NT-26 Light Weight Insulating Firebrick for industrial oven

NT-26 Light Weight Insulating Firebrick for industrial oven

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 1000 pc

Supply Capability:: 1000000 pc/month

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Quick Details

Place of Origin:	Shandong, China (Mainland)	Shape:	Brick	Material:	Mullite
SiO2 Content (%):	50%~65%	Al2O3 Content (%):	54%	MgO Content (%):	0.8-1.2
CaO Content (%):	0.01	CrO Content (%):	0.1~0.3%	SiC Content (%):	1.2-1.4
Model Number:	NT-26	Brand Name:	CNBM	color:	white
Dimension:	23011465 mm	Density:	800kg/m3

Packaging & Delivery

Packaging Details:

carton+pallet/pallet

Introduction

NATI Insulating Firebrick own light weight, with mini-pore equally distributed, compared with common firebricks, so NATI IFB keep furnace wall low heat loss and save the cost of fuels, NATI IFB also means lower heat storage, heating and cooling more fast, easy for discontinuous operation. NATI IFB is suitable among the range 900℃~1650℃.

Characteristics

*Low thermal conductivity

*Low impurity content

*High strength

*Excellent resistance to thermal shock

*Resistance to erosion

*High accuracy of dimension

Typical Application

*Lining for hot-surface of industrial furnaces, such as carbon furnace, cracking heater, heating furnace for oil refining, annealing furnace, roller kiln, tunnel kilns etc

*Back-up lining of industrial furnaces, such as glass tank kiln

*Deoxidizing atmosphere furnace

Physical & Chemical Data

Description		NT-23	NT-26	NT-28	NT-30	NT-32
Classification temperature (℃)		1300	1400	1500	1550	1600
Density (kg/ m3)		650	800	900	1000	1100
Rupture Strength (Mpa)		0.8	1.2	1.4	1.6	1.8
Thermal conductivity rate W/m.k		0.15	0.26	0.33	0.38	0.42
Pressure strength (ASTM C93,Mpa)		1.1	1.8	2.5	2.8	3.0
Shrinkage after heavy firing at (℃×8h)(%) JIS R26		0.3 (1230)	0.4 (1300)	0.6 (1500)	0.6 (1550)	0.6 (1600)
Chemical composition(%)	AI2O3	40	54	62	74	80
Chemical composition(%)	Fe2O3	1.2	0.9	0.8	0.7	0.5
Matching refractory mortar		NT-1300 mortar	NT-1400 mortar	NT-1500 mortar	NT-1500 mortar	NT-1600 mortar

Q:What is the difference between corundum and high alumina??: The difference between them lies in the content of alumina and the alumina refractory products with alumina content higher than 48%The content of Al2O3 is higher than 90%, which is called corundum brick.

Q:Difference between low creep high alumina brick and ordinary high alumina brick: Low creep and high alumina brick is based on the theory of "three stones". The combination of bauxite and clay as the main raw material, adding kyanite, andalusite and sillimanite, commonly known as the "three stone" control, physicochemical index and size composition, using alumina mullite corundum + + raw materials such as technical scheme. In the production process, first to detect and control indexes of raw materials, crushing, grinding, sieving process, according to the distribution ratio of ingredients, the size and moisture control of mud mixing after to meet the requirements of forming and molding machine, the use of qualified abrasives, blow molding control number, size and flash at the same time, the detection efficiency of semi-finished products and meet the requirements. Production process: high temperature calcination of high-grade alumina, adding small creep rate of high temperature materials, by high-pressure molding and high temperature firing. It has the characteristics of high strength, low creep rate and high use temperature. Widely used in high temperature furnace, hot air furnace hearth lining, brick and so on.

Q:What are the characteristics of high alumina bricks?: A neutral refractory with an alumina content of more than 48%. Made from alumina or other raw materials of high alumina content; formed and calcined.

Q:What are the high aluminum bricks made of?: The amount of refractory mud accounts for about 6% of the brick weight

Q:Use of high alumina refractory bricks?: High alumina refractory brick in Al2O3 more, close to neutral refractory material, can resist acid slag and alkaline slag erosion, because it contains SiO2, so alkaline slag ability than acid resistance slag ability less.It is widely used in building blast furnace, hot blast furnace, furnace top, blast furnace, reverberatory furnace and rotary kiln lining. In addition, high alumina bricks are widely used as furnace regenerative checker, pouring system for plug nozzle, etc..

Q:What refractory material does cupola lining use?: It's made of high quality refractory material: 1770 ~ 2000 centigrade.

Q:How much is one ton of high alumina refractory brick?: High alumina refractory brick according to the different content of AL2O3 is divided into grade, grade one and grade two, and grade three high aluminum brick, Zhengzhou Kang Hui refractories factory price in 800-1900 yuan / ton, stable quality, are exported to the domestic and foreign markets.

Q:What is the standard size of high alumina brick?: The country has laid down a number of criteria for the use of refractory bricks to unify market demand.

Q:Density of high alumina bricks: Alumina content of 48% or more, mainly from mullite and glass phase or corundum composition of lightweight refractory. The volume density is 0.4 ~ 1.35g/cm3. The porosity is 66% ~ 73%, and the compressive strength is 1 ~ 8MPa. Better thermal shock resistance.

Q:What should be used as binder for making high alumina bricks?: In addition, high alumina micro powder can be used as binding agent, or high alumina micro powder and clay powder are prepared according to a certain proportion, and synthetic mullite is used as bonding agent. With these binders, high alumina bricks without two expansion can be prepared.

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