Cradle to Gate
Identity ID
29b3e322-3ec7-4d0f-8204-14974565435b
Materials
Associated ID
85721404-c678-47ad-8166-8e5cd6428d5a
Included activities starts
Included activities ends
Description
This dataset represents the production of sodium bentonite. The production process includes stages such as drying, sodium activation and grinding. The main data are sourced from public reports and official standards. Information about the emission inventory:
1. For the emissions of pollutants such as SO2 and NOx, the values are taken from the fuel combustion emissions.
2. For the emissions of PM (≤2.5 μm), PM (2.5-10 μm) and PM (≥10 μm), the values are estimated based on the total particulate matter and emission factors from public literature.
3. For the emissions of pollutants such as wastewater, the values are taken from measured values in public reports.
4. All emission quantities take into account the emission limits of the ambient air quality standards.
Activity Description
The production system boundary of this product covers the sodium bentonite production stage, including drying, sodication, grinding and other processes, which involve pollutant gas emissions from fuel combustion, dust particle emissions, and water used for dust suppression.
Process Description
Sodium bentonite is a natural clay mineral with montmorillonite as its core component. Its main chemical components are SiO₂, Al₂O₃ and Na₂O. Its key properties are excellent swelling properties and cation exchange capabilities when exposed to water. With its high viscosity, high expansion and strong adsorption, sodium bentonite is widely used in drilling mud, iron ore pellet bonding, underground engineering waterproof sealing, and as an efficient anti-seepage material for the lining of landfills and water conservancy projects.
Time period
2024
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
This technology involves processes such as drying, sodium activation, and grinding. Under specific conditions, Ca²⁺ in calcium bentonite is replaced by Na⁺, thereby converting it into sodium bentonite. The advantages of this method are its simplicity, low cost, and environmental friendliness. The disadvantages are limited sodium activation effect and low product performance.