CN204138693U - A kind of slag-blocking apparatus of converter taphole - Google Patents

Abstract

The utility model provides a slag retaining device for a converter tapping hole, comprising: a tapping trough, a positioning block (3), a positioning rod (4) and a slag retaining plate (5); the tapping trough is closed at one end , the groove structure that the other end is open; Described slag retaining plate (5) is fixed on the middle part of positioning rod (4), and by this positioning rod (4) slag retaining plate (5) is erected on the tap chute In the groove, the slag retaining plate (5) is kept horizontal; the upper end surface of the positioning block (3) is an inclined plane (8), and the inclined plane (8) is used to support the tapping groove above it; the tapping Under the action of gravity of the molten steel flowing into the groove, the groove rotates from the horizontal position along the axis of the positioning rod (4) to the inclined plane (8), so that the slag retaining plate (5) blocks the slag in the molten steel from Tapping chute flows out. The slag blocking device can filter the steel slag flowing out together with the molten steel, thereby improving the utilization rate of the molten steel in the furnace while ensuring the purity of the molten steel.

Description

A slag retaining device for a converter tapping hole

technical field

The utility model relates to the technical field of metallurgy, in particular to a converter tapping slag blocking device.

Background technique

With the continuous development of the domestic steel structure construction industry, section steel is gradually becoming one of the important raw materials for steel in this field. However, due to the complexity of the profile steel section, coupled with the limitations of the rolling process and post-rolling cooling control means, how to improve the performance of the finished product has become an important problem restricting the production of high-quality profile steel products.

At present, in order to smoothly improve the production qualification rate of high-quality section steel products, it is mainly achieved by means of narrow composition control, improving the purity of molten steel, and increasing controlled rolling and controlled cooling processes. During the production of high-quality section steel, when the converter is tapping, it is necessary to reserve more molten steel in the converter to prevent the steel slag at the bottom of the furnace from flowing out together with the molten steel. Although the move improves the purity of continuous casting molten steel, it reduces the utilization rate of molten steel at the same time.

Utility model content

The purpose of this utility model is to improve the utilization rate of molten steel under the premise of ensuring the purity of molten steel in converter tapping; the utility model provides a slag blocking device for a converter tapping hole; The steel slag flowing out together with the molten steel improves the utilization rate of the molten steel in the furnace while ensuring the purity of the molten steel.

In order to achieve the above purpose, a slag retaining device for a converter taphole of the present invention includes: a tapping trough, a positioning block, a positioning rod and a slag retaining plate. The tapping chute is a groove structure with one end closed and the other end open; the slag retaining plate is fixed in the middle of the positioning rod, and the slag retaining plate is erected in the groove of the tapping chute through the positioning rod , the slag retaining plate is kept horizontal; the upper end surface of the positioning block is an inclined plane, and the inclined plane is used to support the tapping groove above it; The position is rotated down to the slope along the axis of the positioning rod, so that the slag retaining plate can block the steel slag in the molten steel from flowing out of the steel chute, which can not only eliminate the pollution of the steel slag to the molten steel, but also effectively improve the utilization rate of the molten steel. It lays the foundation for the improvement of the surface quality of subsequent finished products.

As a further improvement of the above technical solution, the tapping spout includes a tapping spout shell and a tapping spout liner. The tapping spout liner is nested in the tapping spout shell, and the positioning rods respectively penetrate The two side walls of the channel shell and the tapping channel liner.

As a further improvement of the above technical solution, the angle between the upper end surface of the positioning block and the horizontal plane is 5°-20°.

The advantages of a slag retaining device for a converter tapping hole of the utility model are:

1. The tapping trough part of the slag retaining device of the present invention, under the action of gravity of molten steel flowing into the groove, rotates from the horizontal position around the axis of the positioning rod to the slope downwards, so that the slag retaining plate The gap between the furnace and the bottom surface of the groove is reduced, thereby preventing the slag in the molten steel from flowing out of the tapping trough without affecting the flow of the molten steel; while ensuring the purity of the molten steel, the utilization rate of the molten steel in the furnace is improved.

