Ferro Silicon

China Professional Ferro Molybdenum Manufacturer&Supplier

ZHEN AN INTERNATIONAL CO., LIMITED

Complete Production Facilities

We Have 4 sets of production lines for ferroalloy of 20,000 TPY; 4 sets of production lines for Alloy cored wire of 30,000 TPY; 6 sets of vacuum furnaces; and 10+ sets of furnaces for other purposes.

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Our personalized services allow us to find the solution most suitable for you. Specific parameters, Dimensions, and Packaging of Products can be customized.

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We have our own laboratory. After the goods are produced, random samples are taken and tested for element content to ensure there are no quality problems. We follow strict testing & quality check parameters, ensuring 100% customer satisfaction.

Export Business Veteran

We have 30+ years of supply experience in the Chinese domestic market and international markets. We have rich experience in exporting to foreign countries.

What Is Ferro Silicon?

Ferrosilicon is a kind of ferroalloy made by smelting in an electric furnace with coke, steel scraps, and quartz (or silica) as raw materials. Ferrosilicon is classified according to the silicon content, such as FeSi45, FeSi75, FeSi65, etc.

We are ferro silicon manufacturer & supplier in China, we can provide ferro silicon 45, ferro silicon 65, ferro silicon 70, ferro silicon 72, and ferro silicon 75.

Grade	≥	(Chemical composition)≤ %
	Si	Al	Ca	Mn	Cr	P	S	C
FeSi75	75	1.5	1	0.5	0.5	0.04	0.02	0.2
FeSi72	72	2	1	0.5	0.5	0.04	0.02	0.2
FeSi70	70	2	1	0.6	0.5	0.04	0.02	0.2
FeSi65	65	2	1	0.8	0.5	0.04	0.02	0.2
FeSi45	45-47	2	1	0.8	0.5	0.04	0.02	0.2
Size	10-50mm, 0-3mm, 1-3mm, 0-10mm or as your requirement or according to customers' requirements;

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What Are The Shapes Of Ferro Silicon

The shape of ferrosilicon is Ferro Silicon Lumps, Ferro Silicon Briquette, Ferro Silicon Slag, Ferro Silicon Granules, Ferrosilicon Powder

Ferro Silicon Lumps

FeSi Lumps are an essential deoxidizer in the steelmaking industry. In steelmaking, Iron Silicon is used for precipitation and diffusion deoxidation.

Ferro Silicon Granules

Ferrosilicon granules are formed by crushing ferrosilicon into small pieces of a certain proportion and filtering them through a sieve with a certain mesh size. In simple terms, ferrosilicon granules are small particles that are crushed and screened from natural ferrosilicon blocks and standard blocks according to various particle sizes. Ferrosilicon granules are mainly used as inoculants in foundries.

Ferrosilicon Powder

Ferrosilicon powder is a powder made by grinding ferrosilicon, which plays a very important role in steelmaking.
Ferrosilicon powder is usually used as a deoxidizer and alloying agent for smelting silicon steel in the steelmaking process.

How to make ferro silicon?

Raw material preparation: Select high-purity silicon and iron ore as raw materials. Silicon ore is processed by crushing, grinding, etc., and iron ore is processed by crushing, magnetic separation, etc.
Mixed smelting: The processed silicon ore and iron ore are mixed in a certain proportion and then put into a high-temperature electric furnace for smelting. During the smelting process, a certain amount of coke is added as a reducing agent to reduce the iron oxide in the iron ore to metallic iron.
Alloy adjustment: During the smelting process, the silicon content of ferrosilicon is adjusted as needed. This can be achieved by adding an appropriate amount of silica or other alloys with a high silicon content.
Cooling out of the furnace: After the smelting is completed, the molten ferrosilicon is poured into the mold and taken out after cooling and solidification.

What Is The Difference Between Silicon Metal And Ferrosilicon?

1. Selection And Preparation Of Raw Materials
The main raw materials of silicon metal are quartz stone and coke, in which quartz stone needs to be crushed and washed to get quartz sand that meets the requirements. The main raw materials of ferrosilicon are silica ore, metallurgical silicon and scrap iron, etc. The beneficiation process of silica ore is more strict. In addition, the silicon content of the two alloys is not the same, the silicon content of silicon metal is generally more than 99%, while the silicon content of ferrosilicon is about 70%.

2. Charge Ratio
The charge ratio of silicon metal is relatively simple, usually a certain proportion of quartz sand and coke. On the other hand, the charge ratio of ferrosilicon has to take into account the needs of different ferroalloys, usually including silica ore, metallurgical silicon, scrap steel miscellaneous iron, and other components. Ferrosilicon is also mixed with a certain proportion of limestone and dolomite, which is used to regulate the furnace temperature and improve processes such as slag desulphurization.

3. Smelting Process
Silicon metal is usually smelted by the electric furnace method, the furnace temperature is higher, and the ore and coke react in the furnace to produce silicon metal. Ferrosilicon is usually smelted by blast furnace method or electric furnace method. The blast furnace method has the advantages of continuity and stability, and is suitable for mass production; the electric furnace method is suitable for small batch or special quality requirement production.

4. Product characteristics
Silicon metal has the characteristics of high purity, high melting point, and low impurity, which are widely used in high-tech fields such as photoelectricity and semiconductors. Ferrosilicon, on the other hand, has low silicon content and high iron content and is mainly used in iron and steel smelting and casting industries, where it can play the roles of desulphurization, enhancement of hardness and strength, and so on.

5. Application
The main application areas of silicon metal are semiconductors, photovoltaic cells, solar energy, and other high-tech industries. Ferrosilicon is mainly used in the iron and steel manufacturing and casting industry, which is widely used in vehicle manufacturing, machining, construction, and other fields.

