CN115057689A

CN115057689A - Production equipment and method of red mud ceramsite sand

Info

Publication number: CN115057689A
Application number: CN202210996846.XA
Authority: CN
Inventors: 乐红志; 白荣; 朱俊阁; 李子超
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-09-16
Anticipated expiration: 2042-08-19
Also published as: CN115057689B

Abstract

The invention discloses a production device and a production method of red mud ceramsite sand, wherein the production device comprises a mixing bin, a material stirring and turning assembly, a material guiding assembly and a forming assembly, wherein the material stirring and turning assembly is arranged in the mixing bin and is used for fully mixing material bodies, then the material bodies enter the material guiding assembly, the material guiding assembly can intermittently convey the material bodies to the forming assembly, the forming assembly at least comprises a first forming mechanism and a second forming mechanism, the first forming mechanism and the second forming mechanism are preheated one by a circulating preheating pipe, in addition, the first forming mechanism and the second forming mechanism are alternately carried out during forming, and a conveying belt is further arranged below the forming assembly and is used for conveying the formed material bodies to a sintering machine for sintering treatment.

Description

Production equipment and method of red mud ceramsite sand

Technical Field

The invention relates to the technical field of red mud ceramsite sand production, in particular to a production device and a production method of red mud ceramsite sand.

Background

The red mud is ultra-fine particles generated in the process of producing alumina by taking bauxite as a raw material, namely, industrial solid waste discharged in the process of extracting alumina in the aluminum production industry is strong-alkaline solid waste discharged in the nonferrous metallurgy industry. At present, the red mud is well treated by being made into red mud ceramsite sand, so that the problems of resource waste caused by the large amount of stockpiling of the red mud and easy environmental pollution and potential safety hazard are well solved;

the conventional red mud ceramsite sand is usually subjected to material mixing and material forming, so that the overall production quality is general, wherein the sufficient and uniform mixing among all materials is required to be ensured during the material mixing, the consistency of the subsequently sintered ceramsite sand can be ensured, the conventional forming device usually mainly comprises two rollers, and when the two rollers rotate, the parts without grooves on the surfaces of the rollers bear large extrusion force and resistance, so that the two rollers are easily overloaded and damaged.

Therefore, it is necessary to provide a production apparatus and a method for red mud ceramsite sand to solve the problems mentioned above in the background art.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: the production equipment of the red mud ceramsite sand comprises a mixing bunker, a material stirring and turning assembly, a material guiding assembly and a forming assembly, wherein the material stirring and turning assembly is arranged in the mixing bunker and used for fully mixing a material body, then the material body enters the material guiding assembly, the material guiding assembly can intermittently convey the material body to the forming assembly, the forming assembly at least comprises a first forming mechanism and a second forming mechanism, the first forming mechanism and the second forming mechanism are preheated one by a circulating preheating pipe, in addition, during forming, the first forming mechanism and the second forming mechanism are alternately carried out, and a conveying belt is further arranged below the forming assembly and used for conveying the formed material body to a sintering machine for sintering treatment.

Further, as preferred, the shaping subassembly still includes the shaping storehouse, top-down has set gradually in the shaping storehouse first forming mechanism and second forming mechanism, first forming mechanism and second forming mechanism's structure is the same, all includes the preheating bin that bilateral symmetry set up, preheating bin horizontal slip embedding in the shaping storehouse, and driven by the telescopic link, two one side that preheating bin is close to each other all is fixed with the profiled surface, the surface of profiled surface has a plurality of recesses.

Preferably, the circulating preheating pipes are in a zigzag shape and sequentially penetrate through the preheating bins, preheating liquid is arranged in the circulating preheating pipes, the preheating liquid in the circulating preheating pipes is driven by a circulating pump to flow in a circulating mode, and the circulating preheating pipes on the upper side and the lower side of the preheating bins are flexible pipes.

Further, preferably, a supplementary pump is further provided at one side of the circulating preheating pipe for pumping the preheating liquid or supplementing the preheating liquid.

Further, preferably, a valve body is arranged on the circulating preheating pipe positioned in the preheating bin.

Further, preferably, the preheating chamber is filled with heat storage particles.

