Furnace gas

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Blast furnace gas extraction and scrubbing at blast furnace 3 of the former Henrichshütte

Blast furnace gas ( blast furnace - gas ) is a flammable dome gas from considerable amounts of nitrogen of about 45-60% and carbon dioxide of about 20-25% and of small amounts of the combustion gases carbon monoxide of about 20-30% and hydrogen of about 2- 4% with a low calorific value of 3.35–4 MJ / m³.

Historic machine powered by furnace gas (photo from 1905)

It is at the upper end of the shaft of the blast furnace - of Gout - drawn off and purified in a top gas scrubber, mainly suspended particles are removed. The blast furnace system uses the furnace gas to drive compressors for the air blown into the blast furnace, the wind, and to heat it up in the blast furnace . Some smelting works use the dedusted furnace gas to generate process steam to generate electricity by means of steam turbines . The furnace gas was formerly also used as a fuel z. B. for double-acting tandem large gas engines with generators to generate electricity, the heating of annealing and heating furnaces and for the underfiring of systems, especially coke ovens .

Because of its carbon monoxide content, furnace gas is very toxic. Therefore, special precautionary measures apply when staying in the vicinity of furnace gas lines.

The LanzaTech company uses a bioreactor and unspecified bacteria to produce ethanol from blast furnace gas.

See also


Web links

Wiktionary: gout gas  - explanations of meanings, word origins, synonyms, translations

Individual evidence

  1. to be seen in the world cultural heritage Völklinger Hütte
  2. wiwi green innovation: microorganisms turn steelworks into fuel factories