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What is the main purpose of silico-manganese alloy

2021-07-24

Silico-manganese alloy is a commonly used compound deoxidizer and reducing agent in steelmaking. It is used to produce low-carbon ferromanganese and electrothermally produce metallic manganese. What is the main purpose of silico-manganese alloy? Let's follow the editor to look down.

Silico-manganese alloy is an alloy composed of manganese, silicon, iron and a small amount of carbon and other elements. It is an iron alloy with a wide range of uses and a large output. Its consumption ranks second among electric furnace ferroalloys, and silicon has a strong affinity with manganese and oxygen.

When silico-manganese alloy is used in steelmaking, the deoxidation products MnSiO3 and MnSiO4 produced are 1270°C and 1327°C, respectively, which have the advantages of low melting point, large particles, easy to float, and good deoxidation effect. Under the same conditions, when manganese or silicon is used alone for deoxidation, the combustion rates are 46% and 37%, respectively, and when silicomanganese alloy is used for deoxidation, the combustion loss rates of both are 29%. Therefore, it has been widely used in steelmaking, and its output growth rate is higher than the average growth rate of ferroalloys and also higher than the growth rate of steel. It has become an indispensable composite deoxidizer and alloy additive in the iron and steel industry. The silico-manganese alloy with a carbon content of less than 1.9% is also a semi-finished product used to produce low-carbon iron manganese and electrothermal silicon metal manganese.

The silico-manganese alloy used in steel smelting is usually called commercial silico-manganese alloy, and the silico-manganese alloy used in smelting low-carbon iron is called self-use silico-manganese alloy. Silicon-manganese alloy used in metal smelting. Used in high silicon manganese silicon alloy. Manganese can be combined with silicon to form silicides MnSiO3, MnSiO and MnSiO3. It can be seen from the silico-manganese state diagram that the stable silicide is MnSi. Due to the negative value of free energy formed by manganese silicide, it is much larger than the negative value of free energy produced by manganese carbide. The higher the silicon content, the lower the carbon content.

The above is the main purpose of silico-manganese alloy. Thank you for your attention and support. If you want to know more, please follow the official website of Fangyuan Rare Earth. This site will share more good articles for you. See you next time!

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