CN111036108A - Fast and continuous preparation system for heap leaching immersion liquid of hard rock uranium mine - Google Patents
Fast and continuous preparation system for heap leaching immersion liquid of hard rock uranium mine Download PDFInfo
- Publication number
- CN111036108A CN111036108A CN201911231934.5A CN201911231934A CN111036108A CN 111036108 A CN111036108 A CN 111036108A CN 201911231934 A CN201911231934 A CN 201911231934A CN 111036108 A CN111036108 A CN 111036108A
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- China
- Prior art keywords
- sulfuric acid
- concentrated sulfuric
- liquid
- tail liquid
- pipeline
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 title claims abstract description 102
- 238000002386 leaching Methods 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 18
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000011435 rock Substances 0.000 title claims abstract description 17
- 238000007654 immersion Methods 0.000 title claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000001179 sorption measurement Methods 0.000 claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000003595 mist Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/883—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using flow rate controls for feeding the substances
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
The invention relates to the technical field of hard rock uranium mine dump leaching production, and particularly discloses a rapid and continuous preparation system of hard rock uranium mine dump leaching liquid, wherein when the system works, an electric absorption tail liquid switching valve is firstly opened, so that absorption tail liquid in an absorption tail liquid collecting tank enters a pipeline mixer; according to the concentration of the mixed liquid fed back by the leaching liquid concentration meter, the opening degree of the concentrated sulfuric acid regulating valve is calculated and adjusted through a control algorithm, and the concentrated sulfuric acid in the concentrated sulfuric acid storage tank is added, so that the adsorption tail liquid and the concentrated sulfuric acid are uniformly mixed when passing through the pipeline mixer. The invention realizes the rapid and continuous preparation of the heap leaching solution, and the production time and the cost are reduced by 80 percent; the acid preparation precision is greatly improved to +/-5%, the acidity adjustable range reaches the expected technical index, and the process requirements are completely met.
Description
Technical Field
The invention belongs to the technical field of hard rock uranium mine dump leaching production, and particularly relates to a rapid and continuous preparation system of dump leaching immersion liquid of a hard rock uranium mine.
Background
The preparation of uranium mine dump leaching solution generally adopts the mode of preparation pond stirring, adds concentrated sulfuric acid after pouring water into the preparation pond, after the stirring of a certain time, carries the elevated tank through the delivery pump to form secondary stirring in the transportation process, obtain required leaching solution.
The main problems of the above process are: the preparation process of the leaching solution is discontinuous, the stirring time is long, and the efficiency is low; the preparation precision of the leaching solution is low, the acid consumption is large, and the method is uneconomical; the concentration of the produced leaching liquid is not balanced, so that the subsequent process is influenced; the characteristics of large system inertia and long feedback time in the preparation process cannot be changed, and automatic production is difficult to realize; the stirring pool generates evaporation acid mist, which has certain influence on the environment.
Therefore, it is desirable to design a new preparation method of heap leachate to solve the above problems.
Disclosure of Invention
The invention aims to provide a rapid and continuous preparation system for dump leaching immersion liquid of a hard rock uranium mine, which realizes uniform mixing of the immersion liquid in a pipeline.
The technical scheme of the invention is as follows:
a rapid and continuous preparation system for leaching liquid in dump leaching of hard rock uranium mine comprises a conveying pipeline, an acid distribution pipeline, a control unit, an adsorption tail liquid collecting tank, an adsorption tail liquid electromagnetic flow meter, an adsorption tail liquid electric switch valve, a concentrated sulfuric acid regulating valve, a concentrated sulfuric acid electromagnetic flow meter, a pipeline mixer, a leaching liquid concentration meter, a leaching liquid storage tank and a concentrated sulfuric acid storage tank;
one end of the conveying pipeline is communicated with the adsorption tail liquid collecting tank, and the other end of the conveying pipeline is communicated with the leaching liquid storage pool; an absorption tail liquid electromagnetic flowmeter, an absorption tail liquid electric switch valve and a leaching liquid concentration meter are sequentially arranged on the conveying pipeline;
a pipeline mixer is arranged on a conveying pipeline between the adsorption tail liquid electric switch valve and the leaching liquid concentration meter, and an acid mixing pipeline is led out from the pipeline mixer and communicated with a concentrated sulfuric acid storage tank;
the pipeline mixer is used for realizing uniform fusion of the mixed liquid in the transmission process;
the acid preparation pipeline is provided with a concentrated sulfuric acid regulating valve and a concentrated sulfuric acid electromagnetic flow meter;
and the control unit reads the data of the adsorption tail liquid electromagnetic flow meter, the concentrated sulfuric acid electromagnetic flow meter and the leaching liquid concentration meter on line and monitors the on-off states of the adsorption tail liquid electric switch valve and the concentrated sulfuric acid regulating valve.
