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Address: Group 4, Chuling Village, Chaohua Town, Zhengzhou, Henan, China
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Henan Hongtai Kiln Refractory Co.,Ltd. |
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Refractory brick zirconia refractory bricks for high temperature
furnace
Zirconia brick is a refractory product which is mainly made of zirconia.There are two main manufacturing methods: firing method and casting method.There are three types of zirconia crystals: monoclinic, tetragonal and cubic.When the zirconia is heated to about 1100℃, the crystal form changes from monoclinic to tetragonal, accompanied by a volume contraction of 7%, otherwise the volume expands.The cubic form of tetragonal zirconia appears above 2300℃.The densities of the three crystal forms were 5.68g/cm3(monoclinic), 6.10g/cm3(tetragonal) and 6.27g/cm3(cubic), respectively.
1,compact zirconia brick
The isostatic pressing method is used for molding, and its
technical index is ZrO2>65%, apparent porosity <2.0%,
the volume density is about 4.25g/cm3, erosion occurs when the
temperature exceeds 1370℃ in E glass.It is used in the bottom of
the melting part of the E glass unit kiln where the temperature of
contact glass liquid is slightly lower, the bottom of the
transition passage, the forming passage and the flow tank of the
forming passage and the supporting brick of the leakage plate,
etc.In addition, dense zirconium brick is also used as the backing
brick of dense chromium brick.
A new type of dense zirconia brick with coarse-grained structure
has been developed by VGT-Dyko in Germany. The internal structure
of the brick has been greatly improved, and the thermal and cold
resistance of the brick has been improved.Its bulk density is
3.75g/cm3, and its porosity is 17%.This brick is ZS65AR and has
good thermal shock resistance. It is most suitable for drawing flow
tank and leakage plate supporting brick.
2,Standard zirconium brick
The ZrO2 content of the brick is about 66%, the bulk density is
3.7g/cm3, and the brick has good thermal stability and spalling
resistance.It is used in the parapet and back wall of the feeding
outlet area where the powder erosion is more serious, the parapet
and top cover brick of the furnace observation hole and the flame
space of the pass-way and the burner brick.
Zirconia hollow ball products are completely made of zirconia
hollow ball, have good high temperature strength and stable pore
structure, used in ultra-high temperature equipment in the furnace
cover and other parts of the insulation material, such as medium
frequency high temperature furnace, carbon black reactor, tungsten
furnace, molybdenum furnace, etc..
Zirconia hollow ball brick is a kind of heat insulation refractory
product with excellent performance. The highest safe operating
temperature is 2200℃. It is used as a high temperature lining
material directly contacting flame in metallurgical, petrochemical,
electronic and other thermal equipment and has good application
effect.
The production method of zirconia hollow ball brick and the
production method of alumina hollow ball is the same, but its
melting temperature is higher, to reach more than 2700℃, at
present, the domestic widely used CaO as stabilizer.The brick is
made of zirconia hollow balls (65% ~ 70%) and zirconia fine powder
(30% ~ 35%) as raw materials, plus boric acid aqueous solution as
binder. After mixing evenly, the brick is formed by pressure
vibration molding machine. After drying, the prepared brick is
fired at 1700 ~ 1800℃.
The zirconia hollow ball used in the raw material is zirconia as
raw material, calcium oxide (or yttrium oxide, magnesium oxide) as
stabilizer, after uniform mixing, arc melting into molten liquid,
and is made by compressed air injection.Zirconia fine powder is
made of zirconia as raw material, calcium oxide (or yttrium oxide,
magnesium oxide) as stabilizer, evenly mixed, fused into molten
liquid, condensed by crushing and grinding.
Packaging
1. 1 ton bags in container, 25 MT/20'FCL.
2. 25kg bags in container, 25 MT/20'FCL
3. 25kg bags in ton bags, then in container, 25 MT/20'FCL
4. as the customer' request
Packaging of SK37 High Alumina Refractory Brick
1.on wooden pallets with plastic cover: wooden pallet size :930*930
or 1000*1000mm,
2.Load weight of each pallet: 1.5-2.0 tons,
Shipping of SK37 High Alumina Refractory Brick
1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
4.We will shipping and delivery goods timely, quality and quantity
guaranteed, and also in accordance with the contract and customer's
requirement completely.
Delivery:
15-30 days working day for large quantity. The shipment we will
arrange as soon as possible. Of course, if it is a custom products,
the shipping time will delay.
Sample:
Usually by EMS, DHL, UPS, TNT, FedEx. Anyway you like. Bulk order: Usually by sea.
Payment:
It can be through T/T, L/C at sight. The specific terms determined
according to the quantity of the goods, etc.
Your inquiry related to our product & price will be replied
within 24 hours.
Export:
Our products have been exported to many countries: Australia,
Chile, USA, Russia, UK, Indonesia, etc., good quality have be
approved by our clients.
1.Timely response,
Timely response to your inquiry, multiple choice recommendations based on your demand,quickly respond mails and provide solutions.
2.Free sample of dry ramming mass
Sample and trial order are accepted for the quality evaluation
3.Strict quality control
Arrange production on time and control quality strictly.
4.Shorter delivery time.
Book the earliest vessel or plane to guarantee the delivery time.
5.Professional Services
Provide all the detailed news and pictures from order to delivery;offer relative export documents and original certificate if needed;warm and considerable after-sale service.
Henan hongtai kiln refractory co., LTD. : "quality first, reputation first, customer first: it is our
aim."Scientific management, strong technical force, perfect testing
means, advanced technological equipment and stable product quality
are the guarantee of quality service.Henan hongtai kiln
refractories co., LTD sincerely hopes to cooperate with you hand in
hand and in good faith.
Henan hongtai kiln refractory co., LTD. Main products are high alumina brick, clay brick, fused zirconium
corundum brick, fireproof ball lightweight insulation brick,
wear-resistant pouring material, corundum pouring material, low
cement high strength pouring material, impermeable material,
self-flowing material, plastic material, and various types of
refractory materials.For different industries, the cement industry
with anti-flaking high-alumina bricks, alkali resistant bricks,
phosphate bricks;Boiler industry USES all kinds of brand
wear-resisting brick, corundum brick, mullite brick and other
finalizing materials.The company insists on "product quality is the
life, enterprise integrity is the foundation", in the fierce market
competition, won many users' trust and praise.The products are sold
all over the country, as far as Vietnam, India, Korea, Pakistan,
kazakhstan, other southeast Asian countries and regions.
