CN103170480A - Rapid cleaning device for bale long nozzle and cleaning method thereof - Google Patents

Abstract

The invention discloses a quick cleaning device and a cleaning method for a long nozzle of a large bag. The cleaning device includes a cleaning conduit. One end of the cleaning conduit is connected to an external oxygen tube through a quick locking knob, and the other end is provided with a The cleaning head for cleaning the water outlet. The spray surface of the cleaning head is an arc-shaped elevation structure, and there are several spray holes on the arc-shaped elevation. The axis of the spray holes on the spray surface is relative to the spray surface. There is a certain angle on the surface to ensure that the airflow sprayed from the spray hole is rotated. A cover plate is provided between the cleaning head and the cleaning duct to prevent the airflow and residual steel from splashing upward during the cleaning process. This kind of fast cleaning device for ladle long nozzle greatly improves the cleaning quality of the long nozzle, and at the same time reduces the cleaning time, creates conditions for continuous casting, and avoids the loss of downtime caused by improper cleaning or time urgency. The steel flow is stabilized, the product quality objections caused by it are reduced, and the product quality is improved.

Description

A quick cleaning device and cleaning method for long nozzles of large bales

technical field

The invention relates to the field of metallurgical continuous casting, in particular to a quick cleaning device and cleaning method for ladle long nozzles in the field of continuous casting.

Background technique

In the field of steelmaking, due to reasons such as splashing, ladle long nozzles for continuous casting need to be cleaned frequently during use to clean the residual steel inside to ensure smooth and stable steel flow. There are usually two ways of cleaning in the prior art, one is to interrupt the production and fully clean the long nozzle of the ladle, but this cleaning method will bring a lot of waste to the production and seriously reduce the production efficiency due to the interruption of the production , can not guarantee the continuous casting of multiple furnaces, does not give full play to the advantages of continuous casting, affects the output and affects the quality; the second cleaning method is to avoid the interruption of production, usually using 1-2 minutes of changing the bag The time of the nozzle is quite tight, so the cleaning process and cleaning time are required to be as fast as possible; the common method of washing the nozzle is to use an oxygen pipe to directly pass oxygen into the nozzle for cleaning, but this operation is difficult to clean the residual steel on the inner wall of the nozzle, especially It is to carry out the above-mentioned cleaning operation within the limited cleaning time allowed, and it is difficult to ensure the cleaning effect; meanwhile, the above-mentioned operation process without safety facilities is likely to cause personal injury to the operator.

Contents of the invention

The technical problem to be solved by the present invention is to provide a quick cleaning device and cleaning method for the ladle shroud in view of the problems existing in the prior art. High cleaning efficiency ensures the cleaning quality of the long nozzle and stabilizes the steel flow.

The technical solution of the present invention is that the fast cleaning device for the long nozzle of the bale includes a cleaning conduit, one end of the cleaning conduit is connected to an external oxygen tube through a quick locking knob, and the other end of the cleaning conduit is provided for cleaning the long nozzle of the bale. The cleaning head for cleaning, the spray surface of the cleaning head is an arc-shaped vertical structure, and several spray holes are arranged on the arc-shaped surface.

The axes of the spray holes on the spray surface have a certain angle with respect to the spray surface, so as to ensure the rotation of the airflow sprayed from the spray holes.

A cover plate is provided between the cleaning head and the cleaning conduit to prevent air flow and residual steel from splashing upward during the cleaning process.

The method for cleaning using the above-mentioned quick cleaning device for the ladle long nozzle includes:

1) When replacing the bale, move the shroud out of the tundish through the shroud operator and place it above the overflow tank;

2) Put the quick nozzle cleaning device on the long nozzle 6;

3) Open the quick lock knob and let in oxygen;

4) The residual molten steel on the inner wall of the long nozzle melts when it encounters oxygen, and the molten steel is swept away under the action of the airflow.

