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Process Data set: cement milling;cement, alternative constituents 21-35%;shaft kiln (en) en zh

Key Data Set Information
Location CN
Name
cement milling;cement, alternative constituents 21-35%;shaft kiln
Use advice for data set When using this dataset for Life Cycle Assessment (LCA) of cement produced with alternative constituents in a shaft kiln, note the specific conditions such as the percentage of alternative materials (21-35%) and the energy consumption characteristics of the production process. Consider the technological applicability to the targeted region or industry. Ensure inclusion of all relevant inputs and outputs in the system boundary for accurate representation, and account for high dust emissions in the environmental impact assessment. Avoid extrapolating the data to processes different from those described, such as those using rotary kilns, which may have different technological and environmental profiles.
Technical purpose of product or process The technical application of this data set is targeted towards the cement milling industry. The described cement milling process involves grinding clinker produced from a shaft kiln, with the inclusion of gypsum and alternative constituents ranging from 21-35%, into a fine powder to achieve the final cement product. This milled cement is generally used for construction purposes, including concrete production, infrastructure development, and building construction. The process is characterized by physical grinding without any chemical reactions and refers to production lines associated with vertical kilns, which typically have high energy demands and low production efficiency.
Classification
Class name : Hierarchy level
  • ILCD: Unit processes / Materials production / Other mineralic materials
General comment on data set The clinker from the cement kiln, mixed together with gypsum and other additives, is milled into fine particles of a particular size in the cement milling sub-system, which are a final product of cement. This phase consists entirely of physical processes; no chemical processes are involved.
Copyright No
Owner of data set
Quantitative reference
Reference flow(s)
Technological representativeness
Technology description including background system The clinker from the cement kiln, mixed together with gypsum and other additives, is milled into fine particles of a particular size in the cement milling sub-system, which are a final product of cement. This phase consists entirely of physical processes; no chemical processes are involved, as described and depicted in Fig. 5.
Flow diagram(s) or picture(s)
  • MvDgbrj8JobZ7IxUGAvc7mwZnCd.png Image
Mathematical model
Model description The system boundary is the grinding stage where cement is produced.
LCI method and allocation
Type of data set Unit process, single operation
Deviation from LCI method principle / explanations None
Deviation from modelling constants / explanations None
Data sources, treatment and representativeness
Deviation from data cut-off and completeness principles / explanations None
Deviation from data selection and combination principles / explanations None
Deviation from data treatment and extrapolations principles / explanations None
Data source(s) used for this data set
Sampling procedure After investigation, the annual production capacity of cement companies using vertical kiln production systems is 100,000 tons of clinker. The overall characteristics of shaft kiln production lines are high energy consumption, limited production capacity, low labor productivity, and large dust emissions. The dynamic metabolism analysis of the shaft kiln production line is carried out in units of 1 hour under normal production levels.
Completeness
Completeness of product model No statement
Validation
Type of review
Dependent internal review
Reviewer name and institution
Data generator
Data set generator / modeller
Data entry by
Time stamp (last saved) 2024-03-19T21:18:09+08:00
Publication and ownership
UUID 44d5e3c7-655d-4bab-b7e1-7574a497d724
Date of last revision 2024-04-20T14:42:06.637092+08:00
Data set version 00.01.005
Permanent data set URI https://lcadata.tiangong.world/showProcess.xhtml?uuid=44d5e3c7-655d-4bab-b7e1-7574a497d724&version=01.00.000&stock=TianGong
Owner of data set
Copyright No
License type Free of charge for all users and uses

Inputs

Type of flow Classification Flow Location Mean amount Resulting amount Minimum amount Maximum amount
Product flow
Materials production / Other mineralic materials 867.679 kg867.679 kg
General comment Cement clinker
Product flow
Materials production / Other mineralic materials 91.829 kg91.829 kg
General comment Mixed materials
Product flow
Materials production / Other mineralic materials 46.276 kg46.276 kg
General comment Gypsum
Elementary flow
Resources / Resources from water / Renewable material resources from water 15.184 m315.184 m3
General comment Water (water content): water contained in the input materials.

Outputs

Type of flow Classification Flow Location Mean amount Resulting amount Minimum amount Maximum amount
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 5.785 kg5.785 kg
General comment Dust. The particle size is not specified. Here we treat it as PM>10.
Elementary flow
Emissions / Emissions to water / Emissions to fresh water 15.184 m315.184 m3
General comment Water
Product flow
Materials production / Other mineralic materials 1000.0 kg1000.0 kg
General comment Cement