CN113699373A - Movable type rare earth precipitation enrichment thickening and dewatering integrated equipment and method thereof - Google Patents
Movable type rare earth precipitation enrichment thickening and dewatering integrated equipment and method thereof Download PDFInfo
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- CN113699373A CN113699373A CN202111025225.9A CN202111025225A CN113699373A CN 113699373 A CN113699373 A CN 113699373A CN 202111025225 A CN202111025225 A CN 202111025225A CN 113699373 A CN113699373 A CN 113699373A
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 86
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 86
- 238000001556 precipitation Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008719 thickening Effects 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 85
- 239000002562 thickening agent Substances 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000018044 dehydration Effects 0.000 claims abstract description 31
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 31
- 239000012141 concentrate Substances 0.000 claims abstract description 30
- 239000002244 precipitate Substances 0.000 claims abstract description 19
- 238000009287 sand filtration Methods 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 18
- 239000006228 supernatant Substances 0.000 claims abstract description 16
- 239000008394 flocculating agent Substances 0.000 claims abstract description 12
- 238000005086 pumping Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000002386 leaching Methods 0.000 claims description 11
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 2
- 238000000926 separation method Methods 0.000 abstract description 15
- 238000005065 mining Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 159000000003 magnesium salts Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005352 clarification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses movable type rare earth precipitation concentrate thickening and dewatering integrated equipment and a method thereof, which are mainly used for liquid-solid separation of leachate precipitates obtained in the mining process of ionic rare earth ores, and specifically comprise the following steps: pumping the rare earth precipitation feed liquid into a thickener; step two: settling and layering the rare earth precipitation feed liquid in a thickener to obtain a dense liquid and a supernatant; step three: enabling the supernatant to flow into a sand filtration purifier to obtain a purified liquid; step four: adding a flocculating agent into the concentrated solution and allowing the concentrated solution to enter a spiral shell stacking dehydration mechanism; step five: and (4) dehydrating the concentrated solution by a screw-overlapping dehydration mechanism to obtain a rare earth concentrate and a turbid solution, returning the turbid solution to the thickener, and repeating the second step to the fifth step. The invention can realize the continuous and automatic separation of liquid and solid of the rare earth leachate precipitate on the rare earth mining site, the equipment is movable, and the floor area of the treatment system is greatly reduced, thus being beneficial to the land restoration after the mining is finished.
Description
Technical Field
The invention relates to the technical field of mineral resource development, in particular to movable type rare earth precipitation concentrate thickening and dewatering integrated equipment and a method thereof.
Background
The traditional exploitation of the ionic rare earth ore mainly adopts ammonium sulfate as an ore leaching agent, so that ammonia nitrogen and heavy metal in an environmental water body of an ore area seriously exceed standards, and harm is brought to production and life of people in the ore area.
In order to solve the environmental problem caused by the mining of the ionic rare earth ore, the state is vigorously popularizing a non-ammonia leaching new process, and a achievement magnesium salt ore leaching process developed for years is trial run. The key point of the magnesium salt process is the recycling of magnesium salt, so the magnesium salt leaching solution is precipitated by light-burned magnesia powder to recover enriched rare earth, rare earth enriched matter is obtained by filtration, and the filtrate returns to the leaching working section. At present, rare earth mine adopts plate-and-frame filtration, because the solid content of rare earth precipitate is 1%, thousands of cubic precipitates need to be treated every day, the solid-liquid separation system occupies a large area, the energy consumption is high, more manpower is needed, the area of a recovery site needing to be repaired after the mining is finished is large, and the cost is high. Therefore, it is necessary to develop a movable efficient continuous solid-liquid separation device, so that less labor is used for movable and continuous automatic control, the operation cost is reduced, and the recovery after the rare earth mine field is mined is facilitated due to less occupied area.
