A silicon-iron alloy reactor and use method thereof

Abstract

The invention relates to a ferrosilicon alloy reactor and a method for using the same; it relates to the technical field of reactors, and comprises the following steps: starting the reactor, introducing cathode and anode, raising the anode and replacing the anode; after electricity is introduced between the cathode and the anode, furnace charge, silicon carbide powder and silicon monoxide powder are conductors between positive and negative electrodes, and a short circuit occurs; the furnace charge, silicon carbide powder and silicon monoxide powder are electrolyzed as the furnace temperature increases; when the furnace temperature is greater than 2100°C, the silicon carbide powder and silicon monoxide powder begin to react and form a melt; silicon monoxide that does not participate in the reaction is oxidized to silicon dioxide in the atmosphere; iron element can also destroy the intermediate product of the silicon dioxide reduction process; the reaction is moved toward the generation direction; the reaction begins at 1120°C, and reacts violently at 1200-1300°C to generate graphite and ferrosilicon.

Description

Technical Field

[0001] The invention relates to the technical field of reaction furnaces, and in particular to a reaction furnace for ferrosilicon alloy. Background Art

[0002] Ferroalloy refers to an alloy composed of iron and one or more non-metallic or metallic elements, so ferrosilicon is an alloy composed of iron and silicon. As the main raw material for steel smelting and casting, ferrosilicon can effectively improve the mechanical properties and physical and chemical properties of steel and iron castings, and ensure the quality of steel products. In order to reduce the production cost and energy consumption of ferrosilicon, many developed countries also produce other ferrosilicon alloys with lower silicon content, including alloys with silicon content of 10% to 30%. There are also ferrosilicon varieties with a silicon content of about 50% in my country's industrial production planning.

[0003] Chinese patent announcement No. CN201110399477.8 discloses a ferrosilicon alloy reaction furnace, comprising: a furnace body, wherein a heating device and a feeding device are arranged in the furnace body, wherein the heating device is arranged at the top of the furnace body, the feeding device is arranged at the bottom of the furnace body, the feeding device is installed on a guide rail, an electrode is connected to the heating device, and the electrode is connected to an external power supply, and a sealing layer, an electrical insulation layer, a thermal insulation layer and a high-temperature thermal insulation layer are arranged on the inner wall of the furnace body from the inside to the outside.

[0004] The ferrosilicon alloy reactor in the above patent cannot meet the requirements of oxidation-reduction, resulting in the inability of iron and silicon dioxide to combine well to form ferrosilicon alloy. For this reason, we provide a ferrosilicon alloy reactor with high oxidation-reduction reaction, which integrates raw material melting, oxidation-reduction reaction and ferrosilicon alloy generation, greatly improving the production efficiency of ferrosilicon alloy. Summary of the invention

[0005] Technical issues to be solved

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, meet actual needs, and provide a reactor that integrates raw material melting, redox reaction and ferrosilicon alloy production, greatly improving the production efficiency of ferrosilicon alloy, so as to solve the above technical problems.

[0007] Technical Solution

[0008] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0009] A ferrosilicon alloy reactor comprises a furnace tank, both ends of which are provided with insulating pads, two insulating pads are fixedly connected with gantry frames by bolts, and a silo is fixedly installed between the two gantry frames; a mounting plate is provided on one side of the silo, and an anode lifting assembly is installed on the outer side of the mounting plate;

[0010] The anode lifting assembly includes a dual-output shaft motor, which is fixed in the middle position of the top of one side of the silo through a motor mounting base. The two output shafts of the dual-output shaft motor are connected to the transmission shaft through a coupling. The end of each transmission shaft is equipped with a bevel gear assembly and arranged inside the outer protective shell. A screw is also equipped on the bevel gear assembly, and the lower end of the screw is threadedly connected to the lifting barrel; two connecting cross bars are welded between the two lifting barrels.

[0011] As a further technical solution of the present invention, the bevel gear assembly includes two 45-degree bevel gears that are vertically meshed, one of which is connected to the transmission shaft, and the other is installed on the screw, and the top of the screw is connected to the outer shell through a bearing; the outer shell is welded and fixed to the mounting plate through a bracket.

