Ash Melting

Gasification leaves behind an ash that still contains minerals, glass and residual metals. Ash melting takes that fraction a decisive step further: heating it to the point of fusion so the minerals form a molten slag that cools into a dense, glassy, chemically stable material.

The transformation is not cosmetic. A vitrified slag is inert and non-leaching, locking the mineral content into a form that meets strict environmental standards instead of leaving a dusty, reactive ash that still needs landfilling.

From Ash to Aggregate

At Klean’s automotive-shredder-residue reference plant, the molten glass product meets Japan’s stringent soil standards and, after grinding, is sold to the construction industry as asphalt filler. The same logic applies to the metals: they concentrate and are recovered through the melting step rather than being lost in the ash.

Ash melting completes the material balance of gasification. Energy leaves as power, metals leave as commodity, and the mineral fraction leaves as product — leaving essentially nothing to landfill from the inorganic remainder.

Why Stabilisation Matters

Stabilisation is the difference between processing and merely rearranging. A process that produces a sellable aggregate from the mineral fraction changes the project’s economics — turning a residue-handling cost into another output with value.

Learn More About Ash Melting Technology

• Automotive Shredder Residue Gasification Plant
• Solid Waste Recycling
• What Is Gasification?
• Feasibility Studies

Partner With The KleanTeam to Stabilise the Ash

Safe. Clean. Profitable. One Proven Partner.

Klean Industries builds ash-melting into its gasification plants so the mineral fraction of shredder residue becomes a saleable aggregate — proven by a reference facility whose molten glass product is sold to construction.

Klean’s Key Advantages:

• ✅ An operating ASR gasification reference plant with ash-melting vitrification.
• ✅ Thirty-plus years engineering commercial gasification and waste-to-energy plants.
• ✅ 3 recovered carbon black (rCB) plants built in India over the past 2 years.
• ✅ KleanLoop blockchain provides end-to-end feedstock traceability.

Ready to turn ash into aggregate instead of disposal?

Speak with a Solid Waste Expert at Klean Industries » GO.