Cradle to Gate
Identity ID
5a94bdca-c0ea-4e7d-95a3-cd66eb6ee163
Materials
Associated ID
c824a866-2d3c-414c-8f96-6f74efb01504
Included activities starts
Included activities ends
Description
This dataset represents the production of calcium-based bentonite produced by a grinding technology. The production process includes crushing, screening, drying and grinding. The data are mainly sourced from publicly available reports and official standards. Information on the emission inventory:
1. For the emissions of pollutants such as SO2 and NOx, fuel-combustion emission values are used.
2. For the emissions of PM (≤2.5 μm), PM (2.5-10 μm) and PM (≥10 μm), estimates are made based on the total particulate-matter values and emission factors from publicly available literature.
3. All emission quantities take into account the discharge limits of the Ambient Air Quality Standards.
Activity Description
The boundary of the production activities of this product is the calcium bentonite production stage, including rolling, screening, drying, grinding and other processes, covering pollutant gas emissions and dust particle emissions from fuel combustion, as well as the loss of water content inside the bentonite mine.
Process Description
Calcium bentonite is a natural clay mineral with montmorillonite as its core component. Its main chemical composition is SiO₂, Al₂O₃ and CaO. It is commonly used as adhesive in the industrial field, sealing and stabilization of waterproof blankets in construction projects, waste carriers and soil conditioners in agriculture and animal husbandry, wastewater treatment and pet bedding sand, etc.
Time period
2021
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
This technology involves rolling, screening, drying, grinding, and other steps. It primarily relies on mechanical equipment and is the most commonly used, simple, and convenient method for bentonite production.