1. System Boundaries
3.17 Unwrought aluminium
3.17.1 Special provisions
This aggregated goods category includes non-alloyed as well as alloyed aluminium, in physical form typical for unwrought metals, such as ingots, slabs, billets or granules. In integrated aluminium plants, liquid aluminium directly charged to the production of aluminium products is included, too.
3.17.2 System boundary
3.17.2.1 Primary (electrolytic) smelting
For that production route, direct emissions monitoring shall take into account:
– all processes directly or indirectly linked to the production processes emitting CO2 emissions from the consumption of electrodes or electrode pastes;
– all processes directly or indirectly linked to the production processes emitting CO2 emissions from any fuels used (e.g. for drying and pre-heating of raw materials, heating of electrolysis cells, heating required for casting);
– all processes directly or indirectly linked to the production processes emitting CO2 emissions from any flue gas treatment, from soda ash or limestone if relevant;
– perfluorocarbon emissions caused by anode effects monitored in accordance with Point B.7 of Annex II.
3.17.2.2 Secondary melting (recycling)
Secondary melting (recycling) of aluminium uses aluminium scrap as main input. However, where unwrought aluminium from other sources is added, it is treated like a precursor.
For that production route, direct emissions monitoring shall take into account:
– all processes directly or indirectly linked to the production processes emitting CO2 emissions from any fuels used for drying and pre-heating of raw materials, used in melting furnaces, in pre-treatment of scrap such as de-coating and de-oiling, and combustion of the related residues, and fuels required for casting of ingots, billets or slabs;
– all processes directly or indirectly linked to the production processes emitting CO2 emissions from any fuels used in associated activities such as treatment of skimmings and slag recovery;
– all processes directly or indirectly linked to the production processes emitting CO2 emissions from any flue gas treatment, from soda ash or limestone if relevant.
3.18 Aluminium products
3.18.1 Special provisions
None
3.18.2 System boundary
For aluminium products, direct emissions monitoring shall take into account:
– all processes directly or indirectly linked to the production processes emitting CO2 emissions from combustion of fuels and process emissions from flue gas treatment, excluding the following processes: cutting, welding and finishing of aluminium
products.
3.19 Electricity
3.19.1 Special provisions
The emission factor for electricity shall be determined in accordance with Point D.2 of Annex III.
3.19.2 System boundary
For electricity, direct emissions monitoring shall take into account:
– all processes directly or indirectly linked to the production processes emitting combustion emissions and process emissions from flue gas treatment.