2. The structure of the slag blocking device of the utility model is simple, the processing difficulty of the device itself is low, and no additional auxiliary equipment is needed at the same time, which has the advantages of less investment and less occupied space;

3. The slag blocking device of the present utility model can realize the slag removal function without the need for relevant auxiliary equipment, and is equipped with a tap trough lining that is easy to process and replace; the service life of the device is improved.

Description of drawings

Fig. 1 is a schematic structural diagram of a slag blocking device in an embodiment of the present invention.

Fig. 2 is a schematic diagram of the position of the slag retaining device in Fig. 1 when molten steel is not poured.

Fig. 3 is a schematic diagram of the position of the slag retaining device in Fig. 1 when pouring molten steel.

Fig. 4 is a schematic diagram of the lining structure of the tapping channel in the utility model.

Fig. 5 is a structural schematic diagram of the tap chute shell in the utility model.

reference sign

1. Tapping channel shell 2. Tapping channel lining 3. Positioning block

4. Positioning rod 5. Slag retaining plate 6. Through hole

7. Tapping channel 8. Inclined surface

Detailed ways

A slag blocking device for a converter tapping hole described in the present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a slag retaining device for a converter tapping hole of the utility model includes: a tapping channel (not shown), a positioning block 3, a positioning rod 4 and a slag retaining plate 5; The groove is a groove structure with one end closed and the other end open; the slag retaining plate 5 is fixed in the middle of the positioning rod 4, and the slag retaining plate 5 is erected in the groove of the tapping trough through the positioning rod 4, The slag retaining plate 5 is kept horizontal; as shown in Figure 2, the upper end surface of the positioning block 3 is an inclined plane 8, and the inclined plane 8 is used to support the tapping groove 7 above it; Under the action of gravity of the molten steel flowing into its groove, the steel groove 7 rotates from the horizontal position along the axis of the positioning rod 4 to the inclined plane 8, so that the slag retaining plate 5 blocks the steel slag in the molten steel from flowing out of the tapping groove .

Based on the structure of the above-mentioned slag blocking device, the tapping spout may include the tapping spout lining 2 in Fig. 4 and the tapping spout shell 1 in Fig. 5, and the tapping spout lining 2 is nested in the In the steel channel shell 1 , the positioning rods respectively pass through the through holes 6 provided on the two side walls of the tapping channel shell 1 and the tapping channel liner 2 . The included angle between the upper end surface of the positioning block and the horizontal plane may be 5°-20°. In this embodiment, the angle between the upper end surface of the positioning block and the horizontal plane is 15°. In addition, the tapping spout casing, positioning block, positioning rod and slag retaining plate can be made of steel, and the tapping spout lining can be made of refractory material.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than limit them. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present utility model does not depart from the spirit and scope of the technical solution of the present utility model, and all of them should cover In the scope of the claims of the present utility model.

Claims (3)

1. a slag-blocking apparatus for converter taphole, is characterized in that, comprising: tapping spout, preset pieces (3), backstay (4) and skimming plate (5); Described tapping spout is the groove structure that one end is closed, the other end is uncovered; Described skimming plate (5) is fixed on the middle part of backstay (4), and is set up in the groove of tapping spout by this backstay (4) by skimming plate (5), and this skimming plate (5) keeps being horizontally disposed with; The upper surface of described preset pieces (3) is inclined-plane (8), and this inclined-plane (8) are for supporting the tapping spout above it; Described tapping spout is under the action of gravity flowing into molten steel in its groove, be swung down to inclined-plane (8) along the axis of backstay (4) as circumference from level attitude, stop that to make skimming plate (5) slag in molten steel flows out from tapping spout.

2. the slag-blocking apparatus of converter taphole according to claim 1, it is characterized in that, described tapping spout comprises tapping spout shell (1) and tapping spout liner (2), described tapping spout liner (2) is nested in tapping spout shell (1), and described backstay (4) runs through two sidewalls of tapping spout shell (1) and tapping spout liner (2) respectively.

3. the slag-blocking apparatus of converter taphole according to claim 1, is characterized in that, the angle between the upper surface of described preset pieces (3) and horizontal plane is 5 ° ~ 20 °.