Ultra high power direct-current arc furnace deoxidation furnace-protective agent, making method and use thereof

Abstract

The invention relates to a deoxidation furnace protective agent for an ultrahigh power direct current electric arc furnace, a method for manufacturing the same and an application of the deoxidation furnace protective agent. The deoxidation furnace protective agent comprises the following compositions in percentage by weight: 15 to 25 percent of total carbon, 38 to 55 percent of MgO, 15 to 25 percent of SiC, more than or equal to 3 percent of metallic aluminum, 4 to 10 percent of CaO, more than or equal to 6 percent of metallic iron and 0.05 to 0.2 percent of H2O; the manufacturing process is simple and comprises the following steps that: firstly, materials are weighed according to the mixture ratio, added with 7 to 9.5 weight percent of wedding agent and molded by a ball forming mill to manufacture a rugby-shaped product with a density of more than or equal to 1.8 g / cm<3>. In proportioning, aluminium scraps, carborundum, sponge iron and graphite adopt a parallel mode and have a weight mixture ratio of 1:4 - 6:1 - 2: 4- 6; in the whole smelting process, the deoxidation furnace protective agent is added for three times according to a proportion of 4 to 3 to 3 in order that the total iron content in the slag is reduced from average 40 percent to 10 to 15 percent around, thereby prolonging the service life of a furnace brick lining and a furnace cover and reducing elecrictiy consumption.

Description

technical field [0001] The invention relates to a deoxidizing furnace protection agent for ultra-high-power DC electric arc furnace steelmaking, a production method and application thereof, belonging to the field of electric furnace steelmaking. Background technique [0002] The development of electric arc furnace steelmaking technology has a history of more than 100 years. Although it has always faced challenges and competition from other steelmaking methods, especially the impact of high-efficiency oxygen converter steelmaking, the output of electric arc furnace steelmaking is still rising rapidly, especially After the continuous improvement of EAF steelmaking technology, the continuous emergence of related technologies and continuous enrichment into the process flow of EAF steelmaking, and the absorption of important functions of other steelmaking methods, the adaptability of EAF steelmaking to raw materials has continued. Enhanced, varieties, production continue to expan...

AI Technical Summary

Problems solved by technology

However, with the improvement of Baosteel's electric arc furnace cost reduction and energy saving requirements, the amount of slag steel and slag iron is further increasing, and there is a gap in the use effect of the above slag adjusting agents, especially in terms of furnace lining life and smelting yield.

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