Our Company specializes in supplying finest quality Refractory Half round, broadly used in foundry, boilers, furnace, and many more place. This Half round is carefully processed by our deft professionals using well tested basic material.
In order to provide best in class product this Half round is strictly checked on several parameters by our quality expert.
Available Size.(In Inch)
14X9X6, 16X9X6, 18X9X6, 21X9X6, 24X9X6.
We are a leading company which offers Arch Block. Developed and designed by the leading industry experts, these are available in variety of ranges and specifications. Tear resistance and long life are its notable attributes. In addition to this, these blocks are known for their everlasting performance and wide ranging specifications
Available Size. (In Inch)
24X9X6, 27X9X6, 30X9X6, 33X9X6, 36X9X6
We are a worldwide supplier and applications expert of specialty refractory products for the ceramics, metallurgy, chemical, petrochemical, and power generation.
Alexandria modern trade company specialize in products ranging from refractory bricks, tiles and blocks to mortar, cements, with special expertise in high alumina refractories and alumina silicate refractories (high and super duty).
The quality of the products and services of amtc refractories is based on a long track record of our manufacturers being among the largest producers of refractories in north africa, mediterranean, and the middle east & arabian gulf areas with more than 50 years experience in the refractories field.
These refractories are distributed through our large distribution network throughout europe, middle east, north africa, and arab gulf.
Calcined Bauxite is obtained by calcining (heating) superior grade Bauxite at high temperature (from 850 oC to 1600 oC). This removes moisture thereby increasing the alumina content. Compared to an alumina content of about 57 % to 58 % in raw Bauxite, Calcined Bauxite has an alumina content of 82 % to 86 %. The heating is carried out in rotary kilns. Calcination is done at different temperatures ranging from 850 oC to 1600 oC depending upon the customer’s application.
We export Calcined Bauxite for various applications such as refractory bricks, abrasives, steel polishing, etc. We provide consistency in quality and availability of Calcined Bauxite at extremely competitive prices.
Applications of Calcined Bauxite:
Refractory Grade Calcined Bauxite (CB - I and CB - II Grade) : To make refractory grade, Bauxite is thermally treated at 1600 oC to produce Calcined Bauxite where the Alumina content is mostly above 82%.
Brown Fused Alumina, Proppants and Road Surfacing : To make the above grades, Bauxite is thermally treated at 1000 oC - 1200 oC to produce Calcined Bauxite where the Alumina content is anywhere between 80-88% depending on the requirement.
Fly Ash is by product generated during combustion of coal, and comprises the fine particles that rise with the flue gases. Ash which is collected from the bottom is termed bottom ash. Fly ash is collected by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys of coal-fired power plants and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash. Depending upon the type of coal being used, the specification of Fly Ash varies considerably, but Fly Ash contains substantial amounts of silicon dioxide and calcium oxide (CaO), both being endemic ingredients in many coal-bearing rock strata. We are a reputed Fly Ash Exporter based in India and are supplying Fly Ash different cement, ready mix concrete, steel, refractories and construction industries.
The Major Utilization Areas Of Fly Ash :
- Manufacture of Portland Pozzolanic Cement & Performance improver in Ordinary Portland cement (OPC).
- Part replacement of OPC in cement concrete.
- High volume Fly Ash concrete.
- Roller Compacted Concrete used for dam & pavement construction.
- Manufacture of ash bricks and other building products.
- Construction of road embankments, structural fills, low lying area development.
- As a soil amender in agriculture and wasteland development.
Types of Fly Ash:
- According to the type of coal used fly is classified into two types. Anthracite and bituminous coal produces Fly Ash classified as class F. Class C Fly Ash is produced by burning lignite or sub-bituminous coal. Class C Fly Ash has self-cementing properties.
- Class F and Class C Fly Ash are products of the combustion of coal in large power plants. Fly Ash is collected in electrostatic precipitators or baghouses, and then transferred to large silos for shipment. When needed, Fly Ash is classified by precise particle size requirements, thus assuring a uniform, quality product.
- Class F Fly Ash is available in the largest quantities. Class F is generally low in lime, usually under 15 percent, and contains a greater combination of silica, alumina and iron (greater than 70 percent) than Class C Fly Ash.
- Class C Fly Ash normally comes from coals which may produce an ash with higher lime content generally more than 15 percent often as high as 30 percent. Elevated CaO may give Class C unique self-hardening characteristics.
Corundum brick (sintered corundum brick) with dense alumina clinker as raw material made of corundum brick. The brick has a high melting point, stable performance at high temperatures, room temperature and high temperature mechanical strength and wear resistance is good. Anti-metal erosion and anti-oxidation, superior performance.
