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Deoxidizer silicon carbide can be classified into primary silicon carbide and secondary silicon carbide based on its content. Secondary silicon carbide, also known as metallurgical grade silicon carbide, differs from common alloy materials. It is a compound formed primarily from quartz sand and coke at high temperatures, containing approximately 70% silicon, 30% carbon, and about 4% free carbon. Metallurgical silicon carbide appears as black crystals under sunlight. Therefore, it plays a role in increasing carbon and silicon content during steelmaking and casting, making it a relatively good composite carburizing agent in the steelmaking and casting field. Due to its corrosion resistance, high temperature resistance, and high hardness, black silicon carbide also has significant advantages in refractory materials and grinding applications. Different contents and particle sizes can be customized to meet different needs. We welcome everyone to discuss and progress together.

This colorful black stone is black silicon carbide. It's a carbide that American John Atcheson accidentally discovered during his capacitive diamond experiments in 1891. You might find it unfamiliar, but you'll definitely like its other form: moissanite, which is actually relatively pure silicon carbide. Silicon carbide is rare in nature. High purity silicon carbide was first discovered in a meteorite in 1905. Despite its dark appearance, industrial silicon carbide has a very interesting property. If you wrap one half of a piece of metallurgical silicon carbide in tin foil, connect the foil to the positive terminal of a power source, and connect a pointed metal rod to the negative terminal, and then touch the surface of the abrasive grade silicon carbide with the tip of the rod, you'll see that the contact point magically emits light. This is the electroluminescence property of silicon carbide. In 1907, people used this property to create the first silicon carbide light-emitting diode (LED). LEDs using silicon carbide as a substrate have higher brightness, lower energy consumption, longer lifespan, and smaller unit chip area, giving them a significant advantage in high-power LEDs.

Low cement anhydrous taphole clay is an unshaped refractory material used to seal blast furnace tapholes. This material is forced into the taphole using a gunning machine, hence the name “gunning mix.” The raw materials used to produce high erosion resistant taphole clay include coke stone, micaceous shale, high-alumina bauxite, mullite, silicon carbide, corundum, and coke, among others.Advantages of innovative mud products Waterless cannon mud must possess excellent plasticity, adhesion, and sintering properties, and must not crack or shrink during use;Anhydrous taphole clay offers high strength at elevated temperatures, stabilizing blast furnace production conditions and providing a reliable guarantee for increasing blast furnace output and efficiency;Anhydrous gunning mix exhibits outstanding resistance to slag erosion and low material consumption, with a specific consumption rate of only one-fifth that of hydrated gunning mix;Quick sintering taphole clay possesses moderate expansion characteristics, with a reasonable balance between porosity and mechanical strength, resulting in superior overall performance;  

During converter steelmaking, a large amount of molten steel slag is generated inside the furnace. However, the chemical composition of steel slag is complex, and the sulfur and phosphorus inclusions in the slag, in particular, have a significant impact on steel quality. When tapping the molten steel after the converter process is complete, the amount of slag flowing into the ladle with the molten steel must be strictly controlled. Typically, a converter slag stopper insertion cart is used to deploy the slag stopper to block the slag. This prevents harmful sulfur and phosphorus components from re-leaching into the molten steel during subsequent steelmaking processes, thereby avoiding phenomena such as “phosphorus re-leaching”—a common issue in steelmaking—and ensuring the quality of steel billets. This approach improves the quality of steel products, enables a clean steel production process, and helps enterprises achieve their goals of reducing costs and increasing efficiency.  

Slag-blocking balls are precast components cast into spherical shapes by mixing high-quality refractory materials, additives, binders, and an appropriate amount of ballast iron with water.During steel tapping from the converter, to prevent slag from flowing into the ladle along with the molten steel, slag-blocking balls—which have a specific gravity between that of molten steel and slag and a refractoriness of 1,790 degrees Celsius or higher—are typically dropped into the converter when approximately one-third of the molten steel remains inside. The slag-blocking balls quickly reach the tapping nozzle with the flowing molten steel and float on top of it, trapping the slag inside the converter beyond the tapping nozzle. Meanwhile, the molten steel flows through grooves on the surface of the slag-blocking ball, exits the converter via the tapping nozzle, and enters the ladle. Finally, the slag and any remaining fragments of the slag-blocking ball are emptied into the slag tank, and the smelting process continues for the next batch of steel.    

