CN108097447B - Medium phosphorus ore sorting method and sorting system - Google Patents
Medium phosphorus ore sorting method and sorting system Download PDFInfo
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- CN108097447B CN108097447B CN201711135440.8A CN201711135440A CN108097447B CN 108097447 B CN108097447 B CN 108097447B CN 201711135440 A CN201711135440 A CN 201711135440A CN 108097447 B CN108097447 B CN 108097447B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
The invention provides a method and a system for separating medium phosphorus ore, wherein the method comprises the steps of crushing raw ore, mixing and grinding the crushed raw ore with water to obtain ore pulp, screening the ore pulp into medium-particle-size ore pulp and primary coarse ore pulp, carrying out graded sedimentation on the medium-particle-size ore pulp to obtain fine ore pulp and secondary coarse ore pulp, mixing the secondary coarse ore pulp and the primary coarse ore pulp for ore blending, and conveying the obtained finished ore pulp to each production workshop; the sorting system comprises a crushing processing unit, a batching unit, an overflow ball mill A, a hydrocyclone B, a mixed ore blending unit, an output unit and the like; by adopting the technical scheme of the invention, the acid-insoluble substances and the silica gel are easily enriched in the fine-grade mineral powder by selecting proper equipment to selectively grind according to the difference of the mineral hardness in the raw ore, and then the coarse ore pulp and the fine ore pulp which are screened out can be reasonably applied by selective grinding in a grading way, so that the utilization rate of the medium-phosphorus ore is improved, and the particle size difference of the mineral powder is controlled.
Description
Technical Field
The invention belongs to the technical field of mining production, and particularly relates to a medium phosphorus ore sorting method and a sorting system.
Background
With the continuous development of mining industry, the mining depth of a mine is continuously deepened into the underground, but with the continuous increase of the mining depth, the mineral products of collected raw ores have a tendency of decreasing, taking phosphor fertilizer limited company in Guizhou as an example, the mining area currently being mined is positioned at the upper part of a steep hill tuo group on a seismic system and is widely exposed on two wings of a short ocean water axis back slope moving to the near north and south directions. The mining area comprises 6 mining sections, the scale of the ore deposit is huge, the thickness and the taste of the ore deposit are stable, however, with the mining of nearly 60 years, the lower phosphorite gradually enters the middle phosphorite, the mining amount of the phosphorite in other mining areas is urgently needed to be utilized to supplement the usage amount all the year round, and after analysis, the grade of the phosphorite P2O5 in other ore sections is only 28 percent, the content of impurities such as associated SiO2, acid insoluble substances, R2O3 and the like is obviously higher, if the existing wet-process phosphoric acid production process is adopted, the ore powder has serious two-stage differentiation of the particle size of the ore powder in the grinding process of the medium phosphorus ore, the content difference of coarse and fine components is large, the P2O5 in the coarse ore powder has high taste and low impurity content, the P2O5 in the fine ore powder has low taste and high impurity content, acid insoluble substances and silica gel are easy to be enriched in the fine ore powder, and the analysis on the content of the coarse and fine ore powder components is not satisfactory, meanwhile, the unqualified pulp underflow circulation volume in the hydrocyclone in the ore grinding system is large, and the phenomenon of 'dead circulation' of coarse ore particles in different degrees occurs. In addition, the problems of difficult filtration of phosphogypsum, over-high residual phosphorus, excessive impurities of phosphoric acid products and the like occur when the medium phosphorus ore is adopted for wet-process phosphoric acid extraction production. If the medium phosphorus ore is mixed with normal ore for production, the limit mixable amount of the medium phosphorus ore is only 8%.
Disclosure of Invention
In order to solve the technical problems, the invention provides a medium phosphorus ore sorting method and a medium phosphorus ore sorting system.
