ISO 14404-3:2024 鉄鋼生産に伴う二酸化炭素排出原単位の算出方法 第3部:電気炉（EAF）および石炭系またはガス系直接還元鉄（DRI）設備を備えた製鉄所 | ページ 6

3.1.1

発生源

鉄鋼製品の製造過程で_CO2が排出される

注記 1: CO ₂排出源には、直接、上流、クレジットという 3 つのカテゴリーがあります。この文書の対象となる排出源の例は、3.1.2, 3.1.3, および 3.1.4 に示されています。

3.1.2

_CO2の直接排出

境界内の鉄鋼生産活動からのco ₂排出量

注記 1: CO ₂の直接排出は、ISO 14064-1 では「直接 GHG 排出」に分類されます。

3.1.3

上流のCO ₂排出量

敷地境界外での外部委託鉄鋼生産活動に関連する輸入材料、および敷地境界内への電気および蒸気の輸入からのco ₂排出量

注記 1:今期の輸入材料からのco ₂排出量は、ISO 14064-1 では「その他の間接的な GHG 排出量」に分類されます。

注記 2:今期の輸入電力および蒸気からのco ₂排出量は、ISO 14064-1 では「エネルギー間接 GHG 排出量」に分類されます。

3.1.4

_CO2排出量のクレジット

輸出された原料と電気または蒸気に相当するco 排出_量

注記 1:クレジット CO ₂排出量は、ISO 14064-1 では「直接 GHG 排出量」として分類されています。

3.2.1

natural gas

mixture of gaseous hydrocarbons, primarily methane, naturally occurring on earth, and used in metallurgic plants either as a fuel or as raw material

3.2.2

town gas

fuel gas manufactured for domestic and industrial use

3.3.1

heavy oil

No. 4 and No. 6 fuel oil defined by the American Society for Testing and Materials (ASTM)

Note 1 to entry: For No.4 and No.6 fuel oil, see ASTM Fuel Oils Standard Specification.

3.3.2

light oil

No. 2 to No. 3 fuel oil defined by the American Society for Testing and Materials (ASTM)

Note 1 to entry: For No.2 and No.3 fuel oil, see ASTM Fuel Oils Standard Specification.

3.3.3

kerosene

light petroleum distillate that has maximum distillation temperature of 204 °C and a final boiling point of 300 °C

Note 1 to entry: Also known as paraffin (oil).

Note 2 to entry: U.S. Energy Information Administration, Petroleum and other liquids, units are modified.

3.3.4

liquefied natural gas

LNG

butaneliquids composed predominantly of methane

[SOURCE:ISO 6578:2017, 3.1.4]

3.3.5

liquified petroleum gas

LPG

liquid composed predominantly of any of the following hydrocarbons or mixtures thereof: propane, propene, butanes and butene

[SOURCE:ISO 6578:2017. 3.1.4.]

3.4.1

EAF coal

solid fuel used for an electric arc furnace EAF (3.10.4) , including anthracite

Note 1 to entry: Coal can be either fossil coal derived from geological> deposits or biocoal derived from biomass.

3.4.2

steam coal

boiler coal for producing electricity and steam, including anthracite

Note 1 to entry: Coal can be either fossil coal derived from geological> deposits or biocoal derived from biomass.

3.4.3

coke

solid carbonaceous material

3.4.4

charcoal

devolatilized or coked carbon neutral materials

3.4.5

SR/DRI coal

solid fuel used for smelting reduction (SR)/direct reduction iron (DRI), including anthracite

Note 1 to entry: Coal can be either fossil coal derived from geological> deposits or biocoal derived from biomass.

3.5.1

limestone

calcium carbonate, CaCO₃mineral used in metallurgic plants as slag former or as raw material for burnt lime (3.5.2)

3.5.2

burnt lime

calcium oxide

CaO

limestone (3.5.1) calcinated in blast furnaces or in lime kiln

Note 1 to entry: Usually used as slag former.

3.5.3

crude dolomite

calcium magnesium carbonate

CaMg(CO3)2

mineral used in metallurgic plants as raw material for burnt dolomite (3.5.4)

3.5.4

burnt dolomite

CaMgO2

crude dolomite (3.5.3) calcinated in lime kilns

Note 1 to entry: Usually used as slag former.

