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Classification and application of ferro silicon
Classification and application of ferro silicon
Ferro silicon is divided into four categories according to the smelting method: high silicon ferrosilicon (GG), ordinary ferrosilicon (PG), low aluminum ferrosilicon (DL) and high purity ferrosilicon (GC). High purity ferro silicon refers to the ferro silicon with low content of impurity elements produced by outside furnace refining.High silicon iron silicon can be used to prepare semiconductor pure silicon in the electrical industry, and can be used to manufacture silicone in the chemical industry.The production of low aluminum ferro silicon is made by using natural silica as raw material, metallurgical coke as reducing agent and adding a certain amount of iron-bearing material in ore-heat electric furnaceHigh purity ferro silicon can be used as deoxidizer and alloy additive, mainly used in the production of steel cord, clean steel, non-oriented silicon steel, oriented silicon steel, high density plate, alloy steel and other high-end steel. Its deep processing materials are widely used in many fields such as electrical engineering and automobile manufacturing. Use of ferro siliconUsed as deoxidizer and alloying agent in steelmaking 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, the chemical affinity between silicon and oxygen is very large, so ferro silicon is a strong deoxidizer for precipitation and diffusion in steelmaking.Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel, so when smelting structural steel (containing silicon 0.40-1.75%), tool steel (including SiO.30-1.8%), spring steel (including SiO.40-2.8%) and transformer silicon steel (containing silicon 2.81-4.8%), Ferro silicon is also used as an alloying agent. At the same time, improving the shape of inclusions and reducing the content of gas elements in molten steel is an effective new technology to improve steel quality, reduce cost and save iron. It is especially suitable for continuous casting steel deoxidation requirements. Practice has proved that ferro silicon not only meets the deoxidation requirements of steelmaking, but also has desulfurization performance and has the advantages of heavy ratio and strong penetration The production method of high quality ferro silicon products:(1) Screening raw materials silica, reducing agent, steel or/silicon steel chips, silica for quartz stone or white silica, black silica, reducing agent for metallurgical coke and gas coke, or charcoal and gas coke, charcoal and petroleum coke and wood blocks, according to the exact composition content of various raw materials and the variety to be produced for all elements of the requirements, According to the known technology, the amount of each raw material is calculated, mixed and filled into the ore furnace according to the usual smelting conditions and operations of ferro silicon alloy smelting.(2) Before oxygen blowing at the bottom of the furnace for refining and ferro silicon ore drawing, add the calculated amount of pre-fused slag or/and silica fume, quartz powder, CaF2 or CaO to the refined hot metal ladle to adjust the composition of the slag to the weight content of SiO2 > 60%, CaO < 30%, and other < 10%. After baking the pre-fused slag of the hot metal ladle to > 200℃, The hot metal is loaded into the ore furnace, and oxygen or air is blown into the bottom of the bag, oxygen and helium, air and helium, air and oxygen are refined outside the furnace. The gas pressure is > 0.5MPa, the gas flow rate is > 6Nm3/h, and the refining time is 30-40 minutes.(3) The ferro silicon containing C < 0.03% is required to remove the silicon carbide (SiC) precipitated on the surface and the slag adhering to the surface of the ingot after cooling, so as to obtain high-quality ferro silicon products.
 2023-11-06   189
Composition and application of ferro silicon slag
Composition and application of ferro silicon slag
Composition of ferro silicon slagFerro silicon slag is a kind of slag produced in the process of iron making and casting, its main components include SiO2, FeO, Al2O3, CaO, MgO, etc., of which SiO2 content occupies a higher proportion, generally more than 45%, FeO content is also relatively high, generally about 20%. In addition, the ferro silicon slag also contains a small amount of other elements and oxides, such as TiO2, MnO and so on. The role of ferro silicon slagIron and steel manufacturing: ferro silicon slag can be used in the process of iron and steel smelting desulfurization, deoxidation and other reactions. Ferro silicon slag can reduce iron oxide to FeO at high temperature, thus reducing the oxidizing substances in steel and improving the quality of steel. The application of ferro silicon slag in high-carbon ferro chrome smelting (ferro alloy plant) in the smelting of high-carbon ferro chrome with a small amount of 75% ferro silicon slag, can play a role in improving the furnace temperature, promoting the smelting reaction, reducing the sulfur content of products, and has a good production effect. Ferro silicon slag contains valence elements silicon, silicon carbide and manganese, is the main elements of smelting silicon manganese alloy, can be used as smelting silicon manganese alloy charge. Smelting silicon manganese alloy with ferro silicon slag not only reduces the production of raw materials, silica, coke, but also saves power.
