Forehearth


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Fore´hearth`


n.1.(Metal.) The forward extension of the hearth of a blast furnace under the tymp.
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works on manufacturing and design process (technical) documentation for the repair of the cooking and a glass melting furnace forehearth parts 6 for the production of glass-glass brand XT-1
The product line includes specialty frits and grits (finely-milled frits), glazes, digital inks and other specialized tile coatings, and forehearth color solutions.
Additionally, Vetriceramici has developed high-value forehearth color solutions that deliver greater production flexibility, lower manufacturing costs and improved inventory management to customers.
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.
Crude lead and discard slag are tapped continuously from this furnace through a single taphole and separated in a conventional forehearth.
When the glass leaves the refiner it enters the forehearth, which is a channel typically 3 feet wide by 18 to 20 feet long.
In the new plant, lead and discard slag are separated using a conventional forehearth arrangement rather than being tapped together into molds; waste-heat boilers are used rather than evaporative gas-coolers, decreasing water content of the off-gas and thus baghouse sizes, and producing high-pressure steam for power generation; and reduction coal is injected down the lance rather than dropped into the furnace.