Efficient silicon-manganese alloy smelting method and smelting device thereof

Abstract

According to the efficient smelting method and device for the silicon-manganese alloy, the manganese ore and the silica are crushed into proper particle sizes, the contact area between the raw materials is increased, the reaction speed is increased, the raw materials are fully reacted in the furnace, the proportion of the raw materials is adjusted, the reaction is more sufficient, and the qualified rate of products is increased; during smelting, a high-precision sensor is used for monitoring parameters such as temperature, pressure, current and voltage in the furnace in real time, a distributed control system is used for automatically adjusting smelting process variables such as electrode lifting, power supply power and raw material feeding speed according to the parameters monitored in real time, and it is ensured that reaction in the furnace is conducted in the optimal state; smelting hot air is filtered through the filter box and then discharged into the mixing box through the centrifugal suction pump, raw materials are scooped up and fall down while mechanical mixing is conducted, the sufficient mixing and preheating effect is guaranteed in cooperation with hot air introduction, and finally the effects of improving the heat source utilization rate, sufficiently mixing and preheating and efficiently smelting are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy smelting, and in particular to a high-efficiency smelting method and a smelting device for a silicon-manganese alloy. Background Art

[0002] The electric submerged arc furnace is one of the main equipment for smelting silicon-manganese alloy. The traditional silicon-manganese alloy smelting method has some problems, such as high energy consumption, low thermal efficiency, and environmental pollution. The flue gas temperature of the electric submerged arc furnace is high and contains a large amount of waste heat resources, but the current waste heat utilization efficiency is low, resulting in energy waste. Against the background of increasing global attention to energy conservation, emission reduction and environmental protection, the development of efficient, energy-saving and environmentally friendly silicon-manganese alloy smelting methods to reduce energy consumption and pollutant emissions has become an inevitable requirement for the development of the industry.

[0003] The existing Chinese patent application number CN201911245556.6 discloses an efficient smelting method for silicon-manganese alloy. A pre-batch made of water-washed slag, silicon-manganese alloy slag, smelting dust generated after smelting flue gas dust removal, and alumina is added to a submerged arc furnace together with raw materials such as manganese ore for smelting. On the one hand, it effectively treats part of the waste slag generated during the smelting process of the silicon-manganese alloy. On the other hand, the dried water-washed slag and silicon-manganese alloy slag are beneficial to improving the thermodynamic conditions of the submerged arc furnace during the smelting process and improving the smelting efficiency. The water-washed slag and smelting dust contain a large amount of calcium oxide and magnesium oxide, which can meet the alkalinity regulation needs in the submerged arc furnace. The dried water-washed slag, silicon-manganese alloy slag and smelting dust contain a large amount of silicon and manganese. After re-refining, the recovery rate of silicon and manganese can be significantly improved. However, in this method, the material enters the submerged arc furnace in a cold state during the smelting process, resulting in high heat consumption, consuming a large amount of electricity, and causing high energy loss. At the same time, the uneven distribution of the ore raw materials leads to incomplete or excessive local reactions, affecting the final smelting effect.

[0004] In view of the above problems, a high-efficiency smelting method and smelting device of silicon-manganese alloy are proposed to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and propose an efficient smelting method and smelting device for silicon manganese alloy. The use of this device solves the problems of high heat consumption during smelting, inconvenience in fully mixing raw materials and preheating.

[0006] To solve the above problems, the technical solution adopted by the present invention is: a high-efficiency smelting method of silicon-manganese alloy, comprising the following steps: S1: Manganese ore, silica and coke are crushed in turn by a crusher and then screened by a vibrating screen; S2: Accurately calculate the ratio of manganese ore, silica and coke through the principle of stoichiometry, and realize the ratio of crushed and screened raw materials according to the target composition of silicon-manganese alloy; S3: Use air flow stirring and mixing equipment to fully preheat and mix the well-proportioned raw materials, so that raw materials of different particle sizes and compositions form a uniform mixture to avoid uneven local reactions during smelting; S4: Add the homogenized raw materials into the smelting furnace, install graphite electrodes and adjust the insertion depth, heat the charge through the electrodes, and use thermocouple sensors, pressure sensors, and current transformers to monitor the temperature, pressure, current, and voltage parameters in the furnace in real time; S5: Utilize the distributed control system to collect real-time data on temperature and current in the furnace. When the temperature deviates from the predetermined range, the system automatically adjusts the electrode lifting, power supply, and raw material feeding speed to ensure that the reaction in the furnace proceeds in the best condition.

[0007] Furthermore, the particle size range of manganese ore in S1 is 10-40 mm, the particle size range of silica is 10-30 mm, and the particle size range of coke is 5-15 mm.