 2023-11-03   187
Application of silicon carbide in casting
Application of silicon carbide in casting
Overview of the application of silicon carbide in the field of castingSilicon carbide is made of carbon and silicon raw materials heat treatment, with high hardness, high strength, high temperature resistance, corrosion resistance and other characteristics, so it is widely used in the field of casting. Silicon carbide products mainly include containers, stoves, pipes, ceramic accessories, kiln utensils and so on. In addition, silicon carbide can also be used as a coating additive to improve the surface quality of castings. The advantages of silicon carbide in the field of casting1. Good high temperature resistanceIn the field of casting, it is often necessary to deal with high-temperature materials, such as molten aluminum. Silicon carbide has high temperature resistance and can withstand wear and corrosion at high temperatures. For traditional ceramic products, cracking and deformation are easy to occur at high temperatures, and silicon carbide can avoid these problems.2. Strong corrosion resistanceCorrosive materials are often encountered in the casting field, such as acidic and alkaline materials. Silicon carbide has corrosion resistance and can be used for the treatment of most corrosive materials.3. Long lifeCompared with traditional ceramic materials, silicon carbide has a longer service life. This is because of the hardness of silicon carbide, good wear resistance, not easy to damage.4. Cost effectiveAlthough the price of silicon carbide is higher, it still has a cost-effective advantage compared with traditional ceramic materials. This is because silicon carbide has better performance in terms of service life and performance.Silicon carbide ConclusionIn short, silicon carbide is a widely used material in the field of casting. Because of its unique performance, it can effectively improve the casting quality, improve production efficiency, and has a long service life, so it is widely welcomed by foundry manufacturers.
 2023-10-31   148
What is the effect of silicon carbide temperature lifting agent?
What is the effect of silicon carbide temperature lifting agent?
There are many types of steelmaking temperature lifting agent, mainly coke, anthracite, silicon manganese powder, iron silicon silicon and silicon carbide, the first four kinds, silicon carbide temperature lifting agent before the application of many manufacturers, with the development and application of silicon carbide, silicon carbide ball has become a new type of steelmaking temperature lifting agent. The Actual Production Processsilicon carbide can be used as a good temperature lifting agent in converter steelmaking, and the chemical composition and physical properties of silicon carbide temperature lifting agent are as follows: Silicon carbide can react with various oxygen in the converter to release heat, and its heat is absorbed by the molten steel to raise the temperature of the molten steel, in addition, the silicon carbide temperature lifting agent is simple to operate, the composition of the small fluctuation, can ensure that the temperature is relatively stable, in addition, the application of silicon carbide temperature lifting agent is also conducive to slag production in the converter. This can better ensure that the temperature of molten steel meets the requirements of the temperature of molten steel for continuous casting Silicon carbide temperature lifting agent can realize the role of temperature increase, deoxidation and carburization, and the production cost is low. It can replace part of ferrosilicon and carburizing agent, so that the temperature, deoxidation and carburizing are completed at one time, after adding molten steel, it is not blown, no open flame, high utilization rate, improving the burning loss and environmental pollution caused by adding various powder deoxidation and carburizing agent in the use of the original process, and at the same time, due to the gravity of the pellet sinking into the molten steel, gradually floating from the bottom of the furnace to produce carbon monoxide.It plays the role of mixing molten steel, which can effectively improve the quality of steel, and turn a large amount of industrial waste into treasure, greatly reducing the production cost of steel.
 2023-10-30   156
High silicon silicon manganese alloy
High silicon silicon manganese alloy
High silicon silicon manganese alloy is a kind of semi-finished product, which is the raw material for the production of metallic manganese by electrosilicothermal method. High silicon manganese silicon alloy smelting is carried out in the ore furnace, and compared with commercial manganese silicon alloy, it contains high silicon, impurities iron, carbon, phosphorus and other low content. In terms of raw material requirements for temperature control, it is higher than that of ordinary manganese silicon alloys. The smelting principle of high silicon manganese silicon alloy is the same as that of manganese silicon alloy. It can be seen from the thermodynamic conditions of the formation of manganese silicon alloy that the higher the silicon content, the higher the required reduction reaction temperature, so the production of high silicon manganese silicon alloy should maintain a higher furnace temperature than the production of ordinary manganese silicon alloy. Under the conditions of the required temperature, in order to promote the reduction of silicon and manganese, there should be a larger reaction area and slag with good chemical and physical properties, which can be regarded as the kinetic conditions required for the smelting of high-silicon manganese-silicon alloy. It can be seen that the standard raw materials, higher furnace temperature, good chemical and physical properties of the slag, a large reaction area, are the necessary conditions to ensure that the high silicon manganese silicon alloy smelting furnace condition.