What Is Ferrosilicon Used For?

(1) Ferro Silicon Alloy is Used as a deoxidizer and alloying agent in the steel-making industry. In order to obtain the chemical composition of qualified steel and ensure the quality of steel, in the final stage of steelmaking must be deoxidized, silicon and oxygen between the chemical affinity is very large, and thus ferrosilicon is a strong deoxidizer for steelmaking for precipitation and diffusion deoxidisation.

(2)Ferro Silicon Inoculant Used as inoculant and spheroidising agent in cast iron industry. Add a certain amount of ferrosilicon in cast iron can prevent the formation of carbides in iron, and promote the precipitation of graphite and spheroidisation, and thus in the production of ductile iron, ferrosilicon is an important inoculant (to help precipitate graphite) and spheroidising agent.

(3)Fe Silicon is Used as a reducing agent in ferroalloy production. Not only is there a great chemical affinity between silicon and oxygen, but high silica ferrosilicon has a very low carbon content. Therefore, high silica ferrosilicon (or siliceous alloy) is a kind of reducing agent commonly used in the production of low-carbon ferroalloys in the ferroalloy industry.

(4)75 Ferrosilicon in the Pidgeon process of refining magnesium is often used in the high-temperature smelting process of magnesium metal to replace the magnesium in CaO. MgO, and every tonne of magnesium metal to be produced will consume about 1.2 tonnes of ferrosilicon, which plays a great role in the production of magnesium metal.

(5)China Ferrosilicon Uses in other aspects. Grinding fine or atomization processed ferrosilicon powder, in the mineral processing industry can be used as a suspension phase. It can be used as a coating for welding rods in the welding rod manufacturing industry. High-silicon ferrosilicon can be used in the chemical industry to manufacture products such as silicone.

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FAQ

Q: How is ferro silicon produced?

A: The production of ferro silicon involves the reduction of sand or silica (Si) with coke/coal (C), and then reacting it with iron (Fe) which can be obtained from scraps. This process will usually happen blast furnace or electric arc furnace. The carbon in the coal is necessary to remove the oxygen, leaving a clean Silicon and Iron product as result. The perfect chemical composition needs to be reached to achieve ferrosilicon products with the desired densities and in the right grades.

Q: What are the specifications and grades of ferro silicon?

A: The usual chemical composition of ferro silicon is a Silicon content of 15%, 45%, 75%, or 90%. Most of the remaining compounds are made up of iron, with about 2% of other elements, usually aluminum, and calcium.

Q: Is ferro silicon toxic?

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

Q: How should you store ferro silicon?

A: First ensure all containers are properly closed when being stored. The ferro silicon containers should be kept in a dry and well-ventilated area.

Q: How is ferro silicon used in diamond processing plants?

A: Ferro silicon 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. Ferro silicon 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 is the percentage of silicon in ferro silicon?

A: Ferro silicons 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 aluminum and calcium.

Q: What is the composition of ferro silicon slag?

A: The slag is heterogeneous, consisting of silicate-based melts (48% to 50% SiO2, 20% to 25% Al2O3, 15% to 18% CaO), suspension of silicon carbide (10% to 15%), and the metallic inclusions of ferro silicon alloy.

Q: What is ferro silicon?

A: Basically, Ferrosilicon (FeSi) is a ferroalloy of silicon and iron. The ratio in which the silicon and iron substances are combined differs, with the weight percentage of silicon ranging between 15% and 90%.

Q: What is the purpose of ferro silicon?

A: Ferro silicon (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: Is ferro silicon used in semiconductors?

A: Ferro Silicon (FeSi): Ferro silicon, being an alloy primarily composed of iron and silicon, is tailored for entirely different applications, such as steel production and silicon-based alloy manufacturing. Its iron content sets it apart from elemental silicon, making it unsuitable for semiconductor use.

Q: What are the raw materials for ferro silicon production?

A: The 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: Why does the ferro silicon smelting process need stoking?

A: With the extension of smelting time, furnace conditions will change. This is because it is difficult for the reaction to reach an equilibrium state due to the loss of the generated gaseous SiO in the reaction zone, that is, an excess of SiC is inevitable. The SiC remaining in the furnace forms the crucible wall around the electrode, and the crucible wall becomes thicker as the amount of SiC aggregate increases. The air permeability of the material surface deteriorates, and the material surface stab fire or even serious stab fire occurs, that is, SiO and CO are concentrated from the local part of the material surface. When the material is discharged, the conductivity of the material layer increases, the electrode is lifted, the tapping flow is reduced, the tapping time is long, and the technical and economic indicators of smelting have deteriorated. In this case, it is necessary to carry out a pounding operation to destroy the excessively thick crucible wall, replenish new materials, increase the resistance of the material layer, improve the gas permeability of the material surface, promote the deep insertion of electrodes, and improve the furnace condition.

Q: What are the applications of ferro silicon in the field of environmental protection?

A: In recent years, ferro silicon has also shown potential application value in the field of environmental protection. Ferro silicon can be used as an adsorbent to treat heavy metal ions and organic pollutants in wastewater. Its high specific surface area and activity enable ferro silicon to effectively adsorb and remove these harmful substances, thereby purifying water quality. In addition, ferro silicon can also be used to produce environmentally friendly refractory materials for emission control and energy conservation, and emission reduction in high-temperature industries.

Q: What are the applications of ferro silicon in electrical materials?

A: Ferro silicon is widely used in the field of electrical materials. Due to its high resistivity and good magnetic properties, ferro silicon is often used as a resistance material, magnetic core materials, and electromagnets. Ferro silicon's resistivity makes it an ideal material for resistors and potentiometers, while its magnetic properties make it important in electromagnetic devices.

Q: Is ferro silicon flammable?

A: Ferro silicon 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.

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