CN218989039U - Phosphogypsum flotation wastewater flocculation precipitation back divides matter reposition of redundant personnel retrieval and utilization device - Google Patents
Phosphogypsum flotation wastewater flocculation precipitation back divides matter reposition of redundant personnel retrieval and utilization device Download PDFInfo
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Abstract
The utility model discloses a device for separating and diverting and recycling phosphogypsum flotation wastewater after flocculation precipitation, which comprises a treatment device, a first backflow component and a second backflow component. The method solves the problems that in the phosphogypsum reverse flotation decolorization-forward flotation desilication purification process in the market in the prior art, reverse flotation decolorization tail water directly flows back to a reverse flotation decolorization and forward flotation desilication operation section without treatment to be used as supplementing water, fine organic matters, humus, carbon, chromogenic minerals and the like in the reverse flotation decolorization wastewater are accumulated in the flotation process, and flow into final concentrate, so that the whiteness of the final concentrate is reduced; if the desilication and pure flotation wastewater is reused for decoloration reverse flotation and desilication forward flotation, desilication collector in the forward flotation purification wastewater can interfere with decoloration reverse flotation to greatly reduce phosphogypsum recovery rate; finally, the whiteness and recovery rate of phosphogypsum concentrate products are reduced, and the technical problems of decolorization and desilication purification can not be achieved.
Description
Technical Field
The utility model relates to the technical field of mineral processing equipment, in particular to a device for separating and diverting and recycling phosphogypsum flotation wastewater after flocculation and precipitation.
Background
Phosphogypsum is solid waste generated in the wet-process phosphoric acid process, and the main component of phosphogypsum is calcium sulfate dihydrate; approximately 4.5 to 5.5t phosphogypsum are produced per 1t of phosphoric acid produced. Along with the continuous increase of the demand of high-concentration phosphorus compound fertilizer at home and abroad, the wet-process phosphoric acid industry rapidly develops; the phosphogypsum has huge output, is a class II general industrial solid waste, threatens the environmental safety, and directly affects the sustainable development of the high-concentration phosphorus compound fertilizer industry. Therefore, the comprehensive utilization of phosphogypsum has become a problem of sustainable development of industry; the content of calcium sulfate dihydrate in the phosphogypsum is lower, and the content of the calcium sulfate dihydrate in the phosphogypsum is 80-90%; phosphogypsum contains alkali metal salt, organic matter, silicate, aluminosilicate, P, F and other harmful impurities; phosphogypsum whiteness is 20-30; according to the first-level index requirement in GB/T23456-2018 phosphogypsum file, phosphogypsum raw paste cannot be directly utilized, so that the impurity in phosphogypsum can be removed by adopting a flotation separation method. A large amount of tail water is generated in the phosphogypsum reverse flotation decolorization and forward flotation purification process, and if the tail water is directly discharged into the environment without treatment, not only is the waste of water resources caused, but also various substances in the wastewater are discharged out of standard, and huge pollution is generated to the natural environment; in view of the precious water resources and environmental protection requirements, it is necessary that the tail water be returned to the flotation system for further use; meanwhile, the tail water contains a lot of impurities such as particles and the like, and directly flows back to a flotation system for use, so that various indexes of the product such as whiteness, yield, grade and the like of phosphogypsum products can be influenced; if the purified and floated wastewater is reused for the decoloration and reverse flotation, the recovery rate of phosphogypsum is greatly reduced due to the interference of the decoloration and reverse flotation, the phosphogypsum reverse flotation decoloration tail water directly flows back to a reverse flotation decoloration operation section to be used as supplementing water without being treated, and fine organic matters, humus, carbon, chromogenic minerals and the like in the reverse flotation decoloration wastewater are accumulated in the flotation process and flow into final concentrate, so that the whiteness of the final concentrate is reduced;
in chinese patent application CN104973712a, a "method and apparatus for treating phosphogypsum waste water" is disclosed, and the treatment process is as follows: adding lime milk into phosphogypsum slag field wastewater to remove fluorine, and separating the wastewater into calcium fluoride and clear water; dewatering the separated calcium fluoride into waste residue; the phosphorus in the clear water separated by lime milk generates calcium phosphate sediment; the calcium phosphate is sent to a reaction tank to produce phosphoric acid, so that project investment and operation cost are reduced; however, the device is not disclosed in relation to phosphogypsum flotation wastewater treatment and recycling of flotation wastewater.
