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The Application of Low Carbon Ferrochrome in Steelmaking

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The Application of Low Carbon Ferrochrome in Steelmaking Industry

Low carbon ferrochrome is an iron alloy composed of iron and silicon. Low-carbon ferrochromium is an iron-silicon alloy made of coke, steel shavings and quartz as raw materials and smelted in an electric furnace. Because silicon and oxygen are easily combined into silicon dioxide, low-carbon ferrochromium is often used as a deoxidizer in steelmaking. At the same time, because SiO2 generates a lot of heat, it is also beneficial to increase the temperature of molten steel during deoxidation. At the same time, low-carbon ferrochromium can also be used as an alloying element additive, and is widely used in low-alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. Low-carbon ferrochromium is commonly used  as a reducing agent in ferroalloy production and chemical industry.

Low carnon ferro chrome is also used as deoxidizer and alloying agent in steelmaking industry. In order to obtain steel with qualified chemical composition and ensure the quality of steel, adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel. Steel (containing SiO.30-1.8%), spring steel (containing SiO.40-2.8%) and silicon steel for transformers (containing silicon 2.81-4.8%) also use low-carbon ferrochrome as an alloying agent. Practice has proved that low-carbon ferrochromium not only meets the deoxidation requirements of steelmaking, but also has desulfurization performance and has the advantages of large specific weight and strong penetrating power.
In addition, in the steelmaking industry, low-carbon ferrochromium powder is often used as a heating agent for steel ingot caps to improve the quality and recovery rate of steel ingots by utilizing the characteristic that low-carbon ferrochromium powder can release a large amount of heat when it is burned at high temperature.

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    Carbon Content in Different Types of Ferro Chrome

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    Carbon Content in Different Types of Ferro Chrome

    Ferrochrome is an iron alloy composed of chrome and iron, and is an important alloying additive for steelmaking. According to different carbon content, ferro chrome can be divided into high carbon ferrochrome (4~8% carbon), medium carbon ferrochrome (0.5~4% carbon), low carbon ferrochrome (0.15~0.50% carbon) , micro-carbon ferrochrome (carbon content is 0.06%), ultra-micro-carbon ferrochrome (carbon content is less than 0.03%), metal chromium, silicon-chromium alloy, ferrochromium nitride, etc.

    ferro chrome alloy

    Ferrochrome is mainly used as an alloy additive for steelmaking, and low-carbon and micro-carbon ferrochrome must be used to smelt stainless steel and other low-carbon steels, so the production of refined ferrochrome was once developed on a large scale.

    Medium, low, and micro-carbon ferrochrome generally use silicon-chromium alloy, chromite and lime as raw materials. They are refined and desiliconized in a 1500-6000 kVA electric furnace, and are operated with high-basic slag (CaO/SiO2 is 1.6-1.8). Low-carbon and micro-carbon ferrochromium is also produced on a large scale by the heat transfer method. During production, two electric furnaces are used, one for smelting silicon-chromium alloy and the other for melting slag composed of chromium ore and lime.

    Oxygen blowing method is used to refine medium and low carbon ferrochrome, using liquid carbon ferrochrome as raw material, adding a small amount of lime and fluorite to the molten pool during blowing to form slag, and adding silicon chromium alloy or ferrosilicon to recover the slag before iron tapping chromium. The blowing of micro-carbon ferrochrome is only possible under a certain degree of vacuum.

    Vacuum solid-state decarburization refining, using finely ground high-carbon ferrochrome as raw material, wherein a part of the finely ground high-carbon ferrochrome is oxidized and roasted as an oxidant, mixed with water glass or other binders, pressed into agglomerates, and subjected to low temperature After drying, heat reduction for 35 to 50 hours in a vacuum furnace with a vacuum degree of 0.5 to 10 mmHg and a temperature of 1300 to 1400 ° C to obtain micro carbon with a carbon content of less than 0.03% or even less than 0.01%. ferrochrome.

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      Welcome Visit Our Booth at GIFA 2023 Trade Fair!

      Welcome Visit Our Booth at GIFA 2023 Trade Fair!

