A manganese-iron alloy slag treatment system and method

Abstract

The application discloses a manganese-iron alloy waste residue treatment system and method, and relates to the field of waste residue treatment. The system comprises a slag tapping chute and a ball mill cylinder, the ball mill cylinder is internally divided into a ball milling area and a magnetic separation area, the slag tapping chute extends into the ball milling area, a slag flushing nozzle is arranged on the slag tapping chute, a high-temperature-resistant conveying belt is arranged in the magnetic separation area, the high-temperature-resistant conveying belt is connected with a concentrate vibrating dehydration screen, the ball mill cylinder is connected with a tailing vibrating dehydration screen, a permanent magnet lining is arranged on the sidewall of the magnetic separation area, a material scraping plate is arranged on the high-temperature-resistant conveying belt and abuts against the inner wall of the permanent magnet lining, a steam collecting cover is arranged at the inlet and / or outlet of the ball mill cylinder, the steam collecting cover is connected with a heat exchanger, the heat exchanger is respectively connected with a cold air pipe and a hot air pipe, the hot air pipe is connected with the concentrate vibrating dehydration screen, the tailing vibrating dehydration screen is connected with a sewage treatment station through a recovery pipe, and the slag flushing nozzle is connected with the sewage treatment station through a water inlet pipe. The water quenching, grinding and magnetic separation are integrated in the ball mill cylinder, so that the resource recovery efficiency is improved, energy saving and environmental protection are realized, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of slag treatment technology, and in particular to a system and method for treating ferromanganese alloy waste slag. Background Technology

[0002] Ferromanganese alloys are important steelmaking raw materials, occupying a vital strategic position in the national economy. The steel industry alone consumes 90%-95% of manganese. Ferromanganese alloys include various grades such as high-carbon ferromanganese, medium-carbon, low-carbon, and micro-carbon ferromanganese. They are mainly used for deoxidation, desulfurization, and alloying of ordinary steel, and can also be used for alloying of special steel, welding wire, welding electrodes, and stainless steel. Statistics show that producing 1 ton of ferromanganese alloy generates 0.7-1.3 tons of ferromanganese alloy waste slag. If this waste slag is not utilized, it will result in resource waste. However, after water quenching treatment, the ferromanganese alloy waste slag has a wide range of applications. The traditional water quenching treatment process for ferromanganese alloy waste slag includes water quenching tank cooling → grab bucket slag removal → belt conveyor → ball mill grinding → magnetic separator separation → independent drying process. Each process operates independently, the process is relatively decentralized, lacks system synergy, occupies a large area, and the independent equipment such as water quenching tank, ball mill, magnetic separator, and dryer require additional slag transfer equipment (such as grab bucket and belt conveyor), resulting in low efficiency, high energy consumption, and serious waste of heat energy and water resources, which is difficult to meet the requirements of modern environmental protection and efficient resource utilization. Summary of the Invention

[0003] The main objective of this invention is to overcome the deficiencies of the prior art and provide a system and method for treating ferromanganese alloy waste slag.

[0004] To achieve the above objectives, this invention proposes a ferromanganese alloy waste slag treatment system, comprising a slag chute and a ball mill cylinder. The ball mill cylinder is internally divided into a ball milling zone and a magnetic separation zone by a partition plate. The partition plate has several through holes connecting the ball milling zone and the magnetic separation zone. One end of the slag chute extends into the ball milling zone along the inlet end of the ball mill cylinder. A slag flushing nozzle is provided at the bottom of the slag chute. A high-temperature resistant conveyor belt is provided in the magnetic separation zone. The high-temperature resistant conveyor belt extends out to the outside along the outlet end of the ball mill cylinder and connects to a concentrate vibrating dewatering screen. The outlet end of the ball mill cylinder is connected to a tailings vibrating dewatering screen. A permanent magnet bushing is provided around the side wall of the magnetic separation zone. The high-temperature conveyor belt within the area is equipped with collection guide plates on both sides, and a scraper is provided on one side of the collection guide plate. The scraper abuts against the inner wall of the permanent magnet bushing. A steam collection hood is provided above the inlet end and / or outlet end of the ball mill cylinder. The steam collection hood is connected to one end of the heat exchanger through a steam pipe. An induced draft fan is provided on the steam pipe. Cold air pipe and hot air pipe are respectively connected to the heat exchanger. A blower is provided on the cold air pipe. The hot air pipe is connected to the interior of the concentrate vibrating dewatering screen. A water receiving trough is provided at the bottom of the tailings vibrating dewatering screen. The water receiving trough is connected to the sewage treatment station through a recovery pipe. The slag flushing nozzle is connected to the sewage treatment station through a water inlet pipe. A booster pump is provided on the water inlet pipe. By integrating water quenching, grinding, and magnetic separation into the ball mill cylinder, intermediate equipment can be effectively reduced, space occupancy can be reduced, and the problem of process fragmentation in traditional processes can be overcome. Moreover, the waste steam generated by water quenching will not overflow into the atmosphere. After the waste steam exchanges heat with the air through a heat exchanger to form hot air, it is led into the inside of the concentrate vibrating dewatering screen for drying the concentrate. This fully utilizes thermal energy, improves resource recovery efficiency, and achieves energy conservation, environmental protection, and cost reduction.

