Selection

 


Capital Refractories has pioneered the recent use of gas diffusers in foundries. Capital has un-beatable quality and support.

The plug is best located below the surface of the lining.

Gas diffusers for use in induction furnaces are available in a range of qualities, sizes and fittings. The choice depends on the lining thickness. The standard range for induction furnaces is made with Caperdiff 94 AL (a high alumina quality) and stainless steel cans and are usually available from stock (except IF 6).

Gas Diffusers for Induction Furnaces

Gas Diffuser Model
Lining Thickness
Name*
Drawing No.
/ mm
/ "
MINI
7204
< 75
< 3
IF 1.5
7220
< 75
< 3
IF 2
7205
75 - 100
3 - 4
IF 3
7206
100 - 150
4 - 6
IF 4
7207
150 - 200
6 - 8
IF 6
7217
200 - 250
8 - 10
IF 8
7228
> 250
> 10

* The name: IF refers to induction furnace and the number is the nominal size in inches.

Duplex Gas Diffusers for Induction Furnaces

Gas Diffuser Model
Lining Thickness
Name
Drawing No.
/ mm
/ "
DP 2
7235
75 - 100
3 -4
DP 3
7236
100 - 150
4 - 6
DP 4
7237
150 - 200
6 - 8


Ladle gas diffusers

Gas Diffuser Model
Specification
Drawing No.
Diameter
/ mm
Height
/ mm
Pipe
/ mm
Type
7129
95
104
50
Directional
7162
106
165
190
Directional
7121
100
206
110
Directional
7123
100
206
120
Permeable
7196
100
206
150
Permeable
7113
97
206
370
Permeable
7264
110
140
110
Permeable
7110
110
151
38
Permeable
7254
110
160
75
Permeable
7120
110
151
90
Permeable
7125
182
120
52
Permeable
7241
182
120
200
Permeable


Aluminium Furnace Gas Diffusers

Gas Diffuser Model
Specification
Drawing No.
Diameter
/ mm
Height
/ mm
Pipe
/ mm
Can
7240
158
279
355
Stainless Steel
7119
158
279
371
Inconel
7229
158
282
Socket
Stainless Steel
7232
229
340
45
Stainless Steel
7264
229
340
185
Short Can
7164
229
340
465
Stainless Steel
7127
229
340
685
Inconel


Miscellaneous Gas Diffusers

Gas Diffuser Model
Specification
Drawing No.
Diameter
/ mm
Height
/ mm
Pipe
/ mm
Type
7232
46
64
37
Directional
7114
46
64
37
Permeable
7219
48
130
38
Permeable

To avoid confusion it is recommended to include the drawing number on any order.

Caperdiff 94 AL is one of a range of qualities designed for use The quality of the plug depends on the application.

Caperdiff 96M Pressed and fired permeable magnesite diffuser for general ferrous foundry applications.
Caperdiff 94BN Pressed and fired high strength permeable chromia-enriched alumina diffuser for both ferrous and non ferrous application.
Caperdiff 94AL Pressed and fired permeable alumina diffuser for both ferrous and non ferrous application. A high strength product where mechanical damage (cleaning) may be an issue, together with a low pore size to give a finely dispersed bubble swarm.;
Caperdiff 90ALR Pressed and fired permeable alumina diffuser designed specifically for aluminium applications. A high strength product whose chemistry and physical properties have been modified to resist penetration by aluminium yet permit sufficient gas flow for effective treatment of the melt. Can be utilised for inert gas stirring or reactive purging with chlorine.
Caprax 98 DP A low cement 1850ºC cast directional or channel porosity diffuser with gas passageways of predetermined number and cross section. The channels are contained within a dense cast refractory body designed for optimal wear resistance in service.
Caprax AS DP A low cement, alumina-mag spinel directional or channel porosity diffuser, for application in steel ladles where there is an aggressive slag environment.