Silicon Manganese

Take Your Business to the Next Level with Wholesale Silicon Manganese from Anyang Kongfang

As a professional Silicon Manganese supplier, our company was established in 2006 with more than 12 years of export experience. In the fierce market competition, our advantages are reflected in:

Strong Team

Our factory covers an area of about 30,000 square meters and currently has more than 140 employees, including more than 15 professional and technical personnel of various types. They can provide you with reliable technical support and considerate services in every aspect of cooperation.

Broad Market

Kongfang products are sold both domestically and abroad. It has exported ferro alloys to more than 20 countries such as Netherlands, Italy, South Korea, Japan, Russia, India, Turkey, Pakistan, Indonesia, Vietnam, Myanmar etc. thus earning a favorable reputation internationally.

Wide Product Range

Explore our extensive product range, featuring high-quality alloys and metals such as Ferro silicon, Silicon manganese, Silicon carbon alloy, Ferro chrome, Silicon metal, Ferro manganese, Silicon carbide, Calcium silicon, Nitrided Ferrosilicon, Silicon slag, Ferro silicon barium, Ferro boron, Manganese metal, Electrolytic manganese metal, and Calcium silicon cored wire etc. Our diverse selection ensures that we meet the diverse needs of our customers across various industries.

Professional Service

Our professional sales team can provide first-class services in addition to 100% quality assurance for customers. We also provide good after-sales service to handle customer complaints and solve problems for customers. We will be responsible for any quality issues.

Anyang KongFang Metallurgical New Material Technology Co., Ltd

Brief Introduction to Silicon Manganese

Silicon manganese is composed of manganese, silicon, iron alloy, and a small amount of carbon and other elements. This material has a wide range of uses. It is often used as a composite deoxidizer and is also the main raw material for low-carbon ferro manganese and silicothermal production of metallic manganese. Silicon-manganese alloy is produced by reducing manganese oxide in manganese ore (including manganese-rich slag) and silica in silicon dioxide with carbon in a submerged arc furnace.

Features of Silicon Manganese

High Strength to Weight Ratio

One of the main characteristics of silicon manganese is its high strength-to-weight ratio. This means that, although the alloy has high tensile strength, it is lightweight. Therefore, it is easy to transport and install without worrying about additional structural support. This makes it ideal for use in bridge construction, where weight and strength are both important considerations.

Good Corrosion Resistance

Due to its composition, silicon manganese also has good corrosion resistance. The presence of iron in the alloy helps prevent rust or oxidation, which is especially useful when building structures in areas with high humidity or exposure to salt water. Additionally, the presence of silicon helps form a protective oxide layer on the surface, further enhancing corrosion resistance.

Heat Resistance

The presence of manganese in silicon manganese also helps improve its heat resistance. Manganese helps reduce grain growth during heating by forming more stable carbides than other elements such as aluminum or titanium form under similar conditions. This makes silicon-manganese steel ideal for high-temperature applications such as welding or forging.

Various Forms

Silicon manganese can be made into many forms, such as powder, block, etc. Moreover, these materials are carefully screened and have a high degree of purity. The manganese content inside it can also be adjusted.

Benefits of Silicon Manganese

Silicon manganese mainly contains two elements, silicon and manganese, which can exert many advantages and benefits during use.

Rapid Deoxygenation
Manganese is one of the most important deoxidizers in the steelmaking process. Almost all grades of steel require manganese for deoxidation because the oxygen products produced by manganese deoxidation have low melting points and tend to float. Manganese can also enhance the deoxidation effect of strong deoxidizers such as silicon and aluminum.

Efficient Desulfurization
All industrial steels need to add a small amount of silicon manganese as a desulfurizer to prevent the steel from breaking during hot rolling, forging and other processes.

Improve the Strength of Steel Structure
Manganese is also the most important alloying element in various steel grades. In order to improve the structural strength of steel, 15% manganese is also added to alloy steel. Silicon is the most important alloying element in pig iron and carbon steel after manganese. In steel metallurgy, silicon is mainly used as a deoxidizer for molten metal or as an alloy additive to increase the strength of steel and improve its properties.

