CN115679126A - Vanadium shale step continuous leaching system - Google Patents
Vanadium shale step continuous leaching system Download PDFInfo
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- CN115679126A CN115679126A CN202211230520.2A CN202211230520A CN115679126A CN 115679126 A CN115679126 A CN 115679126A CN 202211230520 A CN202211230520 A CN 202211230520A CN 115679126 A CN115679126 A CN 115679126A
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- 238000002386 leaching Methods 0.000 title claims abstract description 152
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 28
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 61
- 238000003756 stirring Methods 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000002562 thickening agent Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 15
- 239000011707 mineral Substances 0.000 abstract description 15
- 238000002156 mixing Methods 0.000 abstract description 14
- 230000008021 deposition Effects 0.000 abstract description 12
- 238000010924 continuous production Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 10
- 238000009826 distribution Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to a vanadium shale step continuous leaching system. The technical scheme is as follows: the continuous leaching system is formed by sequentially arranging n leaching devices (1) in a step shape. The 1 st leaching device (1) is communicated with an external bin, the adjacent leaching devices (1) are communicated through a conveying pipe (2), and the last leaching device (1) is communicated with a thickener in the next working procedure. The steam delivery branch pipe (4) of each leaching device (1) is respectively communicated with a steam delivery pipe (5), and the center of the bottom of the tank body (8) of each leaching device (1) is provided with a spherical boss (16); a driving motor (10) arranged at the center of the cover plate (9) is connected with a stirring shaft (14) through a coupler, and an inclined blade type stirrer (7) and a six-straight-blade turbine stirrer (6) are correspondingly arranged at the middle part and the lower part of the stirring shaft (14). An acid adding pipe (13) positioned in the tank body (8) is communicated with the acid adding tank (12). The invention has the characteristics of uniform mixing, less mineral deposition, high leaching strength, low energy consumption and continuous production.
Description
Technical Field
The invention belongs to the technical field of vanadium shale leaching systems. In particular to a vanadium shale step continuous leaching system.
Background
The mechanical stirring equipment has the characteristics of high applicability, wide application range and the like in the wet vanadium extraction production of the vanadium shale. The agitation leaching tank is the main equipment used in the vanadium shale wet vanadium extraction leaching section, and is usually carried out under the working condition of continuous pressurization and acid addition in practical production application. However, the problem of mineral deposition and the like easily exists below the center of the stirring equipment, and when the stirring strength is insufficient, a pressure tank is easily generated in the leaching process, so that a motor is damaged to cause flow cutoff, and the leaching effect is adversely affected. Therefore, efforts to improve and optimize mechanical stirring equipment have been of interest to those skilled in the art.
The patent technology of 'a large-scale stirring tank' (CN 202021885018.1) changes the tank bottom into a downward arc-shaped bottom so as to solve the problems of stirring dead zones and the like, and although the stirring tank can improve the problem of uneven mixing caused by stirring dead angles, the effect of reducing the deposition in the central area of the tank bottom is not obvious. The patent technology of 'leaching tank' (CN201520266902. X) is characterized in that a slope filler is formed on the inner side wall of the bottom of the leaching tank to reduce the sedimentation phenomenon at the bottom of the leaching tank, the leaching tank has certain improvement effect on sedimentation, but only has certain improvement on a stirring dead zone at the tank wall of the bottom, the problem of the settling tank cannot be solved well, and the mixing effect of the combined blades of the same type is not uniform. The patent technology of 'a high-efficiency stirring tank' (CN 202021886184.3) is characterized in that a plurality of stirring mechanisms are arranged in the tank, the device improves the stirring effect, but is complex to maintain, and the increase of the stirring mechanisms greatly improves the power of a motor. The patent technology of a reaction tank for producing acid leaching vanadium-containing leachate, a stirring device thereof and an acid leaching process (CN 201610997248.9) adopts a stirring assembly which has a good mixing effect, but the space between paddles and the off-bottom height of the lower paddle are not described, and the problem of particle deposition is not effectively solved.
In conclusion, the existing agitation leaching device has the technical defects of uneven mixing, complex equipment maintenance, overlarge power, particle deposition at the bottom of the tank and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a vanadium shale step continuous leaching system which is uniform in mixing, less in mineral deposition, high in leaching strength, low in energy consumption and capable of realizing continuous production.
In order to achieve the purpose, the invention adopts the technical scheme that:
the vanadium shale step continuous leaching system comprises n leaching devices, a steam conveying pipe, n steam conveying branch pipes and n +1 conveying pipes.
