The aggregate for magnesia-carbon bricks used in ladle slag lines is generally ordinary fused magnesia with a MgO mass fraction of ≥97.5% or ≥98% (97.5% MgO mass fraction) or 98% (98% MgO mass fraction). However, in refining processes where the conditions are more demanding, large-crystal fused magnesia is often used. The carbon mass fraction is […]

The use of sliding plate slag blocking in converter tapping is one of the most advanced methods internationally, and also one of the most challenging slag-blocking technologies. The refractory material of this system mainly consists of five major refractory elements: the tapping nozzle brick, the inner nozzle brick, the upper sliding plate, the lower sliding

1.The application and features of the overall stopper rod At present, the common aluminum-carbon integral stopper rods have rod heads made of high-aluminum-carbon, aluminum-zirconium carbon, magnesium-carbon or other materials. Units 5 to 10 used aluminum-carbon-zirconium integral plug rods before 2011, which were used in conjunction with the nozzles. The liquid level control of the mold

A novel anti-oxidation coating was applied to magnesia-carbon brick samples for laboratory testing and then applied to magnesia-carbon bricks in the slag line of a steel ladle for on-site testing. The results showed that below 1100℃, the coating provided excellent anti-oxidation protection for the magnesia-carbon brick samples, with the loose layer and decarburized layer thicknesses

The effects of carbon content variation on the slag resistance, oxidation resistance, high-temperature flexural strength, and thermal shock stability of magnesia-carbon bricks were investigated. The results indicate that as carbon content increases, the bulk density and compressive strength of the magnesia-carbon bricks decrease. When carbon content ranges between 6% and 8%, the bricks exhibit superior

Samples of the stopper rods for continuous casting ladles produced by a certain factory were analyzed, examining the structure and composition of the rod body, rod tip, oxidation-resistant coating, and anti-adhesion coating. Results indicate: The outer layer of the stopper head contains a higher proportion of granular aggregates and exhibits a denser structure than the

1.Causes of leakage accidents at the ladle outlet of converter: Leakage incidents at the ladle outlet of a converter are often closely related to multiple factors. Experienced technicians indicate that the following aspects are the primary causes of such accidents: (1) Insufficient sintering of the refractory lining in the tapping nozzle caused refractory material spalling

The measures to extend the life of the taphole are as follows: (1) Reduce the amount of slag discharged at the beginning and end of tapping (Figure 5-2). At the same time, a slag blocking process should be used to block the slag during tapping. (2) If necessary, the slag can be reversed from the

The converter’s sliding plate slag-blocking technology, currently the most widely used and challenging, is used for steel tapping in converters. The refractory material in this system primarily consists of five components: the taphole brick, inner nozzle brick, upper slide, lower slide, and outer nozzle brick. The converter slide is a key component in this technology.

The signal is fed back to the control system through the detector, which controls the digital electric cylinder and linear slide actuator to effectively control the molten steel flow in the tundish. 1.Monoblock Stopper 1.1Functions of Stoppers During continuous casting, they stabilize the steel flow, reduce impact and agitation on the mold, stabilize pouring operations,

Steel leakage accidents in the sliding nozzle mechanism typically occur in the following five locations: The specific reasons may include the following problems: 1.Sliding gate mechanism reasons (1) The sliding mechanism can be significantly deformed due to prolonged use in high temperatures or accidental collisions during operation. This can lead to uneven force distribution across

Magnesia carbon bricks are a new type of refractory material that emerged in the 1970s. Made from high-temperature sintered or fused magnesia and carbon, and using various carbon binders, these unfired refractory materials retain the advantages of carbon-based refractories while overcoming the inherent shortcomings of alkaline refractories, such as poor spalling resistance and slag absorption.

Magnesia carbon bricks were first developed in Japan as a refractory product. Practical trials began in electric furnaces in 1970, and after six years of testing, they were officially introduced. In 1977, Kawasaki Steel’s Chiba Works in Japan introduced the Q-POB converter, featuring resin-bonded, unfired MgO-C (graphite) refractory materials for the converter’s hearth and tuyere.

In high-temperature industrial fields such as steel, metallurgy, and ceramics, the energy consumption of industrial furnaces has always been a core pain point that restricts corporate benefits. According to statistics, the average thermal efficiency of industrial furnaces in my country is only 30%-40%, of which the heat dissipation loss of the furnace lining accounts for

The tundish is the last container in the continuous casting system where the molten steel contacts the refractory material before it is formed. It is an important part of the continuous casting process and has a great impact on the quality of steel. With the advancement of smelting technology and the emergence of ladle secondary

In modern iron and steel metallurgical production, the ladle plays a vital role as a key equipment connecting the steelmaking furnace and the continuous casting machine. It is not only used to store and transport high-temperature molten metal, but also an important place for molten steel refining, composition adjustment and temperature control. However, the working

In steel continuous casting, tundish nozzle can control the flow of steel injected into the crystallizer from the tndish as well as the melt flow behavior in the crystallizer. When used in conjunction with protective slag, sub entry nozzle can avoid secondary oxidation of the liquid steel, which has a significant effect on improving labor