Refractory News

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

Out-of-furnace refining has become an important part of the modern steelmaking process, and argon blowing at the bottom of the ladle is an important part of out-of-furnace refining. The ladle purging plug are the key components to complete this process, and steelmaking manufacturers pay special attention to it. A good breathable brick should have the

Heating furnaces and reverberatory furnaces are high-temperature equipment, and the lining masonry cannot be separated from refractory materials. Reverberatory furnaces are traditional equipment for heating materials in the furnace or completing smelting processes such as oxidation and reduction. Large continuous heating furnaces are high-temperature furnaces used to heat steel billets. There are many varieties, but

The tundish is named because it is located between the ladle and the continuous casting machine during operation. It is also called the middle ladle or the intermediate tank. There are many types of tundishes, and the common shapes are rectangular and T-shaped. The construction of the tundish is also varied. The permanent layer can

Heavy refractory bricks are high-temperature and wear-resistant refractory materials with high operating temperatures. They are mostly used as working layers or permanent layers of industrial kilns to prevent high-temperature solutions from damaging the kiln body and protect the insulation layer materials. Lightweight refractory bricks are heat-insulating bricks with low operating temperatures. They are mostly used

Refractory materials are the foundation of all high-temperature industries, with a wide variety of applications. This article summarizes the application of refractory materials in four major downstream industries: steel industry, cement industry, non-ferrous metal smelting industry and glass industry, including the selection of different types of refractory materials for high-temperature equipment such as blast furnaces,

The induction furnace is the main equipment in the casting and heat treatment workshop. The stability, reliability and safety of its operation are the guarantee for the normal and stable operation of the casting and heat treatment production line in the flow operation. The induction furnace has good development prospects in the field of thermal