Heat Treatment Furnace Tempering Heat Treatment Process

Continuous mesh belt conveyor tempering furnace

Features:

(1) Heater adopts up-down design to get uniformity temperature and has a long service life and low faulty rate.

(2) Equipped with string fans at the top of the furnace make uniformity temperature and high quality hardness.

The tempering furnace is composted of cover, feeding shelf, wire mesh belt driving device, material of hot insulation, heating apparatus, circulating fan apparatus, discharging rack, and Temperature control apparatus. There are 3 high speed mixing fans on top of furnace, which can make the convection current to ensure the temperature uniformity inside the furnace, small hardness balance of work pieces and color uniformity after tempering. drive system:consists of the transmission reducer, frequency conversion governor, mesh belt, transmission detection, etc. specifications and general composition as bellows:

1)mesh-belt:SUS304

2)max temperature:650℃

3)rated power:160kw

4)The length of the heating furnace:12000 mm

5)Width of the mesh-belt:1000mm

6)effective height:150mm

7)The transmission speed:Through the heating zone 30—180min, Frequency conversion stepless adjustable

8)furnace temperature:with ±5℃

9) Heat preservation material: The both sides and the top of the furnace adopts Ceramic fiber and Ceramic fiber board, The bottom and inner two sides of furnace adopts impervious carbon brick ,it’s light and excellent heat preservation. Heat-resistant binder adopts China puddle, strong bonding ability, and it is more fixed at the surface when the heat is higher. High-alumina and high density bricks are used at the exit of dropping work pieces to gain in strength. In the process of the furnace brick working, expansion gaps are left every one meter to prevent the cracks due to heated expansion and cooled contraction in case of the influence of heat-insulating property

10). Heating devices: electrothermal radiant tube

material: SUS304 Core: squirrel-cage type structure, heating unit adopts high-temperature electro thermal alloy wire

Mixing fan (with bearing cooling system) 5sets

blade, spindle material: SUS304

Automatic temperature control cabinet

There is PID in full set of production plan which used to control running, overheating, liquid level, transmission, acousto-optic alarm, thermo element breaker, safety lock.

Control system adopts well-known, good quality electrical components. The key components are imported Siemens. The voltage regulator is adopted to heat up, by this ,it can control temperature preciously . Transformer is low voltage and large current, it can lengthen the life of silk of electric heater. Every group of heater in control cabinet equipped with power controller ,it can achieve the functions like Soft Start,soft turn-off, Constant Current ,Current Limiting ,lost protection , over current protection,overheat protection ,etc. control loops equipped with interlocking device to detect system faults ,alarm when overloaded, etc.

(1) control cabinet shell (double door closed dust) 1 set

(2) temperature controller (made inJapan) 11 sets

(3) adjustable power controller 11sets

(4)circuit breaker (made in China) 1 sets

(5) contactor (made in China) 1 sets

(6) thermal relay (made in China) 1 sets

(7) intermediate relay (Schneider, made in France) 1 sets

(8) current meter (made in China) 1 sets

(9)transformers (made in China) 1 sets

(10) close to switches 1 set

(11) copper clip 1 set

(12) wire slot 1 set

(13) transformer (made in China) 8sets

(14) other components (made in China) 1 sets