Complete equipment for treating red mud

Abstract

The invention discloses red mud treatment complete equipment, which is sequentially provided with a batching device, a red mud stirrer, a granulator, a solid phase reactor, a pulverizer and a magnetic separator from front to back, the red mud stirrer comprises a rack, the rack is provided with a charging barrel, the rack is provided with a stirring shaft, the stirring shaft is provided with a cooling channel, and the cooling channel is communicated with the charging barrel. The stirring shaft is provided with a liquid inlet channel and a liquid outlet channel which can be communicated with the outer surface of the stirring shaft and the cooling channel, the rack is provided with a first liquid containing cavity which surrounds the stirring shaft and is communicated with the liquid inlet channel, the rack is provided with a liquid inlet which can be communicated with the first liquid containing cavity and the outside, and the rack is provided with a second liquid containing cavity which surrounds the stirring shaft and is communicated with the liquid outlet channel. The rack is provided with a liquid outlet capable of communicating the second liquid containing cavity with the outside. The red mud treatment device can realize full stirring and deep reduction for red mud treatment, so that the red mud treatment effect is ensured.

Description

Technical Field

[0001] This invention relates to the field of red mud reduction equipment technology, specifically to a complete set of red mud treatment equipment. Background Technology

[0002] Red mud is a highly alkaline solid waste generated during alumina production, and its large-scale stockpiling poses a serious threat to the environment and safety. Red mud contains a large amount of iron, aluminum, and sodium oxides. Recovering valuable elements such as iron, aluminum, and titanium through reduction smelting or solid-state reduction is an important direction for the current resource utilization of red mud.

[0003] Chinese invention patent application number 2024102608388 discloses a red mud dealkali removal device and method, belonging to the field of red mud dealkali removal technology. The red mud dealkali removal device includes: a base, a hollow cylindrical mixer, a feeding unit, and a discharging unit; the mixer is mounted on the base and is divided into three continuous parts from top to bottom: a feeding zone, a stirring zone, and a discharging zone; a red mud inlet is provided at the top of the feeding zone, and multiple water inlets are located on the side wall of the feeding zone, with the direction of the water inlets tangential to the side wall of the mixer, all either left-handed or right-handed; the stirring zone is a straight cylinder with the same inner diameter at the top and bottom; a discharge port is provided at the center of the bottom of the discharging zone; a reflux plate is provided above the discharging zone inside the mixer. In this invention, water enters the mixer, forming a rotating flow state, and red mud powder is thrown from the top of the container into the rotating water flow, achieving preliminary mixing; the reflux plate forces the alkali solution to flow out from around the reflux plate to ensure that the red mud powder and water are fully mixed, improving mixing efficiency. Because it does not use stirring blades, it avoids the need for repeated disassembly and reassembly of the transmission device.

[0004] The applicant provides a red mud treatment process that uses high-temperature dealkali pre-reduction + high-temperature deep reduction melting to achieve efficient dealkali removal and iron reduction separation, thereby enabling deep treatment and utilization of red mud. Furthermore, it utilizes the porous properties of ceramsite for solid-phase high-temperature reduction. However, there is no existing equipment to realize the above process. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a complete set of equipment for red mud treatment that achieves thorough stirring and deep reduction for red mud treatment.

[0006] To solve the aforementioned technical problems, the complete set of red mud treatment equipment includes, from front to back, a batching device, a red mud mixer, a granulator, a solid-phase reactor, a grinding mill, and a magnetic separator. The red mud mixer includes a frame with a rotatable material cylinder. The material cylinder has an openable cover at its upper part. The frame has two rotating stirring shafts that can extend into the material cylinder. A discharge port is located at the bottom of the material cylinder's inner cavity. The stirring shafts are characterized by having several vertically spaced stirring blades that ensure thorough mixing of the red mud slurry. Among the two stirring shafts... At least one stirring shaft is provided with a cooling channel located inside the stirring shaft. The stirring shaft is provided with a liquid inlet channel and a liquid outlet channel that connect the outer surface of the stirring shaft to the cooling channel. The frame is provided with a first liquid-containing chamber surrounding the stirring shaft and connecting to the liquid inlet channel. The frame is provided with a liquid inlet that connects the first liquid-containing chamber to the external environment. The frame is provided with a second liquid-containing chamber surrounding the stirring shaft and connecting to the liquid outlet channel. The frame is provided with a liquid outlet that connects the second liquid-containing chamber to the external environment. The first liquid-containing chamber and the second liquid-containing chamber are spaced apart axially from each other on the stirring shaft.

