Push Steel Heating Furnace

Reheating Furnace for Rolling Mills
The Push Steel Heating Furnace, also known as a Pusher Furnace, Pusher Slab Furnace, or Pusher Type Reheating Furnace, is a continuous reheating system widely used in the steel and forging industries. It transports billets, slabs, or cast pieces along a skid or roller hearth using a hydraulic or motorized pusher. Materials are gradually moved through the preheating, heating, and soaking zones, where they are uniformly heated to rolling or forging temperatures—typically up to 1,650–1,800 °C. The modular furnace body supports various heating technologies including electric resistance (e.g., SiC, MoSi₂) and gas burners, and may be customized with vacuum chambers, protective atmospheres, or radiant tubes for energy-efficient and high-precision temperature control.
  • Free combination on demand to meet various working conditions

Features & Specifications.

  • Continuous Pusher System

    Equipped with a hydraulic or servo-electric pushing mechanism, supporting single push loads up to 15 tons, ensuring stable and high-load material transfer.

  • Zonal Temperature Control

    Available in two-zone (preheating + heating) or three-zone (preheating + heating + soaking) layouts, with precise control accuracy of ±5 °C.

  • High-Temperature Capability:

  • Electric heating

    up to 1,700 °C using MoSi₂ elements.

  • Gas heating

    up to 1,800 °C via direct flame or radiant tube burners.

  • Energy-Efficient Design

    Incorporates lightweight ceramic fiber linings for rapid thermal cycling and low heat loss.

  • Modular Construction

    Customizable length of heating, soaking, and cooling zones. Each section can be isolated with baffles and independent gas supply to maintain temperature and atmosphere uniformity.

  • Atmosphere & Vacuum Compatibility

    Optional gas-tight furnace casing and airlock chambers for entry/exit to maintain controlled O₂ levels, suitable for reduction or high-purity processes.

  • Advanced Cooling Options

    Direct, indirect, or chemical cooling systems with CFD-optimized design to minimize cycle time and recover waste heat.

  • Flexible Hearth Dimensions

    Standard hearth widths include 6”, 8”, 12”, with custom sizes available. Heating zone length up to 25 meters.

Typical Applications.

  • Reheating of billets, slabs, and bars before hot rolling.

  • Heat treatment (quenching, normalizing, annealing) of forgings, rolls, gears, and shafts.

  • High-temperature sintering of ceramic fuel pellets, multilayer ceramics, and SOFCs (Solid Oxide Fuel Cells).

  • Continuous annealing and brazing of stainless steel and special alloy strips.

Installation & Operation Requirements.

  • Installation & Operation Requirements

    Requires refractory concrete foundation with level tolerance of ±2 mm/m. Skid rails or rollers must be made of wear- and heat-resistant alloys.

  • Energy Supply:

    ·Electric: Requires high-capacity transformers and SCR-regulated power cabinets.

    ·Gas: Operates on low-pressure natural gas or LPG (20–50 kPa) with zero-pressure and proportional valves.

  • Cooling Water

    Inlet temperature ≤ 32 °C, pressure 0.2–0.4 MPa, flow rate depends on furnace size.

  • Control System

    PLC + HMI-based system supporting OPC-UA/Modbus integration with MES. Includes key interlocks per NFPA 86 or EN 746-2 for gas pressure, flame detection, overtemperature, and pushing overload.

  • Maintenance

    Periodic inspection of pusher hydraulic oil, refractory lining condition, and heating elements/radiant tubes. Annual calibration for temperature control and hot leak test recommended.

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