      We JBT Metallurgical Refractory Co., Ltd are excited to announce that our company will be attending the 2023 GIFA Trade Fair. This event will take place from June 12th to June 16th at the Messe Düsseldorf in Germany.

      We are proud to showcase our main products which include ferro silicon, silicon metal, carbon raiser, silicon carbide and many more. We believe that this event will provide us with an excellent opportunity to present our products to a global audience and meet with potential partners and customers.

      We look forward to seeing you at our booth and discussing how we can help meet your needs with our high-quality products.

      Thank you for your continued support.

      BOOTH NO. D01-3 Hall 5

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        What is the Difference between Black Silicon Carbide and Green SiC

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        What is the Difference between Black Silicon Carbide and Green SiC

        Both black silicon carbide and green silicon carbide are smelted from quartz sand, petroleum coke and sawdust through resistance furnace at high temperature. But their physical properties and uses are very different.

        Black silicon carbide contains about 98.5% SiC, and its toughness is higher than that of green silicon carbide. Black silicon carbide does not require additives, and the smelting time is lower than that of green silicon carbide. Black silicon carbide is mainly used to process materials that resist tensile strength, such as glass, ceramics, stone, refractory materials, cast iron, non-ferrous metals, etc. such as glass, ceramics, stone, refractory materials, cast iron and non-ferrous metals. Black silicon carbide has high purity and is also widely used in the manufacture of refractory materials and various abrasive tools.

        green silicon carbide

        Green silicon carbide is smelted with salt as an additive. The smelted crystal has high purity and high hardness, and its hardness is between diamond and corundum. Green silicon carbide contains more than 99% SiC and has good self-sharpening properties. It is mostly used for processing hard alloys, titanium alloys and optical glass, and is also used for honing cylinder liners and fine grinding high-speed steel tools. In addition, there is cubic silicon carbide, which is a yellow-green crystal produced by a special process, and the abrasive tools used to manufacture are suitable for superfinishing of bearings.
        Green silicon carbide is suitable for grinding copper, brass, aluminum, precious stones, optical glass, ceramics and other hard alloys, metals and hard and brittle non-metallic materials. Green silicon carbide can also be used in ceramic materials.

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          Silicon Metal 511

          Silicon Metal 511

          Silicon Metal 511

          Silicon Metal 511

          Silicon Metal 511

          Silicon Content
          96 %
          • Fe<0.8%
          • Al < 0.1%
          • Ca < 0.1%

          Silicon Metal 511

          • Brand: JBT Jinbeite
          • Types: Lumps, Grains and Powder
          • Size: 0~10mm, 10~100mm
          • With or Without Oxygen
          • Package: 1MT Jumbo Bag
          • MOQ: 20 Tons
          • Delivery Time: 7 Days
          • Payment Terms: T/T, LC
          • Certificate: SGS, BV, CCIC
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          Online Chat
          sic briquette SGS
          CTC_01
          silicon metal certificate
          ccic

          Silicon Metal Product

          silicon metal 553

          Silicon Metal 553

          Silicon Content
          98.7 %
          • Fe<0.5%
          • Al < 0.5%
          • Ca < 0.3%

          Silicon Metal 441

          Silicon Content
          99.1 %
          • Fe<0.4%
          • Al < 0.4%
          • Ca < 0.1%
          silicon metal 3303

          Silicon Metal 3303

          Silicon Content
          99.37 %
          • Fe<0.3%
          • Al < 0.3%
          • Ca < 0.03%
          silicon metal 2202

          Silicon Metal 2202

          Silicon Content
          99.58 %
          • Fe<0.2%
          • Al < 0.2%
          • Ca < 0.02%

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          Silicon Metal Technical Specification

          NO.CHEMICAL CONTENT %
          SiFeAlCa
          55398.7%0.5%0.5%0.3%
          55198.6%0.8%0.5%0.1%
          51199%0.8%0.1%0.1%
          44199.1%0.4%0.4%0.1%
          41199.4%0.4%0.1%0.1%
          330399.37%0.3%0.3%0.03%
          220299.58%0.2%0.2%0.02%
          110199.79%0.1%0.1%0.01%
          9797%1.5%0.5%0.3%

          Application and Advantages of Silicon Metal 97

          • Silicon metal 97 is also known as off grade silicon, emerged as market requirements for metal silicon grades gradually declined.
          • 97 silicon metal mainly be use to the industry of organosilicon, polysilicon and cast aluminum alloy.
          • 97 Silicon metal as byproduct of the metal silicon production process, the silicon content is less than that of standard silicon metal 553/441/3303/2202, and the general silicon content is about 97%. Its use is also used as an oxygen scavenger, and it can be used for other purposes instead of metal silicon.

