The application of top-bottom combined blowing technology and slag splashing technology in converters has expanded converter smelting products and significantly improved quality and production efficiency. However, tapping, the final step in the converter steelmaking process, has become a crucial factor influencing smelting quality, output, and product variety. The service life, replacement time, and repair life …

Development and application of new converter taphole repair material Read More »

Currently, most continuous casting shrouds in domestic steel mills are used directly without preheating. Upon contact with the molten steel at the start of pouring, the inner surface of the shroud instantly rises to the molten steel’s temperature, while the outer surface, exposed to the atmosphere, is much cooler. This generates significant thermal stress within …

Requirements for submerged nozzles and anti-clogging improvement measures Read More »

Overview of bottom-blown air-permeable bricks Since the 1960s, the ladle secondary refining process has been used by various steel producers. Production practice has proven that secondary smelting in the ladle is difficult without effective inert gas treatment. Initial inert gas stirring was achieved using a top-blown argon lance, but its stirring effect was significantly limited, …

Requirements for physical and chemical indicators of bottom-blown air bricks and base bricks for refining ladles Read More »

Current status and problems faced by cord steel Cord steel is made from specialized high-carbon steel wire rods, drawn multiple times to form fine steel wires with unit diameters ranging from 0.15 to 0.38 mm. These wires are then twisted into strands to form a steel wire product. Tires with a metal mesh made of …

Advantages and disadvantages of refractory materials for smelting ladle Read More »

The ladle (or steel ladle) carries the dual tasks of transporting molten steel and performing refining outside the furnace. With the advancement of steelmaking technology, my country’s ladle refractory materials have also made great progress. Especially since the 1980s, my country’s refractory research institutions, production enterprises, and end-users have worked closely together, taking into account …

Detailed classification of 5 common refractory materials for ladle Read More »

With the rapid development of industrialization, the amount of refractory waste, a core consumable in high-temperature industries such as steel, cement, and glass, has been increasing year by year. According to data, China produces approximately 8-9 million tons of waste refractory materials annually, but only about 30% is utilized. Efficiently reusing this waste has become …

Analysis on the recycling methods of waste refractory materials Read More »

The tundish is a refractory container that first receives the molten steel poured from the ladle and then distributes it to each crystallizer through the tundish water outlet. Its functions are: (1) Reduce the static pressure of the molten steel, maintain a stable molten steel level in the tundish, and inject the molten steel into …

The role and function of steelmaking tundish Read More »

Refractory materials, as their name suggests, can maintain their physical and chemical stability at extremely high temperatures. Not only are these materials resistant to high temperatures, they are also effective against thermal shock and chemical erosion, making them the preferred materials for heating furnace linings and working surfaces. However, refractory materials are not a single …

Classification and selection of refractory materials used in heating furnaces Read More »

During the pouring process of refractory castables, how to leave expansion joints mainly depends on the following 5 key points: 01 Contraction and expansion of refractory castables During the first heating process, refractory castables will shrink twice during dehydration at 50℃～200℃ and sintering at 900℃～1000℃. In other temperature ranges, heating will cause the castable to …

Expansion joints during pouring of refractory castables Read More »

By analyzing the composition of refractory materials in the tundish and the refractory damage problems that occur in daily work, we have identified the causes and proposed solutions to ensure the safe use of refractory materials. In continuous casting, a tundish is used to hold and transfer molten steel. The molten steel from the ladle …

Use and management of tundish refractory materials Read More »

There are many types of unshaped refractory materials, such as refractory castables, refractory plastics, refractory ramming materials, refractory spray coatings, refractory projection materials, refractory mud, etc. Although they are all unshaped refractory materials, they have different material formulas, different particle ratios, different construction methods, different application parts, different target functions, and even more different refractory …

The difference between refractory castables and refractory plastics Read More »

What are the functions of the tundish? What are the requirements for refractory materials? (1) The tundish is a container that mainly receives, stores and redistributes ladle water. Tundish metallurgical technologies such as adjusting temperature, adjusting trace alloy elements, and improving inclusions are now gradually developed. (2) The requirements for refractory materials are that the …

What refractory materials are used in continuous casting tundish？ Read More »

(1) Chemical attack, including silicon dioxide (SiO2), iron oxide (FeO), and carbon (C). Since the source molten iron contains a large amount of silicon, it is oxidized to produce acidic oxide silicon dioxide after blowing. When a new furnace is opened for smelting, it takes a certain temperature and time for the lime to melt …

Analysis of chemical and physical erosion mechanism for AOD lining refractories Read More »

After shoveling the material flat with a shovel, step on it with your foot to remove the air, insert the steel drill into the material and shake it repeatedly, and then use your foot to further solidify. The thickness of each layer of the dry ramming material should be 150~200mm. , And then use a …

Construction steps of dry ramming material at the bottom of electric furnace Read More »

In order to further promote the research on converter steelmaking technology, exchange the application experience of converter high-efficiency and low-cost steelmaking furnace protection technology, and promote new long-life, high-efficiency and environmentally friendly converter furnace protection materials and technologies, we invited well-known experts in the steelmaking industry and enterprise expert representatives to discuss and discuss hot …

New furnace protection technology to increase converter production and efficiency Read More »

Refractory materials are basic materials for high-temperature technology. They are closely related to the development of high-temperature technology, especially the high-temperature smelting industry. They are interdependent, mutually promoted, and developed together. So what are refractory materials? It generally refers to materials and products that are mainly composed of inorganic non-metallic materials and have a refractoriness …

Definition and types of refractory materials Read More »

Crucible furnace lining is a key component of medium frequency furnace, crucible furnace lining can be divided into three categories of acidic furnace lining, alkaline furnace lining and neutral furnace lining according to the composition, and the use of which kind of furnace lining should be fully considered the production process and the composition of …

Generation and prevention of neutral lining defects in 20t medium frequency furnace Read More »

The construction of refractory plastic is rammed with a tamping machine or a pneumatic pick. The construction of refractory ramming materials is similar to it. 1.Construction preparation According to the design requirements, the furnace steel structure, reference line and holes and other parts shall be fully inspected and accepted, and construction can only be carried …

The most comprehensive introduction to the construction of refractory plastics and ramming materials Read More »

Indefinite refractory material is a kind of refractory material that can be used directly without firing, which has the advantages of fast construction, simplified process, energy saving, good integrity, easy to replace, etc., and is widely used in metallurgical field. Among them, pummeling material is a kind of indefinite refractory material which is constructed by …

Theoretical basis for the application of magnesium refractory pounding materials Read More »

High-aluminum refractory materials have high stability against blast furnace slag, molten iron erosion, and wear at high temperatures, and are inert to carbon monoxide. However, in alkaline media, when working under high temperature conditions, it is found that corundum is converted into β-alumina. This conversion is accompanied by a 20% increase in volume, which leads …

How to choose refractory materials for blast furnaces in ironmaking production Read More »