Cradle to Gate
Identity ID
03a42a65-2b35-46f3-be28-2d3eb4bc3d3f
Materials
Associated ID
bf9b48dc-de82-47fd-9809-53a239294d4c
Included activities starts
Included activities ends
Description
This dataset represents pellets pressed from ferrosilicon and calcined dolomite after mixing and ball milling, mainly composed of MgO and CaO, with a uniform composition and stable proportions. They are mostly oval-shaped spheres of 40-50 mm, with a dense structure and moderate strength, not easily pulverized during transport and furnace charging, and have good gas permeability and mechanical stability. The key upstream starting raw materials of the product are calcined dolomite and ferrosilicon; the downstream is a key raw material entering the reduction process in the Pidgeon process for magnesium smelting. The dataset includes the main raw and auxiliary materials, energy and wastes of the production process, while infrastructure such as the manufacture of production equipment and plant construction is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources.
Activity Description
The entire production process includes batching, grinding, and pelletizing. The entire process covers the process from ferrosilicon and whitening to pelletization.
Process Description
The pellets, produced by mixing ferrosilicon and calcined dolomite followed by ball milling and pressing, are mainly composed of MgO and CaO, with uniform composition and stable proportions. They are generally elliptical spheres of 40 to 50 mm, with a dense structure and moderate strength, which prevents pulverization during transportation and furnace charging. They also exhibit good gas permeability and mechanical stability. Since the raw materials are finely ground, the pellets have high reactivity and can fully react with the reducing agent under vacuum thermal reduction conditions, making them a key intermediate product that enters the reduction process in the Pidgeon process for magnesium production.
Time period
2023
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The ferrosilicon is crushed into coarse particles of about 3~8mm by the jaw crusher, mixed according to the ratio of calcined dolomite: ferrosilicon = 100:21, and then the mixture is sent to the ball mill for grinding until the particle size reaches 200 mesh. The ground powder is transported to the briquetting machine through a bucket elevator, and is extruded into elliptical spheres of about 40 to 50mm at a pressure of 9.8~29.4MPa. The spheres and powder smaller than 40mm are screened and returned to the briquetting machine, and the qualified spheres are sent to the reduction workshop.