The invention provides a method for sorting medium phosphorus ores, which comprises the following steps:
the method comprises the following steps: crushing raw ores in a mining area to obtain medium phosphorus ores;
step two: collecting water in nature through a conveying pipeline, and taking the collected water as process water;
step three: mixing the medium phosphorus ore in the step one and the process water in the step two, and then sending the mixture into an overflow ball mill for grinding to obtain ore pulp;
step four: screening the ore pulp obtained in the step three, and screening the ore pulp into ore pulp with medium particle size and primary coarse ore pulp;
step five: returning the primary coarse ore pulp obtained in the fourth step to the overflow ball mill for grinding;
step six: feeding the medium-particle size ore pulp obtained in the step four into a hydrocyclone to enable ore particles in the medium-particle size ore pulp to be subjected to graded sedimentation, obtaining fine ore pulp from an overflow outlet of the hydrocyclone, and obtaining secondary coarse ore pulp from a underflow outlet of the hydrocyclone;
step seven: sending one part of the secondary coarse ore pulp in the step six into the overflow type ball mill in the step three for grinding, adding a proper amount of process water in the step two after mixing the other part of the secondary coarse ore pulp with the primary coarse ore pulp in the step four for blending, and then sequentially sending into the overflow type ball mill and the hydrocyclone for grinding and fractional sedimentation respectively to obtain finished product ore pulp;
step eight: and conveying the finished product ore pulp obtained in the step seven to each production workshop.
The particle size of the medium phosphorus ore in the step one is less than 20 mm.
The fineness of the medium-particle size ore pulp in the fourth step is less than 100 meshes.
And seventhly, the secondary coarse ore pulp which is sent into the overflow ball mill for grinding accounts for 30% of the total amount of the secondary coarse ore pulp.
The invention provides a middlings sorting system, which comprises a crushing processing unit, a batching unit, an overflow ball mill A, a hydrocyclone B, a mixed ore blending unit and an output unit, wherein overflow outlets are arranged at the tops of the hydrocyclone A and the hydrocyclone B, underflow outlets are arranged at the bottoms of the hydrocyclone A and the hydrocyclone B, the crushing processing unit is sequentially connected with the batching unit, the overflow ball mill A, a rotary screen A, a ground trough A, a slurry pump A and the input end of the hydrocyclone A in series, the underflow outlet of the hydrocyclone A is also sequentially connected with the input ends of a coarse slurry trough, a slurry pump B and a hydrocyclone B in series, the underflow outlets of the hydrocyclone A and the hydrocyclone B are connected with the input end of the overflow ball mill A in parallel, and the overflow outlets of the hydrocyclone A and the hydrocyclone B are connected with each other in parallel and then serve as a first output end of the middlings sorting system, the output end of the slurry pump B is sequentially connected with the mixed ore blending unit and the output unit in series, and the output end of the output unit is used as a second output end of the medium phosphorus ore sorting system.
The mixed ore blending unit comprises an overflow ball mill B, a rotary screen B, a ground groove B, a slurry pump C, a hydrocyclone C, a finished product slurry groove A and a slurry pump D which are sequentially connected in series, wherein the underflow outlet of the hydrocyclone C is also connected with the input end of the overflow ball mill B, the overflow ball mill B is used as the input end of the mixed ore blending unit, and the slurry pump D is used as the output end of the mixed ore blending unit.
And the input end of the overflow ball mill B is also connected with a batching unit.
The batching unit comprises a medium-phosphorus ore bin, a heavy plate feeder and a belt conveyor B which are sequentially connected in series.
The crushing processing unit comprises a raw ore storage hopper, a heavy plate feeder, at least three cone crushers and a plurality of belt conveyors B, the output end of the raw ore storage hopper is connected with the input end of the heavy plate feeder, any two adjacent cone crushers are connected in series through the belt conveyors B, the input end of the first cone crusher is connected with the output end of the heavy plate feeder, and the output end of the last cone crusher serves as the output end of the crushing processing unit.
