Environment-friendly manganese slag harmless treatment automation assembly line

Abstract

The utility model discloses an environmental protection type manganese residue innocuous treatment automation assembly line belongs to manganese residue processing technical field, and this assembly line includes conveying belt, rubbing crusher, powder batching system, closed conveying belt, drum reaction constant temperature drying machine, closed belt roller press, reagent batching system, secondary rubbing crusher, fast mixer, matched heating environmental protection equipment, automatic sampling equipment, closed finished product storehouse, monorail travelling crane and automation control equipment etc. Through multistage crushing, constant temperature reaction, drying, roller pressing and full -enclosed processing, combine automation control and environmental protection equipment, have solved the problem such as manganese residue processing not thoroughly, serious pollution, high cost, low efficiency etc. in the prior art. The manganese residue after treatment reaches the standard, and realizes full -automatic continuous production, reduces the cost, reduces secondary pollution, has remarkable environmental protection and economic value.

Description

Technical Field

[0001] This utility model relates to the field of manganese slag treatment technology, and in particular to an environmentally friendly automated production line for harmless treatment of manganese slag. Background Technology

[0002] Manganese slag treatment is of great significance in industrial production, but current treatment technologies have many defects and shortcomings. The original method involved manually adding calcium oxide powder to a cement-hardened site and using a loader to mix and compact it. This process generates a large amount of ammonia gas and some lime dust, severely impacting the operating environment. Therefore, equipment improvements are necessary.

[0003] The improved processing technology involves crushing manganese slag using a wet crusher, conveying it via belt to a pretreatment storage tank (cement bulk silo) for fermentation, and then conveying it out via belt after 24 hours of natural temperature fermentation. However, this process has the following problems: 1. Manganese slag is manganese slag cake filtered by plate and frame filter press. It has a moisture content of about 25% and a high viscosity. If it enters the wet crusher for crushing, it will stick to the crushing equipment within one hour, causing the equipment to malfunction and requiring the machine to be stopped for cleaning before it can continue. Working for 1 hour and then stopping for cleaning for 2 hours makes continuous operation impossible.

[0004] 2. After crushing, the manganese slag is added to lime powder and conveyed directly into the fermentation tank within a few minutes. The material is thrown down from a height and piled up solidly. After 24 hours of reaction, the material in the fermentation tank becomes severely clumped (because water vapor and ammonia cannot dissipate). Furthermore, due to the high concentration of ammonia, it is impossible to enter the tank for cleaning, which is unsustainable.

[0005] 3. The crushed manganese slag is in the form of 1-10mm particles. It does not react fully with lime powder. The material in the fermentation tank is piled up to 4-5 meters high. The ammonia and water vapor produced by the reaction cannot be dissipated, resulting in serious excess of residual ammonia nitrogen (about 10 times) and excess of soluble manganese content (more than 15 times) in the manganese slag.

[0006] The latest generation of equipment operates as follows: manganese slag is crushed after being added to lime powder (to prevent it from sticking to the equipment). A solidifying agent (liquid) is added while the slag is being conveyed via belt conveyor. After mixing thoroughly, the mixture is released and spread evenly on a cement surface for fermentation. A loader is used to continuously turn the mixture over for 3-4 hours until the ammonia concentration is low, at which point it is piled up and removed from storage. However, this process and equipment also have problems: 1. After the initial crushing and rolling by the loader, although most of the material is crushed, a small portion of the material with a particle size ≥3mm still fails to react fully. Furthermore, the lime powder and manganese slag are not evenly distributed, resulting in inconsistent material quality after processing.

[0007] 2. Ammonia and dust are not recovered. During operation, the workshop is filled with smoke and dust, causing secondary pollution. Untreated materials are scattered all over the floor. If they are soaked and washed away by rain, they will cause secondary pollution.

[0008] 3. Manual operation leads to uneven mixing of materials and ingredients, high labor intensity, and while solving the pollution problem, it also brings secondary pollution. Therefore, this equipment and operation mode are not advisable.

