Tall aluminous brick is acidity alkalescent still

Tall aluminous brick is acidity alkalescent still:

1, because high aluminous products is medium Al2O3 is tall, miscellaneous quality is little, the vitreous body that forms Yi Rong is little, loading bate temperature is so higher than argillaceous brick, tall aluminous brick, but because of Molaishi crystallization did not form meshwork, temperature of reason loading bate still does not have silica brick tall.

2, the Al2O3 in tall aluminous brick is more, adjacent at neuter and fireproof material, of can counteractive acid slag and basic slag erode, because contain SiO2 among them, the ability that fights basic slag so is some weaker than fighting the ability of acid slag. Tall aluminous brick and the manufacturing technology of many clinker clay brick are similar, different point depends on scale of the grog in burden taller, can be as high as 90 ～ 95% , clinker is in broken before need to classification choose and screening divide iron, firing temperature is higher

3, a kind tall aluminous brick is fireproof material, the bases of brick of this kind of one fireproof material is AL2O3. Be like Al2O3 content prep above 90% , call corundum brick. Because resource is different, each country standard agrees not completely also. For example European each country stipulates to expensive aluminous simple fireproof stuff Al2O3 content floor level is 42% . Be in China, normally by content of the Al2O3 in tall aluminous brick cent becomes third class: The content of ─ ─ Al2O3 such as Ⅰ > the content of ─ ─ Al2O3 such as 75%; Ⅱ is the content of ─ ─ Al2O3 such as 60~75%; Ⅲ to be 48~60% .

4, tall aluminous brick chemistry tends neuter, of can counteractive acid slag and basic slag erode, because contain SiO2 among them, the ability that fights basic slag so is some weaker than fighting the ability of acid slag. Fight thermal shock sex: The heatproof shake performance of tall aluminous brick is poor, the grain composition that adjusts pug is used in be being produced normally, improve grain tie.


Tall aluminous brick is characteristic

1, of tall aluminous brick fireproof degree: Its are fireproof degree pledging in siliceous aluminium is taller in fireproof material, fireproof as the addition of content of the Al2O3 in goods degree rise, general not under 1750? 1790 ℃ . If Al2O3 content is more than the corundum goods of 95% , its are fireproof degree can be as high as 1900~2000 ℃

2, the loading bate temperature of tall aluminous brick: Reduce along with the addition of the SiO2 in goods and metallic oxide content, general the loading bate temperature of tall aluminous brick is 1420? 1530 ℃ . And Al2O3 content is more than the corundum goods of 95% , of its loading bate is spent amount to 1600 ℃ above. Because high aluminous products is medium Al2O3 is tall, miscellaneous quality is little, the vitreous body that forms Yi Rong is little, loading bate temperature is so higher than argillaceous brick, but because of Molaishi crystallization did not form meshwork, temperature of reason loading bate still does not have silica brick tall.

3, the sex fighting broken bits of tall aluminous brick, because in goods Al2O3 is contained highest and show neuter, reason all has to acidity or alkalescent slag stronger fight erode ability. The Al2O3 in tall aluminous brick is more, adjacent at neuter and fireproof material, of can counteractive acid slag and basic slag erode, because contain SiO2 among them, the ability that fights basic slag so is some weaker than fighting the ability of acid slag

4, the heatproof shake sex of tall aluminous brick, there are corundum and Molaishi in its goods two kinds of crystal are concomitant, and the linear expansion coefficient of corundum relatively linear expansion coefficient of Molaishi is big, because difference expands inside goods,reason is in when temperature change and bring about stress concentration, the heatproof shake sex of tall aluminous brick is so poorer, - kind water-cooling frequency has 3~5 only second.

5, the heavy change burning a line of tall aluminous brick, want a foundation of goods firing degree and calm, if firing temperature is enough, firing time is enough, criterion volume is steady, the heavy change that burn a line is little. Conversely, because goods interior produces recrystallization, can bring about generation remains to contract. Brick of tall aluminium of man of ancient bronze mirror has afore-mentioned characteristics, it basically is used at build by laying bricks or stones to build Jiao Lu firebox furnace head and place of first class of furnace of char room bottom, but unfavorable use as brick of char room metope, because be below high temperature,meeting generation coils edge, become warped horn.