[0007] An anti-wrapping ring is provided in the gap between two adjacent stirring blade layers. The anti-wrapping ring is fitted on the stirring shaft and abuts against the stirring blade layer located below the two adjacent stirring blade layers. The anti-wrapping ring and the outer surface of the stirring shaft are spaced apart in the radial direction of the stirring shaft.

[0008] The stirring blade layer includes two stirring blades mounted on the stirring shaft, with the two stirring blades facing each other in the radial direction of the stirring shaft.

[0009] The outer ends of the two agitators in the agitator layer are provided with agitators extending in the vertical direction. When the number of agitators with agitators is greater than one, the two adjacent agitators are opposite each other in the vertical direction and are spaced apart in the vertical direction. When the agitators reach a position close to the inner wall of the barrel under the rotation of the agitator shaft, the agitators can scrape off the red mud slurry on the inner wall of the barrel.

[0010] Two agitators in a layer of agitators located below the agitator shaft are provided with an irregularly shaped agitator frame. The irregularly shaped agitator frame includes a downwardly extending longitudinal extension, and the lower part of the longitudinal extension is provided with a horizontal extension extending radially along the agitator shaft and outward from the material barrel.

[0011] The frame is provided with a hinge shaft, and a scraper is hinged to the frame via the hinge shaft. The scraper is located inside the material cylinder and its bottom is close to the bottom of the material cylinder cavity. The frame is provided with a drive unit for driving the hinge shaft to rotate. The side of the scraper away from the hinge shaft can move closer to and further away from the discharge port at the bottom of the material cylinder cavity after the scraper swings.

[0012] The solid-phase reactor includes a cylindrical body and a feed inlet. The feed inlet is inclined downwards, with its upper and lower sides located outside and inside the cylindrical body, respectively. The inner wall of the cylindrical body is provided with a number of protrusions, which are spaced apart along the circumference of the cylindrical body. The inner sidewalls of the protrusions protrude into the cylindrical body. A flow-stabilizing section that bends outwards is provided on the side of the cylindrical body near the feed inlet. A number of feed-following belts are arranged around the inner sidewall of the flow-stabilizing section, which are inclined downwards from the side near the feed inlet to the side away from the feed inlet.

[0013] The flow stabilization section includes a flared section and a constricted section, which are connected axially in the cylinder. The distance between the constricted section and the feed inlet is greater than the distance between the flared section and the feed inlet. The diameter of the flared section gradually increases from the side closer to the feed inlet to the side farther away from the feed inlet, and the diameter of the constricted section gradually decreases from the side closer to the feed inlet to the side farther away from the feed inlet. The minimum diameter of the flared section and the constricted section is adapted to the inner wall diameter of the cylinder.

[0014] The inner wall of the protrusion is arc-shaped and protrudes into the cylinder. The protrusion extends along the axial direction of the cylinder. Several protrusions are distributed at equal intervals along the circumference of the cylinder.

[0015] The side of the feed belt away from the flow stabilization section is located between two adjacent protrusions in the circumferential direction of the cylinder.

[0016] With the above structure, the present invention has the advantages of reasonable structure and efficient mixing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one structure of the present invention; Figure 2 This is a schematic diagram of the structure of a red mud mixer in one embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of a portion of area A in the middle; Figure 4 yes Figure 2 Enlarged view of a section in area B; Figure 5 yes Figure 2 A schematic diagram of the structure projected along direction C; Figure 6 This is a top view of the structure of the present invention; Figure 7 yes Figure 6 A schematic diagram showing the scraper in use; Figure 8 yes Figure 2 A schematic diagram of the structure of the stirring shaft, stirring blades, stirring plates, irregularly shaped stirring frame and scraper; Figure 9 yes Figure 8 A schematic diagram of the structure viewed in section DD; Figure 10 yes Figure 9 A schematic diagram of the structure of the stirring paddle in the image; Figure 11 yes Figure 10 A schematic diagram of the structure projected along direction E; Figure 12 This is a top view of the structure of the stirring paddle located at the top of the stirring shaft; Figure 13 yes Figure 12 A schematic diagram of the structure projected along the F direction; Figure 14 This is a schematic diagram of the structure of a solid-phase reactor in one embodiment of the present invention; Figure 15 yes Figure 14 A schematic diagram of the structure viewed in section along line GG; Figure 16 yes Figure 15 A structural diagram in use; Figure 17 yes Figure 15 A structural diagram in use; Figure 18 This is a structural schematic diagram of the protruding part. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention and therefore showing only the components relevant to the invention. For ease of understanding, Figure 1 The top part is the top part of the invention. Figure 1 The following is the lower part of the invention.

