Cradle to Consumer
Identity ID
5ccd2fd5-ffbe-4e85-a273-933157e193d2
Materials
Associated ID
2b563c0c-9f60-46fc-a8c7-752ee20cde4f
Included activities starts
Included activities ends
Description
This dataset is a market dataset, representing the consumption market of the region; the dataset includes the transport of the product from the gate to the consumer end, and the transport service is calculated according to the transport situation of this product in this region. Alumina can be used in fields such as the manufacture of refractory materials, electronic substrate materials, and the electrolytic production of aluminium metal; the dataset contains the main raw and auxiliary materials, energy, atmospheric emissions and waste of the production process, and infrastructure such as the manufacture of production equipment and the construction of plant buildings is not included within the dataset boundary; the data inventory is taken from the literature; the process flow of producing alumina by the Bayer process includes batching and slurrying, pre-desilication, digestion, red mud separation, seed decomposition and aluminium hydroxide roasting. The total alumina output is divided into two parts: metallurgical-grade alumina and non-metallurgical-grade alumina, with metallurgical-grade alumina output accounting for about 95-97% of the total alumina output.
Activity Description
The Bayer process for producing alumina includes batching and slurrying, pre-desiliconization, dissolution, red mud separation, seed decomposition and aluminum hydroxide roasting.
Process Description
Aluminum oxide is an inorganic substance with the chemical formula Al2O3, CAS number 1344-28-1, melting point 2054°C, and boiling point 2980°C. It is an ionic crystal that can be ionized at high temperatures. Aluminum oxide can be used in the manufacturing of refractory materials, electronic substrate materials, electrolytic production of aluminum, and other fields.
Time period
2011
2026
Geography
China,Sichuan
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The Bayer process uses higher-grade aluminum ore, mixes it with alkali liquor, lime milk and mother liquor in proportion and grinds it into a slurry. After pre-desiliconization, sodium aluminate is directly dissolved under corresponding temperature and pressure conditions, and then the finished alumina is obtained through processes such as red mud separation, seed decomposition and aluminum hydroxide roasting. For high-grade ores with an aluminum-silicon ratio greater than 7, the Bayer production process is the first choice.