Products

Ferrosilicon


Ferrosilicium, or ferrosilicon – it is an alloy of silicon and iron is used as a deoxidant of steel and for alloying thereof. Ferrosilicon is used as a deoxidizing agent in different alloys and metals production by way of silicon reduction.

It is broadly used smelting of spring steels, heat-resistant and rust resisting steels, electrotechnical steels, thermite mixtures.

Silicon that is included in ferrosilicon contributes to increasing of ultimate stress limit, plasticity and resilience. It also reduces impact value and improves an oxidative stability. Silicon steel is widely used in shock absorber springs, and electrical transformer steel with silicon is a beautiful base for electrotechnical goods production.

The following shows how ferrosilicon influences upon steels:

it increases hardness penetration;

it normalizes annealing temperature;

it improves hardness and strength;

it reduces plasticity;

it increases oxidation resistance grade.

it increases the grain dimension of the material, the more substance, the better grain fineness;

There is about 0,35% of Si in steel mostly. Is there more of silicon, the steel can be determined as an extrinsic silicon composition.

1.30–2% of Si. Such percentage increases elasticity limit and flow index. It also increases compressibility and expansive properties during a high impact resistance. Such a percentage of the ferrosilicon allows to get constructional steel.

2.5–4.2% Si and carbon less than 1%. The main characteristic feature is a low magnetics level which allows to use it in electric generators and transformers production.

This alloy is used to increase material strength properties of readymade steel. It also an effective deoxidant and alloying addition of different alloys. Due to this component material is heat and rust resistant, elasticity and flow strength, as well as a resistance to tensile strain.

Zaporozhje Ferro Alloys Factory Public company (ZFZ), from the city of Zaporozhje, Ukraine, is the chief deliverer of ferrosilicon in our company.

Ferrosilicon of ZFZ production is characterized by different silicon content and granulometry.

Different silicon content:

FeSi 45

FeSi 58

FeSi 65

FeSi 70

FeSi 75

Granulometry

Fractions: 0–5 mm, 10–50 mm, 10–80 mm, 10–100 mm, 0–300 mm.

Granulometry of ferrosilicon should correspond to the grain size category from the table below:

Grain-size fraction

Size of pieces of ferrosilicon, mm

Mass fraction of pieces in order of size in a shipment, %

The maximum size of oversize lumps for the average measurements in three dimensions, mm

no more than

oversized

undersized

1

From 20 to 200 inclusive

10

10

300

2

From 20 to 100 inclusive

10

10

200

3

From 5 to 100 inclusive

10

10

200

4

From 5 to 50 inclusive

10

10

100

5

From 5 to 25 inclusive

10

15

50

6

From 1 to 300 inclusive

10

350

Ferrosilicon as smelted by the enterprise meets the requirements of the State Standards of Ukraine 4127: 2002, which were approved and put into force by the Order No 14, of the State Standard of Ukraine of January 31st , 2004, as is shown in the following table:

Alloy grade

Mass / weight percentage, %

Silicon

Carbon

Sulphur

Phosphorus

Aluminium

Manganese

Chrome

No more

FeSi 75

over 74 « 80 «

0,2

0,02

0,05

3,0

0,5

0,5

FeSi 70

over 68 « 74 «

0,2

0,02

0,05

2,5

0,5

0,5

FeSi 65

from 63 « 68 «

0,2

0,02

0,05

2,5

0,5

0,5

FeSi 45

from 41 « 47 «

0,2

0,02

0,05

2,0

1,0

0,5

For instance:

Ferrosilicon FeSi 65-3 (10-80): ferrosilicon with a total silicon weight percentage 63,0 to 68,0%, of a size grade category 3 (fraction 10-80)