Heat dredging device for furnace door of composite submerged arc furnace

Abstract

The utility model provides a heat dredging device of a composite submerged arc furnace door, and belongs to the technical field of submerged arc furnaces. A water tank is arranged below the outer wall of the furnace door; an air feeder is arranged on the side wall of the water tank; a ventilation pipe is arranged at the top of the water tank; and an air outlet is formed in one side wall, close to the composite submerged arc furnace, above the furnace door. Cold air is fed into the air cooling pipeline group in the furnace door through the air feeder and the water tank, and the cold air absorbs heat in the furnace door and is finally discharged into the composite submerged arc furnace from the air outlet from bottom to top. The conditions that the inner wall of the furnace door is eroded by cooling water for a long time, so that the furnace door cracks and leaks water, and a furnace spraying event is caused by a water sump formed at the bottom of the furnace door can be effectively avoided, and hot steam discharged from the furnace door can be blown into the furnace while the furnace door is well cooled, so that heat in the furnace is prevented from overflowing; and the heat to be overflowed at the furnace door is guided into the furnace.

Description

TECHNICAL FIELD

[0001] The utility model provides a kind of heat dredging device of composite ore-heating furnace door, belong to ore-heating furnace technical field. BACKGROUND

[0002] Ore-heating furnace is also called arc furnace or resistance furnace. It is mainly used for reducing smelting ore, carbonaceous reducing agent and solvent and other raw materials. It mainly produces ferrosilicon, manganese iron, chromium iron, tungsten iron, silicon-manganese alloy and other ferroalloy, and is important industrial raw material in metallurgical industry and chemical raw material such as calcium carbide.

[0003] Ore-heating furnace door is cooled by water circulation cooling. Since the outer wall of the ore-heating furnace door is baked by high temperature in the hearth for a long time, and the inner wall of the ore-heating furnace door is eroded by cooling water for a long time, the ore-heating furnace door is prone to crack and water leakage. The water leakage flows to the furnace surface, causing the furnace charge to be hardened and unable to be fully reduced and burned, and the permeability of the furnace charge is weakened, which seriously affects normal smelting production. The temperature at the bottom of the furnace door near the edge of the furnace is relatively low, forming a water pit, which eventually causes the occurrence of the spray furnace event. Based on this, the utility model provides a heat dredging device of composite ore-heating furnace door. UTILITY MODEL CONTENT

[0004] The technical problem solved by the utility model is that the inner wall of the furnace door is eroded by cooling water for a long time, causing the furnace door to crack, leak water, and the bottom of the furnace door to form a water pit, causing the spray furnace event.

[0005] To solve the technical problem, the utility model provides a heat dredging device of composite ore-heating furnace door, which includes a furnace door. A heat dredging cavity is provided on the side of the furnace door away from the composite ore-heating furnace. A group of air cooling pipes is provided in the heat dredging cavity. A water tank is provided below the outer wall of the furnace door. An air blower is provided on the side wall of the water tank for sending air into the water tank. A ventilation pipe is provided on the top of the water tank and is connected to the lower part of the group of air cooling pipes. A plurality of air outlets are provided on the side wall of the furnace door above the composite ore-heating furnace and are connected to the group of air cooling pipes.

[0006] Further, the group of air cooling pipes includes a lower air cooling pipe connected to the ventilation pipe. A plurality of shunt pipes are provided at equal intervals on the top of the lower air cooling pipe. An upper air cooling pipe is provided between the top of the shunt pipes and is connected to the air outlets.

[0007] Further, the side wall of the air blower is provided with an air extraction pipe, and the top of the air blower is provided with an air supply pipe inserted into the lower part of the water tank.

[0008] Further, the end of the air extraction pipe is provided with an activated carbon filter screen.

[0009] Further, a water inlet is provided on one side of the top of the water tank, and a tank cover is threadedly connected to the water inlet.

[0010] Further, the water tank side bottom wall is provided with a drain port, and the drain port is provided with an on-off valve.

[0011] Further, the furnace door is provided with a sealing graphite gasket near the edge of a side wall of the composite submerged arc furnace.