[0008] The present invention also provides a smelting device for silicon-manganese alloy, wherein in S4, the smelting electric furnace includes a smelting furnace, and in S3, the airflow stirring and mixing device includes a mixing barrel, which is arranged above the smelting furnace and is internally connected, a gas pipeline connected to the interior of the smelting furnace is fixedly connected to the outside of the smelting furnace, a filter box is fixedly connected to one side of the gas pipeline, a centrifugal air pump is arranged above the filter box, an input end of the centrifugal air pump is connected to the filter box through the gas pipeline, an output end of the centrifugal air pump is fixedly connected to a gas branch pipe, the gas branch pipe is connected to the interior of the smelting furnace, and a mixing mechanism for mixing raw materials is arranged inside the mixing barrel; The mixing mechanism includes a motor A arranged inside a mixing barrel, the output end of the motor A is fixedly connected to an output shaft A, the bottom end of the output shaft A is fixedly connected to a stirring rod, the outside of the stirring rod is fixedly connected to a mixing plate, the inner wall of the mixing barrel is fixedly connected to a sleeve, the bottom surface of the sleeve is fixedly connected to a reciprocating screw rod A, the reciprocating screw rod A is a hollow structure, the output shaft A passes through the inside of the reciprocating screw rod A, the bottom surface of the reciprocating screw rod A is fixedly connected to a chassis, the outside of the sleeve is rotatably connected to a rotating ring, the outside of the rotating ring is fixedly connected to a support plate, a guide plate is fixedly connected between the support plate and the mixing plate, the outside of the reciprocating screw rod A is threadedly connected to a lifting ring, the outside of the lifting ring is fixedly connected to a lifting plate, the lifting plate is sleeved on the outside of the guide plate, the bottom surface of the lifting plate is fixedly connected to a vertical plate, the bottom surface of the vertical plate is fixedly connected to a lifting block, one side of the lifting block is fixedly connected to a side frame, and a shoveling component for shoveling material is provided inside the side frame.

[0009] Furthermore, the shoveling component includes a connecting short rod rotatably connected to the inner wall of the side frame, a flip plate is fixedly connected to the outside of the connecting short rod, the flip plate is arranged inside the side frame, a torsion spring A is provided at the connection between the connecting short rod and the inner wall of the side frame, a bucket is fixedly connected to one side of the flip plate, there are two groups of side frames, the two groups of side frames are symmetrically arranged on both sides of the lifting block, an inclined groove is provided on the upper surface of the mixing plate, the inclined groove is arranged corresponding to the shoveling component, and a valve is provided on the bottom surface of the mixing barrel.

[0010] Furthermore, a locking convex plate is provided on one side of the flip plate, a compression groove is provided on one side of the flip plate, a compression spring is provided inside the compression groove, one end of the compression spring is fixedly connected to the locking convex plate, a card slot is provided on the inner wall of the side frame, an oblique block is slidably connected inside the card slot, an inner groove is provided on the inner wall of the card slot, a limiting block is fixedly connected to the bottom surface of the oblique block, a spring A is fixedly connected between the limiting block and the inner wall of the inner groove, an unlocking plate is fixedly connected to one side of the guide plate, an unlocking groove is provided on the upper surface of the side frame, the unlocking plate and the unlocking groove are correspondingly arranged, and the bottom end of the unlocking plate is correspondingly arranged to the inclined end of the oblique block.

[0011] Furthermore, a heating ring A is fixedly connected to the inner wall of the mixing barrel, and a heating ring B is rotatably connected to the inner wall of the mixing barrel. The heating ring A is arranged above the heating ring B and both are connected to the gas branch pipe. An air outlet is provided on the bottom surface of the heating ring A. One end of the mixing plate is fixedly connected to the inner wall of the heating ring B. An air storage ring groove is provided on one side of the heating ring B. The air storage ring groove is connected to the inside of the mixing plate and the inside of the guide plate. A one-way pressure valve B is provided on the outside of the mixing plate, and a one-way pressure valve A is provided on the outside of the guide plate.

[0012] Furthermore, a screw conveyor is fixedly connected to one side of the mixing barrel, a feed port is opened on the outside of the mixing barrel, the screw conveyor is connected to the inside of the mixing barrel through the feed port, a stand is provided on one side of the mixing barrel, a screening box is provided above the stand, a screen A is provided on the inner wall of the screening box, a baffle plate is fixedly connected to the inner wall of the screening box, a screening component is provided below the baffle plate, a collecting hopper is fixedly connected to the bottom surface of the screening box, a proportioning box is provided on the bottom surface of the collecting hopper, and the proportioning box is provided corresponding to the screw conveyor.

