KR950008931Y1 - Crushing tube of vaccum degassing process - Google Patents

Abstract

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Description

Easy-to-repair press-fit tube for vessel deposition pipe

1 is an illustration of the reflux state and the refractory melt state during the degassing treatment of molten steel.

2 is an illustration of a state of maintenance by a conventional indentation pipe.

Figure 3 is an illustration of the indentation pipe according to the present invention.

Figure 4 a, b, c is an illustration of the indentation repair process by the indentation pipe of the present invention.

* Explanation of symbols for main parts of the drawings

1: Vessel 2: Wall part of Vessel

3: reflux pipe 4: internal deposition pipe

5: rising pipe 6: falling pipe

7: ladle 8: molten steel

10: press-fit pipe 10a: short can (Short Can)

10b: Long Can 11: Reflux gas line

11a: nozzle 12: reflux gas nozzle protective cover

13: pin 14: glass wool

15: press-fit material inlet 16: riser long can inlet

17: down can long can inlet 18: Vessel bottom edge

20: indentation material

In the present invention, in the degassing of molten steel during the steelmaking process and the manufacture of high clean steel, the molten steel in the ladle is introduced into the vessel through the deposition pipe of the rising pipe to which the reflux gas nozzle is attached at high vacuum. The reflux pipe inside the immersion pipe, the bottom edge of the vessel, and the lower end of the wall of the vessel are largely damaged due to the discharge of the steel pipe into the immersion pipe, so that the injured part can be easily repaired using a press-fit material. It is about.

An illustration of the reflux state and thus the refractory melt state during degassing of the molten steel is shown in FIG.

In the ladle 7, the molten steel 8 is melted upon receiving heat of 1580 ° C. to 1620 ° C., and the molten steel 8 enters the inside of the vessel 1 through the rising pipe 5 and the down pipe 6 is closed. Through repeating the cycle coming out again ladle (7).

During the circulation of the molten steel (8), the wall part (2) of the vessel, the inner part of the deposition pipe (4) of the reflux tube (3), and the bottom edge of the vessel (18) are greatly damaged, thereby repairing the damaged portion. .

As a method of repairing the melted parts, the steel casting process mainly dealing with high-temperature melt is mainly using a spray method that sprays a mixture of water and soft repair material into air. It is mainly used to repair the outside of the refractory, but it is not suitable to repair the inside of the reflux pipe of the degassing and high clean steel manufacturing equipment and the bottom edge of the vessel. Later, using a sealer to supply a mixture of water and soft water repair material in the liquid phase to repair the melted portion of the lead.

Such a conventional method separates and deposits the sedimentation tube of the downcomer 6 as shown in FIG. 2, and introduces the rolled tube of the short can 10a into the reflux tube 3 to intruder ( (Not shown) by supplying the press-fitting material 20 to the shot can (10a) through a hose through the hose, the immersion pipe of the rising pipe (5) is the immersion pipe of the long can (10b) without separating the immersion pipe inside the immersion pipe ( 4) and the inside of the reflux pipe (3) to press the press-fitting material 20, and then the existing reflux gas line 11 is cut and used as a down pipe sedimentation pipe and the press can be completed in the shot can (10a) The downstream side reflux pipe is connected to the new deposition pipe with the reflux gas nozzle (11a) is connected to the vessel (1) to fasten the reflux gas line (11) to be used as the pipe of the rising pipe (5).

Here, the deposition pipe of the ascending pipe 5 is press-fitted in about 75 times to be used as the downcomer 6, and the deposition pipe of the downcomer 6 can be press-ined about 150 times and used continuously, even though it can be used continuously. It is becoming.

When degassing high temperature molten steel, melting of the refractory is inevitable, and its repair can be performed only by indentation.

However, when the press-fitting material 20 is press-fitted in the existing state, the reflux gas nozzle 11a attached to the deposition section of the riser 5 is blocked, and thus the function of the riser 5 of the riser 5 is lost. The indentation method by the indentation pipe 10 of the inlet pipe must be attached to a new deposition pipe with a reflux gas nozzle 11a attached thereto after separating and indenting any one of the deposition pipes of the rising pipe 5 or the down pipe 6. do.