[0009] Given the shortcomings of the existing equipment, further research and development and technological upgrades are urgently needed to ensure that the treated waste residue is controlled within the national standard range, the quality is stable, the materials are not spilled during the treatment process, the treatment workshop can operate continuously, and the workshop environment meets environmental protection requirements (wastewater, ammonia, and dust meet standards). Utility Model Content

[0010] The main purpose of this utility model is to provide an environmentally friendly automated production line for the harmless treatment of manganese slag, so as to solve the problems of incomplete treatment, serious pollution, high cost and low efficiency in the existing manganese slag treatment technology.

[0011] To achieve the above objectives, this utility model proposes an environmentally friendly automated production line for the harmless treatment of manganese slag, comprising a crusher (wet coarse crusher), a powder batching system, a closed conveyor belt, a first drum reaction constant temperature dryer, a second drum reaction constant temperature dryer, a first closed vibrating screen belt roller press, a second closed vibrating screen belt roller press, a reagent batching system, a secondary crusher (dry fine crusher), a high-speed mixer, a first closed transfer conveyor belt, and a second closed transfer conveyor belt; The enclosed conveyor belts include a first enclosed conveyor belt (raised 2m), a second enclosed conveyor belt (to extend the reaction time), a third enclosed conveyor belt (raised 2m), a fourth enclosed conveyor belt, and a fifth enclosed conveyor belt (for material entry into the silo at a 4m height during reaction time); the powder batching system includes a first powder batching system and a second powder batching system; The pulverizer is used to crush the manganese slag after water washing and filter pressing, and discharges it to the first enclosed conveyor belt. The powder batching system (neutralizing agent) mixes lime powder into the crushed manganese slag and then conveys it to the drum reaction constant temperature dryer. The drum reaction constant temperature dryer maintains the temperature, stirs, reacts, and dries the material before discharging it to the first enclosed vibrating screen belt roller press for screening and pressing. The reagent batching system evenly sprays aqueous reagent (curing agent) onto the material on the second enclosed conveyor belt. The second conveyor belt maintains the temperature, reacts, and dries the material before conveying it to the first enclosed transfer conveyor belt for further processing. After being transferred, the material enters the secondary crusher (fine crushing) for secondary crushing. After secondary crushing, the material is discharged to the third enclosed conveyor belt and conveyed to the second drum reaction constant temperature dryer for secondary constant temperature, stirring, reaction, and drying. After drying, the material is released to the second enclosed vibrating screen belt roller press. After secondary screening and roller pressing, the material is sent to the fourth enclosed conveyor belt for constant temperature reaction. Then, it is conveyed to the second enclosed transfer conveyor belt, where materials that meet the standards and those that do not are transferred. Materials that do not meet the standards are returned to the crusher (rework) via the second enclosed transfer conveyor belt; materials that meet the standards enter the high-speed mixer for mixing and discharge.

[0012] Optionally, the second enclosed transfer conveyor belt is equipped with a second powder batching system (stabilization). The second powder batching system adds ingredients or stabilizers to qualified materials according to material detection data, and then the materials enter the high-speed mixer for thorough mixing.

[0013] Optionally, after being mixed by the high-speed mixer, the material is discharged to the fifth enclosed conveyor belt, which transports the material to the enclosed finished product silo.

[0014] Optionally, the fourth enclosed conveyor belt is equipped with a duct heater, and the duct heater is connected to a Roots blower.

[0015] Optionally, the air duct heater heats the 90°C hot air produced by the Roots blower to 120°C by electric heating, and 90% of the hot air volume is sent to the end of the fourth closed conveyor belt. The direction of the hot air is opposite to the direction of the material, and the reverse blowing air enters from the end of the fourth closed conveyor belt to the middle section outlet of the first closed belt roller press.

[0016] Optionally, a gas pipeline is provided between the second enclosed vibrating screen belt roller press and the first enclosed conveyor belt. 10% of the hot air volume enters the front section of the first enclosed conveyor belt from the gas pipeline and blows in the same direction to transport lime powder into the first drum reaction constant temperature dryer.