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          Qugou Industrial Zone

          Anyang City, Henan Province of China

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          Phone : + 86 159 37282819

          Email : info@jbtmetals.com

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          MON-FRI 09:00 – 19:00

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          JBT produces and supplies silicon metal and ferrosilicon products, mainly products are silicon metal 553, 441, 421, 411 3303,2202, 97, silicon carbide, carbon raiser for steelmaking and casting industries. We also make electrolytic manganese metal, inoculants and nodulizers. 

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          Silicon Metal 551

          silicon metal 551

          Silicon Metal

          silicon metal 551

          Silicon Metal 551

          Silicon Content
          98.6 %
          • Fe<0.8%
          • Al < 0.5%
          • Ca < 0.1%

          Silicon Metal 551

          • Brand: JBT Jinbeite
          • Types: Lumps, Grains and Powder
          • Size: 0~10mm, 10~100mm
          • With or Without Oxygen
          • Package: 1MT Jumbo Bag
          • MOQ: 20 Tons
          • Delivery Time: 7 Days
          • Payment Terms: T/T, LC
          • Certificate: SGS, BV, CCIC
          Inquiry
          Online Chat
          sic briquette SGS
          CTC_01
          silicon metal certificate
          ccic

          Silicon Metal Product

          silicon metal 553

          Silicon Metal 553

          Silicon Content
          98.7 %
          • Fe<0.5%
          • Al < 0.5%
          • Ca < 0.3%

          Silicon Metal 441

          Silicon Content
          99.1 %
          • Fe<0.4%
          • Al < 0.4%
          • Ca < 0.1%
          silicon metal 3303

          Silicon Metal 3303

          Silicon Content
          99.37 %
          • Fe<0.3%
          • Al < 0.3%
          • Ca < 0.03%
          silicon metal 2202

          Silicon Metal 2202

          Silicon Content
          99.58 %
          • Fe<0.2%
          • Al < 0.2%
          • Ca < 0.02%

          Contact Us to Get Your Best Price !

          Inquiry Now

          Silicon Metal Technical Specification

          NO.CHEMICAL CONTENT %
          SiFeAlCa
          55398.7%0.5%0.5%0.3%
          55198.6%0.8%0.5%0.1%
          51199%0.8%0.1%0.1%
          44199.1%0.4%0.4%0.1%
          41199.4%0.4%0.1%0.1%
          330399.37%0.3%0.3%0.03%
          220299.58%0.2%0.2%0.02%
          110199.79%0.1%0.1%0.01%
          9797%1.5%0.5%0.3%

          Get in Touch

          Location

          Qugou Industrial Zone

          Anyang City, Henan Province of China

          Contact Us

          Phone : + 86 159 37282819

          Email : info@jbtmetals.com

          Our Hours

          MON-FRI 09:00 – 19:00

          SAT-SUN 10:00 – 14:00

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          JBT produces and supplies silicon metal and ferrosilicon products, mainly products are silicon metal 553, 441, 421, 411 3303,2202, 97, silicon carbide, carbon raiser for steelmaking and casting industries. We also make electrolytic manganese metal, inoculants and nodulizers. 

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          Carburizer Types and Introduction

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          Carburizer Types and Introduction

          According to different raw materials, the most widely used carbon raiser include woody carbon, coal carbon, coke carbon and graphite carbon.

          carbon raiser types

          Coal Carbon Raiser

          Calcined Coal Carburizer is a product obtained by calcination of low-ash, low-sulfur refined anthracite in a calciner at a high temperature of about 1250 ° C. The main production sites are in Ningxia and Inner Mongolia. Generally, the carbon content is 90-93%, and it is mainly used in steelmaking enterprises, and some foundries use it in gray cast iron. Due to its compact carbon molecular structure, it absorbs heat slowly and takes a long time during application.

