Detailed introduction to silicon carbon alloys

Silicon carbon alloy is a new type of alloy used in converter, which can replace ferro silicon, silicon carbide, carburizing agent, reduce the amount of deoxidizing agent, and is used in converter smelting deoxidizing alloying process. Silicon carbon alloy block is a kind of deoxidized alloy in converter smelting, the effect is stable, and the chemical composition, mechanical properties and internal control quality of steel are better than the traditional process.

The experiment and production practice show that the use of silicon carbon alloy in the converter deoxidizing alloy process can greatly reduce the cost of steelmaking per ton of steel, create considerable economic benefits, and improve the market competitive advantage of steel. Usage: Manual direct input or automatic addition to the bottom of the ladle through the bin chute: such as refining can also be added directly in the refining process. Different indexes and amounts of addition are selected according to different steel grades. (The carbon content can be adjusted according to different steel grades to meet the needs of different steel grades).

Silicon carbon alloy features:

Silicon carbon alloy has stable properties. It can improve the quality of molten steel, improve the quality of products, improve the new energy of products, reduce the amount of alloy added, reduce the cost of steelmaking, and increase economic benefits. For a long time, the converter alloy has not been adjusted, the traditional alloy variety structure is relatively simple, that is, Q195, Q235 steel using Mnsi+FeSi+SiAiCaBa+Sic+ carburizer process, HRB335, HRB400 steel using MnSi+Fesi+AiSi+ carburizer production process. The traditional silicon manganese alloy, ferro silicon resources are increasingly tight, and the market price is rising all the way, making the cost of converter steelmaking gradually increase, reducing the profit space of steel, and the recovery rate of traditional alloy is greatly affected by the converter operation, the steel output, the end temperature and the amount of slag make the alloy composition of the finished product fluctuate greatly. The chemical composition of the smelting steel is unstable, and the qualified rate of the internal control index of the finished product is low.

It can be seen from the use of silicon carbon alloy in the replacement of some alloys have great advantages, steel mills demand for silicon carbon alloy is also increasing, so silicon carbon alloy prospects are promising. The optimization of silicon carbon alloy variety structure is conducive to the reduction of production costs. Improve the quality of molten steel. Reduce the amount of alloy added and adjust the main alloy.

The main components of silicon carbon alloy

Silicon carbon alloy is a kind of alloy material composed of silicon, carbon and a small amount of aluminum, calcium, iron and other elements. Among them, the silicon content is usually 50% to 70%, and the carbon content is usually 10% to 30%. The higher the silicon content, the wider the application range of silicon carbon alloy, but also the higher the price of the alloy. Silicon carbon alloy also contains some trace impurities, such as manganese, phosphorus, sulfur and so on. The content of these elements has a certain influence on the quality and properties of silicon carbon alloy.

Application of silicon carbon alloy

Silicon carbon alloy is widely used in metallurgy, chemical industry, electronics, aviation and other fields. It mainly includes the following aspects:

1. Metallurgical field: silicon carbon alloy can be used as a deoxidizer and alloying agent in steel production, which plays an important role in optimizing steel structure and improving steel properties.
2. Casting field: silicon carbon alloy can improve the hardness and mechanical properties of casting parts, suitable for a variety of casting alloys.
3. Chemical industry: silicon carbon alloy is an important chemical raw material, which can be used to prepare silicone polymers, silicone materials, etc.
4. Electronics industry: silicon carbon alloy is an important raw material for manufacturing semiconductor materials, which can be used to manufacture solar cells, LED and so on.
5. Aviation field: silicon carbon alloy can be used to manufacture high-strength, high-temperature corrosion resistant aviation materials.

In short, silicon carbon alloy is an important alloy material and has a wide range of application prospects. In the future development, the research and development and application of silicon carbon alloy will be more extensive.

In the production of stainless steel by KOBMS converter, a certain amount of reducing agent needs to be added after the beginning of the reduction period to reduce the metal oxides entering the slag during the oxygen blowing smelting period. The deoxidation reduction method of converter smelting stainless steel is to use ferro silicon or ferro silicon plus aluminum as reducing agent. Silicon-carbon alloy has a strong reduction capacity, and the price of ferro silicon is high, which correspondingly increases the manufacturing cost of stainless steel. In order to overcome the above shortcomings of the existing deoxidation reduction method of stainless steel smelting by converter, silicon carbon alloy is a low cost deoxidation reduction method of stainless steel smelting by converter.

Types of silicon carbon alloys

Silicon carbon alloy is divided into silicon carbon alloy block, silicon carbon alloy ball

Silicon carbon alloy block is a converter alloy that can replace ferro silicon, silicon carbide, carburizer, and a small amount of deoxidizer. Silicon carbon alloy block as a converter smelting deoxidized alloy, the effect is stable, the chemical composition of steel, mechanical properties, internal control quality are better than the traditional process. In addition, silicon carbon alloy blocks can improve the quality of molten steel, improve product quality, reduce the amount of alloy added, reduce steelmaking costs, and increase economic benefits.

Silicon carbon alloy balls are an additive used in the steelmaking process. In the process of metal refining, if an appropriate amount of silicon carbon alloy balls are added, the properties of the metal can be changed, such as steel and iron, the elements in steel and iron are mainly iron, because of the different carbon content, it can affect the physical properties of steel to change, the hardness of steel is obviously harder than iron, and the capriciousness of steel will also decline, so in cast iron, It is necessary to add a proper amount of silicon carbon alloy balls in the process of steelmaking.

Production and manufacturing process of silicon carbon alloy

Silicon carbon alloy is an important alloy material, which is composed of silicon and carbon. The following is an introduction to the production and manufacturing process of silicon carbon alloy:

1. Raw material preparation: The main raw materials of silicon carbon alloy are silicon and carbon. Silicon is usually smelting quartz ore to obtain high purity silicon metal; Carbon is usually used in coke, graphite and other materials.
2. Mixing and ratio: the pure metal silicon and carbon materials are mixed according to a specific proportion, and the appropriate amount of flux and additives are added. The mixing process ensures that the raw materials are fully and evenly mixed to ensure the uniformity and stability of the subsequent smelting process.
3. Furnace refining: the mixture is put into a special electric furnace or furnace for high temperature smelting. In the process of smelting, the metal silicon in the mixture is carbonized to form silicon carbon alloy by heating control and the action of reducing agent. Temperature, time and other process parameters need to be precisely controlled to obtain the desired smelting results.
4. Refining and purification: The silicon carbon alloy obtained by smelting may still contain certain impurities, which need to be refined and purified. The refining process includes slag removal, deoxidation and sulfur removal to improve the purity and properties of the alloy.
5. Forming and processing: The refined and purified silicon carbon alloy can be formed and processed. Depending on the specific needs, silicon-carbon alloys can be prepared into products of different shapes and sizes by pressing, sintering, casting and processing.
6. Quality control: In the production process of silicon carbon alloy, quality control is very important. Through chemical analysis, physical property testing and metallographic microscopy and other inspection methods, to ensure that the composition and performance of the product meet the specified standards.

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