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Low-cost composite dry material working lining of two-flow slab continuous casting tundish and construction method

A slab continuous casting and dry material technology, applied in the direction of manufacturing tools, casting equipment, metal processing equipment, etc., can solve problems such as unfavorable casting quality and yield, carbonization and oxygenation of molten steel, cracks in joint parts, etc. The effect of considerable economic benefits, cost reduction and service life improvement

Active Publication Date: 2021-12-28
鞍山钢铁冶金炉材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this invention: all the magnesia materials used in different grades of dry vibrating materials in this invention, the magnesia refractories have deviations in anti-slag erosion performance, and it is difficult to achieve a large increase in service life;
The disadvantages of this invention: Since there are three materials with completely different construction performances in this invention: waste magnesium carbon machine pressed bricks, regenerated dry materials, and regenerated smear materials, not only the construction is complicated and cumbersome, but also it is easy to cause cracks in the connecting parts. In addition, due to the use of carbon-containing waste bricks and recycled materials, it is easy to cause carbonation and oxygenation of molten steel, which is not conducive to the improvement of billet quality and yield, and is a fatal flaw for tundish continuous casting

Method used

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  • Low-cost composite dry material working lining of two-flow slab continuous casting tundish and construction method
  • Low-cost composite dry material working lining of two-flow slab continuous casting tundish and construction method
  • Low-cost composite dry material working lining of two-flow slab continuous casting tundish and construction method

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Experimental program
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Effect test

Embodiment 1

[0056] Such as figure 1 , figure 2 , image 3 As shown, a low-cost composite dry material working lining of a two-strand slab continuous casting tundish, the working lining 1 in the impact zone is made of magnesium chromium dry material, and its construction thickness is 75mm; the working lining 2 in the casting area is made of magnesium Dry material, its construction thickness is 75mm, the bottom working lining 3 adopts magnesium silicon dry material, its construction thickness is 85mm; the width X of the movable partition 4 is 75mm, the thickness Z is 25mm, and the height Y is higher than the package Along 15mm; standard thickness wedge 5 scale part thickness a is 75mm, height b range is 100mm; pressure plate part length c is 250mm, thickness d is 25mm.

[0057] The magnesia-chrome dry-type material used in the impact zone 1 of the low-cost composite dry-type material working lining of the two-strand slab continuous casting tundish consists of the following raw materials ...

Embodiment 2

[0079] This embodiment is the same as Embodiment 1 except for the following content.

[0080] The construction thickness of the working lining 1 in the impact area and the working lining 2 in the pouring steel area are both 70mm, and the construction thickness of the bottom working lining 3 is 80mm; the width X of the movable partition 4 is 70mm; the thickness a of the scale part of the marked thickness wedge 5 is 70mm.

[0081] The magnesia-chrome dry-type material used in the impact zone 1 of the low-cost composite dry-type material working lining of the two-strand slab continuous casting tundish consists of the following raw materials in parts by weight: 50 parts of fused magnesia with a particle size of ≤2mm , 30 parts of regenerated magnesia-chrome waste finished product with a particle size of ≤2 mm, 11 parts of 240-mesh fused magnesia powder, 8 parts of binder, and 1.2 parts of volume change regulator.

[0082]The magnesia dry-type material used for the low-cost composi...

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Abstract

The invention provides a low-cost composite dry material working lining of two-flow slab continuous casting tundish and a construction method. The working lining comprises an impact area working lining dry material, a steel casting area working lining dry material and a tundish bottom working lining dry material; and the impact area working lining dry material is a magnesium-chromium dry material, the steel casting area working lining dry material is a magnesium dry material, and the tundish bottom working lining dry material is a magnesium-silicon dry material. According to different using conditions and different corrosion mechanisms of an impact area, a steel casting area and a tundish bottom of the tundish, dry materials which are good in compatibility and made of different materials and have different grades are adopted, the service life of the tundish is prolonged to 22 hours or above, and the comprehensive input cost of tundish working lining refractory materials is reduced by 30% or above.

Description

technical field [0001] The invention relates to the technical field of tundish monolithic refractory materials, in particular to a low-cost composite dry material working lining and construction method for a two-strand slab continuous casting tundish. Background technique [0002] Tundish metallurgy is a special refining technology outside the furnace. It is a key link in the production process from steel smelting and refining to solid continuous casting slabs to ensure excellent steel quality. It has become an essential part of efficient continuous casting technology. In recent years, with the rapid development of high-efficiency continuous casting steelmaking technology and the use of rapid nozzle replacement technology, the requirements for the long-life use of the tundish working lining are getting higher and higher. [0003] In order to meet the needs of long life of the tundish, it is essential to improve the grade of raw materials for the working lining of the tundis...

Claims

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Application Information

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IPC IPC(8): B22D41/02C04B35/043C04B35/622
CPCB22D41/02B22D41/023C04B35/0435C04B35/043C04B35/62204C04B2235/3272C04B2235/96C04B2235/9607Y02P10/20
Inventor 刘艳孙逊
Owner 鞍山钢铁冶金炉材科技有限公司