[0005] Furthermore, the through-hole has a gradually expanding structure, and is arranged at an angle of 10°-15° to the horizontal direction. By adopting a gradually expanding structure, the through-hole reduces clogging caused by the adhesion and accumulation of fine particles in the slurry on the hole walls. Moreover, the inclined arrangement of the through-hole pushes the slurry towards the magnetic separation zone during rotation, reducing the residence time of the slurry in the ball milling zone and preventing dissociated magnetic particles from returning to the ball milling zone with the rotation of the cylinder, thus improving separation efficiency.

[0006] Furthermore, a central shaft is inserted through the center of the partition plate. One end of the central shaft, located within the magnetic separation zone, is fixedly connected to the bottom of the high-temperature resistant conveyor belt. An anti-clogging scraper is vertically mounted on the other end of the central shaft, located within the ball milling zone, and abuts against the side wall of the partition plate. When the partition plate rotates, the anti-clogging scraper scrapes off slag particles blocking the through-hole.

[0007] Furthermore, the separator plate has a spiral guide vane protruding from one side within the magnetic separation zone. As the spiral guide vane rotates with the separator plate, it can push the slurry to flow axially along the mill cylinder, preventing the slurry from stagnating or forming eddies near the separator plate, ensuring that the ground slurry enters the magnetic separation zone in a timely manner, and further improving the overall processing efficiency.

[0008] Furthermore, the slag chute is inclined, and its upper end is connected to an intermediate ladle. The slag flushing nozzle is fixedly installed at the bottom of the lower end of the slag chute. The flow rate of waste slag entering the slag chute is controlled by the intermediate ladle to avoid unstable flow.

[0009] Furthermore, the concentrate vibrating dewatering screen is equipped with a protective cover, which is used to isolate the dewatering area of ​​the concentrate vibrating dewatering screen from the outside, so as to ensure the effectiveness of the hot air generated by heat exchange when drying the concentrate.

[0010] Furthermore, the ball mill cylinder is provided with bearing seats at both ends, the bearing seats are fixedly mounted on the base, the outer circumference of the ball mill cylinder is provided with a large gear ring, the base is provided with a drive gear, the large gear ring is meshed with the drive gear, the base is provided with a drive component, the output end of the drive component is connected to the drive gear, and the ball mill cylinder is driven to rotate to perform work through the drive component.

[0011] Furthermore, the heat exchanger is equipped with a condensate tank at the bottom, which is connected to the wastewater treatment plant through a condensate recovery pipe. The condensate tank collects the condensate generated after the waste steam heat exchange and returns the condensate to the wastewater treatment plant for treatment, thus avoiding water waste.

[0012] This invention also proposes a method for treating ferromanganese alloy waste slag, which utilizes the aforementioned ferromanganese alloy waste slag treatment system to treat the waste slag, comprising the following steps:

[0013] S1. Pour the waste slag generated after smelting the ferromanganese alloy into the tundish, and control the molten waste slag to flow along the slag chute into the ball milling area of ​​the ball mill cylinder through the tundish.

[0014] S2. The clean water treated by the sewage treatment plant is drawn by the booster pump and enters the slag flushing nozzle through the inlet pipe. The slag flushing nozzle sprays water jets in the ball milling area to disperse the waste slag melt for water quenching. The resulting water quenching slag and slag flushing water fall into the ball milling area.

[0015] S3. The driving component drives the ball mill cylinder to rotate, so that the water-quenched slag is cooled and ground in the ball milling zone. The ground and pulverized water-quenched slag is mixed with the slag flushing water to form a slurry that passes through the partition plate and enters the magnetic separation zone.

