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The bauxite (red-brown solid) - aluminium oxide mixed with impurities-is extracted from the earth. The extracted aluminium oxide is then treated with alkali, to remove the impurities. This results in a white solid called aluminium oxide or alumina.
Uranium ore is extracted from the ground using common open-pit or sophisticated underground mining techniques. Once the ore is excavated, the uranium is extracted or separated from the rock using a chemical process.After extraction, the uranium is further processed and crushed into powder or yellowcake.ranium ore is extracted from the ground using common open-pit or sophisticated underground mining techniques. Once the ore is excavated, the uranium is extracted or separated from the rock using a chemical process.