What colour contamination limits apply to cullet?

Container glass cullet is colour-separated: clear (flint), green, and amber. Cross-contamination of <1% is typically acceptable for clear glass furnaces. Flat glass cullet is colour-neutral.

Are spent refractories hazardous waste?

Silica and alumina refractories (16 11 04) are non-hazardous. Carbon-bonded refractories (16 11 02*) are hazardous due to polycyclic aromatic hydrocarbon (PAH) content and require licensed handling.

We use cookies to improve your experience and save your reports. Privacy Policy

Valorize Glass Manufacturing Residues & Cullet Waste

Name: SymbioFlows Platform
Availability: InStock
Author: SymbioFlows

Glass cullet saves 2–3% energy per 10% substitution. SymbioFlows connects glass manufacturers with cullet buyers and spent refractory receivers to close the loop.

Get Your Valorization Report

2–3%

Energy saving per 10% cullet use

src: Glass Alliance Europe

~76%

EU glass cullet recycling rate

src: FEVE 2022

€5–20/t

Cullet premium vs virgin batch

src: market avg

60–85%

Spent refractory silica content

src: industry data

Key Waste Streams — EWC Codes & Buyers

EWC Code	Material	Description	Who Buys It
10 11 12	Glass Waste (non-hazardous)	Off-spec glass, cullet from forming lines, and packaging breakage.	Flat glass and container glass manufacturers (closed loop)
10 11 11*	Hazardous Glass Waste	Lead crystal, CRT glass, and glass with hazardous compounds.	Licensed hazardous glass processors
10 11 09	Waste Preparation Mixture	Off-spec batch material — sand, soda ash, feldspar blend.	Ceramic producers, aggregate producers
16 11 02*	Spent Refractories (Carbon-based)	Spent carbon-bonded refractories from glass tanks.	Refractory manufacturers, ceramics
16 11 04	Other Spent Refractories	Silica and alumina bricks from furnace relining.	Refractory manufacturers, slag-making, road sub-base