Therefore, we propose a device for separating and recycling the phosphogypsum flotation wastewater after flocculation precipitation.
Disclosure of Invention
The utility model aims to overcome the defects of the technology, and provides a split-flow recycling device after phosphogypsum flotation wastewater flocculation precipitation, which solves the problems that in the phosphogypsum reverse flotation decolorization-forward flotation desilication purification technology in the market in the prior art, reverse flotation decolorization tail water directly flows back to a reverse flotation decolorization and forward flotation desilication operation section to be used as supplementing water without treatment, fine organic matters, humus, carbon, chromogenic minerals and the like in the reverse flotation decolorization wastewater accumulate in the flotation process and flow into final concentrate to cause the whiteness reduction of the final concentrate, and if the desilication and pure flotation wastewater is recycled for decolorization reverse flotation and desilication forward flotation, a desilication collector in the forward flotation purification wastewater can interfere decolorization reverse flotation to cause the recovery rate of phosphogypsum to be greatly reduced; finally, the whiteness and recovery rate of phosphogypsum concentrate products are reduced, and the technical problems of decolorization and desilication purification can not be achieved.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the device comprises a treatment device, a first reflux component and a second reflux component;
the treatment device comprises a mineral feeding area, a reverse flotation mechanism, a roughing mechanism, a selecting mechanism and a first filtering mechanism; the ore feeding area, the reverse flotation mechanism, the roughing mechanism, the carefully selecting mechanism and the first filtering mechanism are communicated with each other and are used for treating phosphogypsum;
the first reflux assembly comprises a first mixing mechanism, a first material guiding mechanism, a first thickening mechanism and a second filtering mechanism; the first mixing mechanism is communicated with the first thickening mechanism and is used for processing phosphogypsum reverse flotation decoloration wastewater and refluxing the processed phosphogypsum reverse flotation decoloration wastewater to the ore feeding area and the reverse flotation mechanism, and the second filtering mechanism is communicated with the first thickening mechanism through the first material guiding mechanism;
the second reflux assembly comprises a second mixing mechanism, a second thickening mechanism, a third filtering mechanism and a second material guiding mechanism; the second mixing mechanism is communicated with the second thickening mechanism and is used for processing phosphogypsum forward flotation desilication wastewater, and refluxing the processed phosphogypsum forward flotation desilication wastewater to the roughing mechanism and the selecting mechanism, and the third filtering mechanism is communicated with the second thickening mechanism through the second material guiding mechanism.
In a specific embodiment, the reverse flotation mechanism comprises a decolorizing reverse flotation tank and a first pump body; the decolorizing reverse flotation tank is communicated with the ore feeding area and is communicated with the rougher through the first pump body; the ore feeding area and the decolorizing reverse flotation tank are communicated with the first reflux component.
In a specific embodiment, the roughing mechanism comprises a roughing tank and a first foam bin; the roughing tank is communicated with the first foam bin, and the first foam bin is communicated with the carefully selecting mechanism; the roughing tank and the first foam bin are both in communication with the second reflow assembly.
In one embodiment, the fine selection mechanism comprises a fine selection primary groove, a second foam bin, a fine selection secondary groove, a third foam bin and a second pump body which are communicated with each other; the first carefully chosen groove, the second foam bin and the second carefully chosen groove are respectively communicated with the second reflux component; the second pump body is communicated with the first filtering mechanism.