On August 1, 2026, we will celebrate the 99th anniversary of the founding of the People’s Liberation Army. The peace and stability of our land stem from the soldiers who defend our vast territory with iron will; our industrial prosperity relies on metallurgists who forge high-quality alloys through relentless refinement. On this August 1st Army Day, all employees of our company extend our highest respect to all the soldiers of the people!

Metallurgical slag washing materialSlag washing flux is a synthetic slag material mainly composed of calcium aluminate. During steelmaking, Slag Washing Material is added to the ladle and melted by the steel flow to achieve deoxidation, desulfurization, and removal of inclusions as refining auxiliary materials outside the furnace.Ladle cleaning synthetic slagSlag washing material can deeply desulfurize: during steelmaking, it is washed away by the steel flow, and emulsion stirring greatly improves the reaction range. The desulfurization rate has been improved, with sulfur content ≤ 0.005%, meeting the requirements for ultra-low sulfur in pipeline steel, bearing steel, and other materials.Best Slag Washing can be deeply deoxidized: slag washing materials are rich in aluminum salts and metallic aluminum, and after melting, they reduce the oxidizing oxides in the slag, reducing the oxidation of the slag. Prevent oxidative slag from continuously transferring oxygen to the molten steel and prevent secondary oxygen absorption of the steel. Slag washing materials can also adsorb and dissolve deoxidation products, directly removing the generated oxides in steel.Slag washing material can isolate air and prevent secondary oxidation. The slag washing material is melted by the impact of high-temperature steel flow during the steelmaking process. Form a continuous liquid synthetic slag coating on the surface of the molten steel. This layer of liquid slag isolates the high-temperature molten steel from the air, blocking the contact between oxygen and nitrogen in the air and the molten steel. Preventing secondary oxidation and nitrogen absorption of molten steel.  

After iron tapping is complete, an anhydrous gunning tool must be used to inject taphole plugging clay  into the tap hole. The newly injected high performance taphole clay  will bond with the old gunning clay remaining in the tap hole. In the high-temperature environment of the blast furnace, as soon as the leading edge of the injected  high temperature taphole clay  comes into contact with the incandescent molten iron and slag inside the furnace, its surface rapidly sintered, forming a “hard shell.” As more waterless cannon mud  is injected, the subsequent layers push this “hard shell” forward and outward in all directions. Consequently, the anhydrous rammed clay takes on a “mushroom-head” shape inside the blast furnace. The gunning clay also heats up rapidly, undergoing internal changes as it sintered and hardened, thereby forming a stable clay plug to prevent iron seepage and furnace gas leakage. The inner wall of the gunning clay at the taphole is eroded by molten iron and slag. The blast furnace gunning clay is subjected to high temperatures, chemical corrosion from molten iron and slag, and erosion. The “mushroom-shaped” structure formed by the gunning clay also serves to protect the furnace wall. During tapping, a drill bit is used to break through the hard, sintered crust of the anhydrous gunning clay, and furnace pressure is then used to push aside the remaining thin layer of anhydrous gunning clay, allowing the molten iron to flow out. This ensures the safe and continuous operation of the blast furnace. Therefore, high-quality anhydrous taphole clay must possess high-temperature resistance, sinterability, corrosion resistance, erosion resistance, and drillability.  

