REFRACTORIES & RELATED TERMS, DEFINITIONS
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[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]
Fantail or Fantail arch
Opening between the slag pocket and the regenerator.
Feather end
a brick, one of the side faces of which is inclined from the top of one end face to the bottom of the opposite one, where the thickness is reduced nominally to zero.
Feather side
A brick, one of the large faces of which is inclined from the top of one side face to the bottom of the opposite one, where the thickness is reduced nominally to zero.
Feed-end block
A refractory shape for use at the feed end of a rotary cement kiln.
Feeder
Mechanical system that produces gobs of glass for the forming machines.
Feeder channel
In container and pressed-ware furnaces, the part of the fore-hearth that carries the glass from the working end to the feeder mechanism.
Feeder nose or Feeder spout
Part of the feeder containing an opening in which orifice rings of various sizes can be fitted and forming the end of fore hearth.
Feeder sleeve or Feeder tube
Cylindrical tube surrounding the feeder plunger.
Feldspar
A natural mineral used for the vitrification of ceramic bodies in porcelain and earthenware manufacturing.
Firebox
One of the small chambers located wholly or partly in the wall of a kiln and in which the initial combustion of the fuel takes place.
Firebrick
A broad term covering any type of refractory brick used more narrowly to mean fireclay brick.
Fireclay
A clay which is resistant to high temperatures, and contains mainly kaolinitic clay minerals, free silica and only a small proportion of other impurities. It is plastic when sufficiently pulverized and wetted, rigid when sufficiently dried, and of suitable refractoriness for use in commercial refractory products.
Fireclay, Nodular
A rock containing aluminous or ferruginous nodules, or both bonded by fireclay.
Fireclay, Plastic or Bond
A fireclay of sufficient plasticity to bind non-plastic materials.
Fireclay, Plastic Refractory
A fireclay material tempered with water and suitable for ramming into place to form a monolithic furnace lining that will attain satisfactory physical properties when subjected to the heat of furnace operation.
Firestone
A siliceous rock used in the natural state without further processing, other than cutting, as a furnace lining material.
Flaking (Peeling / Shelling)
The loss of the part of the surface of a refractory material as a consequence of cracking behind the hot face.
Flare bed
The duct which conveys producer gas to the nozzles of the combustion chambers in a setting of horizontal retorts.
Flash wall
A continuous protective wall built within a kiln in front of the fireboxes.
Flexural strength
The nominal transverse breaking stress of a material.
Flint Fire clay
A hard or flint-like fireclay occurring as an unstratified massive rock, particularly devoid of natural plasticity and showing a concoidal fracture.
Floater
Piece of refractory which floats on the surface of the glass in a tank furnace, placed across the width of the furnace. It may be either a single piece extending across the furnace or two or more pieces so arranged as to be held together by the flow of glass.
Floor or Bottom
The refractory lining forming the base of the combustion chamber.
Flue
Duct constructed of brick or metal for the passage of gases.
Flux line or Metal level
The horizontal line around the inner surface of a tank furnace, corresponding to the upper surface of the molten glass.
Fore-hearth
The part or extension of a tank furnace from which glass is taken for forming.
Fused alumina, brown (BFA)
Fused in electric arc furnaces. Main raw material is a special (abrasive) grade of bauxite. During the fusion other oxides included in the bauxite (Fe, Ti, Si) are reduced to the desired level. Production can be described as fusing and refining process of bauxite.
Fused alumina, white (WFA)
Fused in electric arc furnaces. During fusion of abrasive grade alumina the physics of aluminum oxide are changed (higher density and different crystal structure and size).
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