Almost manufacturer of every tall aluminous firebrick has corresponding pull current Cheng, recipe craft decided the weight of the product, if weigh qualitative brick to need ambitious force to squelch for many times,shape, more compact, intensity is high, wearability is good, the brick that light qualitative tall aluminous brick produces according to recipe craft is lighter, have good heat preservation performance.
Of firebrick of tall aluminium of technology of production of tall aluminous firebrick and argillaceous brick shape and production methods is basic and identical. Just some craft parameter is different. Still have smash → mixes refine → to shape → dry → is firing → examines → is packed wait for craft. It is better that stress is pressed to bear below microtherm, but stress is pressed to be reduced somewhat when high temperature, to the limit of one's capacity of the caboodle inside kiln under 1 meter, silica brick can be as high as 1.7 meters. Tall aluminous firebrick and the manufacturing technology of many ripe clay brick are similar, its distinguish the scale of the grog in depending on burden to be able to be as high as 90%~9% . Clinker is in broken before need classifications sift jig choosing to divide iron. Tall aluminous firebrick in channel kiln firing temperature is 1500~1600 ℃ commonly. Production carries out a proof, tall aluminous grog is in broken before should choose strictly classification, classification store. Those who use aluminous grog and clay is collective fine grind a method, can improve product quality.
The choice of tall aluminous firebrick. Tall aluminous firebrick is one kind contains alumina the siliceous aluminous fireproof material of 48% above. It is by contain alumina aluminous or other contain alumina to taller raw material is burned into swaged forging and be become. Thermal stability is tall, fireproof sex prep above 1770 ℃ . The following small series will introduce the option of tall aluminous firebrick in detail, can understand.
Want to decide according to the particular case of your kiln above all. If be to build kiln, the data that can provide according to kiln supplier chooses guidance, the use place that knows tall aluminous firebrick, use temperature, special environment (soda acid, high pressure, concussion, wear away wait for) . ) , obtain choice guidance thereby; If be building of old kiln maintenance, can basis before use experience, union a few improve a proposal effectively, reach efficient tall aluminous brick chooses plan. Next, decide the scale of standard brick and special shaped brick. If be standard brick, buy more easily, can according to industry or national level; If be special shaped brick, need custom-built mould for the most part. The production of special shaped brick, include a pattern make accurate, it is the key that considers firebrick manufacturer actual strength.
, determine the balance between the price of tall aluminous firebrick and quality. Why so say? Clever you have the result certainly, quality decides to produce and produce value. The key that decides value of tall aluminous firebrick is workmanship and aluminous content. Aluminous content can consider with data, more intuitionistic. Basically the content that use aluminium measures the price of tall aluminous firebrick on the market. Buy aluminous content when the product with tall, low price, whether is wanting an attention false aluminous content. Workmanship basically is standard brick or special shaped brick, closely related the technology that whether has special requirement and manufacturer and quality management system, this also is the cost dominant position with the largest than agency manufacturer. Tall aluminous firebrick serves as the important material that makes sure kiln furnace is produced smoothly, if the product function of the choice does not amount to mark, may the loss outweights the gain. Current, as a result of the aggravate that the industry competes, the price of tall aluminous firebrick is in fireproof data industry is relatively transparent, the principle of material price and value = quality. ;
Fire one class, 2 class, when waiting for tall aluminous firebrick, general fire temperature is 1430~1450 ℃ , heat preservation 40h. Fire when firebrick of 3 class tall aluminium, fire temperature is 1390-1400 ℃ , heat preservation hour of 24 hours of ~32. If use channel kiln fire one class and firebrick of 2 class tall aluminium, fire temperature is 1500~1560 ℃ normally. Warm up speed because of raw material and product different. In the microtherm phase before 600 ℃ , should slow warm up: 6Of 00~1200 ℃ warm up is speed OK a little a bit faster: ? ?200 ℃ should be controlled to highest fire temperature warm up speed. Cooling phase also wants control to drop in temperature speed. Tall aluminous fireproof brickkiln (or kiln car) general paper-cover. To avoid firing when generation black heart, OK also side outfit. Tall aluminous brick includes blast furnace brick of brick of tall aluminous brick, hot-blast stove tall aluminium, smelting furnace tall aluminium, get together light tall aluminous brick, fight flake tall aluminous brick, electric stove carries brick of tall aluminous brick, light qualitative tall aluminium, low creep on the head tall aluminous firebrick, abnormity is tall. Tall aluminous brick is made by high grade expensive aluminous stuff and clay, AL2O3 is contained 48% to of 75% not grade is fireproof product. Basically use at building housetop of blast furnace, hot-blast stove, electric stove, blast furnace, reverberator, rotate regenerator of kiln of kiln liner, glass rotates partly zephyr fire partition.
How to differentiate the quality of tall aluminous firebrick? How to differentiate the quality of tall aluminous firebrick? In the producer goods of tall aluminous firebrick, if the matter content such as Fe2O3, FeO, TiO2 is higher, add firing when had heated fast, namely the area after warm-up is taken and firing the temperature of the area before the belt and oxidation atmosphere are thicker, the rate that black heart of tall aluminous firebrick produces will be aggravating. Wait for above tall aluminous firebrick is firing temperature is higher, use oxidation atmosphere, be like AL2O3, content is more than be equal to the tall aluminous firebrick of 60% average and firing temperature is 1450 ℃ , use strong oxidation atmosphere, superfluous coefficient α is not less than air 1.15. Kiln of high temperature channel is firing tall aluminous firebrick, temperature of the area after warm-up is taken must achieve basic temperature to ask. To kiln of shorter high temperature channel (warm-up belt length spends opposite shorter) , in warm up in unit process of cargo bandling, have a bit undeserved, can bring about had warmed up fast, make firing the amount of oil gun fuel injection of the area before the belt is large, blaze is simple and honest. After the circular agitate air curtain of the area after warm-up is taken, the temperature that can use air curtain hind becomes clear, temperature is elevatory, then warm-up takes fundamental temperature to be able to rise significantly. Here high temperature falls and the reducing atmosphere condition that form falls, the Fe2O3 〔 in adobe is pink) should decompose FeO 〔 black Brown) . Fe2O3 (pink) + CO issues → 2FeO in temperature of ℃ of 1000 ℃ ~1100 (black Brown) + tall aluminous firebrick produces CO2 ↑ " black heart " hind, its are fireproof degree of lower than normal goods 10~20 ℃ , apparent pore leads taller than normal goods 1~3% , intensity of normal temperature compression compares normal goods low 10MPa to control, KD) of 〔 of loading bate temperature compares ℃ of normal goods low 40~70, goods over all dimension changes in use process big. Goods brittleness is big, fight namely lose property low, rupture easily. Can you conclude from this a: ? does dysentery hold ┑ of attentively copy fraud high to make brigade benzyl circle does farsighted hold the post of discuss ㄐ round Sui is narrow one's eyes of A Chinese-style unlined garment of neon of busy of 8 Nao twin read exemplary does prize of fade of farsighted book carry does dysentery hold V of of an ancient term for silk fabrics of locust of fear of of Ч of narrow one's eyes of A Chinese-style unlined garment of neon of ┑ of attentively copy fraud high to defeat extensive deceive?
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