CN113399121A - Flotation process for recovering low-grade phosphorus from fine-fraction iron-dressing tailing slime containing copper and phosphorus - Google Patents
Flotation process for recovering low-grade phosphorus from fine-fraction iron-dressing tailing slime containing copper and phosphorus Download PDFInfo
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- CN113399121A CN113399121A CN202110676325.1A CN202110676325A CN113399121A CN 113399121 A CN113399121 A CN 113399121A CN 202110676325 A CN202110676325 A CN 202110676325A CN 113399121 A CN113399121 A CN 113399121A
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
- B03D2203/06—Phosphate ores
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Abstract
The invention relates to a flotation process for recovering low-grade phosphorus from fine-fraction iron separation tailings slime containing copper and phosphorus, which adopts overflow of iron separation tailings treated by an inclined plate thickener as raw materials, wherein the overflow comprises 2-3% of phosphorus minerals and 0.015-0.050% of copper minerals, and comprises the following steps. The invention carries out concentration treatment on the fine-grained phosphorus-containing iron tailings, and after carrying out primary roughing, primary scavenging and multiple concentration operations after copper removal by flotation, the grade of the produced phosphorus concentrate exceeds 36%. The recovery rate of phosphorus in the fine-grained iron tailings exceeds 59%, and flotation equipment adopts an inflatable mechanical stirring flotation machine.
Description
Technical Field
The invention relates to the technical field of mineral separation, in particular to a flotation process for recovering low-grade phosphorus from fine-grained iron separation tailings slime containing copper and phosphorus.
Background
With the development and utilization of mineral resources, research on the comprehensive recycling of resources has become a current topic of intense research. Is an important chemical mineral raw material. It can be used to prepare phosphate fertilizer, yellow phosphorus, phosphoric acid, phosphide and other phosphates, and is used in medicine, food, match, dye, sugar, ceramics and national defence. The method has the advantages that the ultralow-grade phosphorite resource is recovered from the fine-grade iron tailings, the comprehensive utilization of mineral resources is realized, and the method has positive significance for improving the economic benefit of the mine and prolonging the mine income.
According to the national relevant standard, the boundary grade of phosphorite is 5-6%, while the grade of phosphorus in the resource is 2-3%, the fineness is finer, and-0.038 mm accounts for 90%, the difficulty of phosphorus recovery is further increased, and the recovery is difficult in reality.
Disclosure of Invention
The invention aims to provide a flotation process for recovering low-grade phosphorus from fine-fraction iron tailings containing copper and phosphorus, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the flotation process for recovering low-grade phosphorus from the slime of fine-grained iron separation tailings containing copper and phosphorus adopts the overflow of the iron separation tailings treated by an inclined plate thickener as raw materials, wherein the overflow comprises 2 to 3 percent of phosphorus mineral and 0.015 to 0.050 percent of copper mineral, and is characterized by comprising the following steps of:
the method comprises the following steps: concentrating and desliming the ore pulp overflowing from the inclined plate thickener, wherein the desliming adopts a swirler device, the feeding concentration of the swirler is 8-10%, the underflow concentration of the swirler is 28-32%, the underflow material of the swirler is fed into a stirring barrel, and meanwhile, a dosing machine is utilized to add No. 2 oil and xanthate into the stirring barrel;
step two: copper in the tailings exists in a sulfide form, materials in the stirring barrel are fed into an inflatable mechanical stirring flotation machine for copper removal flotation, and the flotation time is not less than 14 min;
step three: feeding the ore pulp obtained in the step two into a stirring barrel, adding oxidized paraffin soap and a water glass medicament into the stirring barrel, uniformly stirring, and feeding into an inflatable mechanical stirring flotation machine for phosphorus roughing operation, wherein the roughing operation time is not less than 15 min;
step four: feeding the waste treated in the third step into an inflatable stirring flotation machine for scavenging to perform phosphorus recovery scavenging again, wherein the scavenging operation time is not less than 10min, and conveying the concentrate obtained after scavenging to the third step for roughing;
step five: selecting the rough concentrate obtained in the fourth step by adopting an inflatable mechanical stirring flotation machine, wherein the time of primary selection is not less than 20min, the concentrate obtained after the primary selection is fed to the flotation machine for secondary selection, and the tailings obtained after the primary selection are returned to the rough selection operation in the third step;
step six: selecting the concentrate obtained in the fifth step by adopting an inflatable mechanical stirring flotation machine, wherein the secondary selection time is not less than 25 min; feeding the concentrate obtained after the secondary concentration to a flotation machine for tertiary concentration, and returning the tailings obtained after the secondary concentration to the step five for primary concentration operation;
step seven: selecting the concentrate obtained in the sixth step by adopting an inflatable mechanical stirring flotation machine, selectively adding water glass according to the quality of the concentrate, and selecting for at least 30min for three times; and the concentrate obtained after the third concentration is the final concentrate, the phosphorus grade is over 36 percent, and the tailings obtained after the third concentration are returned to the six-time and two-time concentration operation.
