CN102061354A - Water-cooling furnace opening structure of converter - Google Patents

Abstract

The invention discloses a converter water-cooled furnace mouth structure, two relatively independent left and right fully symmetrical semi-circular box-shaped body structures, a gap as an expansion joint is left at the center line of the two independent water-cooled furnace mouths, and the left semi-circular ring Both the box-shaped body and the right semi-circular box-shaped body are welded with steel plates, and the built-in annular partition forms a water channel. The water-cooled mouth structure of the converter with the above-mentioned envoy structure is two relatively independent left and right fully symmetrical semi-circular box-shaped structures, forming two mutually independent cooling water channels, and the center line of the two independent water-cooled furnace mouths is left There is a gap as an expansion joint, which solves the problem that after the water-cooled furnace mouth is deformed by thermal stress, the inner seamless steel pipe is pulled to form thermal cracks and cause water leakage, which effectively prolongs its own service life and the frequency of replacing the furnace mouth, greatly saving costs. , while eliminating potential safety hazards and ensuring the safety of people and equipment.

Description

A water-cooled furnace mouth structure for a converter

technical field

The invention relates to the field of converters, in particular to a water-cooled mouth structure of a converter.

Background technique

The existing water-cooled furnace mouth of the converter is an integral box-shaped structure. There is a φ180×25 annular seamless steel pipe inside the water-cooled furnace mouth and welded with the upper and lower steel plates of the water tank to form an integral structure to form a water-cooled furnace mouth annular cooling waterway. In production, due to the seamless steel pipe The thermal stress at the welded part with the water-cooled furnace mouth box cannot be released, causing the φ180×25 seamless steel pipe to crack, resulting in thermal cracks and water leakage, which have the following unfavorable factors for the production and safety of the converter:

1) Since the φ180×25 seamless steel pipe at the water-cooled furnace mouth is often cracked and leaks, it is necessary to repair the welding in time, and the water needs to be cut off and released during the welding repair, and the water should be sent after welding. And other water-cooling parts also have certain damage;

2) Due to the frequent water leakage at the water-cooled furnace mouth, there is a certain corrosion on the refractory materials in the furnace mouth, which will easily lead to molten steel infiltrating into the furnace shell body, causing potential safety hazards;

3) The damage to the water-cooled furnace mouth leads to the regular replacement of the furnace mouth, which seriously affects the production time.

Contents of the invention

The technical problem to be solved by the present invention is to provide a converter water-cooled mouth structure for the problems existing in the prior art, and its purpose is to improve the service life of the water-cooled furnace mouth, shorten the time for replacing the water-cooled furnace mouth, and save the cost of water-cooled furnace mouth spare parts , Eliminate potential safety hazards.

The technical solution of the present invention is that the water-cooled furnace port structure of the converter includes two relatively independent left and right fully symmetrical semi-circular box-shaped structures, and a gap is left as an expansion joint at the center line of the two independent water-cooled furnace ports.

Both the left semi-annular box-shaped body and the right semi-annular box-shaped body are welded by steel plates, and the built-in annular partitions form waterways.

The left semicircular box-shaped body includes a left water inlet pipe, a left water outlet pipe, a left semicircular water cooling box and a left semicircular water cooling pipe, and one end of the left water inlet pipe and the left semicircular water cooling pipe The other end of the left semi-circular water-cooling tube communicates with one end of the water channel inside the partition plate of the left semi-circular water-cooling box, and the other end of the water channel inside the left semi-circular water-cooling box connects with the water channel outside the left semi-circular water-cooling box. One end communicates, and the other end of the water channel outside the left semi-circular water-cooling box communicates with the left water outlet pipe. The above-mentioned left semi-circular box-shaped body forms an independent cooling water channel.

The right semicircular box-shaped body includes a right water inlet pipe, a right water outlet pipe, a right semicircular water-cooled box body and a right semicircular water-cooled pipe, and one end of the right water inlet pipe and the right semicircular water-cooled pipe Connected, the other end of the right semicircular water-cooled pipe communicates with one end of the water channel inside the partition plate of the right semicircular water-cooled box, and the other end of the inner water channel of the right semicircular water-cooled box connects with the water channel outside the right semicircular water-cooled box One end is connected, and the other end of the water channel outside the right semi-circular water-cooling box is connected with the right outlet pipe. The above-mentioned right semi-circular box-shaped body forms an independent cooling water channel.

