Raising Hearth Furnace upto 1800°C

60R 4 / 70R 4

Raising Hearth Furnace upto 1800°C with MoSi2 Heating Element


  • High Quality MoSi2 1800 or 1900 grade Heating Elements Vertically suspended on on 4 cornerdirectly radiating on the heating cavity to derive symmetrical heat distribution.
  • Hot-face Super Refractory Mullite / Bubble Alumina insulation backed by low heat capacity refractory and Fibrous insulations of different grades
  • Dual Shell with Fan cooling to ensure low Skin temperature.
  • Bottom-open Cavity closed by Vertically moving Hearth Fiber wool sealing in the Door for least Heat leakage (Manual Mechanism).
  • No Convectional heat loss, so low drop of temperature in loading / unloading and cooler ambience.
  • Thyristorised Circuitry with adjustable Current limit and Soft-Start features for maximum protection to Heating Elements and for simple control of heat-up rate.
  • Air Cooled Step Down Transformer/s having minimum 3 Nos. Input Step Change facility for desired Secondary Voltage
  • Micro-processor based Digital PID Temperature Controller / Programmer with Pt/Rh Thermocouple (Type ‘B’ or ‘LJ’) in pure Alumina Sheath.
  • Digital Over-Temperature Protector with ensure overall safety.
  • Exhaust air outlet at Roof of the Furnace
  • Stirrer arrangement through roof (Optional)
  • Reduced risk of Furnace damage, Cheaper and easier maintenance.
  • PC Interface for On –line Date Acquisition / Storage Graph / Table also available (Optional)


  • Temperature Control Accuracy within ±1°C of set point.
  • Temperature uniformity within ± 5°C near T'max with soaking.
  • Carefully Engineered for rugged use and easy maintenance.
  • Easy Installation and Hassle Free Operation


  • Ideal for melting in Crucible and hot working operations
  • Thermal Spalling testing in Quality Control Laboratories
  • Glass Melting


  • Welded angle-iron frame Platform model construction in two sections with Hammer-Tone painted Sheet-metal Paneling.
  • The Furnace section with heating cavity has its opening at the bottom only closable by a refractory insert
  • Electrical Section houses the specially designed Transformer/s complex with Electrical gearing (Analog Voltmeter, Ammeter Switches etc.) thereby needing lesser floor area.
  • Heat-affectable metallic parts in the vicinity of Door opening are of heat-resisting Stainless-Steel fabrication.


T' Max
Cavity Size (mm)
Hours to
Sq. Base H
60R 2* 100 150 1.0 2.0
60R 4 150 200 2.5 5.0
60R 10 200 250 3.0 7.0
60R 20 250 325 4.0 8.0
70R 4 150 200 3.0 5.0
70R 10 200 250 3.5 7.0
70R 20 250 325 4.5 8.0
80R 10 200 250 4.0 7.0

[ ‘*’ denotes Table models ]