Carbide slag adding device for aluminum oxide dissolution

Abstract

The invention relates to a mixing device, and provides a carbide slag adding device for aluminum oxide dissolution, which comprises a tank body, a feeding pipe arranged on the side wall of the tank body, a plurality of liquid suction pipes arranged on the outer wall of the tank body, a guide pipe simultaneously connected with the plurality of liquid suction pipes, a pump body connected with the guide pipe, and a grouting pipe connected with the pump body, the nozzle is arranged at the end of the grouting pipe and located in the tank body, the first driving device is used for driving the nozzle to move in the vertical direction, and the pH detection device is arranged on the side wall of the tank body; the multiple liquid suction pipes are distributed in the vertical direction, the side wall of the guide pipe is connected with a feeding pipe, and the feeding pipe is connected with a liquid storage box. According to the carbide slag adding device for dissolving out the aluminum oxide, the bauxite slurry can be efficiently mixed, the mixing efficiency of the slurry is improved, and the pH value of the slurry is more accurately regulated and controlled.

Description

Technical Field

[0001] The invention relates to the technical field of mixing devices, and in particular to a carbide slag adding device for dissolving alumina. Background Art

[0002] Bauxite is the best raw material for producing aluminum and is also the most important application area. Its consumption accounts for more than 90% of the world's total bauxite production. Among the processes for preparing aluminum using bauxite, the Bayer process is a more common one. Its principle is to convert the alumina hydrate in bauxite into sodium aluminate with concentrated sodium hydroxide solution, and re-precipitate the aluminum hydroxide by dilution and adding aluminum hydroxide seeds. The remaining sodium aluminate solution, also called mother liquor, is reused to process the next batch of bauxite, realizing continuous production.

[0003] First of all, the bauxite should be slurried, that is, bauxite, lime, sodium chlorate solution, etc. should be ground and dispersed into raw pulp according to a certain ratio. Lime is one of the important sources of alkali in raw pulp, and carbide slag can be used to replace lime as the source of alkali. In the process of raw pulp preparation, and subsequent high-pressure dissolution, dilution, separation and washing, the pH of raw pulp has a significant impact on the entire process, which mainly affects the amount of subsequent raw materials added, and the purity of alumina. And because the pH of each batch of bauxite has a certain difference, each time the slurry is adjusted, it is not possible to simply increase the amount of corresponding alkali according to the amount of bauxite, but to try to detect the pH of the slurry during the slurry adjustment process, and adjust the amount of carbide slag added according to the pH. In this way, if the slurry preparation amount of a single batch is small, the overall slurry adjustment efficiency is not high. If the slurry preparation amount of a single batch is large, then the slurry is easily unevenly distributed during slurry adjustment. Therefore, a more efficient slurry adjustment device can be designed. Summary of the invention

[0004] The object of the present invention is to provide a carbide slag adding device for alumina dissolution, which can efficiently adjust the bauxite slurry, improve the mixing efficiency of the slurry and more accurately control the pH value of the slurry.

[0005] The embodiment of the present invention is achieved through the following technical scheme: the calcium carbide slag adding device for alumina dissolution of the present invention includes a tank body, a feeding pipe arranged on the side wall of the tank body, multiple suction pipes arranged on the outer wall of the tank body, a conduit connected to the multiple suction pipes, a pump body connected to the conduit, a grouting pipe connected to the pump body, a nozzle arranged at the end of the grouting pipe and located inside the tank body, a first driving device for driving the nozzle to move in a vertical direction, and a pH detection device arranged on the side wall of the tank body; the multiple suction pipes are distributed in the vertical direction, the side wall of the conduit is connected to the feeding pipe, and the feeding pipe is connected to a liquid storage tank.

[0006] Furthermore, each of the pipettes is provided with a valve, and the valve is an automatic valve.

[0007] Furthermore, a pair of sliding rods are vertically provided in the tank body, a sliding block is slidably provided on the sliding rods, the nozzle is fixedly connected to the sliding block; and the sliding block is connected to the first driving device.