In one embodiment of the present utility model, in one embodiment,
the first mixing mechanism comprises a first medicament barrel and a first stirring barrel;
the first material guiding mechanism comprises a third pump body and a fourth foam bin;
the first thickening mechanism comprises a fourth pump body, a first thickener and a fifth pump body;
the first medicament barrel is communicated with the first stirring barrel; the third pump body is communicated with the fourth foam bin, raw materials of the fourth foam bin are poured into the first stirring barrel, and the fourth foam bin is communicated with the decolorizing reverse flotation tank; the fourth pump body is communicated with the first stirring barrel, the raw materials are poured into the first thickener, and the first thickener returns liquid to the ore feeding area and the decolorizing reverse flotation tank; the fifth pump body is communicated with the first thickener and guides the waste into the second filtering mechanism.
In one embodiment of the present utility model, in one embodiment,
the second mixing mechanism comprises a second medicament barrel and a second stirring barrel;
the second thickening mechanism comprises a sixth pump body, a second thickener and a seventh pump body;
the second guide mechanism comprises an eighth pump body and a ninth pump body;
the second medicament barrel is communicated with the second stirring barrel, the sixth pump body is connected with the second stirring barrel and used for guiding phosphogypsum into the second thickener, the seventh pump body is communicated with the second thickener and used for guiding waste into the third filtering mechanism, and the eighth pump body is respectively communicated with the roughing tank, the carefully-selected primary tank and the carefully-selected secondary tank and used for guiding phosphogypsum into the second stirring barrel; the ninth pump body is communicated with the second thickener and is used for refluxing liquid into the first pump body, the first foam bin and the second foam bin.
In a specific embodiment, the pretreatment agent in the first cartridge is polyacrylamide; the first thickener is any one of a clarification tank, an inclined plate thickener and an inclined screen type solid-liquid separator.
In a specific embodiment, the pretreatment agent in the second cartridge is polyacrylamide; the second thickener is any one of a clarification tank, an inclined plate thickener and an inclined screen type solid-liquid separator.
In one embodiment, the mass ratio of the pretreatment agent to the object to be treated is 0.00005-0.0005:1, a step of; the polyacrylamide is anionic and has a molecular weight of 1×10 4 -2×10 7 。
In a specific embodiment, the stirring temperature in the first mixing mechanism and the second mixing mechanism is 10-75 ℃, and the stirring rotating speed is 5-1000 r/min.
Compared with the prior art, the utility model has the beneficial effects that:
1. compared with the prior art, the utility model can effectively treat phosphogypsum reverse flotation decolorization tail water, and lead the phosphogypsum reverse flotation decolorization tail water to flow back to a reverse flotation decolorization operation section to serve as additional water, so that fine organic matters, humus, carbon and the like in the additional water can not be accumulated in the flotation process, the whiteness of the final concentrate is ensured to meet the standard, the whiteness and recovery rate of phosphogypsum concentrate products can not be reduced, and the utility model treats phosphogypsum purification flotation tail water, and leads the phosphogypsum purification tail water to flow back to a purification flotation operation section to serve as additional water, thereby overcoming the defect that the recovery rate of phosphogypsum is greatly reduced due to the interference of purification flotation wastewater on decolorization reverse flotation operation, achieving the purposes of better decolorization and purification, and leading the finally discharged wastewater to not cause serious environmental problems, and greatly improving the working efficiency of mineral processing equipment.