The gap size is 15mm-40mm.

The gap size is preferably 25mm.

The inner side of the water-cooled furnace mouth adopts two semi-circular seamless steel pipes of φ180×25, and the left water inlet pipe, left water outlet pipe, right water inlet pipe and right water outlet pipe are all made of φ76×6 seamless steel pipes.

A converter water-cooled mouth structure with the above special structure has the following advantages:

1. The water-cooled furnace mouth structure of this kind of converter is two relatively independent left and right fully symmetrical semi-circular box-shaped body structures, forming two mutually independent cooling water channels, and there is a hole at the center line of the two independent water-cooled furnace mouths for expansion The gap between the joints solves the problem of water leakage caused by the thermal cracks formed by the seamless steel pipe on the inner side after the water-cooled furnace mouth is deformed by thermal stress.

2. The structure of the water-cooled mouth of the converter effectively prolongs its own service life and the frequency of changing the mouth of the furnace, which greatly saves the cost.

3. The water-cooled mouth structure of the converter eliminates potential safety hazards and ensures the safety of people and equipment.

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.

Fig. 2 is a schematic cross-sectional view of C-C of the structure shown in Fig. 1 .

FIG. 3 is a schematic diagram of rotation of the D-D section of the structure shown in FIG. 1 .

In Figure 1-3, 1: left water inlet pipe; 2: right water inlet pipe; 3: left water outlet pipe; 4: right water outlet pipe; 5: left semicircular water cooling box; 6: right semicircular water cooling box ; 7: left semicircular water cooling tube; 8: right semicircular water cooling tube.

Detailed ways

From the combination of the structures shown in Figure 1-3, it can be seen that the water-cooled furnace mouth structure of the converter includes two relatively independent left and right completely symmetrical semi-circular box-shaped structures, and the centerline of the two independent water-cooled furnace mouths is left as an expansion joint The gap size is preferably 25mm, and the specific size can be determined according to actual needs; the left semi-circular box-shaped body and the right semi-circular box-shaped body are welded with steel plates, and the built-in annular partition forms a water channel.

The specific structure is: the left semi-circular box-shaped body includes a left water inlet pipe 1, a left water outlet pipe 3, a left semicircular water-cooled box body 5 and a left semicircular water-cooled pipe 7, and the left water inlet pipe 1 and the left half One end of the circular water-cooling pipe 7 communicates, the other end of the left semicircular water-cooling pipe 7 communicates with one end of the inner water channel of the left semi-circular water-cooling box 5 partitions, and the other end of the left semi-circular water-cooling box 5 inner water channel communicates with One end of the outer channel of the left semi-circular water-cooling box 5 communicates, and the other end of the outer channel of the left semi-circular water-cooling box 5 communicates with the left outlet pipe 3, and the above-mentioned left semi-circular box-shaped body forms an independent cooling water channel.

The right semi-circular box-shaped body includes a right water inlet pipe 2, a right water outlet pipe 4, a right semicircular water-cooled box body 6 and a right semicircular water-cooled pipe 8, and the right water inlet pipe 2 and the right semicircular water-cooled pipe One end of 8 is communicated, and the other end of right semicircular water-cooled pipe 8 communicates with one end of right semicircular water-cooled box body 6 clapboard inner water channel, and the other end of right semicircular water-cooled box body 6 inner water channel is connected with right semicircular One end of the water channel on the outside of the water-cooled box body 6 communicates, and the other end of the water channel on the outside of the right semicircular water-cooled box body 6 communicates with the right outlet pipe 4, and the above-mentioned right semi-circular box body forms an independent cooling water channel.

Two semi-circular seamless steel pipes of φ180×25 are used on the inner side of the water-cooled furnace mouth, and the left water inlet pipe 1, left water outlet pipe 3, right water inlet pipe 2, and right water outlet pipe 4 are all made of φ76×6 seamless steel pipes.

