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Continuous casting tundish stopper

A technology of stopper rod and continuous casting, which is used in foundry equipment, casting melt containers, manufacturing tools, etc., can solve the problems of slag corrosion and fracture of stopper rods and slag lines, and breakage of stopper rods. Cost consumption, the effect of avoiding the accident of broken rod and pouring

Inactive Publication Date: 2009-07-22
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to provide a long-life tundish stopper, which mainly solves the problem of slag corrosion and fracture at the slag line of the stopper
[0005] The idea of ​​the present invention is to improve the corrosion resistance of the tundish slag at the slag line of the stopper by changing the composition of the refractory material at the slag line of the stopper, thus solving the problem of the breakage of the stopper due to the rapid corrosion of the slag line of the stopper question

Method used

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Embodiment Construction

[0013] Referring to the accompanying drawings, the long-life continuous casting tundish stopper includes a stopper body 1 and a stopper slag line 2 .

[0014] 1. The composition and physical and chemical properties of refractory materials at the slag line are shown in the following table:

[0015] List of main components of refractories at the slag line

[0016] name symbol unit Example 1 Example 2 Example 3 silica SiO 2 ％ 9 13 10.18 Aluminum oxide al 2 o 3 ％ 0.6 0.8 0.65 iron oxide Fe 2 o 3 ％ 0.3 0.4 0.27 Calcium Oxide CaO ％ 3 2 1.33 magnesium oxide MgO ％ 0.1 0.25 0.15 Zirconia ZrO 2 ％ 63 61.55 61.90 graphite C ％ 24 22 25.52

[0017] Table of physical indicators of refractories at the slag line

[0018] name unit skills requirement typical value Tensile modulus: N / mm 2 8.6～9.3 9.1 Surface porosity: ％ 11.5～16.0 13.8 Bulk density: g / ...

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Abstract

The invention relates to a continuous casting tundish stopper rod, in particular to design of a slag line part composition of the tundish stopper rod, which mainly solves the problem of slag corrosion cracking of a slag line part of the stopper rod. The continuous casting tundish stopper rod adopts a technical proposal that the continuous casting tundish stopper rod with long service life comprises a stopper rod body and a stopper rod slag line. The continuous casting tundish stopper rod is characterized in that the slag line part adopts refractory materials which comprise the following compositions in percentage by weight: 8 to 15 percent of SiO2, 0.5 to 1 percent of Al2O3, 0.1 to 0.5 percent of Fe2O3, 1 to 3 percent of CaO, 0.1 to 0.3 percent of MgO, 60.8 to 64.0 percent of ZrO2 and 20 to 27 percent of graphite. The continuous casting tundish stopper rod is mainly used for improving the reliability and the service life of steel teeming equipment.

Description

Technical field: [0001] The invention relates to a continuous casting tundish plug rod, in particular to the component design of the slag line part of the tundish plug rod. Background technique: [0002] In recent years, with the acceleration of my country's economic construction and development, the annual output of steel has ranked first in the world for many years in a row. In 2005, my country's annual steel output reached 349 million tons, and the continuous casting slab output reached 143 million tons. At the same time, the transfer of the world's manufacturing industry to China has increased the burden on my country's energy, resources and environment. Adopting advanced production technology, improving quality and reducing production cost is not only conducive to improving the market competitiveness of my country's iron and steel enterprises, but more importantly, it is in line with the principle of long-term sustainable development. The abnormal final pouring situat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/18C04B35/14
Inventor 江中块邹俊苏郭振和管灿张勇
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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