Still include concentrated sulfuric acid governing valve and pipeline mixer between install the check valve additional, prevent that water from flowing backward into concentrated sulfuric acid storage tank.
In order to ensure the mixing quality, the distance between the electric switch valve for adsorbing the tail liquid and the pipeline mixer is within the range of 0.5-1 m.
In order to ensure the measurement precision of the instrument, the distance between the leaching solution concentration meter and the outlet of the pipeline mixer is within the range of 1-1.5 meters.
When the system works, the electric switch valve for adsorbing the tail liquid is firstly opened, so that the adsorbing tail liquid in the adsorbing tail liquid collecting tank enters the pipeline mixer; according to the concentration of the mixed liquid fed back by the leaching liquid concentration meter, the opening degree of the concentrated sulfuric acid regulating valve is calculated and adjusted through a control algorithm, and the concentrated sulfuric acid in the concentrated sulfuric acid storage tank is added, so that the adsorption tail liquid and the concentrated sulfuric acid are uniformly mixed when passing through the pipeline mixer.
When the system works, the minimum flow velocity of the adsorption tail liquid is controlled to be not lower than 0.75m/s, otherwise, the electric switch valve of the adsorption tail liquid is closed, and the system stops working and enters an alarm state.
When a fault is detected in the working process of the system, the concentrated sulfuric acid regulating valve is closed firstly, and then the electric switch valve for adsorbing the tail liquid is closed.
When the system finishes working, the concentrated sulfuric acid regulating valve is closed firstly, and then the electric switch valve for adsorbing tail liquid is closed.
The invention has the following remarkable effects:
(1) the invention adopts a static pipeline mixer to replace a liquid preparation pool and a stirring process, realizes the uniform mixing of the prepared liquid in the pipeline, and realizes the accurate automatic adjustment of acidity by matching with an advanced fuzzy algorithm.
(2) The invention realizes the rapid and continuous preparation of the heap leaching solution, and the production time and the cost are reduced by 80 percent; the acid preparation precision is greatly improved to +/-5%, the acidity adjustable range reaches the expected technical index, and the process requirements are completely met.
(3) The invention realizes unattended operation of the leaching solution preparation process, greatly reduces the labor cost of operation and maintenance, and reduces the construction cost of the production line of the heap leaching solution acid preparation process.
(4) The invention avoids acid mist emission, reduces facility corrosion, ensures the occupational health condition of workers and improves the environment-friendly level of the process.
Drawings
FIG. 1 is a schematic diagram of a complex acid control system.
In the figure: 1. a control unit; 2. an adsorption tail liquid collecting tank; 3. an adsorption tail liquid electromagnetic flowmeter; 4. an electric switch valve for adsorbing tail liquid; 5. a check valve; 6. a concentrated sulfuric acid regulating valve; 7. concentrated sulfuric acid electromagnetic flow meter; 8. a pipeline mixer; 9. a leaching liquid concentration meter; 10. a leaching liquid storage pool; 11. concentrated sulfuric acid storage tank.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The system for rapidly and continuously preparing leaching liquid in dump leaching of uranium hard rock mine as shown in fig. 1 comprises a conveying pipeline, an acid preparation pipeline, a control unit 1, an adsorption tail liquid collecting tank 2, an adsorption tail liquid electromagnetic flow meter 3, an adsorption tail liquid electric switch valve 4, a check valve 5, a concentrated sulfuric acid regulating valve 6, a concentrated sulfuric acid electromagnetic flow meter 7, a pipeline mixer 8, a leaching liquid concentration meter 9, a leaching liquid storage tank 10 and a concentrated sulfuric acid storage tank 11.
One end of the conveying pipeline is communicated with the adsorption tail liquid collecting tank 2, and the other end of the conveying pipeline is communicated with the leaching liquid storage pool 10. And the delivery pipeline is sequentially provided with an adsorption tail liquid electromagnetic flowmeter 3, an adsorption tail liquid electric switch valve 4 and a leaching liquid concentration meter 9.
A pipeline mixer 8 is arranged on a conveying pipeline between the adsorption tail liquid electric switch valve 4 and the leaching liquid concentration meter 9, and an acid preparation pipeline is led out from the pipeline mixer 8 and communicated with a concentrated sulfuric acid storage tank 11. The pipeline mixer 8 is used for realizing the uniform fusion of the mixed liquid in the transmission process.
And a concentrated sulfuric acid regulating valve 6 and a concentrated sulfuric acid electromagnetic flow meter 7 are arranged on the acid distribution pipeline.
And the control unit 1 reads the data of the adsorption tail liquid electromagnetic flow meter 3, the concentrated sulfuric acid electromagnetic flow meter 7 and the leaching liquid concentration meter 9 on line and monitors the on-off states of the adsorption tail liquid electric switch valve 4 and the concentrated sulfuric acid regulating valve 6.
