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Beam blank continuous casting machine tundish working lining, construction tire film of working lining and preparation method of working lining

A special-shaped billet continuous casting and working lining technology, which is used in casting equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of reducing the qualified rate of special-shaped billets, increasing the tundish casting surplus, erosion, etc., and improving single-ladle continuous casting. Time, good economic and social benefits, the effect of reducing the cost of refractory materials

Active Publication Date: 2012-10-03
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem in the tundish is that the magnesium plate produced by the existing technology is used as the working lining and protection plate in the impact area of ​​the tundish. The bottleneck problem of service life, and the low service life of the tundish leads to the high cost of refractory materials in the continuous casting tundish of profiled billet, and increases the surplus of tundish, thereby reducing the qualified rate of profiled billet

Method used

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  • Beam blank continuous casting machine tundish working lining, construction tire film of working lining and preparation method of working lining
  • Beam blank continuous casting machine tundish working lining, construction tire film of working lining and preparation method of working lining
  • Beam blank continuous casting machine tundish working lining, construction tire film of working lining and preparation method of working lining

Examples

Experimental program
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Effect test

Embodiment 1

[0034] figure 1 , figure 2 As shown, a tundish working lining of a profiled billet continuous casting machine is characterized in that the working lining in the impact zone is built with carbon-containing refractory bricks 2, and a layer of smear 3 is applied on the outer surface of the carbon-containing refractory bricks (2), And the corners 5 of the working lining in the impact zone are all arc angles, and the wall working lining 8 and the bottom working lining 10 outside the impact zone are all made of dry materials. The corner 5 of the working lining in the impact zone is changed from a traditionally designed right angle to a circular arc angle, which reduces the resistance when the molten steel in the tundish flows through the corner of the working lining, thereby reducing the erosion of the corner by the molten steel and making the corner partially The technical problem of heavy erosion is solved.

[0035] The thickness a of the working lining carbon-containing refrac...

Embodiment 2

[0053] Others are the same as embodiment 1, the difference is:

[0054] The thickness a of the working lining 2 in the impact zone is 50 mm, and the thickness b of the smear material 3 is 30 mm.

[0055] The thickness x of the wall lining 8 outside the impact zone is 60 mm, and the thickness y of the bottom lining 10 is 50 mm.

[0056] The carbon-containing refractory brick is an aluminum-magnesia-carbon brick whose brand name is LMT-72, and its MgO+Al 2 o 3 The content is 72%, the MgO content is 10%, the C content is 7%, the apparent porosity is 10%, and the bulk density is 2.80g / cm 3 , The compressive strength at room temperature is 40MPa, and the softening temperature under 0.2MPa load is 1600℃.

[0057] The smear 3 refers to the magnesium smear produced in the prior art and used for the working lining of the tundish of the continuous casting machine.

[0058] The baffle 11 is made of heat-resistant cast steel, and the thickness of the baffle 11 is 30mm.

[0059] A met...

Embodiment 3

[0069] Others are the same as embodiment 1, the difference is:

[0070] The thickness a of the working lining 2 in the impact zone is 60 mm, and the thickness b of the smear material 3 is 20 mm.

[0071] The thickness x of the wall lining 8 outside the impact zone is 70 mm, and the thickness y of the bottom lining 10 is 60 mm.

[0072] The carbon-containing refractory bricks are MT-18C magnesia-carbon bricks with a MgO content of 69%, a C content of 18%, an apparent porosity of 4.0%, and a bulk density of 2.87g / cm 3 , The room temperature compressive strength is 30MPa.

[0073] The baffle 11 is made of heat-resistant cast steel, and the thickness of the baffle 11 is 25 mm.

[0074] A method for preparing a tundish working lining of a profiled billet continuous casting machine, comprising the following steps:

[0075] 1) Preparation of tire mold 12 for construction of dry lining material: before construction, clean the surface of tire mold 12 for construction of dry lining m...

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Abstract

The invention belongs to the technical field of steel metallurgy continuous casting tundish technique, in particular to a beam blank continuous casting machine tundish working lining, a construction tire film of the working lining and a preparation method of the working lining. The working lining, the construction tire film and the preparation method are characterized in that a working lining in an impact area is forming by carbonic fireproofing tiles (2), a layer of painting materials (3) are painted on the outer surfaces of the carbonic fireproofing tiles (2), corners (5) of the working lining in the impact area are all arc corners, wall wrapping working linings (8) and bottom wrapping working linings (10) except for a tundish impact area all adopt dry-type materials. Therefore, service life of the working lining of the tundish impact area and working linings at other portions are synchronous, monopack continuous casting time achieves more than 36 hours which shortens 12 hours than the time at the same condition, and continuous casting tundish material cost reduces more than 30% than the cost at the same condition.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical continuous casting tundish technology, and relates to a tundish working lining of a special-shaped billet continuous casting machine, its construction film, and a preparation method thereof, and in particular to a work in the impact zone of a special-shaped billet continuous casting machine tundish Lining, its construction membrane, and its preparation method. Background technique [0002] Due to the particularity of the section, the special-shaped billet continuous casting machine is a new continuous casting process integrating round billet, square billet and slab. The tundish has different process characteristics from other traditional continuous casting and continuous casting tundishes. The design is long and narrow, and each strand is poured with 2 sizing nozzles, and the distance between the 2 sizing nozzles of each strand is different for different slab sections. The ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/02C04B35/66
Inventor 武光君张继军
Owner LAIWU IRON & STEEL GRP
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