10 pcs U Shape Sic Jinyu Electric Heating Elements High Temp Furnaces and Kilns

Description

Attention please:
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:
U Shape Sic Jinyu Electric Heating Elements High temperature Furnace and Kilns
GDU
type;
Quantity: (pcs, MOQ is 10 pcs)
HL: (mm);
CL : (mm);
D: (mm);
M: (mm);
N: (mm);
The U shape heating element is a kind of non-metal high temperature electric heating element It is made
of selected super quality green silicon carbide as main material,which is made into blank,silicified
under high temperature and recrystallizationCompared with metal electric heating element,this kind
of U shape heating element is characterized by applied in high temperature,oxidation resistance,corrosion,
long life and small deformation
Therefore, it is widely used in various high temperature electric furnaces and other electric heating devices, such as in the
industries of magnet,ceramics,powder metallurgy, glass, metallurgy and machinery, etc.
We adopt new production process of cold ends,so our U shape heating element have excellent specific rate of heat zone
resistance and cold end resistance,saving energy,long life,avoiding over-temperature of cold ends to damage the furnace
body.the commercial name of our U shape heating element is Honesty heating elements.
The linear expansion coefficient,heat conductivity and specific heat of U shape heating element will change along with
temperature change.And the relational date are the follows.
Temperature
Linear expansion
coefficient
(10-6m/C)
Heat conductivity
Porosity rate
(C)
(Kcal/M hrC)
0
/
/
0.148
300
3.8
/
/
400
/
/
O.256
600
4.3
14-18
/
800
/
/
0.294
900
4.5
/
/
1100
/
12-16
/
1200
4.8
/
0.325
1300
/
10-14
/
1500
5.2
/
/
Chemistry property of heating elements
1.Antioxidant property of U shape heating element
The U shape heating element start to being oxidized when heated to 800C in air;and Si02 protection film will be
generated in surface of hot zone when temperature get to 1000-1300C;Cristobalite crystalized at 1300ºC,at 1500ºC
the protection film reaches a certain thickness which make the oxidation speed being most slowly and tends to be
stable.If continuely heat to over 1627ºC,the protection film will be damaged and oxidation speed will be more rapid
evidently and make the U shape heating elements damaged earlier.
Though the U shape heating element will be oxidized very slowly in course of application,it also will make the
resistance increased in use of a long time,this phenomenon is called ageing.In order to lower the ageing speed,
we use special technology to coat a protection film on the surface of hot zone in the process of production,which
enhance the antioxidant property of U shape heating element obviously and lengthen the service life.
2.The effects of alkali and alkaline metal oxide to U shape heating element
The alkal and alkaline metal oxide will react with SiC at about 1300C and generate silicate,which is called
alkali-chemical corrosion,and can influence degree of the U shape heating element glowing.
3.The effects to U shape heating element from melting metal
Some metals,such as cobalt,nickel,chrome and so on ,can corrade the U shape heating element in hign
temperature melting state and affect the service life of heating element.
The key factor to the optimum service life of the U shape heating element is to select the surface load of the
heating element correctly  according to the furnace construction,atmosphere and temperature.Below figure
shows the relation between furnace temperatures,heating element temperature and U shape heating element
surface load under the condition that the heating element radiation isn't obstructed.
Installation and operation of U shape heating element
1.In order to keep furnace temperature and the load-bearing uniform of each heating element,before installation,
the U shape heating element must be grouped,The resistance value deviation of each group should be below +/-10%
2.As the U shape heating element is very brittle,be careful while install and avoid any
damage.
3.When start to operate the furnace ,raise voltage slowly and gradually,never give full load at one time,or the
U shape heating element will be damaged due to the over current impulse.
4.To use the U shape heating element,you should prepare the adjustable transformer or silicom controlled
transformer,voltage meter,current meter and autocontrol temperature meter etc,During the working,the voltage
should be increased,for maintaining the furnace normal temperature because the resistance value will go up
gradually caused by the oxidation of U shape heating element.When the voltage get to the up limit of the
transformer and the temperature is still low than the requirement ,the furnace should be stopped,change
the connection wire way connection and then continuely work.
5.In the course of long operation of the furnace,if any individual U shape heating element is damaged owing
to certain reasons and should be changed ,you should replace it with proper one whose resistance value
corresponds to that of the old one,never use a new U shape heating element random.lf the heating element
is much damaged or its resistance value increases too much and cannot reach the furnace temperature ,
it is better to replace all the silicon carbide heating element with new heating elements.Test and mark the
resistance value of the old heating elements(with voltmeter and ammeter )and distribute them in low
temperature area.
6.The diameter of the hole in the furnace wall is 1.5 time of the U shape heating element diameter and
the clearance to be jam using asbestos rope or aluminum silicate fiber felt.
About Us
Dengfeng City JinYu Electric Heating Material Co., Ltd is a high & new technology
enterprise who is a professional manufacture for electric heating elements,
furnace and anti-fire material products.
Our company locates at Dengfeng city, Zhengzhou, Henan Province, which is less
than 10 kms to the southeast of world famous Shaolin Temple, we have been engaged
in the industry for more than 15 years and won great reputation for high quality,
reasonable price of products and excellent customer service from customers of
American and European countries, Middle East, Russia, Japan, Korea and many
ohter coutries.
There are four main categories of Products: Electric heating elements, Nonferrous
metals products, Furnace and anti-fire material. Our products are widely used in
the industry of glass, Chinaware, lighting, magnetism materials, fluorescent
materials, false crystal, Machinery, Electro Vacuum materials, industrial
apparatus etc.
The long service life and consistent performance of JinYu electric heating elements
is due to our emphasis on quality control, from starting material to finished
product. Our highly experienced engineers will provide you with expert design
necessary for achieving the highest production efficiency at the lowest long-term
cost.
Customers from all over the world are welcome to visit our factory.
Specification
1. Name: Mosi2 heating element
2. Type: ED, DB, ShapeSC, SCR, U, W
3. Production process: Made into blank, silicided under high temperature and re-crystallized.
4. Character: High-applied temperature, anti-oxidization, anti-corrosion, long service life, little deformation, easy installation and maintenance.
Advice of using the element
1. In order to keep furnace temperature and the charges uniform of each element, before installation resistance distribution must be carried.
2. As the element is very brittle, be careful while install and maintain to avoid any damage.
3. When start to operate the furnace, raise voltage slowly and gradually, never give full load at one time.
Usage
Used in various high temperature electric furnaces and other electric heating devices, such as in the industries of magnet, ceramics, metallurgy, glass, and machinery.
Payment Methods
1) L/C;    2) T/T;    3) Paypal;    4) MG;    5) WU
Others main products
1. Molybdenum &Tungsten products.
2. Tungsten copper alloy products.
3. Various of heating elements.
4. All kinds of high temperature Lab furnace.
5. Heating zone for sapphire growth furnace.