Category

Theme images by Storman. Powered by Blogger.
Best viewed in Google Chrome

Labels

Labels

Advertisement

Popular Posts

Services

Showing posts with label Refractory Glossary. Show all posts
Showing posts with label Refractory Glossary. Show all posts

Glossary of Refractory Terms and related Products name starting with alphabet G

- No comments
Refractory Technology Terms
[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]
Ganister
(a) A silica rock formed by deposition of dissolved silica in the siliceous seat-earth of coal-seams.
(b) A dense, high-silica rock (quartzite), suitable for the manufacture of silica brick. Confusion sometimes results from the use of this term because it is also applied, in some parts of the USA, to the crushed firebrick or to mixtures of either crushed firebrick or silica rock with clay, for use in tamped linings.
Gate or Stopper
Movable piece used to control the flow of glass into a revolving pot of a suction-fed machine.
Gathering hole
An opening in the breast wall through which glass is gathered.


Git or Sprue
The metal which solidifies in the hollow casting-pit refractories, at the end of teeming.
Gob
A portion of molten refined glass which is either delivered by feeder or gathered on a gathering iron for fabrication on to a glass object.
Grading
Used in three senses:
1. Texture: grain-size distribution of a mix.
2. Grain-size analysis: process of separating a mixture of particles into definite size fractions, for the purpose of determining their proportions.
3. Blending: mixing together of different sized grains to obtain a desired texture.
Green strength
Mechanical strength of a ceramic product in the green state.
Grog
(a) Used or unused firebrick crushed and then used as a non-plastic material.
(b) Crushed firebrick or other calcined or fused materials (used or not used) for incorporation in a batch as a non-plastic material. The term is sometimes used to include a Chamotte.
(c) Burned refractory material usually calcined clay or crushed brick, added to a brick or mortar mix or sometimes castable to reduce shrinkage in drying and firing.
Ground fireclay mortar
A refractory mortar consisting of finely ground fireclay.    
Grout
A suspension of mortar material in water, of such consistency that when it is poured upon horizontal course of brick masonry, it will flow into vertical open joints.
Guard ring
(a) In various methods of measuring thermal conductivity, the test piece on which the measurement is made is placed centrally in the apparatus and is surrounded by a guard ring.
(b) A device for maintaining a unidirectional flow of heat through the test piece, in the measurement of thermal conductivity.
Click below for Refractory Terms (Refractories | Definitions) starting with alphabet -
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

Refractory Terms and Definitions of its related products name starting with alphabet F

- No comments
REFRACTORIES & RELATED TERMS, DEFINITIONS
[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).

Click below for Refractory Terms (Refractories | Definitions) starting with alphabet -
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

Glossary of Refractory Terms starting with alphabet E - Definitions of Refractories and related materials

- No comments
REFRACTORY LINING TERMS
 [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]
Elutriation
A process of particle size separation in which particles of a given size are carried upwards by a stream of fluid moving at a constant velocity.
End arch or Wedge
A brick in which the large faces are inclined towards each other in such a way that one of the end faces is narrower than the other.
End face
In a standard square, one of the faces is bounded by the two shortest dimensions.
End feather or Feather end
A brick, one of the large faces of which is inclined from the top of one end face to the bottom of the opposite one, where the thickness is reduced normally to zero.


End skew
A brick in which one end face makes an angle of 60O with one of the side faces and 120O with the other which of reduced length.
Erosion of Refractories
Wearing away of refractory surfaces by the washing action of moving liquids and gases.
Eutectic temperature
The lowest melting temperature in a series of mixtures of two or more components.  
Exfoliation
The property possessed by certain materials, for example vermiculites and hydro-biotites, when submitted to sudden heating, to expand permanently in a direction parallel to the C-axis, forming a laminar texture.
Expansion joint
Space left in brick-work to accommodate the expansion which occurs on heating the furnace.
Click below for Refractory Terms (Refractories | Definitions) starting with alphabet -

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

Refractory related terms starting with alphabet D - Refractories Definitions

- No comments
REFRACTORY LINING | REFRACTORIES GLOSSARY 
 [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]
Damper
A device for regulating the passage of gases.
Dead-burned
The state of a basic refractory material resulting from a heat treatment that yields a product resistant to atmospheric hydration or recombination with carbon dioxide. However, in common use this term is applied to a material that has been made as inert and stable as possible by appropriate heat treatment.
Dead-man
The inactive mass of burden resting on the center of the hearth bottom.

