High Alumina refractory fire bricks for kilns

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Products	High Alumina refractory firebricks for furnaces and Kilns
Applications	furnaces and Kilns
Features	1,Good performance of anti alkali erosion resulted from raw material and fuel
	2,Good thermal shock resistance
	3,High mechanical resistance
	4,Low porosity
	5,low thermal conductivity

Technical Data

Index Products		Spalling Resistant High Alumina Bricks
Al2O3	%	≥70
Fe2o3	%	/
Bulk Density	g/cm3	≥2.5
Apparent Porosity	%	≥23
Refractoriness under Load(0.2MPa)	℃	≥1470
Cold Crushing Strength	Mpa	≥70
Thermal Shock(1100℃,water cooling)	times	≥25

Apperance Control Item	Method	Sampling Size	Specification
1,Crack	Visual Check	100%	Crack Width<0.5mm< span=""> Crack length<20mm< span="">
2,Chip,Lost corner	Visual Check	100%	A+B+C<30mm< span="">
3,Lamination	Visual Check	100%	No Lamination
4,Spot	Visual Check	100%	A+B<10mm< span=""> Or <3spot/piece
5,Fin	Visual Check	100%	No Fin
Size &Dimension
1,Shape	ASTM C134	Follow ISO5022	Conform to drawing
2,Dimension	ASTM C134	Follow ISO5022	As size tolerance in drawing For General Brick << span="">100mm drawing±1.5mm >100mm drawing±1.5% For Sk38 Brick All side:drawing ±1mm For Rotary Kiln Brick L,a,b:drawing±1.0mm H:drawing±2.0mm
3,Squareness	ASTM C134	Follow ISO5022	<< span="">100mm drawing±1.0mm >100mm drawing±1.0%
4, Warpage	ASTM C134	Follow ISO5022	For General Brick << span="">0.4%from diagonal line For Basic Brick used in Rotary Kiln << span="">0.2%from diagonal line
5,Slope	ASTM C134	Follow ISO5022	Drawing ±1mm
6,Taper	ASTM C134	Follow ISO5022	<< span="">1.5mm

$High Alumina refractory fire bricks for kilns$

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.

Q:What is the content of free silica in the refractory bricks of high alumina bricks?: Refractory powders are not rich in free silica in varying degrees

Q:The cloth blowing is not uniform on the lime kiln refractory brick is damaged it: Lining 1 yuan to prevent direct damage to the Sindh kiln high temperature flame or air, to protect the kiln carcass; 2, to prevent harmful substances (CO, SO2) erosion of the kiln body; 3, to prevent corrosion, material flow on the kiln body; 4, reduce the kiln temperature, kiln body to prevent oxidation 5, has the function of corrosion; thermal insulation; 6, to improve the coating performance.

Q:What is the standard classification of high alumina bricks and high alumina bricks?: High alumina brick is one of refractory materials. The main component of this kind of refractory brick is AL2O3. High alumina brick refractory clay brick and brick than refractoriness to high. It belongs to high refractory. High alumina brick Al2O3 more, close to the neutral refractory material, can resist acid slag and alkaline slag erosion, because it contains SiO2, so the ability of alkaline slag resistance than acid resistant slag ability is weaker.According to the number of AL2O3 content is divided into, 55,65, 75,80 and so on several grades.

Q:The difference between ordinary and diatomite brick refractory brick: Insulation products made from diatomaceous brick and porous diatomite. The main raw material is natural porous diatomite, and then a small amount of clay and fuel are added. The volume density of diatomite brick was 0.7g/cm3, compressive strength at room temperature is 1 ~ 2MPa, the coefficient of thermal conductivity at 400 C for 0.13 ~ 0.20W/ (M - K), the apparent porosity is greater than 70%, the coefficient of thermal expansion (1280 degrees) 0.9 x 10 - 6 DEG -1, refractoriness is greater than 1250 DEG C. Mainly used in industrial kilns and other thermal equipment, thermal pipes insulation materials, generally withstand the hot surface temperature of about 1000 degrees celsius. Mainly used in industrial kilns and other thermal equipment, thermal pipes insulation materials, generally withstand the hot surface temperature of about 1000 degrees celsius.

Q:Is there a big difference between two high alumina brick and one high alumina brick?: The difference between the two kinds of high alumina bricks is great. I perennial in Zhengzhou was responsible for the production and sale of colt refractories

Q:Which thermal shock stability of clay brick and high alumina brick is good?: The product has the advantages of high temperature, little creep, strong corrosion resistance and good thermal shock resistance, and is suitable for large and medium-sized hot blast stoves.Thermal shock stability is much better than clay brick.

Q:The difference between light high alumina brick and heavy aluminum brick: Lightweight high alumina bricks, commonly called insulating refractory bricks, also known as insulating refractory bricks. First of all, literally, lightweight aluminum bricks and heavy aluminum bricks are very different in weight. Lightweight high alumina bricks, also called insulated high alumina bricks, are designed for insulation and heat preservation. In normal use, the utility model is not directly contacted with the furnace temperature, and is a refractory brick product which is close to the furnace wall and has the function of heat insulation and heat preservation.

Q:What are the alloy wear resistance materials?: KNMn19Cr2 (patent) high manganese alloy (ZGMn13Cr2MoRe), super high manganese alloy (ZGMn18Cr2MoRe); two: anti-wear chromium cast iron series: such as high, medium and low chromium alloy cast iron (Cr15MOZCu); three: wear resistant alloy steel series: such as, low and high carbon multi metal combined steel (such as ZG40SiMnCrMO and ZG35Cr2MoNiRe); four: ADI (ADI) series; five: all kinds of composite or gradient material and hard alloy materials, nano KN alloy (patent product): such as chromium carbide composite (Cr2C3+Q235), high-energy ion osmosized tungsten carbide materials (WCSP), high toughness of cemented carbide (YK25.6), KN999 nano alloy (Beijing Naimo patent) etc.;

Q:Does the chimney have high acid resistance?: The acid resistant bricks used for chimney are usually made of custom-made trapezoidal acid proof bricks, and the physical and chemical indexes of acid resistant bricks need to be confirmed according to the chimney's actual emission. At this point, you can consult our kerei refractories.

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