FURNACES with KANTHAL SUPER Heating Elements
up to 1800C

 
GENERAL FEATURES & DESCRIPTION :  

KANTHAL SUPER 1700, 1800 & 1900 grade Heating Elements vertically suspended in heating cavity.

 
Hot-face Super Refractory Mullite / Bubble Alumina insulation backed by low heat capacity refractory and fibrous insulations of different grades with fan cooling, ensure low skin temperature.
Thyristorised Circuitry with adjustable current limit and soft-start features for maximum protection to heating elements and for simple control of heat-up rate.  Adjustable over-temperature cut-out with audio signal ensure overall safety.  
Micro-processor based Digital PID Temperature Controller / Programmer with Thermocouple in Mullite / pure Alumina Sheath.  
   
PERFORMANCE :  
Temperature Control Accuracy within 1C of set point.  Temperature uniformity within 5C near T'max with soaking.  Element life of 300 to 1000 cycles derived under normal use on average.  Carefully engineered for rugged use and easy maintenance.  
   
CHAMBER type up to 1800C :

70C 15
 
Floor mounting structures with front-loading heating chamber having stainless steel sheet & painted M. S. paneling.  Insert type swing-aside parallel-moving Door.  Base Section houses the Transformer/s & Control Panel.  (Separate Control Panel for larger models). Table model for smaller sized furnaces.  
   
APPLICATIONS :  
Trial firing and P.L.C.A.R. Testing of Refractories ; Industrial R & D work ; Precision Batch firing for production of oxide & electronic ceramics and high temperature products.
 
   
CONCISE SPECIFICATIONS :  
T'max Model Cavity Size (mm) Hrs. to T'max

KW

W H D
1600°C 60C 9 150
200
300
3.0 8.0
60C 15 200
250
300
3.0 10.0
60C 35 250
300
450
4.5 12.0
60C 42 300
300
450
3.5 15.0
1700°C 70C 5* 125
150
250
3.0 4.5
70C 9 150
200
300
3.5 8.0
70C 15 200
250
300
3.5 10.0
70C 35 250
300
450
4.5 12.0
70C 42 300
300
450
3.5 16.0
70C 54 300
300
600
4.5 16.0
70C 96 400
400
600
5.0 20.0
1800°C 80C 4* 125
150
215
3.5 5.0
80C 14 175
250
300
4.0 10.0
80C 38 275
300
450
5.0 16.0
'*' denotes Table models
 
   
RAISING-HEARTH [ Ind.Pat.No.149612 ] type up to 1700C :  
Platform mounted frame structure with elevated Furnace section with its opening at the bottom only, closable by vertically moving Hearth raising the job into the heating cavity by manual mechanical means.  Transformer & Control Panel housed inside the frame structure.  Stirrer hole through roof and Gas Inlet Pipe, optional.  Eliminates hazards of top open Pit type furnace.  Ideal for melting in crucible and hot working operations like Thermal Spalling Tests. Safer, surer and more convenient handling of job/charge. Reduced risk of furnace damage, cheaper and easier maintenance.  No convectional heat loss during loading/unloading, so low drop of temperature and cooler ambience.  


CONCISE SPECIFICATION

T'max Model Cavity Size (mm) Hours to T'max KW
sq. Base Height
1600°C 60R 4 150 200 2.5 5.0
60R 10 200 250 2.5 7.0
1700°C 70R 4 150 200 3.0 5.0
70R 10 200 250 3.0 7.0
70R 20 250 325 4.0 10.0



70R 4
 
   
FAST-HEATING TYPE up to 1700C :  

New generation refractory fiber insulations for efficient heat insulation, low connected load and minimal thermal loss.  Two versions of T'max differ in insulations only.  Built-in Transformer & Control Panel.  Light-weight, compact and portable.  Fast heat-up to 1600C in 40 minutes only.  Faster cooling makes possible several cycles in a day.  Ideal for research scientists.

 
Caution : T'max to be limited to 1600C for non-intermittent use in 1700C models for
  longer insulation life
 
   
CONCISE SPECIFICATION
T'max Model Cavity Size (mm) KW

W

H D
1600°C 60F 4
150
150
150
3.5
60F 6
150
150
250
5.0
1700°C 70F 4
150
150
150
3.5
70F 6
150
150
250
5.0

70F 6
 
   
TUBE (horizontal) type :  
for controlled atmosphere sintering, etc. up to 100mm bore x 300mm hot zone for temperatures up to 1700C.

Coal Ash Fusion Test up to 1550C as per IS:1355-1959.
 
   
NOTABLE USERS OF 'OKAY' KANTHAL SUPER FURNACES :  

So far, almost 250 Kanthal Super Furnaces have been supplied throughout India, the Notable Users [no. of furnaces in ( )] being :

Associated Cement Cos.Ltd., Katni & Nagpur (3) ;
Dept.of Atomic Energy: BARC/Mumbai, VECC/ Kolkata (2) ;
Bharat Heavy Elec. Ltd., Bangalore, Jagdishpur, Hyderabad (5) ;
Bharat Refractories Ltd. (4) ;
Carborundum Universal Ltd. (7) ;
Central Glass & Cer. Res.Inst., Kolkata (8) ;
Cera-Tech Industrial Ceramics, GIDC, Surat (5)

College of Ceramic Technology, Kolkata (5) ;
Def. Met. Res. Lab., Hyderabad (10) ;
Indian Aluminium Co. Ltd., R&D Cen., Belgaum (6) ;
Indian Inst. of Tech., Bombay\Guwahati\Kanpur\Kharagpur (15) ;
Maithan Ceramic Ltd.(3) ; OCL India Ltd., Rajgangpur (2) ;
Opaque Ceramics Pvt. Ltd., Himatnagar (4)

Orient Abrasives Ltd., Bhiwadi\Porbandar (3) ;
National Institute of Technology, Rourkela (3) ;
Regional Research Lab., Jorhat (3) ;
Res. & Dev. Centre for I. & S., SAIL, Ranchi (3) ;
Shri Natraj Ceramic & Chem. Ind. Ltd., Dalmiapuram\Khambhaliya (5) ;
VRW Refractories, Chennai\Ahmedabad (3).

 

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