---
title: "Blast-furnace gas cleaning"
description: "Blast-furnace gas cleaning is the multi-stage flue-gas treatment train that removes particulate from the blast furnace's top gas before the gas is used as a fuel in the steelworks' downstream boilers and stoves. The high pressure and high dust loading of blast-furnace top gas demand a sequence of progressively finer cleaning steps:"
canonical_url: "https://sylio.co/glossary/blast-furnace-gas-cleaning"
last_updated: "2026-06-28T02:29:40.176Z"
---

**Blast-furnace gas cleaning** is the multi-stage flue-gas treatment train that removes particulate from the blast furnace's top gas before the gas is used as a fuel in the steelworks' downstream boilers and stoves. The high pressure and high dust loading of blast-furnace top gas demand a sequence of progressively finer cleaning steps:

<table>
<thead>
  <tr>
    <th>
      Stage
    </th>
    
    <th>
      Equipment
    </th>
    
    <th>
      Function
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      1
    </td>
    
    <td>
      <a href="/glossary/dust-catcher">
        Dust catcher
      </a>
    </td>
    
    <td>
      Large inertial separator removing coarse particulate
    </td>
  </tr>
  
  <tr>
    <td>
      2
    </td>
    
    <td>
      <a href="/glossary/venturi-scrubber">
        Venturi scrubber
      </a>
    </td>
    
    <td>
      High-energy wet scrubbing for fine particulate
    </td>
  </tr>
  
  <tr>
    <td>
      3
    </td>
    
    <td>
      <a href="/glossary/wet-esp">
        Wet ESP
      </a>
    </td>
    
    <td>
      Final polish for sub-micron particulate
    </td>
  </tr>
</tbody>
</table>

## Sonic-horn duty

[Sonic horns](/glossary/sonic-horn) on the dust-catcher hopper prevent bridging of the coarse iron-oxide dust. Some installations also use horns on the wet-ESP sludge handling hoppers.

## Related terms

- [Dust catcher](/glossary/dust-catcher)
- [Venturi scrubber](/glossary/venturi-scrubber)
- [Wet ESP (WESP)](/glossary/wet-esp)
- [Sonic horn](/glossary/sonic-horn)