CN113731629A - Combined beneficiation method for medium-low grade high-silicon phosphorus ore - Google Patents
Combined beneficiation method for medium-low grade high-silicon phosphorus ore Download PDFInfo
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- CN113731629A CN113731629A CN202010473180.0A CN202010473180A CN113731629A CN 113731629 A CN113731629 A CN 113731629A CN 202010473180 A CN202010473180 A CN 202010473180A CN 113731629 A CN113731629 A CN 113731629A
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- photoelectric
- phosphorus
- tailings
- flotation
- ore
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000011574 phosphorus Substances 0.000 title claims abstract description 26
- 229910052710 silicon Inorganic materials 0.000 title abstract description 5
- 239000010703 silicon Substances 0.000 title abstract description 5
- 238000005188 flotation Methods 0.000 claims abstract description 48
- 239000012141 concentrate Substances 0.000 claims abstract description 45
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 20
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 239000002367 phosphate rock Substances 0.000 claims abstract description 12
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims abstract description 11
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000005622 photoelectricity Effects 0.000 claims abstract description 3
- HIVGXUNKSAJJDN-UHFFFAOYSA-N [Si].[P] Chemical compound [Si].[P] HIVGXUNKSAJJDN-UHFFFAOYSA-N 0.000 claims description 16
- 229910019142 PO4 Inorganic materials 0.000 claims description 13
- 239000010452 phosphate Substances 0.000 claims description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 11
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 9
- 239000011707 mineral Substances 0.000 abstract description 9
- 239000004566 building material Substances 0.000 abstract description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000010907 mechanical stirring Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- XLUBVTJUEUUZMR-UHFFFAOYSA-B silicon(4+);tetraphosphate Chemical compound [Si+4].[Si+4].[Si+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XLUBVTJUEUUZMR-UHFFFAOYSA-B 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- -1 phosphate compound Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a combined beneficiation method for medium-low grade high-silicon phosphorus ore, which comprises the steps of crushing and grading raw ore, enabling a grading sieve hole to be A, enabling products on the sieve to enter a photoelectric concentrating machine I for photoelectric concentration, and obtaining photoelectric phosphorus concentrate and photoelectric phosphorus tailings through separation; the photoelectricity phosphorus concentrate and the undersize product are merged and enter a grinder for grinding, and then the ore pulp which reaches the flotation requirement granularity enters a flotation machine for flotation operation to obtain final phosphorus concentrate and phosphorus tailings; and (4) conveying the photoelectric phosphorus tailings to a second photoelectric concentrating machine for photoelectric concentration, and separating to obtain concentrate silica and tailings. The method adopts three-section separation operation flow, and gangue minerals with high silicate content are pre-separated through photoelectric separation, so that the operation amount of ore grinding and flotation is reduced. Gangue minerals separated by photoelectric separation of tailings can be effectively used for producing yellow phosphorus, building materials and other industries. The method not only achieves the purpose of improving the grade of the phosphorite, but also makes full use of the tailings and reduces the subsequent tailing treatment cost.
Description
Technical Field
The invention relates to a phosphate ore dressing technology, in particular to a combined ore dressing method for medium and low grade high silicon phosphate ore.
Background
Although the total amount of phosphate rock resources is internationally dominant in China, P2O5Over 30 percent of high-grade phosphate ore is gradually exhausted, and the resource reserves of medium and low grades are increasingly scarce. According to the data display, P2O5Over 30 percent of high-grade phosphate ore is distributed in Guizhou, and Hubei, Sichuan and Yunnan account for only about 20 percentAnd (4) right. At present, 167.57 million of phosphorite resource reserves are found in China, and more than 90 percent of phosphorite resources are medium-low grade phosphorite, so to ensure that the phosphate chemical industry support is continuously developed and strengthened and solve the problem of resource shortage of national grade phosphate compound fertilizer bases, key technical research and industrialized development of medium-low grade phosphorite processing and utilization must be strengthened.