[0019] Reference Figure 1 The red mud treatment equipment provided by this invention includes, in sequence from front to back, a batching device, a red mud mixer, a granulator, a solid-phase reactor, a grinding mill, and a magnetic separator. The batching device includes a conveying hopper, a box-type feeder, and a conveyor belt, which can accurately and quantitatively convey various materials to the red mud mixer. The granulator can be a disc granulator or an extrusion granulator as claimed by the applicant. The grinding mill and magnetic separator can both be grinding mills and magnetic separators with corresponding structures in the prior art. The various machines in the prior art described above are not described in detail here.

[0020] Reference Figures 2 to 5As shown, the red mud mixer of this invention includes a frame 1, a rotatable material cylinder 2, an openable cylinder cover 3 on the upper part of the material cylinder 2, and two rotating stirring shafts 4 that can extend into the material cylinder 2. A commercially available twin-shaft mixer can be used, such as the patented product with authorization announcement number CN101879752B. The rotation of the two stirring shafts 4 and the material cylinder 2 ensures uniform mixing of the materials. The stirring shafts 4 have several vertically spaced stirring blades 5 that ensure thorough mixing of the red mud slurry. A discharge port is located at the bottom of the inner cavity of the material cylinder 2. At least one of the two stirring shafts 4 has a cooling channel 41 located inside the stirring shaft 4. The stirring shaft 4 has an inlet channel 42 and an outlet channel 43 that connect the outer surface of the stirring shaft 4 to the cooling channel 41. The cooling channel 41 is approximately U-shaped, and the inlet channel 42 and the outlet channel 43 connect to both sides of the cooling channel 41, respectively. The frame 1 has a first liquid-containing chamber 11 surrounding the stirring shaft 4 and connected to the liquid inlet channel 42. The first liquid-containing chamber 11 surrounds the upper part of the stirring shaft 4, and the first liquid-containing chamber 11 and the outer surface of the upper part of the stirring shaft 4 form a closed space. The frame 1 has a liquid inlet 12 that connects the first liquid-containing chamber 11 to the external environment. An external container carrying cooling liquid can be pumped to the liquid inlet 12 through a pump and pipeline. The cooling liquid can be cooling water or cooling oil. The frame 1 has a second liquid-containing chamber 13 surrounding the stirring shaft 4 and connected to the liquid outlet channel 43. The frame 1 has a liquid outlet 14 that connects the second liquid-containing chamber 13 to the external environment. The first liquid-containing chamber 11 and the second liquid-containing chamber 13 are spaced apart axially along the stirring shaft 4. The second liquid-containing chamber 13 surrounds the upper part of the stirring shaft 4 and is vertically spaced from the first liquid-containing chamber 11. The second liquid-containing chamber 13 and the outer surface of the upper part of the stirring shaft 4 form a closed space. In the frame 1, the first liquid chamber 11 can be surrounded by a hollow sleeve, an upper mounting seat, and a lower mounting seat on the frame 1 to form an annular cavity around the outer surface of the stirring shaft 4. The hollow sleeve is fixed to the overall frame in the frame 1. The upper mounting seat and the lower mounting seat are respectively fixed to the upper and lower sides of the hollow sleeve and seal the upper and lower sides of the hollow sleeve. The upper mounting seat and the lower mounting seat are respectively provided with bearings for rotatably connecting the stirring shaft 4. The stirring shaft 4 passes through the upper mounting seat and the lower mounting seat from top to bottom. The second liquid chamber 13 can be made by milling on the upper mounting seat. The liquid inlet 12 and the liquid outlet 14 are also provided on the upper mounting seat and made by milling or drilling.

[0021] Reference Figures 2 to 12The stirring blade layer 5 includes two stirring paddles 51 mounted on the stirring shaft 4, with the two stirring paddles 51 facing each other radially on the stirring shaft 4. By setting two opposing stirring paddles 51, the mixing effect of the red mud slurry is ensured, and the stirring shaft 4 is subjected to uniform force during rotation, thereby ensuring thorough mixing of the red mud slurry. Several vertically adjacent stirring blade layers 5 form a group, and these stirring blade layers 5 are staggered around the stirring shaft 4. In this embodiment, three vertically adjacent stirring blade layers 5 form a group, and the three stirring blade layers 5 are staggered from top to bottom around the stirring shaft 4 at an angle of 60 degrees, that is, the central angle between two adjacent stirring paddles 51 and the axis of the stirring shaft 4 is approximately 60 degrees. The several circumferentially staggered stirring blade layers 5 in each group of stirring blade layers 5 ensure the mixing effect of the red mud slurry, and the stirring blade layers 5 thoroughly mix the red mud slurry when the stirring shaft 4 rotates.

