Oxygen lance with cooling system for flash furnace

Abstract

The utility model relates to the technical field of flash furnaces, in particular to an oxygen lance with a cooling system for a flash furnace, which comprises a flange plate connected with a cover plate of the flash furnace, an oxygen lance is fixedly arranged in the middle of the flange plate, the cooling system is arranged on the side surface of the oxygen lance, and the cooling system is used for cooling the bottom of the oxygen lance. Compared with a common traditional oxygen lance, the oxygen lance is provided with a water cooling system, the service life is long, and the possibility of burning loss of the bottom of the oxygen lance is reduced.

Description

Technical Field

[0001] This utility model relates to the field of flash furnace technology, specifically to an oxygen lance with a cooling system for a flash furnace. Background Technology

[0002] The flash smelting process involves thoroughly mixing dried powdered furnace charge, oxygen-enriched air, and auxiliary fuel in a specially designed water-cooled jacket and then injecting the mixture into the reaction tower of a flash furnace at an appropriate speed. The furnace charge is suspended in the reaction tower and gradually falls down. Simultaneously, under high temperature, physical and chemical reactions occur in the gas and solid phases, thereby smelting copper concentrate.

[0003] The flash furnace settling tank is equipped with an oxygen lance for secondary combustion of flue gas. The oxygen lance is made of DN40 stainless steel pipe inserted into the shaped bricks on the furnace roof. Due to the high temperature inside the furnace, the oxygen lance tube section inside the furnace is prone to burnout, making ordinary oxygen lances unsuitable for use in the flash furnace. Summary of the Invention

[0004] In response to the problems raised in the background art, this utility model provides an oxygen lance with a cooling system for a flash furnace to solve these problems. The following is a further description of this utility model.

[0005] An oxygen lance with a cooling system for a flash furnace includes a flange connected to a flash furnace cover plate, an oxygen lance fixedly disposed in the middle of the flange, and a cooling system disposed on the side of the oxygen lance, the cooling system being used to cool the bottom of the oxygen lance;

[0006] Preferably, the cooling system includes an inlet pipe and a return pipe, a water jacket is fixedly installed at the bottom of the oxygen lance, the water jacket has a cavity inside, the inlet pipe passes through the flange and communicates with the cavity inside the water jacket, and the return pipe passes through the flange and communicates with the cavity inside the water jacket.

[0007] Preferably, the cover plate is provided with a flow cavity, the flow cavity is provided with a container, the container is fixedly provided with a connecting pipe, the connecting pipe is connected to the water inlet pipe, the water return pipe is connected to the container, and the flow cavity is connected to the external smelting furnace circulating water system.

[0008] Preferably, the oxygen lance includes a barrel, a gas pipe connector, and a spray nozzle. The barrel is fixed in the middle of the flange, the spray nozzle is fixed at the bottom of the barrel, the gas pipe connector is connected to an external oxygen system, and the gas pipe connector is located on the upper side of the barrel; and the gas pipe connector is sealed and fixedly connected to the barrel.

[0009] Preferably, an adjusting valve is provided at the upper end of the barrel;

[0010] Preferably, a compressed air interface is provided on the other side of the air pipe connector, which can be connected to an external compressed air pump.

[0011] Preferably, a diaphragm solenoid valve is also provided between the compressed air interface and the gun barrel;

[0012] Preferably, a flow meter is installed at the front end of the water inlet pipe;

[0013] Preferably, a controller should be installed on the control cabinet near the DCS system and valve group, and the controller should be electrically connected to the oxygen system, flow meter, compressed air pump, regulating valve and diaphragm solenoid valve.