For simplicity, the following letters will be described in a unified manner:
n represents the number of the leaching devices, the steam conveying branch pipes and the conveying pipes, and is a natural number of 2-10;
h represents the height of a tank body in the leaching device and has a unit of mm;
d represents the diameter of the tank in mm in the leaching apparatus.
The vanadium shale step continuous leaching system uses the height difference delta h between adjacent leaching devices 1 And the =3/4 to 1/2h are arranged in a step-by-step manner in sequence.
The upper port of the 1 st material conveying pipe is communicated with an external bin, and the lower port of the 1 st material conveying pipe is communicated with the feed inlet of the 1 st leaching device; the upper port of the 2 nd conveying pipe is communicated with the discharge hole of the 1 st leaching device, and the lower port of the 2 nd conveying pipe is communicated with the feed hole of the 2 nd leaching device; by parity of reasoning, the upper port of the nth conveying pipe is communicated with the discharge hole of the (n-1) th leaching device, and the lower port of the nth conveying pipe is communicated with the feed hole of the nth leaching device; the upper port of the (n + 1) th conveying pipe is communicated with the discharge hole of the nth leaching device, and the lower port of the (n + 1) th conveying pipe is communicated with a thickener in the next working procedure; a gate valve is arranged at the position, close to the upper port, of each material conveying pipe.
Each leaching device is internally provided with a steam conveying branch pipe, the input end of each steam conveying branch pipe is respectively communicated with a steam conveying pipe, and the output end of each steam conveying branch pipe is positioned above the conveying port of the conveying pipe in the corresponding leaching device; the distance l between each steam delivery branch pipe and the inner wall of the corresponding leaching device b ＝(1/10～1/8)D。
The n leaching devices are the same and respectively comprise a tank body, a cover plate, a driving motor, an inclined blade type stirrer, a six-straight-blade turbine stirrer and an acid adding tank.
The tank body is cylindrical and has a heighth = (4/3 to 3/2) D; a feed inlet is arranged on one side of the tank body, and the distance l between the feed inlet and the bottom is j H is not less than 1/10 and not more than 1/4; a discharge port is arranged at the other side of the tank body, and the distance l between the discharge port and the bottom is c H is not less than 3/4 and not more than 4/5; the bottom center of the tank body is provided with a spherical boss, and the diameter d of the bottom of the spherical boss q = 2/5-2/3D, spherical boss height h q ＝(1/10～2/5)D。
A cover plate is fixed at the upper end of the tank body, a driving motor is arranged at the center of the cover plate, the driving motor is connected with the upper end of a stirring shaft (14) through a coupler, and the lower end of the stirring shaft penetrates through the cover plate and is arranged in the tank body; the middle part of the stirring shaft is provided with an inclined blade type stirrer, and the lower end of the stirring shaft is fixedly connected with a six-straight-blade turbine stirrer through a propeller hub; wherein:
diameter average d of inclined blade type stirrer and six straight blade turbine stirrer j ＝(1/3～2/3)D；
Distance l between six straight blade turbine stirrer and top of spherical boss t ＝(1/20～1/8)h；
Distance l between inclined blade type stirrer and six straight blade turbine stirrer j ＝(1/5～1/3)h。
The outlet and the inlet of the acid adding tank are correspondingly and fixedly connected with the lower section and the upper section of the acid adding pipe, the lower section of the acid adding pipe penetrates through the cover plate 9 and is arranged in the tank body, the lower section of the acid adding pipe is positioned on one side of the cover plate, and the upper section of the acid adding pipe is externally connected with a corresponding acid source; the lower section and the upper section of the acid adding pipe are respectively provided with a butterfly valve.
And a sealing ring is arranged between the upper end of the tank body and the cover plate.
The distance l between the acid adding pipe and the inner wall of the tank body s ＝(1/10～1/8)D；
The leaching device and the conveying pipeline are both made of acid-resistant steel.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following positive effects:
1. the n leaching devices are sequentially arranged in a step shape, and adjacent leaching devices are communicated through a conveying pipe; each leaching device is respectively communicated with a steam conveying pipe, a spherical boss is arranged at the center of the bottom of a tank body of each leaching device, an inclined blade type stirrer and a six-straight blade turbine stirrer are arranged in the tank body, a discharge port of the last leaching device is communicated with a thickener of the next working procedure, and each leaching device system is simple in structure and beneficial to continuous production.