[0008] Furthermore, the first driving device includes a winding motor disposed above the tank body, a winding roller connected to the winding motor, and a pull rope wound around the winding roller; the pull rope is fixedly connected to the slider.

[0009] Furthermore, the inner wall of the tank body is provided with a plurality of vertically arranged spoilers, and the plurality of spoilers are distributed in a circle.

[0010] Furthermore, one of the spoilers is a first spoiler, and the other spoilers are second spoilers; the pH detection device is arranged close to the first spoiler; the pH detection device includes a sleeve horizontally arranged on the outer wall of the tank body, a sliding tube slidably arranged in the sleeve, a pH probe arranged in the sliding tube, a wire connected to the pH probe, and a second driving device for driving the sliding tube to move axially along the sleeve; an adjusting motor is connected to the upper end of the first spoiler, and the adjusting motor is used to drive the first spoiler to rotate along the axis of its length direction; one end of the sliding tube close to the tank body is an open end, and the other end is a closed end; the open end of the sliding tube is arranged inside the tank body and abuts against the first spoiler.

[0011] Furthermore, the end of the sleeve away from the tank body is a closed end; the second driving device includes a spring arranged in the sleeve, an air pipe connected to the end of the sleeve away from the tank body, and an air compressor connected to the air pipe; one end of the spring is fixedly connected to the inner wall of the end of the sleeve away from the tank body, and the other end is fixedly connected to the end of the sliding tube.

[0012] Furthermore, the pH detection device is provided in plurality, and the plurality of pH detection devices are evenly distributed along the vertical direction.

[0013] Furthermore, it also includes a stirring device, which includes a stirring shaft vertically arranged in the tank body, a plurality of blades arranged on the stirring shaft, and a stirring motor connected to the upper end of the stirring shaft.

[0014] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: the carbide slag adding device for alumina dissolution of the present invention, when in use, injects the slurry formed by mixing bauxite and sodium silicate solution into the tank body through the feeding pipe, detects the pH value of the slurry through the pH detection device, the pump body sucks the slurry in the tank body through the conduit and the suction pipe, and then injects it into the tank body through the grouting pipe, according to the pH value detected by the pH detection device, a corresponding amount of carbide slag slurry is injected into the liquid storage tank, and then enters the conduit through the feeding pipe, and finally injected into the tank body through the pump body and the grouting pipe, and the addition amount of the carbide slag slurry is slowly adjusted by measuring the change of pH value in real time, and during the adding process, multiple suction pipes can absorb slurry at different depths of the tank body, and re-inject the slurry into different depths of the tank body through the nozzle and the first driving device, so that the slurry at different depths inside the tank body can also achieve efficient convection mixing, so that the pH value of the slurry at various places inside the tank body gradually tends to be consistent, thereby improving the quality stability and uniformity of the final slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A structural schematic diagram of a carbide slag adding device for alumina dissolution provided by an embodiment of the present invention from one perspective;

[0017] Figure 2 A schematic structural diagram of a carbide slag adding device for alumina dissolution from two perspectives provided in an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of the upper end portion of the tank body provided by an embodiment of the present invention;

[0019] Figure 4 A schematic structural diagram of a perspective view of the interior of a tank provided by an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the structure of the interior of a tank from two perspectives provided by an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the structure of a pump body provided by an embodiment of the present invention;

[0022] Figure 7 A schematic diagram of the structure of a pH detection device in one state provided by an embodiment of the present invention;

[0023] Figure 8 A schematic diagram of the structure of a pH detection device in two states provided by an embodiment of the present invention;

[0024] Fig. 9 for Figure 4 Enlarged view of part A.

