China Walking Hearth Heating Furnace

1, Equipment Purpose
This equipment is mainly for heating the steel billet prior to the forging. The max. working temperature is 950ºC and the normal working temperature is 900ºC.
2, Main Characteristics
2.1 It adopts end-in and end-out design, reduced the heat loss and make the full use of equipment's space.
2.2 Reliable and reasonable loading and unloading device with the perfect Alarm & Check function, which ensures a automatic running of equipment and reliable and stable work of the workpieces.
2.3 imported high quality combustion equipment and perfect double valve PLC control system gives an auto. temperature control and the air-gas proportion can be adjusted.
2.4 Walk Function, a kind of design to keep the same TAKT time of each zone, as to ensure the heating quality of workpiece.
2.5 Better and Perfect Recording Function.
2.6 Recording and Output Function, which can trace back to the whole heating process.
2.7. Visually reflect the working condition inside of the furnace from the computer analogue display.
2.8It is equipped with auto. pressure control system, which can regulate the smoke exhaust based on the pressure and minimize the energy loss. The pressure can be controlled within 10-20Pa..
2.9 It is equipped with Centralized lubrication system, which relieves the strength of working, and ensures the normal working of equipment effectively.

3 Process Description
Loading: Operator will select the heating process on the computer per the size of workpiece to be heated, and input the quantity number, then lift the workpiece onto the loading roller (it shall be made by the user) with the help of overhead crane.
Working: After the workpiece enters into the furnace, it will be positioned auto. by the positioning device, and moved forward after supported by the walking beam. Workpieces can be moved forward and rotated by the special settings.
Unloading: Unloading car will transfer the workpieces onto the unloading roller when the workpieces enter into the unloading area, and the workpieces will turn to the subsequent process then.


D. Process Parameter
1) Workpiece Specification

No.
Item Description
Specification1
Material of Workpiece
Copper and copper alloys 2
Size of Workpiece150x620-1000x3500-5000mm3
3500mmx620mmx150mm4
Weight of WorkpieceMaximum slab:8940Kg
Reference slab for design:2900Kg5
Equipment Capacity 10T/h(3500 mmx620 mmx150mm)6
Output Frequency 4pcs/h7
Walking Time15min/pcs8
Process Time165min9
Walking Distance 750/1500mm

2) Main Equipment Technical Parameter

No.
Item Description
Specification1(xx)
Effective Dim. of Equipment (L*W*H)8250x6000x1200mm2
Rated Temp.950ºC3
Normal Working Temp.900ºC4
Productivity 10T/h5
Heating Method
Natural Gas6
Low Calorific Value of Fuel8400Kcal/Nm37
Height of Working Table+1200mm8
Driving Method of Walking-beam
Hydraulic Transmission Device9
Rated Walking Cycle15min/
15min/Cycle10
Fastest Walking Cycle10-50min/
10-50min/Cycle11
Lifting distance of Walking Beam180mm(100mm 80mm)
(Lift up 100mm, fall down 80mm)12
Max. movement distance of Walking Beam750/1500mm13
Effective Load Stations 1114
Max. Load Capacity50T15
Max. Gas Consumption250Nm3/h16
Temperature Control Zone4
Zones17
Pressure of Fuel3100Pa18
Pressure of Combustion Air3600Pa19
Combustion Air Consumption2900Nm3/h20
Power of Air Blower11Kw21
Type of Blower9-19-8D22
Air Preheat Temperature250-350ºC23
Walking method
Hydraulic 24
System Working Pressure16.0Mpa25
Working MediaN46
Anti-wearing hydraulic oil26
Cleanliness of GreaseNAS7 Grade27
Deviation of Walking DeviceWithin 30mm28
Power of Drainage Pump3Kw29
Consumption of Cooling Water30Nm3/h30
Opening Method of Furnace Door
Power-driven 31
Power of Motor of Roller Conveyor3Kwx2=6Kw