A calcium aluminate electric arc furnace for reducing flue gas dust

Abstract

The utility model relates to the field of smelting equipment, and discloses a calcium aluminate electric arc furnace for reducing flue gas dust, comprising a furnace cover, wherein the furnace cover is provided with a feed port for adding raw materials and a smoke exhaust port for discharging the smoke in the furnace, and further comprising a feed chute and an ash baffle, wherein one end of the feed chute is connected to the feed port, and one end of the feed chute extends into the furnace, and one end of the ash baffle is fixedly connected to a side of the smoke exhaust port close to the feed port, and the ash baffle is longer than the feed chute; the technical problem that the raw material dust at the feed port is easily directly sucked away by the smoke exhaust port in the prior art, resulting in a large workload of the smoke purification system and a high cleaning frequency of the smoke purification system, is solved.

Description

Technical Field

[0001] The utility model relates to the field of smelting equipment, in particular to a calcium aluminate arc furnace capable of reducing smoke dust. Background Art

[0002] An electric arc furnace is an electric furnace that uses the high temperature generated by the electrode arc to melt ores and metals. This equipment converts electrical energy into heat energy through the high-temperature arc generated between the electrode and the charge, thereby melting the charge and completing the subsequent high-temperature metallurgical reaction.

[0003] At present, most electric arc furnaces adopt the top loading method, and a feed port is opened on the furnace cover of the electric arc furnace. In order to lead out the flue gas in the furnace, most electric arc furnaces are equipped with exhaust ports on the furnace cover to meet the use requirements of the electric arc furnace; but the structure of the electric arc furnace is compact and the volume is small, which makes the position of the exhaust port and the feed port close; during the falling process of the raw materials after entering the furnace from the feed port, part of the raw materials are directly sucked away by the negative pressure wind of the exhaust port next to it, and a large amount of raw materials are accumulated in the flue pipe connected to the exhaust port, causing blockage of the flue pipe and waste of raw materials.

[0004] In order to reduce the raw materials being directly sucked away by negative pressure wind, the existing technology first presses the raw materials through a ball press, and then transports the pressed raw material balls to the feed port on the furnace cover and puts them into the electric arc furnace. However, even if the amount of dust can be reduced after the raw materials are pressed, the generation of dust cannot be completely avoided. In addition, the mutual collision of the raw material balls during the falling process will also cause an increase in the amount of dust. This makes the cleaning frequency of the flue gas pipe and the dust collector in the flue gas pipe higher, and the time consumed by the equipment to be shut down for cleaning is longer, affecting the production smelting efficiency. Utility Model Content

[0005] The utility model aims to provide a calcium aluminate arc furnace with reduced flue gas dust, so as to solve the technical problem in the prior art that raw material dust at the feed inlet is easily directly sucked away by the exhaust port, resulting in a large workload of the flue gas purification system and a high cleaning frequency of the flue gas purification system.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a calcium aluminate electric arc furnace for reducing flue gas dust, comprising a furnace cover, the furnace cover is provided with a feed port for adding raw materials and a smoke exhaust port for discharging smoke in the furnace, and also comprises a feed chute and an ash baffle, one end of the feed chute is connected to the feed port, one end of the feed chute extends into the furnace, one end of the ash baffle is fixedly connected to a side of the smoke exhaust port close to the feed port, and the length of the ash baffle penetrating into the furnace is greater than the length of the feed chute penetrating into the furnace.

[0007] The principles and advantages of this solution are: in actual application, the raw materials slide into the furnace from the feed chute, and compared with the direct free fall of the prior art, the raw material balls can enter the furnace more smoothly, reducing the dust generated by impact; and an ash baffle is arranged on the side of the smoke exhaust port close to the feed port, which can also reduce the dust generated by the raw material dust during the falling process from being directly sucked away by the smoke exhaust port on the side; reduce the effect of the negative pressure of the smoke exhaust port on the feed port; and thus reduce the workload of the flue gas purification system, so that the flue gas purification system only processes the waste gas generated by smelting, thereby reducing the cleaning frequency of the flue gas purification system, reducing downtime, and improving raw material utilization.