[0013] Furthermore, the screening component includes a motor B arranged on one side of the screening box, the output end of the motor B is fixedly connected to the reciprocating screw B, and a discharge assembly is arranged on the outside of the reciprocating screw B. The discharge assembly includes a telescopic plate threadedly connected to the outside of the reciprocating screw B, the telescopic plate is slidably connected to the inside of the baffle plate, the bottom surface of the telescopic plate is fixedly connected to a cross frame, the inside of the cross frame is rotatably connected to a long rod, the outside of the long rod is fixedly connected to the discharge plate, and a discharge box is arranged on one side of the screening box.

[0014] Furthermore, a torsion spring B is provided at the connection between the long rod and the inner wall of the horizontal frame, and a leakage groove is provided on the bottom surface of the discharge plate.

[0015] Furthermore, the inner cavity of the discharge box is arranged to be inclined downward, and the receiving collecting box is located outside the discharge box. The bottom surface of the inner wall of the discharge box is fixedly connected to the screen B, and the bottom surface of the screen B is fixedly connected to the feed box. The bottom end of the feed box is connected to the inside of the screening box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes an efficient smelting method and smelting device for silicon-manganese alloy. By crushing manganese ore and silica into suitable particle sizes, the contact area between the raw materials is increased, the reaction speed is accelerated during the smelting process, the raw materials can react better in the furnace, the proportion of the raw materials is adjusted, the reaction is more sufficient, and the qualified rate of the product is improved. During smelting, high-precision sensors are used to monitor the temperature, pressure, current, voltage and other parameters in the furnace in real time. A distributed control system is used to automatically adjust the smelting process variables such as electrode lifting, power supply power, and raw material feeding speed according to the real-time monitored parameters to ensure that the reaction in the furnace is carried out under the optimal state. During the smelting process, the smelting hot gas is filtered through a filter box and then discharged into a mixing box through a centrifugal vacuum pump. While mechanically mixing, the raw materials are scooped up and dropped, and the hot gas is introduced to ensure sufficient mixing and preheating effects, ultimately achieving the effects of improving heat source utilization, sufficient mixing and preheating, and efficient smelting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them: Figure 1 A schematic diagram of a process flow of a high-efficiency smelting method for silicon-manganese alloy according to one embodiment of the present invention is shown; Figure 2 Schematically shows an overall structural diagram proposed according to one embodiment of the present invention; Figure 3 Schematically shows a schematic structural diagram of a mixing barrel proposed according to one embodiment of the present invention; Figure 4 Schematically shows a structural diagram of a hybrid mechanism proposed according to one embodiment of the present invention; Figure 5 Schematically shows a schematic diagram of the structure of a mixing plate proposed according to one embodiment of the present invention; Figure 6 Schematically shows a schematic structural diagram of a heating ring B proposed according to one embodiment of the present invention; Figure 7 A schematic diagram of the structure of a lifting block proposed according to one embodiment of the present invention is shown; Figure 8 Schematically shows a schematic structural diagram of a shoveling component proposed according to one embodiment of the present invention; Figure 9 A schematic diagram of the internal structure of a side frame according to one embodiment of the present invention is shown; Figure 10 Schematically shows a schematic diagram of the bucket structure extension proposed according to one embodiment of the present invention; Figure 11 Schematically showing a structural diagram A of components inside a screening box according to one embodiment of the present invention; Figure 12 Schematically showing a structural diagram B of a screening component proposed according to one embodiment of the present invention; Figure 13 Schematically shows a schematic structural diagram of a discharge assembly proposed according to one embodiment of the present invention; Figure 14 The figure schematically shows the structure of the discharge box according to one embodiment of the present invention.

[0018] Numbers in the figure: 1. Smelting furnace; 11. Gas pipeline; 12. Filter box; 13. Centrifugal vacuum pump; 14. Gas branch pipe; 2. Mixing barrel; 21. Feed inlet; 22. Mixing mechanism; 221. Motor A; 222. Output shaft A; 223. Reciprocating screw A; 224. Lifting ring; 225. Lifting plate; 226. Vertical plate; 227. Stirring rod; 23. Heating ring A; 24. Heating ring B; 241. Gas storage ring groove; 25. Casing; 251. Rotating ring; 252. Support plate; 253. Guide plate; 254. One-way pressure valve A; 255. Unlocking plate; 26. Mixing plate; 261. One-way pressure valve B; 262. Chute; 27. Shovel Parts; 271. Flip plate; 272. Bucket; 273. Connecting short rod; 274. Torsion spring A; 275. Locking cam; 28. Lifting block; 281. Side frame; 282. Unlocking slot; 283. Card slot; 284. Oblique block; 285. Inner slot; 286. Limit block; 287. Spring A; 3. Screening box; 31. Baffle plate; 32. Screen A; 33. Screening parts; 331. Motor B; 332. Reciprocating screw B; 34. Aggregate hopper; 35. Discharge box; 351. Screen B; 352. Feed box; 36. Discharge assembly; 361. Telescopic plate; 362. Cross frame; 363. Long rod; 364. Discharge plate; 4. Screw conveyor. DETAILED DESCRIPTION