Taking the applicant's production as an example, the water-cooled furnace mouth with the above structure can double the service life, that is, the service life reaches one year, and there is almost no water leakage within one year, and the time for replacing the water-cooled furnace mouth is shortened from the original 24 hours. For 12 hours, while eliminating potential safety hazards.

Great improvements have also been made in terms of economic benefits:

1) One year saves 3 hours of water-cooled furnace mouth welding repair time × 3 × 12 = 108 hours, saves 12 hours of furnace shell replacement time, and saves a total time of 120 hours a year, calculated on the basis of 40 minutes per furnace of steel, more than one year Production of 180 furnaces of steel; calculated based on the profit of 100 yuan per ton of steel smelting, the annual profit of 180 tons of converter steel production is: 0,100 yuan x 180 x 120 = 2.16 million yuan

2) One set of water-cooled furnace mouth can be saved a year, and spare parts costs can be saved by 70,000 yuan;

The total benefit is 216+7=2.23 million yuan.

Claims (8)

1. A water-cooled furnace port structure for a converter, characterized in that: the furnace port comprises two relatively independent left and right fully symmetrical semicircular box-shaped body structures, and two independent water-cooled furnace port centerlines are left as expansion seam gap. 2. A converter water-cooled furnace mouth structure according to claim 1, characterized in that: the left semi-annular box-shaped body and the right semi-annular box-shaped body are welded by steel plates, and the built-in annular partitions are formed waterway. 3. A converter water-cooled furnace mouth structure according to claim 2, characterized in that: said left semicircular box-shaped body comprises a left water inlet pipe (1), a left water outlet pipe (3), a left semicircular The water-cooled box (5) and the left semicircular water-cooled pipe (7), and the left water inlet pipe (1) communicates with one end of the left semicircular water-cooled pipe (7), and the left semicircular water-cooled pipe (7) The other end of the left semicircular water-cooled box body (5) communicates with one end of the inner water channel of the clapboard, and the other end of the left semicircular water-cooled box body (5) inner water channel communicates with the left semicircular water-cooled box body (5) outer water channel One end communicates with each other, and the other end of the water channel outside the left semicircular water-cooled box body (5) communicates with the left water outlet pipe (3), and the above-mentioned left semicircular box body forms an independent cooling waterway. 4. A converter water-cooled furnace mouth structure according to claim 3, characterized in that: said right semicircular box-shaped body comprises a right water inlet pipe (2), a right water outlet pipe (4), a right semicircular Water-cooled box body (6) and right semicircular water-cooled pipe (8), and described right water inlet pipe (2) communicates with one end of right semicircular water-cooled pipe (8), right semicircular water-cooled pipe (8) The other end of the right semicircular water-cooled box body (6) communicates with one end of the inner water channel of the clapboard, and the other end of the right semicircular water-cooled box body (6) inner water channel communicates with the right semicircular water-cooled box body (6) outer water channel One end communicates with each other, and the other end of the water channel outside the right semicircular water-cooled box body (6) communicates with the right outlet pipe (4), and the above-mentioned right semicircular box body forms an independent cooling waterway. 5. The water-cooled mouth structure of a converter according to any one of claims 1-4, wherein the size of the gap is 15mm-40mm. 6 . The water-cooled furnace mouth structure of a converter according to claim 5 , wherein the size of the gap is 25 mm. 7 . 7. A converter water-cooled furnace mouth structure according to any one of claims 1-4, 6, characterized in that: the inner side of the water-cooled furnace mouth adopts two semi-circular seamless steel pipes of φ180×25, the left Water inlet pipe (1), left water outlet pipe (3), right water inlet pipe (2), right water outlet pipe (4) all adopt φ 76 * 6 seamless steel pipes to make. 8. A converter water-cooled furnace mouth structure according to claim 5, characterized in that: the inner side of the water-cooled furnace mouth adopts two semi-circular seamless steel pipes of φ180×25, the left water inlet pipe (1), the left water outlet pipe (3), right water inlet pipe (2), right water outlet pipe (4) all adopt φ 76 * 6 seamless steel pipes to make.

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