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The maintenance of the blast furnace tap hole directly impacts the furnace's productivity, operational efficiency, safety, and longevity—making it a critical component in modern blast furnace operations. Addressing the challenges of difficult tap-hole maintenance during both high-melting operations and the later stages of furnace campaigns, Zhengzhou Kexin Furnace Materials Co., Ltd. has developed a new type of repair mud by incorporating innovative additives, introducing spherical ultrafine powders, and optimizing the structure of the gunning material. This product offers significant advantages in restoring and stabilizing tap holes, easily forming a robust mud pack that effectively protects the furnace wall, thereby enhancing the qualified rate of tap-hole depth. It also boasts features such as easy opening, stable tap-hole depth, and extended iron-flow duration.
Blast furnace tuyere spouting has long been a persistent and challenging issue plaguing ironmaking production for many years. Zhengzhou Kexin Furnace Materials Co., Ltd., in collaboration with the blast furnace’s design institute, construction teams, and leading ironmaking experts, has developed a unique and highly effective product and solution package. This includes insights into the root causes of spouting, the specific locations where it occurs, as well as the underlying principles and comprehensive measures for addressing this problem. Building on this robust theoretical foundation, Zhengzhou Kexin Furnace Materials Co., Ltd. has successfully created its anti-spouting gunning mix—developed specifically based on real-world experiences gained from nearly two dozen blast furnaces. The company can now tailor, design, and produce customized anti-spouting gunning mixes to suit the unique conditions of each blast furnace, ensuring precise treatment that delivers rapid and tangible results.
The blast furnace smelting intensity has been steadily increasing, leading to new challenges in the tap hole area, such as high temperatures, severe erosion, and intense scouring. As a result, traditional furnace muds can no longer effectively maintain stable tap hole depth, ensure clean slag and iron discharge, or prevent accelerated damage to refractory materials in the tap zone. To address these issues, Zhengzhou Kexin Furnace Materials Co., Ltd. has developed a cutting-edge solution by carefully selecting high-quality, stable raw materials, scientifically optimizing the formulation, incorporating innovative ingredients, and creating a novel high-temperature, high-strength bonding phase. The company’s newly developed high-strength, anhydrous furnace mud boasts exceptional performance, including stable tap hole depth, smooth opening, extended tapping intervals, and remarkably low consumption rates—just 0.1 ton of mud per ton of iron produced.
Used to seal the iron tapping hole of blast furnaces, it plays an indispensable role in ensuring high and stable furnace productivity, improving labor intensity and working conditions at the furnace front, extending the service life of the blast furnace, and achieving cost reduction, efficiency gains, and sustainable, low-carbon operations. Zhengzhou Kexin Furnace Materials Co., Ltd. can design customized water-free gunning materials tailored to specific user requirements—such as furnace capacity, operational practices, and technical specifications—to better meet customer needs and maximize value creation for clients. Zhengzhou Kexin Furnace Materials Co.'s water-free gunning materials boast exceptional features, including smooth gunning performance, excellent filling properties, robust maintenance capabilities for the iron tap hole, minimal risk of tap-hole breakage, leakage, or seepage, easy opening, superior resistance to erosion, steady iron flow during tapping, stable tap-hole conditions, and significantly improved furnace-front environments and reduced labor intensity.
Used to seal the iron tapping hole of blast furnaces, it plays an indispensable role in ensuring high and stable furnace productivity, improving labor intensity and working conditions at the furnace front, extending the service life of the blast furnace, and achieving cost reduction, efficiency gains, and sustainable, low-carbon operations. Zhengzhou Kexin Furnace Materials Co., Ltd. can design customized water-free gunning materials tailored to specific user requirements—such as furnace capacity, operational practices, and technical specifications—to better meet customer needs and maximize value creation for clients. Zhengzhou Kexin Furnace Materials Co.'s water-free gunning materials boast exceptional features, including smooth gunning performance, excellent filling properties, robust maintenance capabilities for the iron tap hole, minimal risk of tap-hole breakage, leakage, or seepage, easy opening, superior resistance to erosion, steady iron flow during tapping, stable tap-hole conditions, and significantly improved furnace-front environments and reduced labor intensity.
The blast furnace smelting intensity has been steadily increasing, leading to new challenges in the tap hole area, such as high temperatures, severe erosion, and intense scouring. As a result, traditional furnace muds can no longer effectively maintain stable tap hole depth, ensure clean slag and iron discharge, or prevent accelerated damage to refractory materials in the tap zone. To address these issues, Zhengzhou Kexin Furnace Materials Co., Ltd. has developed a cutting-edge solution by carefully selecting high-quality, stable raw materials, scientifically optimizing the formulation, incorporating innovative ingredients, and creating a novel high-temperature, high-strength bonding phase. The company’s newly developed high-strength, anhydrous furnace mud boasts exceptional performance, including stable tap hole depth, smooth opening, extended tapping intervals, and remarkably low consumption rates—just 0.1 ton of mud per ton of iron produced.
