CN215924984U

CN215924984U - Slag skimmer and iron runner for blast furnace

Info

Publication number: CN215924984U
Application number: CN202121800132.4U
Authority: CN
Inventors: 赵伟; 张锦军; 苏明叶; 陈曦; 杨道彬
Original assignee: Nanjing Iron and Steel Co Ltd
Current assignee: Nanjing Iron and Steel Co Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-03-01
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a blast furnace skimmer and a tapping runner, wherein the skimmer comprises a large gate, an aisle arranged below the large gate, a small well arranged behind the large gate and connected with the aisle, and a branch runner head connected with the small well, wherein the aisle and the small well are arranged along the same straight line, and the branch runner head is arranged on the side surface of the small well perpendicular to the straight line. The tapping runner comprises a main runner and a branch runner, wherein the extension directions of the main runner and the branch runner are mutually vertical, and the blast furnace skimmer is connected between the main runner and the branch runner. This blast furnace skimmer has changed the direction of export for when the iron notch design, can fully prolong the main trough in the same place, reduce the slag-iron velocity of flow in the main trough, increase slag-iron separation effect, take the iron in the reduction sediment, increase molten iron output, also ensure production safety.

Description

Slag skimmer and iron runner for blast furnace

Technical Field

The utility model relates to a blast furnace tapping device, in particular to a blast furnace skimmer and a tapping runner.

Background

As shown in FIG. 3, the blast furnace tapping runner includes a main runner, a skimmer, and a branch runner. A skimmer, namely a slag-iron separator, is a device for separating slag and iron in the tapping process of a blast furnace. The front part of the main ditch is provided with a ditch and a sand dam which play a role in deslagging; the middle part is a big gate, and a passage below the big gate is communicated with the main ditch and is a molten iron passage; the rear part is provided with a small well and a branch ditch head, the bottom of the small well is connected with the passage, the upper part of the small well is connected with the bottom of the branch ditch head, and the molten iron flows out of the small well, enters the branch ditch head and then flows to the molten iron tank along the branch ditch. At present, in all skimmer designs, a passageway, a small well and a branch ditch head are all on the same central line. And the main runner of the tapping runner and the skimmer are on the same central line, and the branch runner extends a section of length from the head of the branch runner of the skimmer backwards along the central line and then turns out a bent runner to guide the molten iron to the molten iron tank.

However, due to the change of the industrial situation, the occupied area of the newly-built blast furnace is greatly reduced, the tapping site is compact, and if the slag skimmer and the tapping runner are designed according to the method, the length of the main runner is correspondingly shortened. After the length of the main channel is shortened, the flow speed of liquid iron slag in the main channel is accelerated, the iron slag separation effect is deteriorated, and the slag is easy to carry iron, so that dangerous accidents are caused.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to overcome the disadvantages of the prior art, the present invention provides a blast furnace skimmer that can ensure the main runner length of a tapping runner in a compact field.

It is another object of the present invention to provide a runner having the above-described blast furnace skimmer.

The technical scheme is as follows: the utility model relates to a blast furnace skimmer which comprises a large gate, an aisle arranged below the large gate, a small well arranged behind the large gate and connected with the aisle, and a branch trench head connected with the small well, wherein the aisle and the small well are arranged along the same straight line, and the branch trench head is arranged on the side surface of the small well in a manner of being vertical to the straight line.

The tapping runner with the blast furnace skimmer provided by the utility model comprises a main runner and a branch runner which extend in mutually perpendicular directions, and the blast furnace skimmer is connected between the main runner and the branch runner.

Has the advantages that: compared with the prior art, the direction of the outlet of the blast furnace skimmer is changed, so that when the tapping runner is designed, the main runner can be fully prolonged in the same place, the flow speed of iron slag in the main runner is reduced, the iron slag separation effect is increased, the iron content in slag is reduced, the yield of molten iron is increased, and the production safety is also guaranteed. Meanwhile, the branch trench is changed into a straight trench instead of a bay trench, so that the manufacturing cost is reduced, the iron content is increased, the service life is prolonged, the maintenance cost is reduced, and the labor intensity of operators is reduced. In addition, the tapping site can be designed to be more compact, the investment is reduced, the tapping site is smooth after the branch trench bending trench is eliminated, the manufacture of a branch trench cover is simplified, the sealing performance of the branch trench cover is improved, the cost is reduced, and the negative pressure dust removal effect is improved.

Drawings

FIG. 1 is a schematic view of the runner structure of the present invention;

FIG. 2 is a schematic cross-sectional view of a skimmer of the present invention;

FIG. 3 is a schematic view of a prior art runner structure.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the blast furnace skimmer comprises a large gate 1, a passageway 2 arranged below the large gate 1, a small well 3 arranged behind the large gate 1 and connected with the passageway 2, and a branch trench head 4 connected with the small well 3. Compared with the existing skimmer, the position of the branch ditch head 4 of the skimmer is changed, and the branch ditch head is not arranged at the tail end of the small well 3, but is arranged at the side surface of the small well 3, and the central line of the branch ditch head is perpendicular to the straight line arranged by the passageway 2 and the small well 3, namely the central line of the branch ditch head is perpendicular to the central lines of the passageway 2 and the small well 3.

Thus, the tapping runner using the skimmer can be changed accordingly, and specifically, the main runner 5 and the branch runner 6 both use straight runners perpendicular to each other. The main trench 5 can be extended in length and is arranged in the same line with the passage 2 and the small well 3. The branch gully 6 extends linearly in the direction of the branch gully head 4, and the center line thereof overlaps with the center line of the branch gully head 4.

At a certain 1800m³For example, the blast furnace adopts the iron runner redesigned by the technical scheme, and compared with the original iron runner, the area of a cast house is not changed on the basis of the original frame structure of the main runner, the main runner can be prolonged by more than 3 meters, the flow velocity of the molten iron slag is slowed down, a sufficient distance is reserved for the molten iron slag to float upwards, the molten iron slag can be fully separated, and the iron in the slag is avoided.

In addition, the runner also includes a scrap hole extending from the bottom of the pit 3 toward the scrap runner for maintenance. The residual iron hole is in a blocked and closed state during normal production, and is not shown in the figure.

Claims

1. The utility model provides a blast furnace skimmer, includes big floodgate (1), sets up passageway (2) in big floodgate (1) below, set up in big floodgate (1) the rear with little well (3) that passageway (2) are connected, branch ditch groove head (4) of being connected with little well (3), its characterized in that, passageway (2) with little well (3) are arranged along same straight line, branch ditch groove head (4) are arranged perpendicular to this straight line in the side of little well (3).

2. A runner with a blast furnace skimmer as claimed in claim 1, comprising a main runner (5) and a branch runner (6) extending in mutually perpendicular directions, said blast furnace skimmer being connected between said main runner (5) and said branch runner (6).

3. Tap runner according to claim 2, characterised in that the main runner (5) is arranged in line with the aisle (2) and the pit (3).

4. A runner according to claim 3, characterised in that the centre line of the branch runner (6) overlaps the centre line of the branch runner head (4).

5. The runner according to claim 2, further comprising a stub hole extending from the bottom of the pit (3) towards the runner.