CN212885021U

CN212885021U - Novel continuous casting long nozzle capable of prolonging service life of tundish refractory

Info

Publication number: CN212885021U
Application number: CN202021603814.1U
Authority: CN
Inventors: 杨明磊
Original assignee: MCC Southern Continuous Casting Technology Engineering Co Ltd
Current assignee: MCC Southern Continuous Casting Technology Engineering Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-04-06
Anticipated expiration: 2030-08-05

Abstract

The utility model discloses a novel continuous casting long nozzle capable of prolonging the service life of tundish refractory, which comprises a first straight pipe section, a first bend section, a second straight pipe section and a second bend section which are sequentially communicated, wherein the upper port of the first straight pipe section is fixedly connected with a manipulator of a molten steel ladle, and the first straight pipe section is communicated with the interior of the molten steel ladle; the outer wall of the first bend section is fixedly connected with the top of the intermediate tank; the second bend section extends into the middle tank, the lower port of the second bend section is vertically downward and is opposite to an impact basin arranged in the middle tank, and the horizontal distance L from the central line of the water outlet of the second bend section to the intersection line of the refractory lining and the inner bottom surface of the middle tank is at least 300mm. The utility model has the advantages that: the utility model discloses a plurality of bend sections and straight tube section link to each other and constitute the long mouth of a river, with two long mouth of a river molten steel impact zones of two pans of butterfly to the direction translation of keeping away from the interior lateral wall of pan, fundamentally has avoided the molten steel to strike the resistant material of tundish inner wall and has caused the problem of wearing the package, has prolonged the life of resistant material.

Description

Novel continuous casting long nozzle capable of prolonging service life of tundish refractory

Technical Field

The utility model relates to a ferrous metallurgy technical field, concretely relates to can prolong novel continuous casting long mouth of a river of pans resistant material life-span.

Background

With the increasing demand of steel mills on the capacity of continuous casting machines, the flow number of the continuous casting machines is increased. When the flow number exceeds 8, the design of butterfly-shaped double-tundish is often adopted, tundish penetration accidents are easy to happen in the production process, and important equipment is damaged and huge economic loss is caused.

A straight pipe type long nozzle is adopted in the traditional design, and the structure is shown in figure 1. The main reason for causing the tundish penetration phenomenon is that the distance between two protective sleeves of a ladle is fixed, so that the impact drop point of a water gap of the ladle is too close to the side wall of the tundish, and molten steel passing through the protective sleeves of the ladle erodes refractory materials on the side wall of the tundish; the refractory on the side wall of the tundish can be damaged by the scouring of the molten steel for a long time under the influence of the scouring of the molten steel, so that the molten steel erodes the cladding of the tundish, and finally the molten steel penetrates out from the side wall of the tundish.

The method adopted at present is as follows: the coating layer in the impact area is thickened when the tundish is built, so that the side wall of the refractory material of the tundish is closer to the outlet of the long nozzle, and the refractory material of the side wall of the tundish cannot be excessively scoured fundamentally. Therefore, there is a need for improvements in the prior art.

Disclosure of Invention

An object of the utility model is to provide a novel continuous casting long mouth of a river of extension pans life to prior art not enough, solve among the prior art tundish lateral wall refractory material and excessively erode the package problem of wearing that causes.

The utility model adopts the technical proposal that: a novel continuous casting long nozzle capable of prolonging the service life of tundish refractory materials is characterized by comprising a first straight pipe section, a first bend pipe section, a second straight pipe section and a second bend pipe section which are sequentially communicated, wherein the upper port of the first straight pipe section is fixedly connected with a manipulator of a molten steel ladle, and the first straight pipe section is communicated with the interior of the molten steel ladle; the outer wall of the first bend section is fixedly connected with the top of the intermediate tank; the second bend section extends into the middle tank, the lower port of the second bend section is vertically downward and is opposite to an impact basin arranged in the middle tank, and the horizontal distance L from the central line of the water outlet of the second bend section to the intersection line of the refractory lining and the inner bottom surface of the middle tank is at least 300mm.

According to the scheme, the second straight pipe section is obliquely arranged in the direction away from the refractory lining in the intermediate tank.

According to the scheme, the included angle alpha between the axis of the second straight pipe section and the axis of the first straight pipe section is at least 20 degrees.

According to the scheme, the bending directions of the first bending pipe section and the second bending pipe section are opposite, and the first bending pipe section and the second bending pipe section are arranged in a 180-degree rotating mode.

According to the scheme, the upper end of the first straight pipe section is connected with the arc bayonet of the manipulator.

According to the scheme, the outer side of the arc-shaped bayonet is provided with the limiting clamping block, and the inner side of the limiting clamping block is matched with the outer peripheral surface of the first straight pipe section.

According to the scheme, the first straight pipe section, the first bent pipe section, the second straight pipe section and the second bent pipe section are connected in sequence in a smooth transition mode.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts the connection of a plurality of bend pipe sections and straight pipe sections to translate the molten steel impact areas of two long nozzles of the butterfly-shaped double tundish to the direction far away from the inner side wall of the tundish, thereby fundamentally avoiding the problem of penetration caused by the impact of the molten steel on the refractory material of the inner wall of the tundish and prolonging the service life of the refractory material; the utility model discloses simple structure, reasonable in design, the practicality is strong.

Drawings

Fig. 1 is a schematic structural view of a conventional straight-tube long nozzle.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Fig. 3 is a schematic view of the assembly of the present embodiment with a robot.

Fig. 4 is an installation diagram of the present embodiment.