Disclosure of Invention
The invention aims to provide movable type rare earth precipitation concentrate thickening and dewatering integrated equipment and a method thereof, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides movable type rare earth precipitation concentrate thickening and dewatering integrated equipment which comprises a transport container and a dewatering device arranged in the transport container, wherein the dewatering device comprises a thickener, a spiral shell-overlapping dewatering mechanism and a sand filtration purifier, the thickener, the spiral shell-overlapping dewatering mechanism and the sand filtration purifier are fixedly connected with the transport container, the water outlet end of the thickener is communicated with the water inlet end of the sand filtration purifier, the dense liquid discharge end of the thickener is communicated with the material inlet end of the spiral shell-overlapping dewatering mechanism, and the turbid liquid discharge end of the spiral shell-overlapping dewatering mechanism is communicated with the liquid inlet end of the thickener.
Preferably, it includes the shell to fold spiral shell dewatering mechanism, it is connected with the pivot to rotate between the shell both sides wall, fixed mounting has the motor on the shell lateral wall, the output shaft of motor runs through the shell with pivot fixed connection, shell top fixed mounting has the feeder hopper, the dense liquid discharge end of concentrator is located the feeder hopper top, pivot outside fixed mounting has the spiral leaf, the shell is kept away from the one end opening setting of motor, the shell opening outside is provided with the backpressure board, it is equipped with and folds the spiral body to inlay on the shell, it is fixed with the collecting box to fold the spiral body outside, rigid coupling and intercommunication have the back flow on the collecting box, the back flow with concentrator feed liquor end intercommunication.
A method for thickening and dehydrating a rare earth precipitate concentrate comprises the following specific steps:
the method comprises the following steps: pumping the rare earth precipitation feed liquid into a thickener;
step two: settling and layering the rare earth precipitation feed liquid in a thickener to obtain a dense liquid and a supernatant;
step three: enabling the supernatant to flow into a sand filtration purifier to obtain a purified liquid;
step four: adding a flocculating agent into the concentrated solution and allowing the concentrated solution to enter a spiral shell stacking dehydration mechanism;
step five: and (4) dehydrating the concentrated solution by a screw-overlapping dehydration mechanism to obtain a rare earth concentrate and a turbid solution, returning the turbid solution to the thickener, and repeating the second step to the fifth step.
Preferably, in the first step, the rare earth precipitation feed liquid is pumped from the middle part of the thickener.
Preferably, the solid content of the concentrated solution obtained in the second step is 8-10%.
Preferably, the purified liquid obtained in the third step can be returned to the rare earth mine to prepare the rare earth leaching agent.
Preferably, the flocculant in the fourth step is polyacrylamide.
Preferably, the polyacrylamide is added in the fourth step in an amount of 0.01-0.5%.
The invention discloses the following technical effects:
1. the dehydration device is arranged in the transport container, so that the device can move, when the operation is needed, the operation can be carried out only by pulling the transport container to a specified place and unfolding the transport container, the movement is convenient, the disassembly and the assembly are not needed, the manpower and the material resources are saved, the working efficiency is improved, the rare earth precipitation concentrate thickening and dehydration can be completed only by three devices, namely a thickener, a spiral-stacked dehydration mechanism and a sand filtration purifier, the process is simple, and the occupied area is small.
2. The invention is suitable for the liquid-solid separation of the ionic rare earth mine leachate in-situ precipitation enrichment, and is also suitable for the liquid-solid separation of wastewater with the solid content of less than 1 percent, chemical industry and other mine industries. The thickener stratifies the rare earth precipitate by gravity settling, and the solid content is increased from 0.2-1% to 8-10% to obtain a concentrated solution; supernatant liquor passes through a sand filtration purifier to obtain clear liquor, and the clear liquor returns to a leaching working section; the concentrated solution is subjected to spiral shell stacking dehydration to obtain rare earth precipitate concentrate which can be further sent to a rare earth separation plant for recycling, the rare earth concentrate with different water contents can be obtained from the spiral shell stacking dehydration mechanism by controlling the speed of the concentrated solution entering the spiral shell stacking dehydration mechanism and the addition amount of the flocculating agent, and the turbid solution returns to the thickener for clarification and purification, so that the solid-liquid continuous and automatic separation of the rare earth precipitate is realized.
