Process information
| Key Data Set Information | |
| Location | CN |
| Reference year | 2009 |
| Name |
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| Use advice for data set | The Life Cycle Assessment (LCA) data for this process are to be used with an understanding of the full production line from raw material procurement to the production of cement. It is important to consider the specific energy consumption and emissions during each stage. The user must pay attention to the described incorporation of mixed solid wastes, which serves as a distinct factor in the eco-profile of the process. When applying the data set, ensure adherence to the technological boundaries (years 2009-2012) and the geographical scope (China) to maintain accuracy. |
| Technical purpose of product or process | The described process relates to the production of Portland cement with a compression strength of 42.5 MPa using the New Suspension Preheater (NSP) method, which is a predominant technology for cement manufacturing in China. This type of cement is typically used in construction for making concrete, mortar, and other building materials where high strength is required. |
| Classification |
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| General comment on data set | The Chinese LCI data are calculated with a sample of 18 cement plants with 30 production lines all over China (China Centre of National Material Life Cycle Assessment, 2012).There are three primary production processes .The pulverized coal and raw meal preparation process include the transferring, grinding, homogenizing, and storage of raw materials, and the grinding and storage of coal. In the burning process, the ground and mixed raw materials-raw meal are input to the preheater, and then to the calciner, decomposing with 60 % of coal at 950 °C. The limestone decomposes for about 95 % in the calciner and for 5 % in the kiln. The decomposed materials fall into the kiln and are incinerated to be clinker with 40 % of coal at a temperature of over 1,400 °C. In the finishing process, the cement is produced when clinker, mineral additions, and gypsum are granulated finely by grinding mill. The raw meal is suspended and heated by recycled hot air in preheater. |
| Copyright | No |
| Owner of data set | |
| Quantitative reference | |
| Reference flow(s) | |
| Time representativeness | |
| Time representativeness description | Data collection year: 2009-2012 |
| Technological representativeness | |
| Technology description including background system | There are three primary production processes (Fig. 1).Thepulverizedcoal and raw meal preparation process include the transferring, grinding, homogenizing, and storage of raw materials, and the grinding and storage of coal. In the burning process, the ground and mixed raw materials-raw meal are input to the preheater, and then to the calciner, decomposing with 60 % of coal at 950 °C. The limestone decomposes for about 95 % in the calciner and for 5 % in the kiln. The decomposed materials fall into the kiln and are incinerated to be clinker with 40 % of coal at a temperature of over 1,400 °C. In the finishing process, the cement is produced when clinker, mineral additions, and gypsum are granulated finely by grinding mill. The raw meal is suspended and heated by recycled hot air in preheater. That is why it is called NSP cement production technology. |
| Flow diagram(s) or picture(s) | |
| Mathematical model | |
| Model description | "1 ton of Portland cement" and "1 ton of Portland cement with strength class 42.5 MPa" are both used as functional units. |
Modelling and validation
Administrative information
Inputs and Outputs