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Help CenterHigh Efficiency Mosi2 Heating Elements
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Now our company supply two types MoSi2 heating elements, one is M1700 type ,
which ensure max. furnace temperature 1650°C; another is M1800 type, which
ensure max. furnace temperature 1700°C. When you place order, please choose
suitable type according to your furnace working temperature.
Standard sizes:
M1700 type (d/c): Φ3/6, Φ4/9, Φ6/12, Φ9/18, Φ12/24
M1800 type (d/c): Φ3/6, Φ4/9, Φ6/12, Φ9/18, Φ12/24
Installation of elements
1. Vertically Hanging
Under normal temperature,MoSi,element is very brittleness,while under high
temperature it is plasticity.So,the better way for installation if the UShape
element is to hang it vertically,to the furnace top through the support clamping
chuck H.The aim of such way is to avoid putting the mechanical stress directly to
the element heat-generating end ,or the element will easily be broken.
2.Support Clamp
Support clamp are applied to &9/18 and &6/12 two kinds of elements respectively. the
support clamp supports the whole weight of the element and the position of the element
is also determined by it .therefore ,it must be installed carefully to assure that the
element it veryically hung. in order to prevent the element from being over heated
locally, the taper part of the element lower end must put into the furnace chamber.
3.wire clip
The wire connection clamp connecting MoSi2 element is made of aluminum woven
wire or multilayer aluninum foil. the steel plate outside it only acts as a clamp and isn't
used for electric conduction.For&6/12 element, single rowing wire is used ,and for
&9/18element,double-rowing wire is used ,the end of the lead wire should be a little
larger than the linear distance between the element and bus.
when the element is installed, the thread fixing the wire clip shouldn't be screwed too
much at one time, it can be tightened when the element rises to high temperature, as
the element has some plastic and isn't easily broken .the temperature of the wire clip
generally shouldn't be higher than 200 C .therefore, the contact voltage between the
clip wire and element should be lowered to 0.1V, in order to avoid that the radiation
heat is conducted to the clip,the distance should not less then 50mm between the low
end of the clip and upper surface of the through brick. Generally, the Dia.6 element
can't be used of 170A for a long time. The Dia.9 element can't be used of 300A for a
long time.
Technical Data
|
Density |
Bending Strength |
Hardness |
Apparent Porosity |
Water Absorption |
Elongation |
Fracture Toughness |
Compressive Strength |
|
5.8g/cm3 |
350Mpa |
12.0Gpa |
±2% |
1.2% |
4% |
4.5Mpa.m1/2 |
650Mpa |
The influence of operation temperature on the heater surface in a different atmosphere
|
Atmosphere |
1700 Type |
1800 Type |
|
Air |
1700 |
1800 |
|
N2 |
1600 |
1700 |
|
He |
1600 |
1700 |
|
-80°C Dry H2 |
1150 |
1150 |
|
-20°C Wet H2 |
1450 |
1450 |
|
10%CO2, 50%CO, 15%H2 |
1600 |
1700 |
|
40%CO2, 20%CO |
1400 |
1450 |
|
Cracked and Partially Burnt Ammnia |
1400 |
1450 |
It can be widely used in such applications as sintering and heat treatment on ceramics,
magnet, glass, metallurgy, refractory, etc.
Notice to Furnace Operation:
To avoid high current surges which may cause damage to MoSi2 heating elements, the recommend starting procedure as following:
|
Small Furnace (Power 100KW) |
Big Furnace (Power 100KW-500KW) |
||
|
Furnace Temperature .C |
Voltage |
Furnace Temperature .C |
Voltage |
|
20-150 |
1/3
|
20-300 |
1/3 |
|
150-500 |
2/3 |
300-700 |
2/3 |
|
500-Working Temperature |
Full |
700-working Temperature |
Full |
|
Note: Shifting gear must be done quickly, otherwise high current surges may cause damage. |
|||
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