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Low-carbon inner hole body-contained submersed nozzle

An immersion-type, inner-hole technology, applied in the direction of casting molten material containers, metal processing equipment, casting equipment, etc., can solve the problems that do not involve corrosion resistance and thermal shock resistance, and achieve good corrosion resistance of calcium-treated steel, Effects of reducing nozzle breakage accidents and ensuring thermal shock resistance

Active Publication Date: 2016-10-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] None of the existing documents and patents involve the submerged nozzle with a low-carbon inner hole body, taking into account the content of erosion resistance and thermal shock resistance

Method used

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  • Low-carbon inner hole body-contained submersed nozzle
  • Low-carbon inner hole body-contained submersed nozzle
  • Low-carbon inner hole body-contained submersed nozzle

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] see figure 1 , The manufacturing process of the submerged nozzle with low-carbon inner hole body of the present invention is the same as that of the existing submerged nozzle with inner hole body. A submerged nozzle containing a low-carbon inner hole body, comprising an inner hole body 1 , a body 2 and a slag line section 3 .

[0030] See Table 2 and Table 3 for the composition control of the nozzle inner hole material of the present invention and the comparison with existing materials.

[0031] The body material of the present invention is Al 2 o 3 -C, C content is greater than or equal to 20%; the material of the slag line section is ZrO 2 -C, ZrO 2 The content is greater than or equal to 73%. The specific ratio of nozzle body and slag line is shown in Table 1.

[0032] Table 1 Proportion of nozzle body and slag line (wt%)

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Abstract

The invention relates to a low-carbon inner hole body-contained submersed nozzle for calcium treatment steel continuous casting. The low-carbon inner hole body-contained submersed nozzle comprises an inner hole body, a main body and a slag line section; the inner hole body adopts a material of Al2O3-C, or Al2O3-spinel-C, or Spinel-C, or MgO-C; C is 6-12%; and SiO2 is less than 5%. The main body adopts a material of Al2O3-C; C is not less than 20%; the slag line section adopts a material of ZrO2-C; and ZrO2 is not less than 73%. The submersed nozzle is excellent in erosion resistance and thermal shock resistance, and can satisfy the requirements of calcium treatment steel continuous casting.

Description

technical field [0001] The invention relates to a submerged nozzle, in particular to a submerged nozzle containing a low-carbon inner hole body used for continuous casting of calcium-treated steel. Background technique [0002] The submerged nozzle is the key functional refractory material for continuous casting, and it is also the last functional refractory material that the molten steel passes through before it solidifies. Therefore, the quality of the submerged nozzle directly affects the quality of the molten steel and the slab. For a long time, scientific and technical personnel have conducted a lot of research on the material, performance and structure of the submerged nozzle. The performance and structure of the submerged nozzle have been greatly improved, which can better meet the needs of steelmaking and continuous casting. [0003] The existing submerged nozzle generally adopts Al 2 o 3 -C material, the carbon content is about 20% or more, and the slag line is ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/50B22D41/54
Inventor 姚金甫金从进甘菲芳王涛徐国栋
Owner BAOSHAN IRON & STEEL CO LTD