Further, as preferred, dial material and stirring subassembly includes the outer axle, outer vertical set up in the blending bunker, just the outer axle can rotate around its self axis, outer axle is driven by motor one, be fixed with at least one axle bed along its radial outside extension on the outer axle, the axle bed is separated for two sections, and adopts U type pole to link to each other between two sections, one end that the outer axle was kept away from to the axle bed still is fixed with dials the material blade.

Preferably, the outer shaft is further coaxially provided with an inner shaft capable of rotating relatively, the inner shaft is coaxially fixed with a driving bevel gear, the driving bevel gear is meshed with a driven bevel gear, the driven bevel gear is coaxially fixed with a side shaft, the side shaft is rotatably arranged in a shaft seat, and turning blades are fixed at the subsection of the shaft seat.

Further, preferably, the inner shaft is driven by a second motor.

A production method of red mud ceramsite sand comprises the following steps:

the method comprises the following steps: feeding a material body into a mixing bin, wherein the material body comprises red mud, fly ash, a fluxing agent and an adhesive;

step two: carrying out material stirring and turning treatment on the material body by using a material stirring and turning assembly;

step three: intermittently feeding the mixed material body to a forming assembly by using a material guide assembly, wherein the material guide assembly is a packing auger material guide;

step four: preheating the preheating bins one by utilizing a circulating preheating pipe, and then carrying out alternate molding treatment by utilizing a first molding mechanism and a second molding mechanism;

step five: and (4) conveying the molded material body to a sintering machine through a conveyor belt for sintering.

Compared with the prior art, the invention provides production equipment and a method of red mud ceramsite sand, and the production equipment and the method have the following beneficial effects:

in the embodiment of the invention, the first forming mechanism and the second forming mechanism are preheated one by the circulating preheating pipe, and the first forming mechanism and the second forming mechanism are alternately carried out during forming, so that the first forming mechanism and the second forming mechanism can be formed at a better forming temperature, the forming effect is improved, the cracking and other conditions caused by a larger temperature difference in the subsequent sintering process are reduced, in addition, only two forming surfaces are driven to relatively move during forming, no moving resistance exists between the two forming surfaces, the energy saving can be realized to the maximum extent, and the forming effect is good.

In the embodiment of the invention, the material stirring and turning assembly is arranged, at least three working modes can be realized by controlling the starting and stopping of the first motor and the second motor, and the uniformity of material mixing is ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a molding assembly of the present invention;

FIG. 3 is a schematic structural view of the material stirring and turning assembly according to the present invention;

in the figure: 1. a mixing bin; 2. a material stirring and turning assembly; 3. a first motor; 4. a material guiding assembly; 5. a molding assembly; 6. a conveyor belt; 21. a material stirring blade; 22. turning over blades; 23. an outer shaft; 24. a shaft seat; 25. a U-shaped rod; 26. a side shaft; 27. a driven bevel gear; 28. an inner shaft; 51. a molding bin; 52. a first molding mechanism; 53. a second forming mechanism; 54. circulating a preheating pipe; 55. a valve body; 56. a flexible tube; 521. preheating a bin; 522. heat-accumulating particles; 523. molding surface; 524. a telescopic rod.

Detailed Description

Referring to fig. 1 to 3, in an embodiment of the present invention, a production apparatus for red mud ceramsite sand includes a material mixing bin 1, a material stirring and turning assembly 2, a material guiding assembly 4 and a forming assembly 5, wherein, the material stirring and turning component 2 is arranged in the mixing bin 1 and is used for fully mixing the material bodies, then the material bodies enter the material guiding component 4, the material guiding assembly 4 can intermittently feed the material bodies into the forming assembly 5, the forming assembly 5 at least comprises a first forming mechanism 52 and a second forming mechanism 53, the first forming mechanism 52 and the second forming mechanism 53 are preheated one by a circulating preheating pipe 54, and during molding, the first molding mechanism 52 and the second molding mechanism 53 are alternately performed, and a conveyor belt 6 is further arranged below the molding assembly 5 and used for conveying the molded material body into a sintering machine for sintering treatment.