[0016] S4. When the slurry passes through the magnetic separation zone, the magnetic particles in the slurry are adsorbed by the permanent magnet bushing and, as the ball mill cylinder rotates, leave the liquid surface to the top. They are then scraped off by the scraper and fall along the collection guide plate onto the high-temperature resistant conveyor belt, where they are conveyed to the concentrate vibrating dewatering screen for dewatering. The dewatered concentrate is returned to the refining furnace for further smelting. Meanwhile, the non-magnetic particles in the slurry overflow into the tailings vibrating dewatering screen for dewatering. The dewatered tailings are sold as building materials. The wastewater generated falls into the water receiving tank and is collected and then flows through the recycling pipe to the sewage treatment plant for treatment. The clean water obtained after treatment at the sewage treatment plant is circulated back to the slag flushing nozzle through the inlet pipe for use as slag flushing water.

[0017] Furthermore, in step S2, the waste steam generated by water quenching enters the heat medium channel of the heat exchanger through the steam collection hood and steam pipe via the induced draft fan. At the same time, the blower blows cold air from the outside into the cold medium channel of the heat exchanger through the cold air pipe for heat exchange. The generated hot air is introduced into the concentrate vibrating dewatering screen through the hot air pipe. While the concentrate is being dewatered, hot air is blown out for drying. The condensate generated by the waste steam after heat exchange flows to the wastewater treatment plant for treatment through the condensate recovery pipe.

[0018] The beneficial effects of this invention include: The invention introduces ferromanganese alloy waste slag into the grinding zone of the ball mill cylinder via a slag chute. Simultaneously, a booster pump draws treated clean water from a wastewater treatment plant, which is sprayed through a slag-flushing nozzle to disperse the ferromanganese alloy waste slag in the grinding zone for water quenching. The rotating ball mill cylinder grinds the water-quenched slag. The stress generated by the fracturing of the water-quenched slag is superimposed on the impact of the steel balls in the grinding zone, causing the water-quenched slag to break up rapidly, effectively improving grinding efficiency. Furthermore, the flushing water after quenching, as part of the grinding medium, forms a slurry. The flushing water flow has a dispersing effect, reducing heat accumulation during grinding, inhibiting particle agglomeration, resulting in more uniform grinding impact, and promoting rapid dissociation of manganese, iron, and other metallic minerals from gangue, which is beneficial for improving subsequent magnetic separation and recovery efficiency. The ground slurry enters the magnetic separation zone, where the magnetic particles in the slurry are adsorbed by the permanent magnet bushing and scraped. The plate is scraped onto a high-temperature resistant conveyor belt and conveyed to a concentrate vibrating dewatering screen for dewatering. The dewatered concentrate is returned to the refining furnace for remelting and recycling. The tailings slurry flows to a tailings vibrating dewatering screen for dewatering and is then sold as building material. The wastewater generated during dewatering is treated in a sewage treatment plant and then recycled as slag flushing water. The exhaust steam generated during the water quenching process is introduced into a heat exchanger for heat exchange. The hot air generated by the heat exchange enters the concentrate vibrating dewatering screen. While the concentrate vibrating dewatering screen vibrates and throws the material for dewatering, the hot air blows to dry it, increasing the dewatering effect. Compared with the water quenching process of transmission, this invention integrates water quenching, wet grinding, and magnetic separation into the ball mill cylinder, which can effectively reduce intermediate equipment, reduce space occupation, and overcome the process fragmentation problem of traditional processes. It improves resource recovery efficiency while achieving energy conservation, environmental protection, and cost reduction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the manganese-iron alloy waste slag treatment system from one perspective in an embodiment of the present invention.

[0020] Figure 2 This is an overall schematic diagram of the manganese-iron alloy waste slag treatment system from another perspective in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the interior of the ball mill cylinder after it has been cut open in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the installation of the separator and the high-temperature resistant conveyor belt in an embodiment of the present invention.

[0023] Figure Descriptions: 1. Slag Chute; 2. Ball Mill Cylinder; 201. Ball Milling Zone; 202. Magnetic Separation Zone; 203. Permanent Magnet Bushing; 3. Divider Plate; 301. Through Hole; 302. Central Shaft; 303. Anti-clogging Scraper; 304. Spiral Guide Blade; 4. Slag Flushing Nozzle; 401. Water Inlet Pipe; 402. Booster Pump; 5. High Temperature Conveyor Belt; 501. Collection Guide Plate; 502. Scraper Plate; 6. Concentrate Vibrating Dewatering Screen; 601. Protective Cover; 7. Tailings Vibrating Dewatering Screen; 8. Steam Collection Hood; 801. Steam Induction Pipe; 802. Induced Draft Fan; 9. Heat Exchanger; 901. Cold Air Pipe; 902. Hot Air Pipe; 903. Blower; 904. Condensate Tank; 905. Condensate Recovery Pipe; 10. Wastewater Treatment Plant; 11. Tundish; 12. Shaft Seat; 13. Base; 14. Large Gear Ring; 15. Drive Gear; 16. Drive Components. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of the embodiments of the present invention clearer, the present invention will be further described in detail below through experiments, in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Example 1