At present, the technically feasible method for the ore dressing of phosphorite mainly comprises the following steps: flotation, scrubbing and desliming, heavy medium beneficiation, photoelectric beneficiation and the like. The flotation process is characterized in that a flotation reagent is added into alkaline or acidic ore pulp to separate phosphorus-containing minerals from silicate gangue minerals or carbonate gangue minerals, so as to respectively obtain concentrate and tailings. Is suitable for various minerals, but has high medicament cost and produces a large amount of tailings and production wastewater. From the actual condition of the current production, the selected grade P2O5More than 25 percent, the recovery rate is more than 95 percent, and the selected grade P2O5About 20 percent and the recovery rate is only about 80 percent.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a combined beneficiation method for medium and low grade high silicon phosphate ore, which has good separation effect, can effectively utilize phosphate ore and has low production cost.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a combined beneficiation method for medium and low grade high silicon phosphorus ore, which is characterized in that: the method comprises the following steps:
(1) crushing and grading raw ores: crushing raw phosphorite ore, and grading to obtain an oversize product A-40 mm and an undersize product-A, wherein the grading sieve pore is A, and A is 10-30 mm;
(2) the first photoelectric selection: enabling the oversize product with the size of A-40 mm to enter a first photoelectric concentrator for photoelectric separation, and separating to obtain photoelectric phosphorus separation concentrate and photoelectric phosphorus separation tailings;
(3) flotation: the photoelectricity selected phosphate concentrate and the undersize product of-A are combined and enter a grinder for grinding, and then ore pulp reaching the flotation requirement granularity enters a flotation machine for flotation operation to obtain final phosphate concentrate and phosphate tailings;
(4) II, photoelectric selection: and (4) conveying the photoelectric phosphorus tailings to a second photoelectric concentrating machine for photoelectric concentration, and separating to obtain concentrate silica and tailings.
The invention relates to a combined beneficiation method for medium and low grade high silicon phosphorus ore, which particularly adopts a further preferable technical scheme that: in the raw ore: p2O518-25% of SiO2The content is 17-25%.
The invention relates to a combined beneficiation method for medium and low grade high silicon phosphorus ore, which particularly adopts a further preferable technical scheme that: the grading sieve hole A is 10mm or 15 mm.
The invention relates to a combined beneficiation method for medium and low grade high silicon phosphorus ore, which particularly adopts a further preferable technical scheme that: the concentrated silica obtained by sorting is used as an additive for producing yellow phosphorus.
The invention relates to a combined beneficiation method for medium and low grade high silicon phosphorus ore, which particularly adopts a further preferable technical scheme that: the flotation operation adopts positive flotation or reverse flotation.
Compared with the prior art, the invention has the following beneficial effects:
the method adopts three-section (photoelectric separation, flotation and photoelectric separation) separation operation flows, gangue minerals with high silicate content are separated in advance through photoelectric separation, the ore amount entering grinding and flotation operation is reduced, the production cost is reduced, and the content of phosphorus minerals in the ores is relatively improved. Gangue minerals separated by photoelectric separation of tailings can be effectively used for producing yellow phosphorus, building materials and other industries. The method not only achieves the purpose of improving the grade of the phosphorite, but also makes full use of the tailings, reduces the amount of the tailings and reduces the subsequent tailing treatment cost.
The photoelectric ore dressing in the method is physical ore dressing, does not need an ore dressing medium and a medicament, and has low consumption; i photoelectric sorting discarding P in advance2O5The waste rock with low content reduces the treatment capacity of subsequent ore grinding and flotation operation, the flotation scale is reduced to 60 percent of that of the original direct flotation, and the equipment investment and the operation cost are saved; performing photoelectric separation on tailings obtained by the first photoelectric separation and the second photoelectric separation again to generate concentrate silica which can be used as an additive for producing yellow phosphorus, wherein the tailings are used as a building material; selectionGrade is improved to P2O5 The flotation recovery rate is greatly improved to more than 95 percent (about 20 percent of direct flotation, the recovery rate is about 80 percent, the index of the concentrate is poor), the quantity of the tailings is reduced by more than 75 percent, the treatment of the tailings is reduced, and the national environmental protection policy is responded.
The method can effectively solve the difficult problem of difficult separation of the medium-low grade high-silicon phosphorite, reduces the stockpiling amount of the tailings, reduces the cost of later-stage tailing treatment, and achieves the purpose of grading and utilizing the ores. The method can be used for middle-low grade and high-silicon phosphorite, and is particularly suitable for P2O5Phosphate ore with grade below 22%; environmental protection, easy industrialization, and obvious economic and social benefits.
