiln per year | Typically <50kt |
| Capital cost | €50-100M per plant | Lower per unit, but unproven at scale |
| Zinc recovery | 85-95% | Potentially higher (>95%) |
| CO2 emissions | Higher (uses coke) | Lower |
| Water use | Minimal | High |
| Ability to handle variable feed | Excellent | Moderate |
| Iron recovery quality | Low (slag) | Potentially better |
| Waste streams | Slag (manageable) | Wastewater (problematic) |
Bottom line: Hydrometallurgy is the future challenger but is at least a decade away from displacing Waelz kilns at scale. The installed base of Waelz kilns, the proven economics, and the ability to handle variable feed compositions give pyrometallurgy a structural advantage that is difficult to overcome quickly. Incremental improvements to the Waelz process (like Befesa’s SDHL variant) are extending the technology’s competitive life.
Befesa’s second business segment, aluminum salt slags recycling, operates on similar principles but with different chemistry and a different value chain.
When aluminum is melted in secondary (recycling) smelters, a layer of salt flux (typically NaCl and KCl) is added to prevent oxidation. This salt flux absorbs impurities and aluminum oxide, forming a crust called salt slag or salt cake. Salt slag is classified as hazardous waste because it contains reactive aluminum metal that generates hydrogen gas and ammonia when exposed to water.
Befesa’s process crushes the slag, extracts metallic aluminum (which is sold as secondary aluminum alloy), dissolves the salts in water, and crystallizes them for reuse as flux in smelters. The aluminum oxide residue (alumina) can be used in cement production. The process is circular: the salt goes back to the smelter, the aluminum goes back to the market, and the oxide goes to cement. No solid waste to landfill.
This business is less commodity-sensitive than steel dust recycling because the primary revenue is from aluminum recovery and service fees rather than zinc prices. Salt slags recycling runs at approximately 30% EBITDA margins and 91% utilization in Befesa’s European plants, providing stable, high-margin cash flow that anchors the group’s earnings.
The secondary aluminum segment (producing aluminum alloys from scrap) is more cyclical, tied to the European automotive industry, which has been weak since 2022. This segment ran at 84% utilization in 2024 with compressed metal margins due to weak auto demand and aluminum scrap scarcity.
[STEEL MILLS / ALUMINUM SMELTERS]
Generate hazardous waste (EAF dust / salt slags)
Pay gate fees to recyclers
│
▼
[COLLECTION & LOGISTICS]
Short-distance trucking (cost-sensitive)
Plants must be near customers
│
▼
[RECYCLING PLANTS] ──────────────────────────────────
Waelz kilns, SAF, salt slag processing │
KEY VALUE CREATION LAYER │
Revenue: gate fees + commodity sales │
Margins: 17-35% EBITDA depending on segment │
Barriers: permits, capital, customer proximity │
│ │
├──── Waelz Oxide (WOx) ────┐ │
│ ▼ │
│ [ZINC SMELTERS] │
│ Refine WOx to SHG │
│ zinc (99.995%) │
│ Revenue: zinc sales │
│ │ │
│ ▼ │
│ [ZINC END MARKETS] │
│ Galvanizing (60%) │
│ Brass & bronze (10%) │
│ Chemicals (10%) │
│ Batteries (growing) │
│ │
├──── Waelz Slag ───────────────────────── │
│ Road aggregate / iron feedstock │
│ │
├──── Secondary Aluminum ──────────────── │
│ Aluminum alloys to foundries │
│ │
└──── Recovered Salt ─────────────────────┘
Back to aluminum smelters (circular)| Layer | Estimated Market Size | Margins | Concentration |
|---|---|---|---|
| Gate fees (service revenue) | ~$800M-1B globally | Stable, contracted | Concentrated regionally |
| Zinc sales (commodity revenue) | ~$800M-1.2B globally | Variable with LME zinc | Same players |
| Total EAF dust recycling market | ~$2B (2024), growing to ~$3.1B by 2034 | EBITDA 17-35% | Top 3-5 players dominate regionally |
| Salt slags recycling (Europe) | ~€100-150M | 30%+ EBITDA margin | Befesa dominant |
| Zinc smelting/refining | Much larger ($40B+ zinc market) | Cyclical | Different players |
The key insight is that the recycling layer captures value from both sides: it gets paid to take the waste (service fee) and gets paid for the product (commodity). This dual revenue stream is what makes the business model resilient through cycles.