The output unit comprises a finished product slurry tank B, a feeding pump and a plurality of diaphragm pumps, the notch of the finished product slurry tank A serves as the input end of the output unit, the output ends of the diaphragm pumps serve as the output end of the output unit after being connected in parallel, the output end face of the finished product slurry tank A is connected with the input end of the feeding pump, and the input ends of the diaphragm pumps are connected with the output end of the feeding pump after being connected in parallel.
The invention has the beneficial effects that:
by adopting the technical scheme provided by the invention, as the main component of the medium-phosphorus ore is apatite, the hardness of the medium-phosphorus ore is 5, the siliceous gangue mineral is mainly clay mineral, the Mohs hardness of the siliceous gangue mineral is generally 2-2.5, in the process of ore crushing, proper crushing equipment is selected to carry out selective grinding according to the difference of the hardness of each mineral, the siliceous gangue mineral with smaller hardness is easy to be enriched in fine grade, thus acid insoluble substances and silica gel are easy to be enriched in fine grade mineral powder, coarse and fine medium-phosphorus ore pulp is classified and screened according to the condition of particle size mesh, the screened coarse mineral powder is ground again to obtain the ore pulp with the particle size meeting the production requirement, and the ore pulp can be used for producing the wet-process phosphoric acid, while the screened fine mineral powder can be used for producing the low-concentration phosphatic fertilizer, common calcium and other phosphatic fertilizer products by the system processes such as aging reaction with nitric acid, phosphoric acid, sulfuric acid and the like, meanwhile, the problem of low mixing proportion of the medium phosphorus ore is solved by mixing and blending the primary coarse ore pulp and the secondary coarse ore pulp, so that the utilization rate of the medium phosphorus ore is improved, and the problems that in the prior art, the ore particle diameter is seriously differentiated in two stages in an ore grinding process, the underflow circulation amount of unqualified ore pulp in a hydrocyclone is large, and the coarse ore particles in different degrees are in 'dead circulation' are solved.
Drawings
FIG. 1 is a flow chart of a sorting method of the present invention;
FIG. 2 is a schematic diagram of the configuration of the sorting system of the present invention;
FIG. 3 is a schematic diagram of the configuration of the hybrid ore blending unit of the sorting system of the present invention;
FIG. 4 is a schematic diagram of the configuration of the dispensing unit of the sorting system of the present invention;
FIG. 5 is a schematic diagram of the configuration of the crushing treatment unit of the sorting system of the present invention;
FIG. 6 is a schematic diagram of the configuration of the output unit of the sorting system of the present invention;
fig. 7 is a schematic structural view of a water supply unit of the sorting system of the present invention.
In the figure: 1-a crushing treatment unit, 2-a batching unit, 3-an overflow ball mill A, 4-a hydrocyclone A, 5-a hydrocyclone B, 6-a mixed ore blending unit, 7-an output unit, 8-a rotary screen A, 9-a ground tank A, 10-a slurry pump A, 11-a coarse slurry tank, 12-a slurry pump B, 13-an overflow ball mill B, 14-a rotary screen B, 15-a ground tank B, 16-a slurry pump C, 17-a hydrocyclone C, 18-a finished slurry tank A, 19-a slurry pump D, 20-a medium phosphorus ore bin, 21-a disc feeder, 22-a belt conveyor A, 23-a raw ore storage hopper, 24-a heavy duty plate feeder, 25-a cone crusher, 26-a belt conveyor B, 27-finished product slurry tank B, 28-feeding pump, 29-diaphragm pump, 30-water supply unit, 31-cooling tower, 32-delivery pump and 33-water storage tank.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings, but the claimed protection scope is not limited thereto;
the invention provides a method for sorting medium phosphorus ores;
as shown in fig. 1, the medium phosphorite sorting system comprises the following steps:
the method comprises the following steps: crushing raw ores in a mining area to obtain medium phosphorus ores;
step two: collecting water in nature through a conveying pipeline, and taking the collected water as process water;
step three: mixing the phosphorus ore in the step one and the process water in the step two, and then sending the mixture into an overflow ball mill for grinding to obtain ore pulp;
step four: screening the ore pulp obtained in the step three, and screening the ore pulp into ore pulp with medium particle size and primary coarse ore pulp;
step five: returning the coarse ore pulp obtained in the fourth step to the overflow ball mill for grinding;
step six: feeding the ore pulp with the medium particle size in the step four into a hydrocyclone to ensure that ore particles in the ore pulp with the medium particle size are subjected to graded sedimentation, obtaining fine ore pulp from an overflow outlet of the hydrocyclone, and obtaining secondary coarse ore pulp from an underflow outlet of the hydrocyclone;
step seven: sending one part of the secondary coarse ore pulp in the step six into the overflow type ball mill in the step three for grinding, adding a proper amount of process water in the step two after mixing the other part of the secondary coarse ore pulp with the primary coarse ore pulp in the step four for blending, and then sequentially sending into the overflow type ball mill and the hydrocyclone for grinding and fractional sedimentation respectively to obtain finished product ore pulp;
step eight: and conveying the ore pulp of the finished product obtained in the step seven to each production workshop.