2. The spherical boss is arranged at the bottom of the tank body, so that the distribution characteristic of a flow field in the tank body is improved, the turbulent kinetic energy in the tank body reaches the upper half part in the tank body, and the turbulent kinetic energy is distributed at the junction part of the bottom of the tank body and the wall of the tank body, so that the turbulent kinetic energy in the tank body is larger and wider in distribution, the leaching strength is further improved, and the deposition of minerals in the tank body is effectively relieved. And the distance between the stirrer and the stirrer is shortened, so that the stirring power is reduced, and the energy consumption is saved. Because of the zigzag of the bottom shape of the tank body, the turning of the fluid flow is more violent than the fluid flow of the existing tank body, and the generated speed fluctuation is large, so the mineral speed distribution of the invention is more beneficial to the mixing of solid and liquid phases, the mixing is uniform, and the problem of mineral deposition at the bottom of the tank can be effectively solved.
3. The paddle of the stirring device adopted by the invention is a stirring paddle which is inclined upwards and straight downwards, namely the six-straight-blade turbine stirrer adopted at the lower part can ensure that the ore pulp is distributed more uniformly, the inclined-blade stirrer at the upper part enhances the axial flow of a liquid phase, so that a flow field in the tank body is in a state of being turned over up and down, a larger circulating flow is formed, the flow field not only ensures the uniformity of mineral mixing, but also is beneficial to the flowing effect of the ore pulp among the cascade tank bodies, the working efficiency of the cascade continuous leaching tank is improved, and the leaching strength is high.
4. According to the invention, the ore pulp is heated by adopting a ventilation heating mode, the gas outlet and the discharge port are both positioned near the six-straight-blade turbine stirrer, steam and minerals in the stirring tank body of the six-straight-blade turbine stirrer have a better dispersion effect, and the ore pulp in the tank body is heated more uniformly due to the fact that the flow field near the lower-layer inclined-blade stirrer has zigzag property, so that the leaching rate can be effectively improved.
Therefore, the invention has the characteristics of uniform mixing, less mineral deposition, high leaching strength, low energy consumption and continuous production.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is another schematic structural view of the present invention;
FIG. 3 is a schematic view of another embodiment of the present invention;
fig. 4 is an enlarged schematic view of the leaching device 1 in fig. 1 to 3.
Detailed Description
The technical solutions of the present invention will be further described with reference to the accompanying drawings and the detailed description, but the present invention is not limited to the scope of the present invention.
A vanadium shale step continuous leaching system.
As shown in fig. 1, the vanadium shale step continuous leaching system according to the present embodiment includes n leaching devices 1, a steam delivery pipe 5, n steam delivery branch pipes 4, and n +1 delivery pipes 2.
As shown in figure 1, the vanadium shale cascade continuous leaching system adopts the height difference delta h between adjacent leaching devices 1 1 And the materials are sequentially arranged in a step shape from 3/4 to 1/2 h.
As shown in fig. 1, the upper port of the 1 st feed delivery pipe 2 is communicated with an external bin, and the lower port of the 1 st feed delivery pipe 2 is communicated with the feed inlet of the 1 st leaching device 1; the upper port of the 2 nd conveying pipe 2 is communicated with the discharge hole of the 1 st leaching device 1, and the lower port of the 2 nd conveying pipe 2 is communicated with the feed hole of the 2 nd leaching device 1; by parity of reasoning, the upper port of the nth material conveying pipe 2 is communicated with the discharge hole of the (n-1) th leaching device 1, and the lower port of the nth material conveying pipe 2 is communicated with the feed hole of the nth leaching device 1; the upper port of the (n + 1) th delivery pipe 2 is communicated with the discharge hole of the nth leaching device 1, and the lower port of the (n + 1) th delivery pipe 2 is communicated with a thickener in the next working procedure; a gate valve 3 is arranged at the position, close to the upper port, of each material conveying pipe 2.
As shown in fig. 1, each leaching device 1 is internally provided with a steam conveying branch pipe 4, the input end of each steam conveying branch pipe 4 is respectively communicated with a steam conveying pipe 5, and the output end of each steam conveying branch pipe 4 is positioned above the conveying port of the conveying pipe 2 in the corresponding leaching device 1; each steam delivery branch pipe 4 and the corresponding leaching deviceDistance l of inner wall of 1 b ＝(1/10～1/8)D。
As shown in fig. 4, the n leaching devices 1 are the same, and each leaching device comprises a tank 8, a cover plate 9, a driving motor 10, an inclined-blade stirrer 7, a six-straight-blade turbine stirrer 6 and an acid tank 12.