The market is regionally oligopolistic. Transportation costs for hazardous waste are high relative to its value, so plants must be located near EAF steel production clusters. This creates natural geographic moats. A recycler in Germany does not compete with a recycler in South Korea for the same customers.
Total global EAF dust production: 5-10 million tons per year Total market size: ~$1.98 billion (2024), projected $3.11 billion by 2034, 4.3% CAGR EAF facilities with recycling programs: >2,500 globally (2023)
| Company | HQ | Regions | Capacity | Public? | Notes |
|---|---|---|---|---|---|
| Befesa | Luxembourg/Spain | Europe, US, Turkey, S. Korea, China | ~1.7Mt EAFD + 600kt salt slags | Yes (BFSA.DE) | Global leader, only pure-play listed |
| Enviri Corp (fka Harsco) | US | US, Europe, LatAm | Major | Yes (NVRI) | Broader environmental services; EAFD is one segment |
| Zinc Nacional | Mexico | Mexico, US | ~200kt | Private | Strong in Mexico/LatAm |
| Steel Dust Recycling LLC | US | US | ~100-150kt | Private | Regional US player |
| Global Steel Dust | US | US, Middle East | ~150kt | Private | |
| Nippon Steel (in-house) | Japan | Japan | In-house | Yes (5401.T) | Processes own dust; not third-party |
| Recylex | France | Europe | ~100kt | Was listed, restructured | Focus on lead recycling |
| Marzinc | Turkey | Turkey | ~50-80kt | Private | Regional |
| Zochem | US/Canada | N. America | ~50kt | Private | Zinc oxide producer |
Befesa is the undisputed global leader in EAF dust recycling and the only publicly listed pure-play in the sector. Key scale metrics:
The competitive moat is built on three interlocking advantages:
1. Strategic plant locations. Befesa’s plants are located directly adjacent to or within short trucking distance of major EAF steel production clusters. EAF dust is low-value, high-volume, and hazardous, meaning transport costs are material. A plant that is 200km closer to a steel mill has a structural cost advantage that no competitor can replicate without building their own plant nearby, which requires years of permitting and tens of millions in capital.
2. Permitting barriers. Building a new hazardous waste recycling plant requires environmental permits that take 3 to 5+ years to obtain in most jurisdictions. Existing plants are grandfathered under older permit regimes and face less stringent requirements for capacity expansions than a greenfield competitor would face. This is a classic regulatory moat.
3. Long-term customer relationships. Steel mills sign multi-year contracts with recyclers because switching costs are real: changing your hazardous waste handler requires regulatory notifications, logistics reconfiguration, and carries risk if the new provider cannot reliably accept dust. Befesa’s European operations average 92% utilization even during periods when European steel production is at 5-year lows, because the contracted volumes are sticky.
Regulation is the engine that drives this entire industry. Without hazardous waste classification, steel mills would simply landfill EAF dust at minimal cost, and the recycling industry would not exist. Every regulatory tightening expands the addressable market. Every enforcement action validates the business model.
Environmental regulations for hazardous waste move in one direction: tighter. No government has ever relaxed hazardous waste classification for EAF dust. This creates an asymmetric dynamic: the addressable market can grow (through new classifications, stricter enforcement, or expanded geographic scope) but essentially cannot shrink. For incumbents with plants, permits, and customer relationships already in place, every regulatory tightening raises barriers to entry for new competitors while simultaneously expanding the market they serve.
Befesa is a Luxembourg-domiciled, Spanish-operated environmental services company that recycles hazardous residues from the steel and aluminum industries. It operates through two segments:
Steel Dust Recycling Services (67% of revenue, 80% of EBITDA): Collects and recycles EAF dust from electric arc furnace steelmakers, producing Waelz oxide (sold to zinc smelters) and Waelz slag. Also operates a zinc refinery in the US (Monaca, Pennsylvania) that converts Waelz oxide into Special High Grade zinc.
Aluminium Salt Slags Recycling Services (33% of revenue, 20% of EBITDA): Recycles salt slags from secondary aluminum smelters, recovering aluminum, salt (for reuse), and alumina. Also produces secondary aluminum alloys from scrap.
Network of 15+ strategically located plants. Befesa’s European plants are positioned next to every major EAF steel production cluster in Germany, Spain, France, and Sweden. In the US, six recycling plants cover the eastern steel belt from Pennsylvania to South Carolina. In Asia, plants in Turkey, South Korea, and two plants in China’s Jiangsu and Henan provinces cover the fastest-growing EAF markets.
