Process information
| Key Data Set Information | |
| Location | CN |
| Geographical representativeness description | A Cement Co., Ltd. along the Yangtze River |
| Reference year | 2022 |
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| Use advice for data set | When using this LCA data, please note that the carbon footprint provided is specific to the clinker production stage and does not include emissions from the clinker calcination process. Therefore, users incorporating this data into wider environmental assessments are advised to account for additional carbon emissions associated with the complete calcination process. Moreover, the appropriateness of using steel slag should be evaluated based on its mineral composition and compatibility with desired clinker specifications such as KH, SM, and IM values. |
| Technical purpose of product or process | This LCA data set involves the production of cement clinker using specific raw materials, among which steel slag is utilized as an iron correction material to save the use of traditional iron-containing materials. The process exemplifies the integration of industrial byproducts, such as steel slag from Wuhan Iron and Steel Co., Ltd., in the creation of cement clinker, an essential precursor for the production of P·I type Portland cement used in a wide range of construction applications. |
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Class name
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Hierarchy level
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| General comment on data set | Producing cement clinker. |
| Copyright | No |
| Owner of data set | |
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| Technological representativeness | |
| Technology description including background system | As can be seen from Figure 1, the main raw materials of cement are calcium materials, siliceous materials, aluminum materials and iron materials. Each raw material forms the cement material mineral phase through high-temperature solid phase reaction. It can be seen from the chemical composition, mineral properties and microstructure of steel slag that steel slag also contains iron phases such as RO, FeO and Fe;O:, thus having the conditions to replace iron correction materials. In addition, steel slag also contains CaO (mostly between 40% and 50%) and other calcium, silicon, aluminum, etc. required for cement burning raw materials, which can save some calcium, siliceous and aluminum raw materials. In view of this steel slag The technical route for making iron correction materials is shown in Figure 2. As can be seen from Figure 2, the mineral component of iron correction materials for general cement is hematite Fe,O;, while the iron phase in steel slag mainly exists in the form of ROFeOFe;O;, FeCF, etc. When steel slag is used as raw material, no matter what form the iron is present in, the iron phase in the high-temperature solid-state reaction can provide the iron component to form the C.AF mineral phase required for cement clinker.Based on the actual production, taking the steel slag transported by Wuhan Iron and Steel Co., Ltd. to a cement company along the Yangtze River for firing cement clinker as an example, the target values of steel slag clinker are: KH=0.91±0.02, SM=2.5±0.1,IM=1.5±0.1. Its raw material components and clinker production formula are shown in Table 1 and Table 2. |
| Flow diagram(s) or picture(s) | |
| Mathematical model | |
| Model description | The functional unit is 1t P·I type Portland cement. The full life cycle carbon emission boundary of cement is set from the "cradle" to the "gate", that is, from the upstream mining, production and transportation stages of energy to the transportation of finished cement to the user enterprise. |
Modelling and validation
Administrative information
Inputs and Outputs