Data on Clinker and Cement Production

The task of entering the data on clinker and cement production is related to a mass balance which should be determined on at plant level. The following plant mass balance diagram will help you to obtain the requested values as required for correct calculations.

Please also see the Protocol Guidance Document (Chapters 7.4 and 6.4).

Figure 8: Schematic diagram on how to determine the clinker mass balance in a plant (e.g. Plant #1)

A second way to a better understanding of the mass balance is the explanation of the mass balance equation. As shown above on the diagram; the inputs and outputs of clinker and also the clinker content in the cement have been taken into account.

Clinker mass balance

Clinker mass balance means:

sum of clinker input = sum of clinker output

The amount of clinker consumed which is calculated in line011 in the Plant sheet can therefore be expressed by the following equation:

In Plant sheet line numbers, this means:
line011 = line008 + line009 - line010 - line010a + line010b + line010c

The following sections refer to the consumption and processing of mineral components.

In addition to the consumption of clinker for cement production, the sum of mineral components consumed for cement production is represented in line018 named ‘Total MIC consumed for Portland and blended cements’.

In addition to the sales of cements, the sales of processed mineral components are summarized in line019 named ‘Total processed MIC's used as clinker or cement substitute sold externally’.

The different types of materials produced are summarised in lines020, line021, line021a and line021b.

Please also see the Protocol Guidance Document (Chapter 6.2) and the glossary for more details on the following definition of the products clinker, cement (equivalent) and cementitious products.

Please refer to the Protocol Guidance Document (Chapter 7.4) for information on the correct accounting of internal transfers of clinker, cement and mineral components (MIC) in the Plant sheets and the Company sheet in relation to line010b, line010c, line017a and line019c.

Clinker, line008:
In the context of this Protocol, clinker refers to grey and white clinker used for the production of grey and white cement. The production of clinker is the main source of CO₂ in cement production.

Cement (equivalent), line021b:
Cement (equivalent)Cement (equivalent) is a cement production value which is determined from clinker produced on-site applying the plant specific clinker/cement-factor. Hence it is a virtual cement production under the assumption that all clinker produced in a plant is consumed for cement production in the same plant and applying the real plant specific clinker/cement factor. is a cement production value, which is determined from clinker produced on-site applying the plant specific clinker/cement-factor. Hence, it is a virtual cement production under the assumption that all clinker produced in a plant is consumed for cement production in the same plant and applying the real plant specific clinker/cement factor.

Cementitious products, line021a:
Cementitious productsAll clinker produced by the reporting company for cement making or direct clinker sale, plus gypsum, limestone, CKD and all clinker substitutes consumed for blending, plus all cement substitutes. For this denominator, the terms “cementitious products” or “binders” are used, as it is a sum of clinker and mineral components. The denominator excludes clinker bought from third parties for the production of cement, since this clinker is already included in the inventory of the third party. consist of all clinker produced by the reporting company for cement making or direct clinker sale, plus gypsum, limestone, CKD and all clinker substitutes consumed for blending, plus all cement substitutes. The terms “cementitious products” or “binders” are used, as it is a sum of clinker and mineral components. Clinker bought from third parties for the production of cement is excluded here, since this clinker is already included in the inventory of the third party. Note that the denominator excludes the following:

• Bought clinker, used for cement production; line650
• Granulated slag and fly ash from coal fired power plants, which are stored or sold to another company without any processing for changing their properties (e.g. grinding or thermal treatment);

• Cement volumes which are traded without any processing.

Cementitious products can therefore be described as the total of all cements and clinker produced by a cement company, excluding the clinker purchased from another company and used to make cement.

Cement, line020:
CementA building material made by grinding clinker together with various mineral components such as gypsum, limestone, blast furnace slag, coal fly ash and natural volcanic material. It acts as the binding agent when mixed with sand, gravel or crushed stone and water to make concrete. While cement qualities are defined by national standards, there is no worldwide, harmonised definition or standard for cement. In the "WBCSD - CSI Cement CO2 and Energy Protocol" and the "Getting the Numbers Right" database, both now managed by GCCA, "cement" includes all hydraulic binders that are delivered to the final customer, i.e., including all types of Portland, composite and blended cements, plus ground granulated slag and fly ash delivered to the concrete mixers, but excluding pure clinker. in the Protocol refers to building materials made by grinding clinker together with various mineral components such as gypsum, limestone, blast furnace slag, coal fly ash and natural volcanic material. It acts as the binding agent when mixed with sand, gravel or crushed stone and water to make concrete. While cement qualities are defined by national standards, there is no worldwide, harmonized definition or standard for cement. In the Cement CO₂ and Energy Protocol and the “Getting the Numbers RightThe GNR (“Getting the Numbers Right” or “GCCA in NumbeRs”) is a key tool in how key sustainability progress is monitored and reported. The GNR database is now managed by the GCCA, having transferred at the end of 2018 from the Cement Sustainability Initiative (an initiative run through the World Business Council for Sustainable Development).” database, “cement” includes all hydraulic binders that are delivered to the final customer, i.e., including all types of Portland cements, composite cements and blended cements, but excluding direct sales of pure clinker”.

Please also see the Protocol Guidance Document (Chapter 6.3) and the Glossary.

Sheets

• See Plant Sheet

FAQs

• See FAQs on Clinker and Cement Production

Line-by-Line

• See Clinker and Cement Production

See Also