How aluminum is made - material, manufacture, making, used .
The Bayer process for refining aluminum ore, developed in 1888 by an Austrian . was produced in the United States, and it sold for about the same unit price as silver. In 1995, U.S. plants produced 7.8 billion lb (3.6 million metric tons) of . Bauxite consists of 45-60% aluminum oxide, along with various impurities such as.