[0012] As a further technical solution of the present invention, a sliding seat is welded on the lifting barrel, and the sliding seat is slidably connected to the sliding rail; the sliding rail is welded on the mounting plate; a fixed seat is also arranged under the sliding rail, and a guide hole is opened on the fixed seat for facilitating the lifting barrel to pass through.

[0013] As a further technical solution of the present invention, an anode fixing plate is fixedly installed on the outer side of the two connecting cross bars, and a small box fixture is fixedly connected to the outer side of the anode fixing plate by bolts; an anode is fixed on each of the small box fixtures.

[0014] As a further technical solution of the present invention, a reverse locking card is arranged on the outer side of the slide, and the reverse locking card includes a rotating card, which is movably connected to the rotating shaft, and a U-shaped groove is opened on the side of the rotating card away from the slide, and a connecting rod is connected in the U-shaped groove through a pin shaft.

[0015] As a further technical solution of the present invention, the bottom of the rotating clamp has a plane, and a fixing column is provided below the plane, and the fixing column is welded to the mounting plate.

[0016] As a further technical solution of the present invention, a side of the silo away from the mounting plate is fixedly connected with a busbar seat by bolts; a plurality of busbars are welded to the outer side of the busbar seat.

[0017] As a further technical solution of the present invention, side guard plates are fixed to the outer sides of the two gantries; four side guard plates are arranged, two in each group, and a horizontal plate is arranged between each group of side guard plates; style plates are arranged on both sides of the furnace trough.

[0018] As a further technical solution of the present invention, the furnace tank comprises a furnace body, the interior of the furnace body is paved with insulation bricks, and a cathode is arranged above the insulation bricks.

[0019] A method for using a ferrosilicon alloy reactor comprises the following steps:

[0020] Step 1: Start the reactor. Lay a layer of furnace charge with a thickness of 15-20cm in the furnace tank. Then lay silicon carbide powder and silicon monoxide powder on top of the furnace charge with a thickness of 30-50cm. Then, pile the furnace charge on the silicon carbide powder and silicon monoxide powder. Then, energize the anode and cathode, and cover the outer side of the side guard plate with a tank cover to insulate the reactor.

[0021] Step 2: After electricity is passed between the cathode and the anode, the charge, silicon carbide powder and silicon monoxide powder are conductors between the positive and negative electrodes and a short circuit occurs. The charge, silicon carbide powder and silicon monoxide powder are electrolyzed as the furnace temperature rises. When the furnace temperature is greater than 2100°C, the silicon carbide powder and silicon monoxide powder begin to react and form a melt. The silicon monoxide that does not participate in the reaction is oxidized into silicon dioxide in the atmosphere.

[0022] Step 3: Add iron into the furnace. The reduction reaction of silicon dioxide is:

[0023] SiO2+2C+nFe=

Si

[0024] Iron can also destroy the intermediate products of the silicon dioxide reduction process, Fe+nSiC=FeSi n +nC; moves the reaction toward the production direction. The reaction starts at 1120℃ and becomes intense at 1200-1300℃, producing graphite and ferrosilicon.

[0025] Step 4: Anode lifting treatment. Under the erosion of the solution, the carbon block at the bottom of the anode is lost, so the anode needs to be lifted upward. When lifting the anode, the dual output shaft motor drives the bevel gear assembly to rotate through the transmission shaft. The two screws rotate under the drive of the bevel gear assembly. At this time, the lifting screw barrel converts the rotational motion of the screw into linear motion, and slides upward along the slide rail through the slide seat. The connecting cross bar lifts all the anodes upward through the cooperation of the anode fixing plate and the small box fixture, thereby realizing the lifting of the anode;

[0026] When the slide seat rises, it pushes the rotating clamp to flip upward, and then when the slide seat moves above the rotating clamp, the rotating clamp flips back again and stays on the fixed column. At this time, the rotating clamp has a blocking and resisting effect on the slide seat to bear the falling force of the anode;

[0027] Step 5: Anode replacement. When the carbon blocks on the anode are consumed, use the hook of the overhead crane to fix the anode, then loosen the bolts on the small box fixture, lift out the anode, and then replace it with a new anode.

