Silica brick and 0 expand the distinction of silica brick

Silica brick, the quality mark of SiO2 not under 93 ％ , 0 expand to silica brick calls melt quartz the brick again or fight thermal shock silica brick. Anxious furnace has extremely low heat coefficient of expansion, admirable be able to bear or endure advanced characteristic of content of strength of urgent cold urgent hot sex, good high temperature structure, SiO2. Among the project of fast hot rehabilitate that this product can use extensively at all sorts of anxious furnace, this product does not produce crackle to flake when use phenomenon, be close to the low heat of 0 to expand function, after making Jiao Luxiu fills, use on the safe side for a long time.

　 of 　 of melt quartz brick 0 expand 　 of silica brick character 1. SiO2 content is more than 99% , fight erode, acid-proof sex is exceedingly good 　 2. Low Fe2O3 content is less than 0.1% , to goods (wait like vitreous fluid) 　 of free from contamination 3. Low flux index (Al2O3+2R2O) be less than 0.3% 　 　 4. Heat expands rate is adjacent Yu Ling, when repairing but need not obligate expands seam, the close sex 　 that increases build by laying bricks or stones to build system 5. Excellent thermal stability, the goods when heat is repaired won't produce scamper to crack, can fall in the high temperature circumstance of ceaseless furnace, undertake repairing exercise 　 directly 6. Repair (heat is repaired) hind, won't happen flake wait for a phenomenon, the loading bate temperature that uses silica brick of 　 of 　 of on the safe side for a long time is as high as L640-1680 ℃ , use bulk for a long time below high temperature to compare stability. But silica brick fights thermal shock sex to differ, fireproof degree not quite tall. The property of silica brick, include chemistry mineral composition, true density, bulk density, fireproof degree, sex of stability of bulk of loading bate temperature, high temperature, heatproof shake and the sex that fight broken bits, closely related a lot of element such as state of the property with raw material, brilliant change and workmanship.

　 of silica brick 　 although of silica brick fireproof spending is not very tall, but loading bate temperature is higher, strength of high temperature structure is great, and good in the stability when 600 ℃ above is used for a long time, of can counteractive acidity slag erode. Accordingly, basically use at build by laying bricks or stones to build vitreous frit kiln and Jiao Lu at present. Build partition of room of anxious furnace char with silica brick build by laying bricks or stones, have below high temperature good firm sex is amiable close sex, service life can amount to 10-15 year, if use proper, can amount to 25 years of above. Silica brick ever used as the liner brick of acidity converter. Vault of electric stove roof, reverberator, regenerator and sedimentary room past use silica brick build by laying bricks or stones extensively also to build, already was replaced by tall aluminous brick and magnalium brick gradually now. 0 expand what meaning is silica brick? With silica brick brick of quartz of melt of difference having what is had fight acid slag to erode performance. Higher high temperature intensity. Loading bate begins temperature 1670 ℃ of 1620 ～ . Use changeless form for a long time below high temperature. Thermal shock stability is low (hot exchange is 1~4 in water second) it is raw material with natural silica, adscititious and right amount mineralizer, in order to promote the quartz in base substrate quartz of translate into phosphor. In the classics below reducing atmosphere ℃ of 1350 ～ 14 30 is slow and firing. Heat to expand to the total volume that there is hundred 1.5~2.2 about when 1450 ℃ , this kind of remains expands can make cut seam join closely, make sure build by laying bricks or stones builds body to have good air-tightness and structural strength. Have service life to grow at the same time, reduce specific power consumption to wait for an advantage. 0 expand of silica brick expand to be almost 0, common silica brick can appear expand, two kinds price has a difference.