3. The invention can realize the continuous and automatic separation of liquid and solid of the rare earth leachate precipitate on the rare earth mining site, the equipment is movable, and the floor area of the treatment system is greatly reduced, thus being beneficial to the land restoration after the mining is finished.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a movable type rare earth precipitation concentrate thickening and dewatering integrated device;
FIG. 2 is a schematic structural diagram of a stack screw dewatering mechanism;
FIG. 3 is a process flow diagram of the present invention;
in the figure: 1. a shipping container; 2. a thickener; 3. a stacked spiral dewatering mechanism; 31. a housing; 311. a collection box; 312. a fixed shaft; 313. a filter ring; 32. a rotating shaft; 33. a motor; 34. a feed hopper; 341. a servo motor; 342. a stirring paddle; 343. a partition plate; 35. helical leaves; 36. a back pressure plate; 37. a return pipe; 38. and a hydraulic cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides movable type rare earth precipitation concentrate thickening and dewatering integrated equipment which comprises a transport container 1 and a dewatering device arranged in the transport container 1, wherein the dewatering device comprises a thickener 2, a spiral shell stacking dewatering mechanism 3 and a sand filtration purifier 4, the thickener 2, the spiral shell stacking dewatering mechanism 3 and the sand filtration purifier 4 are fixedly connected with the transport container 1, the water outlet end of the thickener 2 is communicated with the water inlet end of the sand filtration purifier 4, the dense liquid discharge end of the thickener 2 is communicated with the material inlet end of the spiral shell stacking dewatering mechanism 3, and the turbid liquid discharge end of the spiral shell stacking dewatering mechanism 3 is communicated with the liquid inlet end of the thickener 2.
The dehydration device is arranged in the transport container 1, so that the device can be moved, when the operation is needed, the operation can be carried out only by pulling the transport container 1 to a designated place and unfolding the transport container 1, the movement is convenient, the disassembly and the assembly are not needed, the manpower and the material resources are saved, the working efficiency is improved, the concentration and the dehydration of the rare earth precipitation concentrate can be completed only by three devices, namely the thickener 2, the screw-stacking dehydration mechanism 3 and the sand filtration purifier 4, the process is simple, and the occupied area is small.
When the device works, rare earth precipitation feed liquid is continuously pumped into the thickener 2, and in order to prevent disturbance of supernatant liquid, a liquid inlet pipe is inserted into the middle part of the thickener 2; turbid liquid obtained by dehydration from the spiral-stacked dehydration mechanism 3 enters the middle part of the thickener 2 through a liquid inlet pipe at the same time, and clear liquid with more than 90 percent of rare earth precipitation liquid directly enters the sand filtration purifier 4; after continuous clarification and layering in the thickener 2, less than 10 percent of concentrated solution enters the screw-overlapping dehydration mechanism 3 for dehydration.
Continuously putting the concentrated solution into a screw-overlapping dehydration mechanism 3 for dehydration under the control of flow rate, wherein the obtained solid material is a rare earth concentrate and the water content of the solid material is about 40%; the separated turbid liquid returns to the thickener 2 for cycle operation.
The supernatant of the thickener 2 continuously flows into the sand filter purifier 4 from the water inlet end, and the purified liquid flows out from the outlet end, and the purified liquid returns to the mine to prepare the rare earth leaching agent.