In this embodiment, guide subassembly 4 is auger guide, specifically speaking, as figure 1, auger guide includes the guide cylinder, it is provided with the auger to rotate in the guide cylinder, utilize the auger to receive the material and can realize that passive form is received and active ejection of compact, further say, though the rotation of auger can make the material body discharge, but this kind of discharge can not play the suction effect to the material body in the blending bunker 1, consequently, can realize active ejection of compact and passive form and receive the material under the condition that does not influence the material body in the blending bunker 1 to, can also control discharge speed in a flexible way, parameters such as ejection of compact frequency.

In this embodiment, the first forming mechanism 52 and the second forming mechanism 53 are preheated by the circulating preheating pipe 54 one by one, and the first forming mechanism 52 and the second forming mechanism 53 are alternately performed during forming, so that the first forming mechanism and the second forming mechanism can maintain a better forming temperature for forming, thereby improving the forming effect and reducing cracking and the like caused by a larger temperature difference in the subsequent sintering process.

In addition, a conveyor belt 6 is arranged below the forming assembly 5 and used for conveying the formed material body to a sintering machine for sintering treatment;

the conveyor belt 6 comprises symmetrically arranged power rollers, and a belt body is connected between the two power rollers in a transmission manner;

furthermore, a hole body is arranged on the belt body and used for separating the unformed material body;

furthermore, a material collecting groove is arranged in a space between the belt body above and the belt body below.

In this embodiment, as shown in fig. 2, the molding assembly 5 further includes a molding bin 51, the molding bin 51 is sequentially provided with the first molding mechanism 52 and the second molding mechanism 53 from top to bottom, the first molding mechanism 52 and the second molding mechanism 53 have the same structure, and both the first molding mechanism 52 and the second molding mechanism 53 include preheating bins 521 symmetrically arranged from left to right, the preheating bins 521 are horizontally embedded in the molding bin 51 in a sliding manner and driven by an expansion link 524, molding surfaces 523 are fixed on both sides of the two preheating bins 521 close to each other, and a surface of each molding surface 523 has a plurality of grooves.

It should be explained that the traditional pelletizer usually uses a pair of rollers to extrude each other for pelletizing, and usually there are grooves on the surface of the roller of two corresponding rollers, and pelletizing is realized by forming space through two corresponding grooves. However, at present, a driving mechanism such as a motor is generally adopted to simultaneously drive the two rollers to rotate in opposite directions, so that energy consumption is greatly improved, energy conservation is not facilitated, and when the two rollers rotate, the parts, without grooves, of the surfaces of the two rollers bear large extrusion force and resistance, so that overload is easily caused and damage is easily caused.

In the embodiment, only two molding surfaces are required to be driven to move relatively, and no moving resistance exists between the two molding surfaces, so that energy conservation can be realized to the greatest extent, and the molding effect is good.

In a preferred embodiment, the circulating preheating pipe 54 is a zigzag shape and sequentially passes through each preheating chamber 521, the preheating liquid is disposed in the circulating preheating pipe 54, the preheating liquid in the circulating preheating pipe 54 is driven by a circulating pump to flow circularly, and the circulating preheating pipes 54 located at the upper and lower sides of the preheating chambers 521 are flexible pipes 56.

The preheating liquid is preferably heat-conducting liquid, which can be recycled, and the preheating liquid in the circulating preheating pipe 54 is driven by a circulating pump to circularly flow, so that the preheating bin can be fully preheated by the preheating liquid;

in this case, the preheating bin is disposed on a side close to the molding surface, and the molding surface is made of a heat conducting material.

In a preferred embodiment, a supplementary pump is further disposed at one side of the circulating preheating pipe 54 for pumping the preheating liquid or supplementing the preheating liquid.

In a preferred embodiment, a valve body 55 is disposed on the circulating preheating pipe 54 located in the preheating chamber 521, and the valve body 55 is used for controlling the communication and closing between the circulating preheating pipe 54 and the preheating chamber 521.

In a preferred embodiment, the preheating chamber 521 is filled with heat storage particles 522.

