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1998年美国从 12个国家进口 110 0万ｔ铝土矿。大部分是从牙买加 (37% )、几内亚 (35 % )、巴西 (16 % )和圭亚耶 (9% )进口的 ,价格～ 2 9美元 /ｔ。美国 5个工厂用拜耳流程生产氧化铝 ,设计产能 6 15万ｔ/ａ ,年产量 5 5 0万ｔ。 1998年进口氧化铝 40 0万ｔ,进口价格为 2 47?
In 1998, the United States imported 11,000 tons of bauxite from 12 countries. Most are imported from Jamaica (37%), Guinea (35%), Brazil (16%) and Guyay (9%) at a price of ~ $ 29 / t. The five plants in the United States use Bayer process to produce alumina with a designed capacity of 615,000 t / a and an annual output of 550 million t. In 1998, 4.0 million tons of alumina were imported and the import price was 2 47?