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Forehearth

   Also found in: Encyclopedia 0.03 sec.
Fore´hearth`
n.1.(Metal.) The forward extension of the hearth of a blast furnace under the tymp.


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Primary Ductile Iron Melting & Holding (by % of foundries) Melting Large Foundries Small Foundries Cupola 1978 1988 1998 1978 1988 1998 Acid Slag 26 42 20 20 2 6 Basic Slag 13 15 3 5 0 2 Neutral Slag NA 4 7 NA 2 0 Coreless 45 38 62 44 84 83 Arc 15 4 1 13 6 0 Channel 15 4 12 22 22 8 Other 0 0 0 0 2 3 Holding Channel 30 46 43 7 24 7 Coreless 6 15 11 5 10 3 Arc 9 8 0 2 0 0 Forehearth NA 15 5 NA 0 1 Other 9 8 5 5 2 2 Table 2.
This integrated information system collects and presents data from all steps in bottle making - batch, furnace, forehearth, mold shop, forming, lehr, inspection and packing.
Millis credited Lynchburg Foundry with pioneering the basic cupola, carbide injection in the forehearth and use of the shaking ladle.
 
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