[0014] Beneficial effects: Compared with the prior art, this utility model has a built-in water cooling system, a longer service life, and reduces the possibility of burn-out at the bottom of the oxygen lance compared with ordinary traditional oxygen lance. When the inside of the nozzle head is blocked by molten slag, compressed air is injected into the compressed air interface through the compressed air pump. The compressed air enters the lance tube through the compressed air interface and is finally discharged through the nozzle head. The strong airflow can clean the molten slag inside the nozzle head and prevent it from being blocked. Attached Figure Description

[0015] Figure 1 : A schematic diagram of the structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Schematic diagram of the structure after removing the cover plate;

[0017] Figure 3 : Schematic diagram of the cross-sectional structure of the flow cavity of this utility model;

[0018] In the diagram: 1. Cover plate; 2. Flange; 3. Oxygen lance; 31. Lance; 32. Gas pipe connector; 33. Spray nozzle; 34. Regulating valve; 4. Cooling system; 5. Flow chamber; 6. Water inlet pipe; 7. Water return pipe; 8. Water jacket; 9. Cavity; 10. Compressed air interface; 11. Diaphragm solenoid valve; 12. Connecting pipe. Detailed Implementation

[0019] Next, we will combine the appendix Figure 1-3 A specific embodiment of this utility model will be described in detail below.

[0020] An oxygen lance with a cooling system for a flash furnace includes a flange 2 connected to a flash furnace cover plate 1, an oxygen lance 3 fixedly disposed in the middle of the flange 2, and a cooling system 4 disposed on the side of the oxygen lance 3, the cooling system 4 being used to cool the bottom of the oxygen lance 3.

[0021] The cooling system 4 includes an inlet pipe 6 and a return pipe 7. A water jacket 8 is fixedly installed at the bottom of the oxygen lance 3. The water jacket 8 has a cavity inside. The inlet pipe 6 passes through the flange 2 and communicates with the cavity inside the water jacket 8. The return pipe 7 passes through the flange 2 and communicates with the cavity inside the water jacket 8.

[0022] The cooling water inside the cavity of the water jacket 8 can absorb the heat from the lower surface of the oxygen lance 3, thereby cooling the oxygen lance 3 and reducing the possibility of burn-out at the bottom of the oxygen lance 3. The water inlet pipe 6 is connected to the furnace body circulating water inlet pipe, and the return water pipe 7 also returns to the furnace body circulating water. All smelting furnaces with cooling systems have a circulating water system to realize the cooling water circulation and maintain its cooling effect.

[0023] A flow passage cavity 5 is provided on the cover plate 1, and a cavity 9 is provided inside the flow passage cavity 5. A connecting pipe 12 is fixedly provided inside the cavity 9. The connecting pipe 12 is connected to the water inlet pipe 6, and the water return pipe 7 is connected to the cavity 9. The flow passage cavity 5 is connected to the external smelting furnace circulating water system to realize water circulation.

[0024] The oxygen lance 3 includes a barrel 31, a gas pipe connector 32, and a spray nozzle 33. The barrel 31 is fixed in the middle of the flange 2, and the spray nozzle 33 is fixed at the bottom of the barrel 31. The gas pipe connector 32 is connected to an external oxygen system. A regulating valve and a flow meter may also be provided between the gas pipe connector 32 and the external oxygen system. An external electronic control system is used to control the opening and closing of the regulating valve to control the flow rate of oxygen entering. The gas pipe connector 32 is located on the upper side of the barrel 31. The gas pipe connector 32 is sealed and fixedly connected to the barrel 31 to ensure that oxygen can be smoothly delivered to 31 and maintain the sealing performance of the system.

[0025] It should be noted that the design of the spray gun head 33 can affect the shape of the gas jet, such as spray or jet, to meet different usage requirements;

[0026] In this embodiment, a regulating valve 34 is provided at the upper end of the gun barrel 31, which can conveniently adjust the oxygen supply when needed. By controlling the opening and closing of the regulating valve 34, the operator can adjust the oxygen flow rate, which is crucial for controlling the oxygen supply rate during the smelting process to ensure that the reaction achieves the ideal effect. In an emergency, quickly closing the regulating valve 34 can quickly cut off the oxygen supply to ensure the safety of the equipment and the operator.

[0027] On the other side of the air pipe connector 32, there is a compressed air interface 10. The compressed air interface 10 can be connected to an external compressed air pump. When the inside of the spray gun head 33 is blocked by molten slag, compressed air is injected into the compressed air interface 10 through the compressed air pump. The compressed air enters the gun barrel 31 through the compressed air interface 10 and is finally discharged through the spray gun head 33. The strong airflow can clean the molten slag inside the spray gun head 33 and prevent it from being blocked.