Detailed Description
The following further describes particular embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
Embodiment 1, a combined beneficiation method for medium and low grade high silicon phosphorus ore:
certain middle-low grade, high silicon phosphorus ore (P)2O5 21%，SiO2 22%) and the granularity of the raw ore is 300mm, the granularity of the raw ore is 40mm after being crushed by a crusher, after being screened by a screening machine, the oversize product with the granularity of 15 mm-40 mm is sent to a photoelectric concentrator I by a rubber belt conveyor to be sorted to obtain concentrate and tailings, wherein P in the concentrate is2O5Grade 29.05%, P in tailings2O5The grade is about 10.00%. And (3) conveying the concentrate obtained by the photoelectric concentrator I to a mill through a rubber belt conveyor, combining the concentrate with minus 15mm undersize products, grinding the ore to obtain ore pulp with the grinding fineness of minus 200 meshes and the concentration of about 67.30%, and conveying the ore pulp to a pre-flotation pulp conditioning tank through a pump. And adding a regulator into the drop-regulating tank, adjusting the pH value to be about 4.5-5.5, allowing the ore pulp to enter an inflatable mechanical stirring flotation machine for reverse flotation, adding a collecting agent, taking a foam product of the flotation machine as tailings, and taking a product in the flotation machine tank as concentrate. And conveying the tailings obtained by the photoelectric concentrator I to the photoelectric concentrator II by using a belt conveyor for sorting to obtain concentrate and tailings, wherein the produced concentrate silica can be used as a yellow phosphorus additive, and the tailings can be used as a building material. Finally, the product is processedThe phosphorus concentrate grade was 31.00%, the phosphorus tailings grade 5.06%, the concentrate yield 72.22% (where phosphorus concentrate yield 54.82%, silica yield 17.40%), the flotation stage recovery 97%, and the overall recovery 93.36% (where P is2O5Recovery 80.93%, silica recovery 12.43%) and tailings yield 10.38%.
This example process compares to the direct flotation process, flotation stage P2O5The recovery rate is improved from 80% to 97%, and the total tailing yield is reduced from 44% to 14.26%. Taking the scale of 100 kiloton/a as an example, the tailing amount is reduced by 29.74 kiloton/a.
Embodiment 2, a combined beneficiation method for medium and low grade high silicon phosphorus ore:
certain middle-low grade, high silicon phosphorus ore (P)2O5 20%，SiO2 19 percent), the granularity of the raw ore is 350mm, the granularity of the raw ore is 40mm after the raw ore is crushed by a crusher, after the raw ore is screened by a screening machine, the oversize product with the granularity of 10 mm-40 mm is sent to a photoelectric concentrator I by a rubber belt conveyor to be sorted to obtain concentrate and tailings, wherein P in the concentrate is2O5Grade of 26.00 percent and P in tailings2O5The grade is about 9.04%. And (3) conveying the concentrate obtained by the photoelectric concentrator I to a mill through a rubber belt conveyor, combining the concentrate with minus 10mm undersize products, grinding the ore to obtain ore pulp with the grinding fineness of minus 200 meshes and about 70%, and conveying the ore pulp to a pre-flotation size mixing tank through a pump. And adding a regulator into the drop-regulating tank, adjusting the pH value to about 4-5, allowing the ore pulp to enter an inflatable mechanical stirring flotation machine for reverse flotation, adding a collecting agent, taking a foam product of the flotation machine as tailings, and taking a product in the flotation machine tank as concentrate. And conveying the tailings obtained by the photoelectric concentrator I to the photoelectric concentrator II by using a belt conveyor for sorting to obtain concentrate and tailings, wherein the produced concentrate silica can be used as a yellow phosphorus additive, and the tailings can be used as a building material. 30.50% phosphorus concentrate grade, 5.57% phosphorus tailings grade, 66.87% concentrate yield (wherein the phosphorus concentrate yield is 53.57% and the silica yield is 13.30%), 96% recovery in the flotation stage, and 91.70% overall recovery (wherein P is2O5Recovery 81.70%, silica recovery 10.00%) and tailings yield 13.43%.
Embodiment 3, a combined beneficiation method for medium and low grade high silicon phosphorus ore:
certain middle-low grade, high silicon phosphorus ore (P)2O5 22%，SiO2 20 percent), the granularity of the raw ore is 250mm, the granularity of the raw ore is 40mm after being crushed by a crusher, after being screened by a screening machine, the oversize product with the granularity of 12 mm-40 mm is sent to a photoelectric concentrator I by a rubber belt conveyor to be sorted to obtain concentrate and tailings, wherein P in the concentrate is2O5Grade 29.55%, P in tailings2O5The grade is about 10.26%. And (3) conveying the concentrate obtained by the photoelectric concentrator I to a mill through a rubber belt conveyor, combining the concentrate with minus 12mm undersize products, grinding the ore to obtain ore pulp with the grinding fineness of minus 200 meshes of about 68.00%, and conveying the ore pulp to a pre-flotation size mixing tank through a pump. And adding a regulator into the drop-regulating tank, adjusting the pH value to about 4-5, allowing the ore pulp to enter an inflatable mechanical stirring flotation machine for reverse flotation, adding a collecting agent, taking a foam product of the flotation machine as tailings, and taking a product in the flotation machine tank as concentrate. And conveying the tailings obtained by the photoelectric concentrator I to the photoelectric concentrator II by using a belt conveyor for sorting to obtain concentrate and tailings, wherein the produced concentrate silica can be used as a yellow phosphorus additive, and the tailings can be used as a building material. The final phosphorus concentrate grade was 32.00%, the phosphorus tailings grade was 7.79%, the concentrate yield was 72.32% (where phosphorus concentrate yield was 55.23%, silica yield was 17.09%), the recovery rate in the flotation stage was 95.50%, and the overall recovery rate was 92.74% (where P was2O5Recovery 80.33%, silica recovery 12.41%), tailing yield 10.67%.