As shown in fig. 4, the can body 8 is cylindrical, and the height h = (4/3 to 3/2) D of the can body 8; a feed inlet is arranged at one side of the tank body 8, and the distance l between the feed inlet and the bottom j H is not less than 1/10 and not more than 1/4; a discharge port is arranged at the other side of the tank body 8, and the distance l between the discharge port and the bottom is c H is not less than 3/4 and not more than 4/5; the bottom center of the tank body 8 is provided with a spherical boss 16, and the diameter d of the bottom of the spherical boss 16 q = 2/5-2/3D, height h of spherical boss 16 q ＝(1/10～2/5)D。
As shown in fig. 4, a cover plate 9 is fixed at the upper end of the tank 8, a driving motor 10 is installed at the center of the cover plate 9, the driving motor 10 is connected with the upper end of a stirring shaft (14) through a coupler, and the lower end of the stirring shaft 14 penetrates through the cover plate 9 and is arranged in the tank 8; the middle part of the stirring shaft 14 is provided with an inclined blade type stirrer 7, and the lower end of the stirring shaft 14 is fixedly connected with a six-straight-blade turbine stirrer 6 through a propeller hub 15; wherein:
the diameter of the inclined blade type stirrer 7 and the diameter of the six straight blade turbine stirrer 6 are both d j ＝(1/3～2/3)D；
Distance l between six straight blade turbine stirrers 6 and top of spherical boss 16 t ＝(1/20～1/8)h；
Distance l between inclined blade type stirrer 7 and six straight blade turbine stirrer 6 j ＝(1/5～1/3)h。
As shown in fig. 4, the outlet and the inlet of the acid tank 12 are correspondingly and fixedly connected with the lower section and the upper section of the acid adding pipe 13, the lower section of the acid adding pipe 13 passes through the cover plate 9 and is arranged in the tank body 8, the lower section of the acid adding pipe 13 is arranged at one side of the cover plate 9, and the upper section of the acid adding pipe 13 is externally connected with a corresponding acid source; the lower section and the upper section of the acid adding pipe 13 are respectively provided with a butterfly valve 11.
The distance l between the acid adding pipe 13 and the inner wall of the tank body 8 s ＝(1/10～1/8)D；
In this embodiment:
n represents the number of the leaching devices 1, the steam conveying branch pipes 4 and the material conveying pipes 2, and n is a natural number of 2-10;
h represents the height of the tank 8 in the leaching device 1 in mm;
d represents the diameter of the tank 8 in mm in the leaching apparatus 1.
And a sealing ring is arranged between the upper end of the tank body 8 and the cover plate 9.
The leaching device 1 and the material of the material conveying pipe 2 are both acid-resistant steel.
The description of the embodiments is omitted.
Example 1
A vanadium shale step continuous leaching system.
As shown in FIG. 2, the vanadium shale step continuous leaching system comprises 4 leaching devices 1, a steam conveying pipe 5, 4 steam conveying branch pipes 4 and 5 conveying pipes 2.4 leaching devices 1 are arranged with a height difference deltah between adjacent leaching devices 1 1 And the =3/4h are arranged in a step shape in sequence.
As shown in fig. 2, the upper port of the 1 st feed delivery pipe 2 is communicated with an external bin, and the lower port of the 1 st feed delivery pipe 2 is communicated with the feed inlet of the 1 st leaching device 1; the upper port of the 2 nd conveying pipe 2 is communicated with the discharge hole of the 1 st leaching device 1, and the lower port of the 2 nd conveying pipe 2 is communicated with the feed hole of the 2 nd leaching device 1; by analogy, the upper port of the 4 th conveying pipeline 2 is communicated with the discharge hole of the 3 rd leaching device 1, and the lower port of the 4 th conveying pipeline 2 is communicated with the feed hole of the 4 th leaching device 1; the upper port of the 5 th conveying pipe 2 is communicated with the discharge hole of the 4 th leaching device 1, and the lower port of the 5 th conveying pipe 2 is communicated with a thickener in the next working procedure; a gate valve 3 is arranged at the position, close to the upper port, of each material conveying pipe 2.
As shown in fig. 2, each leaching device 1 is internally provided with a steam conveying branch pipe 4, the input end of each steam conveying branch pipe 4 is respectively communicated with a steam conveying pipe 5, and the output end of each steam conveying branch pipe 4 is positioned above the conveying port of the conveying pipe 2 in the corresponding leaching device 1; the distance l between each steam delivery branch pipe 4 and the inner wall of the corresponding leaching device 1 b ＝1/10D。
As shown in fig. 4, the 4 leaching devices 1 are the same and each comprise a tank 8, a cover plate 9, a driving motor 10, an inclined blade type stirrer 7, a six-straight blade turbine stirrer 6 and an acid adding tank 12.
