Production of light qualitative tall aluminous adiabatic firebrick and use

Tall aluminous qualitative adiabatic firebrick basically is content pointing to aluminium in 48% above refractory products, because have bulk density small, quality is light, adiabatic the effect is good wait for an advantage, also call brick of tall aluminium of light qualitative tall aluminous brick or adiabatic heat preservation. It is the firebrick of a kind of heat preservation with furnace of kiln of high temperature industry and hot project commonly used facilities.

 

Because use place to differ, the use temperature of the use temperature of tall aluminous qualitative adiabatic firebrick and heavy qualitative tall aluminous firebrick is different. Heavy qualitative firebrick can contact solution directly or slaggy, porosity is low, impervious appears a gender strong; Light qualitative tall aluminous firebrick cannot be contacted slaggy, porosity is taller (66%-73% ) , slaggy cause to bricky system interior through stomatic infiltration destroy.

Light qualitative tall aluminous brick calls tall aluminium adiabatic firebrick again, it is the Al2O3 content that controls for main raw material with aluminous alumina do not be less than the products of adiabatic and fireproof data of 48% , a kind be light qualitative firebrick. Normally cent is light qualitative tall aluminous brick two kinds: One kind is what make for main raw material with natural aluminous aluminous grog is common light qualitative tall aluminous brick, another kind is what make for main raw material with electric frit or agglomeration alumina is high grade light qualitative tall aluminous brick, because of its advocate brilliant photograph is corundum, call light qualitative corundum the brick again. Common light qualitative tall aluminous brick is according to density cent: 1.2, 1, 0.8, 0.6 wait.

 

One, light qualitative tall aluminous brick is characteristic

 

1, thermal shock stability is good.

 

2, bulk density is small, effect of heat preservation heat insolation is good.

 

3, high temperature capability is stable.

 

4, energy-saving effect is good.

 

2, utility of light qualitative tall aluminous brick: Basically use at build by laying bricks or stones to build thermal insulation and erode without stock of melt of intense high temperature reach erode the place of action, use temperature is in material of liner of the furnace of heating furnace cooking between 1500 ℃ of 1000 ～ and facilities of other hot project, heat treatment, if be contacted with melt content, the surface contacts temperature cannot prep above 1350 ℃ .

 

3, brick of tall aluminium of light qualitative heat insolation makes a process

 

Light qualitative tall aluminous brick uses tall aluminous aluminous grog to be main raw material commonly, add a few clay and bond, according to certain proportional deserve to compare, via mixing refine hind uses bubble method or aeriform happening law is opposite with slop form light qualitative tall aluminous slop undertakes pouring, shape, the drawing of patterns after classics is dry is become by high temperature fire.

 

The important segment in pledging tall aluminous brick makes a process gently is burden and epispastic, want what good according to the design prescription controls raw material to deserve to compare above all, want to notice epispastic technology in epispastic process next, make epispastic stoma even, the use after facilitating light qualitative tall aluminous brick is made.

 

How much is the use temperature of tall aluminous qualitative adiabatic firebrick? The basis produces industrial characteristic, use different capable person to pledge, use temperature is different, if use light qualitative tall aluminous aluminous grog to be what main material makes,call common light qualitative tall aluminous brick; It is what main material makes to call brick of light qualitative corundum with electric frit or agglomeration alumina, the use temperature with two kinds of different firebrick and characteristic are as follows:

 

Common light qualitative tall aluminous brick uses bubble law production. Use clay of tall aluminous grog, grey Gan to be raw material, clay of northeast china ash is agglomeration auxiliary, adscititious 3%~5% sawdust does a medicine to aid, make foaming agent with colophony black, preparation gives density to be more than the bubble slop of 1.05g/cm3, in infuse metal pattern, be the same as a model one case again dry, pouring blaze kiln next at 1300~1350 ℃ firing, heat preservation 4~6h. The ability after after giving pit, needing to use emery wheel treatment to wear level off look is used. Bulk density is in 0.4-1.35g/cm3, porosity is 66%-73% , compression intensity is 1.3-8.1MPa, thermal conductance is 0.291~-0.582W/(m·K) . Of light qualitative tall aluminous brick fireproof degree tall, heatproof shake sex is good, often use as the high temperature thermal insulation of kiln furnace. It is good that because pledge tall aluminous brick is in gently,reducing atmosphere issues chemical stability, make the kiln oven that protects atmosphere with the body of build by laying bricks or stones such as hydric, carbon monoxide consequently, use light qualitative tall aluminous brick to make adiabatic line commonly. Highest use temperature is 1350~1500 ℃ commonly.

