Cradle to Consumer
Identity ID
7755e33f-4e8b-4f9b-a3d6-002ca1600bf1
Materials
Associated ID
e31a7383-7394-44e0-90c6-fd6435882882
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. This dataset represents the production of magnesium ingots. After crude magnesium is obtained through the Pidgeon process for magnesium smelting (crystalline magnesium contains a large amount of metallic impurities (Mn, Zn, Al, Si) and non-metallic impurities (oxides, etc.)), it is obtained through flux refining; it has characteristics such as low density, high specific strength and excellent electromagnetic shielding performance, and is an important metal material for lightweight manufacturing. The key upstream starting raw material of the product is crude magnesium; downstream, it is applied in industrial fields such as automotive, aerospace, electronics and metallurgy. The dataset contains the main raw and auxiliary materials, energy 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 formed by merging data from multiple sources.
Activity Description
The entire production process includes the refining ingot casting process, covering the entire process from crude magnesium to magnesium ingots.
Process Description
Magnesium ingots are produced by first obtaining crude magnesium via the Pidgeon process (the crude magnesium contains a large amount of metallic impurities (Mn, Zn, Al, Si) and non-metallic impurities (oxides, etc.)), and then refining it with flux. It can be used in alloy manufacturing, structural materials, and chemical reactions, and is widely applied in industries such as automotive, aerospace, electronics, and metallurgy. With properties of low density, high specific strength, and excellent electromagnetic shielding performance, it is an important metal material for lightweight manufacturing.
Time period
2023
2026
Geography
China,Sichuan
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The production of magnesium ingots adopts the Pidgeon smelting process. The specific process is as follows: preheat the refining pot to 773~873K, first add 2# flux at the bottom of the refining pot as the bottom flux, and the flux amount is 15%~20% of the mass of the finished magnesium. After the flux melts, add the crude magnesium transported from the reduction workshop into the refining pot, sprinkle a certain amount of fire-extinguishing flux on the surface of the crude magnesium, and heat and melt it at a temperature of 943K. When the magnesium in the refining pot reaches the effective volume height of the refining pot, keep the temperature of the magnesium liquid at 983K, then add the refining flux at an amount of 20kg per ton of magnesium, stir while adding, so that the flux and the magnesium liquid are fully mixed to achieve the purification effect. The refining time is about 10~20min, then control the temperature at 1013~1023K, and let it stand for 15~20min to fully separate the impurities and magnesium. Since the iron content in the molten magnesium increases with temperature, the temperature of the molten magnesium is lowered from 1013K to 983K after standing, and the temperature is maintained at this temperature. Use a magnesium liquid pump to transport the refined magnesium liquid in the upper layer of the refining pot to the continuous casting machine for pouring. The continuous casting machine is constantly rotating at a slow speed. The cast magnesium ingots immediately enter the cooling section, and sulfur powder is sprayed on the surface of the magnesium ingots to prevent oxidation and combustion. After the magnesium ingot comes out of the cooling section, the surface has solidified and will not burn when in contact with air. Then it enters the second stage of cooling until the magnesium ingot is completely formed and releases from the mold.