Only vertically integrated EAFD recycler in the US. Through the 2021 acquisition of American Zinc Recycling and the 2022 acquisition of a zinc refinery in Monaca, Pennsylvania ($47M), Befesa can process EAF dust all the way from raw waste to finished SHG zinc in the US. No competitor has this capability domestically.
Hedging discipline. Befesa has hedged 60-70% of its zinc exposure for 2025 and 2026 at an all-time-high blended rate of approximately €2,650 per ton. This represents approximately €150/t above 2024 levels, translating to roughly €20M of incremental locked-in EBITDA in 2025 alone. The hedging strategy has been rigorously applied for 20+ years and provides earnings visibility that few commodity-exposed businesses can match.
Dual revenue model. The gate fee provides a revenue floor. Europe’s steel dust and salt slags operations (representing >75% of total EBITDA) sustain >35% EBITDA margins through the cycle regardless of commodity prices. The zinc component adds upside in strong markets.
| Metric | Steel Dust | Aluminium | Group |
|---|---|---|---|
| Revenue | €825.6M | €419.4M | €1,239M |
| Adj. EBITDA | €170.4M | €43.0M | €213.4M |
| EBITDA margin | 20.6% | 10.3% | 17.2% |
| Throughput | 1,211 kt dust | 426 kt salt slags / 171 kt 2nd alu |
| Metric | 2023 | 2024 | Change |
|---|---|---|---|
| Revenue | €1,181M | €1,239M | +5% |
| Adj. EBITDA | €182M | €213M | +17% |
| Operating Cash Flow | €147M | €192M | +30% |
| Net Debt | €604M | €619M | +2.5% |
| Leverage (Net Debt/EBITDA) | 3.32x | 2.90x | -0.42x |
2025 Outlook: Strong double-digit EBITDA growth expected. Management targets €300M EBITDA by 2028/29, even with no contribution from China. FY25 Adj. EBITDA reported at €243M (+14% YoY), confirming the trajectory.
| Region | Utilization | EBITDA/t | Status |
|---|---|---|---|
| Europe (steel dust) | 92% | ~€140/t | Cash cow, stable |
| Europe (salt slags) | 91% | High margin (30%) | Stable |
| Europe (2nd aluminium) | 84% | Compressed (weak auto) | Cyclically weak |
| USA (recycling) | 70% → 80% target (2025) | €114/t (up 63% since 2021) | Improving fast |
| USA (zinc refining) | 86% | -€15M contribution (2024) | Turnaround, breakeven 2025/26 |
| Turkey & S. Korea | 83% | Positive | Strong Q4 ’24 |
| China (Jiangsu) | 70% | Positive EBITDA | Best Chinese plant |
| China (Henan) | 20% | Breakeven-ish | Weak enforcement + real estate crisis |
1. Palmerton refurbishment (US): Expanding from 163kt to 220kt capacity with a 2nd kiln. Phase I complete (Q4 2024), Phase II targeting Q3 2025. Capex: €55-65M. EBITDA run-rate: €25-30M. Payback: 2-3 years. IRR: >30%. Already contracted 60kt of additional EAF dust from existing customers. This is the highest-return project in the company.
2. Bernburg expansion (Europe): New steel dust and salt slags capacity in Germany. Completing by Q2 2026. Low-risk brownfield expansion.
3. US zinc refining turnaround: The $47M Monaca refinery was losing €15M/year in 2024. Three-phase turnaround: quality (done, now 100% in-spec SHG), utilization (done, >85%), cost reduction (€15-20M savings targeted in 2025, 60-70 FTE reduction). Targeting breakeven 2025/26, then €5-15M EBITDA depending on zinc TC cycle.
4. 18 new EAF announcements in the US totaling 20 million tons of new steel capacity from ArcelorMittal, Nucor, Algoma, Nippon Steel/US Steel, Hybar, and others. This generates incremental EAF dust that Befesa is positioned to capture. The US is the single strongest growth market for EAFD recycling globally.
5. China long-term optionality: Three additional plants (China III, IV, V) are on hold, but the expansion plan could restart “fast” if the market recovers. China’s government targets EAF at 30% of steel production by 2035 (from ~10% today). If realized, this represents a massive expansion of the addressable dust market.