[0029] See Figures 1 to 4The ferromanganese alloy waste slag treatment system disclosed in this embodiment includes a slag chute 1 and a ball mill cylinder 2. The slag chute 1 has a hollow structure with a trapezoidal cross-section. The slag chute 1 is inclined and forms a 30° angle with the horizontal direction. Inside the ball mill cylinder 2, it is divided axially into a ball milling zone 201 and a magnetic separation zone 202 by a partition plate 3. The space of the magnetic separation zone 202 occupies one-quarter of the internal space of the ball mill cylinder 2. Several through holes 301 are provided on the partition plate 3 to connect the ball milling zone 201 and the magnetic separation zone 202. One end of the slag chute 1... (Outlet end) Extends along the inlet end of the ball mill cylinder 2 into the ball milling zone 201, which is filled with steel ball grinding media. The partition plate 3 can prevent the steel balls from entering the magnetic separation zone 202. To avoid the partition plate 3 affecting the magnetic field of the magnetic separation zone 202, the partition plate 3 is made of a non-magnetic material, such as stainless steel. A slag flushing nozzle 4 is provided at the bottom of the outlet end of the slag chute 1. The slag flushing nozzle 4 is fixedly installed at the bottom of the lower end of the slag chute 1. A high-temperature resistant conveyor belt 5 is horizontally installed in the magnetic separation zone 202. The horizontal position of the high-temperature resistant conveyor belt 5 is... The high-temperature conveyor belt 5 is positioned above the liquid level inside the ball mill cylinder 2 to prevent it from being submerged in water. The high-temperature conveyor belt 5 extends from the outlet end of the ball mill cylinder 2 to the outside of the cylinder and connects to the concentrate vibrating dewatering screen 6. A tailings vibrating dewatering screen 7 is connected to the outlet end of the ball mill cylinder 2. A permanent magnet bushing 203 is installed around the side wall of the magnetic separation zone 202. After the permanent magnet bushing 203 covers the entire side wall of the magnetic separation zone 202, its inner wall is a smooth circular surface. Collection guide plates 501 are axially installed on both sides of the high-temperature conveyor belt 5 located within the magnetic separation zone 202. A scraper 502 is provided on the collection guide plate 501 on one side. The scraper 502 abuts against the inner side wall of the top of the permanent magnet bushing 203. The scraper 502 is set on the collection guide plate 501 on the side behind the ball mill cylinder 2 along the rotation direction. The top of the collection guide plates 501 on both sides opens to the sides at an angle of 15°-20° with the axis of the ball mill cylinder 2, so as to guide the magnetic particle concentrate scraped off by the scraper 502 to fall onto the high temperature resistant conveyor belt 5, and then be conveyed to the concentrate vibrating dewatering screen 6 outside the ball mill cylinder 2 for dewatering through the high temperature resistant conveyor belt 5.A steam collecting hood 8 is provided above the inlet and / or outlet ends of the ball mill cylinder 2. The steam collecting hood 8 is funnel-shaped. The top outlet of the steam collecting hood 8 is connected to the hot medium inlet end of the heat exchanger 9 located outside the ball mill cylinder 2 via a steam duct 801. An induced draft fan 802 is provided on the steam duct 801. A cold air duct 901 and a hot air duct 902 are respectively connected to the heat exchanger 9. The cold air duct 901 is connected to the cold medium inlet end of the heat exchanger 9. A blower 903 is provided on the cold air duct 901. The hot air duct 902... One end of the hot air pipe 902 is connected to the outlet end of the heat medium of the heat exchanger 9, and the other end of the hot air pipe 902 is connected to the interior of the concentrate vibrating dewatering screen 6. A water receiving tank (not shown) is provided at the bottom of the tailings vibrating dewatering screen 7. The water receiving tank is used to collect the wastewater extracted during the dewatering operation of the tailings vibrating dewatering screen 7. The water receiving tank is connected to the sewage inlet pool of the sewage treatment station 10 through the recovery pipe 701. The slag flushing nozzle 4 is connected to the clear water pool of the sewage treatment station 10 through the water inlet pipe 401. A booster pump 402 is provided on the water inlet pipe 401. In this embodiment, ferromanganese alloy waste slag is introduced into the grinding zone 201 of the ball mill cylinder 2 through the slag chute 1. Simultaneously, a booster pump 402 draws clean water from the wastewater treatment plant 10, which is then sprayed through the inlet pipe 401 and the slag flushing nozzle 4 to disperse the ferromanganese alloy waste slag for water quenching. As soon as the slag solidifies and breaks into water-quenched slag with a particle size of approximately 50mm, it is immediately subjected to wet grinding under the rotation of the ball mill cylinder 2. The stress generated by the fragmentation of the water-quenched slag is superimposed on the impact of the steel balls in the grinding zone 201, causing the water-quenched slag to undergo wet grinding. The slag is rapidly crushed into particles with a diameter ≤1mm. The slag flushing water, as part of the grinding media, forms a slurry system, which has a dispersing effect, reducing heat accumulation during the grinding process, inhibiting particle agglomeration, and making the impact of the steel balls more uniform. This effectively promotes the rapid dissociation of manganese, iron, and other metallic minerals from gangue, improving the efficiency of subsequent magnetic separation and recovery. The ground slurry flows through the through-holes 301 on the partition plate 3 into the magnetic separation zone 202 towards the outlet end of the ball mill cylinder 2. The magnetic particles in the slurry are then absorbed by the permanent magnet lining. The ore is adsorbed by the 203 sleeve and, as the ball mill cylinder 2 rotates, leaves the liquid surface and rotates to the top. It is then scraped off by the scraper 502 and falls along the collection guide 501 onto the high-temperature conveyor belt 5, where it is conveyed to the concentrate vibrating dewatering screen 6 for dewatering. The dewatered concentrate is returned to the refining furnace for further smelting and recycling. The tailings slurry overflows into the tailings vibrating dewatering screen 7 for dewatering and is then sold as building material. The wastewater generated during dewatering is treated in the wastewater treatment plant 10 and then recycled as flushing water. Since water quenching is carried out inside the ball mill cylinder 2, the waste steam generated during the water quenching process will not directly overflow and pollute the site environment. The waste steam is extracted by the induced draft fan 802, and enters the heat exchanger 9 through the steam collection hood 8 and the steam pipe 801. It exchanges heat with the outside cold air extracted by the blower 903 in the heat exchanger 9. The heated hot air enters the concentrate vibrating dewatering screen 6 through the hot air pipe 902. While the concentrate vibrating dewatering screen 6 vibrates and throws the material to dewater, the hot air blows to dry it, further increasing the dewatering effect.Compared to traditional water quenching processes, integrating water quenching, wet grinding, and magnetic separation within the ball mill cylinder 2 effectively reduces intermediate equipment and space requirements, overcoming the fragmented process issues of traditional methods. This improves resource recovery efficiency while achieving energy conservation, environmental protection, and cost reduction.