The quick cleaning device and cleaning method for ladle long nozzle with the above structure has the following advantages:

1. This kind of fast cleaning device for ladle long nozzle greatly improves the cleaning quality of the long nozzle, and at the same time reduces the cleaning time, creates conditions for continuous casting, and avoids shutdown losses caused by improper cleaning or time constraints. At the same time The steel flow is stabilized, the product quality objections caused by it are reduced, and the product quality is improved.

2. This kind of fast cleaning device for long nozzles of ladles is equipped with a cover plate structure, which avoids potential safety hazards to operators and equipment caused by air flow and residual steel splashing upwards during the cleaning process.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural schematic diagram of the present invention.

In Figure 1, 1: cleaning conduit; 2: quick lock knob; 3: cleaning head; 4: cover plate; 5: external oxygen tube; 6: long nozzle.

Detailed ways

Fig. 1 is a schematic structural view of a quick cleaning device for a long nozzle of a large bag according to the present invention, the cleaning device includes a cleaning conduit 1, one end of the cleaning conduit 1 is connected to an external oxygen tube 5 through a quick locking knob 2, and the other end of the cleaning conduit 1 One end is provided with a cleaning head 3 for cleaning the long nozzle of the bale. The spray surface of the cleaning head 3 is an arc-shaped elevation structure, and several spray holes are arranged on the arc-shaped elevation. The axis of the spray hole has a certain angle with respect to the spray surface to ensure that the airflow sprayed from the spray hole rotates, so as to achieve a better spray effect on the ladle drain. A cover plate 4 is provided between the cleaning head 3 and the cleaning conduit 1. The setting of the cover plate 4 avoids potential safety hazards to operators and equipment due to air flow and residual steel splashing upward during the cleaning process.

The method for cleaning using the above-mentioned quick cleaning device for the ladle long nozzle includes:

1) When replacing the bale, move the shroud 6 out of the tundish through the shroud operator and place it above the overflow tank;

2) Put the quick nozzle cleaning device on the long nozzle 6;

3) Open the quick lock knob and let in oxygen;

4) The residual molten steel on the inner wall of the shroud 6 melts when it encounters oxygen, and the molten steel is swept away under the action of the airflow.

This kind of fast cleaning device for ladle long nozzle greatly improves the cleaning quality of the long nozzle, and at the same time reduces the cleaning time, creates conditions for continuous casting, and avoids shutdown losses caused by improper cleaning or time constraints. At the same time The steel flow is stabilized, the product quality objections caused by it are reduced, and the product quality is improved.

Claims (4)

1. A quick cleaning device for long nozzles of bales, characterized in that the cleaning device includes a cleaning conduit (1), and one end of the cleaning conduit (1) is connected to an external oxygen tube ( 5) Connection, the other end of the cleaning conduit (1) is provided with a cleaning head (3) for cleaning the long nozzle of the ladle. The spray surface of the cleaning head (3) has an arc-shaped vertical structure, and the arc-shaped There are several spray holes on the surface. 2. A quick cleaning device for ladle long nozzle according to claim 1, characterized in that: the axis of the spray hole on the spray surface has an angle with respect to the spray surface, so as to ensure The airflow from the spray holes creates a swirl. 3. A quick cleaning device for long spouts of bales according to claim 1 or 2, characterized in that: there is a device between the cleaning head (3) and the cleaning conduit (1) to prevent Cover plate (4) for air flow and upward splash of residual steel. 4. A method for cleaning by using a quick cleaning device for ladle long nozzles according to any one of claims 1-3, characterized in that: the cleaning method includes: 1) When replacing the bale, move the shroud (6) out of the tundish through the shroud operator and place it above the overflow tank; 2) Put the quick nozzle cleaning device on the long nozzle (6); 3) Open the quick lock knob (2) and let in oxygen; 4) The residual molten steel on the inner wall of the shroud (6) melts when it encounters oxygen, and the molten steel is blown away under the action of the airflow.