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Ferrosilicon

 

Your Leading Ferrosilicon Supplier in China

Guangzhou Shenglong Import And Export Trade Co., Ltd have several factories in Henan. Our main products are: silicon manganese, industrial silicon, steel sand aluminum, aluminum block, aluminum iron, silicon aluminum iron, ferrochrome, ferromanganese, manganese ore, carburizing agent and so on.

R&D Capability

We have laboratories and our own technical center equipped with advanced chemical analysis equipment, physical testing chambers and experimental workshops that can conduct small-scale to large-scale testing.

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We can produce various types of ferroalloy according to customer demand, at the same time, chemical composition and particle size can also be customized.

 

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We have four production lines with an annual output of 50,000 tons. All our products are shipped directly from the production site, which enabled us to provide our partners with high quality, low price and competitive services.

 

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Third-party testing institutions guarantee that each batch of goods meets the requirements of our partners. Our production process is implemented under the advanced quality control mechanism, and each link is strictly controlled to ensure that the goods delivered to the partner are fully qualified.

 

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What is Ferrosilicon

Ferrosilicon is an alloy of iron and silicon with a typical silicon content by weight of 15–90%. It contains a high proportion of iron silicides.
Ferrosilicon is produced by reduction of silica or sand with coke in the presence of iron. Typical sources of iron are scrap iron or millscale. Ferrosilicons with silicon content up to about 15% are made in blast furnaces lined with acid fire bricks.
Ferrosilicons with higher silicon content are made in electric arc furnaces. The usual formulations on the market are ferrosilicons with 15%, 45%, 75%, and 90% silicon. The remainder is iron, with about 2% consisting of other elements like aluminium and calcium. An overabundance of silica is used to prevent formation of silicon carbide. Microsilica is a useful byproduct.

 

 
Ferrosilicon Properties

 

Compound Formula FeSi
Molecular Weight 83.93
CAS # 8049-17-0
MDL Number MFCD00016086
EC No 617-088-7
Appearance Gray metallic solid in various forms (plate, bar, sheet, strip, billet, wire, pipe, tubes, electrodes, or powder)
Solubility in H2O Insoluble
Exact Mass 83.912 g/mol
Monoisotopic Mass 83.912 g/mol

 

 
Chemical Composition

 

Element Content (%)
Silicon, Si 74 - 78
Iron, Fe ≥ 21.32
Aluminum, Al ≤ 0.50
Carbon, C ≤ 0.050
Sulfur, S ≤ 0.0030
Phosphorous, P ≤ 0.020

 

 
Physical Properties

 

Properties Metric Imperial
Density 3.20 g/cm3 0.116 lb/in3
Melting point 1200-1250°C 2192-2282°F
Boiling point 2355°C 4271°F

 

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How is Ferrosilicon Made

 

Ferrosilicon, commonly abbreviated FeSi, is an iron–silicon alloy that also contains smaller proportions of other elements. The most popular grade of ferrosilicon contains 75 wt% silicon (‘FeSi75’), but the amount can range from 15–90 wt% depending on the application.
The highest-quality ferrosilicon is made in an electric arc furnace by reducing silica with coke in the presence of iron (usually derived steel scrap or iron ore). The ferrosilicon usually takes the form of shiny, metallic-grey lumps, but is also available as pre-formed briquettes.

What are the Types of Ferrosilicon

 

Ferrosilicon is often categorized according to the levels of various minor components, depending on the application requirements. These categories include:
●Low-carbon ferrosilicon and ultra-low-carbon ferrosilicon: Used to avoid re-introducing carbon during the manufacture of stainless steel and electrical steel.
●Low-titanium (high-purity) ferrosilicon: Used to avoid TiN and TiC inclusions in electrical steel and some special steels.
●Low-aluminium ferrosilicon : Used to avoid the formation of hard Al2O3 and Al2O3–CaO inclusions in a range of steel types.
●Special ferrosilicon: A general term that covers a range of tailor-made products containing other alloying elements.

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What are the Advantages of Using Ferrosilicon in Steelmaking and Other Applications
 

Deoxidization

In steelmaking, ferrosilicon effectively removes oxygen and other impurities from molten iron, leading to better steel quality and performance.

Alloying

It enhances the properties of various alloys, making them more suitable for specific applications. For example, it can improve the machinability and strength of cast iron.

Reducing Agents

Ferrosilicon is used as a reducing agent in the production of other metals, like ferrochrome and silicon, which are crucial in various industries.

Controlled Silicon Content

In the electronics industry, ferrosilicon is used to control and refine the silicon content in silicon-based materials, which is important for semiconductor production.