By adopting the technical scheme provided by the invention, as the main component of the medium-phosphorus ore is apatite, the hardness of the medium-phosphorus ore is 5, the siliceous gangue mineral is mainly clay mineral, the Mohs hardness of the siliceous gangue mineral is generally 2-2.5, in the process of ore crushing, proper crushing equipment is selected to carry out selective grinding according to the difference of the hardness of each mineral, the siliceous gangue mineral with smaller hardness is easy to be enriched in fine grade, thus acid insoluble substances and silica gel are easy to be enriched in fine grade mineral powder, coarse and fine medium-phosphorus ore pulp is classified and screened according to the condition of particle size mesh, the screened coarse mineral powder is ground again to obtain the ore pulp with the particle size meeting the production requirement, and the ore pulp can be used for producing the wet-process phosphoric acid, while the screened fine mineral powder can be used for producing the low-concentration phosphatic fertilizer, common calcium and other phosphatic fertilizer products by the system processes such as aging reaction with nitric acid, phosphoric acid, sulfuric acid and the like, meanwhile, the problem of low mixing proportion of the medium phosphorus ore is solved by mixing and blending the primary coarse ore pulp and the secondary coarse ore pulp, so that the utilization rate of the medium phosphorus ore is improved, and the problems that in the prior art, the ore particle diameter is seriously differentiated in two stages in an ore grinding process, the underflow circulation amount of unqualified ore pulp in a hydrocyclone is large, and the coarse ore particles in different degrees are in 'dead circulation' are solved.
Further, the particle size of the phosphorus ore in the first step is less than 20 mm.
Further, the fineness of the ore pulp with the medium particle size in the fourth step is less than 100 meshes.
And further, in the seventh step, a part of the secondary coarse ore pulp sent into the overflow ball mill for grinding accounts for 30% of the total amount of the secondary coarse ore pulp.
As shown in fig. 2 to 7, the intermediate phosphorus ore sorting system comprises a crushing treatment unit 1, a batching unit 2, a overflow ball mill A3, a hydrocyclone A4, a hydrocyclone B5, a mixing and ore-blending unit 6 and an output unit 7, overflow outlets are arranged at the tops of a hydrocyclone A4 and a hydrocyclone B5, underflow outlets are arranged at the bottoms of a hydrocyclone A4 and a hydrocyclone B5, the crushing treatment unit 1 is sequentially connected with the batching unit 2, the overflow ball mill A3, a trommel A8, a ground trough a9, a slurry pump a10 and an input end of a hydrocyclone A4 in series, an underflow outlet of the hydrocyclone A4 is further sequentially connected with an input end of a coarse slurry trough 11, a slurry pump B12 and a hydrocyclone B5 in series, an underflow outlet of the hydrocyclone A4 and a hydrocyclone B5 is connected with an input end of the overflow ball mill A3 in parallel, and an overflow outlet of the hydrocyclone A4 and the hydrocyclone B5 are connected in parallel to serve as a first output end of the intermediate phosphorus ore sorting system, the output end of the slurry pump B12 is sequentially connected with the mixed ore blending unit 6 and the output unit 7 in series, and the output end of the output unit 7 is used as the second output end of the medium phosphorus ore sorting system.
