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Updated: June 8, 2025
As regards the first of these advantages, it may be stated that the puddling of ordinary Ougree forge iron, which required with other furnaces 900 to 1,000 kilogrammes of coal, is now performed with less than 600 kilogrammes per ton of the iron produced. The puddling of fine grained iron which required 1,300 to 1,500 kilogrammes of coal is now done with 800.
All the results at Ougree have been obtained with 400 kilogramme charges, and the dimensions of the gas generators have been calculated for Six-Bonniers coal, which does not yield over 20 per cent. of gas. The advantages of this system, which permits of expediting all the operations of puddling, are as follows: 1. A notable economy in fuel, both as regards quantity and quality.
Since the year 1872, the large iron works at Ougree, near Liege, have applied the Bicheroux system of furnaces to heating, and, since the year 1877, to puddling. The results that have been obtained in this last-named application are so satisfactory that it appears to us to be of interest to speak of the matter in some detail.
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