[0008] As an improvement, the smoke exhaust port is rectangular, and the ash baffle includes side panels and a bottom panel. There are three side panels, which are respectively installed on the side of the smoke exhaust port closest to the feed port and on both sides of the smoke exhaust port adjacent to the side. The bottom panel is located directly below the smoke exhaust port and connects the three side panels.

[0009] The beneficial effect of this improvement is that the ash baffle plate has such a structure that the air suction port of the ash baffle plate is away from the feed port and close to the furnace wall, so that the ash baffle plate is spaced between the smoke exhaust port and the feed port, and the air suction port is in the horizontal direction. The negative pressure of the smoke exhaust port cannot act on the lower end of the feed chute, thereby reducing the dust inside the electric arc furnace taken away by negative pressure ventilation.

[0010] As an improvement, the side panel includes a first side panel and a second side panel, the side panel closest to the feed port is the first side panel, the two side panels adjacent to the first side panel are the second side panels, the second side panel is a right-angled trapezoid, the side where the right-angled waist of the second side panel is located is connected to the smoke exhaust port, the side where the oblique waist of the second side panel is located is connected to the bottom plate, and the length of the parallel side of the second side panel close to the first side panel is less than the length of the parallel side of the second side panel away from the first side panel.

[0011] The beneficial effect of this improvement is that the surface of the air inlet of the ash baffle is enlarged to facilitate smoke discharge, and the bottom plate is inclined to reduce the space occupied by the center of the furnace.

[0012] As an improvement, the length of the parallel side of the second side plate away from the first side plate is greater than the length of the feed chute extending deep into the furnace.

[0013] The beneficial effect of this improvement is that the lower end of the air suction port of the ash baffle plate is staggered with the lower port of the feed chute and is no longer on the same horizontal plane. In the process of the raw material balls falling from the lower port of the feed chute to being accumulated in the furnace, the raw material dust is blocked by the first side plate and the bottom plate, thereby preventing the dust from being directly sucked away by the negative pressure wind during the falling process.

[0014] As an improvement, the feed chute is in the shape of an inclined tube, and the lower end of the feed chute is inclined toward the center of the furnace.

[0015] The beneficial effects of this improvement are: shortening the free fall distance, allowing the raw materials to fall directly into the center of the furnace, and reducing mutual collisions when the raw material balls slide into the furnace.

[0016] As an improvement, the length ratio of the two parallel sides of the second side plate is 2:3.

[0017] As an improvement, the feed chute forms an angle of 60° with the furnace cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0019] Figure 2 A top view of the furnace cover.

[0020] Figure 3 It is a structural schematic diagram of the dust baffle. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The reference numerals in the drawings of the specification include: furnace body 1, feed port 2, smoke exhaust port 3, feed chute 4, ash baffle plate 5, first side plate 6, second side plate 7, bottom plate 8 and electrode port 9.

[0023] Example

[0024] Basically as attached Figure 1 and 2 As shown, a calcium aluminate electric arc furnace for reducing flue gas dust includes a furnace cover, a feed chute 4 and an ash baffle 5. The furnace cover is sealed on the furnace body 1, and the furnace cover is provided with a feed port 2 for adding raw materials and a smoke exhaust port 3 for discharging smoke in the furnace. The feed port 2 and the smoke exhaust port 3 are located on both sides of the electrode port 9, one end of the feed chute 4 is connected to the feed port 2, and one end of the feed chute 4 extends into the furnace.

[0025] As attached Figure 3 As shown, the smoke exhaust port 3 is rectangular, and the ash baffle 5 includes side panels and a bottom panel 8. The side panels are three in number, and the three side panels are respectively installed on the side of the smoke exhaust port 3 closest to the feed port 2 and on both sides of the smoke exhaust port 3 adjacent to the side. The bottom panel 8 is located directly below the smoke exhaust port 3 and connects the three side panels.