 

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Common Application Areas of Ferrosilicon

●As a source of silicon to reduce metals from their oxides and to deoxidize steel and other ferrous alloys.
●Manufacture of other ferroalloys.
●Manufacture of silicon, corrosion-resistant and high-temperature resistant ferrous silicon alloys, and silicon steel for electromotors and transformer cores.
●Manufacture of cast iron, ferrosilicon is used for inoculation of the iron to accelerate graphitization.
●Manufacture of prealloys like magnesium ferrosilicon, used for modification of melted malleable iron.
●As an additive to cast irons for controlling the initial content of silicon
●In steel melting, casting, mineral processing and melting rod industry.
●Used in the Pidgeon process to make magnesium from dolomite.
●For heavy media separation and atomization.
●Used in casting, melting and related metallurgy industry.
●For production of semiconductor pure silicon in electric industry and silicon copper in chemistry industry.

 

Production Process of Ferrosilicon

Ferro silicon is produced by smelting a mixture of iron and silicon in an electric arc furnace. The process involves the following steps

Raw Materials

The primary raw materials for ferro silicon production are iron ore, coke, and quartz. Iron ore is used as a source of iron, coke is used as a reducing agent, and quartz is used as a source of silicon.

01

Mixing

The raw materials are mixed in a specific ratio and charged into an electric arc furnace. The furnace is lined with refractory material to withstand high temperatures.

02

Smelting

The mixture is heated to a temperature of around 2000°C using electric arc technology. The heat generated by the arc melts the raw materials, and the chemical reaction between iron and silicon produces ferro silicon.

03

Refining

The molten ferro silicon is then poured into a ladle and refined to remove impurities such as sulfur, phosphorus, and other non-metallic elements.

04

Cooling and Solidification

The refined ferro silicon is then poured into molds and allowed to cool and solidify. The resulting ingots can be further processed into smaller sizes, depending on the application.

05

 

What is Ferrosilicon Used for
Silica Alumina Carbon
Silicon Barium Calcium Alloy
FerroSilicon Ball
Silicon Carbide

Ferrosilicon is Used in the Steel Industry as Deoxidizer
In order to ensure the quality of steel, the molten steel must be deoxidized at the last lap of steel making. Silicon has a great affinity to oxygen, so ferrosilicon is an ideal deoxidizer. The ferrosilicon is not only reacted to oxygen but also reacts to sulfur, so it can remove the sulfur in the molten steel.
Ferrosilicon with a silicon content of 45%-90% is used in the steel industry. Ferrosilicon with 75% silicon is the most widely used in the steel industry for the following reasons:
75# ferrosilicon production process is mature and cost-effective.
75# ferrosilicon is heavier and not affected when adding.
75# ferrosilion with high silicon content, during the reducing period, it release a lot of heat, which can increase the temperature in the furnace.

Ferrosilicon is used in the Steel Industry as an Alloying Agent
The intension, hardness, and elasticity of steel will be significantly improved by adding a certain amount of silicon. Therefore, ferrosilicon is used as alloy agent for smelting constructional steel (Si 2.81-4.8%), tool steel (Si 0.30-1.8%), spring steel(Si0.40-2.8%), and silicon steel for transformer (Si2.81-4.8%). Ferrosilicon used as an alloying agent can improve the steel quality, reduce cost, and save iron effectively.

Ferrosilicon is Used as Inoculant and Nodulizer
Ferrosilicon is used as an inoculant and nodularizer in the cast iron industry. Cast iron is cheaper than steel, however, its mechanical property is close to the mechanical property of steel, and it is more shock resistant than steel.
Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbides in iron and promote the precipitation and spheroidization of graphite.

Ferrosilicon is Used in Smelting Magnesium Metal
Ferrosilicon is used in the smelting process of magnesium ingot. The magnesium in CaO.MgO is replaced. Each ton of metal magnesium needs about 1.2 tons of ferrosilicon.

Low Aluminum Ferrosilicon is Used in the Steel Industry
Compared to regular ferrosilicon, low Al Ferrosilicon is used in the production of low Al steel in the steel industry. In the high carbon steels production process, the use of low-aluminum ferrosilicon can prevent nozzle blockage during continuous casting. Reduced aluminum content will help to avoid surface defects, particularly relevant to mirror finish stainless steel. For the production of tire cords, in which content control is also important, the manufacturer
recommends the use of low Al ferrosilicon.
High-silicon ferrosilicon can be used to produce silicone and other products in the chemical industry.

