CN215209534U

CN215209534U - Carbon powder blowing device for primary and secondary tanks of electric arc furnace

Info

Publication number: CN215209534U
Application number: CN202120965296.6U
Authority: CN
Inventors: 王金; 吴宝成; 刘乃强; 刘亚利; 胡长伟; 刘卫东; 马瑞彪; 朱宏伟
Original assignee: Tangshan Zhengfeng Iron&steel Co ltd
Current assignee: Tangshan Zhengfeng Iron&steel Co ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-12-17
Anticipated expiration: 2031-05-08

Abstract

The utility model relates to an electric arc furnace primary and secondary jar carbon powder blowing device belongs to metallurgical industry electric arc furnace smelting equipment technical field. The technical scheme is as follows: one carbon powder outlet at the lower part of the mother tank (1) is connected with the top of the sub-tank A (2) through a mother tank outlet valve A (7) and a sub-tank A inlet valve (8), the other carbon powder outlet at the lower part of the mother tank (1) is connected with the top of the sub-tank B (3) through a mother tank outlet valve B (9) and a sub-tank B inlet valve (10), two carbon powder outlets at the lower part of the sub-tank A (2) are respectively connected with a carbon powder gun III (M3) and a carbon powder gun IV (M4), and two carbon powder outlets at the lower part of the sub-tank B (3) are respectively connected with a carbon powder gun I (M1) and a carbon powder gun II (M2); six pressurizing pipelines of the compressed air tank (4) are respectively connected with the sub-tank and the carbon powder gun through respective pressurizing valves (6). The utility model has the advantages that: can improve the carbon spraying efficiency, shorten the smelting period and improve the service life of the electric furnace.

Description

Carbon powder blowing device for primary and secondary tanks of electric arc furnace

Technical Field

The utility model relates to an electric arc furnace primary and secondary jar carbon powder blowing device belongs to metallurgical industry electric arc furnace smelting equipment technical field.

Background

At present, an electric arc furnace is generally provided with a set of carbon powder injection system in the smelting production process, because only one set of carbon powder injection system is provided, the carbon powder is supplied slowly, the erosion of furnace wall bricks is serious, the furnace life is short and generally does not exceed 600 furnaces, and a carbon powder gun can only stop injecting carbon when supplementing carbon powder, so that the production rhythm is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electric arc furnace primary and secondary jar carbon powder spouts blows device can improve and spout carbon efficiency, shortens the smelting cycle, improves the electric stove age, solves the problem that exists among the background art.

The technical scheme of the utility model is that:

an electric arc furnace primary and secondary tank carbon powder blowing device comprises a primary tank, a secondary tank A, a secondary tank B, a compressed air tank, a pressurizing valve, a primary tank outlet valve A and a secondary tank A inlet valve, the carbon powder spraying device comprises a main tank outlet valve B, a sub-tank B inlet valve, a carbon powder gun I, a carbon powder gun II, a carbon powder gun III and a carbon powder gun IV, wherein the sub-tank A and the sub-tank B are positioned below the main tank; six pressurizing pipelines are led out from the compressed air tank and are respectively connected with the sub-tank A, the sub-tank B, the first carbon powder gun, the second carbon powder gun, the third carbon powder gun and the fourth carbon powder gun through respective pressurizing valves.

And the sub tank A and the sub tank B are respectively connected with the mother tank through an emptying pipeline and an emptying valve.

And flow valves are respectively arranged at the two carbon powder outlets of the lower part of the sub-tank A and the two carbon powder outlets of the lower part of the sub-tank B.

When the electric arc furnace is used, carbon powder in the main tank is added into the two sub-tanks, and four carbon powder guns equipped in the two sub-tanks can spray carbon into the electric arc furnace simultaneously through pressurization; when the carbon powder in the sub-tank A is insufficient and the carbon powder is supplemented, the two carbon powder guns connected with the sub-tank B can continuously keep spraying carbon, and vice versa.

The utility model has the advantages that: greatly improves the carbon spraying efficiency, shortens the smelting period, greatly improves the furnace life of the electric furnace from 600 furnaces to over 900 furnaces.

Drawings

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

in the figure: the carbon powder gun comprises a mother tank 1, a son tank A2, a son tank B3, a compressed air tank 4, an emptying valve 5, a pressurizing valve 6, a mother tank outlet valve A7, a son tank A inlet valve 8, a mother tank outlet valve B9, a son tank B inlet valve 10, a flow valve 11, a carbon powder gun I M1, a carbon powder gun II M2, a carbon powder gun III M3 and a carbon powder gun IV 4.

Detailed Description

The invention will be further explained by way of example with reference to the accompanying drawings.

