1. Fa'unga 'o e naunau mo e 'ulungaanga fakafa'unga .
1.1 Alumina 'a e kakano mo e sio'ata 'o e konga 'o e tupulaki .
( Ngaahi Piliki ʻAlumina)
Alumina lining blocks are thick, crafted refractory ceramics mainly composed of aluminum oxide (Al two O SIX), with content typically varying from 50% ke 'olunga 99%, directly influencing their efficiency in high-temperature applications.
The mechanical strength, fakafepaki ki he corrosion, and refractoriness of these bricks enhance with higher alumina focus as a result of the advancement of a durable microstructure dominated by the thermodynamically secure α-alumina (diamond) stage.
During manufacturing, precursor products such as calcined bauxite, integrated alumina, or artificial alumina hydrate go through high-temperature shooting (1400 ° C– 1700 ° C), advertising stage transformation from transitional alumina kinds (γ, δ) to α-Al Two O THREE, which displays phenomenal solidity (9 on the Mohs range) and melting factor (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 (
Ko e Kautaha Tekinolosia 'o e 'Alumina., Ltd tokanga ki he fakatotolo mo e fakalakalaka ., ngaohi mo e fakatau atu 'o e 'aluminiume oxide efuefu ., ngaahi koloa 'aluminiume 'okisaiti, 'aluminiume 'okisaiti 'o e ipu, mo e ngaahi me'a pehē., tauhi 'a e ngaahi me'a faka'ilekitulonika, selami, kemikale mo e ngaahi ngaue'anga kehe .. Talu mei hono fokotuʻu ʻi he 2012. 2005, kuo tukupa 'a e kautaha ke 'oatu 'a e kau kasitomaa 'a e ngaahi koloa mo e ngaahi ngaue lelei taha .. Kapau 'oku ke kumi ki he tu'unga ma'olunga . alumina al2o3., kataki 'o ongo'i tau'ataina ke fetu'utaki mai.
Tags: Ngaahi Piliki ʻAlumina, alumina, ʻalumina ʻokisaiti
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