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Composition for making submerged nozzle

A composition and immersion technology, which is applied in the field of composition for making immersion nozzles, can solve problems such as high cost and service life, and achieve the effects of improving strength, improving corrosion resistance, and reducing costs

Inactive Publication Date: 2009-05-27
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composition for making submerged nozzles by using two materials to make the slag line and the main part respectively to solve the problems of high cost and service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The manufacturing process of the thin slab aluminum-zirconium carbonaceous special-shaped submerged nozzle includes the following steps:

[0011] (1) Weigh 50 kg of feldspar, 200 kg of coarse corundum with a diameter of 0.2 mm, 400 kg of fine particle corundum of 300 mesh, 50 kg of silicon carbide, and 200 kg of graphite, mix for 5 minutes with a mixer, and then add phenolic Resin 100 kilograms, and stir 15 minutes, promptly obtain the mixed mud material 1 of making main body.

[0012] (2) Weigh 300 kg of coarse particle zirconia with a diameter of 0.2mm, 400 kg of fine particle zirconia with a diameter of 300 mesh, 50 kg of zirconium boride, and 150 kg of graphite, mix them with a mixer for 5 minutes, and then add phenolic Resin 100 kilograms, and stir 15 minutes, promptly obtain the mixed mud material 2 of making slag line.

[0013] (3) After sealing the mixed mud material 1 and the mixed mud material 2 for 24 hours respectively, discharge the residual volatile matte...

Embodiment 2

[0017] Weigh 30 kg of feldspar, 150 kg of coarse corundum with a diameter of 0.6 mm, 550 kg of fine corundum of 350 mesh, 30 kg of silicon carbide, and 190 kg of graphite, mix them with a mixer for 5 minutes, and then add 50 kg of phenolic resin , and stirred for 15 minutes to obtain the mixed mud 1 for making the main body.

[0018] Weigh 250 kg of coarse-grained zirconia with a diameter of 0.2-0.5 mm, 350 kg of fine-grained zirconia with a diameter of 360 mesh, 70 kg of zirconium boride, and 180 kg of graphite, mix them with a mixer for 5 minutes, and then add phenolic resin 150 kilograms, and stirred for 15 minutes to obtain the mixed mud material 2 for making the slag line.

[0019] According to the method of embodiment 1, the mixed mud material 1 and the mixed mud material 2 are made into finished products.

Embodiment 3

[0021] Weigh 70 kg of feldspar, 150 kg of coarse corundum with a diameter of 0.4mm, 350 kg of fine corundum of 355 mesh, 70 kg of silicon carbide, and 210 kg of graphite, mix them with a mixer for 5 minutes, and then add 150 kg of phenolic resin , and stirred for 15 minutes to obtain the mixed mud 1 for making the main body.

[0022] Weigh 350 kg of coarse particle zirconia with a diameter of 0.5mm, 450 kg of fine particle zirconia with a diameter of 360 mesh, 30 kg of zirconium boride, and 120 kg of graphite, mix with a mixer for 5 minutes, and then add 50 kg of phenolic resin , and stirred for 15 minutes to obtain the mixed mud material 2 for making the slag line.

[0023] According to the method of embodiment 1, the mixed mud material 1 and the mixed mud material 2 are made into finished products.

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Abstract

The invention relates to a composition used to make submerged nozzles, which comprises a composition used to make a main body and a composition used to make a slag line part, wherein the composition used to make the main body consists of feldspar, corundum, silicon carbide, graphite and phenolic resin and the composition used to make the slag line part consists of zirconia, zirconium boride, graphite and phenolic resin. The combination mode between atoms of the composition used to make the main body can form a structure of carbon-carbon bond and porcelain composition, so as to improve the strength of the composition; zirconium diboride in the composition used to make the slag line part can improve corrosion resistance; and simultaneously, two materials adopted according to different parts can reduce cost in manufacturing.

Description

technical field [0001] The invention relates to a composition for making a submerged nozzle. Background technique [0002] The existing submerged nozzle is made of raw materials such as corundum, zirconia, graphite and phenolic resin, and is manufactured through processes such as mixing, cold isostatic pressing, lathe processing, and long-time buried carbon roasting. In the materials used to make the above-mentioned submerged nozzles, the bond between atoms is carbon-carbon bond, and this bond is relatively low in strength, and often breaks during use, and the breakage will directly lead to the leakage of pouring steel facilities The molten steel is burned, especially in the continuous casting process of molten steel, the billet shell is broken and the billet is scrapped; at the same time, the service life of the submerged nozzle made of the above materials is short, and the replacement or repair of the nozzle will cause discontinuous production, resulting in production The...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
Inventor 林东李秉强姜学锋包丽杰吴迪刘军薛文辉王峰
Owner BENGANG STEEL PLATES
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