[SMM brief Review] the monthly production of ultra-pure Ferritic stainless steel in Jiuquan Iron and Steel Co., Ltd.

SMM11, 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.

In view of the other bottlenecks restricting the production capacity release of ultra-pure Ferritic stainless steel in each process, the company set up a key research team to make efforts to achieve the monthly output of ultra-pure Ferritic stainless steel from 9000 tons in September to 14000 tons. The person in charge of the company's production control department said that the stainless steel branch will continue to closely focus on the annual production and management objectives and tasks, adhere to the concept of safety first, environmental protection priority, quality first, and benefit-oriented, closely around the general direction of product structure adjustment, and make unremitting efforts to achieve the goal of "stable growth."

According to SMM research, Jiuquan Iron and Steel Co., Ltd., with an annual output of 1.2 million tons, 300 series and 400 series accounted for half of the output, as the 300 series profit narrowed to the loss expansion, Jiuquan Iron and Steel Co., Ltd. and 400 series production ratio adjusted to 4: 6, there are plans to further expand the production of 400 series, because the 400 series basically does not contain nickel, the price is low, it is relatively easy to open the market, is the main development and promotion of the steel plant.

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