The mixed ore blending unit 6 comprises an overflow ball mill B13, a rotary screen B14, a ground trough B15, a slurry pump C16, a hydrocyclone C17, a finished product slurry trough A18 and a slurry pump D19 which are sequentially connected in series, wherein the underflow outlet of the hydrocyclone C17 is also connected with the input end of the overflow ball mill B13, the overflow ball mill B13 is used as the input end of the mixed ore blending unit 6, and the slurry pump D19 is used as the output end of the mixed ore blending unit 6.
The input end of overflow ball mill B13 is also connected with batching unit 2.
The batching unit 2 comprises a medium-phosphorus ore bunker 20, a heavy duty slat feeder (24) and a belt conveyor B26 which are connected in series in turn.
The crushing processing unit 1 comprises a raw ore storage hopper 23, a heavy plate feeder (24), at least three cone crushers 25 and a plurality of belt conveyors B26, the output end of the raw ore storage hopper 23 is connected with the input end of the heavy plate feeder (24), any two adjacent cone crushers 25 are connected in series through the belt conveyors B26, the input end of a first cone crusher 25 is connected with the output end of the heavy plate feeder (24), and the output end of the last cone crusher 25 serves as the output end of the crushing processing unit 1.
Further, the output unit 7 comprises a finished product slurry tank B27, a feeding pump 28 and a plurality of diaphragm pumps 29, the notch of the finished product slurry tank A18 is used as the input end of the output unit 7, the output ends of the diaphragm pumps 29 are connected in parallel and then used as the output end of the output unit 7, the output end face of the finished product slurry tank A18 is connected with the input end of the feeding pump 28, and the input ends of the diaphragm pumps 29 are connected in parallel and then connected with the output end of the feeding pump 28.
Further, the medium phosphorus ore sorting system further comprises a water supply unit 30, the water supply unit 30 comprises a water cooling tower 31 and a delivery pump 32 which are connected in series, the input end of the water cooling tower 31 is used as the input end of the water supply unit 30, the output end of the delivery pump 32 is used as the output end of the water supply unit 30, and the input ends of the diaphragm pumps 29 are connected in parallel and then connected with the output end of the water supply unit 30.
Further, the medium phosphorus ore sorting system further comprises a water reservoir 33, and the water reservoir 33 is respectively connected with the input ends of the overflow type ball mill A3 and the plurality of diaphragm pumps 29.
The process flow of the phosphorite separation system in use is as follows: the method comprises the steps of firstly, adding the ore lump ore of the medium phosphate ore into a storage hopper by a loader, conveying the phosphate ore to a rubber belt conveyor by a heavy plate feeder below the storage hopper, or conveying the ore of a sieve circle to a jaw crusher by the loader, crushing the ore, then, conveying the crushed ore to the rubber belt conveyor, and then, conveying the phosphate ore to a cone crusher by the rubber belt conveyor for secondary and tertiary crushing. And qualified crushed ore particles of 20mm enter a grinding head storage bin of the grinding machine through a belt conveyor. Qualified phosphate ore enters a wet grinder after being measured by a barrel bin, a disc feeder and a measuring belt conveyor. And grinding the measured water and crushed ore in a grinding machine to obtain ore pulp, screening by using a drum screen, enabling the 100-mesh ore pulp to flow into an ore pulp ground trough through a screen underflow trough, and feeding the unscreened material to an annular belt from a port part of a screen drum to enter the grinding machine for grinding again. The ore pulp in the ore pulp ground