[0022] Reference Figures 2 to 12 The outer ends of the two agitator blades 51 in the agitator layer 5 are provided with agitator plates 511 extending in the vertical direction. When the number of agitator blade layers 5 with agitator plates 511 is greater than one, the two adjacent agitator plates 511 are opposite each other in the vertical direction and are spaced apart in the vertical direction. After the agitator plates 511 reach a position close to the inner wall of the material cylinder 2 driven by the rotation of the agitator shaft 4, the agitator plates 511 can scrape off the red mud slurry on the inner wall of the material cylinder 2. The agitator plates 511 can be made of polyurethane board. By setting up a stirring plate 511, the stirring plate 511 can scrape off the red mud slurry on the inner wall of the barrel 2 after reaching a position close to the inner wall. The small distance between the stirring plate 511 and the inner wall of the barrel 2 effectively scrapes off the red mud slurry, thereby reducing the adhesion of the red mud slurry to the inner wall of the barrel 2 and removing the initial adhesion layer. When the stirring shaft 4 rotates, the stirring plate 511 generates high-strength shear lines, specifically cutting and tearing the lumpy materials in the red mud slurry, ensuring thorough mixing of the red mud slurry. The outer surface of the stirring paddle 51 is coated with Teflon or wear-resistant ceramic sheets. By setting up the Teflon coating and wear-resistant ceramic sheets, the adhesion of red mud slurry to the stirring paddle 51 can be reduced.

[0023] Reference Figures 2 to 12An anti-clogging ring 6 is provided in the gap between two adjacent stirring blade layers 5. The anti-clogging ring 6 is fitted on the stirring shaft 4 and abuts against the lower stirring blade layer 5 of the two adjacent stirring blade layers 5. The anti-clogging ring 6 and the outer surface of the stirring shaft 4 are spaced apart in the radial direction of the stirring shaft 4. The anti-clogging ring 6 can be made of metal chain or metal ring. By setting the anti-clogging ring 6, when the stirring shaft 4 rotates, the anti-clogging ring 6 can shake on the stirring shaft 4. The shaking anti-clogging ring 6 generates friction and impact on the outer surface of the stirring shaft 4, breaking up the red mud slurry adhering between the two stirring blade layers 5 of the stirring shaft 4, and also ensuring the mixing effect of the red mud slurry in the narrow space, avoiding the formation of mixing dead zones. The two stirring blades 51 in one of the stirring blade layers 5 located below the stirring shaft 4 are provided with an irregularly shaped stirring frame 7. The irregularly shaped stirring frame 7 includes a downwardly extending longitudinal extension, and the lower part of the longitudinal extension has a horizontal extension extending radially along the stirring shaft 4 and outward of the material cylinder 2. The irregularly shaped stirring frame 7 is roughly L-shaped. By setting up the irregularly shaped stirring frame 7, the red mud slurry in the lower part of the material cylinder 2 is fully stirred, reducing the accumulation and uneven mixing of the red mud slurry in the lower part of the material cylinder 2. When the red mud slurry is discharged from the discharge port, the irregularly shaped stirring frame 7 can break up arches, ensuring the smooth discharge of the red mud slurry. Preferably, the horizontal extension is provided with a scraper 8, the bottom of the scraper 8 being close to the bottom of the inner cavity of the material cylinder 2. By setting up the scraper 8, the accumulation of red mud slurry at the bottom of the inner cavity of the material cylinder 2 can be reduced when the stirring shaft 4 rotates, further reducing the adhesion of red mud slurry in the material cylinder 2.