Promote Graphitization of Carbon
Silicon is also an effective graphitizing medium, converting the carbon in cast iron into free graphitic carbon. The amount of silicon added to standard gray cast iron and ductile iron can reach 4%. Large amounts of manganese and silicon are added to the molten steel in the form of iron alloys such as ferromanganese, silicomanganese and ferrosilicon.

Silicon Manganese Specification (Taking Si Silicon Manganese as an Example)

	Mn	Si	C	P	S


65/17	65	17	2	0.25	0.04
60/14	60	14	2.5	0.3	0.05

Production of Silicon Manganese

Equipment

Silicon manganese is produced by carbothermal reduction of oxidized raw materials in a submerged electric furnace. The same type of furnace is used to produce FeMn and SiMn alloys. SiMn processes are generally more difficult to operate than FeMn processes because higher process temperatures are required. SiMn furnace capacities typically range from 15-40 MVA and produce 80-220 tons of alloy per day.

Raw Materials

Standard silicon manganese containing 18-20% Si and approximately 70% Mn is produced from a mixture of HCFeMn slag with approximately 35% to 45% MnO, manganese ore, quartzite, (Fe)Si remelt or reject, and coke. Small amounts of minerals containing magnesium oxide are sometimes added. The waste residue from the SiMn process typically contains 5% to 10% MnO. Low-carbon silicon manganese, containing about 30% silicon, is produced by upgrading standard alloys by adding silicon scrap from the ferrosilicon industry.

Impurity Content

Manganese ore often contains unwanted elements that cannot be removed during the mining and processing stages. Of particular importance is phosphorus, since there are strict requirements for the element phosphorus in FeMn and SiMn alloys. Iron, phosphorus and arsenic are more easily reduced than manganese and therefore enter the metal first. Therefore, the selection of ores must control their content in the final alloy. HCFeMn slag is a very pure source of manganese because easily reducible impurities in the ore have been absorbed by the HCFeMn metal in previous process steps. Therefore, the content of impurities such as phosphorus in SiMn alloys can be controlled not only by the selection of manganese ore, but also by the relative contents of manganese ore and HCFeMn slag in the raw material mixture.

Process Temperature

In order to obtain a metal with a sufficiently high Si content and a waste residue with a low MnO content, a process temperature of 1600 to 1650°C is required. Compared to manganese ore, ferromanganese slag has a relatively low melting temperature (approximately 1250°C). Therefore, a high proportion of FeMn slag tends to result in lower process temperatures. When manganese ore begins to melt at around 1350°C, it will contain a mixture of solid and liquid phases, with the solid phase being MnO. Before the molten ore can be mixed with slag and flow freely, it needs to be further heated and reduced to 1550°C or higher. Due to the higher proportion of manganese ore in the mixture, the surface and process temperatures in the coke bed area will be higher.

Energy Consumption

The specific energy consumption for producing standard SiMn from a mixture of manganese ore, HCFeMn slag and silicon-rich metal remelt is typically 3500-4500 kWh/ton of metal, depending first on the amount of metal added to the feed. Electricity consumption will increase with the silicon content of the metal produced and the amount of slag per ton of silicon manganese. For every additional 100 kilograms of slag, approximately 50 kilowatt hours of additional electricity will be consumed. If the ore in the charge is partially reduced to MnO by CO gas rising from the smelting reduction zone, approximately 100 kWh and some coke will be saved per ton of metal.

Silicon Manganese Uses in Steel Industry

Production of Steel

Silicon manganese is an alloy of silicon, manganese and iron. It is used as a deoxidizer, desulfurizer and an alloying element in the production of steel. The addition of silicon manganese to steel increases its strength and hardness, while also improving its resistance to wear and tear.

Production of Cast Iron

Silicon manganese can also be used in the production of cast iron. In this process, the silicon manganese is added to molten iron, which helps to remove impurities and improve the quality of the final product.