Further optimization scheme, it includes shell 31 to fold spiral shell dewatering mechanism 3, it is connected with pivot 32 to rotate between the shell 31 both sides wall, fixed mounting has motor 33 on the shell 31 lateral wall, the output shaft of motor 33 runs through shell 31 and pivot 32 fixed connection, shell 31 top fixed mounting has feeder hopper 34, the dense liquid discharge end of concentrator 2 is located feeder hopper 34 top, pivot 32 outside fixed mounting has spiral leaf 35, the one end opening setting of motor 33 is kept away from to shell 31, the shell 31 opening outside is provided with back of the body clamp plate 36, it is equipped with the spiral shell body to inlay on the shell 31, it is fixed with collecting box 311 to fold the spiral shell body outside, rigid coupling has back flow 37 on the collecting box 311 and leads to, back flow 37 and 2 inlet ends of concentrator, the last fixed mounting of back flow 37 has the mortar pump. The dense liquid enters the shell 31 from the feed hopper 34, the motor 33 drives the rotating shaft 32 to rotate, the rotating shaft 32 drives the spiral blade 35 to rotate, the dense liquid enters the blade groove of the spiral blade 35 and moves along with the rotation of the spiral blade 35 to the opening direction of the shell 31, the dense liquid finally contacts the back pressure plate 36, the back pressure plate 36 generates an extrusion effect on the dense liquid in the spiral blade 35, the spiral blade 35 cooperates with the spiral lamination body and the back pressure plate 36 to extrude the dense liquid in the dense liquid, the dense liquid enters the collecting box 311 through the spiral lamination body and then returns to the thickener 2 through the return pipe 37 to perform secondary precipitation, and the rare earth precipitate concentrate with most of water removed is discharged from the discharge port between the opening of the shell 31 and the back pressure plate 36.
Further optimizing scheme, the leaf thickness of spiral leaf 35 increases from the one end that is close to motor 33 to the other end gradually, makes the blade groove of spiral leaf 35 narrow down gradually to cause the extrusion to the dense liquid in the blade groove, extrude away wherein turbid liquid, the one end that motor 33 was kept away from to pivot 32 is the toper structure, makes the blade groove of toper structure part become shallow gradually, further compresses the volume of dense liquid in the blade groove, extrudees wherein turbid liquid, reinforcing dehydration effect, obtains the lower rare earth deposit enrichment of water content.
In a further optimized scheme, the laminated spiral body comprises a plurality of fixed shafts 312, the fixed shafts 312 are fixed between two side walls of the collecting box 311, the number of the fixed shafts 312 is preferably 4, a plurality of fixed rings 313 penetrate through the 4 fixed shafts 312, a movable ring is clamped between the adjacent fixed rings 313, and the spiral blade 35 is located inside the fixed rings 313. During the rotation of the spiral blade 35, the dense liquid in the blade groove is squeezed to squeeze out the turbid liquid, and due to the interference connection between the fixed ring 313 and the movable ring, the solid matter in the dense liquid cannot flow out from the gap between the fixed ring 313 and the movable ring, and the turbid liquid flows out through the gap between the adjacent fixed ring 313 and the movable ring and enters the collection box 311.
According to the further optimization scheme, a support is fixedly connected to the shell 31, a hydraulic cylinder 38 is fixedly mounted on the support, the output end of the hydraulic cylinder 38 is fixedly connected with the back pressure plate 36, the hydraulic cylinder 38 can control the distance between the back pressure plate 36 and the opening of the shell 31 through a piston to control the discharge speed of the rare earth precipitation enrichment of the spiral dewatering mechanism 3, the distance between the back pressure plate 36 and the opening of the shell 31 is short, the discharge speed of the rare earth precipitation enrichment is low, meanwhile, the water content of the rare earth precipitation enrichment is low, the distance between the back pressure plate 36 and the opening of the shell 31 is long, the discharge speed of the rare earth precipitation enrichment is high, meanwhile, the water content of the rare earth precipitation enrichment is high, the distance between the back pressure plate 36 and the opening of the shell 31 can be controlled according to work needs, and the rare earth precipitation enrichment with proper concentration is obtained.
According to the further optimization scheme, the servo motor 341 is fixed on the side wall of the feed hopper 34, the output shaft of the servo motor 341 penetrates through the side wall of the feed hopper 34 and is fixedly connected with the stirring paddle 342, a sealing bearing is installed between the output shaft of the servo motor 341 and the side wall of the feed hopper 34 to prevent dense liquid from leaking, the stirring paddle 342 is located inside the feed hopper 34, the separation plate 343 is fixed in the feed hopper 34, a feed inlet is formed in the bottom of the separation plate 343, when the dense liquid enters the feed hopper 34, a flocculating agent is added, the servo motor 341 is started to drive the stirring paddle 342 to rotate, the dense liquid is stirred to enable the dense liquid and the flocculating agent to be mixed together, and then the dense liquid and the flocculating agent enter the shell 31 from the feed inlet to be dehydrated.
