In the steelmaking process, 75# ferrosilicon can be used as a deoxidizer to effectively remove oxygen from molten steel and improve the purity and quality of steel. At the same time, it can also be used as an alloying element additive to improve the performance of steel. Add ferrosilicon 75% to molten steel and melt it at high temperature to make it fully react with the molten steel to achieve the purpose of deoxidation and alloying. Compared with other steelmaking additives, 75# fesi has the advantages of high deoxidation effect, high alloying performance and environmental friendliness.

Ferro silicon

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
FeSi90Al3.0	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

Sizes & Packaging

Lump: 10–50mm, 10–60mm, 10–100mm

Granule: 1–3mm, 3–10mm

Powder: 0–1mm

Packaging: ton bag, woven bag, palletized, moisture‑proof

ferro silicon Uses

1) Steelmaking Deoxidation & Alloying

Strong deoxidizer: Reacts with oxygen to form SiO₂, improving steel cleanliness & density
Alloy strengthening: Enhances strength, hardness, elasticity & permeability in carbon steel, low‑alloy steel, spring steel & electrical steel
Dosage: 0.1%–0.5% of molten steel weight

2) Gray Cast Iron Inoculation

Promotes graphite refinement, prevents white cast, improves machinability
Dosage: 0.2%–0.8% of molten iron weight

3) Ductile Iron Production

Acts as auxiliary inoculant for spheroidization, improving nodularity & toughness
Spheroidization auxiliary: 0.5%–1.5%; post‑inoculation: 0.3%–0.8%

4) Cast Steel Smelting

Deep deoxidation & purification for precision & engineering castings
Dosage: 0.2%–0.5%

5) Ferroalloy Production

Used as reducing agent for low‑carbon ferroalloys
Raw material for silicon‑based master alloys

6) Other Applications

Suspension phase in mineral processing
Coating for welding electrodes
Additive for heat‑resistant & wear‑resistant alloys

FAQ

Q: What is Ferro Silicon 75 used for?

A: Mainly used as deoxidizer, alloying agent & inoculant in steelmaking, gray iron, ductile iron & cast steel.

Q: What is the Si content of FeSi75?

A: Silicon content ranges from 72.0% to 80.0%.

Q: Can you customize sizes & grades?

A: Yes, we provide custom sizes, low P/low Al/low C grades.

Q: What is the delivery time?

A: Normally 7–15 days for standard orders.