Wondery RT3-60-6 Electrical Bogie Hearth Furnace Of Precious Stones (65KW; 650℃)

Rated power: 65KW+5% (1-100%) adjustable

Power supply: 380V, 3P, 50Hz

Rated temperature: 650℃ (normal working temperature:500℃)

Empty furnace temperature rise speed: ≤1h heat up to 500℃

Control zone: 1 zone

Effective working size: 1500×800×800mm (L×W×H)

Heating element connection: Y

Temperature uniformity: ±5℃

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: ＜35℃

Heating element: 0Cr25AL5 (strip)

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

Loading method: Stones are loaded on the trays, and the trays are loaded on the loading frame, then load the frame on the bogie and drive the bogie into the furnace hearth.

Furnace lining: Standard Refractory fiber

Furnace door opening method: 1ton electric hoist up-down, sealed by spring

Bogie moving method: By 1.5KW cycloidal pin gear speed reducer

- Loading frame:

Material: 5# 304 stainless steel angle iron;

Layer: 8 layers;

Size: 1300*700*750mm

- Loading tray:

Material: 304 stainless steel plate;

Thickness: 3mm;

Hole diameter:φ15mm, The holes are evenly distributed on the tray;

Q’ty: 8 pieces;

Size: 1280*680*50mm;

1. Application

The RT3-60-6 electrical bogie hearth furnace is mainly used for heat treatment of precious stones.

2. Structural Introduction

The RT3-60-6 bogie hearth furnace is mainly comprised of furnace

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

element and fixed device, furnace temperature auto control system.

2.1 furnace body

The bogie hearth furnace body steel structure is made from 10-12#

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 bogie hearth furnace for sale 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 240mm. The silicate aluminum fiber resists a maximum temperature of 950℃.

2.3 furnace door and door up-down system

The car bottom furnace supplier door is comprised of all-fiber lining and steel

structure casing. The door frame is made of 10mm steel plate. 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.

bricklaying body: The bogie is built with a 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.

The bottom plate of furnace is made of CrMnN material with the total thickness of

30mm. The bottom plate resists a maximum temperature of 950℃.

Sealing: The seal between furnace door and furnace body and bogie is more

important. The seal between furnace door and furnace body adopts spring compression

structure. The seal between bogie and furnace body is seal of special-shaped brick

and fiber cotton block.

2.5 heating element

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

mounted in 2 side furnace 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 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 wholesale car bottm furnace 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 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.