[0024] Reference Figure 2 , Figures 6 to 13 The frame 1 is equipped with a hinge shaft, through which a scraper 9 is hinged. The hinge shaft is rotatably connected to the frame 1 via bearings, and the scraper 9 is fixed to the lower part of the hinge shaft. The scraper 9 is located inside the material cylinder 2, with its bottom near the bottom of the inner cavity of the material cylinder 2. The frame 1 is equipped with a drive component for rotating the hinge shaft. The drive component includes a power cylinder and a connecting rod. The power cylinder can be a hydraulic cylinder or a pneumatic cylinder. The cylinder body of the power cylinder is hinged to the frame 1, and one end of the connecting rod is hinged to the hinge shaft, while the other end is hinged to the output end of the power cylinder. The extension and retraction of the output end of the power cylinder causes the connecting rod to swing, thereby rotating the hinge shaft. The side of the scraper 9 away from the hinge shaft can move closer to or further away from the discharge port at the bottom of the inner cavity of the material cylinder 2 after the scraper 9 swings. By setting scraper 9, after unloading is completed, the drive unit drives the hinge shaft to rotate. The rotation of the hinge shaft causes scraper 9 to swing to the side of scraper 9 away from the hinge shaft and close to the unloading port. Then the material cylinder 2 rotates, and scraper 9 can contact and scrape off the residual red mud slurry at the bottom of the inner cavity of material cylinder 2. The scraped red mud slurry can flow to the position close to the unloading port under the obstruction of scraper 9, reducing the residue of red mud slurry in material cylinder 2 after unloading.

[0025] Reference Figure 12 , Figure 13The agitator 51, located in at least one agitator blade layer 5 on the upper part of the agitator shaft 4, is provided with an inclined surface 512. The inclined surface 512 generates a downward vortex in the upper part of the red mud slurry when the agitator 51 agitates the red mud slurry. By providing the inclined surface 512, the agitator 51 with the inclined surface 512 generates a spiral downward vortex in the red mud slurry when the agitator shaft 4 rotates, thereby entraining light materials floating on the surface of the red mud slurry, ensuring uniform mixing, and thus ensuring thorough agitation of the red mud slurry. The inclined surface 512 is located at the bottom of the agitator 51, and the distance between the inclined surface 512 and the top surface of the agitator 51 gradually decreases in the rotation direction of the agitator shaft 4. When the agitator shaft 4 rotates, the inclined surface 512 provides a downward thrust to the red mud slurry, thereby generating a downward vortex in the upper part of the red mud slurry. (Refer to...) Figure 9 , Figure 10 The agitator 51 located in the middle and lower part of the agitator shaft 4 can also be provided with an inclined surface 512. The inclined surface 512 of the agitator 51 located in the middle and lower part of the agitator shaft 4 is located on the top surface of the agitator 51 and is vertically opposite to the inclined surface 512 of the agitator 51 located in the upper part of the agitator shaft 4. The distance between the inclined surface 512 of the agitator 51 located in the middle and lower part of the agitator shaft 4 and the bottom surface of the agitator 51 gradually decreases in the rotation direction of the agitator shaft 4. This arrangement makes the red mud slurry have a downward vortex at the top and an upward vortex at the middle and lower parts during mixing. The convection formed in this way further ensures the uniformity of mixing.

[0026] When this red mud mixer is in use, the rotating stirring shaft 4 drives the stirring blades 5 to stir the red mud slurry in the mixing cylinder 2. While the stirring shaft 4 is rotating, cooling liquid is pumped from the external container to the inlet 12. Then, the cooling liquid enters the first liquid chamber 11 from the inlet 12. Since the first liquid chamber 11 surrounds the stirring shaft 4 and is connected to the inlet channel 42, the cooling liquid can continuously reach the inlet channel 42 from the first liquid chamber 11 while the stirring shaft 4 is rotating. Then, the cooling liquid reaches the cooling channel 41 from the inlet channel 42 and cools the stirring shaft 4, reducing the hardening and adhesion of the red mud slurry on the surface of the stirring shaft 4 caused by high temperature. At the same time, it can also slightly cool the red mud slurry, further reducing the hardening and adhesion of the red mud slurry on the surface of the stirring shaft 4 caused by high temperature, thereby reducing the adhesion phenomenon of the red mud slurry during stirring and ensuring that the red mud slurry is fully stirred. After passing through the cooling channel 41 and being heated, the cooling liquid reaches the outlet channel 43 from the cooling channel 41. Since the second liquid chamber 13 surrounds the stirring shaft 4 and is connected to the outlet channel 43, the cooling liquid is continuously output from the cooling channel 41 and the outlet channel 43 to the second liquid chamber 13 when the stirring shaft 4 rotates. The cooling liquid in the second liquid chamber 13 reaches the external liquid recovery device through the outlet 14.