[0025] Icons: 10-tank body, 11-feeding pipe, 12-suction tube, 13-valve, 14-conduit, 15-pump body, 16-grouting pipe, 17-feeding pipe, 18-liquid storage tank, 19-slider, 110-nozzle, 111-pull rope, 112-winding motor, 113-winding shaft, 114-slide rod, 20-pH detection device, 21-casing, 22-slide tube, 23-pH probe, 24-spring, 25-air pipe, 26-wire, 31-first spoiler, 32-second spoiler, 33-adjusting motor, 41-stirring motor, 42-stirring shaft, 43-blade. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example

[0032] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Fig. 9 As shown, the device for adding calcium carbide slag for alumina dissolution of this embodiment includes a tank body 10, a feeding pipe 11 arranged on the side wall of the tank body 10, a plurality of suction pipes 12 arranged on the outer wall of the tank body 10, a conduit 14 connected to the plurality of suction pipes 12, a pump body 15 connected to the conduit 14, a grouting pipe 16 connected to the pump body 15, a nozzle 110 arranged at the end of the grouting pipe 16 and located inside the tank body 10, a first driving device for driving the nozzle 110 to move in a vertical direction, and a pH detection device 20 arranged on the side wall of the tank body 10; the plurality of suction pipes 12 are distributed in the vertical direction, the side wall of the conduit 14 is connected to a feeding pipe 17, and the feeding pipe 17 is connected to a liquid storage tank 18. Specifically, when in use, the slurry formed by mixing bauxite and sodium silicate solution is injected into the tank body 10 through the feed pipe 11, the pH value of the slurry is detected by the pH detection device 20, the pump body 15 sucks the slurry in the tank body 10 through the conduit 14 and the suction pipe 12, and then injects it into the tank body 10 through the grouting pipe 16, according to the pH value detected by the pH detection device 20, a corresponding amount of calcium carbide slag slurry is injected into the liquid storage tank 18, and then enters the conduit 14 through the feeding pipe 17, and finally enters the conduit 14 through the pump body 15 and the grouting pipe 16. 6 is injected into the tank body 10, and the amount of carbide slag slurry added is slowly adjusted by measuring the change of pH value in real time. In the process of adding, the plurality of suction pipes 12 can absorb the slurry at different depths of the tank body 10, and re-inject the slurry into different depths of the tank body 10 through the nozzle 110 and the first driving device, so that the slurry at different depths inside the tank body 10 can also achieve efficient convection mixing, so that the pH value of the slurry at various places inside the tank body 10 gradually tends to be consistent, thereby improving the quality stability and uniformity of the final slurry.

[0033] In this embodiment, each pipette 12 is provided with a valve 13, and the valve 13 is an automatic valve 13. Specifically, when the slurry in the tank 10 is extracted through the pipette 12, only one of the pipettes 12 is used to suck the liquid each time, so an automatic valve 13 is needed to control the pipettes 12 to open and close in sequence. The valve 13 can be a common automatic opening and closing valve 13 such as a solenoid valve and a pneumatic valve.

[0034] In the present embodiment, a pair of slide bars 114 are vertically provided in the tank body 10, and a slider 19 is slidably provided on the slide bars 114, and the nozzle 110 is fixedly connected to the slider 19; the slider 19 is connected to the first driving device. The first driving device includes a winding motor 112 provided above the tank body 10, a winding roller connected to the winding motor 112, and a pull rope 111 wound on the winding roller; the pull rope 111 is fixedly connected to the slider 19. Specifically, the slide bar 114 is provided to ensure that the slider 19 and the nozzle 110 can stably move up and down, and the slurry is evenly dispersed in the slurry at various depths of the tank body 10. The winding roller is driven to rotate by the winding motor 112, and the pull rope 111 can be tightened, thereby moving the slider 19 upward. When the winding motor 112 is reversed, the slider 19 moves downward under the action of its own gravity. The grouting pipe 16 needs to use a hose.

[0035] The inner wall of the tank 10 in this embodiment is provided with a plurality of vertically arranged spoilers, and the plurality of spoilers are distributed in a circumference. Specifically, the spoilers can better stir the slurry, so that it is more efficiently and fully mixed.

