What is blast furnace slag worth?

GGBS trades at €8–25/tonne depending on specification and logistics. That compares to a landfill cost of €20–60/tonne, making valorization strongly positive.

Is EAF dust hazardous waste?

Yes — EAF dust is classified 10 02 07* (hazardous) due to zinc and lead content. Waelz kiln operators are the primary licensed receivers. SymbioFlows only matches with fully permitted facilities.

Can I sell mill scale directly?

Mill scale (10 02 10) is non-hazardous and trades freely. Sinter plants and cement works are the main buyers. Minimum lots are typically 50–200 tonnes.

How does SymbioFlows handle compliance?

Our platform verifies receiver waste permits, generates compliant transfer documentation, and flags cross-border movement requirements under the EU Waste Shipment Regulation.

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Turn Steel By-Products Into Verified Revenue Streams

Name: SymbioFlows Platform
Availability: InStock
Author: SymbioFlows

SymbioFlows connects steel producers with verified buyers for slag, mill scale, EAF dust, and oily sludge — fast, compliant, AI-matched.

Get Your Valorization Report

~200 kg

Slag generated per tonne steel

src: Euroslag 2023

90%+

EU slag valorization rate

src: Euroslag 2023

€8–25/t

Slag value vs landfill cost

src: industry avg

800 kg/t

CO₂ saved replacing clinker

src: GCCA

Key Waste Streams — EWC Codes & Buyers

EWC Code	Material	Description	Who Buys It
10 02 01	Processed Blast Furnace Slag	Ground granulated blast furnace slag (GGBS) — direct cement substitute.	Cement & concrete producers
10 02 02	Unprocessed Slag	Steel slag aggregates for road base and asphalt.	Road construction, aggregates
10 02 10	Mill Scale	Iron oxide flakes from hot rolling — high Fe content (72 %+).	Sinter plants, cement kilns
10 02 07*	EAF Dust (hazardous)	Zinc and lead-bearing dust from electric arc furnaces.	Zinc smelters, Waelz kiln operators
10 02 14	Gas Treatment Sludge	Sludge from wet gas scrubbers.	Waste water treatment, cement
12 01 14*	Oily Machining Sludge	Metal swarf and coolant sludge from finishing operations.	Oil reclaimer, metal recovery