[0030] In a preferred embodiment, to ensure the slurry can smoothly pass through the separator 3 and enter the magnetic separation zone 202, the through-hole 301 is designed with a gradually expanding structure. The diameter of the through-hole 301 on one side of the ball mill zone 201 is smaller (e.g., 0.5-1 mm), while the diameter on the other side of the magnetic separation zone 202 is larger (e.g., 2-3 mm), forming a funnel-shaped channel. This reduces the adhesion and accumulation of fine particles in the slurry on the hole walls. The through-hole 301 is arranged at an angle of 10°-15° to the horizontal direction, and the tilt direction is consistent with the rotation direction of the ball mill cylinder 2. When the separator 3 rotates with the ball mill cylinder 2, the slurry is pushed towards the magnetic separation zone 202 (the outlet end of the ball mill cylinder 2) due to the combined effects of centrifugal force and the tilt angle. This reduces the residence time of the slurry in the ball mill zone 201 and prevents dissociated magnetic particles from returning to the ball mill zone with the rotation of the cylinder, thus improving separation efficiency.

[0031] In a preferred embodiment, a central shaft 302 is inserted through the center of the separator plate 3. The central shaft 302 is coaxial with the axis of the ball mill cylinder 2. One end of the central shaft 302 located in the magnetic separation zone 202 is fixedly connected to the bottom of the high-temperature resistant conveyor belt 5. An anti-clogging scraper 303 is vertically provided on the other end of the central shaft 302 located in the ball mill zone 201. The anti-clogging scraper 303 abuts against the side wall of the separator plate 3. The central shaft 302 is used to fix and support the anti-clogging scraper 303. When the separator plate 3 rotates, the anti-clogging scraper 303 remains fixed to scrape off particles blocking the through hole 301 of the separator plate 3, thus preventing the through hole 301 from becoming blocked and affecting work efficiency.