Claims (5)
1. A combined beneficiation method for medium and low grade high silicon phosphorus ore is characterized by comprising the following steps: (1) crushing and grading raw ores: crushing raw phosphorite ore, and grading to obtain an oversize product A-40 mm and an undersize product-A, wherein the grading sieve pore is A, and A is 10-30 mm;
the first photoelectric selection: enabling the oversize product with the size of A-40 mm to enter a first photoelectric concentrator for photoelectric separation, and separating to obtain photoelectric phosphorus separation concentrate and photoelectric phosphorus separation tailings;
flotation: the photoelectricity selected phosphate concentrate and the undersize product of-A are combined and enter a grinder for grinding, and then ore pulp reaching the flotation requirement granularity enters a flotation machine for flotation operation to obtain final phosphate concentrate and phosphate tailings;
II, photoelectric selection: and (4) conveying the photoelectric phosphorus tailings to a second photoelectric concentrating machine for photoelectric concentration, and separating to obtain concentrate silica and tailings.
2. The combined beneficiation method for the medium and low grade high silicon phosphorus ore according to the claim 1, which is characterized in that: in the raw ore: p2O518-25% of SiO2The content is 17-25%.
3. The combined beneficiation method for the medium and low grade high silicon phosphorus ore according to the claim 1, which is characterized in that: the grading sieve hole A is 10mm or 15 mm.
4. The combined beneficiation method for the medium and low grade high silicon phosphorus ore according to the claim 1, which is characterized in that: the concentrated silica obtained by sorting is used as an additive for producing yellow phosphorus.
5. The combined beneficiation method for the medium and low grade high silicon phosphorus ore according to the claim 1, which is characterized in that: the flotation operation adopts positive flotation or reverse flotation.
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| CN202010473180.0A CN113731629A (en) | 2020-05-29 | 2020-05-29 | Combined beneficiation method for medium-low grade high-silicon phosphorus ore |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010473180.0A CN113731629A (en) | 2020-05-29 | 2020-05-29 | Combined beneficiation method for medium-low grade high-silicon phosphorus ore |
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| CN202010473180.0A Pending CN113731629A (en) | 2020-05-29 | 2020-05-29 | Combined beneficiation method for medium-low grade high-silicon phosphorus ore |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327809A (en) * | 2011-10-12 | 2012-01-25 | 湖南省矿产测试利用研究所 | Method for removing magnesium oxide from collophanite |
| CN104261361A (en) * | 2014-09-11 | 2015-01-07 | 云南红富化肥有限公司 | Washing and direct flotation method of low-grade refractory argillaceous phosphorite |
| CN110449255A (en) * | 2019-07-23 | 2019-11-15 | 中国地质科学院郑州矿产综合利用研究所 | Fluorite lean ore color separation upgrading-tailing discarding preselection method |
| CN110694788A (en) * | 2019-10-30 | 2020-01-17 | 中蓝长化工程科技有限公司 | Beneficiation method for high-calcium-magnesium type low-grade spodumene ore |
-
2020
- 2020-05-29 CN CN202010473180.0A patent/CN113731629A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327809A (en) * | 2011-10-12 | 2012-01-25 | 湖南省矿产测试利用研究所 | Method for removing magnesium oxide from collophanite |
| CN104261361A (en) * | 2014-09-11 | 2015-01-07 | 云南红富化肥有限公司 | Washing and direct flotation method of low-grade refractory argillaceous phosphorite |
| CN110449255A (en) * | 2019-07-23 | 2019-11-15 | 中国地质科学院郑州矿产综合利用研究所 | Fluorite lean ore color separation upgrading-tailing discarding preselection method |
| CN110694788A (en) * | 2019-10-30 | 2020-01-17 | 中蓝长化工程科技有限公司 | Beneficiation method for high-calcium-magnesium type low-grade spodumene ore |
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| Title |
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