ASG 11, June 22: according to Jiuquan Iron and Steel Daily, in the past October, the monthly output of ultra-pure Ferritic stainless steel in Hongxing stainless Steel Branch exceeded 14000 tons, reaching an all-time high. Ultra-pure Ferritic stainless steel has excellent corrosion resistance, heat resistance, weldability and processing properties, widely used in automotive exhaust systems, architectural decoration and other fields, since the success of research and development has been the focus of stainless steel branch products. However, limited by raw and auxiliary materials and other reasons, production capacity has been unable to be released, monthly smelting volume has hovered around 8000 tons for a long time.

"Ultra-pure ferrite smelting requires a high quality of lime." Li Guoxian, deputy section chief of the production and Control Section of the plant, said that in order to ensure the quality of lime used for VOD furnaces, the factory assigned special personnel to participate in the whole process of mining, transportation and firing of lime for VOD furnace. through strict control of each link, the quality and quantity of lime for VOD furnace has been effectively guaranteed. In addition to using special lime, VOD furnace also has special refining ladle. "the smelting times of refining ladles also have a great impact on the release of VOD capacity, so the steelmaking branch sends people to work with the technical staff of the refractory company to solve the problem of refractories." According to Ruan Jiazeng, director of the steelmaking branch of the company, in the past year, stainless steel branch has repeatedly tested refractory materials and masonry methods, optimized the VOD smelting process, made a breakthrough in the bottleneck, and doubled the refining times of VOD special refining ladles. Through the technical research on the slow cooling time and grinding time, the technical personnel can reduce the storage time of the slab in the heat preservation pit on the premise of ensuring the quality, optimize the production organization of each link, reduce the grinding time, and strive to improve the turnover efficiency and maximize the use efficiency of the heat preservation pit.