[0032] In a preferred embodiment, a spiral guide vane 304 is provided on one side of the partition plate 3 located within the magnetic separation zone 202. When the spiral guide vane 304 rotates with the partition plate 3, its spiral direction can push the slurry along the axial direction of the ball mill cylinder 2 (towards the outlet end of the magnetic separation zone 202), preventing the slurry from stagnating or forming eddies near the partition plate 3, ensuring that the ground slurry enters the magnetic separation zone 202 in a timely manner, and further improving the overall processing efficiency.

[0033] In a specific example, an intermediate ladle 11 is connected to the upper end of the slag chute 1. The intermediate ladle 11 receives the slag to be water quenched, preventing the slag from directly entering the slag chute 1 and causing the flow rate to fluctuate, thus ensuring the continuity of the subsequent water quenching process.

[0034] In a specific example, a protective cover 601 is provided on the concentrate vibrating dewatering screen 6. The protective cover 601 is used to isolate the dewatering area of ​​the concentrate vibrating dewatering screen 6 from the outside, thereby increasing the effect of hot air blowing to dry the concentrate.

[0035] In a specific example, bearing seats 12 are provided at both ends of the ball mill cylinder 2, and the bearing seats 12 are fixedly mounted on the base 13. A large gear ring 14 is provided on the outer periphery of the ball mill cylinder 2, and a drive gear 15 is provided on the base 13. The large gear ring 14 is meshed with the drive gear 15. A drive component 16 is provided on the base 13, and the output end of the drive component 16 is connected to the drive gear 15. The drive component 16 consists of a motor and a reduction gearbox. The motor's output is reduced in speed by the reduction gearbox and then drives the drive gear 15 to rotate, which in turn drives the large gear ring 14 to rotate, thereby driving the ball mill cylinder 2 to rotate.

[0036] In a preferred embodiment, a condensate tank 904 is provided at the bottom of the heat exchanger 9, and the condensate tank 904 is connected to the wastewater treatment station 10 through a condensate recovery pipe 905. The condensate tank 904 is connected to the heat source channel of the heat exchanger 9. When the exhaust steam exchanges heat with the air in the heat exchanger 9, the generated condensate flows to the condensate tank 904 below for collection. The collected condensate is discharged into the wastewater treatment station 10 for treatment and recycling through the condensate recovery pipe 905.

[0037] Example 2

[0038] Continue reading Figures 1 to 4 The ferromanganese alloy waste slag treatment method disclosed in this embodiment uses the ferromanganese alloy waste slag treatment system in Example 1 to treat the ferromanganese alloy waste slag, and includes the following steps:

[0039] S1. The ferromanganese alloy waste slag produced after ferromanganese alloy refining is poured into the intermediate ladle 11, and the molten waste slag is controlled by the intermediate ladle 11 to enter the molten slag chute 1 and flow along the molten slag chute 1 into the ball milling zone 201 of the ball mill cylinder 2.

[0040] S2. At the same time, the booster pump 402 draws clean water that has been treated by the sewage treatment station 10 and enters the slag flushing nozzle 4 through the water inlet pipe 401. The slag flushing nozzle 4 sprays water jets in the ball milling area 201 to disperse the molten manganese-iron alloy waste slag for water quenching. The resulting water quenching slag and slag flushing water fall into the ball milling area 201.

[0041] S3, the drive component 16 drives the ball mill cylinder 2 to rotate, so that the water-quenched slag is cooled in the ball milling zone 201 and immediately ground and crushed. The ground and crushed water-quenched slag is mixed with the slag flushing water to form a slurry. The amount of water sprayed from the slag flushing nozzle 4 is balanced with the amount of water required for wet grinding in the ball milling zone 201. By integrating the water quenching and grinding processes into the ball milling zone 201 of the ball mill cylinder 2, the equipment such as slag pool, grab bucket, and belt conveyor in the traditional process is reduced, which can effectively reduce the floor space and investment cost. Moreover, the water-quenched slag is ground immediately after water quenching. At this time, the water-quenched slag still has thermal stress inside, low hardness and high brittleness, which makes it easier to grind and crush, which can effectively improve the grinding efficiency and improve the degree of dissociation of the water-quenched slag. The qualified slurry passes through the through hole 30 on the partition plate 3 and enters the magnetic separation zone 202.