          Pitch coke recarburizer is a by-product of coal tar hydrogenation to produce oil, is a high-carbon, low-sulfur, low-nitrogen recarburizer extracted from tar. The carbon content is between 96-99.5%, its volatile matter is low, the structure is dense, the mechanical strength and wear resistance of the particles are relatively high, and it is easy to graphitize.

          Metallurgical coke recarburizer is coking coal firing is the large coke usually used in cupolas. In addition to smelting, it is also used for recarburization of metal charge.

          Petroleum Coke Carnon Raiser

          Calcined coke recarburizer is a product that uses low-sulfur petroleum coke as a raw material and undergoes high-temperature treatment at 1300-1500 degrees in a calciner to remove moisture, volatile matter and impurities. Its fixed carbon content is generally stable at about 98.5%, and its sulfur content is mostly less than 0.5% or 1%. Its density is compact, it is not easy to decompose, and it takes a medium time to use.

          Petroleum coke is a graphitized product produced in a graphitized smelting furnace at a high temperature of 3000 degrees, which has the advantages of fast absorption, high carbon content and low sulfur content. Its carbon content is 98-99%, and the sulfur content index is less than 0.05% or 0.03%. The production areas are concentrated in Inner Mongolia, Jiangsu, and Sichuan. Another way comes from the cutting waste of graphite electrodes. Since the graphite electrode itself has been graphitized, its waste can also be used as a recarburizer for steel mills.

          Semi-graphitized petroleum coke recarburizer: the graphitization temperature is not as high as that of graphitized recarburizers, the carbon content is generally greater than 99.5, and the sulfur content is higher than that of graphitized recarburizers, below 0.3%.

          Graphite Carnon Raiser

          Amorphous graphite recarburizer: It is the application of amorphous graphite in steel smelting or casting carburization. Usually, the carbon content is 75-80%. It can be purified to increase the carbon content of the product.

          Natural graphite recarburizer: mainly flake graphite, carbon content ranging from 65-99%, low stability, generally used in steelmaking plants.

          Synthetic recarburizer use leftover materials such as graphite powder, coke powder, petroleum coke, etc., add different binders and use machines to press and shape, and it is in the form of stick particles. The carbon content is generally between 93-97%, and the sulfur content is extremely unstable, generally between 0.09-0.7.

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            Advantages of Graphite Recarburizer

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            Advantages of Graphite Recarburizer

            Graphite recarburizer has high fixed carbon content, good absorption rate, low sulfur and low nitrogen, and faster absorption speed than similar graphitized recarburizers, and does not adsorb to the furnace wall, completely absorbs without residue, and the price is lower than similar sulfur. The graphitized recarburizer below 0.05 is the most cost-effective.

            carbon raiser
            • The absorption rate is good, and the absorption rate can reach more than 90%.
            • he absorption speed is fast, which is faster than that of similar graphitized recarburizers. It does not adsorb to the furnace wall and has no residue. The advantage of carbon increase and absorption speed in the furnace is more obvious.
            • Low sulfur content, less than 0.05%, minimum 0.02%. Low nitrogen content, below 100ppm
            • Graphite recarburizer can reduce costs and improve product quality for you.
            • Reduce the amount of pig iron or use no pig iron to effectively avoid the influence of pig iron heredity on castings.
            • Without the use of pearlite stabilizers, the ferrite percentage of ductile cast iron can be greatly increased, which is 10%-15% higher than that of ordinary petroleum coke

            Compared with the improvement of the shape of ink balls, the number of ink balls has increased by up to 400%, which can greatly reduce the amount of expensive inoculants used for fine-tuning in the later stage, and significantly reduce costs. In addition, due to the high carbon and low sulfur content of this carburant, it can fully absorb, does not reverse slag, reduces the cost of spheroidization and slag removal, shortens the smelting cycle, and saves energy consumption.

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              JBT produces and supplies silicon metal and ferrosilicon products, mainly products are silicon metal 553, 441, 421, 411 3303,2202, 97, silicon carbide, carbon raiser for steelmaking and casting industries. We also make electrolytic manganese metal, inoculants and nodulizers. 