As shown in fig. 4, the tank 8 is cylindrical, and the height h =4/3D of the tank 8; a feed inlet is arranged at one side of the tank body 8, and the distance l between the feed inlet and the bottom j =1/10h; a discharge port is arranged at the other side of the tank body 8, and the distance l between the discharge port and the bottom is c =3/4h; the bottom center of the tank body 8 is provided with a spherical boss 16, and the diameter d of the bottom of the spherical boss 16 q =2/5D, height h of spherical boss 16 q ＝1/10D。
As shown in fig. 4, a cover plate 9 is fixed at the upper end of the tank 8, a driving motor 10 is installed at the center of the cover plate 9, the driving motor 10 is connected with the upper end of a stirring shaft (14) through a coupler, and the lower end of the stirring shaft 14 penetrates through the cover plate 9 and is arranged in the tank 8; the middle part of the stirring shaft 14 is provided with an inclined blade type stirrer 7, and the lower end of the stirring shaft 14 is fixedly connected with a six-straight-blade turbine stirrer 6 through a propeller hub 15; wherein:
the diameter of the inclined blade type stirrer 7 and the diameter of the six straight blade turbine stirrer 6 are equal to each other j ＝1/3D；
Distance l between six straight blade turbine stirrers 6 and top of spherical boss 16 t ＝1/20h；
Distance l between inclined blade type stirrer 7 and six straight blade turbine stirrer 6 j ＝1/5h。
As shown in fig. 4, the outlet and the inlet of the acid adding tank 12 are correspondingly and fixedly connected with the lower section and the upper section of the acid adding pipe 13, the lower section of the acid adding pipe 13 passes through the cover plate 9 and is arranged in the tank body 8, the lower section of the acid adding pipe 13 is arranged at one side of the cover plate 9, and the upper section of the acid adding pipe 13 is externally connected with a corresponding acid source; the lower section and the upper section of the acid adding pipe 13 are respectively provided with a butterfly valve 11.
The distance l between the acid adding pipe 13 and the inner wall of the tank body 8 s ＝1/10D；
Example 2
A vanadium shale step continuous leaching system.
As shown in FIG. 3, the vanadium shale step continuous leaching system comprises 2 leaching devices 1, a steam conveying pipe 5, 2 steam conveying branch pipes 4 and 3 conveying pipes 2.2 leaching devices 1 are composed in a step shape, and 2 leaching devicesHeight difference Δ h between 1 1 ＝5/8h。
As shown in fig. 3, the upper port of the 1 st feed delivery pipe 2 is communicated with an external bin, and the lower port of the 1 st feed delivery pipe 2 is communicated with the feed inlet of the 1 st leaching device 1; the upper port of the 2 nd conveying pipe 2 is communicated with the discharge hole of the 1 st leaching device 1, and the lower port of the 2 nd conveying pipe 2 is communicated with the feed hole of the 2 nd leaching device 1; the upper port of the 3 rd material conveying pipe 2 is communicated with the discharge hole of the 2 nd leaching device 1, and the lower port of the 3 rd material conveying pipe 2 is communicated with a thickener in the next working procedure. A gate valve 3 is arranged at the position, close to the upper port, of each material conveying pipe 2.
As shown in fig. 3, each leaching device 1 is internally provided with a steam conveying branch pipe 4, the input end of each steam conveying branch pipe 4 is respectively communicated with a steam conveying pipe 5, and the output end of each steam conveying branch pipe 4 is positioned above the conveying port of the conveying pipe 2 in the corresponding leaching device 1; the distance l between each steam delivery branch pipe 4 and the inner wall of the corresponding leaching device 1 b ＝1/9D。
As shown in fig. 4, the 2 leaching devices 1 are the same and each comprise a tank 8, a cover plate 9, a driving motor 10, an inclined blade type stirrer 7, a six-straight blade turbine stirrer 6 and an acid adding tank 12.