[0042] S4. When the slurry passes through the magnetic separation zone 202, the magnetic particles in the slurry are adsorbed by the permanent magnet bushing 203 and leave the liquid surface as the ball mill cylinder 2 rotates. When they reach the top, they are scraped off by the scraper 502 and fall onto the high-temperature resistant conveyor belt 5 along the collection guide plate 501. The high-temperature resistant conveyor belt 5 then transports the slurry to the concentrate vibrating dewatering screen 6 for dewatering. The dewatered concentrate is returned to the refining furnace for remelting and recycling. Meanwhile, the non-magnetic particles in the slurry overflow into the tailings vibrating dewatering screen 7 for dewatering. The dewatered tailings are sold as building materials. The wastewater generated by the tailings vibrating dewatering screen 7 falls into the receiving water system. After being collected in the tank, the water flows to the wastewater treatment plant 10 through the recovery pipe 701 for treatment. The clean water obtained after treatment at the wastewater treatment plant 10 is recycled back to the slag flushing nozzle 4 through the inlet pipe 401 for use as slag flushing water, thus avoiding water waste and preventing direct discharge of wastewater into the environment. This invention integrates water quenching, grinding and magnetic separation into the ball mill cylinder 2, achieving a high degree of process integration. This effectively overcomes the limitations of traditional segmented water quenching-grinding-magnetic separation processes, such as low material transfer efficiency, high energy consumption and cost, and large equipment footprint, thereby improving resource utilization and meeting the needs of modern environmental protection and efficient resource utilization.

[0043] In step S2, the waste steam generated by water quenching enters the hot medium channel of heat exchanger 9 through steam collection hood 8 and steam pipe 801 via induced draft fan 802. At the same time, blower 903 blows cold air from the outside into the cold medium channel of heat exchanger 9 through cold air pipe 901 for heat exchange. The generated hot air is introduced into concentrate vibrating dewatering screen 6 through hot air pipe 902. While the concentrate is dewatered, hot air is blown out for drying, further improving the drying efficiency of the concentrate. The condensate generated by the waste steam after heat exchange flows to wastewater treatment station 10 for treatment through condensate recovery pipe 905. Since water quenching is inside ball mill cylinder 2, the waste steam generated by water quenching will not overflow and pollute the external environment. After being collected by steam collection hood 8, it is introduced into heat exchanger 9 to recover heat, which can avoid heat loss.

[0044] In step S3, after the water-quenched slag is ground and mixed with the slag-washing water to form a slurry, the partition plate 3 rotates synchronously with the ball mill cylinder 2. Since the through holes 301 on the partition plate 3 have a gradually expanding structure and are arranged at an angle of 10°-15° with the horizontal direction, the slurry is pushed to one side of the magnetic separation zone 202 due to the combined effect of centrifugal force and the tilt angle. During the rotation of the partition plate 3, the anti-blocking scraper 303 scrapes off the particles blocking the opening of the through holes 301. The spiral guide vanes 304 on one side of the partition plate 3 rotate to generate suction, which draws the slurry from the ball mill zone 201 into the magnetic separation zone 202 and pushes the slurry to move along the outlet direction, ensuring that the slurry with qualified particle size after grinding can effectively pass through the through holes 301 into the magnetic separation zone 202 without causing blockage and improving processing efficiency.

[0045] The above description provides a further detailed explanation of the present invention in conjunction with specific / preferred embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A ferromanganese alloy waste slag treatment system, characterized in that, The system includes a slag chute and a ball mill cylinder. The ball mill cylinder is internally divided into a ball milling zone and a magnetic separation zone by a partition plate. The partition plate has several through holes connecting the ball milling zone and the magnetic separation zone. One end of the slag chute extends into the ball milling zone along the inlet end of the ball mill cylinder. A slag flushing nozzle is located at the bottom of the slag chute. A high-temperature resistant conveyor belt is installed in the magnetic separation zone. The high-temperature resistant conveyor belt extends outward from the outlet end of the ball mill cylinder and connects to a concentrate vibrating dewatering screen. The outlet end of the ball mill cylinder is connected to a tailings vibrating dewatering screen. A permanent magnet bushing is installed around the side wall of the magnetic separation zone. On both sides of the high-temperature resistant conveyor belt located within the magnetic separation zone... The mill has a collection guide plate, and a scraper is provided on one side of the collection guide plate. The scraper abuts against the inner wall of the permanent magnet bushing. A steam collection hood is provided above the inlet end and / or outlet end of the ball mill cylinder. The steam collection hood is connected to one end of the heat exchanger through a steam pipe. An induced draft fan is provided on the steam pipe. A cold air pipe and a hot air pipe are respectively connected to the heat exchanger. A blower is provided on the cold air pipe. The hot air pipe is connected to the interior of the concentrate vibrating dewatering screen. A water receiving trough is provided at the bottom of the tailings vibrating dewatering screen. The water receiving trough is connected to the sewage treatment station through a recovery pipe. The slag flushing nozzle is connected to the sewage treatment station through a water inlet pipe. A booster pump is provided on the water inlet pipe.

