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Process Data set: cement production;cement, ordinary portland cement;JT shaft kiln (en) en zh

Key Data Set Information
Location CN
Name
cement production;cement, ordinary portland cement;JT shaft kiln
Use advice for data set Users should apply this data set considering the coverage of direct and indirect environmental impacts encompassing the four main cement production stages (raw meal preparation, clinker burning, cement grinding, and packaging) as well as limestone mining, coal production, and electricity generation associated with the upstream process. It is essential to adhere to assumptions such as the transportation distances for limestone and coal when applying the data to ensure comparability.
Technical purpose of product or process JT shaft kiln cement production data is intended for use in evaluating the environmental impact of producing 1t of ordinary Portland cement. This data can be applied in the construction industry for comparative analyses of cement production methodologies concerning resource and energy consumption as well as pollutant emissions.
Classification
Class name : Hierarchy level
  • ILCD: Unit processes / Materials production / Other mineralic materials
General comment on data set The impact of a typical JT shaft kiln process on the resource consumption, energy consumption and environmental emissions involved in the cement production life cycle was quantified using 1t of ordinary silicate cement as a functional unit.
Copyright No
Owner of data set
Quantitative reference
Reference flow(s)
Technological representativeness
Flow diagram(s) or picture(s)
  • Cxg1bkRfnorpV8xQpHhc09AinUb.png Image
Mathematical model
Model description Taking 1 ton of ordinary Portland cement as the functional unit. The scope of the study is defined as the first and second stages of cement production, that is, the direct environmental impact of the four processes of raw meal preparation, clinker burning, cement grinding, packaging and delivery, as well as the upstream limestone mining and coal production processes. Indirect environmental impacts arising from production and electricity production processes and raw material transportation.
LCI method and allocation
Type of data set LCI result
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
Data selection and combination principles The research scope includes raw material mining and processing, so it involves primary resources, energy consumption and pollution emissions of limestone, coal production, electricity production and raw material transportation. The data comes from the research results of Di Xianghua and Li Lu. In order to eliminate the difference in transportation distance, it is assumed that all limestone is transported by road using 20t diesel vehicles with a transportation distance of 10km, and raw coal is transported by rail with a 3000t diesel locomotive with a transportation distance of 100km.The cement production resource consumption data adopts the research results of Li Songbing. The energy consumption comes from the data published by the Cement Industry Association and refers to the "2010 Cement Industry Risk Analysis Report". The emission coefficients of powder (smoke) dust and SO2 and NOx pollutants in the exhaust gas adopt the 2008 Statistical results of China's pollution source census; CO2 emissions are estimated according to their sources. The research results of Gao Changming were used for the unpublished emission coefficient of JT vertical kiln.
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
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 dc6ebda0-f78c-410d-b214-069459042073
Date of last revision 2024-04-20T14:41:27.434294+08:00
Data set version 00.01.005
Permanent data set URI https://lcadata.tiangong.world/showProcess.xhtml?uuid=dc6ebda0-f78c-410d-b214-069459042073&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
Elementary flow
Resources / Resources from ground / Non-renewable material resources from ground 1450.0 kg1450.0 kg
General comment Limestone. The resource consumption data is based on the research results of Li Songbing.
Product flow
Energy carriers and technologies / Hard coal based fuels 192.0 kg192.0 kg
General comment Raw coal. The energy consumption data comes from the Cement Industry Association and refers to the "2010 Cement Industry Risk Analysis Report".
Elementary flow
Resources / Resources from ground / Non-renewable energy resources from ground 4.66 MJ4.66 MJ
General comment Crude oil. The energy consumption data comes from the Cement Industry Association and refers to the "2010 Cement Industry Risk Analysis Report".
Product flow
Materials production / Organic chemicals 5.949999999999999E-4 kg5.949999999999999E-4 kg
General comment Diesel. The energy consumption data comes from the Cement Industry Association and refers to the "2010 Cement Industry Risk Analysis Report".

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 2.0 kg2.0 kg
General comment Dust and particulate matter, with an unspecified particle size, is treated as PM > 10 micrometers in diameter. The emission factor of particulate matter (PM) pollutant in flue gas is based on the statistical results of the 2008 China Pollution Source Census.
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 1.58 kg1.58 kg
General comment SO2. The emission factor of SO2 pollutant in flue gas is based on the statistical results of the 2008 China Pollution Source Census.
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 0.849 kg0.849 kg
General comment NOx. The emission factor of NOx pollutant in flue gas is based on the statistical results of the 2008 China Pollution Source Census.
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 684.0 kg684.0 kg
General comment CO2. CO2 emissions are estimated based on their sources. The specific estimation method is as follows:①CO2 produced from carbonate decomposition. During the cement production process, the decomposition of limestone to produce cement clinker requires CaO, which also generates CO2. The chemical reaction is as follows: CaCO3→CaO+CO2↑. The chemical equation for the decomposition of CaCO3 shows that for every 1 part of CaO produced, 0.7857 parts of CO2 are also generated. Based on the average content of CaO in the main mineral components of ordinary Portland cement in China, which ranges from 62% to 67%, assuming 65%, the CO2 produced from the decomposition of CaCO3 for every ton of cement clinker produced is: 1 ton × 0.7857 × 65% = 0.5071 ton. In addition, cement raw materials usually contain a small amount of magnesium carbonate, which also decomposes and produces CO2 during calcination. The chemical reaction is as follows: MgCO3→MgO+CO2↑. The chemical equation for the decomposition of MgCO3 shows that for every 1 part of MgO produced, 1.1 parts of CO2 are also generated. Based on the average content of MgO in the main mineral components of ordinary Portland cement in China, which ranges from 1% to 3%, assuming 1.5%, the CO2 produced from the decomposition of magnesium carbonate for every ton of cement clinker produced is: 1 ton × 1.1 × 1.5% = 0.0165 ton. In summary, the total amount of CO2 produced from carbonate decomposition during cement clinker production is: 0.5071 ton + 0.0165 ton = 0.5236 ton.②CO2 emitted from cement kiln fuel combustion. The formation of cement clinker requires high-temperature calcination, during which CO2 is generated from fuel combustion to provide high temperature. According to research results from the IPCC, the carbon emission factor of raw coal in China is 2.7715 kg CO2/kg of raw coal.
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 0.108 kg0.108 kg
General comment CO
Elementary flow
Emissions / Emissions to air / Emissions to air, unspecified 1.22 kg1.22 kg
General comment CH4
Product flow
Materials production / Other mineralic materials 1000.0 kg1000.0 kg
General comment Ordinary Portland Cement