1600C Sic Silicon Carbide Heaters Molybdenum Disilicide Heating Element 1850C
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Detailed Product Description
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Silicon Carbide Heaters (SiC, up to 1600°C) and Molybdenum Disilicide Heating element (MoSi2, up to 1850°C)
Product advantages: A. It has anti- oxidation and automatic repair function and can be
used continually in oxidative atmosphere. B. We are using thermal processing in shape, which maintains a very
good high-temperature tenacity and plasticity of the basic
materials. Besides the products in the standard size and geometric
shape, we can also produce special shape and size products
according to the requirement from customers so as to meet their
demands of various installments. C. In the cold and hot end welding aspect, it uses special joint
technology to take shape. Therefore, the welding point is fast and
strong anti-impact. No damage caused by caused by the impact of
current during the in and outage .no rupture caused by installation D. The product has high density that greatly improves the
conductivity of the product. Our products are warming faster, lower
consuming lower than the products of other manufacturers, and then
save energy and costs. E. good surface quality, high mechanical strength and toughness. Products catalogue
Physics characters
Chemical property Ant-oxidation in high temperature atmosphere: When MoSi2 bar is
used in the high temperature and oxidative atmosphere; it will form
a compact SiO2 protecting film in its surface to prevent its
continuing oxidized. When the temperature of element is over
1700℃,the SiO2 protecting film whose melting point is 1710℃ will be
melted. Due to the surface tension, SiO2 agglomerate into drops and
lose protection. The SiO2 protecting film is formed again when the
element continues to be used under the oxidative atmosphere. It must be pointed out is that the MoSi2 heating element can not be used in the temperature between 400℃ to 700 ℃ for long time. Otherwise, the element will be pulverized because of the low-temperature oxidation. Main performance index Atmosphere influence on the operating temperature of element
Resistance characters MoSi2 elements have good resistance characteristic. This is the
deciding factor that it can replace conventional heating elements
to be an ideal heating material. Its resistivity is very low in the
greenhouse. As the temperature rises, the resistivity increases
rapidly. Therefore, it is self-evident that the product has rapid
temperature increment and low power expenditure. In normal
operating circumstances, the elements resistances is not changing
along with the length of time changes ,so the old and new elements
can be mixed. Product use and maintenance 1. MoSi2 heating elements belong to Metal ceramic material. They
are hard, crisp and low impact strength at room temperature
.Therefore to be careful to avoid damage during transport and
installation. 2. When MoSi2 elements continue use under the oxidative atmosphere,
the surface temperature of 1700 type should not exceed 1700 °
C,1800-type should not over 1800 ℃ and when intermittent use,1700
type-element should not over 1650 ° C,1800type-element can not
exceed 1750 ℃. 3. The MoSi2 heating element should avoid using in the temperature
between 400℃ to 700 ℃ for long time. Otherwise, the element will be
low-temperature oxidized because of the adverse temperature
condition. Furnace dryness New or old furnace not used for a long time needs to be dry before
the use. Generally, the drying temperature is 100-200℃.However, if
the element is used for a long time under the low temperature, it
will cause the low-temperature oxidation. For the little furnace,
the drying time is short, so the influence of several drying hours
is little, but the large furnace need to be dry for a long time,
you had better open the furnace door to ventilate well. you can
open the furnace door ajar with the temperature increment and
completely close until the temperature reach 1000℃ above. Furnace start If the furnace dry out has been completed or does not need drying,
it has to rise its temperature. In order to avoid the over sized
electric current impact and cause the electrical equipment
overload; please go up the furnace temperature according to the
next table.
It should not take a long time when shifting gears. Otherwise it
easily causes the electric current shocking to break the electrical
equipment. Element Replacement If there is a damaged part found in the process of operation, the
first thing you should do is determine its location and get all the
combination elements ready. After that, you should separate the
wire the damaged element clipped to from the screw which is
connected to the generatrix. Then remove the remained refractory
wool and pull out the refractory stoppers. Insert the new
combination elements into the furnace from its roof. Connect all
the wires and get the refractory wool filled, and finally raise the
temperature. |
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