[0028] (3) Beneficial effects:

[0029] A. In the present invention, after electricity is passed between the cathode and the anode, the charge, silicon carbide powder and silicon monoxide powder are conductors between the positive and negative electrodes and a short circuit occurs. The charge, silicon carbide powder and silicon monoxide powder are electrolyzed as the furnace temperature increases. When the furnace temperature is greater than 2100°C, the silicon carbide powder and silicon monoxide powder begin to react and form a melt, and the silicon monoxide that does not participate in the reaction is oxidized into silicon dioxide in the atmosphere;

[0030] B. In the present invention, the iron element can also destroy the intermediate product of the silicon dioxide reduction process; it moves the reaction toward the generation direction. This reaction starts at 1120°C and reacts violently at 1200-1300°C to generate graphite and ferrosilicon;

[0031] C. In the present invention, during the anode lifting process, the carbon block at the bottom of the anode is lost due to the erosion of the solution, so the anode needs to be lifted upward. When lifting the anode, the dual output shaft motor drives the bevel gear assembly to rotate through the transmission shaft, and the two screws rotate under the drive of the bevel gear assembly. At this time, the lifting screw barrel converts the rotational motion of the screw into linear motion, and slides upward along the slide rail through the slide seat. The connecting cross bar lifts all the anodes upward through the cooperation of the anode fixing plate and the small box fixture, thereby realizing the lifting of the anode;

[0032] D. In the present invention, when the slide seat rises, it will push the rotating clamp to flip upward. Then when the slide seat moves above the rotating clamp, the rotating clamp flips back again and stays on the fixed column. At this time, the rotating clamp has a blocking and resisting effect on the slide seat to bear the falling force of the anode. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 For the present invention Figure 1 A partial structural diagram of

[0035] Figure 3 For the present invention Figure 2 Left view in;

[0036] Figure 4 For the present invention Figure 3 AA section view;

[0037] Figure 5 For the present invention Figure 3 BB cross-sectional view;

[0038] Figure 6 For the present invention Figure 5 Schematic diagram of the structure of the middle anode lifting assembly;

[0039] Figure 7 For the present invention Figure 1 The enlarged schematic diagram at C in the middle;

[0040] Figure 8 For the present invention Figure 5 The enlarged schematic diagram at D in the middle;

[0041] Fig. 9 For the present invention Figure 4 The enlarged schematic diagram at E in the middle;

[0042] Fig.10 It is a schematic diagram of the reverse locking card structure in the present invention.

[0043] In the figure: 1-furnace trough, 2-insulating pad, 3-gantry, 4-silo, 5-busbar seat, 6-busbar, 7-mounting plate, 8-anode lifting assembly, 9-anode fixing plate, 10-small box fixture, 11-anode, 12-side guard plate, 13-style plate, 81-dual output shaft motor, 82-transmission shaft, 83-bevel gear assembly, 84-outer casing, 85-screw, 86-lifting screw barrel, 87-slide rail, 88-slide seat, 89-fixed seat, 810-connecting cross bar, 811-rotating card, 812-connecting rod, 813-rotating shaft, 814-fixed column;

[0044] 101-furnace body, 102-insulation bricks, 103-cathode. DETAILED DESCRIPTION

[0045] See also Figure 1-10 A silicon-iron alloy reactor, taking the production of cookware as an example, comprises a furnace tank 1, insulating pads 2 are arranged at both ends of the furnace tank 1, two insulating pads 2 are fixedly connected with gantry frames 3 by bolts, and a silo 4 is fixedly installed between the two gantry frames 3; a mounting plate 7 is arranged on one side of the silo 4, and an anode lifting assembly 8 is installed on the outer side of the mounting plate 7;

[0046] The anode lifting assembly 8 includes a dual-output shaft motor 81, which is fixed at the middle position of the top of one side of the silo 4 through a motor mounting base. The two output shafts of the dual-output shaft motor 81 are connected to a transmission shaft 82 through a coupling. A bevel gear assembly 83 is installed at the end of each transmission shaft 82 and is arranged inside an outer protective shell 84. A screw 85 is also installed on the bevel gear assembly 83, and the lower end of the screw 85 is threadedly connected to the lifting screw barrel 86; two connecting cross bars 810 are welded between the two lifting screw barrels 86.

