Bauxite

Ko te Bauxite (bauxite ore) e pa ana ki te kupu whakakotahi mo nga kohuke ka taea te whakamahi i roto i te umanga, ko te nuinga o te tito o te gibbsite, te boehmite, te diaspore ranei.

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Whakaahuatanga

Ko te Bauxite (bauxite ore) e pa ana ki te kupu whakakotahi mo nga kohuke ka taea te whakamahi i roto i te umanga, ko te nuinga o te tito o te gibbsite, te boehmite, te diaspore ranei. He rauemi kore whakahou. Ko te bauxite parakore he ma te tae ka puta he hina hina, he kakariki marama, he whero marama ranei na te rereke o nga poke. Ko te Bauxite he maha nga waahanga ahumahi. I tetahi taha, ko te rauemi mata matua mo te whakaputa alumina, ka puta ko te konumohe. I tetahi atu taha, ka whakamahia nuitia hei rauemi mata i roto i nga umanga penei i nga rawa whakaahuru, corundum fused, rauemi huri, hua uku, hua matū, me te slurry alumina teitei.

Calcined bauxite contains hydrated alumina and aluminum hydroxide, obtained by calcining high-quality bauxite at high temperatures (85°C to 1600°C) in a rotary kiln. It is one of the main raw materials for producing aluminum. Compared with the original bauxite, after removing moisture through calcination, the alumina content of the calcined bauxite can be increased from about 57% to 58% of the original bauxite to 84% to 88%.

Tohu Hua

Bauxite	Rahi(mm)	Al2O3(%)	SiO2(%)	Teitei(%)	Fe2O3(%)	MC(%)
88	0-1,1-3,3-5	＞88	<9	<0.2	<3	<2
85	0-1,1-3,3-5	＞85	<7	<0.2	<2.5	<2

Nga tono

Te ahumahi konumohe: he nui te ihirangi konumohe o te bauxite, he mea tino nui mo te ahumahi whakarewa konumohe;
2. Te whakarewanga tika: ka taea te hanga i te bauxite ki nga momo momo whakarewa i muri i te tukatuka, te nuinga o te whakamahi i roto i te whakawhitiwhiti korero, te taputapu, te miihini me nga ahumahi taputapu;
3. Rauemi whakaahuru: he pai nga ahuatanga o te bauxite penei i te iti o te whakawhänui i te waiariki, te kaha o te whakakorikori, me te pumau o te reo o te pāmahana, ka waiho hei rauemi mata noa mo nga rawa whakaahuru. Ko nga mea whakaahuru i hangaia mai i taua mea ka whakamahia i roto i te rino, te whakarewa kore-ferrous, te hinu, te matū me etahi atu mara ahumahi.
4. Nga mea hanga whare: ka taea e te paura bauxite te whakapai ake i te kaha me te pakeke o nga taonga penei i te ciment, te moata, me te raima, me te whakarei ake i to ratau roa me te aukati i te waikura.