[0027] Reference Figures 14 to 17The solid-phase reactor includes a cylindrical body 101 and a feed inlet 102. The feed inlet 102 is inclined downwards from left to right, with its upper and lower sides located outside and inside the cylindrical body 101, respectively. The feed inlet 102 can be mounted on an external feed support. The cylindrical body 101 can be supported by an external drive device and rotated under its drive. The external drive device can be a motor-gear drive mechanism and several support wheel sets. A gear ring can be provided on the outer surface of the cylindrical body 101 to mesh with the gear. The gear meshes with the gear ring and drives the cylindrical body 101 to rotate under the drive of the motor. The support wheel sets provide reliable rolling support for the cylindrical body 101. During use, the cylindrical body 101 can be slightly inclined downwards from left to right to facilitate the movement of materials within the rotating cylindrical body 101. The inner wall of the cylinder 101 is provided with several protrusions 103, which are spaced apart circumferentially along the cylinder 101. The inner sidewalls of these protrusions 103 protrude into the cylinder 101. The protrusions 103 can be prefabricated, and their bottoms can have mounting grooves. The inner wall of the cylinder 101 can have mounting protrusions that mate with the mounting grooves. After the protrusions 103 are engaged with the inner wall of the cylinder 101 via the mounting grooves and mounting protrusions, they can be fastened to the cylinder 101. The cylinder 101 can rotate in both forward and reverse directions under the drive of an external drive device. Optionally, the inner wall of the feed inlet 102 is provided with a refractory layer. The refractory layer can be made of commercially available refractory materials, depending on the temperature inside the cylinder 101. The refractory layer ensures the continuous use of the feed inlet 102 in high-temperature environments.

[0028] Reference Figures 14 to 17 The inner wall of the protrusion 103 is arc-shaped, protruding into the cylinder 101, and extends axially along the cylinder 101. By setting the arc-shaped inner wall of the protrusion 103, the material can move stably on the inner wall of the protrusion 103 when the cylinder 101 rotates, reducing the impact of the inner wall of the protrusion 103 on the material and ensuring the integrity of the material when moving on the inner wall of the protrusion 103; the extension direction of the protrusion 103 ensures that the material is in stable contact with the inner wall of the protrusion 103 when reacting within the rolling cylinder 101. Several protrusions 103 are evenly distributed circumferentially around the cylinder 101. By setting the evenly distributed protrusions 103, the space within the cylinder 101 is utilized efficiently, and the tumbling effect on the material is ensured. Five protrusions 103 can be evenly distributed circumferentially around the cylinder 101. The junction between the inner wall of the protrusion 103 and the inner wall of the cylinder 101 is transitioned by a rounded corner. By setting rounded corners to reduce stress concentration, materials can move smoothly between the inner wall of the cylinder 101 and the inner side wall of the protrusion 103.

[0029] Reference Figures 14 to 17A flow-stabilizing section 111, bent outwards, is provided on the side of the cylinder 101 near the feed inlet 102. The flow-stabilizing section 111 includes a flared section and a constricted section, which are connected axially along the cylinder 101. The distance between the constricted section and the feed inlet 102 is greater than the distance between the flared section and the feed inlet 102, and the flared section is closer to the feed inlet 102 than the constricted section. The diameter of the flared section gradually increases from the side near the feed inlet 102 to the side away from the feed inlet 102, while the diameter of the constricted section gradually decreases from the side near the feed inlet 102 to the side away from the feed inlet 102. The minimum diameter of both the flared and constricted sections is adapted to the inner wall diameter of the cylinder 101. By providing the flared and constricted sections, the outwardly bent flow-stabilizing section 111 is formed, and its cross-section is approximately V-shaped, ensuring reliable material containment. The cross-section of the flow stabilizing section 111 can also be an outwardly bent and convex arc shape; the flared section and the narrowed section stabilize the hot air velocity on the side of the cylinder 101 near the feed inlet 102, which has a larger overall inner diameter, and reduces the situation where hot air with excessively high velocity carries material from the feed inlet 102 back outward from the feed inlet 102.

