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The role of the long nozzle in the protective casting process from the tundish

The long nozzle is a refractory channel connecting the ladle and the tundish. Its invention and application have played a pivotal role in the development of continuous casting technology and are closely linked to the effectiveness of protective casting from the tundish; specifically, it prevents secondary oxidation and contamination—originating from air, slag, refractory materials, or […]

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Performance Requirements and Future Development Trends of Ladle Porous Plugs

Installing a gas-permeable plug at the bottom of a steel ladle allows for the injection of inert gas to stir the molten steel; this process promotes the flotation of inclusions into the slag layer and homogenizes the steel’s composition and temperature. Consequently, the gas-permeable plug serves as a critical functional component in ladle refining. As

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Mechanisms of nodule formation in submerged nozzles and optimization measures

In the continuous casting process, the submerged nozzle is located below the ladle and above the mold, serving as a passageway for molten steel and regulating its flow. The submerged nozzle directly influences the flow velocity and flow field distribution of molten steel within the mold. When producing high-quality steel grades such as aluminum-killed steel,

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Are there any specific requirements for installing refractory castables in winter?

With temperatures dropping recently, many construction projects have been affected. While refractory products are generally less affected, today we’ll focus on unshaped refractory castables. We’ve previously discussed precautions for installing refractory castables in winter. Some companies may consider these less important, but in fact, several national standards contain specific regulations regarding the winter installation of

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Improving these properties of low-carbon magnesium carbon refractories using nanotechnology

The main raw materials for magnesia refractories are magnesite, dolomite, and brucite. These minerals are abundant in my country’s natural resources, primarily distributed in coastal areas such as Liaoning, Shandong, and Hebei provinces, providing a favorable resource foundation for the development of magnesia refractories in my country. This has made China the world’s largest producer

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Practices to reduce refractory material consumption in converter turnkey projects

The use of refractory materials for converter linings directly affects the safety, operation, and production of steel plants, and significantly impacts steelmaking costs. Advanced steel plants and refractory material suppliers consider converter refractory material consumption as a key performance indicator. Currently, the most intuitive and scientific way to measure converter refractory consumption is by ton-of-steel

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Damage mechanism of medium-frequency furnace lining and design solutions to extend its service life

During the operation of medium-frequency furnaces, the refractory material used for the furnace lining is only 70-110mm thick. The inner side is in contact with the high-temperature molten metal, while the outer side is in close contact with the water-cooled coils. This results in a significant temperature difference between the inner and outer sides of

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Application of magnesia rammed refractories in oxygen-enriched side-blown processes

Magnesium rammed refractories are produced using an oxygen-enriched side-blown melting pool process. The primary equipment consists of an oxygen-enriched side-blown melting pool furnace, a settling electric furnace, and a continuous refining furnace, arranged sequentially from highest to lowest temperature. The molten material flows through channels between each furnace. This process represents a new, highly efficient,

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Construction process for integral casting of slag channel lining

The use of inorganic non-metallic wear-resistant materials such as SiC, corundum, and high-alumina ceramics instead of alloy metal wear-resistant materials has achieved excellent results in industries like cement and metallurgy, with significant economic benefits. Considering the operational characteristics of slag channel linings—which endure long-term exposure to acidic media and intense erosion—the selected high-strength acid-resistant wear-resistant

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Comprehensive construction guide for winter-resistant refractory castables

Refractory castables, as the key lining material for industrial furnaces, directly impact the service life of thermal equipment and production safety through their construction quality. During winter construction in low-temperature environments, material performance, construction techniques, and quality control face significant challenges. This guide systematically presents a comprehensive technical solution for winter refractory castable construction. It

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