[0012] The utility model discloses beneficial effect has:

[0013] By starting the air blower, the outside air is transported into the water in the water tank through the air extraction pipe, the air blower and the air supply pipe, the cold air is discharged from the air outlet through the ventilation pipe, the lower air cooling pipe, each shunt pipe and the upper air cooling pipe, the air blower and the water tank are used to send the cold air into the air cooling pipeline group in the furnace door, the cold air absorbs the heat in the furnace door and is finally discharged from the air outlet into the composite submerged arc furnace from bottom to top, compared with water circulation cooling, not only can effectively avoid the situation that the furnace door cracks, leaks and forms a water pit at the bottom of the furnace door to cause the furnace blowing event caused by the long-time erosion of the cooling water to the inner wall of the furnace door, but also can achieve the good cooling of the furnace door and the blowing of the hot steam discharged from the furnace door into the furnace, so that the heat in the furnace is also isolated from the outside, and the heat about to overflow from the furnace door is guided into the furnace. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure diagram of the utility model Figure 1 .

[0015] Figure 2 It is the structure diagram of the utility model Figure 2 .

[0016] Figure 3 It is the plane schematic view of the utility model.

[0017] Figure 4 It is the structure diagram of the air extraction pipe of the utility model.

[0018] Figure 5 It is the plane schematic view of the water tank of the utility model.

[0019] 1, furnace door, 2, heat dissipation cavity, 3, air cooling pipeline group, 4, water tank, 5, air blower, 6, ventilation pipe, 7, air outlet, 8, lower air cooling pipe, 9, shunt pipe, 10, upper air cooling pipe, 11, air extraction pipe, 12, air supply pipe, 13, activated carbon filter screen, 14, water inlet, 15, tank cover, 16, drain port, 17, on-off valve, 18, sealing graphite gasket. DETAILED DESCRIPTION

[0020] The utility model is further explained in connection with the drawings.

[0021] According to the drawings Figure 1 , 2The utility model provides a kind of heat dredging device of composite ore-heating furnace door: including furnace door 1, furnace door 1 is equipped with sealing graphite washer 18 in the side wall edge place of one side close to composite ore-heating furnace, graphite washer still can keep good performance under high temperature, this makes it show excellent in high temperature environment, can play good sealing effect to composite ore-heating furnace;

[0022] As shown in the description accompanying drawings Figure 1 、 3 , 5: the side of furnace door 1 away from composite ore-heating furnace is equipped with heat dredging cavity 2, heat dredging cavity 2 is equipped with air cooling pipeline group 3, the lower portion of furnace door 1 outer wall is equipped with water tank 4, one side of water tank 4 top portion is equipped with water inlet 14, water inlet 14 is screw-threaded with tank cover 15, opening tank cover 15 can add cooling water into water tank, the side bottom wall of water tank 4 is equipped with drain 16, and switch valve 17 is equipped on drain 16, and residual cooling water in water tank 4 can be discharged from drain 16 by opening switch valve 17.

[0023] As shown in the description accompanying drawings Figure 1 、 2 , 3, 4: the side wall of water tank 4 is equipped with air blower 5 for sending air to water tank 4, and the top of water tank 4 is equipped with ventilation pipe 6 connected with the lower portion of air cooling pipeline group 3, and the side wall of furnace door 1 is equipped with a plurality of air outlets 7 connected with air cooling pipeline group 3 above composite ore-heating furnace, air cooling pipeline group 3 includes lower air cooling pipe 8 connected with ventilation pipe 6, a plurality of shunt pipes 9 are equidistantly arranged on the top of lower air cooling pipe 8, upper air cooling pipe 10 is arranged between the top of shunt pipe 9 and connected with air outlet 7, air suction pipe 11 is arranged on the side wall of air blower 5, and activated carbon filter screen 13 is arranged on the end of air suction pipe 11, so that the air flowing into composite ore-heating furnace is not provided with impurities, and the quality of composite ore is not affected, air supply pipe 12 is arranged on the top of air blower 5 and inserted into the lower portion of water tank 4, external air is transported into water in water tank 4 through air suction pipe 11, air blower 5 and air supply pipe 12, and cold air is obtained by generating bubbles, and the cold air is transported into each shunt pipe 9 through ventilation pipe 6 and lower air cooling pipe 8, and then flows into upper air cooling pipe 10 and is discharged from air outlet 7.