Referring to the attached figure 1, the carbon powder blowing device for the primary and secondary tanks of the electric arc furnace comprises a primary tank 1, a secondary tank A2, a secondary tank B3, a compressed air tank 4, a pressurizing valve 6, a primary tank outlet valve A7 and a secondary tank A inlet valve 8, the carbon powder spraying device comprises a mother tank outlet valve B9, a son tank B inlet valve 10, a carbon powder gun I M1, a carbon powder gun II M2, a carbon powder gun III M3 and a carbon powder gun IV 4, wherein a son tank A2 and a son tank B3 are all located below a mother tank 1, two carbon powder outlets are respectively arranged at the lower parts of the mother tank 1, the son tank A2 and the son tank B3, one carbon powder outlet at the lower part of the mother tank 1 is connected with the top of a son tank A2 through a mother tank outlet valve A7 and a son tank A inlet valve 8, the other carbon powder outlet at the lower part of the mother tank 1 is connected with the top of a son tank B3 through a mother tank outlet valve B9 and a son tank B inlet valve 10, two carbon powder outlets at the lower part of a son tank A2 are respectively connected with a carbon powder gun III M3 and a carbon powder gun IV M4, and two carbon powder outlets at the lower part of a son tank B3 are respectively connected with a carbon powder gun M1 and a carbon powder gun M2; six pressurizing pipelines are led out from the compressed air tank 4 and are respectively connected with the sub-tank A2, the sub-tank B3, the first carbon powder gun M1, the second carbon powder gun M2, the third carbon powder gun M3 and the fourth carbon powder gun M4 through respective pressurizing valves 6.

In this embodiment, carbon powder capacity of mother tank 1 is 30m, both of sub-tanks a2 and B3 are 2m, and mother tank 1 can be replenished with carbon powder from two sub-tanks simultaneously or separately. And the two carbon powder outlets at the lower part of the sub-tank A2 and the two carbon powder outlets at the lower part of the sub-tank B3 are respectively provided with a flow valve 11. The sub-tank A2 and the sub-tank B3 are connected to the mother tank 1 through an evacuation line and an evacuation valve 5, respectively.

When carbon powder needs to be added to the sub-tank A2 and the sub-tank B3 at the same time, firstly, the emptying valve 5 of the sub-tank A2 and the sub-tank B3 is opened, the pressure in the sub-tank A2 and the sub-tank B3 is emptied, when the pressure is reduced to 0, the inlet valve 8 of the sub-tank A and the inlet valve 10 of the sub-tank B are opened, then the outlet valve A7 of the mother tank and the outlet valve B9 of the mother tank are opened, carbon powder is added to the sub-tank A2 and the sub-tank B3, after the set tonnage is reached, the outlet valve A7 of the mother tank, the outlet valve B9 of the mother tank, the inlet valve 8 of the sub-tank A and the inlet valve 10 of the sub-tank B are closed, then the sub-tank A2 and the sub-tank B3 are pressurized through the pressurization pipeline and the pressurization valve, the pressure is kept after the set value is reached, and the four carbon powder guns normally work under the air pressure.

When the carbon powder in the sub-tank A2 is insufficient and needs to be independently supplemented, the sub-tank B3 is normally used, an emptying valve of the sub-tank A2 is opened, the air pressure in the sub-tank A2 is emptied, when the pressure is reduced to 0, an inlet valve 8 of the sub-tank A is opened, an outlet valve A7 of the main tank is opened, then the carbon powder is added into the sub-tank A2 and is added to a set tonnage, the outlet valve A7 of the main tank and the inlet valve A8 of the sub-tank A are closed, then the sub-tank A2 is pressurized through a pressurization pipeline and a pressurization valve, the pressure is kept after the carbon powder is added to a set value, and the three M3 carbon powder guns and the four M4 carbon powder guns normally operate, and vice versa.

Claims

1. The utility model provides an electric arc furnace primary and secondary jar carbon powder injection apparatus which characterized in that: comprises a mother tank (1), a son tank A (2), a son tank B (3), a compressed air tank (4), a pressure valve (6), a mother tank outlet valve A (7), a son tank A inlet valve (8), a mother tank outlet valve B (9), a son tank B inlet valve (10), a carbon powder gun I (M1), a carbon powder gun II (M2), a carbon powder gun III (M3) and a carbon powder gun IV (M4), wherein the son tank A (2) and the son tank B (3) are both positioned below the mother tank (1), the lower parts of the mother tank (1), the son tank A (2) and the son tank B (3) are respectively provided with two carbon powder outlets, one carbon powder outlet at the lower part of the mother tank (1) is connected with the top of the son tank A (2) through the mother tank outlet valve A (7) and the son tank A inlet valve (8), and the other carbon powder outlet at the lower part of the mother tank (1) is connected with the top of the son tank B (3) through the mother tank outlet valve B (9) and the son tank B inlet valve (10), the two carbon powder outlets at the lower part of the sub-tank A (2) are respectively connected with a carbon powder gun III (M3) and a carbon powder gun IV (M4), and the two carbon powder outlets at the lower part of the sub-tank B (3) are respectively connected with a carbon powder gun I (M1) and a carbon powder gun II (M2); six pressurizing pipelines are led out from the compressed air tank (4), and are respectively connected with the sub-tank A (2), the sub-tank B (3), the first carbon powder gun (M1), the second carbon powder gun (M2), the third carbon powder gun (M3) and the fourth carbon powder gun (M4) through respective pressurizing valves (6).

2. The carbon powder blowing device for the primary and secondary tanks of the electric arc furnace according to claim 1, characterized in that: the sub-tank A (2) and the sub-tank B (3) are respectively connected with the mother tank (1) through an emptying pipeline and an emptying valve (5).

3. The carbon powder blowing device for the primary and secondary tanks of the electric arc furnace according to claim 1, characterized in that: and two carbon powder outlets of the lower part of the sub-tank A (2) and two carbon powder outlets of the lower part of the sub-tank B (3) are respectively provided with a flow valve (11).