[0030] Reference Figures 14 to 17 The inner wall of the flow stabilization section 111 is provided with several feed belts 104, which are inclined downwards from the side near the feed inlet 102 to the side away from the feed inlet 102. The cylinder 101 as a whole includes an outer shell and a concrete layer located inside the outer shell. The feed belts 104 can be made of concrete and are integrally formed with the concrete layer of the cylinder 101. The feed belts 104 are located at the flow stabilization section 111 of the cylinder 101. The feed belts 104 twist inwards or outwards from the side near the feed inlet 102 to the side away from the feed inlet 102, as shown in the figure. Figure 1 and Figure 3The conveyor belt 104 twists outward from top to bottom towards the outside of the cylinder 101. By setting the conveyor belt 104 to twist, the overall area of ​​the conveyor belt 104 is increased, ensuring effective material movement on the conveyor belt 104. The twisted shape of the conveyor belt 104 gives it an irregular curved surface. Compared to a regular curved surface with constant curvature, the material's direction of movement on the irregular curved surface of the conveyor belt 104 before reaching the inner wall of the protrusion 103 is not unique, allowing for sufficient tumbling. The length of the conveyor belt 104 in the axial direction of the cylinder 101 is adapted to the length of the flow stabilizing section 111 in the axial direction of the cylinder 101. By setting the length of the conveyor belt 104 in the axial direction of the cylinder 101, when the cylinder 101 rotates, it is ensured that the material can accurately move on the conveyor belt 104 to the part of the cylinder 101 away from the flow stabilizing section 111. The guide belt 104, located away from the flow stabilizing section 111, lies between two adjacent protrusions 103 on the circumferential side of the cylinder 101. The guide belt 104 guides the material before it reaches the inner wall of the protrusions 103, ensuring a reasonable overall material path as the cylinder 101 rotates, further guaranteeing material integrity, and serving a dual function of preventing adhesion and guiding flow. The flow stabilizing section 111 and the guide belt 104 are located between the feed inlet 102 and the straight right side of the cylinder 101.

[0031] In use, the inclined feed inlet 102 allows materials to enter the cylinder 101 from top to bottom and from the outside to the inside. By providing protrusions 103, the materials effectively tumble and roll under the stopping action of the inner walls of the protrusions 103 when the cylinder 101 rotates. The force on each material is uniform during tumbling and rolling, ensuring a smooth tumbling effect. This uniform force reduces material breakage and lowers the tendency for material to adhere at high temperatures, ensuring continuous operation of the equipment and improving reaction uniformity and efficiency. Compared to the flat inner wall of the cylinder 101, the inner walls of the protrusions 103 increase the rolling stroke of the material. Furthermore, the inward protrusion of the inner walls of the protrusions 103 into the cylinder 101 effectively prevents material from accumulating on the inner walls of the protrusions 103. By setting up the flow stabilizing section 111, the local diameter of the cylinder 101 is increased, thereby increasing the material-accommodating space on the side of the cylinder 101 near the feed inlet 102. A portion of the material entering from the feed inlet 102 can remain within the flow stabilizing section 111, reducing the material's obstruction to the hot air flow, balancing the air pressure near the feed inlet 102, and ensuring the stability of the air velocity and the effectiveness of the hot air flow within the cylinder 101. By setting up the feed conveyor 104, the material carried by the flow stabilizing section 111 can be agitated by the feed conveyor 104 when the cylinder 101 rotates. When agitated by the feed conveyor 104, the material can travel along the feed conveyor 104 to a position on the cylinder 101 away from the flow stabilizing section 111 and the feed conveyor 104, reaching a position close to the inner wall of the protrusion 103. This ensures the material's direction, effectively preventing material accumulation or backflow at the flow stabilizing section 111, and ensuring uniformity and smoothness during continuous feeding.

[0032] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of this patent, all of which should fall within the protection scope of the present invention.

Claims

1. A complete set of equipment for red mud treatment, comprising, from front to back, a batching device, a red mud mixer, a granulator, a solid-phase reactor, a grinding mill, and a magnetic separator, wherein the red mud mixer includes a frame (1), the frame (1) is provided with a rotatable material cylinder (2), the upper part of the material cylinder (2) is provided with an openable cylinder cover (3), the frame (1) is provided with two rotatable stirring shafts (4) that can extend into the material cylinder (2), and the bottom of the inner cavity of the material cylinder (2) is provided with a discharge port, characterized in that: The stirring shaft (4) is provided with several stirring blades (5) arranged vertically and vertically to ensure sufficient stirring of the red mud slurry. At least one of the two stirring shafts (4) is provided with a cooling channel (41) located inside the stirring shaft (4). The stirring shaft (4) is provided with a liquid inlet channel (42) and a liquid outlet channel (43) that can connect the outer surface of the stirring shaft (4) with the cooling channel (41). The frame (1) is provided with a first liquid chamber (11) surrounding the stirring shaft (4) and connecting the liquid inlet channel (42). The frame (1) is provided with a liquid inlet (12) that can connect the first liquid chamber (11) with the external environment. The frame (1) is provided with a second liquid chamber (13) surrounding the stirring shaft (4) and connecting the liquid outlet channel (43). The frame (1) is provided with a liquid outlet (14) that can connect the second liquid chamber (13) with the external environment. The first liquid chamber (11) and the second liquid chamber (13) are spaced apart in the axial direction of the stirring shaft (4).

