Karbon Yükseltici Ne Kullanır?

In modern industry, the precise control of carbon content is one of the key factors determining product performance. Carbon raiser can control the carbon content in the metal melt, improving the performance of the material, thus having a direct impact on product quality and production efficiency. So it is widely applied in fields such as steel smelting, precision casting, refractory materials, and high-end carbon materials.

What is a carbon raiser?

Carbon raiser belongs to a category of industrial materials with carbon as the main component, which production process involves processing and treating raw materials with high carbon content such as petroleum coke and graphite. The carbon content is usually over 90%, and for high-end products, it can reach over 98%. According to the raw materials and processing methods, they can be classified into types such as kalsine petrol kok kömürü, graphitization, and natural graphite.

With the different purity and ash content, it is suitable for various industrial scenarios. Its core function is to replenish carbon elements into the molten metal. It can compensate for the carbon loss caused by the melting and oxidation of raw materials during the smelting process. Then adjusting the carbon content to the target range, and ensuring that the metal’s strength, hardness and other properties meet the standards. And some high-quality carbon additives also have the characteristics of low impurities and easy absorption. These enables it to reduce harmful residues and minimize production defects.

Applications of carbon raisers

In the steelmaking industry

In the steelmaking process

Carbon raiser is usually used during the steelmaking processes in converters and electric arc furnaces. Because the carbon content of raw materials such as scrap steel and pig iron often fails to meet the requirements of the target steel type. Because the carbon content of raw materials such as scrap steel and pig iron often fails to meet the requirements of the target steel type. This ensures that low-alloy steel has sufficient carbon to guarantee strength, while high-carbon steel enhances hardness.

The requirements for carbon raiser are different depending on the type of steel. Common carbon steel is mostly treated with calcined petroleum coke as a carbon raiser. With a carbon content of 90% to 95%, this kind is cost-effective and stable. High-quality alloy steel (such as bearing steel) requires graphite-based carbon raiser. Its carbon content is over 98% and sulfur content is less than 0.05%, which can reduce the impact of impurities on toughness. At the same time, the carbon raiser can promote the flotation of non-metallic inclusions in the molten steel. This reduces pores, cracks and other defects, and improves the purity of the steel billet.

In cast iron production

Carbon raisers are essential auxiliary materials in cast iron production, because its performance is directly related to the carbon content. Under normal conditions, the carbon content of cast iron ranges from 2.11% to 6.69%. For gray cast iron, it needs to be 3.0% to 3.6%, and for ductile cast iron, it needs to be 3.6% to 3.8%.

During smelting, it can replenish the carbon lost due to the combustion of coke and the oxidation of iron materials. This ensures that the carbon content of the molten iron meets the standards. It can also control the form of carbon, which are used in the production of ductile cast iron. It can promote the carbon to precipitate as spherical graphite (instead of sheet-like), enhancing strength and toughness. This makes the cast iron have both wear resistance and ductility, and you can widely use it as key components.

In the foundry industry

To adjust the carbon equivalent of molten iron

Carbon equivalent is a key indicator for measuring the fluidity and solidification characteristics of molten iron, which is mainly used to evaluate the casting properties. If it is too high, it may cause graphite floating defects in the molten iron. While too low carbon equivalent will result in poor fluidity and cause problems such as insufficient pouring and cold shuts.

Carbon raiser can precisely supplement the carbon content, controlling the carbon equivalent of the molten iron within a reasonable range of 2.8% to 4.2%. This ensures smooth filling during casting and reduces solidification defects. In the production of gri dökme demir parts, you can add an appropriate amount of calcined petroleum coke as a carbon raiser. This can raise it to 3.6% to 3.8% and then perfectly fill the cavities of complex cast parts such.

To improve the quality of castings

Carbon raiser enhances the quality of castings in multiple aspects:

Stabilize the carbon content

It ensures uniform properties such as hardness and wear resistance of the castings, thereby reducing waste caused by fluctuations in composition

Improve cutting performance

The carbon elements in high-quality carbon raiser tend to form fine and uniform graphite particles, which can “lubricate” the cutting tools. After adding it into the machine tool castings, it can reduce wear and improve processing efficiency.

Reduce defects

With the low sulfur and low nitrogen characteristics, it can reduce the occurrence of pores and shrinkage in the castings. Then it can significantly increase the product qualification rate in precision casting of automotive transmission gears and other components.

Other industrial applications

In the production of refractory materials

The carbon element content determines whether the refractory material can remain stable at temperatures above 1500℃. It can enhance its high-temperature resistance and corrosion resistance, so carbon raiser are often added when producing carbon composite refractory materials. After forming and sintering, it can enhance the thermal conductivity and oxidation resistance of the material.

After adding 5% to 10% carbon raiser to the aluminum-carbon refractory bricks, the high-temperature resistance of the material increases by more than 30%. This reduces the erosion by molten iron and slag, and prolongs the lifespan of the yüksek fırın. In the refractory coating of the continuous casting steel mold, adding it can reduce the adhesion to the molten steel. Thus avoiding scratches on the surface of the cast billet.

In the chemical and carbon materials fields

Kimya endüstrisinde

It can react with metal oxides at high temperatures to form compounds, which are important raw materials for abrasives and ceramic materials. For example, the carbonized silicon produced by its reaction has the high hardness and high temperature resistance. So you can use it in sandpaper, grinding wheels, and the structures of high-temperature kilns.

In the field of high-end carbon materials

High-purity carbon raiser is an important material for preparing graphene and carbon nanotubes. Because it can be reorganized into nano-carbon structures through chemical vapor deposition. With the excellent electrical conductivity and mechanical properties, you can use it in lithium battery electrodes, chip heat dissipation films, and other applications. Additionally, carbon raisers can be activated to produce porous activated carbon. And you can use it in environmental protection scenarios such as wastewater treatment and gas adsorption.

Sonuç

Because of its characteristics such as high carbon content, low impurities, and easy regulation, carbon raiser can help replenish carbon. It controls carbon content in industrial production and  drives the innovation of high-performance materials. But as industrial upgrading progresses, the performance requirements for it increase, such as reducing carbon emissions. And in the future, its purity and applicability need to be enhanced through process innovation.