Electric Holding Gas Fired Heat Treatment Furnace Hydrogen Atmosphere Melting Annealing

3. Technical Specifications and Basic Configuration

• 3.1 Rated Temperature: 1600°C
• 3.2 Maximum Temperature: 1650°C
• 3.3 Effective Size: Φ750×500
• 3.4 Heating Element: Molybdenum heater
• 3.5 Process Atmosphere: Nitrogen/Hydrogen; one nitrogen line, one hydrogen line, with the option to humidify the mixed gas after nitrogen-hydrogen mixing.
• 3.6 Hydrogen Supply Conditions: Hydrogen cannot be supplied if the oxygen content exceeds 20ppm; if the oxygen content exceeds 20ppm during hydrogen supply, the hydrogen supply is automatically cut off.
• 3.7 Humidification Water Temperature: ≤80°C
• 3.8 Dew Point Range: -20 to 60°C
• 3.9 Temperature Control Stability: ±1°C, with PID auto-tuning function.
• 3.10 Temperature Uniformity: Better than ±5°C (tested at 1600°C for 2 hours in an empty furnace).
• 3.11 Temperature Control Thermocouple: Type B
• 3.12 Temperature Control Points: Three independent heating zones from top to bottom, with three independent temperature control points.
• 3.13 Temperature Control Segments: 19×19 segments
• 3.14 Cooling Method: External water cooling, with three water cooling zones: upper, middle, and lower.
• 3.15 Pressure Monitoring: Pressure transmitter for real-time monitoring of furnace pressure.
• 3.16 Pressure Range: 5000~15000Pa
• 3.17 Vacuum Detection: Vacuum gauge for detecting furnace vacuum level, with digital vacuum gauge displaying the vacuum value.
• 3.18 Explosion Protection: Automatic opening of the exhaust valve when furnace pressure exceeds the set value.
• 3.19 Exhaust Chimney: One exhaust port with an ignition device.
• 3.20 Alarm Protection: Alarms for over-temperature, thermocouple break, leakage, heater break, motor overload, low water level in the humidifier, low pressure, low cooling water pressure, and UPS activation, with over-temperature alarm and power-off protection.
• 3.21 Maximum Heating Power: 120kW
• 3.22 Idle Furnace Insulation Power: ≤60kW
• 3.23 Heating Rate: RT~1200ºC ≤5ºC/min, 1200~1600ºC ≤3ºC/min
• 3.24 Surface Temperature Rise: <35ºC
• 3.25 Equipment Weight: Approximately 3500Kg
• 3.26 External Reference Dimensions: 2240×2900×3000mm (W×H×D, excluding control cabinet), subject to final product specifications.
• 3.27 Exterior Color: Light gray

5.Normal Operating Conditions

• 5.2.1 Environmental Conditions: Temperature 0~40ºC, humidity ≤80% RH, no corrosive gases, no strong air turbulence.
• 5.2.2 Nitrogen Conditions: Nitrogen, purity 99.999%, source pressure 0.2~0.4Mpa, consumption 4~12m³/h.
• 5.2.3 Hydrogen Conditions: Source pressure 0.2~0.4Mpa, consumption 4~12m³/h.
• 5.2.4 Power Gas Source Conditions: Clean, dry, oil-free compressed air, pressure 0.4~0.8Mpa.
• 5.2.5 Water Supply Conditions: 0.1~0.3Mpa, clean, non-corrosive, supply flow rate approximately 50L/min.
• 5.2.6 Ventilation System: Non-contact connection to the user's exhaust system, exhaust capacity greater than 15m³/h.
• 5.2.7 Floor Requirements: Level, no significant vibration, load-bearing capacity >500Kg/m².
• 5.2.8 Power Conditions: Capacity greater than 160kVA, 3-phase 5-wire, voltage 220/380V, frequency 50Hz. Live wires: yellow, green, red; neutral wire: blue; ground wire: yellow-green.
• 5.2.9 Installation Site: 4500mm×3500mm×4000mm (W×H×D), installation area greater than 18m².