[0019] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0020] According to one embodiment of the present invention, Figure 1 , a method for efficiently smelting silicon-manganese alloy, comprising the following steps: S1: Manganese ore, silica and coke are crushed in turn by a crusher and then screened by a vibrating screen; S2: Accurately calculate the ratio of manganese ore, silica and coke through the principle of stoichiometry, and realize the ratio of crushed and screened raw materials according to the target composition of silicon-manganese alloy; S3: Use air flow stirring and mixing equipment to fully preheat and mix the well-proportioned raw materials, so that raw materials of different particle sizes and compositions form a uniform mixture to avoid local uneven reactions during smelting; S4: Add the homogenized raw materials into the smelting furnace, install graphite electrodes and adjust the insertion depth, heat the charge through the electrodes, and use thermocouple sensors, pressure sensors, and current transformers to monitor the temperature, pressure, current, and voltage parameters in the furnace in real time; S5: Utilizes a distributed control system to collect data on temperature and current in the furnace in real time. When the temperature deviates from the predetermined range, it automatically adjusts the electrode lifting, power supply, and raw material feeding speed to ensure that the reaction in the furnace proceeds under optimal conditions. The ratio of manganese ore, silica, and coke is as follows: 2000-2500 parts of manganese ore, 100-160 parts of silica ore, and 300-450 parts of coke. During smelting, Φ700mm electrodes are used, 600-800mm submerged arcs are inserted, the temperature is controlled at 1680-1750℃, the current is 24-30kA, and the slag basicity is 0.9-1.0. By integrating a high-precision sensor network such as thermocouples and pressure sensors, key parameters such as temperature, pressure, current, and gas composition in the smelting furnace are collected in real time to build a dynamic data monitoring system. Relying on a distributed control system (DCS), the data is intelligently analyzed and multi-dimensional precise control is performed simultaneously. Thermodynamic equilibrium is achieved through electrode lifting and power adjustment, and the furnace temperature fluctuation is controlled within a process window of ±15℃. Dynamic optimization of enrichment is based on gas chromatography analysis. The oxygen concentration of the oxygen blast, with an adjustable flow rate range of 50-80 m³ / min, stabilizes the CO / CO2 ratio within the reaction equilibrium range of 0.8-1.2. Combined with spectral detection of raw material composition, the PID algorithm is used to adjust the material feed rate in real time with an accuracy of ±5%, forming a "monitoring-decision-execution" closed-loop control. This system reduces power consumption in silicon-manganese alloy smelting by 12%, increases the Mn recovery rate to 92.5%, and achieves millisecond-level control with a process parameter deviation warning response time of less than 3 seconds, saving 12% of electricity compared to traditional processes. The alloy's Mn content is stabilized at 68.7±0.2%.

[0021] The particle size range of S1 manganese ore is 10-40mm, the particle size range of silica is 10-30mm, and the particle size range of coke is 5-15mm.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] See also Figure 2-Figure 14 , the technical solution also provides a smelting device for silicon-manganese alloy. In the above method S4, the smelting electric furnace includes a smelting furnace 1, and the airflow stirring and mixing device in S3 includes a mixing drum 2. The mixing drum 2 is arranged above the smelting furnace 1 and is internally connected. The outside of the smelting furnace 1 is fixedly connected to a gas pipeline 11 connected to the inside of the smelting furnace 1. A filter box 12 is fixedly connected to one side of the gas pipeline 11. A centrifugal air pump 13 is arranged above the filter box 12. The input end of the centrifugal air pump 13 is connected to the filter box 12 through the gas pipeline 11. The output end of the centrifugal air pump 13 is fixedly connected to a gas branch pipe 14. The gas branch pipe 14 is connected to the inside of the smelting furnace 1. A mixing mechanism 22 for mixing raw materials is provided inside the mixing drum 2; The mixing mechanism 22 includes a motor A221 arranged inside the mixing barrel 2, the output end of the motor A221 is fixedly connected to the output shaft A222, the bottom end of the output shaft A222 is fixedly connected to the stirring rod 227, the outer side of the stirring rod 227 is fixedly connected to the mixing plate 26, the inner wall of the mixing barrel 2 is fixedly connected to the sleeve 25, the bottom surface of the sleeve 25 is fixedly connected to the reciprocating screw rod A223, the reciprocating screw rod A223 is a hollow structure, the output shaft A222 passes through the reciprocating screw rod A223, and the reciprocating screw rod The bottom surface of A223 is fixedly connected to the chassis, the outer side of the sleeve 25 is rotatably connected to the rotating ring 251, the outer side of the rotating ring 251 is fixedly connected to the support plate 252, the support plate 252 and the mixing plate 26 are fixedly connected with the guide plate 253, the outer side of the reciprocating screw A223 is threadedly connected to the lifting ring 224, the outer side of the lifting ring 224 is fixedly connected to the lifting plate 225, the lifting plate 225 is sleeved on the outer side of the guide plate 253, the bottom surface of the lifting plate 225 is fixedly connected to the vertical plate 226, the vertical plate 226 The bottom surface is fixedly connected to a lifting block 28, and one side of the lifting block 28 is fixedly connected to a side frame 281. A shoveling component 27 for shoveling materials is provided inside the side frame 281. During the smelting process, the hot gas from the smelting is transported to the filter box 12 through the gas pipeline 11. After being filtered by the filter box 12, the gas is extracted by the centrifugal suction pump 13 and discharged into the mixing barrel 2 in conjunction with the gas branch pipe 14 and the gas pipeline 11, preheating the raw materials inside the mixing barrel 2. While preheating, the raw materials are mixed and the motor A22 is turned on. 1 drives the output shaft A222, the reciprocating screw rod A223 and the stirring rod 227 to rotate, and uses the mixing plate 26 to stir and mix the raw materials from the bottom. At the same time, the lifting ring 224 and the lifting plate 225 are driven to rotate during stirring. Under the guidance of the outer thread of the reciprocating screw rod A223, the lifting plate 225, the vertical plate 226, the lifting block 28, the side frame 281 and the shoveling component 27 are driven to move back and forth up and down. During the movement, the shoveling component 27 is used to shovel the materials, thereby promoting the mixing and preheating effect.