Graphitic Columnar AdditivesLow ash column graphite carburizer is categorized as one of the High Performance Additives featuring high fixed carbon, low sulfur and low nitrogen content, with smooth cylindrical pellets. High fixed carbon graphite column carburizer compensates carbon loss during steelmaking and casting, and accelerates graphitization, enabling finished steel and castings to achieve ideal tensile strength, wear resistance and toughness.98% carbon columnar graphite pelletsFixed CarbonA higher fixed carbon value means fewer impurities and a higher carbon absorption rate in molten metal.SulfurExcessive sulfur causes hot brittleness in steel and castings, so lower sulfur content is required.NitrogenExcess nitrogen leads to gas porosity defects in finished products, hence low nitrogen is a key standard.Ash ContentHigh ash content brings extra impurities, contaminates molten iron and increases slag removal costs.Volatile MatterHigh volatile matter results from insufficient calcination and graphitization of raw materials, which will produce dense smoke and slag inclusions in smelting.Factory StrengthsOur factory is located in Anyang, the birthplace of Yin Ruins, a world cultural heritage site. Leaning against the Taihang Mountains to the north, the area is rich in mineral resources, granting us convenient access to raw materials.We implement standardized production procedures to guarantee stable product quality. As a direct source manufacturer, we offer competitive factory prices and flexible customized solutions to meet diverse customer requirements.Customers from all over the world are warmly welcome to visit our factory and place orders.  

During the steelmaking process, when molten steel flows out, vortices can easily form, causing slag to flow into the ladle along with the molten steel. This increases the amount of inclusions in the molten steel, and the slag adheres to the inside of the ladle, shortening its service life. The steel furnace slag dart addresses this issue.The slag retention dart effectively prevents slag from flowing into the ladle with the molten steel, thereby improving the purity of the molten steel. It consists of a hemispherical conical rotor and a long guide rod. The surface of the hemispherical conical rotor features three grooves; when the high temperature resistant slag dart blocks the tapping spout, the remaining small amount of molten steel can flow into the ladle along these grooves. This design—featuring the guide rod, hemispherical conical rotor, and grooves—also breaks up vortices in the molten steel, preventing slag from being swept into the ladle along with the molten steel. This improves the performance of the steel and extends the service life of the ladle. The industrial slag blocking  reduces steelmaking costs and enhances steel quality, making it an excellent product for factories seeking to cut costs and improve efficiency.Our high-quality slag products can be customized to meet customer requirements, with timely delivery and comprehensive after-sales service. We welcome you to visit our facility and place an order.  

Waterless cannon mud contains virtually no free water, and its aggregates consist of silicon carbide, corundum, silicon nitride, and other materials. Because it contains no water, Eco-friendly mud solutions does not generate water vapor, eliminating the risks of splashing and damp gunning ports. When used in the workshop, innovative mud products produces minimal dust and smoke, meets environmental protection requirements, and improves the working environment for employees. Low smoke environmental tap hole clay has a low coefficient of expansion, is resistant to erosion and impact, has a long service life, and requires less frequent replenishment. Quick sintering resin taphole clay, sealed and waterproof packaging, not easily affected by moisture and hardening, suitable for long-distance transportation and long-term storage.Compared to high strength waterless taphole clay, hydrated gunning mix contains water, and its aggregate consists of high-alumina bauxite, ordinary coke powder, and other components. Because hydrated gunning mix contains water, when it is heated in the furnace, the water instantly vaporizes and expands, which can easily cause molten iron to spurt from the iron outlet, posing a safety hazard. When used in production workshops, hydrated gunning mix generates a lot of dust and smoke, making it inconvenient for workers to handle. After the moisture in water-based gunning mix evaporates, the interior becomes porous, making it prone to localized slump and other issues. Water-based gunning mix has an average service life and requires frequent manual maintenance. It is prone to drying out and hardening, resulting in significant wastage during long-distance transportation.

