The silicon content of ferrosilicon 70 needs to reach about 68%-72%, and there are strict restrictions on the content of impurity elements, such as aluminum content generally not exceeding 1.5%, calcium content not exceeding 1.0%, manganese content not exceeding 0.5%, phosphorus content not exceeding 0.04%, sulfur content not exceeding 0.02%, etc. Products with a size of 20-60mm require a small particle size deviation range and uniform size, among which particles with a size below 20mm and above 60mm usually account for no more than a certain proportion of the total mass, such as about 5%. Such a size range not only ensures a certain specific surface area, so that it can fully contact and react with molten steel during steelmaking, but also facilitates transportation, storage and feeding operations.

ferrosilicon 70

chemical composition

Grade	Chemical Composition(mass fraction)%
	Si	Al	Ca	Mn	Cr	P	S	C
	≥	≤
FeSi90Al1.5	87.0~95.0	1.5	1.5	0.4	0.2	0.04	0.02	0.2
FeSi9oAl3.0	87.0~95.0	3	1.5	0.4	0.2	0.04	0.02	0.2
FeSi75Al0.5-A	74.0~80.0	0.5	1	0.4	I0.3	0.035	0.02	0.1
FeSi75Al0.5-B	72.0~80.0	0.5	1	0.5	0.5	0.04	0.02	0.2
FeSi75Al1.0-A	74.0~80.0	1	1	0.4	0.3	0.035	0.02	0.1
FeSi75Al1.0-B	72.0~80.0	1	1	0.5	0.5	0.04	0.02	0.2
FeSi75Al1.5-A	74.0-80.0	1.5	1	0.4	0.3	0.035	0.02	0.1
FeSi75Al1.5-B	72.0~80.0	1.5	1	0.5	0.5	0.04	0.02	0.2
FeSi75Al2.0-A	74.0~80.0	2	1	0.4	0.3	0.035	0.02	0.1
FeSi75Al2.0-B	72.0~80.0	2		0.5	0.5	0.04	0.02	0.2
FeSi75-A	74.0~80.0			0.4	0.3	0.035	0.02	0.1
FeSi75-B	72.0~80.0			0.5	0.5	0.04	0.02	0.2
FeSi65	65.0~72.0			0.6	0.5	0.04	0.02

Application field

Steelmaking industry:

It is a commonly used deoxidizer and alloying element additive. Adding ferrosilicon 70 in the steelmaking process can effectively remove oxygen from molten steel, improve the purity of steel, and improve the quality of steel. At the same time, it can increase the strength, hardness, toughness and wear resistance of steel.

Casting industry:

used as an inoculant, it can promote the precipitation and spheroidization of graphite in cast iron, improve the metallographic structure of cast iron, improve the mechanical properties of castings, such as strength, toughness, wear resistance, etc., reduce the defects of castings, and improve the quality and yield of castings.

Other fields:

in ferroalloy production, it can be used as a reducing agent to produce other ferroalloys; in the chemical industry, it can also be used to manufacture silicides, silicones and other products.

ferrosilicon 70

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The company has received unanimous praise from customers in terms of product quality, delivery time, after-sales service, etc., and is a manufacturer with a high status in the industry.

Service and cooperation:

The company ensures on-time delivery, a perfect after-sales service system, and can provide timely and effective technical support and solutions, and can respond and solve problems quickly when products have problems.

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