Therefore, in operation, the circulating pump is used to drive the preheating liquid to circularly flow in the circular preheating pipe 54 in a shape of Chinese character hui, then the valve body in the first forming mechanism 52 is opened, and the valve body in the second forming mechanism 53 is kept closed, so that the preheating liquid is fully contacted with the heat storage particles 522 in the first forming mechanism 52 for heat exchange, after the heat exchange is completed sufficiently, the first forming mechanism is used to perform forming treatment on the material body,

meanwhile, the preheating liquid is pumped out by using a supplementary pump, the valve body in the first molding mechanism 52 is closed, the valve body in the second molding mechanism 53 is opened, then the supplementary pump is used for supplementing the preheating liquid with the temperature reaching the standard, so that the preheating liquid is fully contacted with the heat storage particles 522 in the second molding mechanism 53 for heat exchange, and after the heat exchange is fully finished, the second molding mechanism is used for molding the material body; and by analogy, the first forming mechanism and the second forming mechanism can form the material body at a better preheating temperature.

In this embodiment, as shown in fig. 3, the material stirring and turning assembly 2 includes an outer shaft 23, the outer shaft 23 is vertically arranged in the blending bunker 1, and the outer shaft 23 can rotate around its own axis, the outer shaft 23 is driven by a motor 3, at least one shaft seat 24 extending radially outwards is fixed on the outer shaft 23, the shaft seat 24 is divided into two sections, and the two sections are connected by a U-shaped rod 25, and one end of the shaft seat 24 far away from the outer shaft 23 is further fixed with a material stirring blade 21.

Therefore, the outer shaft 23 is driven to rotate by the first motor 3, and the material shifting blades 21 can be driven to horizontally rotate, so that material shifting processing is realized.

In addition, an inner shaft 28 capable of rotating relatively is coaxially arranged in the outer shaft 23, a driving bevel gear is coaxially fixed on the inner shaft 28, the driving bevel gear is meshed with a driven bevel gear 27, a side shaft 26 is coaxially fixed on the driven bevel gear 27, the side shaft 26 is rotatably arranged in the shaft seat 24, and the turning blade 22 is fixed at the section of the shaft seat 24.

The inner shaft 28 is driven by a second motor.

It should be explained that, in this embodiment, a controller may be further configured, where the controller is capable of controlling at least the first motor and the second motor, and at least three operation modes, which are the first operation mode, the second operation mode, and the third operation mode, can be implemented by controlling start and stop of the first motor and the second motor;

wherein, the first working mode is as follows: the outer shaft 23 remains rotating and the inner shaft 28 remains stationary; at the moment, the material stirring blades 21 horizontally stir materials along with the material stirring, the side shaft 26 moves along with the circumferential direction of the outer shaft 23, and in the process, the driven bevel gear 27 performs meshing rotation along the circumferential direction of the driving bevel gear, so that the driven bevel gear 27 can drive the side shaft 26 to synchronously rotate around the axis of the side shaft in the meshing rotation process, and the material stirring blades 22 are driven to stir materials;

the second working mode is as follows: the outer shaft 23 keeps still, the inner shaft 28 keeps rotating, at the moment, under the cooperation of the driving bevel gear and the driven bevel gear 27, the side shaft 26 rotates along with the driving bevel gear, and therefore the material turning blades are driven to turn;

the third working mode is as follows: the outer shaft 23 keeps rotating, the inner shaft 28 keeps rotating with the outer shaft 23 at the same speed in the same direction, so that the outer shaft 23 and the driven bevel gear 27 are kept in a relative static state, the driven bevel gear 27 and the driving bevel gear are also kept in a relative static state, therefore, the side shaft 26 cannot synchronously rotate around the axis thereof, and only the material stirring blades 21 are horizontally stirred along with the material stirring blades.

A production method of red mud ceramsite sand comprises the following steps:

the method comprises the following steps: a material body is put into the mixing bin 1, and the material body comprises red mud, fly ash, fluxing agent and adhesive;

step two: the material stirring and turning assembly 2 is used for stirring and turning the material body;

step three: intermittently feeding the mixed material body to a forming assembly 5 by using a material guide assembly 4, wherein the material guide assembly 4 is a packing auger material guide;

step four: preheating the preheating bin 521 one by using a circulating preheating pipe 54, and then performing alternate molding treatment by using a first molding mechanism 52 and a second molding mechanism 53;

step five: the formed body is sent to a sintering machine for sintering through a conveyor belt 6.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims

1. The production equipment of the red mud ceramsite sand is characterized by comprising a mixing bin (1), a material stirring and turning assembly (2), a material guiding assembly (4) and a forming assembly (5), wherein the material stirring and turning assembly (2) is arranged in the mixing bin (1) and is used for fully mixing a material body, then the material body enters the material guiding assembly (4), the material guiding assembly (4) can intermittently convey the material body to the forming assembly (5), the forming assembly (5) at least comprises a first forming mechanism (52) and a second forming mechanism (53), the first forming mechanism (52) and the second forming mechanism (53) are preheated one by a circulating preheating pipe (54), in addition, the first forming mechanism (52) and the second forming mechanism (53) are alternately carried out during forming, a conveying belt (6) is further arranged below the forming assembly (5), and the formed material body is sent to a sintering machine for sintering treatment.