groove is pumped to a hydrocyclone by a slag pulp pump, the fine ore pulp which is overflowed from the hydrocyclone and is rich in acid insoluble substances and silica gel is used for producing low-concentration phosphorus compound fertilizers such as nitric phosphate fertilizer or ordinary calcium, 30 percent of bottom flow of coarse ore pulp in the hydrocyclone enters a mill for secondary grinding through a pulp return pipe, 70 percent of bottom flow of the coarse ore pulp enters a coarse ore pulp groove and is pumped to an ore grinding system for normal production through the slag pulp pump, and the coarse ore pulp and the normal ore pulp are mixed for ore preparation. The maximum blending proportion of the medium phosphorus ore can reach more than 60 percent, and the utilization rate of the medium phosphorus ore is greatly improved. After the mixed ore pulp enters a ball mill and is ground, the phosphorite pulp containing the phosphorite with the concentration water content of 45-49 percent and the fineness of 100 meshes and the sieving rate of more than or equal to 80 percent is sent into an ore pulp storage tank and is conveyed to a diaphragm pump room by a feeding pump through two process pipelines, three diaphragm pumps are supplied through two feeding pipelines of the diaphragm pump room, the diaphragm pumps are sent to an ore pulp distribution tank of a thickening system through an ore pulp pipeline, and the phosphorite pulp containing the phosphorite with the concentration water content of 32-35 percent is used for the extraction production of the wet-process phosphoric acid after being thickened by a thickener.
Claims (10)
1. A method for sorting medium phosphorus ore is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: crushing raw ores in a mining area to obtain medium phosphorus ores;
step two: collecting water in nature through a conveying pipeline, and taking the collected water as process water;
step three: mixing the medium phosphorus ore in the step one and the process water in the step two, and then sending the mixture into an overflow ball mill for grinding to obtain ore pulp;
step four: screening the ore pulp obtained in the step three, and screening the ore pulp into ore pulp with medium particle size and primary coarse ore pulp;
step five: returning the primary coarse ore pulp obtained in the fourth step to the overflow ball mill for grinding;
step six: feeding the medium-particle size ore pulp obtained in the step four into a hydrocyclone to enable ore particles in the medium-particle size ore pulp to be subjected to graded sedimentation, obtaining fine ore pulp from an overflow outlet of the hydrocyclone, and obtaining secondary coarse ore pulp from a underflow outlet of the hydrocyclone;
step seven: sending one part of the secondary coarse ore pulp in the step six into the overflow type ball mill in the step three for grinding, adding a proper amount of process water in the step two after mixing the other part of the secondary coarse ore pulp with the primary coarse ore pulp in the step four for blending, and then sequentially sending into the overflow type ball mill and the hydrocyclone for grinding and fractional sedimentation respectively to obtain finished product ore pulp;
step eight: and conveying the finished product ore pulp obtained in the step seven to each production workshop.
2. The method for sorting the middling phosphorus ore according to claim 1, wherein: the particle size of the medium phosphorus ore in the step one is less than 20 mm.
3. The method for sorting the middling phosphorus ore according to claim 1, wherein: the fineness of the medium-particle size ore pulp in the fourth step is less than 100 meshes.
4. The method for sorting the middling phosphorus ore according to claim 1, wherein: and seventhly, the secondary coarse ore pulp which is sent into the overflow ball mill for grinding accounts for 30% of the total amount of the secondary coarse ore pulp.