During the final stage of steel tapping, the slag blocking can remain suspended at the steel-slag interface; when the molten steel has completely drained, it precisely seals the tapping nozzle, suppressing eddy currents that entrain slag, resulting in highly efficient slag containment.   Pre-tapping Preparations Equipment Inspection: Verify that the slag stopper cart (robotic arm), hydraulic/servo systems, position encoders, and grippers are in good working order. High-quality slag products Pre-installation: Select a industrial slag blocking suitable for the steel grade and ensure it is securely gripped by the robotic arm. Tapping Hole Inspection: Confirm that the tapping hole is unobstructed and free of scale buildup. Workstation Alignment: Move the slag-blocking cart to the platform behind the furnace for pre-positioning; extend the robotic arm to a standby position, ensuring its trajectory intersects with the tapping hole. Ladle Positioning: Check that the ladle, alloy charges, and deoxidizers are in place; preheat the ladle to ≥800°C.   Tapping Phase When the converter has tapped 3/5 to 4/5 of the molten steel, lower the slag-blocking hammer above the molten steel. Due to its counterweight structure featuring a gyroscope-shaped extension rod, the guide rod will naturally point vertically downward. The flowing molten steel pushes the guide rod toward the tapping nozzle; as the guide rod enters the nozzle, the hammer head is naturally and precisely pulled into position directly above it. Due to the slag-blocking hammer’s density, the hammer head floats above the molten steel and below the slag to block slag flow. Furthermore, the grooved edges on the hammer head’s surface break up vortices, preventing them from drawing slag into the ladle.   Final Blocking and Slag Retention As the molten steel flows out, the slag is blocked, and the slag stopper essentially seals against the tapping hole, acting like a plug to seal the opening and prevent oxidizing slag from entering the ladle.

High-Quality slag products, commonly known as a slag hammer, slag blocking, or slag cone, is a product used during steel tapping in the converter steelmaking process.   The industrial slag blocking consists of a gyroscope-shaped refractory hammer head and a long refractory guide rod. The surface of the slag-blocking plug’s gyroscopic hammer head features three angular steel-tapping grooves. It is designed to withstand high temperatures and resist erosion by molten steel. The density of the slag-blocking plug falls between that of molten steel and slag, allowing it to float on the surface of the molten steel. Its surface structure breaks up vortices in the molten steel, preventing slag from being entrained in the vortices.   The long refractory guide rod is designed to provide guidance and positioning, as well as center-of-gravity balance. Guidance and positioning: After being dropped into the molten steel, the long rod first extends into the tapping hole, guiding the hammer head to align with the tapping hole, thereby preventing drifting or tipping; Center-of-gravity balance: The assembly is heavier at the bottom and lighter at the top, ensuring that the hammer head always remains upright at the steel-slag interface and does not invert and fail.

Metallurgical silicon carbide (SiC), commonly known as diamond sand, is a type of industrial silicon carbide that comes in black and green colors. Widely used in metallurgy, abrasives and grinding    tools, refractory materials, semiconductors, ceramics, new energy and other fields.   Metallurgical industry Abrasive grade silicon carbide has the functions of increasing silicon, increasing carbon, and reducing oxygen. Compared with traditional carbonization agents, ferrosilicon, and deoxidizers, the    deoxidization is more thorough, greatly increasing the concentration of molten steel. Compared to a single auxiliary material, the overall effect is improved and the overall cost is reduced.   Foundry industry Granular silicon carbide can optimize graphite morphology, refine crystal structure, and enhance the mechanical properties of castings.   Abrasive and grinding tools Silicon carbide has the characteristic of high strength. This characteristic can be used to produce grinding wheels, sandpapers, sand belts, oilstones, grinding blocks, grinding heads, grinding    pastes, as well as grinding and polishing of monocrystalline silicon, polycrystalline silicon, and piezoelectric crystals in the electronics industry in photovoltaic products.   High end ceramics&structural materials Silicon carbide ceramics belong to advanced ceramics, with advantages of high temperature resistance, wear resistance, corrosion resistance, and lightweight. In the industrial field, they include    kiln furniture, high-temperature crucibles, mechanical seals, wear-resistant pipelines, and pump body accessories; Civilian field: high-end kitchenware (wear-resistant non stick coating substrate),    bulletproof armor, aerospace lightweight structural components.   Semiconductor&Electronic New Energy High purity silicon carbide is the third-generation semiconductor core substrate, which has developed rapidly in recent years. It is used to produce silicon carbide wafers and power devices    (MOSFET, IGBT), with the characteristics of high voltage resistance, low loss, high temperature resistance, and good high-frequency performance; Main applications: New energy vehicle onboard power    supply, charging piles, photovoltaic inverters, rail transit, energy storage equipment, 5G base stations, are key materials in the new energy industry.