Production of Wrought Iron

Wrought iron is another type of iron that can be made using silicon manganese. In this process, the silicon manganese is added to molten iron, which helps to remove impurities and improve the quality of the final product.

Production of Stainless Steel

Stainless steel is another type of steel that can be made using silicon manganese. In this process, the silicon manganese is added to molten steel, which helps to remove impurities and improve the quality of the final product.

Production of Tool Steel

Tool steel is another type of steel that can be made using silicon manganese. In this process, the silicon manganese is added to molten steel, which helps to remove impurities and improve the quality of the final product.

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Frequently Asked Questions

Q: What is the formula for silicon manganese?

A: Silico-manganese (Si-Mn) is a metallic ferro alloy which is being used to add both silicon (Si) and manganese (Mn) as ladle addition during steelmaking.

Q: What is the effect of silicon manganese?

A: Manganese and silicon have opposing effects on the carbon concentration range where peritectic behavior and shell growth non-uniformity occurs in plain carbon steels containing high levels of Mn and Si.

Q: Is silicon manganese hazardous?

A: Dust-free, fold Silicomanganese in lumps is not a health hazard when properly handled and stored. Inhalation of Manganese vapour oxide fumes can result in acute chemical pneumonia (manganese fever). On prolonged exposure: Danger of chronic manganese poisoning with damage to the central nervous system.

Q: What are the raw materials of silicon manganese ferro alloy?

A: The production of silicon manganese ferro alloy uses manganese ore, quartz and iron ore as raw materials. Copper smelting slag is rich in iron and silicon and is therefore an attractive alternative to quartz and iron ore in ferro silicon production.

Q: What is the demand of silicon manganese?

A: The global Silicon Manganese market size was valued at USD 20384.87 million in 2022 and is expected to expand at a CAGR of 5.92% during the forecast period, reaching USD 28786.48 million by 2028.

Q: What is the difference between ferro manganese and silicon manganese?

A: The key difference between ferro manganese and silicon manganese is that ferro manganese is a type of manganese alloy containing manganese and iron along with some amount of carbon, whereas silicon manganese contains silicon and manganese along with some amount of carbon.

Q: How is silicon manganese made?

A: Silicon manganese is produced by silico-thermic reduction, in electric submerged-arc furnaces, using manganese ores and/or slags from the production of ferro-manganese.

Q: How does silicon manganese improve the properties of steel?

A: Silicon manganese improves the properties of steel by increasing its hardness, wear resistance and overall properties, making it suitable for a variety of applications.

Q: Why is silicon manganese added to carbon steel?

A: When iron ore (a compound of iron and oxygen) is converted into iron, the manganese element in silicomanganese removes oxygen and sulfur, helping to convert the iron into steel.

Q: What is the role of silicon in silicon manganese on steel?

A: Silicon is a stronger deoxidizer and also helps improve some of the mechanical properties of steel.

Q: Can silicon manganese be used in other industries besides steelmaking?

A: Yes, silicon manganese can be used in non-ferrous metallurgy and in the production of certain types of aluminum alloys. It is also used in the manufacturing of silicon in the electronics industry.

Q: What are the typical proportions of silicon and manganese in Silicon Manganese?

A: There are around 68% manganese and 14-16% silicon in standard silicon manganese steel alloys.

Q: Is silicon manganese expensive compared to other alloys?

A: Compared with other alloying elements, silicon and manganese are relatively abundant, so the manufacturing cost of silicon manganese is lower and the price is cheaper than other alloys.

Q: Can silicon manganese slag be recycled?

A: Yes. Silicon manganese slag is a solid waste discharged from a silicon manganese alloy smelting furnace. Since these waste slags contain a certain amount of silicon manganese alloy, they can be recycled.

Q: Will silicon manganese affect the conductivity of steel?

A: Yes, the silicon in silicon manganese will increase the magnetic permeability and resistance of steel, and on the contrary will increase the electrical conductivity.

We're professional silicon manganese manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to buy high-grade silicon manganese at competitive price from our factory.

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