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2022 hotsale Henan Hongtai kiln refractory supply lightweight silica insulation brick for glass furnace
Lightweight silica insulation bricks are also called silica insulation bricks. Lightweight refractory material with silicon dioxide above 91% and bulk density below 1.2g/cm3. The refractoriness and softening temperature under load are not much different from ordinary silica insulation bricks with the same composition. However, due to the many pores, the compressive strength, slag resistance, and corrosion resistance are not as good as ordinary silica bricks, but the thermal shock resistance has been improved.
Using finely divided silica as raw material, the critical particle size is usually no more than 1mm, and the particles smaller than 0.5mm are no less than 90%. It is prepared by adding flammable substances to the ingredients or adopting the gas generation method to form a porous structure and firing. Can also be made into unburnt products. It is mainly used for all parts of the kiln that requires heat insulation or lightening of its own weight without direct contact with the melt, free from corrosive gas, and not subject to sudden temperature changes. It is used at high temperature and cannot be in contact with alkaline refractory materials. According to different materials, the highest operating temperature is 1200~1550℃.
Silica insulation bricks generally use crystalline quartzite
or silica sand as raw materials, and the mineral composition is:
phosphorite 78% to 86%, cristobalite 13% to 15%, and quartz 4% to
7%. Add combustible materials to the ingredients, such as coke,
sawdust, anthracite, carbonized rice husk, or use gas foaming to
form a porous structure. Silicone heat-insulating refractory bricks
are heat-insulating silicon refractory products with a SiO2 content
of more than 90% and a bulk density of less than 1.2. The
refractoriness and softening temperature under load are not much
different from ordinary silica bricks with the same composition.
However, due to the many pores, the compressive strength, slag
resistance, and corrosion resistance are not as good as ordinary
silica bricks, but the thermal shock resistance has been improved.
It is similar to the production process of ordinary silica bricks.
Some mineralizers (CaO, Fe2O3) are added to the ingredients to
promote the conversion of quartz, and pulp waste liquid is used as
a binder to make the bricks have a certain strength. When using
coke or anthracite as combustible additives, because the ash will
be brought into Fe2O3 and Al2O3, there is no need to add iron
scales in the ingredients. When the siliceous heat-insulating
refractory bricks are fired, a strong oxidizing flame should be
maintained before 1200°C to make the additions burn out completely.
Silica insulation bricks have the characteristics of low
thermal conductivity, high load softening temperature, small
residual expansion, and excellent reburning line change
performance. They are suitable for industrial furnaces such as coke
ovens, hot blast furnaces, glass furnaces and carbon furnaces. It
is mainly used for the heat insulation layer and working layer of
thermal equipment, and can be used for the heat insulation layer of
various high temperature kiln equipment under high temperature
conditions (≤1500℃) without contact with molten slag. This product
is suitable for the heat insulation material of the silica brick
lining of the high temperature hot blast stove of the large blast
furnace and the heat insulation of the silica brick masonry of the
glass furnace.
General lightweight silica insulation bricks can be divided into
two levels: the first grade can be used in the top of the steel
rolling heating furnace and the roof of the silicate industrial
kiln, and can be directly in contact with the flame; the second
grade is used in the general industrial kiln Insulation. Applicable
to: industrial furnaces such as coke ovens, hot blast furnaces,
glass melting furnaces and carbon calciners. Generally, the bulk
density of silicon heat insulation refractory bricks is
0.9-1.1g/cm3, the compressive strength is 2.0-5.9MPa, and the
thermal conductivity is 0.35-0.42W/(m·K). It has excellent fire
resistance, its softening temperature under load is close to 1620℃
for dense silica bricks, with only a small residual expansion, and
its thermal stability is better than dense silica bricks.
Therefore, siliceous heat-insulating refractory bricks can be used
for a long time under high temperature conditions (1500-1550°C)
without contact with molten slag, but they are especially suitable
for high-temperature hot-blast furnaces of large blast furnaces.
Thermal insulation of silica brick gas.
2022 hotsale Henan Hongtai kiln refractory supply lightweight silica insulation brick for glass furnace
Items | GGR-1.0 | GGR-1.10 | GGR-1.15 | GGR-1.20 | |
SiO2 % ≥ | 91 | 91 | 91 | 91 | |
Bulk density g/cm3 | 1.0 | 1.10 | 1.15 | 1.20 | |
Cold crushing Strength Mpa | 2 | 3 | 5 | 5 | |
Refractoriness Under Load 0.1Mpa ≥ ℃ | 1400 | 1420 | 1500 | 1520 | |
Liner change on re-heating rate | 1550℃*2h | -- | -- | 0.5 | 0.5 |
1450℃*2h | 0.5 | 0.5 | -- | -- | |
Thermal Conductivity 350 ℃ W/(m.k) | 0.55 | 0.60 | 0.65 | 0.70 |
Straight | Split | Arch | Wedge | Tile | Other Shape |
L×W×H(mm) 230×114×65 230×114×75 | L×W×H (mm) 230×114×25 230×114×32 230×114×37 230×114×50 | L×W×H/h(mm) 230×114×65/45 230×114×65/55 230×114×75/45 230×114×75/55 230×114×75/65 | L×W×H/h (mm) 230×114×65/45 230×114×65/55 220×114×75/45 220×114×75/55 220×114×75/65 | L×W×H (mm) 230×230×38 230×230×50 230×230×65 230×230×75 | Key brick, Skew brick, Soap, Checker, Neck, Taper, |
We also can make silica insulation brick according to customers' drawing and requirements. |
2022 hotsale Henan Hongtai kiln refractory supply lightweight silica insulation brick for glass furnace
Packing for lightweight silica insulation 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 lightweight silica insulation 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 for lightweight silica insulation brick:
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 for lightweight silica insulation brick:
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.
Your inquiry related to our light weight silica insulation brick
product & price will be replied within 24 hours.
Export:
Our lightweight silica insulation brick products have been exported
to many countries: Australia, Chile, USA, Russia, UK, Indonesia,
etc., good quality have be approved by our clients.
2022 hotsale Henan Hongtai kiln refractory supply lightweight silica insulation brick for glass furnace
1. Strong professional:
Our company has thirty years producing experience in refractory
products. Our manager will supervise on a various refractorys
production materials, process control, quality supervision and
package delivery, and ensure the products are 100% qualified.
2.Annual supply:
Our company has passed ISO9001 quality management system
certification and SGS certification. And the annual supply of
shaped and unshaped refractory product is 28, 800-35, 000
tons.
3. Production equipment:
Production and testing equipments are new, complete and automated
or semi- automated. Such modern facilities and equipments have
provided the fine technical guarantee for the production and
testing.
4. Testing equipment:
Our company's testing equipments as follows:
High Temperature RUL Tester Bulk Density Tester
The Pressure Tester Refractoriness Tester
Hongtai Kiln Refractory has professional sales and after-sale
service team who provide customers all-around service about product
selection, transportation, installation and operation technology
training etc. Now we have established cooperation relationship with
many science and research units and our products have been sold to Vietnam, Thailand, Malaysia, South Korea, Pakistan, Kazakhstan, India, Japan, Indonesia, Germany, Italy, Mongolia, Russia, Argentina,
colombia, Egypt, South Africa and etc.
We has over 20 years experience on producting lightweight silica insulation brick.
Payment Guarantee: If couldn't trust us at first order, could use trade Assurance.
Jerry Li
Cell&WhatsApp: 0086-13373957739
Email: jerry(at)ht-refractory.com