1200 ℃ Stainless Steel Pipe Annealing Heat Treatment Furnace Bogie Hearth Car Bottom Type

1200 ℃ Stainless Steel Pipe Annealing Heat treatment Furnace Bogie Hearth Car Bottom Type

1. Equipment Purpose

RT3-980-12 quneching car bottom furnace is mainly used for annealing and heat treatment of various stainless steel parts.

2. Technical Parameters

3. Overall features and structure of the equipment

RT3-980-12 bogie hearth furnace is mainly composed of furnace shell , furnace lining , furnace door and

furnace door lifting mechanism, furnace door pressing and sealing mechanism; load-bearing trolley and

trolley traction mechanism, furnace body and trolley sealing mechanism; heating elements and fixing devices;

furnace temperature automatic control system; And so on.

3.1 Furnace shell, 1 set

3.2 Furnace lining : The lining is a full fiber structure, constructed with high-quality zirconium-aluminum

refractory fibers, using standard stainless steel round steel parts and scientific and reasonable installation

methods. The fiber folding block is pre-compressed again before installation (compressed bulk density ≥ 230Kg/m3 ⁾ ,

fixed on the furnace top shell with stainless steel round steel , and the installation thickness of the insulation

material is 325 mm. The structure has low thermal conductivity, low thermal dissolution, excellent chemical

stability, thermal stability, thermal vibration resistance, excellent tensile strength and corrosion resistance.

The highest temperature resistance of aluminum silicate fiber is 1360 ℃, and the material of the fiber fixing part is 304 stainless steel .

3.3. Furnace door and furnace door mechanism, furnace door pressing and sealing mechanism;

3.4. Load-bearing trolley and trolley traction mechanism, furnace body and trolley sealing mechanism

3.4.1 Trolley and trolley traction mechanism

The trolley is composed of a frame, a steel plate on the trolley surface, wheels, refractory masonry,

a heat-resistant steel furnace bottom plate Ni7N , and a trolley traction mechanism.

3.4.1 Trolley steel structure: It is welded with 18 # steel beam and 10 mm steel plate.

Its rigidity ensures normal operation under full load and no deformation during long-term use.

3.4.2 Wheels: The wheels of the trolley are made of ZG55# steel castings after processing.

The transmission shaft is made of 45# steel with precision processing and tempering treatment.

The transmission bearing uses heavy-duty roller bearings to ensure the load requirements.

In order to reduce the wheel pressure of the trolley, 8 pairs of 16 Ø 240 wheels are installed

at the bottom of the trolley to support the entire trolley.

3.4.3 Lining: Heavy high-aluminum refractory bricks, lightweight refractory bricks, insulation bricks,

etc. are used to make a composite lining. Heavy high-aluminum refractory bricks are used for

masonry of parts prone to collision and load-bearing parts (high-temperature adhesive is added

to the mud during masonry) to enhance the structural strength of the furnace lining. Expansion

joints are left during production to prevent the lining from expanding after being heated and damaging the lining.

The furnace bottom plate is cast from Ni7N material with a total thickness of 30mm.

The maximum temperature is ≤ 1200℃ and it can be used for a long time without deformation or cracking.

3.4.4 Trolley traction mechanism: The trolley travel mechanism adopts self-propelled mode.

The trolley enters and exits the furnace through the reducer to drive the trolley driving wheel

to make the trolley move, and the operation is stable and reliable .

3.4.5 Sealing mechanism between furnace body and table

The sealing problem is a very important part of furnace design. The quality of the sealing

performance directly affects the uniformity of the temperature in the furnace and the service

life of the furnace; it also has a great impact on energy consumption and the heat treatment

quality of the workpiece. In the overall structure of the furnace, the sealing device is in a relatively

high temperature area and the working environment is relatively harsh. Therefore, it is very

necessary to adopt a sealing solution with reliable performance, simple structure, long service

life and easy maintenance.

The sealing between the furnace door, furnace body and trolley is more critical.

The sealing between the furnace door and the furnace body adopts the deadweight compression

structure commonly used in heat treatment furnaces in the mechanical industry, and the sealing

between the trolley and the furnace body is a special-shaped brick and fiber cotton block seal.

The above structure has been well and widely used in trolley-type heating furnaces and trolley-type

heat treatment furnaces, and has a good sealing effect.

3.5 Furnace Heating Elements

The heating element is made of high-quality high-resistance alloy material 0Cr27AL7Mo2 ,

which is processed into a corrugated shape and installed on both sides of the furnace body.

All lead rods are made of φ16 0Cr25AL5 material, and the wiring clamps of the lead rods are

special industrial clamps to ensure that the wiring is firm and reliable. The neutral points of all

resistors are connected to zero, and the cross-sectional area of the neutral wire meets the

requirements of industry standards.

3.6 Electronic control system

Temperature control: The temperature control adopts multi-segment zoning control and adopts

Japan Shimaden intelligent temperature controller. By setting its reasonable parameters,

it can achieve the best control of each temperature zone. By using its online self-tuning function,

it can calculate the best PID parameters of the furnace and achieve a more ideal temperature stability.

3. 7 Scope of supply of complete equipment

4. Major component manufacturers