 2023-10-27   157
Application of spheroidizing agent
Application of spheroidizing agent
Affinity of spheroidized elements with sulfur, oxygen and other elements in hot metal. Strong affinity, silica carbide action, and form compounds with it, as foreign in the solidification process of liquid iron, such as rare earth, magnesium, calcium and other spheroidizing elements. The ability of spheroidizing elements to change the shape of graphite from sheet to spherical. The specific range of standards should be tailored to their own products. Too low to meet the requirements of the spheroidization process, resulting in spheroidization. Too high is easy to backfire, resulting in poor spheroidization, iron night supercooling degree, white mouth and shrinkage tendency to increase. Spheroidizing agents are certain metals or alloys added to liquid iron in order to obtain spheroidal graphite cast iron. An additive that crystallizes graphite in cast iron into pellets is called spheroidizing agent. The main component of nodulating agent is nodulating element, silicon carbon powder, such as Mg, Ce, Ca and so on. Spherical graphite in nodular cast iron is cast iron liquid after spheroidization treatment, so that its strength is much higher than gray cast iron, toughness is better than malleable cast iron, but also to maintain a series of advantages of gray cast iron. Strong spheroidizing ability, reduce the amount of residual magnesium required to ensure the spheroidization of graphite, can deal with subcrystalline products and over-eutectic components, silicon carbon powder price, high sulfur content and slightly lower temperature of hot metal, eliminate the harmful effect of interfering with rare earth magnesium spheroidizing agent spheroidizing elements, for the production of ductile iron pipe is a widely used spheroidizing agent, to adapt to the current domestic melting conditions.
 2023-10-25   151
Production and manufacturing process of silicon carbon alloy
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.Through the above production and manufacturing process, silicon carbon alloy can obtain high purity and excellent performance to meet the needs of different fields.The continuous improvement and innovation of these processes and technologies will drive the application and development of silicon carbon alloys in various industries.
 2023-10-23   159
What is ferro vanadium nitride
What is ferro vanadium nitride
1, the basic characteristics of ferro vanadium nitride: ferro vanadium nitride is mainly composed of vanadium, nitrogen, iron, containing two metals, is a true sense of vanadium nitrogen alloy. The product density can reach more than 5.2G/CM3, and the ratio of vanadium and nitrogen can reach 4.13, which is closer to the ideal ratio of vanadium and nitrogen 3.64 compared with vanadium nitride 5.5, after the application of many large iron and steel enterprises in China, the addition of tons of steel is 0.5-0.7KG, which can save 12.5% of vanadium resources, compared with the addition of iron vanadium, the amount of vanadium can be reduced by 50%. 2, the main use of ferro vanadium nitride: ferro vanadium nitride through refining grain and precipitation strengthening, greatly improve the strength of steel and improve the toughness of steel and other comprehensive characteristics; The steel bar added with vanadium ferro nitride has the characteristics of low cost, stable performance, small strength fluctuation, cold bending, excellent welding performance and basically no aging. The addition of vanadium ferro nitride does not need to change the current production process of second-grade rebar in domestic iron and steel enterprises, and has no special requirements for temperature control and rolling control. It is especially suitable for Chinese iron and steel enterprises to rapidly realize the upgrading of rebar products from grade II to grade III, grade IV and even grade V rebar under the existing production equipment and process conditions. Fe-vanadium nitride is also widely used in thin slab continuous casting and rolling high-strength strip steel, non-tempered steel, high-strength H-shaped steel, high-speed tool steel, high-strength pipeline steel and other products, which is an economic and effective way to improve the strength of steel and improve the toughness and other comprehensive properties of steel through micro-alloying.