[0047] In this embodiment, the bevel gear assembly 83 includes two 45-degree bevel gears that are vertically meshed, one of which is connected to the transmission shaft 82, and the other is installed on the screw 85, and the top of the screw 85 is connected to the outer shell 84 through a bearing; the outer shell 84 is welded and fixed to the mounting plate 7 through a bracket.

[0048] In this embodiment, a sliding seat 88 is welded on the lifting screw barrel 86, and the sliding seat 88 is slidably connected to the sliding rail 87; the sliding rail 87 is welded on the mounting plate 7; a fixed seat 89 is also arranged below the sliding rail 87, and a guide hole is opened on the fixed seat 89 for facilitating the lifting screw barrel 86 to pass through.

[0049] By adopting the above technical solution, the dual-output shaft motor 81 drives the bevel gear assembly 83 to rotate through the transmission shaft 82, and the two screws 85 rotate under the drive of the bevel gear assembly 83. At this time, the lifting screw barrel 86 converts the rotational motion of the screw 85 into linear motion, and slides upward along the slide rail 87 through the slide seat 88. The connecting cross bar 810 lifts all the anodes 11 upward through the cooperation of the anode fixing plate 9 and the small box clamp 10, thereby realizing the lifting of the anode.

[0050] In this embodiment, a reverse locking card is provided on the outer side of the slide 88, and the reverse locking card includes a rotating card 811, which is movably connected to the rotating shaft 813, and a U-shaped groove is opened on the side of the rotating card 811 away from the slide 88, and a connecting rod 812 is connected in the U-shaped groove through a pin shaft.

[0051] More specifically, the rotating clamp 811 has a plane at the bottom, and a fixing column 814 is provided below the plane, and the fixing column 814 is welded to the mounting plate 7 .

[0052] By adopting the above technical solution, the slide 88 will push the rotating clamp 811 to flip upward when it rises, and then when the slide 88 moves above the rotating clamp 811, the rotating clamp 811 flips back again and stays on the fixed column 814. At this time, the rotating clamp 811 has a blocking and resisting effect on the slide 88 to bear the falling force of the anode 11.

[0053] In this embodiment, the side of the silo 4 away from the mounting plate 7 is fixedly connected to the busbar seat 5 by bolts; a plurality of busbars 6 are welded to the outer side of the busbar seat 5, and an anode fixing plate 9 is fixedly installed on the outer side of the two connecting cross bars 810, and a small box fixture 10 is fixedly connected to the outer side of the anode fixing plate 9 by bolts; an anode 11 is fixed to each of the small box fixtures 10.

[0054] By adopting the above technical solution, when the carbon blocks on the anode 11 are consumed, the anode 11 is fixed by the hook of the overhead crane, and then the bolts on the small box fixture 10 are loosened, and the anode 11 is lifted out and then replaced with a new anode.

[0055] In this embodiment, side guard plates 12 are fixed to the outer sides of the two gantries 3; four side guard plates 12 are provided, two of which form a group, and a horizontal plate is provided between each group of side guard plates 12; style plates 13 are provided on both sides of the furnace trough 1.

[0056] In this embodiment, the furnace tank 1 comprises a furnace body 101 , the interior of the furnace body 101 is paved with insulation bricks 102 , and a cathode 103 is arranged above the insulation bricks 102 .

[0057] A method for using a ferrosilicon alloy reactor comprises the following steps:

[0058] Step 1: Start the reactor. Lay a layer of furnace charge with a thickness of 15-20 cm in the furnace tank 1. Then lay silicon carbide powder and silicon monoxide powder on top of the furnace charge with a thickness of 30-50 cm. Then, place the furnace charge on the silicon carbide powder and silicon monoxide powder. Then, energize the anode 11 and the cathode 103. Cover the outer side of the side guard plate 12 with a tank cover to insulate the reactor.