Preferably, the first step is performed with a pulp concentration process, so as to provide a stable pulp concentration for the subsequent flotation and ensure the flotation fingers.
Preferably, copper sulfide in the minerals is removed firstly in the second step, so that the influence on the subsequent phosphorus selection index is avoided.
Preferably, the processes of the fifth step to the seventh step are all selection operations, the selection of the selection operation times is adjusted according to the actual production situation on site, the selection tailings are returned to the previous stage for re-selection operation, and the flotation time of the selection operation is continuously increased along with the increase of the number of selection stages.
Preferably, the selected flotation machines are all inflatable mechanical stirring flotation machines, and the flotation machines adopt blowers for blowing air.
Compared with the prior art, the invention has the beneficial effects that:
the invention carries out concentration treatment on fine-grained phosphorus-containing iron tailings, and after carrying out primary roughing, primary scavenging and multiple concentration operations after copper is removed by flotation, the grade of the produced phosphorus concentrate exceeds 36%. The recovery rate of phosphorus in the fine-grained iron tailings exceeds 59%, flotation equipment adopts an inflatable mechanical stirring flotation machine, and used flotation agents comprise oxidized paraffin soap, water glass, 2# oil and xanthate; the method greatly improves the added value of mineral products for recovering phosphorus in fine-fraction iron tailings, realizes the recovery of phosphorus resources in fine-fraction iron tailings, and has remarkable economic and social benefits.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The flotation process for recovering low-grade phosphorus from the fine-fraction iron ore tailings containing copper and phosphorus adopts overflow of the iron ore tailings after being treated by an inclined plate thickener as a raw material, wherein the overflow comprises 2% of phosphorus mineral and 0.015% of copper mineral, and is characterized by comprising the following steps:
the method comprises the following steps: concentrating and desliming the ore pulp overflowing from the inclined plate thickener, wherein the desliming adopts a swirler device, the feeding concentration of the swirler is 8%, the underflow concentration of the swirler is 28%, the underflow material of the swirler is fed into a stirring barrel, and meanwhile, a dosing machine is used for adding No. 2 oil and xanthate into the stirring barrel;
step two: copper in the tailings exists in a sulfide form, materials in the stirring barrel are fed into an inflatable mechanical stirring flotation machine for copper removal flotation, and the flotation time is not less than 14 min;
step three: feeding the ore pulp obtained in the step two into a stirring barrel, adding oxidized paraffin soap and a water glass medicament into the stirring barrel, uniformly stirring, and feeding into an inflatable mechanical stirring flotation machine for phosphorus roughing operation, wherein the roughing operation time is not less than 15 min;
step four: feeding the waste treated in the third step into an inflatable stirring flotation machine for scavenging to perform phosphorus recovery scavenging again, wherein the scavenging operation time is not less than 10min, and conveying the concentrate obtained after scavenging to the third step for roughing;
step five: selecting the rough concentrate obtained in the fourth step by adopting an inflatable mechanical stirring flotation machine, wherein the time of primary selection is not less than 20min, the concentrate obtained after the primary selection is fed to the flotation machine for secondary selection, and the tailings obtained after the primary selection are returned to the rough selection operation in the third step;
step six: selecting the concentrate obtained in the fifth step by adopting an inflatable mechanical stirring flotation machine, wherein the secondary selection time is not less than 25 min; feeding the concentrate obtained after the secondary concentration to a flotation machine for tertiary concentration, and returning the tailings obtained after the secondary concentration to the step five for primary concentration operation;
step seven: selecting the concentrate obtained in the sixth step by adopting an inflatable mechanical stirring flotation machine, selectively adding water glass according to the quality of the concentrate, and selecting for at least 30min for three times; and the concentrate obtained after the third concentration is the final concentrate, the phosphorus grade is over 36 percent, and the tailings obtained after the third concentration are returned to the six-time and two-time concentration operation.
In the first step of this embodiment, a pulp concentration process is performed to provide a stable pulp concentration for the subsequent flotation, thereby ensuring the flotation fingers.
In the second step of this example, copper sulfide in the minerals is removed first, so as to avoid the influence on the subsequent phosphorus selection index.
The processes of the fifth step and the seventh step of the embodiment are all selection operations, the selection of the selection operation times is adjusted according to the actual production situation on site, the selection tailings are returned to the previous stage for re-selection operation, and the flotation time of the selection operation is continuously increased along with the increase of the number of selection stages.
The flotation machines selected for use in this embodiment are all inflatable mechanical agitation flotation machines, and the flotation machines are air blasted by air blowers.
Example 2.