3.5.5

electric arc furnace graphite electrodes

EAF graphite electrodes

net use of EAF graphite electrodes or attrition loss

3.5.6

nitrogen

N₂

inert gas separated from air at an oxygen plant, imported from outside the boundary or exported to outside the boundary

3.5.7

argon

ar

inert gas separated from air at an oxygen plant, imported from outside the boundary or exported to outside the boundary

3.5.8

oxygen

O₂

gas separated from air at an oxygen plant, imported from outside the boundary or exported to outside the boundary

3.6.1

electricity

electrical power imported from outside the boundary or exported to outside the boundary

3.6.2

steam

pressurized water vapour imported from/exported to outside the boundary

3.6.3

waste heat

any heat that can be collected economically and re-used for low grade heating or even low pressure steam generation for social heating or process heating or cleaning, within the industry or other industries

3.7.1

pellets

agglomerated spherical iron ore calcinated by rotary kiln or other equipment

3.7.2

pig iron

hot metal, intermediate liquid iron products produced by smelting iron ore with equipment such as blast furnace.

Note 1 to entry: Many companies report emissions from purchased pig iron in solid state as metallic charge under this product category, for this specific process route.

Note 2 to entry: According to International Iron Metals Association, (IIMA) on average, pig iron makes up between 5-10 percent of the global EAF metallics charge. In some parts of the world where scrap is scarce, pig iron can be used at up to 60 percent of the charge.

3.7.3

cold iron

solidified hot metal as an intermediate solid iron product

3.7.4

scrap

used steel available for reprocessing

3.7.5

gas-based DRI

direct reduced iron (DRI) using natural gas as fuel and reduction agent.

3.7.6

coal-based DRI

direct reduced iron (DRI) using coal as fuel and reduction agent

3.8.1

ferro-nickel

alloy of iron and nickel

3.8.2

ferro-chromium

alloy of iron and chromium

3.8.3

ferro-molybdenum

alloy of iron and molybdenum

3.8.4

ferro-manganese

alloy of iron and manganese

3.8.5

ferro-silicon

alloy of iron and silicon

3.8.6

silico-mangenese

alloy of silicon and manganese

3.9.1

crude steel

steel in its first solid (or usable) form

Note 1 to entry: Crude steel is the normalization unit for this calculation methodology.

Note 2 to entry: Crude steel examples are ingots and semi-finished products (billets, blooms, slabs) defined by Steel Statistical Yearbook.

3.9.2

co₂ for external use

co₂ exported to outside the boundary

3.10.1

other emission source

other related emission sources (3.1.1) such as plastics, scraps, desulfurization additives, alloys, fluxes for secondary metallurgy, dust, sludges, etc., that can be used if not covered by any other specific source

3.10.2

boundary

limit of activity used to calculate CO₂ emissions intensity for steel production activities

Note 1 to entry: Boundary may be different from site boundary.

Note 2 to entry: Major facilities in iron and steel production in boundaries are given in 3.10.4 to 3.10.13.

3.10.3

site boundary

boundary defined by the target steel production site for the calculation of CO₂ emission and intensity

3.10.4

EAF

electric arc furnace

furnace that melts and refines iron-bearing material into steel

Note 1 to entry: It can include ladle furnace; degassing; alloying station, as minor related emission sources. It should not be assimilated to an EAF steel plant defined as a comprehensive production unit.

3.10.5

casting

pouring steel directly from a ladle through a tundish into a mould shaped to form billets, blooms or slabs, or pouring steel from a ladle into a mould shaped to form ingots

3.10.6

lime kiln

kiln used to produce burnt lime (3.5.2) by calcination of limestone (3.5.1)

3.10.7

oxygen plant

cryogenic air separator to produce high-purity oxygen or other alternative technologies, such as hydrogen electrolysis plants

3.10.8

steam boiler

device to generate pressurized water vapour from heat

3.10.9

power plant

plant that generates electricity

3.10.10

hot rolling

rolling at temperatures above the recrystallisation temperature, normally above 500 °C

3.10.11

cold rolling

rolling at temperatures below the recrystallisation temperature, normally below 500 °C

3.10.12

coating

applying a protective layer to steel using various methods, such as galvanising, among others

Note 1 to entry: Coating materials may include tin, chrome, zinc, and other non-metallic materials, such as paints, etc.

3.10.13

iron ore agglomeration facility

plant for agglomeration and thermal treatment to convert the raw fine iron ore into spherical pellets with characteristics appropriate for use in a DRI production facility