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Nozzle slag line erosion resistant device and method for protecting pouring by using same

A technology for protection pouring and corrosion resistance, applied in the direction of casting melt containers, manufacturing tools, metal processing equipment, etc., can solve problems such as continuous casting nozzle slag line erosion, troublesome operation process, etc., to save replacement time, improve solidification quality, The effect of improving flow field stability

Active Publication Date: 2014-12-10
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the serious erosion problem in the slag line of the continuous casting nozzle in the prior art, the nozzle needs to be replaced regularly, and the operation process is troublesome

Method used

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  • Nozzle slag line erosion resistant device and method for protecting pouring by using same
  • Nozzle slag line erosion resistant device and method for protecting pouring by using same
  • Nozzle slag line erosion resistant device and method for protecting pouring by using same

Examples

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Effect test

Embodiment 1

[0046] See Figure 1-Figure 6, water port slag line erosion resistance device, which is composed of motor-driven vertical lifting frame 1, horizontal holder 2, argon gas pipeline 3, corrosion-resistant casing 5, etc. The frame body of vertical lifting frame 1 is a tubular structure, and the bottom end and The bracket is welded and stands upright on the ground. The upper end of the vertical lifting frame 1 is equipped with a gear lifting system, and the lifting of the vertical lifting frame 1 is adjusted by the gear lifting system. The horizontal clamper 2 is composed of a horizontal support rod and a movable ring. One end of the horizontal support rod is slidingly connected with the vertical lifting frame 1 through gears. The other end of the horizontal support rod is equipped with a fork-shaped movable handle 10. The arm ends are respectively equipped with movable shafts 11, and the two movable shafts 11 are respectively connected to the semi-circular rings 12; the other ends...

Embodiment 2

[0062] See Figure 5 , the corrosion-resistant casing 5 suitable for the submerged nozzle 17 of billet continuous casting was made, the upper and lower parts are cylindrical, the inner diameter of the cylinder is 90mm, the wall thickness is 12mm, the length is 200mm, and the material is ZrO 2 -C quality, ZrO 2 The content is 70-80%, the C content is 12-17%, and the rest is a small amount of phenolic resin, silicon carbide, boron carbide, etc. The technical indicators are apparent porosity of 15%, and bulk density of 3.55g / cm 3 , Compressive strength 25MPa, flexural strength 8MPa.

[0063] Before the tundish 16 is poured, open the bolt lock 4 of the horizontal holder 2, hang the two semicircular casings on the two semicircular rings of the horizontal holder 2; place the vertical lifting frame 1 in the submerged Next to the nozzle 17, adjust the length of the horizontal holder 2, and after aligning the submerged nozzle 17, put the two semicircular casings together, tighten the...

Embodiment 3

[0065] To make a corrosion-resistant casing suitable for the submerged nozzle of a rectangular billet, the upper part is cylindrical, the lower part is oblate, the inner diameter of the upper part of the cylinder is 72mm, the wall thickness is 12mm, the length is 130mm, the inner diameter of the lower arc is 85mm, the flat width is 60mm, and the wall thickness 12mm, length 170mm, made of ZrO 2 -C quality, ZrO 2 The content is 70-80%, the C content is 12-17%, and the rest is a small amount of phenolic resin, silicon carbide, boron carbide, etc. The technical indicators are apparent porosity of 17%, and bulk density of 3.62g / cm 3 , Compressive strength 24MPa, flexural strength 7MPa.

[0066] Before the tundish 16 is poured, open the bolt lock 4 of the horizontal holder 2, hang the two semicircular casings on the two semicircular rings of the horizontal holder 2; place the vertical lifting frame 1 in the submerged Next to the nozzle 17, adjust the length of the horizontal holde...

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Abstract

The invention provides a nozzle slag line erosion resistant device and a method for protecting pouring by using the same and belongs to the field of manufacturing and application of continuous casting nozzles. A vertical lifting frame of the device is connected with a horizontal clamper; the height of the horizontal clamper is adjusted through the vertical lifting frame; the horizontal clamper comprises a horizontal supporting rod and a movable ring; one end of the horizontal clamper is connected with the lifting frame; the other end of the horizontal clamper is connected with the movable ring; the movable ring is sleeved and encircled outside an erosion resistant protective cylinder and tightened by a bolt; the erosion resistant protective cylinder comprises two closed symmetric half cylinders; half-ring ventilating inner annular passages are formed in the upper part in the half cylinders; gas outlets for blowing argon are formed in the ventilating inner annular passages; and angular bosses are arranged outside the half cylinders. The method for protecting the pouring by using the nozzle slag line erosion resistant device comprises the steps of suspending, centering, cohesion, argon sealing, positioning and transposition. The nozzle slag line erosion resistant device provided by the invention has the advantages as follows: the operation process is simple and practical, the problem of serious nozzle slag line erosion is solved, the economic cost of continuous casting refractory material is reduced and the quality of a casting blank is improved. The nozzle slag line erosion resistant device provided by the invention is especially suitable for upgrading and remodeling continuous casting nozzle protective and erosion resistant technical measures in steel and iron plants.

Description

technical field [0001] The invention belongs to the field of manufacture and application of continuous casting nozzles, in particular to a [0002] A nozzle slag line corrosion-resistant device and a pouring protection method thereof are suitable for corrosion protection of continuous casting nozzles in iron and steel plants. Background technique [0003] The core of efficient continuous casting is to produce high-quality defect-free slabs at high continuous casting rates and high casting speeds, but high continuous casting rates and high casting speeds require high-quality nozzles to ensure smooth casting. At present, the slag lines of the nozzles (long nozzles or submerged nozzles) of each plant are severely corroded and need to be replaced in time. During the continuous casting process, the slag line of the nozzle is in direct contact with the mold slag layer. Under high temperature conditions, the mold slag reacts chemically with the refractory material of the nozzle. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/10B22D41/50B22D41/56B22D41/58
Inventor 赵定国王书桓崔小杰郭建龙李秋京
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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