As shown in fig. 4, the tank 8 is cylindrical, and the height h =7/5D of the tank 8; a feed inlet is arranged at one side of the tank body 8, and the distance l between the feed inlet and the bottom j =1/6h; a discharge port is arranged at the other side of the tank body 8, and the distance l between the discharge port and the bottom is c =3/4h; the bottom center of the tank body 8 is provided with a spherical boss 16, and the diameter d of the bottom of the spherical boss 16 q =1/2D, height h of spherical boss 16 q ＝1/5D。
As shown in fig. 4, a cover plate 9 is fixed at the upper end of the tank 8, a driving motor 10 is installed at the center of the cover plate 9, the driving motor 10 is connected with the upper end of a stirring shaft (14) through a coupler, and the lower end of the stirring shaft 14 penetrates through the cover plate 9 and is arranged in the tank 8; the middle part of the stirring shaft 14 is provided with an inclined blade type stirrer 7, and the lower end of the stirring shaft 14 is fixedly connected with a six-straight-blade turbine stirrer 6 through a propeller hub 15; wherein:
the diameter of the inclined blade type stirrer 7 and the diameter of the six straight blade turbine stirrer 6 are equal to each other j ＝1/2D；
Distance l between six straight blade turbine stirrers 6 and top of spherical boss 16 t ＝1/10h；
Distance l between inclined blade type stirrer 7 and six straight blade turbine stirrer 6 j ＝1/4h。
As shown in fig. 4, the outlet and the inlet of the acid adding tank 12 are correspondingly and fixedly connected with the lower section and the upper section of the acid adding pipe 13, the lower section of the acid adding pipe 13 passes through the cover plate 9 and is arranged in the tank body 8, the lower section of the acid adding pipe 13 is arranged at one side of the cover plate 9, and the upper section of the acid adding pipe 13 is externally connected with a corresponding acid source; the lower section and the upper section of the acid adding pipe 13 are respectively provided with a butterfly valve 11.
The distance l between the acid adding pipe 13 and the inner wall of the tank body 8 s ＝1/9D。
Example 3
A vanadium shale step continuous leaching system.
As shown in figure 1, the vanadium shale step continuous leaching system comprises 10 leaching devices 1, a steam conveying pipe 5, 10 steam conveying branch pipes 4 and 11 conveying pipes 2. 10 leaching devices 1 are arranged with height difference deltah between adjacent leaching devices 1 1 And the 1/2h are arranged in a stepped manner in sequence.
As shown in fig. 1, the upper port of the 1 st feed delivery pipe 2 is communicated with an external bin, and the lower port of the 1 st feed delivery pipe 2 is communicated with the feed inlet of the 1 st leaching device 1; the upper port of the 2 nd conveying pipe 2 is communicated with the discharge hole of the 1 st leaching device 1, and the lower port of the 2 nd conveying pipe 2 is communicated with the feed hole of the 2 nd leaching device 1; by parity of reasoning, the upper port of the 10 th conveying pipe 2 is communicated with the discharge hole of the 11 th leaching device 1, and the lower port of the 11 th conveying pipe 2 is communicated with the feed hole of the 10 th leaching device 1; the upper port of the 11 th conveying pipe 2 is communicated with the discharge hole of the 10 th leaching device 1, and the lower port of the 11 th conveying pipe 2 is communicated with a thickener in the next working procedure; a gate valve 3 is arranged at the position, close to the upper port, of each material conveying pipe 2.
As shown in figure 1, each leaching device 1 is internally provided with a steam conveying branch pipe 4, the input end of each steam conveying branch pipe 4 is respectively communicated with a steam conveying pipe 5, and the output end of each steam conveying branch pipe 4 is positioned on the conveying port of the conveying pipe 2 in the corresponding leaching device 1A method for preparing; the distance l between each steam delivery branch pipe 4 and the inner wall of the corresponding leaching device 1 b ＝1/8D。
As shown in fig. 4, the 10 leaching devices 1 are the same and each comprise a tank 8, a cover plate 9, a driving motor 10, an inclined blade type stirrer 7, a six-straight blade turbine stirrer 6 and an acid adding tank 12.
As shown in fig. 4, the tank 8 is cylindrical, and the height h =3/2D of the tank 8; a feed inlet is arranged at one side of the tank body 8, and the distance l between the feed inlet and the bottom j =1/4h; a discharge port is arranged at the other side of the tank body 8, and the distance l between the discharge port and the bottom is c =4/5h; the bottom center of the tank body 8 is provided with a spherical boss 16, and the diameter d of the bottom of the spherical boss 16 q =2/3D, height h of spherical boss 16 q ＝2/5D。
As shown in fig. 4, a cover plate 9 is fixed at the upper end of the tank 8, a driving motor 10 is installed at the center of the cover plate 9, the driving motor 10 is connected with the upper end of a stirring shaft (14) through a coupler, and the lower end of the stirring shaft 14 penetrates through the cover plate 9 and is arranged in the tank 8; the middle part of the stirring shaft 14 is provided with an inclined blade type stirrer 7, and the lower end of the stirring shaft 14 is fixedly connected with a six-straight-blade turbine stirrer 6 through a propeller hub 15; wherein:
the diameter of the inclined blade type stirrer 7 and the diameter of the six straight blade turbine stirrer 6 are equal to each other j ＝2/3D；
Distance l between six straight blade turbine stirrers 6 and top of spherical boss 16 t ＝1/8h；
Distance l between inclined blade type stirrer 7 and six straight blade turbine stirrer 6 j ＝1/3h。
As shown in fig. 4, the outlet and the inlet of the acid tank 12 are correspondingly and fixedly connected with the lower section and the upper section of the acid adding pipe 13, the lower section of the acid adding pipe 13 passes through the cover plate 9 and is arranged in the tank body 8, the lower section of the acid adding pipe 13 is arranged at one side of the cover plate 9, and the upper section of the acid adding pipe 13 is externally connected with a corresponding acid source; the lower section and the upper section of the acid adding pipe 13 are respectively provided with a butterfly valve 11.