However, if you examine the true intuition that is separated and abolished, the condition of the smoke is good and it is discontinued even though it is possible to continue the phase.

The present invention is devised to improve the above-described problems, the deposition pipe of the rising pipe 5 with the reflux gas nozzle 11a attached to the press-fit pipe 10 of the present invention is improved without separating the deposition pipe. By press-fitting the press-fitting material (20) to continue to be used as a rising pipe (5) to extend the number of uses of the immersion pipe while reducing the number of replacement of the immersion pipe to shorten the repair work time, As it can be extended significantly, it will be described in detail based on the accompanying drawings.

3 is an exemplary view of the indentation pipe 10 according to the present invention.

In the press-fitting material inlet 15 is exposed to the lower side and the injection pipe 16a is piped therein, and the press-fitting pipe 10 through which the discharge port is perforated in many places on the outer circumferential surface, the reflux gas nozzle on the lower outer circumferential surface of the press-fitting pipe 10. The protective cover 12 is maintained at an appropriate height to be integrally attached to the indentation pipe 10, and a plurality of fins 13 are formed to protrude from the upper surface of the reflux gas nozzle protective cover 12 to form the glass wool 14. Inserted, but the upper side of the reflux gas nozzle protection cover 12 is formed in the press injection material injection pipe (15a) having a press injection material injection hole 15, the rising pipe long can injection port 16 is connected to the upper side The through-can injection pipe 16a is provided, but the discharge port 16b is formed in the outer periphery of the press-fit pipe 10.

An embodiment of the present invention configured as described above will be described.

An embodiment of the present invention is specifically illustrated in FIG. 4 a, b, c.

Inside the ascending pipe 5 of the vessel 1 in which the reflux gas line 11 and the nozzle 11a are installed, a pressure pipe 10 of the present invention is inserted and installed as shown in FIG. 6), after tightening the existing long can press-fit pipe (10b), the press-fit with a press-fitting material (20).

In addition, as shown in FIG. 4A, a press-fit hose (not shown) is connected to the press-fit material inlet 15 to inject the press-fit material 20 into a small portion around the upper side of the reflux gas nozzle protection cover 12. Primary press-in is performed so that the press-fit material 20 may be discharged. At this time, the glass wool 14 on the reflux gas nozzle protection cover 12 has the outer circumferential surface abutted on a nonuniform surface inside the immersion pipe when the indentation material 20 leaked out to the lower side of the reflux gas nozzle protection cover 12. There is an effect to prevent.

In this manner, after the first indentation is completed, as shown in FIG. 4B, the indentation material 20 of the downcomer 6 is completely filled by installing the second indentation in the same manner as before, and the downcomer 6 After the press-fitting is completed, connect the hose to the press-fitting pipe 10 inlet of the rising pipe 5 again, and press-fit again to complete the filling as shown in FIG. After the indentation is finished, the indentation is completed by curing for a certain period of time.

In this way, the nozzle 11a can be repaired in the ascending pipe 5 to which the main surface reflux gas line 11 and the nozzle 11a are attached. Completely repair the bottom edges (18) of the vessel (1), the wall part (2) of the vessel, the reflux tube (3) and the riser tube (5) and the downcomer tube (6) without the sedimentation tube of (6). As a result, the life of the immersion pipe can be extended, and the replacement cycle of the immersion pipe can be greatly extended.

Claims (1)

In the press-fitting material inlet 15 is exposed to the lower side and the injection pipe 16a is piped therein, and the press-fitting pipe 10 through which the discharge port is perforated in many places on the outer circumferential surface, the reflux gas nozzle on the lower outer circumferential surface of the press-fitting pipe 10. The protective cover 12 is maintained at an appropriate height to be integrally attached to the indentation pipe 10, and a plurality of fins 13 are formed to protrude from the upper surface of the reflux gas nozzle protective cover 12 to form the glass wool 14. Inserted, but the upper side of the reflux gas nozzle protection cover 12 is formed in the press injection material injection pipe (15a) having a press injection material injection hole 15, the rising pipe long can injection port 16 is connected to the upper side Easy-to-repair vessel of the vessel deposition tube, characterized in that the tube can be injected pipe (16a) is installed, but the discharge port (16b) is formed by the outer periphery of the press-fit pipe (10).