A method for thickening and dehydrating a rare earth precipitate concentrate comprises the following specific steps:
the method comprises the following steps: the rare earth precipitation feed liquid is continuously pumped into the thickener 2, and in order to prevent the disturbance of supernatant liquor, a feed liquid pipe is inserted into the middle part of the thickener 2;
step two: the rare earth precipitation feed liquid is settled and layered in the thickener 2, more than 90 percent of the rare earth precipitation feed liquid becomes supernatant liquor, less than 10 percent of the rare earth precipitation feed liquid becomes dense liquid, and the solid content of the dense liquid is 8-10 percent;
step three: directly feeding the supernatant into a sand filtration purifier, feeding the supernatant into a sand filtration purifier 4 to obtain a purified liquid, and returning the purified liquid to the rare earth mine to prepare a rare earth leaching agent;
step four: adding 0.01-0.5% of flocculating agent polyacrylamide into the concentrated solution, and allowing the concentrated solution to enter a spiral-folding dewatering mechanism 3;
step five: and (4) dehydrating the concentrated solution by a spiral shell-overlapping dehydration mechanism 3 to obtain a rare earth concentrate and turbid solution, returning the turbid solution to the thickener 2, and repeating the second step to the fifth step.
The invention is suitable for the liquid-solid separation of the ionic rare earth mine leachate in-situ precipitation enrichment, and is also suitable for the liquid-solid separation of wastewater with the solid content of less than 1 percent, chemical industry and other mine industries. The thickener stratifies the rare earth precipitate by gravity settling, and the solid content is increased from 0.2-1% to 8-10% to obtain a concentrated solution; supernatant liquor passes through a sand filtration purifier to obtain clear liquor, and the clear liquor returns to a leaching working section; the concentrated solution is subjected to spiral shell stacking dehydration to obtain rare earth precipitate concentrate which can be further sent to a rare earth separation plant for recycling, the rare earth concentrate with different water contents can be obtained from the spiral shell stacking dehydration mechanism by controlling the speed of the concentrated solution entering the spiral shell stacking dehydration mechanism and the addition amount of the flocculating agent, and the turbid solution returns to the thickener for clarification and purification, so that the solid-liquid continuous and automatic separation of the rare earth precipitate is realized.
Example 1
Taking 50 cubic meters of rare earth precipitation feed liquid with the solid content of 0.3% from a certain rare earth mine in Ganzhou, thickening the rare earth precipitation feed liquid by a thickener 2 to obtain 8% dense liquid, and filtering supernatant liquid by sand to obtain purified liquid; adding 0.8kg/h of flocculating agent polyacrylamide into the concentrated solution at the speed of 500 liters/h, stirring, and continuously feeding the concentrated solution into a screw-overlapping dehydration mechanism 3 for dehydration to obtain a rare earth concentrate with the water content of 38%; the turbid liquid returns to the thickener 2.
Example 2
Taking 50 cubic meters of rare earth precipitation feed liquid with the solid content of 0.3% from a certain rare earth mine in Ganzhou, thickening the rare earth precipitation feed liquid by a thickener 2 to obtain 10% dense liquid, and filtering supernatant liquid by sand to obtain purified liquid; adding a flocculating agent polyacrylamide into the concentrated solution at the speed of 500 liters/hour for stirring at the speed of 1 kg/hour, and continuously feeding the concentrated solution into a spiral shell stacking dehydration mechanism 3 for dehydration to obtain a rare earth concentrate with the water content of 42 percent; the turbid liquid returns to the thickener 2.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. The utility model provides a concentrated integrative equipment of dehydration of movable tombarthite deposit enrichment which characterized in that: including transportation container (1) and install in dewatering device in transportation container (1), dewatering device include dense ware (2), fold spiral shell dewatering mechanism (3) and sand filtration clarifier (4), dense ware (2), fold spiral shell dewatering mechanism (3) and sand filtration clarifier (4) all with transportation container (1) fixed connection, the play water end of dense ware (2) with the end intercommunication of intaking of sand filtration clarifier (4), the dense liquid discharge end of dense ware (2) with the feed end intercommunication of folding spiral shell dewatering mechanism (3), the turbid liquid discharge end of folding spiral shell dewatering mechanism (3) with the feed liquor end intercommunication of dense ware (2).