[0024] The principle of the utility model

[0025] In use, the furnace door 1 is closed and sealed by the sealing graphite gasket 18, the combined electric arc furnace is operated, the box cover 15 is opened to add cooling water into the water tank, the activated carbon filter screen 13 filters and adsorbs impurities by starting the air blower 5, the external air is transported into the water in the water tank 4 through the air suction pipe 11, the air blower 5 and the air supply pipe 12, air bubbles are generated to obtain cold air, the cold air is transported into each branch pipe 9 through the air duct 6 and the lower air cooling pipe 8, then flows into the upper air cooling pipe 10 and is discharged from the air outlet 7, the air blower 5 and the water tank 4 are used to send the cold air into the air cooling pipe group 3 in the furnace door 1, the cold air absorbs the heat in the furnace door 1, and finally is discharged from the air outlet 7 into the combined electric arc furnace from bottom to top, compared with water circulation cooling, not only can effectively avoid the situation that the furnace door 1 is cracked, water leakage and water accumulation pit is formed at the bottom of the furnace door, which causes the furnace blowing event, but also can achieve good cooling of the furnace door 1 and blowing the hot steam discharged from the furnace door 1 into the furnace, so as to isolate the heat in the furnace from overflowing outward, and guide the heat about to overflow outward from the furnace door into the furnace, finally, the heat in the furnace is transported to the waste heat power generation system through the flue gas collecting device to generate power.

[0026] The above describes the utility model and its implementation mode, which is not limited, and the drawings shown are only one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structure modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. A heat dissipation device for a composite gate of an electric arc furnace, comprising a gate (1), characterized in that: The furnace door (1) is provided with a heat dissipation cavity (2) away from one side of the combined electric arc furnace, the heat dissipation cavity (2) is provided with a group of air cooling pipes (3), the lower part of the outer wall of the furnace door (1) is provided with a water tank (4), the side wall of the water tank (4) is provided with a blower (5) for sending air into the water tank (4), the top of the water tank (4) is provided with a ventilation pipe (6) connected with the lower part of the group of air cooling pipes (3), and the upper part of the furnace door (1) is provided with a plurality of air outlets (7) connected with the group of air cooling pipes (3) on the side wall close to the combined electric arc furnace.

2. A heat dissipation device for a combined furnace door of a submerged arc furnace according to claim 1, characterized in that: The group of air cooling pipes (3) comprises a lower air cooling pipe (8) connected with the ventilation pipe (6), and a plurality of shunt pipes (9) are equidistantly arranged on the top of the lower air cooling pipe (8), and an upper air cooling pipe (10) connected with the air outlet (7) is arranged between the top of the shunt pipe (9).

3. A heat dissipation device for a combined furnace door of a submerged arc furnace according to claim 1, characterized in that: The side wall of the blower (5) is provided with an exhaust pipe (11), and the top of the blower (5) is provided with an air supply pipe (12) inserted into the lower part of the water tank (4).

4. A heat dissipation device for a combined furnace door of a submerged arc furnace according to claim 3, characterized in that: The end of the exhaust pipe (11) is provided with an activated carbon filter screen (13).

5. A heat dissipation device for a combined furnace door of a submerged arc furnace according to claim 1, characterized in that: One side of the top of the water tank (4) is provided with a water inlet (14), and the water inlet (14) is threadedly connected with a tank cover (15).

6. A heat dissipation device for a combined furnace door of a submerged arc furnace according to claim 1, characterized in that: The side bottom wall of the water tank (4) is provided with a drain port (16), and the drain port (16) is provided with an on-off valve (17).

7. A heat dissipation device for a combined furnace door of a submerged arc furnace according to claim 1, characterized in that: The edge of the side wall of the furnace door (1) close to the combined electric arc furnace is provided with a sealing graphite gasket (18).

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