The distance l between the acid adding pipe 13 and the inner wall of the tank body 8 s ＝1/8D。
Compared with the prior art, the specific implementation mode has the following positive effects:
1. in the specific embodiment, n leaching devices 1 are sequentially arranged in a step shape, and adjacent leaching devices 1 are communicated through a material conveying pipe 2; each leaching device 1 is respectively communicated with a steam conveying pipe 5, a spherical boss 16 is arranged at the center of the bottom of a tank body 8 of each leaching device 1, an inclined-blade stirrer 7 and a six-straight-blade turbine stirrer 6 are arranged in the tank body 8, a discharge port of the last leaching device 1 is communicated with a thickener of the next process, and each leaching device 1 system is simple in structure and beneficial to continuous production.
2. In the specific embodiment, the spherical boss 16 is arranged at the bottom of the tank body 8, so that the distribution characteristic of the flow field in the tank body 8 is improved, the turbulent kinetic energy in the tank body 8 reaches the upper half part in the tank body, and the turbulent kinetic energy is distributed at the junction part of the bottom of the tank body 8 and the tank wall, so that the turbulent kinetic energy in the tank is larger and wider in distribution, the leaching strength is further improved, and the deposition of minerals in the tank body 8 is effectively relieved. And the distance between the stirrer and the stirring device is shortened, so that the stirring power is reduced, and the energy consumption is saved. Because of the zigzag shape of the bottom of the tank body 8, the turning of the flowing fluid is more violent than the flowing fluid of the existing tank body 8, and the generated speed fluctuation is large, so the mineral speed distribution of the embodiment is more beneficial to the mixing of solid and liquid phases, the mixing is uniform, and the problem of mineral deposition at the bottom of the tank can be effectively solved.
3. The paddle of the stirring device adopted by the embodiment is a stirring paddle which is inclined upwards and straight downwards, namely, the six-straight-blade turbine stirrer 6 adopted at the lower part can enable ore pulp to be distributed more uniformly, the inclined-blade stirrer 7 at the upper part enhances the axial flow of a liquid phase, so that a flow field in the tank body 8 is in an up-and-down overturning state, a larger circulating flow is formed, the flow field ensures the uniformity of mineral mixing, the flowing effect of the ore pulp among the step tank bodies 8 is facilitated, the working efficiency of the step continuous leaching tank is improved, and the leaching strength is high.
4. This embodiment adopts the heating mode of ventilating to heat the ore pulp, and gas outlet and discharge gate all are located near six straight leaf turbine agitator 6 positions, and steam and mineral have better dispersion effect in the agitator tank body 8 through six straight leaf turbine agitator 6, and owing to have the zigzag nature in the near flow field of lower floor inclined blade agitator 7 for the ore pulp heating of jar body 8 is more even, thereby can effectively improve the leaching rate.
Therefore, the embodiment has the characteristics of uniform mixing, less mineral deposition, high leaching strength, low energy consumption and continuous production.