[0017] Optionally, the first enclosed belt roller press is connected to a pulse dust collector via a pipeline, the pulse dust collector is connected to an induced draft fan, and the induced draft fan is connected to an ammonia treatment and collection system.

[0018] Optionally, the air volume of the induced draft fan is equal to 5 times that of the blower, to ensure that ammonia dust does not escape from the pulverizer inlet at the front end of the production line.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. Achieve automated control and 24 / 7 operation, saving manpower: Only 3 people are needed per shift (1 person for electromechanical, 1 person for quality inspection, and 1 person for batching), plus 1 person for production technology management, for a total of 10 people. On average, each person can produce 100 tons per day. Compared with the existing equipment, the number of operators is reduced by at least half for the same output, and the labor intensity is also reduced.

[0020] 2. The three batching systems use electric variable frequency feeders (flow meters), which can adjust the flow rate, accurately measure and feed materials, and reduce the use of forklifts.

[0021] 3. The entire process from the hot air inlet to the induced draft fan outlet is sealed. In order to prevent hot air from overflowing from the manganese slag inlet, a special 10% hot air volume is installed in front of the fourth item (sealed conveyor belt) equipment. This can both heat the drum reactor and intercept hot air from overflowing from the inlet, and also increase the air volume of the induced draft fan (5 times the air volume of the blower) to ensure the air quality in the workshop environment.

[0022] 4. Ensure the reaction time and quality of the waste residue after the harmless treatment of manganese slag, so that the materials can react fully, shorten the reaction time, reduce the moisture content of the materials, quickly recover ammonia, reduce the amount of ingredients used, and improve the quality of harmless treatment.

[0023] 5. It can be recycled to a 10% ammonia solution, which can be used in the chemical processing workshop to neutralize the leachate, thus realizing resource utilization.

[0024] 6. All equipment uses variable frequency motors, which can adjust the power of the equipment, flexibly adjust the production capacity (50%-100%), extend the service life of the equipment, reduce the wear and tear of parts and power consumption, and realize an automated control system.

[0025] 7. Each process step meets the operational requirements for the harmless treatment of manganese slag, reducing the cost of raw materials by about 30%, saving 50% on labor costs, increasing by-product recovery by 90%, and is safe and environmentally friendly. It is the manganese slag harmless treatment equipment with the lowest processing cost, the most energy-saving and environmentally friendly, and fully automated. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of an embodiment of the environmentally friendly automated production line for harmless treatment of manganese slag according to this utility model.

[0028] Explanation of icon numbers: The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0032] This utility model proposes an environmentally friendly automated production line 100 for the harmless treatment of manganese slag.

[0033] Please see Figure 1In one embodiment of this utility model, the environmentally friendly manganese slag harmless treatment automated production line 100 includes a crusher 2, a powder batching system, a closed conveyor belt, a first drum reaction constant temperature dryer 5, a second drum reaction constant temperature dryer 12, a first closed vibrating screen belt roller press 6, a second closed vibrating screen belt roller press 13, a reagent batching system 7, a secondary crusher 10, a high-speed mixer 17, a first closed transfer conveyor belt 9, a second closed transfer conveyor belt 16, an automatic sampling device 20, a closed finished product silo 21, a monorail trolley 22, and an automated control device 23.

