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Continuous casting tundish and manufacturing method thereof

A continuous casting tundish and cladding technology, which is applied to casting equipment, manufacturing tools, casting melt containers, etc., can solve the problems of shortened service life of continuous casting tundish, aggravated erosion, erosion, etc., so as to reduce the production cost of continuous casting. , The installation and construction are convenient, and the effect of improving the installation quality

Inactive Publication Date: 2011-08-17
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main shortcomings of the traditional nozzle block technology are: the hole structure of the matched nozzle block and the outer wall structure of the upper nozzle are not reasonable, the nozzle block adopts the aluminum carbon machine press molding process and the nozzle block and the upper nozzle The mud joints for matching installation are 2-3mm, and the bottom and surrounding of the nozzle seat bricks are rammed with magnesia ramming materials, etc.
Therefore, for the tundish in the prior art, the main defects that exist in production practice are: (1) the pass structure of the nozzle block and the outer wall structure of the upper nozzle that cooperate with each other are not reasonable; The joint installation of the nozzle seat brick and the upper nozzle is large, resulting in steel seepage through the mud seam; (3) The steel connection of the upper nozzle is higher than the outlet brick, so that the steel connection of the upper nozzle is directly exposed to the molten steel, which is eroded by molten steel, Increased scouring, resulting in a significant reduction in the service life of the upper nozzle, etc.
That is, due to the above-mentioned many deficiencies in the prior art of tundish continuous casting, the service life of the continuous casting tundish is reduced, and the refractory consumption of the continuous casting tundish and the pouring margin of the tundish (abbreviated as the surplus) of the tundish are increased.
Especially when the continuous casting process is used to produce wide and thick slabs, the above phenomenon is more serious

Method used

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  • Continuous casting tundish and manufacturing method thereof
  • Continuous casting tundish and manufacturing method thereof
  • Continuous casting tundish and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] In this embodiment, the continuous casting tundish includes a cladding 1 , a permanent lining 2 , a working lining 3 , an aluminum carbide silicon carbide ramming material 4 , a sealing ring 5 , an upper nozzle 6 , and a nozzle block 7 . The cladding 1 , the permanent liner 2 and the working liner 3 are formed as a bucket-type or cup-type container without a lid, and the bottom of the container is provided with an opening for letting the molten metal flow out. The permanent lining 2 is formed between the casing 1 and the working lining 3 and is in close contact with the casing 1 and the working lining 3 . During the casting process, the working lining 3 is in direct contact with the molten steel.

[0043] The nozzle seat brick 7 is located in the bottom opening of the permanent lining 2 and the working lining 3, and the upper nozzle 6 is installed in the upper nozzle installation hole 9 of the nozzle seat brick 7.

[0044] The refractory sealing ring 5 fits on the uppe...

Embodiment 2

[0057] The differences between this embodiment and Embodiment 1 are:

[0058] In the continuous casting tundish of this embodiment, the nozzle block 7 is in the shape of a truncated cone; the diameter D1 of the upper nozzle installation hole 9 is 2.4 mm larger than the outer diameter d1 of the steel connection port of the upper nozzle 6, that is, the upper part of the nozzle block 7 The width of the installation mud joint is 1.2mm; the diameter D2 of the upper nozzle installation hole 9 is 3.0mm larger than the outer diameter d2 of the middle part of the upper nozzle 6, that is, the width of the installation mud joint at the bottom of the nozzle block 7 is 1.5mm; the groove The distance k between the gripper 9 and the top of the outer wall of the nozzle block 7 is 40mm; the height of the groove gripper 8 is h40mm, the width b is 120mm, the depth s is 30mm, and the radian of the inclination p is 45 degrees; the nozzle block 7 contains 98% Al by weight 2 o 3 , the refractorine...

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Abstract

The invention provides a continuous casting tundish and a manufacturing method thereof. The continuous casting tundish comprises a cup-shaped tundish body and a molten metal outlet, wherein, the tundish body comprises a tundish shell, a permanent lining and a working lining from outside to inside; and the molten metal outlet comprises a nozzle pocket brick, an upper nozzle, a refractory seal ring and a refractory ramming material, wherein, the middle part of the nozzle pocket brick is equipped with an upper nozzle mounting hole with a big end down inner diameter, the upper nozzle is matched with the nozzle pocket brick so as to ensure that the upper surface of the upper nozzle is leveled with that of the nozzle pocket brick or the upper surface of the nozzle pocket brick is slightly higher than that of the upper nozzle when the upper nozzle is installed in the nozzle pocket brick, the refractory seal ring is filled between the upper nozzle and the tundish shell, and the refractory ramming material is arranged above the refractory seal ring and / or the tundish shell and is filled in clearance between the nozzle pocket brick and the tundish body. The continuous casting tundish and the manufacturing method thereof have the beneficial effects that problems such as steel penetration in the upper nozzle pocket brick and the like are solved, the service life of the upper nozzle is prolonged, and the continuous casting heats per tundish of the continuous casting tundish are increased from 8-14 to 20-26, thus improving the qualification rate of a continuous casting billet, and lowering the continuous casting production cost.

Description

technical field [0001] The present invention relates to the technical field of continuous casting, and more specifically relates to a continuous casting tundish and a manufacturing method thereof. The number of continuous pouring furnaces. Background technique [0002] At present, there are generally 8 to 14 furnaces for single-bale continuous casting of tundishes for wide-thick slab continuous casting machines at home and abroad, and the maximum is 18 furnaces. Among them, the steel penetration between the nozzle block and the upper nozzle is one of the key technical problems restricting the life of the tundish of the continuous casting machine at home and abroad. The main shortcomings of the traditional nozzle block technology are: the hole structure of the matched nozzle block and the outer wall structure of the upper nozzle are not reasonable, the nozzle block adopts aluminum carbon machine press molding technology and the nozzle block and the upper nozzle The mud join...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/00B22D41/52
Inventor 武光君武文健
Owner LAIWU IRON & STEEL GRP
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