[0024] The shoveling component 27 includes a connecting short rod 273 rotatably connected to the inner wall of the side frame 281, a flip plate 271 is fixedly connected to the outer side of the connecting short rod 273, and the flip plate 271 is arranged inside the side frame 281. A torsion spring A274 is provided at the connection between the connecting short rod 273 and the inner wall of the side frame 281. A bucket 272 is fixedly connected to one side of the flip plate 271. There are two groups of side frames 281, and the two groups of side frames 281 are symmetrically arranged on both sides of the lifting block 28. The upper surface of the mixing plate 26 is provided with an inclined groove 262, and the inclined groove 262 is arranged corresponding to the shoveling component 27. A valve is provided on the bottom surface of the mixing barrel 2. When the bucket 272 does not contact the ore raw material, as shown in FIG. Figure 10 As shown above, under the action of the connecting short rod 273, the bucket 272 is tilted downward and retracted toward the middle. As the side frame 281 moves downward, the bucket 272 is inserted into the ore material until it contacts the chute 262. Under the guidance of the chute 262, the bucket 272 tends to Figure 10 In the state shown below, when the subsequent side frame 281 moves upward, the bucket 272 is used to scoop up the raw materials to promote mixing and preheating.

[0025] A locking convex plate 275 is provided on one side of the flip plate 271, and a compression groove is provided on one side of the flip plate 271. A compression spring is provided inside the compression groove, and one end of the compression spring is fixedly connected to the locking convex plate 275. A slot 283 is provided on the inner wall of the side frame 281. An oblique block 284 is slidably connected inside the slot 283. An inner groove 285 is provided on the inner wall of the slot 283. A limit block 286 is fixedly connected to the bottom surface of the oblique block 284. A spring A287 is fixedly connected between the limit block 286 and the inner wall of the inner groove 285. An unlocking plate 255 is fixedly connected to one side of the guide plate 253. An unlocking groove 282 is provided on the upper surface of the side frame 281. The unlocking plate 255 is corresponding to the unlocking groove 282. The bottom end of the unlocking plate 255 is corresponding to the inclined end of the oblique block 284. When the bucket 272 rotates to Figure 10 When in the downward state, the locking cam 275 bounces into the slot 283 under the action of the compression spring. During the upward movement of the side frame 281, the internal material is turned over and the material inside the bucket 272 gradually slides down, increasing the contact area with the air. When the side frame 281 gradually moves toward the unlocking plate 255, the unlocking plate 255 is inserted into the unlocking slot 282 and squeezes the oblique block 284, driving the oblique block 284 to move toward the locking cam 275, thereby squeezing the locking cam 275 out of the slot 283, and the bucket 272 is reset under the action of the torsion spring A274. After the unlocking plate 255 is separated from the unlocking slot 282, the oblique block 284 is reset under the action of the spring A287.

