Definitions
Energy intensity of metallurgical alumina production is energy consumed within the plant perimeter by bauxite refining processes (including calcination) and by those auxiliary operations on site which are directly connected with the total production process per tonne of alumina produced. It comprises the energy used by plants which produce an average of 90% or more of their total output as metallurgical grade alumina, and the energy associated with the production of metallurgical alumina at other plants where it is possible to allocate energy consumption. Plants producing metallurgical alumina from nepheline ores or other non-bauxitic sources (e.g.fly ash), which globally contribute less than 1% of production, are excluded due to processual and by-product differences and thus incomparability of energy intensities.
Data Use
The data presented here is not suitable for life cycle assessment (LCA) purposes, rather data from the IAI life cycle inventory (LCI) reports or from alternative sources, such as regional aluminium assocaitions or life cycle data providers should be used.
Source of Data
The data included in this IAI Statistical Report have been derived from voluntary reports of IAI Member and non-Member companies. Sources outside the industry or estimates are used for “World” and “China” regions only.
Data Aggregation
The IAI Statistical System is designed to meet the requirement that, in general, individual company data be included only within appropriately aggregated totals by declared geographical areas and not be reported separately. The declared geographical areas and the primary aluminium producing countries which fall in those areas are detailed above.
One asterisk * indicates that the number is revised from previous publication. Two asterisks ** indicates that smelter energy intensity data were not reported to the IAI by the company or companies producing primary aluminium solely within that country; these constitute the estimated part of the “World” average, where data is available. Dates given against a country indicate that data were reported or not reported, as appropriate, for the limited period shown.
Data Integrity
The IAI considers the figures shown to be reliable, but they may be subject to revision.