 

Tall aluminous qualitative light qualitative firebrick

 

Brick of light qualitative corundum is to point to contain AL2O3 to be in 90% above, the small qualitative refractory products that basically comprises by corundum. It is with industry alumina is raw material, add a few bond and flux, use aeriform happening law and bubble method, classics figuration, dry, in 1350~1550 ℃ firing make, because this often calls alumina of bubble corundum brick, bubble brick. Commonly used product volume density is 0.8-~1.35g/cm3, compression intensity is 4~25MPa accordingly, thermal conductivity is low. Fireproof degree tall, thermal stability is good. Can use at heating up the thermal insulation of labor facilities, or the liner of hot project facilities of as immediate as blaze effect, but unfavorable with Yu Shourong broken bits is eroded directly place. Use below reducing atmosphere also have taller stability. Basically use at sufferring melt stock and erode the equipment liner that gas is eroded and erodes. Highest use temperature can amount to 1650 ℃ commonly, the products with high purity uses temperature to be able to amount to 1800 ℃ .

Manage changes target:

 

Project	Light qualitative tall aluminous brick
	1.2	1.0	0.8	0.6
℃ of highest use temperature	1350	1300	1250	1200
Al 2 O 3 , % ≥	48	48	48	48
Fe 2 O 3 , %≤	2	2	2	2
Bulk density, g/cm 3 ≤	1.2	1	0.8	0.6
Compression intensity, mpa ≥	5	4	3	2
Burn systole to be less than the temperature of 2% again, ℃ ≥	1400	1400	1400	1350
Fireproof degree, ℃ ≥	1710	1710	1670	1650
Coefficient of thermal conductivity, w/ (M·k) average temperature 350 ℃ ≤	0.5	0.35	0.35	0.3

4, production of light qualitative adiabatic brick

Light qualitative tall aluminous brick uses tall aluminous aluminous grog to be main raw material commonly, add a few clay and bond, according to certain proportional deserve to compare, via mixing refine hind uses bubble method or aeriform happening law is opposite with slop form light qualitative tall aluminous slop undertakes pouring, shape, the drawing of patterns after classics is dry is become by high temperature fire.

The important segment in pledging tall aluminous brick makes a process gently is burden and epispastic, want what good according to the design prescription controls raw material to deserve to compare above all, want to notice epispastic technology in epispastic process next, make epispastic stoma even, the use after facilitating light qualitative tall aluminous brick is made.

Light qualitative tall aluminous adiabatic firebrick is one of adiabatic and fireproof data that compare ideal at present, have compression strength tall, coefficient of thermal conductivity function of low, heat preservation good, price is low wait for a characteristic, apply extensively already at kiln of body of kiln of channel of pottery and porcelain, roller path kiln, shuttle type kiln, wall now, material of liner of heat of all sorts of heating furnace cooking that also are used at steely industry and facilities of other hot project, heat treatment, have wide market perspective.

Light qualitative tall aluminous brick calls light qualitative tall aluminium adiabatic firebrick again. Alumina content is in 48% above, main the light qualitative fireproof material that constitutes jointly by Molaishi and vitreous photograph or corundum. The light qualitative tall aluminium that flourish Cheng Naicai produces is adiabatic 0.4——1.35g/cm3 of firebrick bulk density. Porosity 66%——73% , compression intensity 1——8MPa. Heatproof shake performance is better. Use tall aluminous aluminous grog to add a few clay normally, law or bubble law produce with gas after classics mill with slop form pouring, figuration, classics 1300——1500 ℃ is firing. Also can replace partial alumina grog with industrial alumina sometimes. With the liner that builds kiln furnace at build by laying bricks or stones and thermal insulation, and erode without stock of melt of intense high temperature reach erode the place of action. When be being contacted with blaze directly, temperature of watch surface contact does not get prep above 1350 ℃ .

The firebrick of boarding lump heat insolation that pledges adiabatic firebrick fastens interior to have adiabatic property for poriferous structure gently, mix with the production of bricky form product among them application is most wide, reason calls light qualitative adiabatic firebrick again. Light qualitative adiabatic firebrick presses his to material pledges or make place undertake classify and naming with raw material normally. For example, pledge with clay, silicon and the light qualitative firebrick that waits for raw material to make character calls tall aluminium respectively brick of light qualitative clay, light qualitative silica brick and light qualitative tall aluminous brick. Listed below by made the raw material that light qualitative firebrick uses and composition list the sort of light qualitative adiabatic firebrick and characteristic.