Address : Plot No. 424,SIDCO Industrial Estate,Ambattur,
Chennai – 600 098, India
Call Us : +91-9840930370
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Bell Furnaces for WR

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General Manager:
General Manager
MR U SARAVANAN
+91 9840930370


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Bell Type Annealing Furnace for Wire Rod Coils


India’s No.1 supplier of bell furnaces.

We manufacture furnaces which can be made in electrical, oil or gas firing system as per the customers requirement.This type of furnace is widely used for the following applications such as:

  • Spherodised Annealing of Steel Wire Rod Coils
  • Soft Annealing of Steel Wire Rod Coils
  • Black and Bright Annealing of Steel Strips.
  • Normalising/ Stress Reliving Of Steel Castings.
  • Annealing Of Copper And Aluminum Products.
  • Decarburising Of Stampings.
  • Material: Low carbon, medium carbon, high carbon and alloy steel and bearing steel

Salient Features:

  • Batch capacity : 5 to 30T
  • Atmosphere : Liquid : Hydrocarbon & ultra pure nitrogen with automatic pressure control
    Option: Vacuum & nitrogen atmosphere.C
  • State of the art technology combined with low cost production to achieve Spheroidisation between 85% to 100% & almost achieving zero decarb.
  • Unique Hydro Carbon combustion system working in total auto mode system only for a very few hours (less than 2 hours ) to achieve the above specified Spheroidisation & decarb level .
  • Maximum temperature 800 C/850 C
  • Multi profile programme controller with ratio control system to achieve close temperature uniformity.
  • Auto programming facilities to adapt different cycles depending upon diameter – grade combination.
  • Provision for data logging.

USP of PRECONS bell furnaces:

  • Traditionally for many decades and even today, international bell furnace manufacturers deploy continuous purging of cracked ammonia, throughout the annealing cycle, to avoid decarburisation.
    This being an expensive process, involving not only consumable costs like ammonia, cracker catalysts etc, but also this involves a good amount of instrumentation associated with the system including expensive maintenance.
  • Precons, by its innovative technology, has successfully developed cracked hydro carbon gas purging system, only for a few hours as against continuous purging of cracked ammonia, thus cutting down enormous expenditure in each cycle and practically nil maintenance achieving almost nil decarburisation, after annealing.
  • Each bell furnace installation comes with state of the art temperature and Thyristor control systems and user friendly PLC and Scada display panels.
  • The consistent results and supplies to blue-chip customers like TVS, TI groups, steel mills like Sunflag, Jayaswal Neco, Usha Martin & many companies for the last two decades is the testimony of precons quality at affordable processing cost knocking off expensive traditional and conventional systems, presently being adopted by other international manufacturer.
  • Better,simple control system and user friendly.
  • Consistency in achieving above 90% spherodisation and nil decarb in all the spherodisation annealing cycles.
  • Project cost of our bell furnaces is at least 4 times less expensive.
  • Running cost and maintenance cost is very minimum.
  • Cost of Annealing is very competitive.
  • By its innovative technology, Precons has successfully developed cracked hydro carbon (Methanol) gas purging system in less than two hours out of total cycle time, thus utilizing less quantity of Methanol and lesser working hours for cracked furnace.
  • Precons furnaces operate with cracked Methanol gas & Nitrogen atmosphere.
  • Consumption of methanol is approx 1.6 to 2 Ltrs/ 30T batch and the cost of Methanol is approx Rs.45/litre in India, thus excellent cost cutting is achieved.
  • No continuous purging of Nitrogen & Nitrogen consumption is very much less as compared to Cracked Ammonia mechanism.
  • International furnaces operate with Ammonia & Hydrogen atmosphere throughout the cycle.They continuously purge Ammonia throughout the annealing cycle, to avoid decarburisation.Consumption of Ammonia is approx. 113 Kgs/batch (1 batch of 25MT) and cost of Ammonia is approx. Rs45/Kg in India.So this being an expensive process, involving not only consumable costs like Ammonia, cracker catalysts etc, but also involves a good amount of instrumentation associated with the system including expensive maintenance.
  • Methanol cracks easily because it’s a hydro carbon (CH3OH). It doesn’t need any catalyst whereas Ammonia (NH3) doesn’t crack automatically .It needs catalyst which need periodic replacement .So it needs to be monitored periodically & needs to change regularly .If catalysts are not changed on time & used beyond its life Ammonia will not crack effectively and partial cracking will create “Nitriding” effect for the coils which are extremely harmful and spoiling the wire rod characteristic itself. Even partially, nitride wire cannot be cold forged at all.


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