[0026] The side panels include a first side panel 6 and a second side panel 7, the side panel closest to the feed port 2 is the first side panel 6, the two side panels adjacent to the first side panel 6 are the second side panels 7, the second side panel 7 is a right-angled trapezoid, the right-angled waist of the second side panel 7 is welded to the smoke exhaust port 3, the oblique waist of the second side panel 7 is welded to the bottom panel 8, the length of the parallel side of the second side panel 7 close to the first side panel 6 is less than the length of the parallel side of the second side panel 7 away from the first side panel 6, so that the bottom panel 8 is inclined; and the air intake port of the ash baffle 5 faces the furnace wall of the electric arc furnace.

[0027] The length ratio of the two parallel sides of the second side plate 7 is 2:3. The length of the parallel side of the second side plate 7 away from the first side plate 6 is greater than the length of the feed chute 4 deep into the furnace. The length of the parallel side of the second side plate 7 close to the first side plate 6 is less than the length of the feed chute 4 deep into the furnace.

[0028] The feed chute 4 is in an inclined tubular shape, and the lower end of the feed chute 4 is inclined toward the center of the furnace. The feed chute 4 and the furnace cover are at an angle of 60°. The feed chute 4 and the ash baffle 5 are both made of 310S stainless steel, which has high oxidation resistance, corrosion resistance and high temperature resistance.

[0029] The raw material balls are transported to the feed port 2 by the transport device, and the raw material balls slide into the center of the furnace along the inclined feed chute 4. As the raw materials in the electric arc furnace are smelted, flue gas is generated, and the flue gas enters the exhaust port 3 along the suction port of the ash baffle 5, and flows to the subsequent flue gas purification treatment; the structure is simple and the manufacturing cost is low, which can effectively reduce the frequency of manual cleaning of the subsequent smoke and air duct and the frequency of cleaning of the bag dust collector.

[0030] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A calcium aluminate electric arc furnace for reducing flue gas dust, comprising a furnace cover, wherein the furnace cover is provided with a feed inlet for adding raw materials and a smoke exhaust port for exhausting the smoke in the furnace, characterized in that: It also includes a feed chute and an ash baffle, one end of the feed chute is connected to the feed port, one end of the feed chute extends into the furnace, one end of the ash baffle is fixedly connected to a side of the smoke exhaust port close to the feed port, and the length of the ash baffle penetrating into the furnace is greater than the length of the feed chute penetrating into the furnace.

2. The calcium aluminate electric arc furnace for reducing flue gas dust according to claim 1, characterized in that: The smoke exhaust port is rectangular, and the ash baffle includes side panels and a bottom panel. There are three side panels, which are respectively installed on the side of the smoke exhaust port closest to the feed port and on both sides of the smoke exhaust port adjacent to the side. The bottom panel is located directly below the smoke exhaust port and connects the three side panels.

3. The calcium aluminate electric arc furnace for reducing flue gas dust according to claim 2, characterized in that: The side panel includes a first side panel and a second side panel, the side panel closest to the feed port is the first side panel, the two side panels adjacent to the first side panel are the second side panels, the second side panel is in a right-angled trapezoid, the side where the right-angled waist of the second side panel is located is connected to the smoke exhaust port, the side where the oblique waist of the second side panel is located is connected to the bottom panel, and the length of the parallel side of the second side panel close to the first side panel is less than the length of the parallel side of the second side panel away from the first side panel.

4. The calcium aluminate electric arc furnace for reducing flue gas dust according to claim 3, characterized in that: The length of the second side plate away from the parallel side of the first side plate is greater than the length of the feed chute extending deep into the furnace.

5. The calcium aluminate electric arc furnace for reducing flue gas dust according to claim 4, characterized in that: The feed chute is in an inclined tubular shape, and the lower end of the feed chute is inclined toward the center of the furnace.

6. The calcium aluminate electric arc furnace for reducing flue gas dust according to claim 5, characterized in that: The length ratio of the two parallel sides of the second side plate is 2:

3.

7. The calcium aluminate electric arc furnace for reducing flue gas dust according to claim 6, characterized in that: The feed chute and the furnace cover form an angle of 60°.

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