[0059] Step 2: After electricity is passed between the cathode 103 and the anode 11, the charge, silicon carbide powder and silicon monoxide powder are conductors between the positive and negative electrodes and a short circuit occurs. The charge, silicon carbide powder and silicon monoxide powder are electrolyzed as the furnace temperature increases. When the furnace temperature is greater than 2100°C, the silicon carbide powder and silicon monoxide powder begin to react and form a melt, and the silicon monoxide that does not participate in the reaction is oxidized into silicon dioxide in the atmosphere;

[0060] Step 3: Add iron into the furnace. The reduction reaction of silicon dioxide is:

[0061] SiO2+2C+nFe=

Si

[0062] Iron can also destroy the intermediate products of the silicon dioxide reduction process, Fe+nSiC=FeSin +nC; moves the reaction toward the production direction. The reaction starts at 1120℃ and becomes intense at 1200-1300℃, producing graphite and ferrosilicon.

[0063] Step 4: The anode 11 is lifted. The carbon block at the bottom of the anode is lost due to the erosion of the solution. Therefore, the anode needs to be lifted upward. When lifting the anode, the dual-output shaft motor 81 drives the bevel gear assembly 83 to rotate through the transmission shaft 82. The two screws 85 rotate under the drive of the bevel gear assembly 83. At this time, the lifting screw barrel 86 converts the rotational motion of the screw 85 into linear motion, and slides upward along the slide rail 87 through the slide seat 88. The connecting cross bar 810 lifts all the anodes 11 upward through the cooperation of the anode fixing plate 9 and the small box fixture 10, thereby realizing the lifting of the anode;

[0064] When the slide 88 rises, it pushes the rotating clamp 811 to flip upward, and then when the slide 88 moves to the top of the rotating clamp 811, the rotating clamp 811 flips back again and stays on the fixed column 814. At this time, the rotating clamp 811 plays a blocking and resisting role for the slide 88 to bear the falling force of the anode 11.

[0065] Step 5: Anode replacement. When the carbon blocks on the anode 11 are consumed, use the hook of the overhead crane to fix the anode 11, then loosen the bolts on the small box fixture 10, lift out the anode 11, and then replace it with a new anode.

[0066] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A silicon-iron alloy reactor, characterized in that: It comprises a furnace trough (1), wherein both ends of the furnace trough (1) are provided with insulating pads (2), two insulating pads (2) are fixedly connected to a gantry (3) by bolts, and a silo (4) is fixedly installed between the two gantry (3); a mounting plate (7) is provided on one side of the silo (4), and an anode lifting assembly (8) is installed on the outer side of the mounting plate (7); The anode lifting assembly (8) comprises a dual-output shaft motor (81), the dual-output shaft motor (81) being fixed at the middle position of the top of one side of the silo (4) via a motor mounting seat, the two output shafts of the dual-output shaft motor (81) being connected to a transmission shaft (82) via a coupling, the end of each transmission shaft (82) being matched with a bevel gear assembly (83) being mounted inside an outer protective shell (84), and a screw rod (85) being matched with the bevel gear assembly (83), the lower end of which is threadedly connected to a lifting screw barrel (86); two connecting cross bars (810) are welded between the two lifting screw barrels (86); A slide seat (88) is welded to the lifting screw barrel (86); the slide seat (88) is slidably connected to the slide rail (87); the slide rail (87) is welded to the mounting plate (7); a reverse locking card is arranged on the outer side of the slide seat (88), and the reverse locking card includes a rotating card (811), and the rotating card (811) is movably connected to the rotating shaft (813), and a U-shaped groove is opened on the side of the rotating card (811) away from the slide seat (88), and a connecting rod (812) is connected in the U-shaped groove through a pin shaft.

2. The ferrosilicon alloy reactor as claimed in claim 1, characterized in that: The bevel gear assembly (83) comprises two 45-degree bevel gears meshing vertically, wherein one bevel gear is connected to the transmission shaft (82), and the other bevel gear is mounted on the screw (85), and the top of the screw (85) is connected to the outer protective shell (84) via a bearing; the outer protective shell (84) is fixed by welding to the mounting plate (7) via a bracket.