Claims (4)
1. The vanadium shale step continuous leaching system is characterized in that: the vanadium shale step continuous leaching system comprises n leaching devices (1), a steam conveying pipe (5), n steam conveying branch pipes (4) and n +1 conveying pipes (2);
for simplicity, the following letters will be described in a unified manner:
n represents the number of the leaching devices (1), the steam conveying branch pipes (4) and the conveying pipes (2), and n is a natural number of 2-10;
h represents the height of the tank (8) in the leaching device (1) and the unit is mm;
d represents the diameter of the tank body (8) in the leaching device (1) and the unit is mm;
the vanadium shale step continuous leaching system uses the height difference delta h between adjacent leaching devices (1) 1 The = (3/4-1/2) h are arranged in a step shape in sequence;
the upper port of the 1 st material conveying pipe (2) is communicated with an external bin, and the lower port of the 1 st material conveying pipe (2) is communicated with the feed inlet of the 1 st leaching device (1); the upper port of the 2 nd conveying pipe (2) is communicated with the discharge hole of the 1 st leaching device (1), and the lower port of the 2 nd conveying pipe (2) is communicated with the feed hole of the 2 nd leaching device (1); by parity of reasoning, the upper port of the nth conveying pipe (2) is communicated with the discharge hole of the (n-1) th leaching device (1), and the lower port of the nth conveying pipe (2) is communicated with the feed hole of the nth leaching device (1); the upper port of the (n + 1) th conveying pipe (2) is communicated with the discharge hole of the (n) th leaching device (1), and the lower port of the (n + 1) th conveying pipe (2) is communicated with a thickener in the next working procedure; a gate valve (3) is arranged at the position, close to the upper port, of each material conveying pipe (2);
each leaching device (1) is internally provided with a steam conveying branch pipe (4), the input end of each steam conveying branch pipe (4) is respectively communicated with a steam conveying pipe (5), and the output end of each steam conveying branch pipe (4) is positioned at the position of the steam conveying branch pipeThe upper part of a material conveying opening of a material conveying pipe (2) in the corresponding leaching device (1); the distance l between each steam delivery branch pipe (4) and the inner wall of the corresponding leaching device (1) b ＝(1/10～1/8)D；
The n leaching devices (1) are the same and respectively comprise a tank body (8), a cover plate (9), a driving motor (10), an inclined blade type stirrer (7), a six-straight-blade turbine stirrer (6) and an acid adding tank (12);
the tank body (8) is cylindrical, and the height h of the tank body (8) is not= (4/3-3/2) D; a feed inlet is arranged on one side of the tank body (8), and the distance l between the feed inlet and the bottom is j H is (1/10-1/4); a discharge port is arranged at the other side of the tank body (8), and the distance l between the discharge port and the bottom is c H is not less than 3/4 and not more than 4/5; a spherical boss (16) is arranged at the center of the bottom of the tank body (8), and the diameter d of the bottom of the spherical boss (16) q = 2/5-2/3D, height h of spherical boss (16) q ＝(1/10～2/5)D；
A cover plate (9) is fixed at the upper end of the tank body (8), a driving motor (10) is installed at the central position of the cover plate (9), the driving motor (10) is connected with the upper end of a stirring shaft (14) through a coupler, and the lower end of the stirring shaft (14) penetrates through the cover plate (9) and is arranged in the tank body (8); the middle part of the stirring shaft (14) is provided with an inclined blade type stirrer (7), and the lower end of the stirring shaft (14) is fixedly connected with a six-straight-blade turbine stirrer (6) through a propeller hub (15); wherein:
the diameters of the inclined blade type stirrer (7) and the six straight blade turbine stirrer (6) are d j ＝(1/3～2/3)D,
Distance l between six straight blade turbine stirrers (6) and top of spherical boss (16) t ＝(1/20～1/8)h，
The distance l between the inclined blade type stirrer (7) and the six straight blade turbine stirrer (6) j ＝(1/5～1/3)h；
The outlet and the inlet of the acid adding tank (12) are correspondingly and fixedly connected with the lower section and the upper section of the acid adding pipe (13), the lower section of the acid adding pipe (13) penetrates through the cover plate 9 to be arranged in the tank body (8), the lower section of the acid adding pipe (13) is positioned on one side of the cover plate (9), and the upper section of the acid adding pipe (13) is externally connected with a corresponding acid source; the lower section and the upper section of the acid adding pipe (13) are respectively provided with a butterfly valve (11).
2. The vanadium shale step continuous leaching system according to claim 1, wherein a sealing ring is arranged between the upper end of the tank body (8) and the cover plate (9).
3. The vanadium shale step continuous leaching system according to claim 1, wherein the distance b between the acid adding pipe (13) and the inner wall of the tank body (8) is 2 ＝(1/10～1/8)D。
4. The vanadium shale step continuous leaching system according to claim 1, wherein the leaching device (1) and the conveying pipeline (2) are both made of acid-proof steel.
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| CN202211230520.2A CN115679126A (en) | 2022-10-08 | 2022-10-08 | Vanadium shale step continuous leaching system |
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| CN202211230520.2A CN115679126A (en) | 2022-10-08 | 2022-10-08 | Vanadium shale step continuous leaching system |
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