[0036] In this embodiment, one of the spoilers is a first spoiler 31, and the other spoilers are second spoilers 32; the pH detection device 20 is arranged near the first spoiler 31; the pH detection device 20 includes a sleeve 21 horizontally arranged on the outer wall of the tank body 10, a sliding tube 22 slidably arranged in the sleeve 21, a pH probe 23 arranged in the sliding tube 22, a wire 26 connected to the pH probe 23, and a second driving device for driving the sliding tube 22 to move axially along the sleeve 21; an adjusting motor 33 is connected to the upper end of the first spoiler 31, and the adjusting motor 33 is used to drive the first spoiler 31 to rotate along the axis of its length direction; one end of the sliding tube 22 close to the tank body 10 is an open end, and the other end is a closed end; the open end of the sliding tube 22 is arranged inside the tank body 10 and abuts against the first spoiler 31. Specifically, when the pH detection device 20 is used to measure the pH of the slurry, the first spoiler 31 is first rotated by the regulating motor 33 so that the plane where the first spoiler 31 is located is perpendicular to the axis of the slide tube 22. Then, when the second driving device is used, the slide tube 22 slides out of the sleeve 21 and enters the tank body 10. Then, the open end of the slide tube 22 abuts against the first spoiler 31 (as shown in the attached figure). Figure 7As shown in the figure, at this time, the first spoiler 31 is equivalent to closing the open end of the slide tube 22, so that the slurry in the slide tube 22 is in a static state (the slurry in the rest of the tank body 10 is always in a flowing state), and the pH probe 23 can accurately measure the pH value of the slurry (electrode pH measurement can be used). After a single measurement is completed, the slide tube 22 is retracted into the sleeve 21, and the motor 33 is adjusted to rotate the first spoiler 31 to return it to its previous position (as shown in the figure). Figure 8 shown).

[0037] In this embodiment, the end of the sleeve 21 away from the tank body 10 is a closed end; the second driving device includes a spring 24 arranged in the sleeve 21, an air pipe 25 connected to the end of the sleeve 21 away from the tank body 10, and an air compressor connected to the air pipe 25; one end of the spring 24 is fixedly connected to the inner wall of the end of the sleeve 21 away from the tank body 10, and the other end is fixedly connected to the end of the slide tube 22. Specifically, the air compressor injects air into the sleeve 21 through the air pipe 25, thereby pushing the slide tube 22 out of the sleeve 21. After the air compressor releases pressure, the slide tube 22 returns to its previous position under the action of the spring 24.

[0038] In this embodiment, a plurality of pH detection devices 20 are provided, and the plurality of pH detection devices 20 are evenly distributed in the vertical direction. Specifically, through periodic measurement by the plurality of pH detection devices 20, the pH value of the slurry at various locations in the tank body 10 can be known in real time, so as to know whether the slurry is evenly mixed and whether the pH value has reached a preset value.

[0039] In this embodiment, a stirring device is also included, which includes a stirring shaft 42 vertically arranged in the tank body 10 , a plurality of blades 43 arranged on the stirring shaft 42 , and a stirring motor 41 connected to the upper end of the stirring shaft 42 .

