Walking Beam Furnace Mechanism

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Walking Beam Furnace Mechanism

  • Here are some common specifications for a typical walking beam furnace:
  • Temperature range: The furnace can typically reach temperatures of up to 1300°C (2372°F) for some heat treating processes.
  • Capacity: The walking beam furnace is capable of handling long workpieces such as bars, tubes, and structural shapes with a length of up to 60 feet or more.
  • Heating system: The furnace uses a gas-fired heating system with burners located along the length of the chamber.
  • Control system: The walking beam furnace is equipped with advanced control systems that optimize fuel consumption and reduce emissions.
  • Walking beam mechanism: The walking beam mechanism consists of a series of reciprocating beams that support the workpiece and move it along the length of the furnace. The upper set of beams is fixed to a hydraulic cylinder or motor, and the lower set of beams is connected to the workpiece.
  • Material handling: The furnace may be equipped with automatic material handling systems, such as conveyors or cranes, to load and unload the workpieces.
  • Energy efficiency: The walking beam furnace is designed to be energy efficient, with high thermal efficiency and low emissions.
  • Safety features: The walking beam furnace is equipped with safety features, such as temperature sensors, interlocks, and alarms, to ensure safe operation and prevent accidents.

Description


A walking beam furnace is a type of industrial furnace used for heat treating processes such as annealing, normalizing, and hardening of steel. It is designed to move the workpiece through the furnace using a walking beam mechanism, which consists of a series of reciprocating beams that support the workpiece and move it along the length of the furnace.

The walking beam furnace is ideal for heat treating long workpieces such as bars, tubes, and structural shapes, as the walking beam mechanism allows the workpiece to move continuously through the furnace without the need for manual handling. This results in a more uniform heat treatment process and can increase production efficiency.

Walking beam furnace: working principle

The working principle of the walking beam furnace is as follows:

  1. Loading: The workpiece is loaded onto the lower set of beams at the entrance of the furnace.
  2. Heating: The furnace is heated to the desired temperature using burners located along the length of the chamber.
  3. Walking beam mechanism: The walking beam mechanism consists of a series of reciprocating beams that move the workpiece through the furnace. The upper set of beams is fixed to a hydraulic cylinder or motor, which causes the beams to move up and down in a reciprocating motion. The lower set of beams is connected to the workpiece and moves with it as it is transported through the furnace.
  4. Transport: As the upper set of beams moves down, they push against the lower set of beams and cause the workpiece to move forward through the furnace. Once the upper set of beams reaches the end of its stroke, it moves back up, and the lower set of beams continues to move the workpiece forward.
  5. Unloading: The workpiece is unloaded from the walking beam furnace at the exit end.

The characteristics: Walking Beam Furnace Mechanism

The walking beam furnace has several key characteristics that make it well-suited for heat treating long workpieces:

  1. Continuous processing: The walking beam mechanism allows the workpiece to move continuously through the furnace without the need for manual handling, resulting in a more efficient and uniform heat treatment process.
  2. High temperature capability: The furnace can reach high temperatures of up to 1300°C (2372°F) for some heat treating processes, making it suitable for a wide range of applications.
  3. Large capacity: The walking beam furnace is capable of handling long workpieces such as bars, tubes, and structural shapes, making it ideal for industrial applications.
  4. Uniform heating: The burners located along the length of the furnace provide uniform heating, ensuring that the workpiece is heated evenly throughout the process.
  5. Energy efficiency: The walking beam furnace is designed to be energy efficient, with advanced control systems that optimize fuel consumption and reduce emissions.

Technical Parameters

Name Technical parameters
Description Walking beam type copper/brass slab heater
Material Copper, brass,cupro-nickel alloy etc
Slab size Thickness 160mm160mm

Width 400~420mm400~420mm

Length 3000~4600mm3000~4600mm

Standard Max. weight: 2.75t/piece/(160×420×4600mm)

2.75t/(160×420×4600mm)

Heating capacity Minium 12t/h, 4slab/h(1slab:160×420×4600mm)

:12t/h  4/h(160×420×4600mm)

Heating temperature 730~750ºC±5ºC(max 850ºC)
Hearth temperature() 800~900ºC
Fuel Natural gas LNG
Heat value 8900Kcal/ Nm3
Air preheating temperature 250~450ºC
Heat efficiency of the furnace ≥45%
Thermal control pattern Auto/ manual, impulse, remote control,
Burner type Imported flat flame burners of Germany KROM schroder.

heating zone each burner:23 Nm3/h;soaking zone each burner:15 Nm3/h

KROM schroder.23 Nm3/h;15Nm3/h

Number of burners Total: 18 PCS, heating zone:8PCS,

Soaking zone: 10 PCS

18,8,10

Rated burning capacity Max:334 Nm3/h

:334 Nm3/h

Dimension of the hearth W5000×H1200×L8000mm

5000×1200×8000mm

Loading capacity 16slabs/batch×2.75t/piece=44t/batch

16/×2.75t/=44t/

Total length of furnace ~11m

~11

Loading and unloading method End feeding and side discharge
Loading pattern Single row,3 zones, preheating zone2.5m, heating

zone 3.5m, soaking zone 2m

,, 2.5m,3.5m,2.0m

Vertical movement of walking beams: Lifting: 90mm, 90mm

Lowering: 80mm 80mm

Horizontal travel of walking beams: 500mm
Heat interchanger Hot tubular exchanger
Heated up time ~4 hours

~4

Quantity of heated up zone 3 zones 4sections

34

Material and space Slab: W420mm; slab in furnace:16pcs;

Gap between slab and slab: 80mm;

Stroke: 500mm

420mm;16;80mm;500mm

* Walking Beam Type Slab Heater Technical Data

Parts Name Parameters Guarantee value
&precision value
Remarks
Production
quality
Slab tapping temperature contrast ±5ºC
Slab full-length curvature ≤5mm/m
Surface quality No scratches,
,
Loading
Device
Loading speed 7.5min/time
7.5min/
Storing materials ≥3 PCS
Length measuring bias ±5mm
Width measuring bias ±3mm
Charging positioning accuracy ±5mm
Travel route measuring ±5mm
Combustion system Hearth pressure control accuracy ±10Pa
±10Pa
Furnace temperature control accuracy ±5ºC
Furnace atmosphere
control accuracy
Micro-oxidizing O2≤2%
Micro- reducibility CO:0~1%
Burner Life ≥3 years
Walking beam
Device
Total running deviation(cold)
()
±20mm
Total running deviation(hot)
()
±30mm
One walking beam precision ±1.5mm
Furnace shell Furnace wall temperature Max 45ºC
Fiber refractory lining life ≥5 years
Bottom furnace refractory life ≥5 years
Unloading device Furnace door opening-close time 7.5min/time
Heat
exchanger
Air preheating temperature ≥300ºC
Heat exchanger life ≥3 years
Exchanger flue gas exit temperature ≤450ºC
Cooling water Water seal yielding water temperature Max 60ºC
Others Furnace output ≥ 12t/h
Sound from 1m from operating point
1
≤85db
Furnace thermal efficiency ≥45%

* Energy and Media Consumption:

Item Consumption value Remarks
Natural gas 350Nm3/h Heat value: 8900Kcal/Nm3

8900Kcal/Nm3

Cycle water 12m3/h
Soft water 4 m3/h
Electric 5KWh/t
Nitrogen 12 Nm3/time
12 Nm3/
Compressed air 0.2 Nm3/time
0.2 Nm3/