Drawings
FIG. 1 is a schematic diagram of an exploded reflow process of the present utility model;
in the figure: 1. a processing device; 11. a feeding zone; 12. a reverse flotation mechanism; 121. a decolorizing reverse flotation tank; 122. a first pump body; 13. a roughing mechanism; 131. roughing the groove; 132. a first foam bin; 14. a selection mechanism; 141. selecting a primary groove; 142. a second foam bin; 143. selecting a secondary tank; 144. a third foam bin; 145. a second pump body; 15. a first filtering mechanism; 2. a first reflow assembly; 21. a first mixing mechanism; 211. a first medicament cartridge; 212. a first stirring barrel; 22. a first material guiding mechanism; 221. a third pump body; 222. a fourth foam bin; 23. a first thickening mechanism; 231. a fourth pump body; 232. a first thickener; 233. a fifth pump body; 24. a second filtering mechanism; 3. a second reflow assembly; 31. a second mixing mechanism; 311. a second medicament cartridge; 312. a second stirring barrel; 32. a second thickening mechanism; 321. a sixth pump body; 322. a second thickener; 323. a seventh pump body; 33. a third filtering mechanism; 34. a second material guiding mechanism; 341. an eighth pump body; 342. and a ninth pump body.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, the utility model provides a device for separating and recycling the phosphogypsum flotation wastewater after flocculation precipitation; comprising a processing device 1, a first reflow assembly 2 and a second reflow assembly 3.
The treatment device 1 comprises a feeding area 11, a reverse flotation mechanism 12, a rougher mechanism 13, a fine selection mechanism 14 and a first filtering mechanism 15; the ore feeding area 11, the reverse flotation mechanism 12, the rougher mechanism 13, the fine selection mechanism 14 and the first filter mechanism 15 are communicated with each other and are used for treating phosphogypsum.
The first reflux assembly 2 comprises a first mixing mechanism 21, a first material guiding mechanism 22, a first thickening mechanism 23 and a second filtering mechanism 24; the first mixing mechanism 21 is communicated with the first thickening mechanism 23 and is used for processing phosphogypsum reverse flotation decoloration wastewater and refluxing the processed phosphogypsum reverse flotation decoloration wastewater to the ore feeding area 11 and the reverse flotation mechanism 12, and the second filtering mechanism 24 is communicated with the first thickening mechanism 23 through the first material guiding mechanism 22.
The second reflux assembly 3 comprises a second mixing mechanism 31, a second thickening mechanism 32, a third filtering mechanism 33 and a second material guiding mechanism 34; the second mixing mechanism 31 is communicated with the second thickening mechanism 32, and is used for processing phosphogypsum direct flotation desilication wastewater, and refluxing the processed phosphogypsum direct flotation desilication wastewater to the roughing mechanism 13 and the selecting mechanism 14, and the third filtering mechanism 33 is communicated with the second thickening mechanism 32 through the second material guiding mechanism 34.
The method comprises the steps that a worker inputs phosphogypsum raw ore into an ore feeding area 11, after a period of processing, raw materials are poured into a reverse flotation mechanism 12, reverse flotation decoloration wastewater generated in the reverse flotation mechanism 12 is guided into a first material guiding mechanism 22, after being processed, the raw phosphogypsum raw ore is guided into a first mixing mechanism 21 to be mixed, mixed liquid is guided into a first thickening mechanism 23 to be processed, and the processed liquid flows back into the ore feeding area 11 and the reverse flotation mechanism 12; raw materials passing through the reverse flotation mechanism 12 enter the roughing mechanism 13, are subjected to roughing and then are introduced into the selecting mechanism 14, waste materials generated by the roughing mechanism 13 and the selecting mechanism 14 are introduced into the second mixing mechanism 31 for mixing processing, the mixed raw materials are poured into the second thickening mechanism 32, and treated liquid is returned to the roughing mechanism 13 and the selecting mechanism 14 by the second thickening mechanism 32 to be used as supplementing water; the final phosphogypsum product is finally obtained by the first filtering means 15, the first and second thickening means 23, 32 introduce the waste material into the second and third filtering means 24, 33 and a final flocculant cake is obtained.
