Cradle to Gate
Identity ID
2a78fd3f-a915-46a0-bb66-deebb97f49ad
Materials
Associated ID
d730c255-31b8-4c97-8eda-073969c50ecd
Included activities starts
Included activities ends
Description
This process refers to the production activity of producing 1 kg of medium-carbon ferromanganese by the electro-silicothermic process. Medium-carbon ferromanganese has a carbon content of 0.7%-2.0% and serves the functions of deoxidizer, desulfurizer, and alloy additive in the steel industry, being widely used in the smelting of special steel grades such as stainless steel and tool steel. The dataset includes raw and auxiliary materials such as manganese ore, silicomanganese alloy, electrodes, and limestone, and inputs of energy and energy media such as electricity and water; the outputs include the product medium-carbon ferromanganese, the wastes slag and dust-collection ash (which can be recovered to cement plants for comprehensive utilization), 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
Medium carbon ferromanganese is produced using silicon-manganese alloy, manganese ore, and limestone as raw materials, using a refining furnace (electric silicothermal method). During the heating process of the charge in the charge area, the silicon in the silicon-manganese alloy is mainly used as a reducing agent to reduce the MnO obtained from the manganese ore. The silicon is oxidized to achieve the purpose of refining and desiliconization. After the silicon in the alloy drops to the specified limit, a medium-carbon ferromanganese with a carbon content similar to that of the silicon-manganese alloy is obtained. The overall process flow mainly includes arcing and arcing of the refining furnace - feeding (manganese ore, lime) - melting of raw materials - adding silicon-manganese alloy (liquid) - refining - tapping.
Process Description
Medium carbon ferromanganese is a type of ferromanganese alloy classified by carbon content, with its carbon content ranging from 0.7% to 2.0%. This alloy functions as a deoxidizer, desulfurizer and alloy additive in the steel industry, and is widely used in the smelting of special steel types such as stainless steel and tool steel.
Time period
2023
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Using silicon-manganese alloy, manganese ore, and limestone as raw materials, it is produced using a refining furnace (electric silicothermal method)-hot charging process, which is a method widely used at home and abroad. During the heating process of the charge in the charge area, the silicon in the silicon-manganese alloy is mainly used as a reducing agent to reduce the MnO obtained from the manganese ore. The silicon is oxidized to achieve the purpose of refining and desiliconization. After the silicon in the alloy is reduced to the specified limit, medium/low carbon ferromanganese with a carbon content similar to that of the silicon-manganese alloy is obtained.