[0034] The enclosed conveyor belts include a first enclosed conveyor belt 4, a second enclosed conveyor belt 8, a third enclosed conveyor belt 11, a fourth enclosed conveyor belt 14, and a fifth enclosed conveyor belt 18; the powder batching system includes a first powder batching system 3 and a second powder batching system 15. Conveyor belt 1 feeds the washed and filtered manganese slag into the feed inlet of the crusher 2. The crusher 2 consists of two layers: the upper layer is a roller press structure that uses a roller principle to squeeze and press the filter cake into lumps, causing the material to loosen and fall to the lower layer, where it undergoes rapid crushing to reduce most of the material to powder smaller than 3mm, which is then discharged onto the first enclosed conveyor belt 4. The first powder batching system 3 adds lime powder to the rear end of the first enclosed conveyor belt 4. The first enclosed conveyor belt 4 transports the material with added lime powder to the first drum reaction constant temperature dryer 5. The first drum reaction constant temperature dryer 5 performs constant temperature, stirring, reaction, and drying on the material before releasing it to the first enclosed vibrating screen belt roller press 6. The drum rotation speed of the first enclosed vibrating screen belt roller press 6 is 1.3 times the belt speed. The material, after being screened to a size greater than 5mm and subjected to three roller pressing processes, is fed into the second enclosed conveyor belt 8. The reagent dispensing system 7 evenly sprays the aqueous reagent onto the material within the second enclosed conveyor belt 8. The second enclosed conveyor belt 8 then processes the material under constant temperature, reaction, and drying conditions before conveying it to the first enclosed transfer conveyor belt 9. The secondary pulverizer 10 receives the material from the first enclosed transfer conveyor belt 9 and performs secondary fine crushing to reduce the material mesh size to 70-100 mesh before discharging it to the third enclosed conveyor belt 11. The third enclosed conveyor belt 11 conveys the material to the second drum reaction constant temperature dryer 12. The second drum reaction constant temperature dryer 12 processes the material under constant temperature, stirring, reaction, and drying conditions for a second time before releasing it to the second enclosed vibrating screen belt roller press 13. The drum rotation speed of the second enclosed vibrating screen belt roller press 13 is 1.3 times the belt speed. Materials larger than 3mm after secondary screening undergo three roller pressing processes before being fed into the fourth enclosed conveyor belt 14. The fourth enclosed conveyor belt 14 then conducts a constant-temperature reaction on the materials before conveying them to the second enclosed transfer conveyor belt 16. The motor of the second enclosed transfer conveyor belt 16 is designed to rotate clockwise and counterclockwise, transferring materials that meet or do not meet the standards. Materials that do not meet the standards are returned to the crusher 2 via the transfer conveyor belt. Materials that meet the standards enter the high-speed mixer 17 for crushing and mixing. The high-speed mixer 17 receives the qualified materials from the second enclosed transfer conveyor belt 16, mixes them thoroughly with the second powder batching system 15 according to material detection data, and then discharges them to the fifth enclosed conveyor belt 18. The fifth enclosed conveyor belt 18 conveys the materials to the enclosed finished product silo 21. The enclosed finished product silo 21 is 4m above the ground and is equipped with a dust collector and an electric unloading valve, facilitating direct loading and unloading by dump trucks.

[0035] The fourth enclosed conveyor belt 14 is equipped with a duct heater 192, which is connected to a Roots blower 191. The duct heater 192 heats the 90°C hot air generated by the Roots blower 191 to 120°C by electric heating. 90% of the hot air volume is sent into the air intake at the end of the fourth enclosed conveyor belt 14. The direction of the hot air is opposite to the direction of the material. The reverse blowing air enters from the end of the fourth enclosed conveyor belt 14 and goes to the middle section outlet of the first enclosed vibrating screen belt roller press 6.

[0036] A gas pipe 196 is provided between the second enclosed vibrating screen belt roller press 13 and the first enclosed conveyor belt 4. 10% of the hot air volume enters the front section of the first enclosed conveyor belt 4 from the gas pipe 196 and blows air in the same direction. The first enclosed vibrating screen belt roller press 6 is connected to a pulse dust collector 194 through a pipe. The pulse dust collector 194 is connected to an induced draft fan 193. The induced draft fan 193 is connected to an ammonia treatment and collection system 195. The air-pumped lime powder enters the first drum reaction constant temperature dryer 5 and then enters the pulse dust collector 194 at the middle section outlet of the first enclosed vibrating screen belt roller press 6.

[0037] The air volume of the induced draft fan 193 is 5 times that of the Roots blower 191. The Roots blower 191 sends the gas into the pulse dust collector 194 to ensure that ammonia dust does not escape from the pulverizer 2 at the front end of the production line. The pulse dust collector 194 recovers the dust and sends it into the inlet of the pulverizer 2. The treated gas is sent by the induced draft fan 193 into the ammonia treatment and collection system 195. The ammonia treatment and collection system 195 includes a first ammonia water collection tank, a second ammonia water collection tank, and a water circulation spray tower connected in sequence. The gas enters the bottom of the first ammonia water collection tank under pressure, is treated by 3 meters of water pressure, enters the second identical ammonia water collection tank, and is treated in the same way before entering the water circulation spray tower. The gas after ammonia removal by spraying is discharged from the outlet of the water pressure (1 meter).

[0038] The automatic sampling device 20 has two sampling points located at the front end of the crusher 2 and the rear end of the fourth enclosed conveyor belt 14, respectively. A sample is taken every 1 meter, an hourly average sample is taken every hour, and a daily average sample is taken every 24 hours. The samples are stored and the data is archived. The monorail trolley 22 runs along the track above the center line of the conveyor belt 1 to the second enclosed conveyor belt 8, and is used for replenishing materials and equipment maintenance. The automatic control device 23 can adjust the power of the equipment and the coordination of each piece of equipment. The production capacity can be arbitrarily selected from 50% to 100%, and is used to control all variable frequency motors, feeding systems, reagent flow meters, and equipment start-up and shutdown sequence of the production line.

[0039] Specific; During the raw material processing stage: The manganese slag (moisture content 22-25%, pH value 6.0-6.5, particle size 5-10cm in lumps) after water washing and pressure filtration is conveyed to the crusher 2 via conveyor belt 1. Conveyor belt 1 uses an 800mm wide high-temperature resistant rubber belt, operates at a speed of 1.2m / s, has a 15° inclination angle, and is equipped with an automatic tensioning device and a deviation detection sensor to ensure stable material conveying. The crusher 2 adopts a double-layer composite structure: the upper layer consists of 500mm diameter high-chromium cast iron rollers with a roller surface hardness of HRC60-65. The roller spacing can be adjusted within the range of 5-20mm via a hydraulic system, with a rotation speed of 300r / min. The rollers compress the lumpy manganese slag into 3-5cm particles. The lower layer is a twin-shaft shredder equipped with 8 sets of tungsten carbide alloy blades, operating at 500r / min, further crushing the loose particles into powder with most particles smaller than 3mm. The crusher shell is made of 304 stainless steel and lined with 10mm thick wear-resistant ceramic, effectively reducing equipment wear.

[0040] First-order reaction stage: The crushed manganese slag is conveyed via a first enclosed conveyor belt 4, which has a fully enclosed metal shell and internal guide plates to prevent material accumulation. The conveyor belt operates at a speed of 0.8 m / s. A first powder batching system 3 adds quicklime powder to the rear of the conveyor belt via a screw feeder. The feeder is frequency-controlled, and the dosage is automatically adjusted according to the acidity of the manganese slag. The material then enters a first drum reaction constant-temperature dryer 5. This equipment is an inclined drum with lifting plates and crushing teeth on the inner wall, rotating at 15 r / min. The operating temperature is controlled at 50-60℃, monitored and adjusted in real-time by a temperature sensor. The material remains in the drum for approximately 20 minutes, completing the initial neutralization reaction (pH rises to 8.0-10.0) and reducing the moisture content to 18-20%.

[0041] Primary rolling and reagent reaction stage: The pre-processed material enters the first enclosed vibrating screen belt roller press 6. This equipment is equipped with a vibrating screen with a 5mm aperture and three 600mm diameter chromium-molybdenum alloy rollers. The roller gaps are 1.5mm, 1.0mm, and 0.5mm respectively. The roller speed is 80r / min (1.3 times the belt speed), and the linear pressure is 300N / mm. A small amount of material larger than 5mm is screened out by the vibrating screen and enters the progressive roller press to further refine the material particles and promote uniform mixing of the material with lime powder.

[0042] After being screened and rolled, the material enters the second enclosed conveyor belt 8. A reagent dispensing system 7 is installed above the conveyor belt. This system consists of three sets of atomizing nozzles, and the spraying volume of the aqueous reagent (containing an aqueous solution of 0.5% curing agent) is precisely controlled by an electromagnetic flow meter. The conveyor belt shell is designed with insulation to maintain the internal temperature at 55°C. A constant temperature reaction is achieved through hot air circulation. During the conveying process, the material completes the neutralization and curing reaction (residence time is about 20 minutes), and ammonia gas begins to be continuously released.

[0043] Secondary crushing and rolling process: The material is conveyed to the first closed transfer conveyor belt 9 via the second closed conveyor belt 8. The secondary crusher 10 receives the material from the first closed transfer conveyor belt 9 and performs secondary fine crushing treatment so that the material mesh size can reach 70-100 mesh. The material is then discharged to the third closed conveyor belt 11.

[0044] After being crushed, the material is fed into the second drum reaction constant temperature dryer 12 via the third enclosed conveyor belt 11.

[0045] The parameters of the second drum reaction constant temperature dryer 12 are as follows: Φ1.6m×15m drum, inclination angle 2°, rotation speed 12r / min, working temperature 60-65℃, material residence time 20 minutes. Through enhanced stirring, the material is fully reacted, and the moisture content is reduced to 13-14%. Then, it enters the second closed vibrating screen belt roller press 13 (structure is the same as the first roller press, roller gap ≦0.3mm), which further reduces the moisture content to below 12% and controls the particle size to about 100 mesh.

[0046] Finished product processing stage: The material after secondary roller pressing enters the fourth enclosed conveyor belt 14, which adopts a chain plate structure, runs at a speed of 0.6 m / s, and maintains an internal temperature of 75°C. By extending the reaction time (approximately 35 minutes), the soluble manganese is fully solidified. A second set of automatic sampling equipment 20 is installed at the end, and the detection indicators include: soluble manganese, ammonia nitrogen, pH value, and moisture content. The detection data is transmitted to the control system in real time.

[0047] If the test results fail to meet the standards (pH < 7.0 or ammonia nitrogen > 50 mg / L), the control system issues a command to reverse the second enclosed transfer conveyor belt 16, returning the material to the crusher 2 for reprocessing. If the test results meet the standards, and the material meets the standards with minimal deviation from the indicators (indicators: soluble manganese ≤ 2 mg / L, ammonia nitrogen ≤ 15 mg / L, pH 7-9, moisture 10-12%), it enters the rapid mixer 17. Stabilizers are added according to the test data (the amount and quantity added vary depending on the test quality), and the mixture is rapidly stirred until homogeneous. The stirred material is then conveyed to the enclosed finished product silo 21 via the fifth enclosed conveyor belt 18. A pulse dust collector (with a processing air volume of 1000 m³ / h) is installed on the top of the silo, and an electric unloading valve (300 mm diameter) is provided at the bottom, allowing direct loading of materials into dump trucks (the bottom of the silo is 4 m above the ground, matching the vehicle height).

[0048] In the ammonia collection system 195, the first and second ammonia water collection tanks have a volume of 50m³ / each and adopt countercurrent absorption with a water pressure of 3m. The water circulation spray tower has a diameter of 2m, a height of 8m, a packing layer height of 3m, and a circulating water volume of 50m³ / h.

[0049] The automated control equipment 23 adopts a Siemens S7-1200 PLC control system and is equipped with a 10-inch touch screen. It can set 10 start-stop sequence modes to avoid material blockage.

[0050] The monorail trolley has a lifting capacity of 2 tons, an operating speed of 0-20m / min, and covers the main equipment area.

[0051] During operation, the production line of this application achieves automated and harmless treatment of manganese slag through the coordinated work of various equipment. The treated manganese slag meets all the standards, and the whole process is environmentally friendly, efficient, and low-cost. The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An environmentally friendly automated production line for the harmless treatment of manganese slag, characterized in that, It includes a pulverizer, a powder batching system, a closed conveyor belt, a first drum reaction constant temperature dryer, a second drum reaction constant temperature dryer, a first closed vibrating screen belt roller press, a second closed vibrating screen belt roller press, a reagent batching system, a secondary pulverizer, a high-speed mixer, a first closed transfer conveyor belt, and a second closed transfer conveyor belt; The enclosed conveyor belt includes a first enclosed conveyor belt, a second enclosed conveyor belt, a third enclosed conveyor belt, a fourth enclosed conveyor belt, and a fifth enclosed conveyor belt; the powder batching system includes a first powder batching system and a second powder batching system; The pulverizer is used to crush the manganese slag after water washing and filter pressing, and discharges it to the first enclosed conveyor belt. The first powder batching system mixes the crushed manganese slag with lime powder and then conveys it to the drum reaction constant temperature dryer. The drum reaction constant temperature dryer controls the temperature, stirs, reacts, and dries the material, and then discharges it to the first enclosed vibrating screen belt roller press. The coarse material larger than 5mm is continuously screened out and then rolled by the belt roller press. It then directly enters the next step with the fine material smaller than 5mm. The reagent batching system evenly sprays the aqueous reagent onto the material on the second enclosed conveyor belt. The second conveyor belt controls the temperature, reacts, and dries the material, and then conveys it to the first enclosed transfer conveyor belt for transfer. The material enters the secondary crusher for secondary crushing and then is discharged to the third enclosed conveyor belt, which transports it to the second drum reaction constant temperature dryer. After secondary constant temperature, stirring, reaction, and drying, it is released to the second enclosed vibrating screen belt roller press. Coarse material ≥3mm is continuously screened out and, after being pressed by the belt roller, it, along with fine material below 3mm, directly enters the next step. After secondary roller pressing, the material is sent to the fourth enclosed conveyor belt for constant temperature reaction and then conveyed to the second enclosed transfer conveyor belt. Materials that meet the standards and those that do not are transferred. Materials that do not meet the standards are returned to the crusher via the second enclosed transfer conveyor belt; materials that meet the standards are mixed with stabilizer and then enter the high-speed mixer for mixing before being discharged.

2. The environmentally friendly automated production line for harmless treatment of manganese slag as described in claim 1, characterized in that: The second enclosed transfer conveyor belt is equipped with a second powder batching system. The second powder batching system adds ingredients or stabilizers to qualified materials according to material detection data, and then the materials enter the high-speed mixer for thorough mixing.

3. The environmentally friendly automated production line for harmless treatment of manganese slag as described in claim 2, characterized in that: After being mixed by the high-speed mixer, the material is discharged to the fifth enclosed conveyor belt, which transports the material to the enclosed finished product silo.

4. The environmentally friendly automated production line for harmless treatment of manganese slag as described in claim 1, characterized in that: The fourth enclosed conveyor belt is equipped with a duct heater, and the duct heater is connected to a Roots blower.

5. The environmentally friendly automated production line for harmless treatment of manganese slag as described in claim 4, characterized in that: The air duct heater heats the 80°C hot air provided by the Roots blower to 120°C through electric heating. 90% of the hot air volume is sent into the air intake at the end of the fourth closed conveyor belt. The direction of the hot air is opposite to the direction of the material. The reverse blowing air enters from the end of the fourth closed conveyor belt and goes to the middle section outlet of the first closed vibrating screen belt roller press.

6. The environmentally friendly automated production line for harmless treatment of manganese slag as described in claim 4, characterized in that: A gas pipeline is provided between the second enclosed vibrating screen belt roller press and the first enclosed conveyor belt. 10% of the hot air volume enters the front section of the first enclosed conveyor belt from the gas pipeline and blows in the same direction, so as to send lime powder into the first drum reaction constant temperature dryer.

7. The environmentally friendly automated production line for harmless treatment of manganese slag as described in claim 6, characterized in that: The first enclosed vibrating screen belt roller press is connected to a pulse dust collector via a pipeline. The pulse dust collector is connected to an induced draft fan, which is connected to an ammonia treatment and collection system.

8. The environmentally friendly automated production line for harmless treatment of manganese slag as described in claim 7, characterized in that: The air volume of the induced draft fan is five times that of the blower, ensuring that ammonia dust will not escape from the pulverizer at the front end of the production line.

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