[0028] A diaphragm solenoid valve 11 is also provided between the compressed air interface 10 and the gun barrel 31. The connection between the compressed air interface 10 and the gun barrel 31 can be controlled by the diaphragm solenoid valve 11. When the inside of the spray gun head 33 is blocked by molten slag, the diaphragm solenoid valve 11 is opened, and then compressed air is injected into the compressed air interface 10 by the compressed air pump. The compressed air enters the gun barrel 31 through the compressed air interface 10 and is finally discharged through the spray gun head 33. The strong airflow can clean the molten slag inside the spray gun head 33 and prevent it from being blocked. If it is not needed, the diaphragm solenoid valve 5 can be closed.

[0029] A flow meter is installed at the front end of the water inlet pipe 6. The flow meter can input data into the DCS display. A controller should be installed on the control cabinet near the DCS system and valve group. The controller is electrically connected to the oxygen system, flow meter, compressed air pump, regulating valve and diaphragm solenoid valve 11. It is set with a program to control them in a unified manner, so as to have the functions of automatic control of oxygen flow of spray gun 3, cooling water flow of water jacket 8 and cleaning of spray gun 3. It has a high degree of automation and can realize remote control and intelligent control.

[0030] Compared with the prior art, this utility model has a built-in water cooling system, a longer service life, and reduces the possibility of burn-out at the bottom of the oxygen lance compared with ordinary traditional oxygen lances. When the inside of the nozzle head is blocked by molten slag, compressed air is injected into the compressed air interface through the compressed air pump. The compressed air enters the lance tube through the compressed air interface and is finally discharged through the nozzle head. The strong airflow can clean the molten slag inside the nozzle head and prevent it from blocking.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lance with a cooling system for a flash furnace, characterized in that: Including the flange (2) connected with the flash furnace cover plate (1), the oxygen lance (3) is fixed in the middle of the flange (2), the cooling system (4) is arranged on the side of the oxygen lance (3), and the cooling system (4) is used for cooling the bottom of the oxygen lance (3); The oxygen lance (3) comprises a lance pipe (31), a gas pipe joint (32) and a spray gun head (33), the lance pipe (31) is fixed in the middle of the flange (2), the spray gun head (33) is fixed at the bottom of the lance pipe (31), the gas pipe joint (32) is connected with an external oxygen system, and the gas pipe joint (32) is arranged on the side of the upper end of the lance pipe (31); and the gas pipe joint (32) is in sealing and fixed connection with the lance pipe (31); A compressed air interface (10) is arranged on the other side of the gas pipe joint (32), and the compressed air interface (10) can be connected with an external compressed air pump.

2. The oxygen lance with cooling system for a flash furnace according to claim 1, characterized in that: The cooling system (4) comprises an inlet pipe (6) and a return pipe (7), a water jacket (8) is fixed at the bottom of the oxygen lance (3), the water jacket (8) is internally provided with a cavity, the inlet pipe (6) penetrates the flange (2) and is communicated with the cavity in the water jacket (8), and the return pipe (7) penetrates the flange (2) and is communicated with the cavity in the water jacket (8).

3. The oxygen lance with cooling system for a flash furnace according to claim 2, characterized in that: A flow cavity (5) is arranged on the cover plate (1), a containing cavity (9) is arranged in the flow cavity (5), a communication pipe (12) is fixed in the containing cavity (9), the communication pipe (12) is connected with the inlet pipe (6), the return pipe (7) is communicated with the containing cavity (9), and the flow cavity (5) is connected with an external smelting furnace circulating water system.

4. The oxygen lance with cooling system for a flash furnace according to claim 1, characterized in that: An adjusting valve (34) is arranged on the upper end of the lance pipe (31).

5. The oxygen lance with cooling system for a flash furnace according to claim 4, characterized in that: A diaphragm electromagnetic valve (11) is further arranged between the compressed air interface (10) and the lance pipe (31).

6. The oxygen lance with cooling system for a flash furnace according to claim 3, characterized in that: A flowmeter is mounted at the front end of the inlet pipe (6).

7. The oxygen lance with cooling system for a flash furnace according to claim 6, characterized in that: A controller should be installed on a DCS system and a valve group near a control cabinet, and the controller is electrically connected with an oxygen system, a flowmeter, a compressed air pump, an adjusting valve and the diaphragm electromagnetic valve (11).

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