Alumina bunni ah oo la isku daray waxaa laga sameeyay bauxite tayo sare leh oo ah walxo cayriin ah, anthracite iyo bir. Waxaa lagu sameeyaa dhalaalid arc ah heerkul ah 2000°C ama heerkul ka sarreeya. Waxaa la burburiyaa oo balaastig lagu shubaa mashiin iskiis u shiidaya, si bir ah ayaa loo xushay si looga saaro birta, waxaana lagu shaandheeyaa cabbirro kala duwan, qaabkeeduna waa mid cufan oo adag.
Sifooyinka Kiimikada iyo Fiisikiska | ||||||
| Alaabta | Al2O3 | Fe2O3 | SiO2 | Cufnaanta badan | Midab | Codsiga |
| Darajada 1aad | ≥95 | ≤0.3 | ≤1.5 | 3.85 | Maroon | Maaddooyin aan fiicnayn, |
| Fasalka II | ≥95 | ≤0.3 | ≤1.5 | 3.85 | Walax madow | dhalaalin fiican |
| Fasalka III | ≥95 | ≤0.3 | ≤1.5 | 3.85 | Budada cawlan | Nadiifinta, shiididda |
| Fasalka IV | ≥95 | ≤0.3 | ≤1.5 | 3.85 | Walax madow | Shiidi, jarid, iyo burburinta ciidda |
| Fasalka V | ≥95 | ≤0.3 | ≤1.5 | 3.85 | Budada cawlan | Nadiifinta, shiididda |
1. Alumina bunni ah oo la isku daray ayaa ku habboon sameynta qalabka xoqidda dhoobada iyo resin-ka, oo loo isticmaalo shiidida biraha xoogga leh ee la riixi karo, sida birta kaarboonka, birta daawaha ee ujeeddada guud, birta la shubi karo ee la dahaadhi karo iyo naxaasta adag iwm.
2. Waxaa si weyn loogu isticmaalaa diyaarinta dusha sare sida xoqidda, nadiifinta, shiididda, nadiifinta biraha kala duwan, galaaska, caagga, iyo warshadaha caaryada.
3. Waxa kale oo loo isticmaali karaa sidii walxo aan la isku hallayn karin.
Haddii aad qabtid wax su'aalo ah. Fadlan xor u noqo inaad nala soo xiriirto.