To improve the treatment efficiency of the treatment device 1, referring to fig. 1, the reverse flotation mechanism 12 includes a decolorizing reverse flotation tank 121 and a first pump body 122; the decolorizing reverse flotation tank 121 is communicated with the ore feeding area 11, and the decolorizing reverse flotation tank 121 is communicated with the rougher 13 through a first pump body 122; both the ore feeding area 11 and the decolorizing reverse flotation tank 121 are communicated with the first reflux assembly 2, and the rougher mechanism 13 comprises a rougher tank 131 and a first foam bin 132; the roughing tank 131 is communicated with a first foam bin 132, and the first foam bin 132 is communicated with the fine selection mechanism 14; the roughing tank 131 and the first foam bin 132 are communicated with the second reflux assembly 3, and the selecting mechanism 14 comprises a selecting primary tank 141, a second foam bin 142, a selecting secondary tank 143, a third foam bin 144 and a second pump body 145 which are communicated with each other; the first concentrating tank 141, the second foam bin 142 and the second concentrating tank 143 are respectively communicated with the second reflux assembly 3; the second pump body 145 communicates with the first filter mechanism 15.
The decolorizing reverse flotation tank 121 pumps ore pulp into the roughing tank 131, meanwhile, the liquid in the first reflux component 2 is led into the roughing tank 131 to serve as additional water, the ore pulp stays in the roughing tank 131 for a certain time to fully react with the purified roughing agent and supply air into the roughing tank 131, at the moment, phosphogypsum concentrate rises along with foam, phosphogypsum concentrate foam is scraped into the first foam bin 132 through an external scraper, and then pumped into the first-stage concentrating tank 141, and the ore pulp in the purifying roughing tank 131 is phosphogypsum tailings and is sent into the first stirring barrel 212;
when the primary tank 141 is refined, the supplementing water is added into the primary tank 141 through the second reflux component 3, the ore pulp stays in the primary tank 141 for a period of time, fully reacts with refined chemical and charges air into the primary tank 141, at this time, phosphogypsum concentrate floats up along with foam, the phosphogypsum concentrate foam is scraped into the second foam bin 142 through the scraping plate, and then pumped into the secondary tank 143, and the phosphogypsum tailings of the ore pulp in the primary tank 141 are pumped into the second stirring barrel 312.
To improve the reflow efficiency of the first reflow assembly 2, referring to fig. 1, in a preferred embodiment, the first mixing mechanism 21 includes a first medicament cartridge 211 and a first stirring barrel 212; the first material guiding mechanism 22 comprises a third pump body 221 and a fourth foam bin 222; the first thickening mechanism 23 includes a fourth pump body 231, a first thickener 232, and a fifth pump body 233; the first medicament cylinder 211 is arranged in communication with the first stirring barrel 212; the third pump body 221 is communicated with the fourth foam bin 222, raw materials of the fourth foam bin 222 are led into the first stirring barrel 212, and the fourth foam bin 222 is communicated with the decolorizing reverse flotation tank 121; the fourth pump body 231 is communicated with the first stirring barrel 212 and guides the raw materials into the first thickener 232, and the first thickener 232 returns the liquid to the ore feeding area 11 and the decolorizing reverse flotation tank 121; the fifth pump body 233 is provided in communication with the first thickener 232 and guides the waste material into the second filter mechanism 24.
The method comprises the steps of putting polyacrylamide in a first medicament cylinder 211 as a water treatment medicament into a first stirring barrel 212, taking phosphogypsum reverse flotation decoloration wastewater as a first object to be treated, pumping the first object to be treated and the water treatment medicament into the first stirring barrel 212, stirring at a certain temperature at a certain rotating speed for a certain time, pumping into a first thickener 232, pumping and refluxing first treatment liquid obtained in the first thickener 232 into a mining area 11 and a decoloration reverse flotation tank 121 for recycling; the flocculated precipitate in the first thickener 232 is transferred to the second filter mechanism 24 through the fifth pump 233 to obtain a plurality of flocculated precipitate cakes.