Atomized Ferrosilicon Powder Uses
The atomized ferrosilicon powder can be used in the mineral processing industry. The atomized ferrosilicon powder for heavy media separation for ores, mainly in the separation of iron ores. Heavy medium ferrosilicon, which is a specially smelted ferrosilicon alloy. It has the characteristics of oxidation resistance, high hardness, and strong magnetism.
Compared to other heavy media like magnetite, ferrosilicon has the advantage of greater hardness and of high specific gravity. It can be returned to reuse. When the silicon content in ferrosilicon is less than 13%, the toughness increases, it is hard to grind and easy to oxidize in water, when the silicon content is more than 18%, the magnetic weakness is inconvenient to recover. Therefore, 13%-18% silicon and 87%-82% iron are suitable for use.

 

 
Common Problem of Ferrosilicon

 

Q: Is Ferrosilicon toxic?

A: Yes, ferrosilicon is quite toxic, and direct contact should be avoided. When exposed to moisture, ferrosilicon can produce toxic and flammable gasses, hazardous to human health. Ferrosilicon can cause irritation to the skin and eyes, and an irritated respiratory tract when inhaling the gasses. The necessary precautions should be made when handling the product, including personal protective equipment such as filter respirators, goggles, protective gloves and clothes.

Q: What is the difference between Atomised and Milled Ferrosilicon?

A: Not sure about Milled vs. Atomized Ferrosilicon for your process needs? Milled 15% Ferrosilicon is the most cost-effective option, but quality is however not always constant, leading to difficult operation and inconsistent consumption. Finer grades of Ferrosilicon, leading to higher milling costs, yet causes higher loss. Atomized Ferrosilicon, although more expensive of the two Ferrosilicon ranges, offers lower (and more consistent)consumption.

Q: How is Ferrosilicon used diamond processing plants?

A: Ferrosilicon is used in a number of different applications and industrial processes, but mainly in diamond processing plants. Ferrosilicon is used to create a medium with a very specific density that will facilitate the separation of diamonds from diamond-bearing material, by means of dense media separation / the sink-float method. Ferrosilicon is manufactured in different grades, each with slightly different characteristics and properties, which makes it easier to select the right grade for use in diamond processing plants.

Q: What are the advantages of ferrosilicon powder?

A: Ferrosilicon powder is produced by fine grinding together with a professional grinding machine. In the actual process of using ferrosilicon powder, ferrosilicon powder can be absorbed faster than ferrosilicon block, so the ferrosilicon powder is far more reactive than the bulk Fast speed and good effect!

Q: What are the applications of ferrosilicon powder?

A: Ferrosilicon powder is mainly used in the steel-making industry. Putting a certain proportion of ferrosilicon powder in molten steel can play a role in rapid deoxidation, which can effectively save the time and cost of deoxidization, and greatly improve the quality of the finished steel. The cost of the enterprise, not only that, the ferrosilicon powder also has the application of slag-collecting agent, which can effectively aggregate the oxides in molten steel and effectively filter impurities in the molten steel to improve the purity of molten steel!

Q: What are the uses of ferrosilicon?

A: This product has many applications in steel production and casting. It contributes an increase in hardness and deoxidising properties but also with an improvement in strength and quality of iron steel products. Using it to manufacture inoculants and nodularisers can give specific metallurgical properties to the final products produced, which can be:
Stainless steel: for superior corrosion resistance, hygiene, aesthetic and wear-resistance qualities.
Carbon steels: used extensively in suspension bridges and other structural support material and in automotive bodies.
Alloy steel: other types of finished steel.
In fact, high-purity products are used in the production of grain-oriented (FeSi HP/AF Specialty Steel) and non-oriented electrical sheet and specialty steels requiring low levels of aluminium, titanium, boron and other residual elements.
Whether used for deoxidizing, inoculating, alloying, or as a source of fuel, our quality ferrosilicon products have stood the test of time.

Q: What is ferro silicate?

A: Ferrosilicon (FeSi) is an alloy of iron and silicon with a very variable silicon content between 10% and 90%. It is used as a so-called master alloy in steel production, which is added in small amounts in order to adjust the properties of the melt, the cooling process and the finished product.

Q: What is iron silicon used for?

A: Ferrosilicon (FeSi) is an alloy of iron and silicon that is principally used in steelmaking for deoxidation and as an alloying component. Elkem is one of the largest suppliers of premium-grade ferrosilicon ferroalloys worldwide, and we’re ready to help you identify the best product for your application.

Q: What is another name for ferrosilicon?