Introduction to black silicon carbide Metallurgical silicon carbide, commonly known as diamond sand, is synthesized artificially in industry. The naturally occurring silicon carbide, commonly known as moissanite, is rare in nature and difficult to develop. Artificially synthesized silicon carbide is produced by reacting quartz sand and carbon source at high temperatures above 2000 degrees Celsius. From the perspective of appearance and purity, it can be divided into two categories: black silicon carbide and green silicon carbide.   The morphology of abrasive grade silicon carbide Silicon carbide appears to be a solid crystal from the outside. Black silicon carbide is black/blue black in color and has a metallic luster. Green silicon carbide has a yellow green/emerald green color and a glassy luster. Stable structure, not easily deformed or broken. Not absorbent and odorless.   Properties of Silicon Carbide At room temperature: Silicon carbide has extremely strong chemical inertness, and is resistant to acid, alkali, and salt corrosion. It does not react with common acids and bases such as dilute sulfuric acid, dilute hydrochloric acid, and acetic acid. Long term storage in a dry environment without spoilage. Under high temperature conditions: it decomposes with molten steel, playing a role in deoxidation, carbonization, and silicon addition.

After adding silicon carbon powder to molten steel, it will float on the surface and accumulate dust, causing an unfriendly operating environment and incomplete reaction. In order to solve such problems, the ball pressing process has emerged, which compresses powdered materials into spherical shapes and then air dries or dries them to obtain silicon carbon alloy ball. This greatly improves the convenience of feeding. The metallurgical silicon carbon ball sinks to the bottom of the molten steel, reacts thoroughly, and improves the alloy recovery rate. Reducing costs and increasing efficiency is the demand of enterprises. With the development of the metallurgical industry, silicon carbon sphere can replace traditional silicon iron, silicon carbide, and carburizers at a lower cost. Silicon carbon alloy balls have good deoxidation effect, can also improve the hardness and toughness of steel, and can improve the graphitization performance of cast iron. Its low price reduces steelmaking and casting costs, its good deoxidation effect improves the quality of steel, and its convenient operation improves the working environment for employees. So silicon carbon alloy balls have been widely used.

Since April or May 2026, the domestic steelmaking industry has continued to promote low-cost upgrading and transformation, leading to an increase in demand for silicon carbon alloys in the market. The current price of silicon carbon alloy balls is relatively stable, and compared with traditional silicon iron, the cost is reduced. Widely used in major steel mills, it has become the mainstream auxiliary material for deoxidation and alloying in converter steelmaking. With the popularization of new cold pressing technology, metallurgical silicon carbon balls have higher strength and lower feeding loss, effectively improving the internal control quality of steel and the qualification rate of finished products. Silicon carbon sphere tend to become the preferred choice for reducing costs and increasing efficiency in steelmaking.   Advantages of silicon carbon alloy balls Deoxygenation efficiency: stable deoxidation, high deoxidation efficiency, long-lasting effect, small fluctuation of oxygen content in molten steel, and improved metallurgical yield. Cost reduction: By reducing the amount of alloy added, the raw material cost of silicon carbide is lower compared to silicon iron. Reduce steelmaking costs and increase economic benefits. Easy to operate: Silicon carbon alloy ball, easy to feed, good fluidity. After being put into the furnace, it disperses evenly and reacts uniformly. The current work line does not require any changes, and feeding is simple and convenient.

