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Process Data set: Granulated Blast Furnace Slag (en) en de

Tags Dieser Datensatz ist Bestandteil der ÖKOBAUDAT.
Key Data Set Information
Location RER
Reference year 2022
Name
Granulated Blast Furnace Slag
Use advice for data set Scope: The Life Cycle Assessment is based on data collected from the ArcelorMittal integrated plants producing blast furnace slag as a co-product of the steel manufacturing process, representing 100 % of the annual production from 2019. System boundary: Type of the EPD: cradle-to-gate. Module A1-A3 were considered. Modules A1-A3 of the structural steel production include the following: The provision of resources, additives, and energy Transport of resources and additives to the production site Production processes on-site including energy, production of additives, disposal of production residues, and consideration of related emissions Granulation process of slag leaving the blast furnace. Allocation An economical allocation was applied for the GBFS taking into account 5 years of market values of Hot Rolled Coil and GBFS. Other materials and chemicals used were modelled using the allocation rule most suitable for the respective product. For further information on a specific product see Gabi Documentation and Worldsteel Association Methodology Report.
Technical purpose of product or process GBFS is used as an additive to cement and concrete, after being finely grounded by the GBFS purchaser/user.
Classification number 1.4.06
Classification
Class name : Hierarchy level
  • OEKOBAU.DAT: 1.4.06 Mineral building products / Mortar and Concrete / Concrete additive
  • IBUCategories: null / null / null
General comment on data set This EPD refers to 1 metric ton of Granulated Blast Furnace Slag. Granulated Blast Furnace Slag (GBFS) is a by-product from the steel industry. In a blast furnace, iron contained raw materials is separated from the other minerals. These minerals are evacuated in the molten phase-out of the furnace, through a runner, into a granulator. The granulator is quenching the molten stream using water. GBFS is a sand-like material consisting mainly by CaO, SiO2, Al2O3 and MgO, combined in a vitreous structure thanks to the granulation. It is sold in this state by ArcelorMittal. The GBFS purchaser/user is finely grinding the material, either separately, or combined with other materials such as clinker. GBFS after grinding is a latent hydraulic binder used as a cement and concrete additive. The use and application of GBFS and ground GBFS is driven by cement and concrete standardization. EN 197-1 describes GBFS characteristics mandatory to produce CEM II, CEM III and CEM V, as well as allowed mixed compositions. EN 15167-1 describes ground GBFS characteristics mandatory to be used in concrete. EN 206 describes concrete allowed mix compositions with ground GBFS. For the use and application of the product, the respective national provisions at the place of use apply.
Copyright Yes
Owner of data set
Quantitative reference
Reference flow(s)
Material properties of the reference flow
    • conversion factor to 1kg: 0.001 -
Time representativeness
Data set valid until 2027
Technological representativeness
Technology description including background system The declaration applies to 1 metric ton of granulated blast furnace slag. The Life Cycle Assessment is based on data collected from the ArcelorMittal integrated plants producing blast furnace slag as a co-product of the steel manufacturing process, representing 100 % of the annual production from 2019. Granulated Blast Furnace Slag (GBFS) is a by-product from the steel industry. In a blast furnace, iron contained raw materials is separated from the other minerals. These minerals are evacuated in the molten phase-out of the furnace, through a runner, into a granulator. The granulator is quenching the molten stream using water. In the typical blast furnace process, hard coal (or coke), iron ore and limestone are introduced into the top of the furnace. From the bottom, hot air is blown into the furnace. Due to the combustion of carbon in the hottest zone (at the bottom) carbon dioxide is formed. The carbon dioxide moves upwards, and when in contact with carbon at lower temperatures, carbon monoxide is formed (boudouard reaction). The carbon monoxide reacts with iron ore (iron oxide) and forms pig iron. The solid content (coal and iron) moves to the bottom of the furnace to the hottest zone (melting zone) where the iron is melted and removed from the furnace in liquid state. Slag is formed at the bottom of the furnace (it`s a mixture of different oxides). Waste gases (containing excess carbon monoxide) leave the furnace at the top and are incinerated which produces electricity (energy credit is modelled). System boundary: Type of the EPD: cradle-to-gate. Modules A1-A3 of the structural steel production include the following: The provision of resources, additives, and energy Transport of resources and additives to the production site Production processes on-site including energy, production of additives, disposal of production residues, and consideration of related emissions Granulation process of slag leaving the blast furnace. An economical allocation was applied for the GBFS taking into account 5 years of market values of Hot Rolled Coil and GBFS. Other materials and chemicals used were modelled using the allocation rule most suitable for the respective product. Technical data: GBFS minimum technical specifications have to answer the criteria listed in EN 197-1: CaO+SiO2+MgO > 66 % (CaO+MgO)/SiO2 > 1 Glass ratio > 66 % Declared unit: The declaration refers to the functional unit of 1 metric ton of Granulated Blast Furnace Slag as specified in Part B requirements on the EPD for cement. The Life Cycle Assessment is based on data collected from the following ArcelorMittal plants: Aviles-Gijon (Spain) Bremen (Germany) Dabrowa (Poland) Dunkirk (France) Eisenhüttenstadt (Germany) Fos-sur-Mer (France) Gent (Belgium) The final results reflect the weighted average per production volume of European ArcelorMittal blast furnace plants. When comparing the LCA results average against specific LCA results from the sites included in this study, variance is within the expected range. For GWP, the variance was within an 8 % range. The background data are taken from GaBi ts Documentation.

Indicators of life cycle

IndicatorDirectionUnit Production
A1-A3
Input
  • 80.12
Input
  • 0
Input
  • 80.12
Input
  • 741.5
Input
  • 0
Input
  • 741.5
Input
  • 0
Input
  • 0
Input
  • 0
Input
  • 1.129
Output
  • 1.745E-7
Output
  • 0.4553
Output
  • 0.03574
Output
  • 0
Output
  • 0
Output
  • 0
Output
  • 0
Output
  • 0

IndicatorUnit Production
A1-A3
  • 82.81
  • 2.898E-13
  • 0.03484
  • 0.1399
  • 0.01429
  • 0.000008454
  • 642.2