Batch Annealing Furnace/Annealing Line/Annealing for Cold Rolling Mill

technology program

2.Equipment technical parameters and requirements

2.1 The main process parameters

2.1.2 Annealing material: Plain carbon steel

2.1.3 Product Specifications: Steel coil diameter ≤ 2100mm;

2.1.4 Bakeout temperature: 80~100°C;

2.1.5 Annual production capacity of each group: about 15000T
(calculated at 6,500 hours per year)

2.2 The main design parameters

Moran Tech 10 units electric heating batch annealing furnaces
2.2.1 Cover table ratio: 1:2;

2.2.2 Heating hood maximum working temperature: 850°C

2.2.3 Inner cover working temperature: <750°C

2.2.4 Furnace gas temperature uniformity: ≤±5°C;

2.2.5 Instrument Temperature Control Accuracy: ±3°C

2.2.6 Heating Power: 900~1000 Kw

2.2.7 Working voltage: 380V;

2.2.8 effective loading diameter: Φ2100mm

2.2.9 inner cover inner diameter: Φ2300mm

2.2.10 effective loading height: 5650mm

2.2.11 stacking mode: single stacking

2.2.17 Maximum Working Pressure: <5KPa

2.2.18 Cooling Method: Air Cooling, Water Cooling

2.2.19 Protective Gas: Ammonia Decomposition Gas

3. Equipment parts

3.1 Electric heating cover

3.1.1 Steel Structure: Using Q235-A, the steel plate is welded to the
steel section, and the bottom inner ring is made of stainless steel
ring to ensure that the steel structure is not deformed.

3.1.2 Furnace lining: It adopts light refractory brick and aluminum
silicate blanket compound heat preservation furnace lining, which
has good heat preservation effect, low surface temperature rise of
furnace shell, and temperature rise ≤ 45°C.

Moran Tech 10 units electric heating batch annealing furnaces
3.1.3 Heating element: The heating element is made of high
temperature resistance alloy Cr20Ni80 which has a long service life
under high temperature. The power connector adopts a plug-in type
copper plug. When the heating cover is used, the copper contact is
automatically butted. When the heating cover is lifted off, the plug
cover automatically closes. , ensure safety, heating power 900 ~
1000Kw.

3.2 cooling cover:
The entire steel structure is simplified and made of carbon steel plate,
reinforced with stiffeners, and adopts jet air cooling and jet water
cooling. There are two cooling fans at the bottom of the cooling
cover and a jet plate at the top. When the cooling fan starts, cold air
enters from the lower part and is discharged at the upper part.

3.3 Corrugated inner cover:

Moran Tech 10 units electric heating batch annealing furnaces
Simplified to use 10mm thick 321 heat-resistant stainless steel,
Simplified with a roller press machine into a corrugated shape, which
increases the simplified strength and increase the heat transfer area,
wave pitch 150mm, wave depth, head spin forming, longitudinal
seam Both sides of the ring seam are precision welded. The flange
is a carbon steel plate 40mm thick, and the flange and bottom ring
can be tightly sealed after welding.

3.4 Furnace table:
The hearth is the core part of the hearth furnace. In the production,
we adopt a fully sealed steel structure, which mainly consists of a
circulating fan, a fan blade, a furnace block body, a fluid-conducting
fluid, and a receiving plate. The structure of the hearth is more
reasonable. With more standardized materials, safer use, superior
performance, and longer life.

Moran Tech 10 units electric heating batch annealing furnaces

The circulating fan adopts 55/11Kw-4/8 grade, and the motor shaft
and fan blades are made of heat-resistant stainless steel. Material:
OCr25Ni20Si2 Japan NSK bearing, motor shaft and fan blades need
dynamic balance to ensure interchangeability.
Guarantee long-term trouble-free operation.
The base of the hearth is welded by I-beams and steel plates. The
flange on the top of the chassis is made of 40-thick mid-plates. The
flanges are covered with dovetail-shaped silicone rods. The
water-cooled grooves are welded on the flanges. There is a
circulation fan under the chassis. The mounting base, after welding
the entire chassis, strictly guarantees the vertical and horizontal lines
of the two planes. The deflector plate is not welded to the furnace
bottom body so as to facilitate the repair of the deflector plate. Two
thermocouples are set on the furnace seat to control the material
temperature in the inner cover area. The inner cover has two points
to measure the temperature, one record and one temperature

Moran Tech 10 units electric heating batch annealing furnaces
control record. , thermocouple with armored type, can be easily fixed
on the strip ring.

3.5 Valve holder:
It is composed of flow meter, vacuum pressure gauge, pressure
control instrument and so on to realize the operation and control of
the evacuation of the pedestal, the protection of the gas, and the
exhaust gas deflation.

3.6 Temperature Control and Electronic Control System:
Electronic control microcomputer PLC as the main control
component, through the 485 communication temperature control

Moran Tech 10 units electric heating batch annealing furnaces
module, high-speed operation of the furnace temperature real-time
monitoring, control accuracy of ± 3 °C; comprehensive accuracy of
0.8% (relative maximum). Through the local network connection, it
can provide the trend display of the furnace and the real-time
temperature printout in the furnace. The temperature heating unit
adopts a three-phase cycle power regulator, and the load current is
relatively balanced when multiple devices are running. It improves
the adjustment accuracy and power supply utilization, and avoids the
increase in the playing capacity of the hands and power equipment.
The node effect is very obvious. During normal operation, the
microcomputer not only monitors the real-time data, but also
monitors the status of each bit in real time. Once a fault occurs in the
bit status, the system generates an alarm and is displayed in the
"Diagnostics" menu to help you locate the fault and repair it in time.
Furnace temperature can be automatically controlled at any
temperature point and the entire annealing process.