[0026] The inner wall of the mixing barrel 2 is fixedly connected to a heating ring A23, and the inner wall of the mixing barrel 2 is rotatably connected to a heating ring B24. The heating ring A23 is arranged above the heating ring B24 and is connected to the gas branch pipe 14. The bottom surface of the heating ring A23 is provided with an air outlet. One end of the mixing plate 26 is fixedly connected to the inner wall of the heating ring B24. An air storage ring groove 241 is provided on one side of the heating ring B24. The air storage ring groove 241 is connected to the inside of the mixing plate 26 and the inside of the guide plate 253. A one-way pressure valve B261 is provided on the outside of the mixing plate 26. A one-way pressure valve A254 is provided on the outside of the guide plate 253. The hot gas from smelting is discharged into the heating ring A23 and the heating ring B24 through the gas branch pipe 14. The hot gas can be directly discharged into the heating ring A23 through the gas outlet on the bottom of the heating ring A23 for heating. The heating ring B24 continues to heat up under the action of hot gas transmission and can be in direct contact with the raw materials for heating. The hot air is also discharged from the one-way pressure valve B261 and the one-way pressure valve A254 through the mixing plate 26 and the guide plate 253, and the raw materials are fully preheated in conjunction with the shoveling movement.

[0027] A screw conveyor 4 is fixedly connected to one side of the mixing barrel 2, and a feed port 21 is provided on the outside of the mixing barrel 2. The screw conveyor 4 is connected to the inside of the mixing barrel 2 through the feed port 21. A stand is provided on one side of the mixing barrel 2, and a screening box 3 is provided above the stand. A screen A32 is provided on the inner wall of the screening box 3, and a baffle plate 31 is fixedly connected to the inner wall of the screening box 3. A screening component 33 is provided below the baffle plate 31. A collecting hopper 34 is fixedly connected to the bottom surface of the screening box 3, and a proportioning box is provided on the bottom surface of the collecting hopper 34. The proportioning box and the screw conveyor 4 are arranged correspondingly. After the raw materials are added into the screening box 3, the particle size of the raw materials is screened by the screen A32. After the proportioning is completed under the guidance of the collecting hopper 34, the raw materials are discharged into the inside of the mixing barrel 2 through the screw conveyor 4.

[0028] The screening component 33 includes a motor B331 arranged on one side of the screening box 3, and the output end of the motor B331 is fixedly connected to the reciprocating screw rod B332, and a discharge assembly 36 is arranged on the outside of the reciprocating screw rod B332. The discharge assembly 36 includes a telescopic plate 361 threadedly connected to the outside of the reciprocating screw rod B332, and the telescopic plate 361 is slidably connected to the inside of the baffle plate 31. The bottom surface of the telescopic plate 361 is fixedly connected to the cross frame 362, and the long rod 363 is rotatably connected inside the cross frame 362. The outside of the long rod 363 is fixedly connected to the discharge plate 364. A discharge box 35 is provided on one side of the screening box 3.

[0029] A torsion spring B is provided at the connection between the long rod 363 and the inner wall of the cross frame 362, and a leakage groove is provided on the bottom surface of the discharge plate 364. Through the setting of the torsion spring B, when the material is pushed back, when encountering raw material particles that exceed the particle size range, the discharge plate 364 can be driven to flip over, and then the torsion spring B is used to reset after passing. The leakage groove is set to allow qualified particles to leak out of the leakage groove when discharging raw material particles that exceed the particle size range.

[0030] The inner cavity of the discharge box 35 is arranged to be inclined downward, and the discharge box 35 receives the collecting box outside. The bottom surface of the inner wall of the discharge box 35 is fixedly connected with a screen B351, and the bottom surface of the screen B351 is fixedly connected with a feed box 352. The bottom end of the feed box 352 is connected with the inside of the screening box 3. The raw material particles exceeding the particle size range are discharged into the collection box through the discharge box 35. A small amount of qualified raw material particles pass through the screen B351 and return to the screening box 3 from the feed box 352. The raw material particles exceeding the particle size range are re-crushed and then put back into the screening box 3.

