High Alumina Brick NT-26 Lightweight Insulating Firebrick for Industrial Oven

High Alumina Brick NT-26 Lightweight 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

NT-26 Light Weight Insulating Firebrick for industrial oven

Q: In 2016, a few of the traditional refractory materials will be able to survive: From the year 2015 to the year 16 the end of the year, refractories industry presents two kinds of situations: one is a small business, a single product variety and equipment, to meet the demands of both environmental protection and the downstream market, such enterprises are generally in the Qing state inventory;

Q: What are the grades of high alumina bricks?: High alumina brick according to the aluminum content is generally divided into: super high alumina brick, a high aluminum brick, two high alumina brick, three high alumina brick

Q: What is the standard size of high alumina brick?: Standard brick: 230 x 115 x 65; four points: 230 x 115 x 40; three points: 230 x 115 x 30; 150 x 120: Brick gable. Light weight brick 1 to 1.7 kilograms; heavy clay superscript brick weighs 3.75 kilograms; light 30 plates 0.79 kilograms; light 40 plates, 1.05 kilograms.

Q: What is the difference between T3 refractory bricks and high alumina refractory bricks?: The T3 in T3 refractory bricks refers to the model indicating that the refractory brick model is T-3, and that the corresponding T-3 model is 230*114*65 (mm)

Q: Aluminum content 38, silicon content 55 What refractory bricks?: High alumina brick:The mineral composition of the high alumina brick is determined by the bauxite used. The mineral composition of the clinker is usually mullite, corundum and glass. The theoretical composition of mullite is Al2O371.8%, SiO2 28.2%, and its melting decomposition temperature is 1840 DEG C. With acicular crystal, network cross structure, high temperature state showed better strength. Corundum in the form of alpha -Al2O3, melting point of 2050 degrees, hardness of Mohs 9, showing a granular and columnar crystal, has good chemical stability, acid, alkaline slag have a certain resistance. Based on the composition of mullite minerals, the phase composition of high alumina brick can be judged according to the content of Al2O3. When the bricks are below Al2O3 71.8%, the base of the composition is mullite and SiO2, such as grade LZ-48 bricks. Because it contains a large number of SiO2 formed in the liquid phase under high temperature is 20% ~ 30%; brick in Al2O3 more than 71.8%, the excess Al2O3 formed corundum crystal under high temperature, while generating 2 high temperature phase, eutectic temperature rise by the low content of Al2O3 brick 1595 C to 1840 C, such as grade LZ-75 brick. In fact, it is impossible to produce a complete phase equilibrium in the process of production, but the glass phase is very small, and there is no more than 10% in the partial gap of the Yu Jing phase

Q: What is the content of free silica in the refractory bricks of high alumina bricks?: In the meantime, the free silica content of silicon brick is as high as 90% above. Therefore, the most serious damage is silicon brick, followed by clay brick, high alumina brick, magnesia brick and so on.

Q: Which is faster for heat transfer between corundum bricks and high alumina bricks?: 75 high aluminum and 43 clay bricks, 75 single weight 4.5kg or more. 43 3.65kg or so, the use of temperature 75, high aluminum in about 1520, 43 of brick 1430 or so, the color of 75 pan white, 43 of the Loess color. In short, the difference is great.

Q: What is spalling resistant high alumina brick?: Spalling resistant high alumina brick is a kind of high alumina brick. Antistripping high alumina brick with high grade bauxite and containing Zr02 synthesis as raw material, according to a certain proportion by high pressure molding system in sintering products, products with anti stripping ability, and have the anti erosion potassium, sodium, sulfur, chlorine and alkali salt, low thermal conductivity and other properties that is the transition zone of cement kiln and decomposition of ideal material with remarkable characteristics, the product is good thermal shock resistance, strong ability to adapt to the environment. It is used in the preheating or decomposing furnace, grate cooler and so on.

Q: What kind of material is the general metal case?: Generally speaking, the outer surface of the case is usually made of a steel plate of more than 1 millimeters. The thickness and the material of the steel plate are directly related to the rigidity of the case, as well as the capability of sound insulation and anti electromagnetic radiation. The regular manufacturers of the chassis plate thickness not less than 1.3mm, but there are also some small manufacturers with a thickness of only about 1mm steel, we do not need the ruler to the amount, as long as you put him up, the more weight in the same volume of the chassis is better, in addition, we can also use the finger bomb case shell. If you can hear the crisp percussion sound proof of the casing plate is thin and brittle, if you hear is relatively dull and heavy sound that the chassis material must be good, good general steel plate coated with a layer of thin zinc (bright part), so it can withstand high strength, impact resistance, hardness high elasticity. The frame parts of the chassis are made of high quality materials with high hardness. They are bent into angle shapes or strip shapes. We can shake the chassis frame of the case by hand. Good chassis should be relatively stable, and inferior chassis light is easy to shake. When choosing, we should also pay attention to the outer edge of the case and the edge of the inner bracket. Whether the incision is smooth or not, a good case will not appear in the case of rough edges, sharp edges, burrs and so on. While the poor case appears above phenomenon, often appear when installing the blood splattered". Generally speaking, the chassis must go through the corresponding grinding process before leaving the factory. The edge of the flat plate some burr, edges and corners are rounded, the corresponding fold some corner. When you install such a case, you don't worry about cuts, and some rough, poorly built cabinets tend to scratch your hands.

Q: How does the physicochemical index change when the high alumina brick is used at high temperature?: When the high alumina brick is used at high temperature, the physical and chemical indexes and other constants will not change if the temperature is in the physical and chemical indexes and the softening temperature of the load.

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