Refractory materials for blast furnaces: The development of blast furnace ceramic cups by magnesia-carbon brick manufacturers is becoming more and more common. The price of magnesia-carbon bricks but the application of anti-corrosive refractory materials is required to ensure the extension of their service life. In addition to design changes, the material of refractory materials is the opposite. Great changes have also taken place, such as the use of microporous carbon bricks instead of ordinary carbon blocks in order to reduce the penetration of molten iron, used clay bricks as raw materials can better meet the requirements for the use of gunmetal at the tap hole, and the grouting method is used for blast furnace preparation. Lining repair can effectively prevent the hot air flow from scouring the lining, thereby extending the life of the blast furnace lining.

       Refractory for converter: In the steelmaking of converter, a water cooling technology and suspension system are applied in the upper cone part and lower barrel of the converter shell, respectively, so as to reduce the deformation of the converter body, extend the life of the converter lining, and improve the life of the converter. Converter productivity. The application of these new technologies has had a certain impact on the use of refractory materials, which has increased the converter furnace age to an average of more than 4,000 furnaces. In addition to spray repair, the application of high lime and dolomite, and the application of slag splashing furnace protection technology, Furnace age of more than 10,000 times is not a problem, this is a development direction that deserves attention in the production of refractory materials.

       Submerged nozzle for continuous casting: Due to the development of the continuous casting system, the tundish has changed from the previous transfer station to the current metallurgical container that affects the quality of cast steel and improves the productivity of cast steel. Therefore, many functional materials are gradually applied in the tundish. Such as slag weirs, impact plates, filters, argon blowers, etc.

       The immersion nozzle is an important functional refractory material for continuous casting. The research focus is mainly on two aspects, one is to improve the corrosion resistance of the slag line, and the other is to reduce the adhesion of the inner wall A12O3. The ZrO2 content is increased to 88%. And measures to optimize the particle size distribution can reduce the thermal expansion rate and porosity of the product, increase the density and improve the resistance to slag erosion. In addition, we must pay close attention to the technological progress of the user industry, such as the direct reduction iron that has emerged in recent years, and the requirements of new technologies such as DC electric arc furnace steelmaking on refractories.