Devitrification
Formation of crystals in a vitreous material.
Dilatancy
The property due to which certain materials become fluid when allowed to stand and less fluid when stirred; the stirring usually results in an increase in volume.   
Direct bonded basic brick
A fired refractory in which the grains are joined predominantly by a solid state diffusion mechanism. The term “Direct Bond” was initially applied to fired magnesite-chrome refractories.  
Dobie
A moulded block of ground clay or other refractory material, usually crudely formed and either raw or fired.
Doghouse
(1) A small arched chamber in the end wall, through which is inserted a metallic fuel burner. (2) A small extension of a glass tank furnace into which the batch is fed.
Dolomite
The double carbonate of calcium and magnesium, CaCO3.MgCO3 (This mineral is the principal constituent of dolomitic rocks which are also referred to as dolomites. The term ‘dolomite’ is sometimes, incorrectly used to denote doloma.)
Dome
A roof in the shape of a segment of a sphere.
Dome brick
A brick in which the large and the side faces are inclined towards each other in such a way that, with a number of these bricks, a dome can be constructed.
Dot
A small refractory support used for separating cranks and setters.
Double-Screened ground refractory materials
A refractory material that contains its original gradation of particle sizes resulting from crushing, grinding or both, and from which particles coarser and finer than two specified sizes have been removed by screening.
Downtake
The passage (usually vertical) extending from the ports to the slag pockets; also called uptake.
Dozzle
Refractory material or insulation at the top of an ingot mould, designed to maintain a reservoir of molten metal until the main part of the ingot has solidified completely. When the refractory is made in one piece, it is called a Core or Dozzle and is usually pre-heated before use.   
Drop arch
An auxiliary arch below the inner surface of the main roof.
Dross
See Clinker.
Duct or Smoke pipe
It is a brick or metal flue.
Dutch oven
A combustion chamber built outside and connected with a furnace.
Click below for Refractory Terms (Refractories | Definitions) starting with alphabet -

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

Glossary of Refractory Terms starting with alphabet C

- No comments
REFRACTORY LINING TECHNOLOGY TERMS
[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]
Calcination
Heat treatment intended to produce physical or chemical changes in certain raw materials, preparatory to further processing or use for the purpose of eliminating volatile chemically combined constituents and producing volume changes.
Campaign
The working life of a furnace between major repairs.
Car deck
Refractory top of a car for the support of the ware in a tunnel kiln or truck chamber kiln.
Carbon refractory
A manufactured refractory comprised substantially or entirely of carbon (including graphite).
Carburettor
The refractory lined chamber of a water gas plant, often filled with checkers on which oil is sprayed for enrichment of the water gas.
Castable refractory
A mixture of refractory aggregate and suitable bonding agent (heat-resisting hydraulic cement) that, after the addition of a proper liquid, is generally poured into a place to form a refractory shape or structure which becomes rigid because of chemical action.
Casting slip
Generally a stable suspension of clay in water with or without inclusion of other materials. This term can also denote other stable suspensions, e.g. of alumina.
Catenary arch
A sprung arch which is part of a hollow cylinder having the shape of an inverted Catenary.


Center brick or Crown brick
Hollow refractory block which distributes molten steel from the trumpet assembly to the runner bricks.
Ceramic bond
The vitreous or crystalline material, formed on firing, between the coarser constituents of a ceramic body and giving cohesion and mechanical strength to the fired product.   
Cermet
A composite material containing both ceramic and metallic constituents.
Chamotte
Refractory clay that has been specially fired for use as a nonplastic material.
Chequer or Checker
Bricks or shapes set in such a way that the hot gases can pass between them; the filling of a regenerator chamber.   
Chrome-magnesia refractory
A refractory brick, which may be burned or unburned, made from a mixture of chrome ore and dead-burned Magnesite (the chrome ore predominating).
Chrome spinel
A spinel in which the trivalent metal is chromium, e.g. (Mg, Fe)O.Cr2O3
Cinder notch or Slag notch
A hole in the hearth wall which is opened to allow molten slag to flow from the furnace.
Circle brick
A brick, the two large faces of which are parts of concentric cylinders.
Clinker
(a) Fused or partially fused fuel ash which may contain some incompletely burned fuel. (b) Hydraulic cement before being crushed or ground. (c) a dead-burned product / usually stabilized dolomite. 
Closer or Soap
A brick of the same length as a standard square but of smaller thickness and/or breadth, with end faces square or nearly square. 
Cold crushing strength (CCS)
The ultimate load per unit area, at room temperature, that a refractory will withstand before it is crushed.
Cold set
The hardening or setting of a refractory mortar which takes place at room temperature. Bonding mortars containing agents which give them greater strength after drying than is obtained with a clay or other refractory base alone are said to be air-setting or cold-setting. 
Collar
A short fire clay section of a horizontal retort which is placed between the main silica portion and the mouth piece.
Compo
A refractory composition used in the casing pit for ramming purposes.
Cone (refractory)
Hollow refractory shape used in bottom pouring, through which the liquid steel passes from the runner brick into the ingot mould. When made in one piece with the runner brick, it is known as riser brick or an end runner
Congruent melting
The change of a substance, when heated from the solid form to a liquid of the same composition. The melting of ice is an example of congruent melting. 
Corbel
An arrangement of bricks in which each course projects beyond an adjacent course.
Course
A horizontal layer or row of bricks in a structure.
Crank
A composite refractory structure which supports and separates a number of pieces of flat-ware during glost and decorating fire.  
Crazing
A network of surface cracks.
Creep
Isothermal deformation of a stressed product as a function of time.
Cross wall
One of the brick partitions bracing horizontal retorts and arranged inside the setting.
Crown
A term sometimes used for a furnace roof.
Crown brick
See Bullhead.
Cupola brick
See Bullhead.
Curtain arch
Refractory arch supporting the wall placed between a gas producer and the gas uptake.
Curtain wall
A suspended horizontal structure, fixed or movable, which separates the combustion space of a flat glass furnace into two zones.


Click below for Refractory Terms (Refractories | Definitions) starting with alphabet -
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