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

A DC electric arc furnace and furnace protection agent technology, applied in the field of deoxidation furnace protection agent, can solve the problems of furnace lining life and smelting yield that cannot meet the requirements, so as to improve the yield of all iron, good slag hanging on the furnace wall, and increase viscosity and the effect of alkalinity

Inactive Publication Date: 2008-11-12
上海柯瑞冶金炉料有限公司
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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

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

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[0021] The substantive features and remarkable progress of the present invention will be further described below through the elaboration of specific examples, but the present invention is by no means limited to the examples.

[0022] The composition of the ultra-high power direct current electric arc furnace protection agent provided by the present invention is as shown in table 2

[0023] Table 2 The proportion of the improved electric furnace protection agent provided by the present invention is (wt%)

[0024] MgO

[0025] Among them, the weight ratio of metal aluminum, silicon carbide, metal iron and graphite is 1:4~6:1~2:4~6, and the density of the prepared slag adjusting agent is 1.80~1.95g / cm 3 . The furnace protection agent compressed into a football shape is 1000kg per furnace and added in three batches. After the lime is added in the first batch, the addition amount is 400kg, the second batch is also added after the lime is added, the addition amount is ...

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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...

Claims

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Application Information

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IPC IPC(8): C21C5/52C21C5/54
CPCY02P10/20Y02P40/40
Inventor 刑建辉李华坚潘石张海雷
Owner 上海柯瑞冶金炉料有限公司
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