[0031] In this embodiment, during the smelting process, the hot gas from the smelting is transported to the filter box 12 through the gas pipeline 11. After being filtered by the filter box 12, it is extracted by the centrifugal suction pump 13 and discharged into the heating ring A23 and the heating ring B24 through the gas branch pipe 14. The hot gas is directly discharged into the heating ring A23 through the gas outlet on the bottom surface of the heating ring A23 for heating. The heating ring B24 continues to heat up under the action of the hot gas transmission and can be in direct contact with the raw materials for heating. The hot air is also discharged from the one-way pressure valve B261 and the one-way pressure valve A254 through the mixing plate 26 and the guide plate 253 for preheating. While preheating, the raw materials are mixed. At this time, the motor A221 needs to be turned on to drive the output shaft A222, the reciprocating screw A223 and the stirring rod 227 to rotate. The mixing plate 26 is used to stir and mix the raw materials from the bottom. At the same time, the lifting ring 224 and the lifting plate 225 are driven to rotate during stirring. Under the guidance of the outer thread of the reciprocating screw A223, the lifting plate 225, the vertical plate 226, the lifting block 28 and the side frame 281 are driven to move up and down. When the bucket 272 does not contact the ore raw materials, the bucket 272 is tilted downward and retracted toward the middle under the action of the connecting short rod 273. As the side frame 281 moves downward, the bucket 272 is inserted into the ore raw materials until it contacts the chute 26. 2. Under the guidance of the chute 262, the bucket 272 is unfolded, and the locking convex plate 275 is retracted into the slot 283 by the action of the compression spring. When the side frame 281 moves upward, the bucket 272 is used to scoop up the raw materials, causing the internal raw materials to be turned over and gradually slide down the bucket 272, thereby increasing the contact area with the air and promoting mixing and preheating. Then, the unlocking plate 255 is inserted into the unlocking slot 282 and squeezes the oblique block 284, driving the oblique block 284 to move toward the locking convex plate 275, thereby squeezing the locking convex plate 275 out of the slot 283. The bucket 272 is reset by the action of the torsion spring A274. During the repeated stirring and lifting process, the raw materials are fully mixed and preheated. During the process of screening the raw material particle size, the motor B331 is turned on, and the reciprocating screw B332 is driven to rotate by the motor B331. Under the limiting action of the baffle plate 31, the telescopic plate 361 is driven to move horizontally along the direction of the reciprocating screw B332, and the discharge plate 364 is used to push the raw material particles that exceed the particle size range to the discharge box 35 and discharge them, which plays an auxiliary screening effect. The raw material particles that exceed the particle size range are discharged into the collection box through the discharge box 35, and a small amount of qualified raw material particles pass through the screen B351 from the feed box 352 and return to the screening box 3. The raw material particles that exceed the particle size range are re-crushed and put back into the screening box 3, ultimately achieving the purpose of improving the utilization rate of the heat source, fully mixing and preheating, and efficient smelting.

[0032] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A method for efficiently smelting silicon-manganese alloy, characterized by: The following steps are involved: S1: Manganese ore, silica and coke are crushed in turn by a crusher and then screened by a vibrating screen; S2: Accurately calculate the ratio of manganese ore, silica and coke through the principle of stoichiometry, and realize the ratio of crushed and screened raw materials according to the target composition of silicon-manganese alloy; S3: Use air flow stirring and mixing equipment to fully preheat and mix the well-proportioned raw materials, so that raw materials of different particle sizes and compositions form a uniform mixture to avoid uneven local reactions during smelting; S4: Add the homogenized raw materials into the smelting furnace, install graphite electrodes and adjust the insertion depth, heat the charge through the electrodes, and use thermocouple sensors, pressure sensors, and current transformers to monitor the temperature, pressure, current, and voltage parameters in the furnace in real time; S5: Utilize the distributed control system to collect real-time data on temperature and current in the furnace. When the temperature deviates from the predetermined range, the system automatically adjusts the electrode lifting, power supply, and raw material feeding speed to ensure that the reaction in the furnace proceeds in the best condition.

2. The high-efficiency smelting method of silicon-manganese alloy according to claim 1, characterized in that: The particle size of manganese ore in S1 is in the range of 10-40 mm, the particle size of silica is in the range of 10-30 mm, and the particle size of coke is in the range of 5-15 mm.

3. A silicon-manganese alloy smelting device for use in a silicon-manganese alloy efficient smelting method according to any one of claims 1 or 2, characterized in that: In S4, the smelting electric furnace includes a smelting furnace, and in S3, the airflow stirring and mixing device includes a mixing cylinder, which is arranged above the smelting furnace, and a gas pipeline connected to the interior of the smelting furnace is fixedly connected to the outside of the smelting furnace, and a filter box is fixedly connected to one side of the gas pipeline, and a centrifugal air pump is arranged above the filter box, and the input end of the centrifugal air pump is connected to the filter box through the gas pipeline, and the output end of the centrifugal air pump is fixedly connected to a gas branch pipe, and the gas branch pipe is connected to the interior of the smelting furnace, and a mixing mechanism for mixing raw materials is arranged inside the mixing cylinder; The mixing mechanism includes a motor A arranged inside the mixing barrel, the output end of the motor A is fixedly connected to the output shaft A, the bottom end of the output shaft A is fixedly connected to the stirring rod, the outer side of the stirring rod is fixedly connected to the mixing plate, the inner wall of the mixing barrel is fixedly connected to the sleeve, the bottom surface of the sleeve is fixedly connected to the reciprocating screw rod A, the reciprocating screw rod A is a hollow structure, the output shaft A passes through the interior of the reciprocating screw rod A, the bottom surface of the reciprocating screw rod A is fixedly connected to the chassis, the outer side of the sleeve is rotatably connected to a rotating ring, the outer side of the rotating ring is fixedly connected to a support plate, a guide plate is fixedly connected between the support plate and the mixing plate, the outer side of the reciprocating screw rod A is threadedly connected to a lifting ring, the outer side of the lifting ring is fixedly connected to a lifting plate, the lifting plate is sleeved on the outer side of the guide plate, the bottom surface of the lifting plate is fixedly connected to a vertical plate, the bottom surface of the vertical plate is fixedly connected to a lifting block, one side of the lifting block is fixedly connected to a side frame, and a shoveling component for shoveling material is provided inside the side frame.