Blast furnace tuyere spouting has long been a persistent and challenging issue plaguing ironmaking production for many years. Zhengzhou Kexin Furnace Materials Co., Ltd., in collaboration with the blast furnace’s design institute, construction teams, and leading ironmaking experts, has developed a unique and highly effective product and solution package. This includes insights into the root causes of spouting, the specific locations where it occurs, as well as the underlying principles and comprehensive measures for addressing this problem. Building on this robust theoretical foundation, Zhengzhou Kexin Furnace Materials Co., Ltd. has successfully created its anti-spouting gunning mix—developed specifically based on real-world experiences gained from nearly two dozen blast furnaces. The company can now tailor, design, and produce customized anti-spouting gunning mixes to suit the unique conditions of each blast furnace, ensuring precise treatment that delivers rapid and tangible results.
The maintenance of the blast furnace tap hole directly impacts the furnace's productivity, operational efficiency, safety, and longevity—making it a critical component in modern blast furnace operations. Addressing the challenges of difficult tap-hole maintenance during both high-melting operations and the later stages of furnace campaigns, Zhengzhou Kexin Furnace Materials Co., Ltd. has developed a new type of repair mud by incorporating innovative additives, introducing spherical ultrafine powders, and optimizing the structure of the gunning material. This product offers significant advantages in restoring and stabilizing tap holes, easily forming a robust mud pack that effectively protects the furnace wall, thereby enhancing the qualified rate of tap-hole depth. It also boasts features such as easy opening, stable tap-hole depth, and extended iron-flow duration.
Zhengzhou Kexin Refractory Materials Co., Ltd.'s vanadium-titanium mud contains special, highly effective additives that more effectively protect the refractory materials in the iron tap area during the later stages of blast furnace campaign life, forming a stable mud pack while reducing temperatures in the tap region. This ensures the safe and long-lasting operation of the blast furnace, aligning with industry goals for enhanced durability. The product has been successfully implemented across multiple medium- to large-scale blast furnaces, resulting in a significant increase in the qualification rate of iron taps and a noticeable drop in refractory temperatures within the tap area—providing robust assurance for the safe and reliable operation of these critical systems.
This product features a binder and admixtures developed with independent intellectual property rights, ensuring that the anhydrous gunning material produces no harmful substances detrimental to human health during use. Developed by Zhengzhou Kexin Refractory Materials Co., Ltd., this environmentally friendly gunning material boasts domestically leading technology and has been rigorously tested in numerous blast furnaces both domestically and internationally. It not only meets—yet exceeds—Europe’s and America’s stringent environmental standards but also delivers exceptional performance: smooth application, rapid coke-solidification, superior tap-hole quality, high bonding strength, and complete safety for workers’ health.
Zhengzhou Kexin Refractory Materials Co., Ltd.'s resin-based ramming mass is manufactured using a proprietary resin binder developed in-house. This product boasts excellent plasticity, smooth application, precise iron tap depth, moderate opening strength, and low consumption per ton of iron produced. It has not only demonstrated outstanding performance in overseas blast furnaces but has also earned high praise from customers using single-tap and continuous-tap blast furnaces domestically—offering exceptional value for money.
Magnesia-based gunning material
Zhengzhou Kexin Refractory Materials Co., Ltd. uses high-purity, premium-quality MgO, alumina, corundum, magnesia-alumina spinel, and magnesia-based plasticizers as primary raw materials, combined with environmentally friendly carbon binders and resins through a mixing and kneading process. This product boasts excellent thermoplasticity and an ideal drying-curing time, ensuring that the magnesia-based gunning mix exhibits outstanding creep behavior at high temperatures in slag-iron tapping openings. As a result, it easily forms a stable, dense mud layer that effectively protects the refractory materials in the slag-iron tap area. Moreover, the magnesia-based gunning mix reacts with MgO, FeO, and SiO₂ present in the molten slag and iron to form high-melting-point compounds, significantly enhancing the material's resistance to erosion and scouring by the molten slag and iron.
Anhydrous ramming mass for submerged arc furnaces
The Submerged Arc Furnace (SAF) uses arc and resistance heating to convert electrical energy into thermal energy, reducing metal oxides in ores within a closed or semi-closed environment. It is a core piece of equipment in the metallurgical industry, essential for high-temperature reduction smelting processes, and is primarily used to produce ferroalloys (such as ferrosilicon, ferromanganese, and ferrochrome), calcium carbide (CaC₂), yellow phosphorus, and other key products.
Water is used to mix refractory clay, alumina clinker, metallurgical coke, silicon carbide, and asphalt into a pliable sealing material with consistent plasticity. Water-based gunning mass is primarily used to seal the tapping holes of small blast furnaces and electric arc furnaces, making it ideal for smelting scenarios with low furnace pressure and infrequent iron tapping operations. Zhengzhou Kexin Furnace Materials Co., Ltd. has developed a water-based gunning mass that features low moisture content, excellent plasticity, strong bonding performance, and an extended shelf life.
Some customers require uniform flow rates during iron tapping, contamination-free smelting products, and a healthy, environmentally friendly working environment. Zhengzhou Kexin Furnace Materials Co., Ltd. has tailored its production process—using high-quality, eco-friendly raw materials and employing scientific design—to meet these exacting demands. As a result, the company’s environmentally friendly iron tap mud ensures consistently controlled iron flow rates, eliminates pollution and splashing during tapping, and prevents the release of harmful substances during both opening and closing operations.
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Contact Information
Address: Fangshan Village, Micheng Town, Xinmi City, Henan Province
Phone:+86-371-63126179 / +86-13938251125
Fax:+86-371-63126179
Email:zzkxllzhb@sina.com
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