5. A medium phosphorus ore sorting system which is characterized in that: the device comprises a crushing unit (1), a batching unit (2), an overflow ball mill A (3), a hydrocyclone A (4), a hydrocyclone B (5), a mixed ore blending unit (6) and an output unit (7), wherein overflow outlets are arranged at the tops of the hydrocyclone A (4) and the hydrocyclone B (5), underflow outlets are arranged at the bottoms of the hydrocyclone A (4) and the hydrocyclone B (5), the crushing unit (1) is sequentially connected with the batching unit (2), the overflow ball mill A (3), a rotary screen A (8), a ground trough A (9), a slurry pump A (10) and an input end of the hydrocyclone A (4) in series, the underflow outlet of the hydrocyclone A (4) is sequentially connected with a coarse slurry trough (11), a slurry pump B (12) and an input end of the hydrocyclone B (5) in series, and the underflow outlets of the hydrocyclone A (4) and the hydrocyclone B (5) are connected with the overflow ball mill A (3) in parallel ) The input is connected, and the overflow outlet parallel connection back of hydrocyclone A (4) and hydrocyclone B (5) is as the first output of mesophosphorite ore sorting system, sediment stuff pump B (12) output in proper order with mix ore blending unit (6) and output unit (7) series connection, output unit (7) output is as the second output of mesophosphorite ore sorting system.
6. The middling ore sorting system according to claim 5, wherein: the mixed ore blending unit (6) comprises an overflow ball mill B (13), a rotary screen B (14), a ground trough B (15), a slurry pump C (16), a hydraulic cyclone C (17), a finished ore slurry trough A (18) and a slurry pump D (19) which are sequentially connected in series, wherein the underflow outlet of the hydraulic cyclone C (17) is also connected with the input end of the overflow ball mill B (13), the overflow ball mill B (13) is used as the input end of the mixed ore blending unit (6), and the slurry pump D (19) is used as the output end of the mixed ore blending unit (6).
7. The middling ore sorting system according to claim 6, wherein: the input end of the overflow ball mill B (13) is also connected with a batching unit (2).
8. The system for sorting medium phosphorus ore according to claim 5 or 7, wherein: the batching unit (2) comprises a medium-phosphorus ore storage bin (20), a heavy duty plate feeder (24) and a belt conveyor B (26) which are sequentially connected in series.
9. The middling ore sorting system according to claim 5, wherein: the crushing unit (1) comprises a raw ore storage hopper (23), a heavy plate feeder (24), at least three cone crushers (25) and a plurality of belt conveyors A (22), the output end of the raw ore storage hopper (23) is connected with the input end of the heavy plate feeder (24), any two adjacent cone crushers (25) are connected in series through the belt conveyors A (22), the input end of the first cone crusher (25) is connected with the output end of the heavy plate feeder (24), and the output end of the last cone crusher (25) serves as the output end of the crushing unit (1).
10. The middling ore sorting system according to claim 5, wherein: the output unit (7) comprises a finished product slurry tank B (27), a feeding pump (28) and a plurality of diaphragm pumps (29), the notch of the finished product slurry tank A (18) serves as the input end of the output unit (7), the output ends of the diaphragm pumps (29) serve as the output end of the output unit (7) after being connected in parallel, the output end face of the finished product slurry tank A (18) is connected with the input end of the feeding pump (28), and the input ends of the diaphragm pumps (29) are connected with the output end of the feeding pump (28) after being connected in parallel.
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| US4492627A (en) * | 1982-06-14 | 1985-01-08 | Fmc Corporation | Recovery of phosphorus from waste ponds |
| CN101053853A (en) * | 2007-04-20 | 2007-10-17 | 云南云天化国际化工股份有限公司 | Phosphate rock single stage closed ore milling method |
| CN102814224A (en) * | 2012-08-16 | 2012-12-12 | 任逸 | Process of ore dressing and grinding |
| CN103041909A (en) * | 2013-01-11 | 2013-04-17 | 武汉理工大学 | Coarsness grading process for mineral separation and grinding |
| CN103111361B (en) * | 2013-02-28 | 2015-09-09 | 贵州开磷集团股份有限公司 | A kind of secondary phosphoric ore pulp cyclone separating technology |
| CN103521363B (en) * | 2013-10-19 | 2016-06-22 | 李耀吾 | Low-grade bauxite raw ore open-circuit grinding ore-dressing technique |
| CN205308532U (en) * | 2015-12-29 | 2016-06-15 | 荆门新洋丰中磷肥业有限公司 | Phosphorus ore high concentration flotation device |
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