CEO position under transition. The company was founded by the Abengoa group and later taken private by Triton Partners before its 2017 IPO on the Frankfurt Stock Exchange. Management has a track record of disciplined capital allocation, evidenced by pausing the China expansion plan rather than throwing capital at a weak market, and prioritizing deleveraging before growth spending.
1. Zinc price sensitivity: 30-40% of EBITDA is linked to zinc prices. Each $100/t change in unhedged zinc LME impacts FY EBITDA by €7-8M. Mitigated by hedging (60-70% hedged 1-3 years forward) and the C90 production cost floor ($2,500/t, growing at 6% CAGR).
2. China execution: €90M invested, currently at 50% utilization and breakeven. Real estate crisis in its 5th year of decline. Henan plant at only 20% utilization with weak environmental enforcement. Guangdong plant on hold. Mitigant: China is excluded from the €300M EBITDA 2028/29 target; it is free optionality if the market recovers.
3. US zinc refining turnaround: Different business model (600 employees vs. 60 in recycling, 1-5% EBITDA margins vs. 20%+, solvent extraction technology not Waelz). If the turnaround stalls, it remains a €15M annual drag. Mitigant: management explicitly says no intention to replicate this in other markets; it makes sense at the $47M purchase price as vertical integration for US WOx, but it is not core.
4. European steel weakness: EU steel production at 5-year lows. But Befesa’s European EAFD throughput has remained stable because EAF producers (Befesa’s customers) are the most resilient part of the steel industry. EAF share in Europe is 45% and rising to 57%.
Formerly Harsco Corporation. Provides environmental services to the steel industry including slag management, materials recycling, and industrial cleaning. EAF dust recycling is one segment within a larger environmental services portfolio. Unlike Befesa, Enviri is not a pure-play on EAFD recycling. Revenue ~$1.8B but EAFD is a minority. Useful as a comp for understanding the broader steel services market but not a direct peer on the recycling thesis.
The dominant EAFD recycler in Mexico and Latin America. Strong position in a growing market (Mexico’s EAF steelmaking is expanding via nearshoring). If you wanted pure EM exposure to this thesis, Zinc Nacional would be ideal, but it is private. Ternium and Deacero are building new EAF capacity in Mexico (Pesqueria and Saltillo/Celaya), which expands Zinc Nacional’s addressable market.
Japan’s largest steelmaker processes its own EAF dust internally. This is common in Japan and Korea where large integrated steelmakers prefer to control their own waste streams. Not a competitor to third-party recyclers like Befesa, but relevant as a reminder that some markets are partially self-served.
This is the primary growth driver. Global EAF penetration is rising from 29% (2024) to a projected 40% by 2030 and potentially 50%+ by 2050. Every percentage point increase in EAF share generates proportionally more EAF dust that must be recycled.
The math is straightforward: global crude steel production is approximately 1.9 billion tons. At 29% EAF share and 17.5 kg of dust per ton, that is approximately 9.7 million tons of EAF dust. At 40% EAF share (2030), it rises to approximately 13.3 million tons. A 37% increase in addressable volume from this single driver alone.
The EAF transition is strongest in the EU (45% → 57% by 2030), driven by the European Green Deal and net-zero targets. In the US, EAF is already dominant (70%+) but capacity is still growing via 18 announced new EAF plants totaling 20 million tons. In China, EAF is only 10% but the government targets 15% by 2025 and 30% by 2035. China alone could eventually generate more EAF dust than Europe does today.
Environmental regulation for hazardous waste only moves in one direction: stricter. The EU’s Circular Economy Act (Q3 2026) will further restrict landfilling. China reclassified EAF dust as hazardous in 2017 and is gradually strengthening enforcement. Developing countries are following the EU/US model as they industrialize.
Every new regulation or enforcement action expands the captive market for recyclers and raises barriers to entry for competitors.
Zinc demand is supported by the energy transition (galvanized steel for wind towers, transmission infrastructure) and the EV transition (aluminum demand for lightweighting drives aluminum smelting, which drives salt slag generation). The C90 production cost floor has grown at 6% CAGR over 15 years, providing structural price support.
Befesa’s US zinc refinery is the only facility in the world producing “green zinc” from 100% recycled material. As Scope 3 emissions reporting becomes mandatory and manufacturers face pressure to demonstrate circular supply chains, recycled zinc could command a premium over primary zinc. This is speculative but directionally positive.