When the system works, the electric switch valve 4 for adsorbing the tail liquid is firstly opened, so that the adsorption tail liquid in the adsorption tail liquid collecting tank 2 enters the pipeline mixer 8, the minimum flow rate of the adsorption tail liquid is not lower than 0.75m/s, otherwise, the electric switch valve 4 for adsorbing the tail liquid is closed, and the system stops working and enters an alarm state; according to the concentration of the mixed liquid fed back by the leaching liquid concentration meter 9, the opening degree of the concentrated sulfuric acid regulating valve 6 is calculated and adjusted through a control algorithm, and the concentrated sulfuric acid in the concentrated sulfuric acid storage tank 11 is added, so that the adsorption tail liquid and the concentrated sulfuric acid are uniformly mixed when passing through the pipeline mixer 8.
In order to ensure the safety of equipment, the opening and closing sequence of the valves must be controlled, when the system finishes working, the concentrated sulfuric acid regulating valve 6 is closed firstly, and then the electric absorption tail liquid switch valve 4 is closed; when a fault is detected in the working process of the system, the concentrated sulfuric acid regulating valve 6 is closed firstly, and then the electric switch valve 4 for adsorbing the tail liquid is closed.
In order to ensure the safety, a check valve 5 is additionally arranged between the concentrated sulfuric acid regulating valve 6 and the pipeline mixer 8 to prevent water from flowing backwards into the concentrated sulfuric acid storage tank 11.
In order to ensure the mixing quality, the distance between the adsorption tail liquid electric switch valve 4 and the pipeline mixer 8 is controlled within the range of 0.5-1 m.
In order to ensure the measurement precision of the instrument, the distance from the leaching solution concentration meter 9 to the outlet of the pipeline mixer 8 is controlled within the range of 1-1.5 meters.
Claims (8)
1. The utility model provides a system is prepared in succession fast to hard rock uranium mine dump leaching immersion fluid which characterized in that: comprises a conveying pipeline, an acid distribution pipeline, a control unit (1), an adsorption tail liquid collecting tank (2), an adsorption tail liquid electromagnetic flowmeter (3), an adsorption tail liquid electric switch valve (4), a concentrated sulfuric acid regulating valve (6), a concentrated sulfuric acid electromagnetic flowmeter (7), a pipeline mixer (8), a leaching solution concentration meter (9), a leaching solution storage pool (10) and a concentrated sulfuric acid storage tank (11);
one end of the conveying pipeline is communicated with the adsorption tail liquid collecting tank (2), and the other end of the conveying pipeline is communicated with the leaching liquid storage pool (10); an absorption tail liquid electromagnetic flowmeter (3), an absorption tail liquid electric switch valve (4) and a leaching liquid concentration meter (9) are sequentially arranged on the conveying pipeline;
a pipeline mixer (8) is arranged on a conveying pipeline between the adsorption tail liquid electric switch valve (4) and the leaching liquid concentration meter (9), an acid preparation pipeline is led out from the pipeline mixer (8) and is communicated with a concentrated sulfuric acid storage tank (11);
the pipeline mixer (8) is used for realizing the uniform fusion of the mixed liquid in the transmission process;
a concentrated sulfuric acid regulating valve (6) and a concentrated sulfuric acid electromagnetic flow meter (7) are arranged on the acid preparation pipeline;
the data of the adsorption tail liquid electromagnetic flow meter (3), the concentrated sulfuric acid electromagnetic flow meter (7) and the leaching liquid concentration meter (9) are read on line through the control unit (1), and the on-off states of the adsorption tail liquid electric switch valve (4) and the concentrated sulfuric acid regulating valve (6) are monitored.
2. The system for rapidly and continuously preparing dump leaching solution for a hard rock uranium mine according to claim 1, wherein: the device also comprises a check valve (5) which is additionally arranged between the concentrated sulfuric acid regulating valve (6) and the pipeline mixer (8) and used for preventing water from flowing back into the concentrated sulfuric acid storage tank (11).
3. The system for rapidly and continuously preparing dump leaching solution for a hard rock uranium mine according to claim 1, wherein: in order to ensure the mixing quality, the distance between the electric switch valve (4) for adsorbing the tail liquid and the pipeline mixer (8) is within the range of 0.5-1 meter.
4. The system for rapidly and continuously preparing dump leaching solution for a hard rock uranium mine according to claim 1, wherein: in order to ensure the measurement precision of the instrument, the distance from the leaching solution concentration meter (9) to the outlet of the pipeline mixer (8) is within the range of 1-1.5 meters.
