1. Qaab-dhismeedka Maaddada iyo Sifada Dhismaha
1.1 Waxyaabaha Alumina ah iyo Kobcinta Wajiga Crystal
( Biraha Dahaarka Alumina)
Qaybaha dahaarka aluminiumku waa qaro weyn yihiin, dhoobada refractory ee la sameeyay oo inta badan ka kooban aluminium oksaydh (Al laba O SIX), oo leh nuxur caadi ahaan ka duwan 50% in la dhaafo 99%, si toos ah u saameeya waxtarkooda codsiyada heerkulka sare.
Xoogga farsamada, iska caabin daxalka, Dib-u-soo-celinta lebenkan waxay kor u qaadaysaa diiradda aluminiumka sare taas oo ka dhalatay horumarinta qaab-dhismeed yar oo waara oo ay maamusho α-alumina heerkul ahaan sugan (dheeman) marxaladda.
Inta lagu jiro wax soo saarka, alaabta hore sida bauxite calcined, aluminium isku dhafan, ama alumina hydrate macmal ah waxay maraan toogasho heerkul sare ah (1400 ° C– 1700 ° C), isbeddelka marxaladda xayeysiinta ee noocyada aluminium ee ku-meel-gaarka ah (c, d) ilaa α-Al Laba O SADEX, kaas oo muujiya adkeysiga ifafaale (9 oo ku yaala xadka Mohs) iyo arrin dhalaalaysa (2054 ° C).
The resulting polycrystalline structure contains interlocking corundum grains embedded in a siliceous or aluminosilicate glassy matrix, the make-up and quantity of which are thoroughly regulated to balance thermal shock resistance and chemical toughness.
Small ingredients such as silica (SiO ₂), titania (TiO ₂), or zirconia (ZrO ₂) may be introduced to change sintering habits, boost densification, or enhance resistance to certain slags and fluxes.
1.2 Microstructure, Porosity, and Mechanical Integrity
The efficiency of alumina lining blocks is seriously dependent on their microstructure, especially grain size distribution, pore morphology, and bonding phase attributes.
Optimum bricks display great, consistently distributed pores (closed porosity chosen) and very little open porosity (
Shirkadda Alumina Technology Co., Ltd., Ltd diiradda saaray cilmi-baarista iyo horumarinta, wax soo saarka iyo iibinta budada oxide aluminium, aluminium oxide alaabta, aluminium oxide crucible, iwm., u adeegida qalabka elegtarooniga ah, dhoobada, kiimikaad iyo warshado kale. Tan iyo markii la aasaasay 2005, shirkadu waxa ay ka go’an tahay in ay macaamiisha u soo bandhigto wax soo saarka iyo adeegyada ugu wanaagsan. Haddii aad raadinayso tayo sare leh aluminium al2o3, fadlan xor u noqo inaad nala soo xidhiidho.
Tags: Biraha Dahaarka Alumina, aluminium, aluminium oxide
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