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Lining material of tundish for conticasting

A technology of working lining and quality technology, applied in the field of refractory materials, can solve the problems of permanent lining adhesion of water-based paint tundish, increase tundish baking time, prolong production cycle and other problems, achieve high-load soft point, improve strength and slag resistance Erosion performance, effect of improving slag resistance

Inactive Publication Date: 2002-12-04
朱德智
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  • Summary
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] 2. Since water is added to the coating, the baking time of the tundish is increased. Usually, the coating needs to be baked at a high temperature for 4-8 hours before it can be used safely, which prolongs the production cycle and increases the cost
[0006] 3. Water-based paint is prone to sticking to the permanent lining of the tundish, making it difficult to turn over the tundish and affect the operation
However, more borides, phosphates and fluorides are added to the chemical composition of the working lining. These components are easy to form low-melting point phases with the main component magnesium oxide at high temperatures, which affects the service life.

Method used

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Embodiment Construction

[0026] According to the raw material composition of the continuous casting tundish working lining of the present invention, three batches of working lining are prepared. The raw material composition of the three batches of continuous casting tundish working lining is shown in Table 1. The test results of the quality and technical indicators of magnesium, sand, bauxite and soft clay used in the three batches of lining materials are as follows:

[0027] Magnesia: MgO 95.1%, SiO 2 2.01%, CaO 1.28%, baking loss 0.17%, particle volume density 3.19g / cm 3 .

[0028] Bauxite: Al 2 o 3 83.7%, CaO+MgO 0.82%, Fe 2 o 3 1.09%, particle bulk density 2.91g / cm 3 , water absorption 3.2%.

[0029] Soft clay: Al 2 o 3 32.92%, SiO2 49.95%, Fe 2 o 3 2.82%, loss on ignition 12.24%, refractoriness 1710°C.

[0030] The physical and chemical properties of the three batches of prepared working linings were tested, and the test results are shown in Table 2.

[0031] The No. 1 continuous ...

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PUM

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Abstract

A lining material of tundish for conticasting contains magnesium sand (80-95 wt.%), alumina (1-10 wt.%), soft clay (1-5 wt.%) and thermoplastic organic compound (2-15 wt.%). Its advantages are high strnegth, anticorrosion power, and high conticasting productivity.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to unshaped refractory materials. It is suitable for lining material of high temperature smelting vessel, especially suitable for working lining of continuous casting tundish. Background technique [0002] The continuous casting tundish is the last container where molten steel stays in the steelmaking process. The quality of the working lining of the tundish has a certain influence on the continuous casting casting time and the quality of the billet. [0003] In the prior art, there are two main types of working linings used in continuous casting tundishes: one is thermal insulation boards, and the other is paint (or spray paint). Insulation panels are complicated to produce, high in cost, difficult in transportation, and easily cause molten steel pollution during use, so they are gradually replaced by tundish coatings. However, when the tundish coating is used on site, a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/10B22D41/02C04B35/04C04B35/66
Inventor 朱德智
Owner 朱德智
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