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              The Usage of Graphitized Recarburizer in Steelmaking Industry

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              The Usage of Graphitized Recarburizer in Steelmaking Industry

              JBT graphite carbon additives has the following advantages:

              • high fixed carbon, low sulfur and low nitrogen, less harmful impurities, high absorption rate,
              • Excellent crystallinity quality, effectively improving the grade and performance of cast iron castings
              • stable carburizing effect, good absorption effect, obvious temperature raising effect, no slag return

              And the absorption speed is faster than similar graphitized recarburizers, and it does not adsorb to the furnace wall, completely absorbs without residue, and the price is lower than similar graphitized recarburizers with sulfur less than 0.05, which is cost-effective.
              High absorption rate, according to the method of use, the highest absorption rate can reach more than 90%.
              The absorption speed is fast, which is faster than that of similar graphitized recarburizers. It does not adsorb to the furnace wall and has no residue. The advantage of carburization and absorption speed in the furnace is more obvious.
              Low sulfur content, less than 0.05%
              Ultra-high cost performance, summarizing the above-mentioned advantages of the best price among similar graphitized recarburizers (sulfur ≤ 0.05).
              The use of recarburizers can increase the amount of scrap steel, reduce the amount of pig iron or eliminate the use of pig iron, and effectively avoid the influence of pig iron genetics on castings.
              Low sulfur content, stable and reliable, effectively saves the adverse effect of sulfur on the alloy during the spheroidization and inoculation process, and saves the cost of the alloy.
              Due to the low melting point, fast absorption and no slag inversion, it can effectively protect and prolong the service life of the furnace and reduce the consumption of the furnace lining

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                JBT produces and supplies silicon metal and ferrosilicon products, mainly products are silicon metal 553, 441, 421, 411 3303,2202, 97, silicon carbide, carbon raiser for steelmaking and casting industries. We also make electrolytic manganese metal, inoculants and nodulizers. 

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                Applications of Silicon Carbide

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                Applications of Silicon Carbide

                Abrasives Industry
                Silicon carbide mainly used for the grinding and polishing of grinding wheels, sandpaper, abrasive belts, oil stones, grinding blocks, grinding heads, grinding pastes, etc.

                Steelmaking Industry
                Silicon carbide can be used as a deoxidizer for steelmaking and a modifier for cast iron structure, and can be used as a raw material for making silicon tetrachloride. It is the main raw material for the silicone resin industry. Silicon carbide deoxidizer is a new type of strong composite deoxidizer, which replaces the traditional silicon powder and carbon powder for deoxidation. Steelmaking efficiency, improving the quality of steel, reducing the consumption of raw and auxiliary materials, reducing environmental pollution, improving working conditions, and improving the comprehensive economic benefits of electric furnaces are all of great value.

                Wear-resistant, Refractory and Corrosion-resistant Materials Field
                Silicon carbide has the characteristics of corrosion resistance, high temperature resistance, high strength, good thermal conductivity, and impact resistance. On the one hand, silicon carbide can be used in various smelting furnace linings, high-temperature furnace components, silicon carbide plates, lining plates, supports, and saggers. , silicon carbide crucible, etc. the

                 

                Non-ferrous Metal Field
                The use of silicon carbide has high temperature resistance, high strength, good thermal conductivity, and impact resistance. It can be used as high-temperature indirect heating materials, such as hard pot distillation furnaces, rectification furnace trays, aluminum electrolytic cells, copper melting furnace linings, and arcs for zinc powder furnaces. Type plate, thermocouple protection tube, etc.

                Metallurgical Industry
                The hardness of silicon carbide is second only to diamond, and it has strong wear resistance. It is an ideal material for wear-resistant pipes, impellers, pump chambers, cyclones, and mine bucket linings. Its wear resistance is 5 times that of cast iron and rubber. –20 times&def is also one of the ideal materials for aviation runways.

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                  JBT produces and supplies silicon metal and ferrosilicon products, mainly products are silicon metal 553, 441, 421, 411 3303,2202, 97, silicon carbide, carbon raiser for steelmaking and casting industries. We also make electrolytic manganese metal, inoculants and nodulizers. 

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