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Silicon steel high temperature annealing furnace

Min.Order Quantity: 1 Set/Sets Silicon steel high temperature annealing furnace

Supply Ability: 2 Set/Sets per Month Silicon steel high temperature annealing furnace

Payment Terms: L/C,T/T,


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 The purpose of high temperature annealing is as follows:

 
(1) secondary recrystallization.
 
When annealing at high temperature, the oriented nucleus in the primary recrystallization structure grows abnormally, which makes the steel strip become a single oriented secondary recrystallization structure. Secondary recrystallization is the most basic and important process for the production of oriented silicon steel.
 
(2) purify steel.
 
In order to recrystallize the silicon steel strip, inclusions such as sulfide and nitride are necessary. But these inclusions are harmful to magnetism if they remain in the finished product. Therefore, after the secondary recrystallization is completed, the steel must be removed and purified, which requires high temperature and long time heat treatment of the silicon steel strip.
 
(3) the bottom layer of magnesium silicate is generated.
 
In order to improve the insulation performance of the silicon steel strip, a compact film with good adhesion to the base metal needs to be formed on the surface of the steel strip. For this reason, high temperature was used to react the annealing isolator (MgO) with SiO2 film on the surface of the steel belt, forming a uniform glass thin film -- magnesium silicate bottom layer with 2MgO·SiO2 as the main component on the surface of the steel belt.
 
Because the oriented steel in high temperature annealing, to further a MgO crystal water decomposition and exclusion, but also purification steel annealing insulation time is long, so the oriented silicon steel belt high temperature annealing, do not use steel belt continuous annealing furnace, usually in the periodic operation of the cover type annealing furnace. However, there are a series of shortcomings in the production, quality and management of the hooded furnace. In recent years, a number of projects have adopted continuous operation of steel coil annealing furnace as a high temperature annealing furnace, which has the advantages of energy saving, continuous production, stable product quality, less occupation, less personnel, low production cost, etc. The main furnace types are ring furnace and tunnel furnace. However, the continuous annealing furnace with steel coil has its limitation and certain application range.

 

Chamber size

200x200x200mm (Width * Height * Depth) (8 Liter)

Max. temperature

1200 C (<2hour)

1400 C (<2hour)

1700 C (<2hour)

Working temperature

1100 C

1300 C

1600 C

Temperature controlling

PID automatic control via SCR (Silicon Controlled Rectifier) power control with phase angle fired, current limiting resistor.

51 programmable segments for precise control of heating rate, cooling rate and dwell time.

Built in PID Auto-Tune function with overheating & broken thermocouple broken protection.

Over temperature protection and alarm allows for operation without attendant.

Max vacuum

0.007Pa

Temperature accuracy

±1C

Temperature Uniformity

±5C over 120mm

±3C over 80mm

Heating rate

0-20C /min

Thermocouple

K type

 S type

 B type

Heating element

Heating wire

SiC heating element

MoSi2 Heating element

Furnace Chamber

2 layers of ceramic fiber insulation

3 layers of ceramic fiber insulation

3 layers of ceramic fiber insulation

1st: 1430°C ceramic fiber board

1st: 1700°C ceramic fiber board

1st : 1800°C ceramic fiber board

2nd: 1260°C ceramic fiber board

2nd:1430°C ceramic fiber board

2nd: 1600°C ceramic fiber board

 

3rd: 1260°C ceramic fiber board

3rd: 1260°C ceramic fiber board

Furnace structure

Double layer steel casing with dual cooling fan, surface temperature below 60C

Furnace door

Front-side open

Power cutting off when furnace door open

Working voltage

110V or 220V or 380V, 50HZ or 60HZ

Rated power

7KW

Stander chamber size (mm)

100x100x100      120x120x130      150x150x150      150x150x200

200x200x200      200x200x300     250x250x300      300x300x300

300x300x400      350x350x500     400x400x400      450x450x450

500x500x500      600x600x600     800x800x800      900x900x900 

 

Note: the chamber size can be customized



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