2. The movable rare earth precipitation concentrate thickening and dewatering integrated equipment as claimed in claim 1, characterized in that: fold spiral shell dewatering mechanism (3) and include shell (31), it is connected with pivot (32) to rotate between shell (31) both sides wall, fixed mounting has motor (33) on shell (31) lateral wall, the output shaft of motor (33) runs through shell (31) with pivot (32) fixed connection, shell (31) top fixed mounting has feeder hopper (34), the dense liquid discharge end of concentrator (2) is located feeder hopper (34) top, pivot (32) outside fixed mounting has spiral leaf (35), shell (31) are kept away from the one end opening setting of motor (33), shell (31) opening outside is provided with back pressure board (36), it is equipped with and folds the spiral body to inlay on shell (31), it is fixed with collecting box (311) to fold the spiral body outside, rigid coupling and intercommunication have back flow (37) on collecting box (311), the return pipe (37) is communicated with the liquid inlet end of the thickener (2).
3. A method for thickening and dehydrating a rare earth precipitation concentrate is applied to the movable type rare earth precipitation concentrate thickening and dehydrating integrated equipment in any one of claims 1-2, and is characterized by comprising the following specific steps of:
the method comprises the following steps: pumping the rare earth precipitation feed liquid into a thickener (2);
step two: the rare earth precipitation feed liquid is settled and layered in a thickener (2) to obtain a dense liquid and a supernatant;
step three: the supernatant fluid flows into a sand filtration purifier (4) to obtain a purified fluid;
step four: adding a flocculating agent into the concentrated solution and entering a spiral shell stacking dehydration mechanism (3);
step five: and (4) dehydrating the concentrated solution by a screw-overlapping dehydration mechanism (3) to obtain a rare earth concentrate and turbid solution, returning the turbid solution to the thickener (2), and repeating the second step to the fifth step.
4. The method of thickening and dewatering a rare earth precipitate concentrate according to claim 3, characterized by: in the first step, the rare earth precipitation feed liquid is pumped from the middle part of the thickener (2).
5. The method of thickening and dewatering a rare earth precipitate concentrate according to claim 3, characterized by: the solid content of the concentrated liquid obtained in the step two is 8-10%.
6. The method of thickening and dewatering a rare earth precipitate concentrate according to claim 3, characterized by: the purified liquid obtained in the third step can be returned to the rare earth mine to prepare the rare earth leaching agent.
7. The method of thickening and dewatering a rare earth precipitate concentrate according to claim 3, characterized by: and step four, the flocculating agent is polyacrylamide.
8. The method of thickening and dewatering a rare earth precipitate concentrate according to claim 3, characterized by: the addition amount of the polyacrylamide in the step four is 0.01-0.5%.
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| JP2015040728A (en) * | 2013-08-21 | 2015-03-02 | 株式会社リソースクリエイト | Mobile type compact decontamination device |
| CN209442849U (en) * | 2018-12-03 | 2019-09-27 | 智造起源科技有限公司 | A kind of Vehicular mud drying device |
| CN112760478A (en) * | 2020-12-10 | 2021-05-07 | 核工业北京化工冶金研究院 | High-clay polymetallic ore pulp thickening method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015040728A (en) * | 2013-08-21 | 2015-03-02 | 株式会社リソースクリエイト | Mobile type compact decontamination device |
| CN209442849U (en) * | 2018-12-03 | 2019-09-27 | 智造起源科技有限公司 | A kind of Vehicular mud drying device |
| CN112760478A (en) * | 2020-12-10 | 2021-05-07 | 核工业北京化工冶金研究院 | High-clay polymetallic ore pulp thickening method |
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