By 2025, the market size of environmentally friendly waterless cannon mud in China will reach 412 million US dollars, a year-on-year increase of 5.3%; It is expected to increase to $434 million by 2026, with a growth rate of over 5%. 1. The ultra-low emission transformation has come to an end, forcing an upgrade: The Ministry of Industry and Information Technology has clarified that by the end of 2026, key areas of steel will have basically achieved ultra-low emissions. Traditional tar based anhydrous gun mud will be accelerated to be phased out due to high VOC and benzo [a] pyrene exceeding standards, and water-based resin/inorganic combined environmentally friendly gun mud will replace the previous traditional tar based anhydrous gun mud. 2. Standard configuration for large blast furnaces: All blast furnaces with a capacity of over 2000m ³ in China have adopted waterless slag. For super large blast furnaces with a capacity of 4000-5800m ³, such as Baosteel, Hegang, and Ansteel, the iron consumption per ton is stable at 0.4-0.5kg, and the iron mouth depth is 3.0-3.5m, with a pass rate of over 98%, far superior to the consumption of water containing slag (with a unit consumption of over 1.2kg). 3. There is huge space for stock replacement: In the blast furnaces that have completed ultra-low emission transformation by 2025, the matching rate of environmentally friendly waterless gun mud will reach 86.7%, an increase of 9.2 percentage points compared to 2024; There are still a large number of small and medium-sized blast furnaces in the window period of technological transformation, and the demand for replacement will be concentrated and released in the next 2-3 years. Industry experts have stated that waterless blast furnace mud has transformed from an "optional refractory material" to a core material essential for efficient, safe, and environmentally friendly operation of blast furnaces. The industry has officially entered a new stage of high performance, environmental protection, and intelligence. Our factory is the original manufacturer, producing high-performance waterless gun mud. The waterless gun mud developed by the factory meets the requirements of high performance, high environmental protection, and provides competitive prices!

A slag blocking cone is a refractory product similar to a cone with a smaller diameter tilting rod, and has three steel tapping grooves. By using slag blocking cones, the composition of molten steel can be stabilized, the phenomenon of phosphorus recovery in molten steel can be reduced, the quality of molten steel can be improved, the absorption rate of alloy elements can be increased, and the consumption of refractory materials can be reduced. Therefore, slag blocking cones are very popular.     Working principle (3 steps)   Density difference suspension: Steel slag density<slag blocking hammer density<molten steel density, automatically floating at the interface between steel slag and molten steel.   Suppressing eddy currents: The hammer groove disperses the molten steel vortex, preventing steel slag from being drawn into the steel outlet.   Final sealing: put into operation when the steel tapping reaches 90% -95%; When the molten steel is running out, the hammer head sinks to block the steel outlet, leaving only the molten steel flowing out of the groove, and the steel slag is completely intercepted.      A slag blocking ball is a core metallurgical refractory material used in the steelmaking process of a converter to physically intercept slag during the tapping stage and prevent steel slag from flowing into the ladle. It is also a key component for achieving "slag free tapping".    

Core wire originated in the 1980s as an external refining technology developed from jet metallurgy. The original technology was to throw alloy blocks into steel and molten iron, sprinkle powder, and remove impurities from the steel, which could lead to problems such as high burning loss and low alloy recovery rate. The dust is large and does not meet the national environmental standards. Workers are required to operate it ,There are safety hazards in the working environment. The reaction is uneven and the quality is difficult to control. And the core wire solves these pain points, replacing extensive feeding. Core wire is a thin steel strip used to wrap deoxidizers, desulfurizers, and alloy powders (such as silicon calcium, calcium iron, carbon, rare earths, etc.), and then rolled into large coils. When working, a wire feeder is used to drive the steel deep into the molten steel, causing the steel strip to melt at high temperatures and release the wrapped material into the steel and molten iron for reaction, resulting in Impurities float to the surface and turn into slag, which is then scraped off. Thereby improving the purity of the molten steel. The advantages of core wire are also obvious: Significantly improve alloy yield Powder reacts more thoroughly deep in molten steel Wire feeding machine, easy to control operation process Small dust, environmentally friendly and safe operating environment   The technical specifications of our factory's core wire are: (1) Steel wire diameter: 13-13.5mm (2) Thickness of steel: 0.4 mm 0.2 mm (3) Powder content: 225g/m 10g/m (4) Powder/steel: 60/40. (5) Wire length: 5000-5500m. (6) Coil weight: 1000-1800kgs. (7) Coil width: 600-800 mm (8) Steel wire winding: horizontal (9) Packaging: In a plastic covered steel cage   The packaging method of our factory's core wire: 1. Vertical coils in steel cages on wooden (or steel) pallets, plastic shrink wrap, marked. Or according to customer requirements 2. The core wire is first packaged with steel strip, then wrapped with waterproof plastic film and protected with steel cage, and then wrapped with outer packaging