To improve the reflow efficiency of the second reflow assembly 3, referring to fig. 1, in a preferred embodiment, the second mixing mechanism 31 includes a second medicament cartridge 311 and a second stirring barrel 312; the second thickener 32 includes a sixth pump body 321, a second thickener 322, and a seventh pump body 323; the second material guiding mechanism 34 comprises an eighth pump body 341 and a ninth pump body 342; the second medicament cylinder 311 is communicated with the second stirring barrel 312, the sixth pump body 321 is connected with the second stirring barrel 312 and is used for guiding phosphogypsum into the second thickener 322, the seventh pump body 323 is communicated with the second thickener 322 and is used for guiding waste into the third filtering mechanism 33, and the eighth pump body 341 is respectively communicated with the roughing tank 131, the fine selection primary tank 141 and the fine selection secondary tank 143 and is used for guiding phosphogypsum into the second stirring barrel 312; the ninth pump body 342 is in communication with the second thickener 322 and is configured to return liquid to the first pump body 122, the first foam cartridge 132, and the second foam cartridge 142.
The roughing tank 131 is characterized in that a flotation machine in the roughing tank 131 is desilication roughing, a first-stage selection tank 141 and a second-stage selection tank 143, phosphogypsum roughing desilication wastewater serving as a second object to be treated is pumped into a second stirring barrel 312, polyacrylamide is added into the second stirring barrel 312, the mixture is stirred at a certain temperature and stays for a certain period of time, and then is pumped into a second thickener 322, second treatment liquid obtained in the second thickener 322 is pumped and flows back into the first pump 122, the first foam bin 132 and the second foam bin 142 to be used as replenishing liquid for the roughing tank 131, the first-stage selection tank 141 and the second-stage selection tank 143, and flocculated sediment in the second thickener 322 is conveyed into the third filter mechanism 33 through a seventh pump 323 to obtain a plurality of flocculated sediment cakes.
In order to improve the stirring efficiency of the first stirring tank 212 and the second stirring tank 312, referring to fig. 1, in a preferred embodiment, the first thickener 232 and the second thickener 322 are any one of a clarifier, an inclined plate thickener and an inclined screen type solid-liquid separator, and the mass ratio of the pretreatment agent to the object to be treated is 0.00005-0.0005:1, a step of; polyacrylamide is anionic and has a molecular weight of 1×10 4 -2×10 7 The method comprises the steps of carrying out a first treatment on the surface of the The stirring temperature in the first stirring barrel 212 and the second stirring barrel 312 is 10-75 ℃, and the stirring rotation speed is 5-1000 r/min.
The first thickener 232 and the second thickener 322 are inclined plate thickeners, and the mass ratio of the pretreatment agent to the object to be treated is 0.0005:1, a step of; the stirring temperature in the first stirring tank 212 and the second stirring tank 312 was 75 ℃, and the stirring rotation speed was 1000r/min.
For a better understanding of the present utility model, the following describes in detail the working procedure of a device for separating and recycling the flocculated and precipitated phosphogypsum flotation wastewater according to the present utility model with reference to fig. 1:
firstly, polyacrylamide is taken as a water treatment agent and is put into a first stirring barrel 212 and a second stirring barrel 312;
the method comprises the steps that a worker guides phosphogypsum to be processed into a mineral feeding area 11 for processing, pumps the phosphogypsum into a decolorizing reverse flotation tank 121, stays for a period of time in the decolorizing reverse flotation tank 121 and reacts with decolorizing agents, and inflates the decolorizing reverse flotation tank 121, at the moment, colored minerals in phosphogypsum raw ore float upwards along with foam, the colored minerals are scraped into a fourth foam bin 222 through a scraping plate, then a third pump body 221 guides the phosphogypsum into a first stirring barrel 212, after stirring, the phosphogypsum raw ore is pumped into a first thickener 232 for processing by a fourth pump body 231, and the generated first treatment liquid, namely phosphogypsum reverse flotation decolorizing wastewater treatment liquid; pumped into the feed zone 11 and the decolorizing reverse flotation tank 121 as makeup water;