Wherein: 1-ladle of molten steel; 2-long water gap; 2.1-a first straight section; 2.2, a first bent pipe section; 2.3-a second straight tube section; 2.4-second bend section; 3-a tundish; 4-a refractory lining; 5-impacting the basin; 6-a manipulator; 6.1-arc bayonet; 7-limiting clamping blocks; 8. straight tube type long nozzle.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

As shown in fig. 2 and 4, the novel continuous casting long nozzle capable of prolonging the service life of the refractory material of the tundish is characterized in that the long nozzle 2 comprises a first straight pipe section 2.1, a first bend pipe section 2.2, a second straight pipe section 2.3 and a second bend pipe section 2.4 which are sequentially communicated, an upper port of the first straight pipe section 2.1 is fixedly connected with a manipulator 6 of the molten steel ladle 1, and the first straight pipe section 2.1 is communicated with the interior of the molten steel ladle 1; the outer wall of the first bend section 2.2 is fixedly connected with the top of the intermediate tank 3; the second bend section 2.4 stretches into the inner part of the intermediate tank 3, the lower port of the second bend section 2.4 is vertically downward opposite to the impact basin 5 arranged in the intermediate tank 3, and the horizontal distance L from the central line of the water outlet of the second bend section 2.4 to the intersection line of the refractory lining 4 and the inner bottom surface of the intermediate tank 3 is at least 300mm.

Preferably, the second straight pipe section 2.3 is arranged obliquely away from the refractory lining 4 in the intermediate tank 3, and the included angle α between the axis of the second straight pipe section 2.3 and the axis of the first straight pipe section 2.1 is at least 20 °.

Preferably, the bending directions of the first bend section 2.2 and the second bend section 2.4 are opposite, and the first bend section and the second bend section are arranged in a 180-degree rotation opposite direction.

Preferably, as shown in fig. 3, the upper end of the first straight pipe section 2.1 is connected with an arc bayonet 6.1 of the manipulator 6, a limiting fixture block 7 for limiting the rotation of the long nozzle 2 is arranged outside the arc bayonet 6.1, and the inner side of the limiting fixture block 7 is matched with the outer peripheral surface of the first straight pipe section 2.1. The limiting fixture block 7 can ensure that the upper end of the first straight pipe section 2.1 is assembled with the manipulator 6 at a specific angle, so that the first straight pipe section 2.1 is accurately positioned during installation and does not deflect during working.

In this embodiment, the first straight pipe section 2.1, the first bend pipe section 2.2, the second straight pipe section 2.3 and the second bend pipe section 2.4 are connected in sequence in a smooth transition manner, wherein the inner cavities of the first straight pipe section 2.1 and the second straight pipe section 2.3 are cylindrical.

In the prior art, the distance between the long nozzle and the bottom in the intermediate tank 3 is fixed, when molten steel enters the impact basin 5 of the intermediate tank 3 from the molten steel ladle 1 along the straight pipe type long nozzle 8, water from the central line of the water outlet of the straight pipe type long nozzle 8 to the intersection line of the refractory lining 4 and the bottom in the intermediate tank 3Flat distance L₁Generally 180mm, the maximum is not more than 200mm, and when the flow speed of the molten steel is larger, the molten steel impacts the refractory lining 4, so that the refractory lining 4 is damaged and even is wrapped. The utility model discloses a plurality of bend sections and straight tube section link to each other to according to experience with 2 molten steel impact zone in the long mouth of a river to keeping away from the at least 100mm of direction translation of resistant material lining 4 (second bend section 2.4 delivery port central line is 300mm to the horizontal distance L of resistant material lining 4 and 3 interior bottom surface intersecting lines of pans after the translation at least, and the position of strikeing basin 5 corresponds the adjustment, and the molten steel flows through with the multiple velocity of flow in the production process the long mouth of a river is 2 the time, all can not assault 3 inner wall resistant material linings 4 of pans, has prolonged the life of resistant material lining 4.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A novel continuous casting long nozzle capable of prolonging the service life of tundish refractory materials is characterized by comprising a first straight pipe section, a first bend pipe section, a second straight pipe section and a second bend pipe section which are sequentially communicated, wherein the upper port of the first straight pipe section is fixedly connected with a manipulator of a molten steel ladle, and the first straight pipe section is communicated with the interior of the molten steel ladle; the outer wall of the first bend section is fixedly connected with the top of the intermediate tank; the second bend section extends into the middle tank, the lower port of the second bend section is vertically downward and is opposite to an impact basin arranged in the middle tank, and the horizontal distance L from the central line of the water outlet of the second bend section to the intersection line of the refractory lining and the inner bottom surface of the middle tank is at least 300mm.

2. The novel continuous casting long nozzle as claimed in claim 1, wherein the second straight pipe section is arranged obliquely away from the refractory lining layer in the tundish.

3. A novel continuous casting long nozzle as claimed in claim 2, wherein the angle α between the axis of the second straight tube section and the axis of the first straight tube section is at least 20 °.

4. The new continuous casting long nozzle as claimed in claim 1, wherein the first and second curved sections are bent in opposite directions, and are arranged in opposite directions rotated by 180 °.

5. The new continuous casting long nozzle as claimed in claim 1, wherein the upper end of the first straight pipe section is connected with the arc bayonet of the manipulator.

6. The novel continuous casting long nozzle as claimed in claim 4, wherein a limiting block is arranged on the outer side of the arc bayonet, and the inner side of the limiting block is matched with the outer peripheral surface of the first straight pipe section.

7. The novel continuous casting long nozzle as claimed in claim 1, wherein the first straight pipe section, the first bend pipe section, the second straight pipe section and the second bend pipe section are connected in sequence in a smooth transition manner.