Fireclay Brick - Refractory Fire Clay Brick

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General Information

Fireclay bricks are made from clinker clay. The alumina content ranges from 36% to 48%.

Feature
Low thermal conductivity
High refractoriness
High mechanical strength
Excellent thermal shock resistance

Application
Fireclay bricks are commonly applied in blast furnace, hot blast furnace, teeming ladle, glass furnace, etc.

Item	Index
Item	SK-30	SK-32	SK-34	SK-35
AL2O3 %	30	35	38	45
Fe2O3 %	2.5	2.5	2	2
Refractoriness(SK)	30	32	34	35
Refractoriness Under Load, 0.2MPa, (°C )	1250	1300	1350	1400
Apparent Porosity (%)	22-26	22-26	20-24	20-22
Bulk Density (g/cm³)	1.9-2.0	1.95-2.1	2.1-2.2	2.15-2.22
Cold Crushing Strength (MPa)	20	25	25	30
Thermal Expansion at 1000°C (%)	0.8	0.6	0.6	0.5

Note:

Q:Can porous clay bricks be made of 12 walls to bear weight?: A porous clay brick, made of 12 walls, does not bear weight. The wall is too thin. The load-bearing wall needs 24 walls at least.

Q:What can be applied to the burned refractory brick to resist heat shock?: Acidic refractory material use monox as the main component, among which cilica brick and clay brick are commonly used. Silica brick is silicious product containing monox more than 93%, whose raw materials include silica, waste silica brick scrap and etc. The acid resistance of slag erosion ability is good, and the softening temperature under a fixed load is high. The volume won't shrink after repeated burning, but even a slight expand; but it is vulnerable to the erosion of basic slag, and has low thermal shock resistance. The silica brick is mainly used for coke oven, glass melting furnace, acid hearth furnace and other thermal equipments. Clay brick uses refractory clay as the main raw material, containing 30% to 46% of aluminuum oxide, belong to weakly acidic refractories. It has good heat shock resistance and corrosion stability to acid slag, and it's widely used. Neutral refractory materials use aluminum oxides, chromium hemitrioxides or carbons as the main components. Corundum products containing more than 95% of alumina is a kind of high quality refractory material with wide application.

Q:What are the differences between fireclay brick and high alumina refractory brick?: One is the high alumina, solid and hollow respectively, fused mullite as main raw material made of high-grade refractory materials, strong corrosion resistance, has the advantages of through mud treatment, good thermal shock stability. Good resistance to slag, used to build steel making furnace and glass furnace. High alumina brick is a kind of refractory material. Clay brick is also known as sintered brick, electric smelting corundum and low creep high alumina brick [1] with high grade bauxite, this kind of refractory brick's main component is AL2O3, which is suitable for large and small buildings with artificial bulk. High thermal stability. A neutral refractory material with more than 48% of alumina oxide content, clay brick has clay (including shale, molding, coal gangue and other powder) as the main raw materials, cement rotary furnace lining. The product has a small high-temperature creep, one is clay. From bauxite or other high content of aluminium oxide raw materials' forming and firing, refractoriness is above 1770 deg. High R.U.L and medium-sized hot-blast furnace is different firstly in the material, forming from drying and roasting

Q:How much is the silica powder in refractory bricks.: It's not easy to construct, also need to consider the technical and economic indexes, DH3, 1 kg silica powder replaces 1 ~ 3 kg cement, which is the reason why silicon powder was not used and spreaded in concrete in past, choose some silica power fume. In general, with the smoke escaping by special capture device for collecting and processing To determine the mixing method of silica powder, when mixing silica powder, you should find out the optimal dosage in order to obtain the best results, as the study, the content is 5% ~ 30%, H, the mixing of super high strength concrete, use same amount of silicon powder to replace equal cement to main same fluidity, Microsilica or Silica Fume, it is mainly according to the design requirements, and does not reduce the amount of cement, sand and stone to adjust the optimal dosage of water reducer, when deciding the best mixing amount of silica fume, the concrete is too sticky, most use naphthalene water reducing agent.

Q:Shale brick and clay brick? Answer before you know it: The clay brick with clay, shale, coal gangue as raw materials, crushing, mixing kneading with artificial or mechanical pressing, sintering and building bricks after drying at 900 centigrade temperature by oxidizing flame firing.

Q:When using high alumina refractory brick, what are the reasons leading to the decline of the performance of high alumina brick?: The excess air coefficient is controlled in 1, in order to prevent producing water cracks in the production of high aluminum refractory brick from, control the water absorption of 2 grade clinker of bauxite with high alumina below 4%-5%. 1-1,the water absorption of the tube mill should also be controlled below 6%, and adjust thermotechnical, making the high alumina refractory brick burning be in the stable weak oxidizing atmosphere. should be 2

Q:How to do refractory bricks: There are many varieties of refractory bricks, and the pratice of it is similar to ordinary brick practice, but the requirements of equipment and technology will be much higher

Q:Can refractory bricks be used to pave roads or build a wall?: Complete refractory brick has standard size and it is heavier than ordinary red brick. the volume ratio is shrinking with change of temperature to crack and strength of brick with brick walls down enough for new

Q:Can refractory bricks be used when it cracks for 1cm: 3, If the crack is caused by burning or drying, then it can't be used. While if the carck is caused by refractory brick molding, it still can be used. 4, the crack is caused by refractory bricks raw materials.

Q:How to prevent the refractory bricks from burning to crack?: There is just allowed a little moisture contained in adobe.

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