phosphogypsum passing through the decoloration reverse flotation tank 121 is guided into the roughing tank 131 by the first pump body 122, ore pulp stays in the roughing tank 131 for a period of time and fully reacts with the purification roughing medicament, and is inflated into the roughing tank 131, at the moment, phosphogypsum concentrate floats up along with foam, phosphogypsum concentrate foam is scraped to the first foam bin 132 by a scraping plate, the phosphogypsum is pumped into the first-stage cleaning tank 141 by the first foam bin 132 for processing, ore pulp stays in the first-stage cleaning tank 141 for a period of time and fully reacts with the purification roughing medicament, and is inflated into the first-stage cleaning tank 141, at the moment, phosphogypsum concentrate foam floats up along with foam, the phosphogypsum concentrate foam is scraped to the second foam bin 142 by the scraping plate, and is pumped into the second-stage cleaning tank 143; the roughing tank 131, the fine selection primary tank 141 and the fine selection secondary tank 143 guide the waste liquid into the second stirring barrel 312 through the eighth pump body 341, and guide the waste liquid into the second thickener 322 after the waste liquid is stirred by the second stirring barrel 312 to obtain a second treatment liquid, namely phosphogypsum forward flotation desilication waste water treatment liquid; the water is returned to the roughing tank 131, the fine-selecting primary tank 141 and the fine-selecting secondary tank 143 as a replenishing liquid through the ninth pump body 342 to be replenished; the raw materials passing through the third foam bin 144 are guided into the first filtering mechanism 15 by the second pump 145 to obtain a final phosphogypsum concentrate product;
and the yield of the existing refined phosphogypsum is 77.47 percent, caSO 4 ·2H 2 97.77% of O grade, 87.84% of recovery rate, 52.07% of whiteness at 45 ℃ and 70.27% of whiteness at 200 ℃;
after treatment, water floatation test is carried out, thus obtaining the refined phosphogypsum with the yield of 76.66 percent and CaSO 4 ·2H 2 Good indexes of 52.99 of whiteness at 45 ℃ and 71.42 of whiteness at 200 ℃ are 97.18% of O grade and 85.49% of recovery rate; it can be found that the yield, grade and recovery rate of the water concentrate after treatment are similar to those of clear water;
the first thickener 232 and the second thickener 322 filter the treated flocculated sediment through the second filter mechanism 24 and the third filter mechanism 33 to obtain a flocculated sediment cake; wherein the first filtering mechanism 15, the second filtering mechanism 24 and the third filtering mechanism 33 are all tubular filters commonly used in the market.
The above-described embodiments of the present utility model do not limit the scope of the present utility model. Any other corresponding changes and modifications made in accordance with the technical idea of the present utility model shall be included in the scope of the claims of the present utility model.
Claims (10)
1. The utility model provides a phosphogypsum flotation wastewater flocculation precipitation back divides matter reposition of redundant personnel retrieval and utilization device which characterized in that: comprises a processing device, a first reflow assembly and a second reflow assembly;
the treatment device comprises a mineral feeding area, a reverse flotation mechanism, a roughing mechanism, a selecting mechanism and a first filtering mechanism; the ore feeding area, the reverse flotation mechanism, the roughing mechanism, the carefully selecting mechanism and the first filtering mechanism are communicated with each other and are used for treating phosphogypsum;
the first reflux assembly comprises a first mixing mechanism, a first material guiding mechanism, a first thickening mechanism and a second filtering mechanism; the first mixing mechanism is communicated with the first thickening mechanism and is used for processing phosphogypsum reverse flotation decoloration wastewater and refluxing the processed phosphogypsum reverse flotation decoloration wastewater to the ore feeding area and the reverse flotation mechanism, and the second filtering mechanism is communicated with the first thickening mechanism through the first material guiding mechanism;
the second reflux assembly comprises a second mixing mechanism, a second thickening mechanism, a third filtering mechanism and a second material guiding mechanism; the second mixing mechanism is communicated with the second thickening mechanism and is used for processing phosphogypsum forward flotation desilication wastewater, and refluxing the processed phosphogypsum forward flotation desilication wastewater to the roughing mechanism and the selecting mechanism, and the third filtering mechanism is communicated with the second thickening mechanism through the second material guiding mechanism.
2. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 1, which is characterized in that: the reverse flotation mechanism comprises a decoloring reverse flotation tank and a first pump body; the decolorizing reverse flotation tank is communicated with the ore feeding area and is communicated with the rougher through the first pump body; the ore feeding area and the decolorizing reverse flotation tank are communicated with the first reflux component.
3. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 2, which is characterized in that: the roughing mechanism comprises a roughing groove and a first foam bin; the roughing tank is communicated with the first foam bin, and the first foam bin is communicated with the carefully selecting mechanism; the roughing tank and the first foam bin are both in communication with the second reflow assembly.
4. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 3, which is characterized in that: the fine selection mechanism comprises a fine selection primary groove, a second foam bin, a fine selection secondary groove, a third foam bin and a second pump body which are communicated with each other; the first carefully chosen groove, the second foam bin and the second carefully chosen groove are respectively communicated with the second reflux component; the second pump body is communicated with the first filtering mechanism.
5. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 2, which is characterized in that:
the first mixing mechanism comprises a first medicament barrel and a first stirring barrel;
the first material guiding mechanism comprises a third pump body and a fourth foam bin;
the first thickening mechanism comprises a fourth pump body, a first thickener and a fifth pump body;
the first medicament barrel is communicated with the first stirring barrel; the third pump body is communicated with the fourth foam bin, raw materials of the fourth foam bin are poured into the first stirring barrel, and the fourth foam bin is communicated with the decolorizing reverse flotation tank; the fourth pump body is communicated with the first stirring barrel, the raw materials are poured into the first thickener, and the first thickener returns liquid to the ore feeding area and the decolorizing reverse flotation tank; the fifth pump body is communicated with the first thickener and guides the waste into the second filtering mechanism.
6. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 4, which is characterized in that:
the second mixing mechanism comprises a second medicament barrel and a second stirring barrel;
the second thickening mechanism comprises a sixth pump body, a second thickener and a seventh pump body;
the second guide mechanism comprises an eighth pump body and a ninth pump body;
the second medicament barrel is communicated with the second stirring barrel, the sixth pump body is connected with the second stirring barrel and used for guiding phosphogypsum into the second thickener, the seventh pump body is communicated with the second thickener and used for guiding waste into the third filtering mechanism, and the eighth pump body is respectively communicated with the roughing tank, the carefully-selected primary tank and the carefully-selected secondary tank and used for guiding phosphogypsum into the second stirring barrel; the ninth pump body is communicated with the second thickener and is used for refluxing liquid into the first pump body, the first foam bin and the second foam bin.
7. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 5, which is characterized in that: the pretreatment medicament in the first medicament barrel is polyacrylamide; the first thickener is any one of a clarification tank, an inclined plate thickener and an inclined screen type solid-liquid separator.
8. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 6, which is characterized in that: the pretreatment medicament in the second medicament barrel is polyacrylamide; the second thickener is any one of a clarification tank, an inclined plate thickener and an inclined screen type solid-liquid separator.
9. The phosphogypsum flotation wastewater flocculation and precipitation back-quality-separation and flow-diversion recycling device according to claim 7, which is characterized in that: the mass ratio of the pretreatment agent to the object to be treated is 0.00005-0.0005, the polyacrylamide is anionic, and the molecular weight is 1×10 4 -2×10 7 。
10. The phosphogypsum flotation wastewater flocculation and precipitation back quality-separating and flow-dividing recycling device according to claim 1, which is characterized in that: the stirring temperature in the first mixing mechanism and the second mixing mechanism is 10-75 ℃, and the stirring rotating speed range is 5-1000 r/min.
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