 2023-10-20   297
Silicon-calcium-manganese deoxidizer
Silicon-calcium-manganese deoxidizer
The main component of silicon-calcium-manganese deoxidizer is an alloy composed of silicon, calcium, manganese and other elements. Among them, silicon and calcium can effectively reduce the melting point of the alloy and improve its wettability, which is conducive to the deoxidation reaction. Manganese can increase the strength and stability of the alloy and reduce the sintering and caking phenomenon of the alloy. When choosing silicon calcium manganese deoxidizer, the specific product model and dosage should be determined according to the specific production process and raw material situation. In general, the composition and dosage of deoxidizer should be determined according to the composition, melting point, wettability and other factors of the metal base material. In addition, it is also necessary to consider the size of the deoxidizer, hardness, ease of use and other factors. Product advantageSilica-calcium-manganese deoxidizer has the following advantages:1. Efficient deoxidation: silicon calcium manganese deoxidizer can effectively remove oxygen in metal matrix materials, improve its purity and quality.2. Strong adaptability: silicon calcium manganese deoxidizer can be applied to a variety of metal matrix materials, such as steel, iron, aluminum alloy and so on.3. Improve production efficiency: The use of silica-calcium-manganese deoxidizer can reduce energy consumption and material consumption in the production process and improve production efficiency.4. Environmental safety: silicon calcium manganese deoxidizer will not produce toxic and harmful substances in the process of use, harmless to the environment and human health. Silica-calcium-manganese deoxidizer is mainly used in the following scenarios:1. Steel industry: In steel production, the use of silicon calcium manganese deoxidizer can reduce the oxygen content in steel and improve the quality and purity of steel.2. Casting industry: In the casting process, the use of silica-calcium-manganese deoxidizer can remove oxides and other impurities in liquid metal and improve the quality and stability of castings.
 2023-10-19   206
ferro silicon grains
ferro silicon grains
Ferrosilicon particles referred to as silicon particles, that is, ferrosilicon inoculant, used in steelmaking, ironmaking, casting a inoculant. Silicon grain characteristics:(1) The composition of ferrosilicon particles is uniform and the segregation is small;(2) Iron silicon particle size is uniform, no fine powder, stable inoculation effect;(3) The inoculation effect of ferrosilicon particles is stronger than that of ordinary ferrosilicon, and the tendency to produce slag is also small;(4) Extend die life and reduce surface defects;(5) Reduce pinholes, improve the surface quality of the cast pipe, and improve the pass rate of the first inspection;(6) Eliminate microporosity and improve the machining performance of castings. The use of ferro silicon grains:(1) Used as deoxidizer and alloying agent in steelmaking industry.(2) Used as inoculant and nodulator in the cast iron industry. Cast iron is an important metal material in modern industry, it is cheaper than steel, easy to melt and smelt, has excellent casting performance and much better earthquake resistance than steel. In particular, ductile iron, its mechanical properties reach or approach the mechanical properties of 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, so in the production of ductile iron, ferrosilicon is an important inoculant (to help precipitate graphite) and spheroidizing agent.
 2023-10-18   209
Alloy seamless calcium wire features
Alloy seamless calcium wire features
Seamless calcium wire has the following characteristics: First, it has good high temperature stability, can maintain good mechanical properties at high temperatures. Secondly, the seamless calcium wire has strong corrosion resistance and can effectively resist the corrosion of various corrosive media. In addition, the seamless calcium wire is also easy to process and can be made into various shapes by stretching, bending, crimping and other processes to meet different application needs. Seamless calcium wire is widely used in petrochemical field. Because of its corrosion resistance and high temperature stability, seamless calcium wire is widely used in the manufacture of various pipes, reactors, storage tanks and other equipment. In the aerospace field, seamless calcium wire is used to manufacture various aircraft and spacecraft parts because of its light weight and high strength. In addition, the application of seamless calcium wire in automotive manufacturing, Marine technology and other fields is also gradually increasing. In many cases, the performance of seamless calcium wires is obvious. For example, after the use of seamless calcium lines, the oil pipelines of oil companies not only significantly improve the corrosion resistance of the pipelines, but also maintain a stable high temperature performance during use, which brings a stable guarantee for oil transportation. In the aviation sector, a major aircraft manufacturer has begun to choose seamless calcium wire to manufacture key components to reduce the weight of the aircraft and improve the efficiency of navigation. In general, seamless calcium wire as a unique and strong material, its high temperature stability, corrosion resistance and easy processing make it have great potential in many applications. The application of seamless calcium wire in chemical industry, aerospace engineering and automobile manufacturing is gradually increasing. With the development and application of science and technology, seamless calcium wire will undoubtedly become an important direction in the field of metal products in the future.
 2023-10-17   166
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