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Address: Group 4, Chuling Village, Chaohua Town, Zhengzhou, Henan, China
Contact name:Liu
Henan Hongtai Kiln Refractory Co.,Ltd. |
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High quality light weight fire
brick refractory brick for insulation in industry furnace
Description of Light weight fire brick
There are many kinds of Light weight fire brick. Hongtai resistance materials introduce you to lightweight high aluminum bricks and alumina hollow ball bricks.These two products have excellent thermal insulation performance and are applied to various thermal equipment to reduce heat loss and improve production efficiency.
Light weight fire brick is also called high-alumina insulation brick with alumina content of more than 48%.Volume density: 0.4-1.35 g/cm3.The porosity is 66% ~ 73%, and the compressive strength is 1 ~ 8MPa.Good thermal shock resistance.Usually use high bauxite clinker and a small amount of clay, the fine grinding method or bubble method using gas before and after the pouring and forming in the form of mud, burn into the 1300 ~ 1500 ℃.Sometimes industrial alumina can be used instead of some alumina clinker.Used for lining and insulating layer of kiln furnace, as well as parts without strong high temperature melting material erosion and scour.Direct contact with the flame, the contact surface temperature is not higher than 1350 ℃.
Alumina hollow ball is a new kind of high temperature heat
insulation material, which is made by smelting and blowing of
industrial alumina in electric furnace.In alumina hollow ball as the main body, can be made into various
shapes, the highest temperature 1800 ℃, high mechanical strength,
general light products several times, and the bulk density is only
half of the corundum products.It has been widely used in high temperature and ultra-high
temperature kilns such as petrochemical gasifier, carbon black
industrial reaction furnace and induction furnace in metallurgical
industry.
The inner part of Light weight fire brick system is a fixed block heat insulation firebrick with thermal insulation property of porous structure.Lightweight thermal insulation firebricks are usually classified and named according to their materials or materials used in manufacturing.For example, light refractory bricks made from clay, silica and high aluminum are respectively called light clay bricks, light silica bricks and light high aluminum bricks.The following lists the types and characteristics of lightweight thermal insulation firebrick by the materials and ingredients used in the manufacture of lightweight firebrick.
Light weight fire brick
Main characteristics of Light weight fire brick
Light weight fire brick are heat insulation and heat insulation, which can be used in the outer layer of the furnace wall, so as to ensure the efficient use of thermal energy of the equipment, but not to cause explosion due to high heat conduction.Where contact with the flame in the hearth with heavy high alumina brick, this after the high temperature of 1775 ℃ to suppress calcination of refractory material, have very strong heat the effect of high temperature resistance and erosion resistance, long time under the condition of high temperature deformation does not fall off.
Light weight fire bricks and heavy high-alumina bricks each have their own advantages and disadvantages. Only by laying them according to different positions of kiln furnace and functions required can they extend the service life of equipment and improve the safety production level.
Technical datas of Light weight fire brick
| Items | Technical Data | |||
| LTL-0.6 | LTL-0.8 | LTL-1.0 | LTL-1.2 | |
| Al2O3% | 50 | 50 | 55 | 66 |
| Fe2O3% | 1.8 | 1.8 | 1.8 | 1.8 |
| Bulk Density (g/cm3) max | 0.6 | 0.8 | 1 | 1.2 |
| Cold Crushing Strength (Mpa) min | 2 | 3.98 | 4.98 | 5.98 |
| Thermal Conductivity 350±25℃ (W/m*k) max | 0.25 | 0.29 | 0.35 | 0.45 |
| Reheating Linear Change | ≤1 1350℃*12h | ≤1 1400℃*12h | ≤1 1400℃*12h | ≤1 1450℃*12h |
High temperature characteristics of Light weight fire brick
(1) high temperature resistance.
(2) fast cold and hot, good thermal shock resistance.
(3) good thermal insulation and thermal insulation.
(4) large porosity, small volume density and light weight.
(5) the construction is convenient, and it can be processed or cut into any size, also known as high aluminum polymer light cutting and grinding bricks.
The Light weight fire bricks are mainly used for high temperature insulation layer of kiln, and can also be used for lining of kiln with flame contact, but they are not suitable for direct erosion by slag.It can also be used in kilns with hydrogen, carbon monoxide and other gases as protective atmosphere.
Lightweight insulation brick production method and the general density material is different, many methods, mainly include the burning addition method, bubble method, chemical method and porous material freely method, etc.
(1) high temperature resistance.
It's also called fuel addition.Add combustible materials, such as charcoal dust and sawdust, into
the mud of brick making, so that the products have certain porosity
after burning.
3) chemistry.A porous product, usually dolomite or magnesite with gypsum, is obtained in the process of brick making by chemical reaction which can produce gas properly. Sulfuric acid is used as foaming agent.
4) porous material method.Lightweight firebricks are made from porous materials such as natural diatomite or artificial clay foamed clinker, alumina or zirconia hollow spheres.
The use of light thermal insulation bricks with low thermal conductivity and small thermal capacity as furnace structural materials can save fuel consumption.Can improve equipment production efficiency;It can also reduce the weight of furnace body, simplify the structure of furnace, improve the quality of products, reduce the temperature of environment and improve the working conditions.Lightweight insulation bricks are often used as insulation layer, lining or insulation layer of kiln.
Packing of Light weight fire 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,
3.230*114*65mm:512PCS/Pallet, 230*114*75mm:448PCS/Pallet.
Shipping of Light weight fire 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, quanlity and quantity
guaranteed, and also in accordance with the contract and customer's
requirment completely.
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. Export experiences:
Now we have gained a global sales network reaching Taiwan, Russia,
Vietnam, Pakistan, Bulgaria, French, India, Congo, Angola, South
Africa, and so on.
4. 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.
5. Testing equipment:
Our company's testing equipments as follows:
High Temperature RUL Tester
Bulk Density Tester
The Pressure Tester
Refractoriness Tester
Certificates