3. The ferrosilicon alloy reactor as claimed in claim 2, characterized in that: A fixing seat (89) is also provided below the slide rail (87), and a guide hole is provided on the fixing seat (89) for the lifting screw barrel (86) to pass through.

4. The ferrosilicon alloy reactor as claimed in claim 3, characterized in that: An anode fixing plate (9) is fixedly mounted on the outer sides of the two connecting cross bars (810), and a small box fixture (10) is fixedly connected to the outer side of the anode fixing plate (9) via bolts; an anode (11) is fixed to each of the small box fixtures (10).

5. The ferrosilicon alloy reactor as claimed in claim 1, characterized in that: The bottom of the rotating clamp (811) has a plane, and a fixing column (814) is provided below the plane. The fixing column (814) is welded to the mounting plate (7).

6. The ferrosilicon alloy reactor as claimed in claim 1, characterized in that: A busbar seat (5) is fixedly connected to the side of the silo (4) away from the mounting plate (7) by means of bolts; a plurality of busbars (6) are welded to the outer side of the busbar seat (5).

7. The ferrosilicon alloy reactor as claimed in claim 1, characterized in that: Side guard plates (12) are fixed to the outer sides of the two gantries (3); four side guard plates (12) are provided, two of which form a group, and a horizontal plate is provided between each group of side guard plates (12); style plates (13) are provided on both sides of the furnace trough (1).

8. The ferrosilicon alloy reactor as claimed in claim 1, characterized in that: The furnace tank (1) comprises a furnace body (101), the interior of the furnace body (101) is paved with insulation bricks (102), and a cathode (103) is arranged above the insulation bricks (102).

9. A method for using the ferrosilicon alloy reactor according to claim 1, characterized in that: The steps include: Step 1: Start the reactor. Lay a layer of furnace charge with a thickness of 15-20 cm in the furnace tank (1). Then lay silicon carbide powder and silicon monoxide powder on top of the furnace charge to a thickness of 30-50 cm. Then, pile the furnace charge on the silicon carbide powder and silicon monoxide powder. Then, energize the anode (11) and the cathode (103). Cover the outer side of the side guard plate (12) with a tank cover to insulate the reactor. Step 2: After electricity is passed between the cathode (103) and the anode (11), the charge, silicon carbide powder and silicon monoxide powder serve as conductors between the positive and negative electrodes and a short circuit occurs. The charge, silicon carbide powder and silicon monoxide powder are electrolyzed as the furnace temperature rises. When the furnace temperature is greater than 2100° C., the silicon carbide powder and silicon monoxide powder begin to react and form a melt, and the silicon monoxide that does not participate in the reaction is oxidized into silicon dioxide in the atmosphere; Step 3: Add iron into the furnace. The reduction reaction of silicon dioxide is: ； Iron can also destroy the intermediate products of the silica reduction process. ; Move the reaction towards the production direction. The reaction starts at 1120℃ and becomes intense at 1200-1300℃, producing graphite and ferrosilicon. Step 4: The anode (11) is lifted. The carbon block at the bottom of the anode is lost due to the erosion of the solution. Therefore, the anode needs to be lifted upward. When lifting the anode, the dual output shaft motor (81) drives the bevel gear assembly (83) to rotate through the transmission shaft (82). The two screws (85) rotate under the drive of the bevel gear assembly (83). At this time, the lifting screw barrel (86) converts the rotational motion of the screw (85) into linear motion, and slides upward along the slide rail (87) through the slide seat (88). The connecting cross bar (810) lifts all the anodes (11) upward through the cooperation of the anode fixing plate (9) and the small box fixture (10), thereby realizing the lifting of the anode; When the slide (88) rises, it pushes the rotating clamp (811) to flip upwards. Then, when the slide (88) moves to above the rotating clamp (811), the rotating clamp (811) flips back again and stays on the fixed column (814). At this time, the rotating clamp (811) has a blocking and resisting effect on the slide (88) to bear the falling force of the anode (11). Step 5: Anode replacement. When the carbon block on the anode (11) is consumed, the anode (11) is fixed by the hook of the overhead crane, and then the bolts on the small box fixture (10) are loosened, and the anode (11) is lifted out, and then replaced with a new anode.

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