[0040] In summary, the device for adding carbide slag for alumina dissolution of the present embodiment, when in use, injects the slurry formed by mixing bauxite and sodium silicate solution into the tank body 10 through the feed pipe 11, detects the pH value of the slurry through the pH detection device 20, and the pump body 15 sucks the slurry in the tank body 10 through the conduit 14 and the suction pipe 12, and then injects it into the tank body 10 through the grouting pipe 16, and injects a corresponding amount of carbide slag slurry into the liquid storage tank 18 according to the pH value detected by the pH detection device 20, and then enters the conduit 14 through the feeding pipe 17, and finally passes through The pump body 15 and the grouting pipe 16 are injected into the tank body 10, and the amount of carbide slag slurry added is slowly adjusted by measuring the change of pH value in real time. During the adding process, multiple suction tubes 12 can absorb the slurry at different depths of the tank body 10, and re-inject the slurry into different depths of the tank body 10 through the nozzle 110 and the first driving device, so that the slurry at different depths inside the tank body 10 can also achieve efficient convection mixing, so that the pH value of the slurry at various locations inside the tank body 10 gradually tends to be consistent, thereby improving the quality stability and uniformity of the final slurry.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for adding carbide slag for dissolution of alumina, Features: The invention comprises a tank body (10), a feed pipe (11) arranged on the side wall of the tank body (10), a plurality of liquid suction pipes (12) arranged on the outer wall of the tank body (10), a conduit (14) connected to the plurality of liquid suction pipes (12), a pump body (15) connected to the conduit (14), a grouting pipe (16) connected to the pump body (15), a nozzle (110) arranged at the end of the grouting pipe (16) and located inside the tank body (10), a first driving device for driving the nozzle (110) to move in a vertical direction, and a pH detection device (20) arranged on the side wall of the tank body (10); The plurality of liquid suction pipes (12) are distributed in a vertical direction, the side wall of the conduit (14) is connected to a feeding pipe (17), and the feeding pipe (17) is connected to a liquid storage tank (18).

2. The device for adding carbide slag for dissolving alumina according to claim 1, Features: Each of the liquid suction tubes (12) is provided with a valve (13), and the valve (13) is an automatic valve (13).

3. The device for adding carbide slag for dissolving alumina according to claim 1, Features: A pair of sliding rods (114) are vertically arranged in the tank body (10), a slider (19) is slidably arranged on the sliding rods (114), the nozzle (110) is fixedly connected to the slider (19), and the slider (19) is connected to the first driving device.

4. The device for adding carbide slag for dissolving alumina according to claim 3, Features: The first driving device comprises a winding motor (112) arranged above the tank body (10), a winding roller connected to the winding motor (112), and a pull rope (111) wound around the winding roller; the pull rope (111) is fixedly connected to the slider (19).

5. The device for adding carbide slag for dissolving alumina according to claim 1, Features: The inner wall of the tank body (10) is provided with a plurality of vertically arranged spoilers, and the plurality of spoilers are distributed in a circumference.

6. The device for adding carbide slag for dissolving alumina according to claim 5, Features: Assume that one of the spoilers is a first spoiler (31), and the other spoilers are second spoilers (32); The pH detection device (20) is arranged near the first spoiler (31); the pH detection device (20) comprises a sleeve (21) horizontally arranged on the outer wall of the tank body (10), a slide tube (22) slidably arranged in the sleeve (21), a pH probe (23) arranged in the slide tube (22), a wire (26) connected to the pH probe (23), and a second driving device for driving the slide tube (22) to move along the axial direction of the sleeve (21); an adjusting motor (33) is connected to the upper end of the first spoiler (31), and the adjusting motor (33) is used to drive the first spoiler (31) to rotate along the axis of its length direction; One end of the sliding tube (22) close to the tank body (10) is an open end, and the other end is a closed end; the open end of the sliding tube (22) is arranged inside the tank body (10) and abuts against the first spoiler (31).

7. The device for adding carbide slag for dissolving alumina according to claim 6, Features: The end of the sleeve (21) away from the tank body (10) is a closed end; the second driving device comprises a spring (24) arranged in the sleeve (21), an air pipe (25) connected to the end of the sleeve (21) away from the tank body (10), and an air compressor connected to the air pipe (25); One end of the spring (24) is fixedly connected to the inner wall of one end of the sleeve (21) away from the tank body (10), and the other end is fixedly connected to the end of the sliding tube (22).

8. The device for adding carbide slag for dissolving alumina according to claim 7, Features: A plurality of the pH detection devices (20) are provided, and the plurality of the pH detection devices (20) are evenly distributed along the vertical direction.

9. The device for adding carbide slag for dissolving alumina according to claim 1, Features: The tank (10) further comprises a stirring device, wherein the stirring device comprises a stirring shaft (42) vertically arranged in the tank body (10), a plurality of blades (43) arranged on the stirring shaft (42), and a stirring motor (41) connected to the upper end of the stirring shaft (42).

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