---
title: "Sintering (deposit)"
description: "Sintering, when applied to fouling deposits, is the bonding-together of particles into harder consolidated layers under sustained temperature. A fresh deposit is friable and easy to remove; an aged deposit on a hot tube surface gradually fuses into a bonded film that resists all but the most aggressive cleaning."
canonical_url: "https://sylio.co/glossary/sintering-deposit"
last_updated: "2026-06-28T02:29:32.039Z"
---

**Sintering**, when applied to fouling deposits, is the bonding-together of particles into harder consolidated layers under sustained temperature. A fresh deposit is friable and easy to remove; an aged deposit on a hot tube surface gradually fuses into a bonded film that resists all but the most aggressive cleaning.

## Why early intervention matters

The asymmetry between fresh and sintered deposit cleanability is the underlying argument for continuous acoustic cleaning. A fresh dust layer responds to a single [sonic-horn](/glossary/sonic-horn) pulse; the same dust two days later may resist a full steam-sootblower cycle; two weeks later only water-washing during an outage removes it.

## Temperature drives sintering rate

- Below 600 °C — sintering is slow; deposits remain friable for days
- 600–800 °C — sintering accelerates; friable phase lasts hours
- Above 800 °C — sintering is rapid; partly molten components bond on contact

This temperature-driven asymmetry is why [recovery boilers](/glossary/recovery-boiler), [WtE](/glossary/waste-to-energy) boilers and high-AFR [cement plants](/glossary/preheater-tower) — all running at the higher end of these ranges — benefit most from continuous cleaning.

## Related terms

- [Fouling](/glossary/fouling)
- [Slagging](/glossary/slagging)
- [Low-melt sticky ash](/glossary/low-melt-sticky-ash)
- [Sonic horn](/glossary/sonic-horn)