Tall aluminous brick differs according to resource condition and product demand, can use the following kinds of raw material:
With hydrous aluminium oxygen is mineral (one water aluminous stone, 3 water aluminous stone)
The line of silicon of tall aluminous aluminous; that is main composition stone a group of things with common features is mineral (include stone of line of cyanite, andalusite, silicon to wait) ; synthesizes raw material artificially, wait like corundum of frit of Mo Laishi of industrial alumina, synthesis, report. Earth of vanadium of Chinese tall aluminium is resourceful, quality of a material is good, producing area basically distributings in and other places of Shanxi, Henan, Heibei, Guizhou, Shandong. Earth of produces tall aluminous vanadium, basically be one water aluminous stone (α-Al2O3·H2O) and kaolinite two kinds of mineral mixture.
The character of tall aluminous brick:
A, fireproof degree
Of tall aluminous brick fireproof degree mix than argillaceous brick of half silica brick fireproof degree want tall, amount to 1750~1790 ℃ , belong to advanced and fireproof material.
Temperature of bate of B, loading
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.
The C, sex that fight broken bits
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.
Of firebrick fireproof degree differ with melting point, the photograph of solid of fluid get along with that melting point is crystallization body is in the temperature when the balance. The composition of great majority firebrick is heterogeneous is not homogeneous materials. Without certain melting point, its begin occurrence fluid photograph to arrive to fuse completely is process of a gradual change, inside quite wide high temperature range, solid fluid photograph coexists, reason if desire of the bate that token firebrick issues in high temperature and melt special card, can with fireproof degree come magnanimity. Accordingly, fireproof spending is polyphase body achieves some the temperature of specific bate degree.
Fireproof index of a when although be evaluation firebrick,spend main technique, but the upper limit that cannot use temperature as firebrick. Tall aluminous brick is fireproof degree examine the standard is GB/T 7322 " tall aluminous brick is fireproof spend experiment method " . Of a few commonly used firebrick fireproof spend as follows:
1, argillaceous brick 1610-1750 ℃
2, silica brick 1690-1730 ℃
3, ℃ of crystallization silica 1730-1770
4, ℃ of horniness clay 1750-1770
5, tall aluminous brick ＞ 1770-2000 ℃
6, magnesian qualitative firebrick 2000 ℃ of ＞
7, dolomite firebrick 2000 ℃ of ＞
Tall aluminous firebrick, namely alumina content pledges in a kind of siliceous aluminium of 48% above fireproof material. By alumina or other alumina content taller raw material classics shapes to be become with to calcine. Thermal stability is tall, fireproof degree in 1770 ℃ above. The sex that fight broken bits is better. Tall aluminous brick is a kind of firebrick with the most extensive and most application. Accordingly, the discretion of price of tall aluminous brick affects the manufacturing cost of the enterprise directly.
Aluminous content is right Tall aluminous brick
Tall aluminous firebrick is important one of working property are the structural intensity below high temperature, this one character is out of shape with loading bate temperature comes normally assess. Also determine sex of creep of its high temperature will reflect strength of structure of its high temperature. Test result makes clear, loading bate temperature rises along with the addition of Al2O3 content. Home of tall aluminous brickyard according to 3 oxidation cent of content of 2 aluminous Al2O3 makes 3 order and degree: Ⅰ class - Al2O3 content > 75% ; Ⅱ class - Al2O3 content is 60 ～ 75% ; Ⅲ class - Al2O3 content is 48 ～ 60% , generally speaking, 3 grade differentiate tall aluminous brick for 3 prices a flight of stairs.
Content of alumina of tall aluminous brick is in 48% above are to belong to data of neuter firebrick manufacturer. By alumina or other alumina content taller raw material classics shapes to be become with to calcine. Thermal stability is tall, firebrick manufacturer is spent in 1770 ℃ above. The sex that fight broken bits is better, the liner that is used at build by laying bricks or stones to build furnace of circumgyrate of forge of steel-making electric stove, glass, cement to wait. This product has decrescent of high temperature squirm, fight aggressivity stability of strong, thermal shock is good wait for an advantage, apply to big, medium-sized hot-blast stove.
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, if the tall aluminous brick such as Ⅰ , Ⅱ uses channel,1500 ～ are commonly when kiln is firing 1600 ℃ .
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