Cradle to Gate
Identity ID
1be859db-7bcd-4c6b-b549-39b2c0761f2b
Materials
Associated ID
822611b6-79b3-46cd-b51a-e423b05a1409
Included activities starts
Included activities ends
Description
This process refers to the production activity of producing 1 kg of silicon-aluminum-iron alloy by the submerged arc furnace. Silicon-aluminum-iron alloy is a deoxidizer commonly used in the steelmaking process. The dataset includes raw and auxiliary materials such as silica, bauxite, and iron filings, and inputs of energy and energy media such as electricity and water; the outputs include the product silicon-aluminum-iron alloy, the waste slag (which can be recovered to cement plants), as well as emissions to water bodies and the atmosphere. The data inventory is formed by merging data from multiple sources, and the data representativeness is optimized using industry standards such as the 3140 Ferroalloy Industry Coefficient Handbook.
Activity Description
The basic principle of producing ferrosilicon-aluminum alloy in a submerged arc furnace is to reduce aluminum oxide and silicon dioxide in the furnace burden with a carbonaceous reducing agent at high temperature, producing silicon and aluminum that combine in varying proportions to form the alloy. Furnace temperature and the holding period are the two key operating parameters. The production activity includes raw-material preparation, furnace smelting, and finished-product dressing and finishing.
Process Description
Silicon-aluminum-iron alloy is a composite strong deoxidizer widely used in the steelmaking process. Silicon-aluminum-iron alloy has high density and low burning loss. The product formed by deoxidizing with silicon-aluminum-iron alloy has a low melting point and easily floats to the surface of molten steel to reduce inclusions in the steel, purify the molten steel, and improve the quality of steelmaking. In the steelmaking process, the use of silicon-aluminum-iron alloy is significantly better than pure aluminum deoxidizer in deoxidizing, desulfurizing, and changing the shape of inclusions in molten steel. At the same time, silicon-aluminum-iron alloy can also be used to produce silicon-aluminum series alloys and reducing agents for metal thermal reduction.
Time period
2005
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Submerged arc furnaces use carbon as a reducing agent to reduce oxides in ores to produce ferroalloys. The mixed charge is added into the furnace, and the electrodes are buried in the charge. Heating is achieved by arc heat and resistance heat generated by the electric current passing through the charge. The molten metal and slag collect at the bottom of the furnace, and iron and slag are regularly tapped through the taphole. The production process is continuous.