2. The production equipment of red mud ceramsite sand according to claim 1, which is characterized in that: the molding assembly (5) further comprises a molding bin (51), wherein the molding bin (51) is sequentially provided with a first molding mechanism (52) and a second molding mechanism (53) from top to bottom, the first molding mechanism (52) and the second molding mechanism (53) are identical in structure and respectively comprise preheating bins (521) which are arranged in a bilateral symmetry mode, the preheating bins (521) are horizontally embedded into the molding bin (51) in a sliding mode and driven by telescopic rods (524), two molding surfaces (523) are respectively fixed on one sides, close to each other, of the preheating bins (521), and a plurality of grooves are formed in the surface of each molding surface (523).

3. The production equipment of red mud ceramsite sand according to claim 2, which is characterized in that: the circulating preheating pipes (54) are in a shape of Chinese character 'hui' and sequentially penetrate through the preheating bins (521), preheating liquid is arranged in the circulating preheating pipes (54), the preheating liquid in the circulating preheating pipes (54) is driven by a circulating pump to flow in a circulating mode, and the circulating preheating pipes (54) located on the upper side and the lower side of the preheating bins (521) are flexible pipes (56).

4. The production equipment of red mud ceramsite sand according to claim 3, which is characterized in that: and a supplementary pump is arranged on one side of the circulating preheating pipe (54) and is used for pumping the preheating liquid or supplementing the preheating liquid.

5. The production equipment of red mud ceramsite sand according to claim 3, which is characterized in that: a valve body (55) is arranged on the circulating preheating pipe (54) in the preheating bin (521).

6. The production equipment of red mud ceramsite sand according to claim 3, which is characterized in that: the preheating bin (521) is filled with heat storage particles (522).

7. The production equipment of red mud ceramsite sand according to claim 1, which is characterized in that: dial material and stirring subassembly (2) and include outer axle (23), outer axle (23) vertical set up in blending bunker (1), just outer axle (23) can rotate around its self axis, outer axle (23) are driven by motor (3), be fixed with at least one axle bed (24) of following its radial outside extension on outer axle (23), axle bed (24) are separated for two sections, and adopt U type pole (25) to link to each other between two sections, one end that outer axle (23) was kept away from in axle bed (24) still is fixed with dials material blade (21).

8. The production equipment of red mud ceramsite sand according to claim 7, which is characterized in that: an inner shaft (28) capable of rotating relatively is further coaxially arranged in the outer shaft (23), a driving bevel gear is coaxially fixed on the inner shaft (28), the driving bevel gear is meshed with a driven bevel gear, a side shaft (26) is coaxially fixed on the driven bevel gear, the side shaft (26) is rotatably arranged in the shaft seat (24), and turning blades (22) are fixed at the segmented position of the shaft seat (24).

9. The production equipment of red mud ceramsite sand according to claim 8, which is characterized in that: the inner shaft (28) is driven by a second motor.

10. A method for producing red mud ceramsite sand, which uses the production equipment for red mud ceramsite sand as defined in claim 2, and is characterized by comprising the following steps:

the method comprises the following steps: a material body is put into the mixing bin (1), and the material body comprises red mud, fly ash, fluxing agent and adhesive;

step two: the material stirring and turning component (2) is used for stirring and turning the material body;

step three: the mixed material body is intermittently conveyed to a forming assembly (5) by utilizing a material guide assembly (4), wherein the material guide assembly (4) is a packing auger material guide device;

step four: preheating the preheating bin (521) one by utilizing a circulating preheating pipe (54), and then alternately forming by utilizing a first forming mechanism (52) and a second forming mechanism (53);

step five: the formed material body is sent to a sintering machine for sintering through a conveyor belt (6).