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Key Information for Selecting Porous Plugs for Refining Ladles
The ladle porous plug is a critical functional component in the secondary refining process and a key material for bottom argon-blowing operations; it serves the following primary functions: (1) It helps regulate the temperature distribution of the molten steel within the ladle, ensuring the optimal casting temperature for the process. (2) Through gas-blowing agitation, it
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Refractory News, UncategorizedHow can the heat resistance of the medium-frequency furnace lining be improved?
The high-temperature performance of a furnace lining depends primarily on the physical and chemical properties as well as the mineralogical composition of the refractory materials used. Given the selection of raw materials, the sintering process is the critical step for achieving an optimal microstructure, thereby fully realizing the lining’s high-temperature capabilities. The degree of densification
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UncategorizedHow to distinguish between the permanent lining and the working lining refractories of a steel ladle
In steelmaking, the ladle is the core piece of equipment for holding and transporting molten steel; the stability of its refractory lining directly impacts safety, production pacing, and maintenance costs. However, technical and procurement staff at many steel plants often struggle to clarify the distinctions between the ladle’s permanent lining and its working lining: Can
The main reasons for furnace penetration at the converter tapping point
The converter taphole is a refractory channel in the converter. During tapping, molten steel is poured into the ladle through the taphole, as shown in Figure 1. When the taphole brick is partially damaged, the molten steel passes through the taphole brick and reaches the furnace shell area, causing the furnace shell steel plate at
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Refractory News, UncategorizedReuse of Recycled Material from Ladle Taps and Vent Seats in Corundum Castables
In the production processes of high-temperature industries such as steel, ceramics, cement, and glass, large quantities of refractory materials are consumed, resulting in a significant amount of waste refractory materials; in addition, the production of refractory products themselves generates a large amount of defective products and refractory waste. Of this massive volume of waste refractory
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Refractory News, UncategorizedCorundum-based ramming mass for filling around ladle well blocks and tundish nozzles
In recent years, the need to produce clean steel has led to longer residence times for molten steel in ladles and tundishes, imposing new requirements on the refractory materials used in steelmaking. To extend the service life of the working lining, steel plants commonly replace nozzle well blocks and gas-purging plug blocks and perform localized
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Refractory News, UncategorizedComposition, properties and construction steps of refractory ramming mix
Refractory ramming mix is a semi-dry, loose refractory material formed by ramming. It is usually made of high-alumina granules and fine powders in a certain gradation and with the addition of an appropriate amount of binder. During construction, it needs to be rammed vigorously to obtain a dense structure. Refractory ramming mixes have the following
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Refractory News, UncategorizedSelection of refractory materials for three parts: ladle lining, permeable bricks, and spray gun
Ladle refining is a new metallurgical process that has developed in recent years. Ladle refining involves moving almost all or part of the refining tasks—such as degassing, impurity removal, and composition and temperature adjustment—that would normally be performed in a traditional smelting furnace outside the furnace. Ladle refining of molten steel is also known as
Specific requirements for the use of medium-frequency furnaces
1.Areas where personnel congregate shall not be located within the zones designated for smelting, casting, and overhead crane operations (I) Major accident hazards in metallurgical enterprises: Locating areas where personnel congregate—specifically conference rooms, activity rooms, break rooms, control rooms, shift handover rooms, and changing rooms (including bathhouses)—or stations for the cold or hot repair of
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Refractory News, UncategorizedApplication technology and development trends of magnesia-carbon refractory materials for converters
This paper reviews the application technology, construction methods, and online maintenance and repair technology of magnesia-carbon bricks for converters. It analyzes the damage mechanism of magnesia-carbon refractories during use, discusses the development trends of low-carbon magnesia-carbon bricks and environmentally friendly rapid repair materials, and proposes relevant suggestions. Converters play a role in steelmaking, including decarburization,
Production Practice of 120t Double-Nozzle LF Refining Ladle
In response to the severe erosion of the lining of double-nozzle fully refined steel ladles, which affects the safe use of the ladles and restricts smooth production, this study investigated ways to extend the service life of double-nozzle fully refined steel ladles. Through the development and application of technologies such as composite lining construction, refining
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Refractory NewsA Comparison of Application Practices of Externally Mounted and Internally Mounted Permeable Bricks
The factory currently has five 210t converters, as well as refining equipment such as CAS, LF, and RH, producing a wide range of products including pipeline steel, automotive steel, shipbuilding steel, and silicon steel. Prior to 2009, the ladle refractory bricks used were internally packed. In the production of low-end steel grades and when the
How to handle steelmaking in a medium-frequency furnace
What is medium-frequency furnace steelmaking? Medium-frequency furnace steelmaking is a process that uses eddy currents generated by a medium-frequency magnetic field to melt scrap steel, which is then processed through continuous casting and rolling mills to produce steel products. The products resulting from this process are no longer the “substandard steel bars” of the past.
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UncategorizedSharing measures to reduce production costs per ton of steel by covering the ladle throughout the converter process
Reducing the production cost per ton of steel is an effective way for steel companies to improve their competitiveness. Minimizing controllable heat loss within the ladle is an effective measure to reduce production costs and save energy. By covering the ladle and using corresponding cover-opening devices, radiative heat loss is significantly reduced. The ladle is
How to improve the quality of electric furnace cast iron?
Given the unique characteristics of electric furnace cast iron smelting, foundry professionals must update their thinking in many areas—including cast iron composition selection, charge composition, scrap steel usage, inoculation processes, carbon enrichment and de-carbonization, sulfur enrichment and de-sulfurization, spheroidization processes, creep hardening processes, temperature control, and pouring techniques—and adopt practical measures to ensure and improve
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Refractory NewsElectric furnaces commonly use four different types of refractory material for furnace covers
Electric furnace covers are subjected to both high temperatures and frequent rapid heating and cooling, placing high demands on refractory materials. The refractory materials used in electric furnace covers in my country have evolved from initially using large, specific silica composite bricks, to non-fired high-alumina bricks prepared with various binders (water glass, phosphoric acid, aluminum
Construction and masonry scheme for refractory materials for converter lining
As a core piece of equipment in steelmaking, the quality of the converter lining construction directly determines its service life and production efficiency. This solution combines advanced domestic and international experience to construct a systematic solution from three dimensions: material selection, process optimization, and quality control. It focuses on addressing the differences in working conditions
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UncategorizedDesign of the roof, hearth, and furnace chamber of steelmaking electric arc furnaces, and the configuration of refractory materials
The design of the electric furnace, as well as the selection and arrangement of the refractory materials used for its lining, significantly influence the operating cycle of the converter. The following details the design of the electric furnace’s roof, hearth, and furnace chamber, along with the configuration of the refractory materials utilized for the lining.
What preparations are needed before suturing the lining of a medium-frequency induction furnace?
1.Check the furnace body’s operating condition This includes the inspection and treatment of the furnace body yoke, hydraulic system, water cooling system, induction coil and its insulating varnish, coil paste, and empty furnace test. (1) Visually inspect the furnace body yoke fastening screws for looseness. If loose, they must be tightened. At the same time,