Wondery RT2-100-9 Electrical Bogie Hearth Furnace (100kW; 950℃)

Rated power: 100Kw+5% (1-100%) adjustable

Power supply: 380V, 3P, 50Hz

Rated temperature: 950℃

Control zone: 1 zone

Effective working size: 2000×1000×750mm (L×W×H)

Furnace overall size: 2780×1960×2180mm (L×W×H)

Floor area: About 6600×3200mm (L×W)

Heating element connection: Y

Temperature uniformity: ≤±10℃

Temperature measurement accuracy: ±1℃

Non-load furnace power consumption: ≤18%

Temperature control method: SCR, PID regulator; Huibang temperature controller with over temperature alarm;

Furnace surface temperature rise: ＜45℃

Heating element: 0Cr25AL5 (strip)

Bogie face plate: CrMnN, 30mm thickness, heat resistant steel

Loading method: Product loaded on the bogie, and then bogie moves into the furnace

Furnace door opening method: Electric hoist up-down, sealed by spring

Bogie moving method: By the reducer

Bogie driving power: 2.2KW

Furnace lining: Standard Refractory fiber

1. Application

The RT2-100-9 electric bogie hearth furnace is mainly used for heat treatment of steel structure parts, cast steel parts, shaft bar parts, tool steel products, etc.

2.Structural Introduction

The RT2-100-9 bogie hearth furnace is mainly comprised of furnace

body, lining, furnace door and door compression system, bogie, heating

element, and temperature control system.

2.1 furnace body

The car bottom furnac body steel structure is made from 8-12# sectional

steel and ≥3mm 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 wholesale car bottm furnace price body is built with an all-fiber system.

The lining material used is quality aluminum fibers fixed by round steel parts.

The aluminum fibers are pre-compressed into blocks (compression gravity:

≥230Kg/m3 ) and then fixed to the furnace body by round stainless steel parts.

This refractory lining structure has the advantages of low heat conductivity,

strong anti-shock capacity, and anti-erosion. The lining has a total thickness

of 300mm. The silicate aluminum fiber resists a maximum temperature of 1100℃.

The material of round steel fixation parts is 1Cr13.

2.3 furnace door and door up-down system

The bogie hearth furnace door is comprised of all-fiber lining and steel structure

casing. The door frame is made of 10mm steel plate and 12mm sectional steel.

The door is built with silicate aluminum fiber blocks same as that for the furnace

body. The overall structure of the furnace maintains its shape while heated.

Driving method of door: The furnace door is electrically lifted upward and

downward by the hoist. And it is sealed by spring.

2.4 bogie

The bogie is comprised of bogie frame, wheels, refractory bricklaying body,

heat resistant bogie face plate, heating elements, and bogie driving mechanism.

bogie structure: the bogie frame is made from 10# beam and 10mm steel plates.

The bogie could work for a long time without deformation at full load.

wheel: The wheels are made from ZG55# steel casting. The transmission shaft

is made from 45# steel, and it is heat treated. The transmission bearing is of the

heavy type pillar bearing to bear the weight. There are a total of 2 pairs of wheels,

and each wheel is of diameter 240mm. The bogie is motorized. And the driving

motor is equipped with a braking speed reduction device to relieve the inertia at

the start-up and stop movement. There are 2 limit switches to avoid over-travel

of the bogie.

bricklaying body: The bogie is built with a heavy combination of high alumina

refractory bricks, light refractory bricks, and heat preservation bricks. The bricklaying

body of the bogie has heating elements installation slot for easy installation of the heating

elements. The impacted parts and weight bearing area are bricked especially with heavy

type high aluminum refractory bricks. There is also free space left for the refractory

lining expansion when heated.

bogie face plate: 30mm thick CrMnN heat resistant steel casting part with max

working temperature≤1200℃. It can prevent scales from falling into the heating

elements slot which would form a short circuit.

bogie moving mechanism: The bogie has a self-moving method. The reducing

gear drives the bogie wheel to move. The bogie movement is smooth and stable.

Sealing among furnace door, furnace body and bogie: Sealing between the

furnace door and the furnace body is through spring. The sealing between the

bogie and the furnace body is through soft special shape bricks and fiber cotton block.

2.5 heating element

heating element: The 0Cr25AL5 resistance spiral-shape alloy resistance strips are

mounted in 2 side walls. The resistance strips are produced through special molds,

and are installed in the furnace wall by porcelain nails. And there is a porcelain

gasket between the fiber wall and the resistance strips to avoid short-circuit.

There are 1 heating zone. All lead-out conductor bars are made of φ16 0Cr25AL5

material.

2.6 electrical control system

Temperature control: the furnace adopts Changzhou Huibang intelligent temperature

controller to control the temperature which has self-tuning function to calculate the

ideal PID parameter and achieve a temperature stability. The temperature controller

has the functions of over-temperature alarm and thermal couple breakage protection.

The car bottom furnace for tempering has 1 temperature control zone for controlling

the linkage between the temperature and the motor movements. Each zone is set

with an over-temperature alarm. The heating loop adopts the double-direction SCR

and trigger control. The power is regulated in the time proportional regulation manner.

The control actuation system is a large-power triggering one complete with a radiator

and an air cooling system. There is also an air switch. The heating loop is equipped

with ammeter, voltmeter, heating element on-off indicator, power-on interlock protection,

and safe earthing measures.

Movement control: The control system mainly controls the door up-down movement,

door compression, and door in-out movement. Also the movements are necessarily

linked to ensure the operation safety.