China’s real estate downturn is in its 5th year, depressing construction steel demand and EAF utilization rates (30% vs. 70% pre-COVID). This directly impacts Befesa’s Chinese operations, which are at 50% utilization and breakeven. If the crisis persists, the €90M invested in China remains a sunk cost with minimal return.
European steel production at 5-year lows, European automotive industry weak (impacting secondary aluminum demand). This is cyclical rather than structural. Befesa’s European operations have maintained throughput, but further deterioration could pressure utilization and gate fee pricing power.
Zinc is trading near $2,800-3,000/t in early 2026, roughly mid-cycle. Morgan Stanley forecasts $2,900/t average for 2026. New mine supply coming online (Romina, Rosh Pinah 2.0, Gediktepe, Gamsberg expansion) could create surplus from mid-2026, pressuring prices. Befesa’s hedging at €2,640-2,655/t through 2026 mitigates this, but 2027+ is unhedged and a potential headwind.
Hydrometallurgical processes could eventually challenge the Waelz kiln’s dominance. If a lower-cost, lower-emissions process achieves commercial scale, it could erode incumbents’ technology moat. However, no alternative has demonstrated commercial viability at scale, and the Waelz kiln’s 70+ year track record makes displacement a multi-decade rather than multi-year risk.
This industry is both cyclical and secular. The cyclical component comes from zinc prices and steel production volumes. The secular component comes from EAF penetration growth and regulatory expansion.
Where are we now (April 2026)?
Assessment: This is an early-cycle recovery entry point. Earnings have bottomed and are inflecting upward, the highest-returning growth project (Palmerton) is in commissioning, the biggest drag (US zinc refining) is in final-stage turnaround, and the hedging book locks in €20M+ of incremental EBITDA in 2025. The China optionality is free. The stock is near its 52-week high but 35% below its 2021 peak.
There is essentially one listed pure-play: Befesa (BFSA.DE). The rest of the industry is either private, in-house at steelmakers, or a small segment within a diversified conglomerate. This is both an advantage (monopoly on public market exposure to the thesis) and a risk (no portfolio diversification within the sector).
Tier 1: Core Holding
Befesa (BFSA.DE) — The only public vehicle for this thesis. Buy at current levels (EUR ~34) for a base-case 15% IRR over 5 years, with upside to 20%+ if China recovers or zinc rallies. Margin of safety from hedging book, Palmerton ramp, and zinc refining turnaround. Management’s €300M EBITDA target by 2028/29 implies significant EPS growth from here.
Tier 2: Tangential Exposure
Nucor (NUE) and Commercial Metals Company (CMC) — US EAF steelmakers that are major customers of Befesa and beneficiaries of the same EAF transition. Their growth creates Befesa’s growth. Useful as portfolio complements but not direct plays on the recycling thesis.
Enviri Corporation (NVRI) — Diversified steel services. Partial exposure to EAFD recycling. Lower conviction because EAFD is not the dominant business.
Tier 3: Watchlist
Zinc Nacional — Would be the second-best pure-play if it were public. Watch for an IPO or M&A activity.
Chinese EAFD recyclers — If enforcement strengthens and the real estate crisis ends, there will be opportunities in China’s nascent EAFD recycling industry. No investable public names yet.
What is the actual relationship between EAF dust zinc content and the shift toward DRI-EAF steelmaking? DRI-fed EAFs use less scrap (and therefore less galvanized scrap), which could mean lower zinc content in dust. Does this structurally impair recycler economics?
How real is the “green zinc” premium? If manufacturers start paying more for recycled zinc with documented lower carbon footprint, Befesa’s US refinery could go from a drag to a differentiator. Monitor Scope 3 reporting mandates and buyer procurement policies.
What happens when Befesa’s debt matures in July 2029? The TLB refinancing will depend on where EBITDA and leverage stand. At the target x2.0-2.5 leverage, refinancing should be straightforward. But if China or the US disappoints, the leverage picture could be tighter.
Who covers Befesa with the best analysis? Check for coverage from Berenberg, Kepler Cheuvreux, and Stifel, which tend to have deep European mid-cap industrials teams.
What is the real utilization ceiling for Waelz kilns? Befesa targets 90%+ in Europe but runs at 92%. Is there room to push higher, or is 90-92% the practical maximum given maintenance shutdowns?