2. The ferromanganese alloy waste slag treatment system as described in claim 1, characterized in that: The through hole has a gradually expanding structure, and the through hole is arranged at an angle of 10°-15° with the horizontal direction.

3. The ferromanganese alloy waste slag treatment system as described in claim 2, characterized in that: A central shaft is inserted through the center of the partition plate. One end of the central shaft, located in the magnetic separation zone, is fixedly connected to the bottom of the high-temperature resistant conveyor belt. An anti-blocking scraper is vertically installed on the other end of the central shaft, located in the ball milling zone, and the anti-blocking scraper abuts against the side wall of the partition plate.

4. The ferromanganese alloy waste slag treatment system as described in claim 3, characterized in that: The separator plate has a spiral guide vane protruding on one side within the magnetic separation zone.

5. The ferromanganese alloy waste slag treatment system as described in claim 4, characterized in that: The slag chute is inclined, and the upper end of the slag chute is connected to an intermediate ladle. The slag flushing nozzle is fixedly installed at the bottom of the lower end of the slag chute.

6. The ferromanganese alloy waste slag treatment system as described in claim 5, characterized in that: The concentrate vibrating dewatering screen is equipped with a protective cover, which is used to isolate the dewatering area of ​​the concentrate vibrating dewatering screen from the outside.

7. The ferromanganese alloy waste slag treatment system as described in claim 1, characterized in that: The ball mill cylinder is provided with bearing seats at both ends, and the bearing seats are fixedly mounted on the base. The outer circumference of the ball mill cylinder is provided with a large gear ring, and the base is provided with a drive gear. The large gear ring meshes with the drive gear. The base is provided with a drive component, and the output end of the drive component is connected to the drive gear.

8. The ferromanganese alloy waste slag treatment system as described in claim 1, characterized in that: The heat exchanger is equipped with a condensate tank at its bottom, and the condensate tank is connected to the sewage treatment plant through a condensate recovery pipe.

9. A method for treating ferromanganese alloy waste slag, characterized in that: The process of treating ferromanganese alloy waste slag using the ferromanganese alloy waste slag treatment system according to any one of claims 1 to 8 includes the following steps: S1. Pour the waste slag generated after smelting the ferromanganese alloy into the tundish, and control the molten waste slag to flow along the slag chute into the ball milling area of ​​the ball mill cylinder through the tundish. S2. The clean water treated by the sewage treatment plant is drawn by the booster pump and enters the slag flushing nozzle through the inlet pipe. The slag flushing nozzle sprays water jets in the ball milling area to disperse the waste slag melt for water quenching. The resulting water quenching slag and slag flushing water fall into the ball milling area. S3. The driving component drives the ball mill cylinder to rotate, so that the water-quenched slag is cooled and ground in the ball milling zone. The ground and pulverized water-quenched slag is mixed with the slag flushing water to form a slurry that passes through the partition plate and enters the magnetic separation zone. S4. When the slurry passes through the magnetic separation zone, the magnetic particles in the slurry are adsorbed by the permanent magnet bushing and, as the ball mill cylinder rotates, leave the liquid surface to the top. They are then scraped off by the scraper and fall along the collection guide plate onto the high-temperature resistant conveyor belt, where they are conveyed to the concentrate vibrating dewatering screen for dewatering. The dewatered concentrate is returned to the refining furnace for further smelting. Meanwhile, the non-magnetic particles in the slurry overflow into the tailings vibrating dewatering screen for dewatering. The dewatered tailings are sold as building materials. The wastewater generated falls into the water receiving tank and is collected and then flows through the recycling pipe to the sewage treatment plant for treatment. The clean water obtained after treatment at the sewage treatment plant is circulated back to the slag flushing nozzle through the inlet pipe for use as slag flushing water.

10. The method for treating ferromanganese alloy waste slag as described in claim 9, characterized in that: In step S2, the waste steam generated by water quenching is drawn by an induced draft fan and enters the heat medium channel of the heat exchanger along the steam collection hood and steam pipe. At the same time, a blower blows cold air from the outside into the cold medium channel of the heat exchanger through a cold air pipe for heat exchange. The generated hot air is introduced into the concentrate vibrating dewatering screen through a hot air pipe. While the concentrate is being dewatered, hot air is blown out for drying. The condensate generated by the waste steam after heat exchange flows to the wastewater treatment plant for treatment through a condensate recovery pipe.

Images