A: Ferrosilicon, or ferrosilicium, is a ferroalloy an alloy of iron and silicon with between 15 and 90% silicon. It contains a high proportion of iron silicides. Its melting point is about 1200 °C to 1250 °C with a boiling point of 2355 °C. It also contains about 1 to 2% of calcium and aluminium.

Q: What is the difference between silicon and ferrosilicon?

A: Silicon metal is also used as an alloying agent in the production of aluminum and steel. Uses: Ferro silicon is primarily used as an additive in steelmaking and cast iron production. It is added to molten iron to improve its properties such as strength, hardness, and resistance to corrosion.

Q: Where does ferro silicon come from?

A: It contains a high proportion of iron silicides. Ferrosilicon is produced by reduction of silica or sand with coke in presence of iron. Ferrosilicon is known to possess good resistance to abrasion, good resistance to corrosion, high specific gravity, and high magnetism, which allows easy magnetic recovery.

Q: What are the raw materials for ferro silicon?

A: Main raw materials for Ferro Silicon production are quartz, charcoal and mill scale. Quartz contains chemical gangue besides the conglomerates of surface sticking mud coat and earth materials which contributes for slag forming tendencies.

Q: Where is ferrosilicon produced?

A: Excluding the United States, ferrosilicon accounted for almost 70% of world silicon production on a silicon-content basis in 2021. The leading countries for ferrosilicon production were, in descending order and on a silicon-content basis, China, Russia, and Norway.

Q: Is ferrosilicon strong?

A: The chemical affinity between silicon and oxygen is very large. Therefore, ferrosilicon is a strong deoxidizer for steelmaking for precipitation and diffusion. deoxidation. Adding a certain amount of silicon to the steel can significantly improve the strength, hardness and elasticity of the steel.

Q: Is ferro silicon a metal?

A: Ferrosilicon appears as a solid alloy of iron and silicon. Used to add silicon to iron and steel. Ferrosilicon is an odorless, crystalline solid metal. It is flammable and can react explosively with oxidizing materials. In the presence of moisture or water it may emit toxic and explosive fumes. It is used in magnesium processing.

Q: What is the demand for ferrosilicon?

A: The ferrosilicon market is projected to reach USD 12.9 billion by 2028, at a CAGR of 3.4% from USD 10.9 billion in 2023. Ferrosilicon serves as a vital component in various industrial sectors, particularly the steel and iron industry. With silicon content ranging from 15% to 90%, ferrosilicon plays a crucial role in enhancing the quality and properties of steel through its unique characteristics. In the steel manufacturing process, it acts as a powerful deoxidizer, effectively eliminating oxygen from the molten steel and consequently improving its overall quality and performance.

Q: What are the grades of ferrosilicon?

A: Ferrosilicon is an alloy of iron and silicon containing 15 to 95 percent silicon and used for deoxidizing molten steel and making silicon steel and high-silicon cast iron. Ferrosilicon is produced by reducing the level of silica, or sand, through mixing coke with iron. Typical sources of iron are millscale, or from recycling scrap iron. Ferrosilicons with silicon weight content up to about 15% are made in blast furnaces lined with acid fire bricks while higher weight content are made in electric arc furnaces. The usual grades on the market are ferrosilicons with 45%, 65%, 70%, and 75% silicon. The remainder is iron, with about 2% consisting of other elements like aluminum and calcium.

Q: What is the solubility of ferrosilicon?

A: Fe-Si may slowly produce hydrogen (H2) when it comes in contact with water. The dust of Fe-Si is soluble in water with the solubility of 0.015 milli grams Si per litre at pH of 5.8-5-9 and temperature of 20 deg C. Toxic and flammable gases are produced when this alloy reacts with moisture, bases and acids.

Q: What is the by product of the silicon and ferrosilicon industries?

A: Silica fume (SF) is a byproduct of the smelting process in the silicon and ferrosilicon industry. The reduction of high-purity quartz to silicon at temperatures up to 2000 °C produces SiO2 vapours, which oxidizes and condense in the low-temperature zone to tiny particles consisting of non-crystalline silica.

Q: What materials are replacing silicon?

A: Gallium Arsenide (GaAs): GaAs is a compound semiconductor that has higher electron mobility than silicon, enabling faster switching speeds and higher-frequency operation. It is particularly suitable for high-speed applications such as radio-frequency (RF) amplifiers and telecommunications devices.

Q: What can replace silicon in semiconductor?

A: Carbon nanotubes: These are small tubes made of carbon atoms that have unique electrical properties, making them ideal for use in semiconductors. Graphene: This is a single layer of carbon atoms arranged in a hexagonal lattice, which has excellent electrical and thermal conductivity.

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