Gas Fired Car Bottom Furnace Heat Treatment 6000×2500×1500mm 4 Zones 1000℃

6500×2300×2000mm Gas fired Bogie Hearth Annealing Furnace

1. Application

The gas fired car bottom furnace is mainly used for heat treatment of metal parts.

2.Structural Introduction

2.1 furnace body

The car bottom furnace body steel structure is made from 12-18#

U steel and steel plates. The side pillar and back pillars are

made from sectional steel, and are reinforced with sectional steel bracings.

The external wall of the furnace is painted with 2 layers of primers, and 2

layers of coating paint. The key part of the furnace is painted with heat

resistant paint. 

2.2 lining

The bogie hearth furnace supplier lining adopts 1360 high aluminum refractory

fiber folding block with long-term service temperature of 1100℃. The total thickness

of furnace lining is 320mm. This refractory lining structure has the advantages of

low heat conductivity, strong anti-shock capacity, and anti-erosion. Aluminum

silicate fiber compression block with thickness of 300mm is designed as the

high temperature refractory layer.

2.3 bogie

The wholesale bogie hearth furnace is comprised of heat preservation

material, bogie frame and moving mechanism. The refractory layer is divided

into 3 sub-layers, i.e., 1st top high-alumina brick layer, and 2nd and 3rd layer

with both light clay bricks.

The bogie framework is made of 20# U-steel and 20# I-steel. The edges of the

bogie are made of 20mm I-steel. The bogie is equipped with 8pieces of wheels.

Each wheel diameter is 350mm.

The heat preservation material is divided into 3 layers, the top layer being

high-alumina bricks, and 2nd and 3rd layer being both light clay bricks.

The wholesale car bottm furnace is driven by motor reducer gear driving mechanism.

The moving speed of the bogie is 6-8m/min.

The seal between bogie and furnace body employs refractory fiber blocks, which is

tightly pressed by electric cylinder and linked with electric cylinder of furnace door.

When the bogie is in place, the electric cylinder drives the lever to lift up the refractory

fiber cotton sealing block and push it to the gap between the bogie and the furnace

body. At the same time, the furnace door falls down and the electric cylinder acts to

tighten the furnace door. If the bogie is discharged, the electric cylinder will release

the furnace door and put down the sealing block. The furnace door will rise in place,

then the bogie can be opened. The above actions can be manual or automatic

continuous action.

2.4 Sealing System

The seal between the door and the body of the furnace and the trolley is more

critical. The sealing between the furnace door and the furnace body uses the

electric push rod. This makes the whole door tightly sealed up, so as to ensure

that the heat inside the furnace does not leak from the door

2.5 furnace door

The heat treatment furnace trolley door is comprised of all-fiber lining and

steel structure shell. The door is built with silicate aluminum compressed fiber

blocks same as that for the furnace body. The shell is a welding structure from

sectional steel and steel plates. The furnace door has the feature of simple,

practical, reliable and convenient maintenance. The furnace door is fixed on the bogie.

Soft hard contact sealing structure is set between the furnace door and the

furnace lining. When the furnace door is closed, the electric push rod mechanism

is used to compress the furnace door to make the sealing fiber block contact with

the furnace mouth. When the furnace door is opened, pull the electric push rod

pressing mechanism to separate the furnace door from the furnace mouth frame

steel plate with a clearance of 100 mm, so as to ensure that the furnace door

does not scratch or touch with the furnace lining and trolley during the lifting process.

And ensure smooth movement when opening and closing.

3.Main Technical Parameters