2. The complete set of equipment for red mud treatment according to claim 1, characterized in that: An anti-wrapping ring (6) is provided in the gap between two adjacent stirring blade layers (5). The anti-wrapping ring (6) is fitted on the stirring shaft (4) and abuts against the stirring blade layer (5) located below the two adjacent stirring blade layers (5). The anti-wrapping ring (6) and the outer surface of the stirring shaft (4) are spaced apart in the radial direction of the stirring shaft (4).

3. The complete set of equipment for red mud treatment according to claim 1, characterized in that: The stirring blade layer (5) includes two stirring blades (51) mounted on the stirring shaft (4), with the two stirring blades (51) facing each other in the radial direction of the stirring shaft (4).

4. The complete set of equipment for red mud treatment according to claim 3, characterized in that: The outer ends of the two stirring paddles (51) in the stirring blade layer (5) are provided with stirring plates (511) extending in the vertical direction. When the number of stirring blade layers (5) with stirring plates (511) is greater than one, the two adjacent stirring plates (511) are opposite each other in the vertical direction and have a gap in the vertical direction. After the stirring plate (511) reaches the position close to the inner wall of the material cylinder (2) driven by the rotation of the stirring shaft (4), the stirring plate (511) can scrape off the red mud slurry on the inner wall of the material cylinder (2).

5. The complete set of equipment for red mud treatment according to claim 3, characterized in that: Two agitators (51) in an agitator layer (5) located below the agitator shaft (4) are provided with a shaped agitator frame (7). The shaped agitator frame (7) includes a downwardly extending longitudinal extension. The lower part of the longitudinal extension is provided with a horizontal extension that extends radially along the agitator shaft (4) and outwards towards the material cylinder (2).

6. The complete set of equipment for red mud treatment according to claim 1, characterized in that: The frame (1) is provided with a hinge shaft, and a scraper (9) is hinged to the frame (1) via the hinge shaft. The scraper (9) is located inside the material cylinder (2) and the bottom of the scraper (9) is close to the bottom of the inner cavity of the material cylinder (2). The frame (1) is provided with a drive unit for driving the hinge shaft to rotate. The side of the scraper (9) away from the hinge shaft can approach and move away from the discharge port at the bottom of the inner cavity of the material cylinder (2) after the scraper (9) swings.

7. The complete set of equipment for red mud treatment according to claim 1, characterized in that: The solid-phase reactor includes a cylindrical body (101) and a feed inlet (102). The feed inlet (102) is inclined downward. The upper and lower sides of the feed inlet (102) are located outside the cylindrical body (101) and inside the cylindrical body (101), respectively. The inner wall of the cylindrical body (101) is provided with a number of protrusions (103). The number of protrusions (103) are distributed circumferentially along the cylindrical body (101). The inner sidewall of the number of protrusions (103) protrudes into the cylindrical body (101). The side of the cylindrical body (101) near the feed inlet (102) is provided with an outwardly bent flow stabilizing section (111). The inner sidewall of the flow stabilizing section (111) is provided with a number of feed belts (104). The feed belts (104) are inclined downward from the side near the feed inlet (102) to the side away from the feed inlet (102).

8. The complete set of equipment for red mud treatment according to claim 7, characterized in that: The flow stabilizing section (111) includes a flared section and a constricted section. The flared section and the constricted section are connected axially in the cylinder (101). The distance between the constricted section and the feed inlet (102) is greater than the distance between the flared section and the feed inlet (102). The diameter of the flared section gradually increases from the side near the feed inlet (102) to the side away from the feed inlet (102). The diameter of the constricted section gradually decreases from the side near the feed inlet (102) to the side away from the feed inlet (102). The minimum diameter of the flared section and the constricted section is adapted to the inner wall diameter of the cylinder (101).

9. The complete set of equipment for red mud treatment according to claim 7, characterized in that: The inner wall of the protrusion (103) is arc-shaped and protrudes into the cylinder (101). The protrusion (103) extends axially along the cylinder (101). Several protrusions (103) are distributed at equal intervals along the circumference of the cylinder (101).

10. The complete set of equipment for red mud treatment according to claim 7, characterized in that: The side of the feed belt (104) away from the flow stabilization section (111) is located between two adjacent protrusions (103) in the circumferential direction of the cylinder (101).

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