5. The rapid and continuous preparation system of the dump leaching immersion liquid of the hard rock uranium mine according to any one of claims 1 to 4, wherein: when the system works, the electric switch valve (4) for adsorbing the tail liquid is firstly opened, so that the adsorbing tail liquid in the adsorbing tail liquid collecting tank (2) enters the pipeline mixer (8); according to the concentration of the mixed liquid fed back by the leaching liquid concentration meter (9), the opening degree of the concentrated sulfuric acid regulating valve (6) is calculated and adjusted through a control algorithm, and concentrated sulfuric acid in the concentrated sulfuric acid storage tank (11) is added, so that the adsorption tail liquid and the concentrated sulfuric acid are uniformly mixed when passing through the pipeline mixer (8).
6. The system for rapidly and continuously preparing dump leaching solution for a hard rock uranium mine according to claim 5, wherein: when the system works, the minimum flow velocity of the adsorption tail liquid is controlled to be not lower than 0.75m/s, otherwise, the electric switch valve (4) of the adsorption tail liquid is closed, and the system stops working and enters an alarm state.
7. The system for rapidly and continuously preparing dump leaching solution for a hard rock uranium mine according to claim 6, wherein: when a fault is detected in the working process of the system, the concentrated sulfuric acid regulating valve (6) is closed firstly, and then the electric switch valve (4) for adsorbing the tail liquid is closed.
8. The system for rapidly and continuously preparing dump leaching solution for a hard rock uranium mine according to claim 7, wherein: when the system finishes working, the concentrated sulfuric acid regulating valve (6) is closed firstly, and then the electric switch valve (4) for adsorbing the tail liquid is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231934.5A CN111036108A (en) | 2019-12-05 | 2019-12-05 | Fast and continuous preparation system for heap leaching immersion liquid of hard rock uranium mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231934.5A CN111036108A (en) | 2019-12-05 | 2019-12-05 | Fast and continuous preparation system for heap leaching immersion liquid of hard rock uranium mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111036108A true CN111036108A (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911231934.5A Pending CN111036108A (en) | 2019-12-05 | 2019-12-05 | Fast and continuous preparation system for heap leaching immersion liquid of hard rock uranium mine |
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| Country | Link |
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| CN (1) | CN111036108A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203803A (en) * | 2013-04-23 | 2013-07-17 | 上海三瑞高分子材料有限公司 | Multi-liquid continuous mixing device |
| CN103768989A (en) * | 2014-01-29 | 2014-05-07 | 南京金焰锶业有限公司 | Dilute sulfuric acid automatic preparation device and method |
| CN105506275A (en) * | 2015-12-15 | 2016-04-20 | 东华理工大学 | Flow uranium leaching system and flow uranium leaching process |
| CN105817175A (en) * | 2016-01-09 | 2016-08-03 | 郑州大学 | Automatic sulfuric acid blending system and control method |
| CN108993182A (en) * | 2018-08-22 | 2018-12-14 | 中国石油集团渤海钻探工程有限公司 | A kind of continuous nitration mixture acid feeding appts of polygamy side's automation |
| CN109626461A (en) * | 2018-11-13 | 2019-04-16 | 核工业北京化工冶金研究院 | A device and method for accelerated evaporation of waste liquid from acid in-situ leaching of uranium evaporation pond |
-
2019
- 2019-12-05 CN CN201911231934.5A patent/CN111036108A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203803A (en) * | 2013-04-23 | 2013-07-17 | 上海三瑞高分子材料有限公司 | Multi-liquid continuous mixing device |
| CN103768989A (en) * | 2014-01-29 | 2014-05-07 | 南京金焰锶业有限公司 | Dilute sulfuric acid automatic preparation device and method |
| CN105506275A (en) * | 2015-12-15 | 2016-04-20 | 东华理工大学 | Flow uranium leaching system and flow uranium leaching process |
| CN105817175A (en) * | 2016-01-09 | 2016-08-03 | 郑州大学 | Automatic sulfuric acid blending system and control method |
| CN108993182A (en) * | 2018-08-22 | 2018-12-14 | 中国石油集团渤海钻探工程有限公司 | A kind of continuous nitration mixture acid feeding appts of polygamy side's automation |
| CN109626461A (en) * | 2018-11-13 | 2019-04-16 | 核工业北京化工冶金研究院 | A device and method for accelerated evaporation of waste liquid from acid in-situ leaching of uranium evaporation pond |
Non-Patent Citations (2)
| Title |
|---|
| 刘进军等: "《污染材料再循环再利用》", 31 March 2015, 中国原子能出版社 * |
| 王永莲主编: "《地浸采铀工艺技术》", 31 March 2007, 长沙：国防科技大学出版社 * |
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Application publication date: 20200421 |
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| RJ01 | Rejection of invention patent application after publication |