Tall aluminous brick from 3 oxidation 2 aluminium (Al2O3) water content cent is following a few kinds:
Corundum brick: Prep above of aluminous water content 90 ％ ;
Fancy tall aluminous brick: Prep above of aluminous water content 85 ％ ;
Brick of one class tall aluminium: Prep above of aluminous water content 75 ％ ;
Brick of 2 class tall aluminium: Prep above of aluminous water content 65 ％ ;
Brick of 3 class tall aluminium: Prep above of aluminous water content 55 ％ .
The high density with tall, opposite big density spends compressive strength of experiment of this kind of compression model fancy tall aluminous brick. of fire of this kind of tall aluminous brick is spent with tall aluminous brick is normally similar, waste time can be little, low cost, the operating period on kiln furnace is general of the application that tall aluminium makes corundum brick and relevant firebrick 2 times. It wants to be stone with the grog of fancy and aluminous cement of mechanical calcination (one 3.smm) of 1.smm of particle size distribution, suttle than: 40%~45% , add pink of aluminous cement grog and fine pink makings: 45% one 51% , soft clay: 7% one 10% , grain cyanite pink: 3One 5% , reach waste water of paddle of paper of its bind agent 4% one 5% etc form. Grog of cement of the alumina when making must sift pink via smashing, grain expects mill of mutual mix up, of the at brick of corundum of 1440~1460 ℃ fire application after the classics condiment, glue that mix refine, figuration, dry impetuous and relevant firebrick piece.
High density fancy tall aluminous brick and normally general the characteristic difference key of tall aluminous brick is in with following a few levels:
The high density of ① raw material spends a gender
Fancy the raw material that place of tall aluminous brick uses is the grog of fancy and aluminous cement that chooses mechanical calcination be in for water content of stone AL2O3 component 85% the left and right sides, opposite density exceeds 2.8g/cm³ , and normally AL2O3 meets the raw material that normally tall aluminous brick uses main use 75% fluctuation are in relative to density 2.6 fluctuation, because these 2 kinds of raw material place are produced,making manufacturing commodity difference is quite big.
② is fireproof degree tall
Fireproof spending is value of this compulsive index in commodity of tall aluminous brick, of the application of brick of this kind of every corundum and relevant firebrick is to have fireproof spent index worth, can be the difficult problem as a result of efficiency sex, extensive and fireproof spend limit the difference on material to go division into districts, for example of clay brick fireproof degree setting in national level is prep above 1700 ℃ can, and of tall aluminous brick fireproof spending is prep above 1750 ℃ can. Can be specific commodity is fireproof the mark cost that the cost that spend mark must pass national level high to set, normally of the tall aluminous brick of main use fireproof degree fancy in 1780 ℃ of tall aluminous brick fireproof degree be in 1820 ℃ .
The dependability of ③ Mo Laishi photograph
Key is by Molaishi, sandwich glass photograph and fireproof photograph are formed related the crystal that makes handicraft from height aluminium. Water content of little imagine Al2O3 is higher, fireproof photograph is occupied bigger than jumping over.
Tall aluminous brick is comprised by Molaishi and sandwich glass, subsequently the promotion of Al2O3 water content, water content promotes the Molaishi in tall aluminous brick, sandwich glass photograph is reduced, together, crystal of Mo Laishi of You Changzhu shape produces solid network framework to be helpful for promoting the load molten of handicraft to spend in the brick. The 4th paragraph fancy Al2O3 of tall aluminous brick rub Er quality 85 ％ of 80 ％ ～ . In these the load molten of handicraft spends the harm that suffers Al2O3 water content small. Most first, increase along with AL2O3, fireproof photograph increases in microstructure, mo Laishi is reduced, at this moment, mo Laishi crystal can not produce detailed network framework and acting with the fireproof Molaishi with loose relativity framework pursues. Together, along with the promotion of Al2O3, the SiO2 water content that sandwich glass takes a fancy to is reduced, viscosity of concentrated juice photograph is reduced. Along with the promotion of AL2O3 water content, produce fireproof framework picture, be beneficial to of promotion load molten to spend. This kind of element is caused here in limits of one Al2O3 water content, fancy the load molten of tall aluminous brick spends the harm that suffers Al2O3 water content not quite. But, when AL2O3 rub after Er quality crosses 90 ％ high, because of a lot of fireproof put have and produce firm framework to pursue, an Al2O3 rub the handicraft average that Er quality exceeds 90 ％ sees tall purity raw material, residual water content is low, quantity of sandwich glass photograph is little. Accordingly, along with Al2O3 rub the promotion of Er quality, molten spends its load to lift quickly.
In other words, promotion raw material is pure degree, change help advance somebody's career the organic chemistry of matrix is mineral form, reduce number of sandwich glass photograph, adjust component of sandwich glass photograph, it is promotion fancy what dependability of the compressive strength of tall construction of tall aluminous brick, thermal shock reachs the sex that fight broken bits is important.
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