1. "Development and application of long-life andalusite self-flowing castables"
Aiming at the problems of cracking, spalling and short service life of permanent layer materials in tundish during service, the project developed red pillar with excellent thermal shock resistance, volume stability and high temperature comprehensive performance by using andalusite and high-grade bauxite as main raw materials, low cement combination, composite micro-powder and high-efficiency water reducer, and continuous expansion of different granularity andalusite raw materials at high temperature. Stone self-flowing castable. After testing by Henan Provincial Institute of Product Quality Supervision and Inspection, the product performance indicators meet the requirements of Q/PPG003-2018 enterprise standards. It has been used by many customers, such as Korean Modern Iron Making and Benxi Steel Plate. The product has stable performance, good use effect, more than doubled service life, and meets the user's requirements. The products have been produced in batches with advanced technology, stable quality, remarkable economic and environmental benefits.
Experts believe that the information is complete and accurate, and the results have reached the international advanced level. It is suggested that a series of products should be developed to expand the scope of application.
2. "Development and Application of Long Life Low Carbon Magnesium Carbon Bricks for Clean Steel Refining Ladle Slag Line"
Aiming at the problems of magnesia-chromium, high carbon-magnesia-carbon materials used in ladle slag line of clean steel refining, such as chromium pollution, carburization of molten steel and short service life, the project takes low iron, low silicon, high purity and large crystalline magnesia as the main raw material, and develops low carbon magnesia-carbon materials with excellent high temperature properties such as oxidation resistance, corrosion resistance and thermal shock resistance by optimizing antioxidants and introducing composite low expansion additives. Material. After testing by Henan Provincial Institute of Product Quality Supervision and Inspection, the product performance indicators meet the requirements of Q/PPG010-2018 enterprise standards. It has been used by Mukand Steel Works of India, Xining Special Steel and Jingtang Steel of Shougang. The product has stable performance and its service life is 30% longer than that of magnesia-chrome bricks. The chromium-free process has been realized and the requirements of users have been met. The products have been produced in batches with advanced technology, stable quality, remarkable economic and environmental benefits.
Experts believe that the information is complete and the data are abundant, and its results have reached the international leading level in the application effect of VOD ladle. It is suggested to speed up the popularization and application.