4. The silicon-manganese alloy smelting device according to claim 3, characterized in that: The shoveling component includes a connecting short rod rotatably connected to the inner wall of the side frame, a flip plate is fixedly connected to the outer side of the connecting short rod, and the flip plate is arranged inside the side frame. A torsion spring A is provided at the connection between the connecting short rod and the inner wall of the side frame, and a bucket is fixedly connected to one side of the flip plate. There are two groups of side frames in total, and the two groups of side frames are symmetrically arranged on both sides of the lifting block. An inclined groove is provided on the upper surface of the mixing plate, and the inclined groove is arranged corresponding to the shoveling component. A valve is provided on the bottom surface of the mixing barrel.

5. The silicon-manganese alloy smelting device according to claim 4, characterized in that: A locking convex plate is provided on one side of the flip plate, a compression groove is provided on one side of the flip plate, a compression spring is provided inside the compression groove, one end of the compression spring is fixedly connected to the locking convex plate, a card slot is provided on the inner wall of the side frame, an oblique block is slidably connected inside the card slot, an inner groove is provided on the inner wall of the card slot, a limiting block is fixedly connected to the bottom surface of the oblique block, a spring A is fixedly connected between the limiting block and the inner wall of the inner groove, an unlocking plate is fixedly connected to one side of the guide plate, an unlocking groove is provided on the upper surface of the side frame, the unlocking plate is arranged corresponding to the unlocking groove, and the bottom end of the unlocking plate is arranged corresponding to the inclined end of the oblique block.

6. The silicon-manganese alloy smelting device according to claim 5, characterized in that: A heating ring A is fixedly connected to the inner wall of the mixing barrel, and a heating ring B is rotatably connected to the inner wall of the mixing barrel. The heating ring A is arranged above the heating ring B and is connected to the gas branch pipe. An air outlet is provided on the bottom surface of the heating ring A. One end of the mixing plate is fixedly connected to the inner wall of the heating ring B. An air storage ring groove is provided on one side of the heating ring B. The air storage ring groove is connected to the interior of the mixing plate and the interior of the guide plate. A one-way pressure valve B is provided on the outside of the mixing plate, and a one-way pressure valve A is provided on the outside of the guide plate.

7. The silicon-manganese alloy smelting device according to claim 6, characterized in that: A screw conveyor is fixedly connected to one side of the mixing barrel, a feed port is provided on the outside of the mixing barrel, and the screw conveyor is connected to the inside of the mixing barrel through the feed port. A stand is provided on one side of the mixing barrel, a screening box is provided above the stand, a screen A is provided on the inner wall of the screening box, a baffle plate is fixedly connected to the inner wall of the screening box, a screening component is provided below the baffle plate, a gathering hopper is fixedly connected to the bottom surface of the screening box, a proportioning box is provided on the bottom surface of the gathering hopper, and the proportioning box is provided corresponding to the screw conveyor.

8. The silicon-manganese alloy smelting device according to claim 7, characterized in that: The screening component includes a motor B arranged on one side of the screening box, the output end of the motor B is fixedly connected to a reciprocating screw rod B, a discharge assembly is arranged on the outside of the reciprocating screw rod B, the discharge assembly includes a telescopic plate threadedly connected to the outside of the reciprocating screw rod B, the telescopic plate is slidably connected to the inside of the baffle plate, the bottom surface of the telescopic plate is fixedly connected to a cross frame, a long rod is rotatably connected to the inside of the cross frame, and a discharge plate is fixedly connected to the outside of the long rod, and a discharge box is provided on one side of the screening box.

9. The silicon-manganese alloy smelting device according to claim 8, characterized in that: A torsion spring B is provided at the connection between the long rod and the inner wall of the horizontal frame, and a leakage groove is provided on the bottom surface of the discharge plate.

10. The silicon-manganese alloy smelting device according to claim 8, characterized in that: The inner cavity of the discharge box is tilted downward, and the outer receiving box receives the collecting box. The bottom surface of the inner wall of the discharge box is fixedly connected with a screen B, and the bottom surface of the screen B is fixedly connected with a feed box. The bottom end of the feed box is connected to the inside of the screening box.

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