Fire clay & High Alumina bricks are special type of brick which are form of Refractory ceramic material. It is used for inner surface lining of Boiler, furnace, kiln, fireplaces & fireboxes.
Quality of Bricks:
We offer various quality bricks are IS-6, IS-8, PI - 30% to 90% Alumina offering high temperature resistance of 1100 C to 1700 C.
SK 34 Fire bricks are special type of brick which are form of Refractory ceramic material. It is used for inner surface lining of Boiler, furnace, kiln, fireplaces & fireboxes.
Quality of Bricks:
We offer various quality bricks are 35 to 40% Alumina offering high temperature resistance.
Standard Sizes (MM):
230 x 115 x 75 MM
230 x 115 x 65 MM
SK 36 Fire bricks are special type of brick which are form of Refractory ceramic material. It is used for inner surface lining of Boiler, furnace, kiln, fireplaces & fireboxes.
Quality of Bricks:
We offer various quality bricks are 50 to 55% Alumina offering high temperature resistance.
Standard Sizes (MM):
230 x 115 x 75 MM
230 x 115 x 65 MM
For refractory materials, sintering is very important, whether it is natural raw materials, or synthetic raw materials, have to be burned, to sinter before use, fire-retardant refractory products is to achieve the date of sintering. Unshaped refractory materials in the process of gradually sintering.
From a process point of view, sinter is a sturdy, low porosity (almost airless 7L) stone made from a powder at high temperatures.
Refractories degree of flexibility of the signs, usually with the object size reduction (the so-called shrinkage), reduced porosity and bulk density increased to measure.
Sintering is mainly due to the strengthening of refractory material, the inevitable result of increased contact between the particles. Sintering (intrinsic) has the following processes: changes in the shape of the pore size phase; crystal growth, residual stress (suppression) reduction and equilibrium; liquid phase formation; redistribution of phase space; In many cases, sintering accompanied by multi-phase transformation of certain phases, solid-phase chemical reactions or liquid-phase reactions. The reaction forms a new phase and a solid melt.
The final cooling complicates the enumeration process, with some of the opposite processes occurring. Multi-product changes, melt crystallization and crystallization pressure may occur, the formation of the glass phase and other phenomena. Like the lower temperature drop, the refractory material produces stress and often produces macroscopic defects so that the refractory products are discarded. Temperature gradients, temperature change rates, phase and concentration gradients, atmospheres, high frequency field effects, vibrations and other conditions in a refractory body all depend on the temperature. Even within the refractory material. y1 its temperature changes have a very complex phenomenon, can not fully enumerate the occurrence of the process
Our company supply various refractory material, such as
1). Fire bricks
2). High alumina brick
3). Insulation brick tm23, tm26, tm28
4). Resist aid brick
5). Ceramic fiber blanket
6). Castables, mortars , cements, ramming mixes
The specification of fire brick is as follows:
Fire bricks for general use
Y-fb gfb40 gfb42 gfb45
Al2o3(%)min. 40 40 42 45
Fe2o3(%)max. 2.5
Refractoriness()min. 1710 1730 1750 1750
Refractoriness under load 0.2mpa()min. 1300 1350 1400 1400
Apparent porosity(%)max. 22 20 20 20
Cold crushing strength (mpa)min. 30 30 35 40
Linear change after reheating(%)max.
At 1350íß2h +0.1
-0.4
At1400x3h +0.1 +0.1 +0.2
Also we can supply the product as per the customers' requirement.
Fire bricks for general use
Y-fb, gfb40, gfb42, gfb45
Al2o3(%)min.: 40%, 42%, 45%
Refractoriness.:1710, 1730, 1750
Our main exporting brand of refractory bricks are:
Direct bonded magnesia-chrome bricks
ííííthe product is manufactured by taking high purity magnesia and high quality chrome as raw materials through the process of high pressure moulding and high temperature burning.It has a good thermal shock resistance and volume stability and is applied in the cement and glass industries.
Main physiochemical property indexes of product
Chemical composition and technical performance
Product brand
Lzmg-5
Lzmg-8
Lzmg-12
Lzmg-15
Mgo(%)
í²70
í²65
í²60
í²55
Sio2(%)
ín1.5
ín1.5
ín1.8
ín1.8
Cr2o3(%)
í²5.0
í²8.0
í²12.0
í²15.0
Apparent porosity(%)
ín18
ín18
ín18
ín18
Cold crushing strength(mpa)
í²40
í²40
í²40
í²40
0.2mpa refractoriness under load t0.6(oc)
í²1650
í²1650
í²1650
í²1650
Thermal shock resistance(1300oc air cooling)
í²20
í²20
í²20
í²20
Also we specially in exporting submerged entry nozzle, sliding plate, ladle and tundish nozzles and well block, etc.
Herewith please find some typical refractory material which we have been exported for your reference:
