Electrolytic manganese residue treatment integrated equipment

Abstract

Electrolytic manganese residue treatment integrated equipment comprises a machine frame, a double-shaft stirring machine installed on the machine frame and a shearing and crushing device arranged on the double-shaft stirring machine, the double-shaft stirring machine comprises a stirring bin, a feeding port is formed in the top of one end of the stirring bin, and a discharging port is formed in the bottom of the other end of the stirring bin. The interior of the stirring bin is sequentially divided into a dispersion section and a pretreatment section from a feeding hole to a discharging hole; the top of the stirring bin is provided with a plurality of dosing ports at the connecting position of the dispersion section and the pretreatment section, the stirring bin is provided with at least one air inlet at the position close to the connecting position of the dispersion section and the pretreatment section, and the air inlet of the stirring bin is connected with a fan through a pipeline; and the stirring bin is provided with a tail gas outlet above the discharge port. The device is simple to operate, integrates three functions of dispersion, pretreatment and tail gas recovery, and can realize continuous pretreatment of the plate-shaped electrolytic manganese residues.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic manganese residue processing disposal technical field especially relates to a kind of electrolytic manganese residue disposal integrated equipment. BACKGROUND

[0002] Electrolytic manganese residue is the filter residue generated in the process of electrolytic manganese production, which is produced by leaching of rhodochrosite with sulfuric acid or sulfuric acid leaching of pyrolusite after reduction by roasting, impurity removal and neutralization, etc. The main components are dihydrate gypsum, quartz and clay minerals, containing heavy metals such as Mn²⁺ and ammonia-nitrogen pollutants. However, due to the physicochemical properties of electrolytic manganese residue, the disposal of electrolytic manganese residue is mainly by stacking, and only less than 10% of the resource utilization rate.

[0003] Although the identified electrolytic manganese residue belongs to Class II general industrial solid waste, the introduction of "Manganese Residue Pollution Control Technical Specification" (HJ1241-2022) clearly proposes that the precondition for the resource utilization of electrolytic manganese residue is to pretreat it to meet the pollution control standards of Class I solid waste and related application fields. At the same time, "Electrolytic Manganese Industry Clean Production Evaluation Index System" clearly points out that the harmless disposal rate of electrolytic manganese residue of electrolytic manganese enterprises of I, II and III levels of clean production grade all need to reach 100%, and the resource utilization rate needs to reach 25%, 15% and 5% respectively. Therefore, from the perspective of harmless stacking or resource utilization, electrolytic manganese residue must be pretreated.

[0004] Currently, the main pretreatment processes of electrolytic manganese residue mainly include high-temperature calcination pretreatment of Ningxia Tianyuan Manganese Industry and water washing-alkali harmless pretreatment of other places. The high-temperature calcination pretreatment scheme of Ningxia Tianyuan is simple in process, which is beneficial to subsequent resource utilization, but the calcination temperature is high and the disposal cost is high, which is not suitable for other places. The water washing-alkali harmless pretreatment process mainly involves water washing and harmless parts. The water washing process is mainly completed by modifying the electrolytic manganese production line. The electrolytic manganese residue produced in this process is in the form of plate, with residual heavy metal ions such as Mn²⁺ and ammonia-nitrogen. Therefore, how to realize the dispersion of water-washed electrolytic manganese residue, the stable solidification of heavy metal ions such as Mn²⁺ and the removal of ammonia-nitrogen is the key to the water washing-alkali harmless pretreatment of electrolytic manganese residue.

[0005] For example, patent number CN202222287310.9, titled "A Novel Electrolytic Manganese Slag Pretreatment Device," describes the dispersion of electrolytic manganese slag through crushing and grinding, followed by mixing and pretreatment in a twin-shaft mixing device. However, due to the stickiness of manganese slag, plate-shaped electrolytic manganese slag is difficult to pre-disperse by crushing; crushing only thins the slag, making it impossible to break. The mixing blades mentioned in this patent are two- or three-bladed arc-shaped blades, but this type of blade makes it difficult to achieve a thorough and uniform mixture of electrolytic manganese slag and treatment agents. Another example is patent number CN202020583180.1, titled "An Integrated Manganese Slag Pretreatment Device," which describes achieving uniform mixing and efficient reaction of electrolytic manganese slag and treatment agents through digestion and shredding, while also recovering exhaust gas. However, it is difficult to achieve efficient dispersion of electrolytic manganese slag in this way, resulting in uneven mixing of subsequent reagents and poor pretreatment effect. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by providing an integrated equipment for the disposal of electrolytic manganese slag, which integrates dispersion, pretreatment, and tail gas recovery.

[0007] To achieve the above objectives, this utility model first proposes an integrated equipment for the treatment of electrolytic manganese slag, including a frame, a twin-shaft mixer mounted on the frame, and a shearing and crushing device mounted on the twin-shaft mixer. The discharge port of the shearing and crushing device is connected to the feed port of the twin-shaft mixer. The twin-shaft mixer includes a mixing chamber. A feed port is provided at the top of one end of the mixing chamber, and a discharge port is provided at the bottom of the other end. The mixing shaft is driven to rotate by a motor. The mixing chamber is divided into a dispersion section and a pretreatment section from the feed port to the discharge port. Multiple chemical dosing ports are provided on the top of the pretreatment section (312) of the mixing chamber near the dispersion section. At least one air inlet is provided on the mixing chamber near the connection between the dispersion section and the pretreatment section. A breathable isolation net is sealed on the inner wall of the mixing chamber at the air inlet. The air inlet of the mixing chamber is connected to a blower through a pipeline. An exhaust gas outlet is provided above the discharge port of the mixing chamber. The exhaust gas outlet is connected to an exhaust gas treatment device through an exhaust gas collection pipeline.

[0008] In this embodiment, the mixing shaft of the twin-shaft mixer is provided with a spiral cutter, and the spiral cutter has protrusions evenly arranged on the contact surface with the material.

[0009] In this embodiment, the protrusion is formed by providing a threaded hole on the helical reamer and threading a bolt inside the threaded hole.

[0010] In this embodiment, the protrusions are also evenly arranged on the outer wall of the stirring shaft.

[0011] In the embodiment, a feeding hopper is arranged on the feeding port of the shearing and crushing device, the outlet of the feeding hopper is connected with the inlet of the shearing and crushing device, and a vibrating device is arranged on the feeding hopper.

[0012] In the embodiment, the length of the pretreatment section is greater than that of the dispersion section.

[0013] In the embodiment, the pretreatment section occupies 2 / 3 of the total length in the stirring bin, and the dispersion section occupies 1 / 3 of the total length in the stirring bin.

[0014] In the embodiment, two feeding ports are arranged on the stirring bin, the two feeding ports are arranged along the axial direction of the stirring shaft, atomizing nozzles are arranged in the feeding ports, and the atomizing nozzles are connected with the medicine outlet of the medicine feeding device arranged outside through pipelines.

[0015] With the above structure, the utility model has the following advantages:

[0016] 1. The device is provided with a shearing and crushing device and a double-shaft stirring machine, the plate-shaped electrolytic manganese residue is first sheared into small pieces by the shearing and crushing device, and then the small pieces of the plate-shaped electrolytic manganese residue are further dispersed and sprayed with the disposal reagent by the double-shaft stirring machine, so that the disposal reagent and the electrolytic manganese residue are fully contacted and uniformly mixed, and the ammonia gas generated in the pretreatment process of the electrolytic manganese residue can be recovered.

[0017] 2. The double-shaft stirring machine is provided with a dispersion section and a pretreatment section, the electrolytic manganese residue entering the double-shaft stirring machine first enters the dispersion section, the dispersion section is used for further dispersing the electrolytic manganese residue after shearing, then the dispersed electrolytic manganese residue enters the pretreatment section, the disposal reagent is added in the pretreatment section, the disposal reagent and the electrolytic manganese residue are fully reacted, the cooperation of the gas inlet and the tail gas outlet on the pretreatment section improves the recovery efficiency of the ammonia gas generated in the pretreatment of the stirring bin.

[0018] 3. The pretreatment section of the stirring bin is provided with two feeding ports, the two feeding ports are arranged along the axial direction of the stirring shaft, atomizing nozzles are arranged in the feeding ports, the atomizing nozzles are connected with the outlet of the medicine feeding device arranged outside, the medicine feeding device can realize the quantitative and timed addition of the disposal reagent through a program, the medicine is added during the stirring process, which can promote the full mixing of the disposal reagent and the dispersed electrolytic manganese residue, the two feeding ports realize twice addition, the first addition of the disposal reagent mainly plays the dual roles of dispersing the disposal reagent, solidifying heavy metals and removing ammonia nitrogen, the second addition of the disposal reagent mainly plays the roles of solidifying heavy metals and removing ammonia nitrogen, which promotes the efficient pretreatment of the electrolytic manganese residue, the twice addition of the disposal reagent can better realize the re-dispersion of the electrolytic manganese residue and improve the reaction time of the electrolytic manganese residue and the disposal reagent.

[0019] 4. The outer walls of the spiral cutter and the stirring shaft of this device are uniformly arranged with protrusions on the contact surfaces with the material. When the stirring shaft rotates, the protrusions can further disperse the electrolytic manganese slag. On the other hand, when the reagent is added, the contact between the electrolytic manganese slag and the added reagent is more complete.

[0020] In summary, this invention is simple to operate and provides excellent pretreatment results for electrolytic manganese slag. This device integrates dispersion, pretreatment, and tail gas recovery into one unit, enabling continuous pretreatment of plate-shaped electrolytic manganese slag. The treated slag is a well-dispersed powder or small-particle lumps. Compared to traditional semi-continuous or intermittent treatment processes, it simplifies the treatment process, improves efficiency, and reduces energy consumption, thus achieving efficient, low-energy, and environmentally friendly pretreatment of electrolytic manganese slag. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a top view of the twin-shaft mixer of this utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the stirring shaft of this utility model.

[0024] Figure 4 This is a top view of the shearing and crushing device of this utility model.

[0025] Figure 5 This is a schematic diagram of the blade beam and hydraulic cylinder of this utility model.

[0026] Among them, 1. Feed hopper; 2. Shearing and crushing device; 21. Reciprocating motion mechanism; 22. Cutter head; 23. Blade beam; 24. Hydraulic cylinder; 3. Twin-shaft mixer; 31. Mixing chamber; 311. Dispersion section; 312. Pretreatment section; 32. Exhaust gas outlet; 33. Discharge port; 34. Air inlet; 35. Chemical dosing port; 36. Mixing shaft; 37. Spiral reamer; 38. Protrusion; 4. Exhaust gas collection pipeline. Detailed Implementation

[0027] 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.

[0028] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but must be based on that a person having ordinary skill in the art can realize, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0029] As Figure 1 The utility model discloses an electrolytic manganese residue disposal integrated equipment, including frame, install double shaft mixer 3 on the frame and set up shearing crusher 2 at double shaft mixer 3 feed inlet, install feed inlet on the feed inlet of shearing crusher 2 with feed hopper 1, double shaft mixer 3 includes stirring bin 31, the top of one end of stirring bin 31 is provided with feed inlet, and the bottom of the other end is provided with discharge gate 33, two horizontal arrangements and parallel stirring shafts 36 are installed between discharge gate 33 and feed inlet in stirring bin 31, and the stirring shaft 36 is rotated by motor drive, the stirring bin 31 is divided into dispersion section 311 and pretreatment section 312 in proper order from feed inlet to discharge gate 33, and the length of pretreatment section 312 is greater than dispersion section 311, preferably, pretreatment section 312 occupies 2 / 3 of the total length in stirring bin 31, and dispersion section 311 occupies 1 / 3 of the total length in stirring bin 31.

[0030] The top of stirring bin 31 is provided with a plurality of dosing ports 35 at the connecting position of dispersion section 311 and pretreatment section 312, specifically, two dosing ports are arranged on stirring bin 31, and the two dosing ports are arranged along the axial direction of stirring shaft 36, the dosing port is provided with atomizing nozzle, the atomizing nozzle is connected with the outlet of dosing device arranged outside, the dosing device can realize quantitative and timed addition of disposal medicament through program, and the disposal medicament can be added during stirring, so that the disposal medicament and the dispersed electrolytic manganese residue can be fully mixed.

[0031] With the above structure, the electrolytic manganese residue entering the double-shaft mixer 3 first enters the dispersion section 311, which is used for shearing the electrolytic manganese residue to further disperse the electrolytic manganese residue, and then the dispersed electrolytic manganese residue enters the pretreatment section 312, in which the disposal reagent is added twice to realize the full reaction of the disposal reagent and the electrolytic manganese residue, and the disposal reagent is sprayed by atomizing nozzles. Specifically, the purpose of adding the reagent for the first time is to play the dual roles of dispersion and heavy metal solidification and ammonia-nitrogen removal. The dispersion is mainly realized by the reaction of the disposal reagent and about 25% water contained in the electrolytic manganese residue to release heat, and the heavy metal solidification and ammonia-nitrogen removal are mainly realized by the joint action of the alkaline substances and phosphates contained in the disposal reagent. In the process of adding the reagent for the second time, the purpose of adding the reagent is mainly to play the roles of heavy metal solidification and ammonia-nitrogen removal. In the disposal process, the heavy metals are mainly stabilized and solidified in the form of hydroxides, carbonates, silicates and phosphates, and the ammonia-nitrogen is mainly removed in the form of ammonia gas or is stabilized and solidified in the form of struvite.

[0032] As shown in Figure 1 , a plurality of air inlets 34 are arranged around the stirring bin 31 near the connection position between the dispersion section 311 and the pretreatment section 312, a gas-permeable isolation net is sealingly installed on the inner wall of the stirring bin 31 at the position of the air inlets 34, and the air inlets 34 of the stirring bin 31 are connected with a fan through a pipeline; the stirring bin 31 is provided with a tail gas outlet 32 above the discharge outlet 33, and the tail gas outlet 32 is connected with a tail gas treatment device through a tail gas collection pipeline 44. The tail gas treatment device can recover the ammonia gas generated in the pretreatment in the stirring bin 31. The tail gas generated in the reaction is discharged through the cooperation of the air inlets 343 and the tail gas outlet 32, the air inlets 343 can introduce ordinary air or air heated to 40-60°C to promote the discharge of the tail gas, and the discharged tail gas is introduced into the tail gas treatment device through the tail gas collection pipeline 4 for treatment. The tail gas treatment device can use a supersaturated ammonium salt solution, and the tail gas is introduced into the supersaturated ammonium salt solution to make the ammonia gas recrystallize to prepare ammonium salt.

[0033] As shown in Figure 3 , the spiral reamer 37 on the stirring shaft 36 of the double-shaft mixer 3 adopts an arc-shaped reamer, and the spiral reamer 37 and the outer wall of the stirring shaft 36 are uniformly provided with protrusions 38 on the material contact surface. When the stirring shaft 36 rotates, the protrusions 38 can further disperse the electrolytic manganese residue, so that the electrolytic manganese residue and the added reagent can be more fully contacted. Further, the protrusions 38 are formed by providing threaded holes on the spiral reamer 37 and screwing bolts in the threaded holes.

[0034] As shown in Figure 4 , 5As shown, the shearing crushing device 2 is provided with a feeding port at the top, and a feeding hopper 1 is installed on the feeding port, so that the plate-shaped electrolytic manganese residue can enter the device conveniently, the shearing crushing device 2 comprises a reciprocating mechanism 21 and a sawtooth cutter, two groups of sawtooth cutters with the blade ends of the cutter heads arranged between the feeding port and the discharging port of the shearing crushing device 2 are arranged, and a gap for the plate-shaped electrolytic manganese residue to enter is arranged between the two groups of sawtooth cutters, one group of sawtooth cutters is driven by the reciprocating mechanism 21 to move relative to the other group of sawtooth cutters, so that the vertical shearing is realized, the sawtooth cutter is composed of a plurality of parallel arranged blade beams 23, one end of the blade beam 23 is connected with the piston end of an oil cylinder 24, and a cutter head 22 is installed on the other end, the cutter head 22 is provided with a blade in the horizontal direction and the vertical direction, the oil cylinder 24 is fixed on the rack, the oil cylinder 24 drives the blade beam 23 to move along the length direction, the two groups of sawtooth cutters are driven to move close to or away from each other by the oil cylinder 24, so that the horizontal shearing is realized, the shearing crushing device 2 realizes the shearing action of the plate-shaped electrolytic manganese residue through the relative movement of the two groups of sawtooth cutters in the vertical and horizontal directions, and the shearing action of the shearing crushing device 2 is simulated by a pair of scissors, a valve is arranged at the bottom discharging port 33 of the shearing crushing device 2, the valve is opened after the electrolytic manganese residue is sheared, and the sheared electrolytic manganese residue enters the stirring bin 31. Further, the plate-shaped manganese residue can enter the feeding hopper 1 through the lifting hopper or the belt, the height of the outlet of the feeding hopper 1 is slightly larger than the thickness of the plate-shaped electrolytic manganese residue, the plate-shaped electrolytic manganese residue can enter the shearing crushing device 2 vertically through vibration, the shearing crushing device 2 realizes the efficient shearing and dispersion of the plate-shaped manganese residue through the arrangement of the bidirectional sawtooth structure, and can realize multiple shearing and crushing, so that the phenomenon that the electrolytic manganese residue paste exists on the blade of the roller type crushing equipment is avoided.

[0035] The working principle of the utility model is as follows:

[0036] Firstly, the plate-shaped electrolytic manganese residue from the water washing and pressure filtration of electrolytic manganese production enterprises is directly transported to the hopper of the shearing and crushing device 2 through a bucket or a belt. Then, the plate-shaped electrolytic manganese residue in the hopper enters the shearing and crushing device 2 vertically by the vibration device of the hopper, and the shearing and crushing device 2 is used to realize the primary shearing and crushing of the plate-shaped electrolytic manganese residue. Next, the electrolytic manganese residue subjected to the primary shearing and crushing enters the double-shaft mixer 3 at the lower end through the intermittent valve at the lower end of the shearing and crushing device 2. The front section of the double-shaft mixer 3 is a dispersion section 311, which can realize further dispersion of the sheared electrolytic manganese residue. The double-shaft mixer 3 simultaneously pushes the dispersed electrolytic manganese residue forward under the action of the spiral reamer 37 during the stirring process. The rear section of the double-shaft mixer 3 is provided with a dosing port 35, an air inlet 34 and a tail gas outlet 32 to form a pretreatment section 312. The dosing port 35 adds treatment reagents by spraying and two-step adding. The first treatment reagent mainly plays a role of dispersing the treatment reagent and solidifying heavy metals and removing ammonia nitrogen. The second treatment reagent mainly plays a role of solidifying heavy metals and removing ammonia nitrogen, so as to promote efficient pretreatment of the electrolytic manganese residue. The electrolytic manganese residue subjected to the treatment is output through the discharge port 33. The ammonia gas generated during the stirring process is promoted to be discharged from the tail gas outlet 32 by introducing normal air or air heated to 40-60 DEG C into the air inlet hole. The discharged tail gas can be introduced into a supersaturated ammonium salt solution to prepare ammonium salt by recrystallization of ammonia gas.

[0037] Through the above steps, the plate-shaped electrolytic manganese residue can be effectively highly dispersed, the utilization value thereof is improved, and the influence on the environment is reduced. The device can also add automatic control equipment to realize the regulation and control of the feeding speed, the shearing speed, the stirring speed, the air flow, the reagent addition amount and the reagent addition ratio.

[0038] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. An integrated equipment for treating electrolytic manganese slag, characterized in that: The system includes a frame, a twin-shaft mixer (3) mounted on the frame, and a shearing and crushing device (2) mounted on the twin-shaft mixer (3). The discharge port (33) of the shearing and crushing device (2) is connected to the feed port of the twin-shaft mixer (3). The twin-shaft mixer (3) includes a mixing chamber (31). The top of one end of the mixing chamber (31) is provided with a feed port, and the bottom of the other end is provided with a discharge port (33). The mixing chamber (31) is divided into a dispersion section (311) and a pretreatment section (312) that are connected to each other from the feed port to the discharge port (33). The mixing chamber (31) has multiple dosing ports (35) on the top of the pretreatment section (312) near the dispersion section (311). The mixing chamber (31) has at least one air inlet (34) near the connection between the dispersion section (311) and the pretreatment section (312). The air inlet (34) of the mixing chamber (31) is connected to the blower through a pipeline. The mixing chamber (31) has a tail gas outlet (32) above the discharge port (33). The tail gas outlet (32) is connected to the tail gas treatment device through the tail gas collection pipeline (4).

2. The integrated equipment for treating electrolytic manganese slag according to claim 1, characterized in that: The twin-shaft mixer (3) has a spiral cutter (37) on its mixing shaft (36), and the spiral cutter (37) has protrusions (38) evenly arranged on the contact surface with the material.

3. The integrated equipment for treating electrolytic manganese slag according to claim 2, characterized in that: The protrusion (38) is formed by providing a threaded hole on the spiral reamer (37) and threading a bolt inside the threaded hole.

4. The integrated equipment for treating electrolytic manganese slag according to claim 2, characterized in that: The protrusions (38) are evenly arranged on the outer wall of the stirring shaft (36).

5. The integrated equipment for treating electrolytic manganese slag according to claim 1, characterized in that: The shearing and crushing device (2) is equipped with a feed hopper (1) at its feed inlet, and the outlet of the feed hopper (1) is connected to the feed inlet of the shearing and crushing device (2). A vibration device is installed on the feed hopper (1).

6. The integrated equipment for treating electrolytic manganese slag according to claim 1, characterized in that: The length of the preprocessing section (312) is greater than that of the dispersing section (311).

7. The integrated equipment for treating electrolytic manganese slag according to claim 6, characterized in that: The pretreatment section (312) occupies 2 / 3 of the total length of the mixing chamber (31), and the dispersion section (311) occupies 1 / 3 of the total length of the mixing chamber (31).

8. The integrated equipment for treating electrolytic manganese slag according to claim 1, characterized in that: The mixing chamber (31) is provided with two feeding ports, which are arranged axially along the mixing shaft (36). The feeding ports are equipped with atomizing nozzles, which are connected to the outlet of a drug delivery device installed in the outside through a pipeline.

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