Alcoa 2012 Annual Report Download - page 23

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Term Abbreviation Definition
Proven reserve That portion of a reserve, i. e. bauxite reserve, where the
physical and chemical characteristics and limits are known
with high confidence and to which various mining modifying
factors have been applied.
Reactive silica RxSiO2The amount of silica contained in the bauxite that is reactive
within the Bayer Process.
Reserve That portion of mineralized material, i.e. bauxite, that Alcoa
has determined to be economically feasible to mine and supply
to an alumina refinery.
Silica SiO2A compound of silicon and oxygen.
Total alumina content TAl2O3The total amount of alumina in bauxite. Not all of this alumina
is extractable or available in the Bayer Process.
Total available alumina TAA The total amount of alumina extractable from bauxite by the
Bayer Process. Commonly this term is used when there is a
hybrid or variant Bayer Process that will refine the bauxite.
Total silica TSiO2The total amount of silica contained in the bauxite.
Alumina Refining Facilities and Capacity
Alcoa is the world’s leading producer of alumina. Alcoa’s alumina refining facilities and its worldwide alumina
capacity are shown in the following table:
Alcoa Worldwide Alumina Refining Capacity
Country Facility
Owners
(% of Ownership)
Nameplate
Capacity1
(000 MTPY)
Alcoa
Consolidated
Capacity2
(000 MTPY)
Australia Kwinana AofA3(100%) 2,190 2,190
Pinjarra AofA (100%) 4,234 4,234
Wagerup AofA (100%) 2,555 2,555
Brazil Poços de Caldas Alumínio4(100%) 390 390
São Luís (Alumar) AWA Brasil3(39%)
Rio Tinto Alcan Inc.5(10%)
Alumínio (15%)
BHP Billiton5(36%) 3,500 1,890
Jamaica Jamalco Alcoa Minerals of Jamaica, L.L.C.3(55%)
Clarendon Alumina Production Ltd.6(45%) 1,478 841
Spain San Ciprián Alúmina Española, S.A.3(100%) 1,500 1,500
Suriname Suralco Suralco3(55%)
AMS7(45%) 2,20782,207
United States Point Comfort, TX AWA LLC3(100%) 2,30592,305
TOTAL 20,359 18,112
1Nameplate Capacity is an estimate based on design capacity and normal operating efficiencies and does not necessarily
represent maximum possible production.
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