The flotation process for recovering low-grade phosphorus from the fine-fraction iron tailings slime containing copper and phosphorus adopts the overflow of iron tailings after being treated by an inclined plate thickener as a raw material, wherein the overflow comprises 3% of phosphorus minerals and 0.050% of copper minerals, and is characterized by comprising the following steps of:
the method comprises the following steps: concentrating and desliming the ore pulp overflowing from the inclined plate thickener, wherein the desliming adopts a swirler device, the feeding concentration of the swirler is 10%, the underflow concentration of the swirler is 32%, the underflow material of the swirler is fed into a stirring barrel, and meanwhile, a dosing machine is used for adding No. 2 oil and xanthate into the stirring barrel;
step two: copper in the tailings exists in a sulfide form, materials in the stirring barrel are fed into an inflatable mechanical stirring flotation machine for copper removal flotation, and the flotation time is not less than 14 min;
step three: feeding the ore pulp obtained in the step two into a stirring barrel, adding oxidized paraffin soap and a water glass medicament into the stirring barrel, uniformly stirring, and feeding into an inflatable mechanical stirring flotation machine for phosphorus roughing operation, wherein the roughing operation time is not less than 15 min;
step four: feeding the waste treated in the third step into an inflatable stirring flotation machine for scavenging to perform phosphorus recovery scavenging again, wherein the scavenging operation time is not less than 10min, and conveying the concentrate obtained after scavenging to the third step for roughing;
step five: selecting the rough concentrate obtained in the fourth step by adopting an inflatable mechanical stirring flotation machine, wherein the time of primary selection is not less than 20min, the concentrate obtained after the primary selection is fed to the flotation machine for secondary selection, and the tailings obtained after the primary selection are returned to the rough selection operation in the third step;
step six: selecting the concentrate obtained in the fifth step by adopting an inflatable mechanical stirring flotation machine, wherein the secondary selection time is not less than 25 min; feeding the concentrate obtained after the secondary concentration to a flotation machine for tertiary concentration, and returning the tailings obtained after the secondary concentration to the step five for primary concentration operation;
step seven: selecting the concentrate obtained in the sixth step by adopting an inflatable mechanical stirring flotation machine, selectively adding water glass according to the quality of the concentrate, and selecting for at least 30min for three times; and the concentrate obtained after the third concentration is the final concentrate, the phosphorus grade is over 36 percent, and the tailings obtained after the third concentration are returned to the six-time and two-time concentration operation.
In the first step of this embodiment, a pulp concentration process is performed to provide a stable pulp concentration for the subsequent flotation, thereby ensuring the flotation fingers.
In the second step of this example, copper sulfide in the minerals is removed first, so as to avoid the influence on the subsequent phosphorus selection index.
The processes of the fifth step and the seventh step of the embodiment are all selection operations, the selection of the selection operation times is adjusted according to the actual production situation on site, the selection tailings are returned to the previous stage for re-selection operation, and the flotation time of the selection operation is continuously increased along with the increase of the number of selection stages.
The flotation machines selected for use in this embodiment are all inflatable mechanical agitation flotation machines, and the flotation machines are air blasted by air blowers.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The flotation process for recovering low-grade phosphorus from the slime of the fine-grained iron separation tailings containing copper and phosphorus is characterized in that the overflow of the iron separation tailings treated by an inclined plate thickener is used as a raw material, wherein the overflow comprises phosphorus minerals and copper minerals, the grade of the phosphorus minerals is 2-3%, and the grade of the copper minerals is 0.015-0.050%, and the flotation process is characterized by comprising the following steps:
the method comprises the following steps: concentrating and desliming the ore pulp overflowing from the inclined plate thickener, wherein the desliming adopts a swirler device, the feeding concentration of the swirler is 8-10%, the underflow concentration of the swirler is 28-32%, the underflow material of the swirler is fed into a stirring barrel, and meanwhile, a dosing machine is utilized to quantitatively add No. 2 oil and xanthate into the stirring barrel;
step two: copper in the tailings exists in a sulfide form, materials in the stirring barrel are fed into an inflatable mechanical stirring flotation machine for copper removal flotation, and the flotation time is not less than 14 min;
step three: feeding the ore pulp obtained in the step two into a stirring barrel, adding oxidized paraffin soap and a water glass medicament into the stirring barrel, uniformly stirring, and feeding into an inflatable mechanical stirring flotation machine for phosphorus roughing operation, wherein the roughing operation time is not less than 15 min;
step four: feeding the waste treated in the third step into an inflatable stirring flotation machine for scavenging to perform phosphorus recovery scavenging again, wherein the scavenging operation time is not less than 10min, and conveying the concentrate obtained after scavenging to the third step for roughing;
step five: selecting the rough concentrate obtained in the fourth step by adopting an inflatable mechanical stirring flotation machine, wherein the time of primary selection is not less than 20min, the concentrate obtained after the primary selection is fed to the flotation machine for secondary selection, and the tailings obtained after the primary selection are returned to the rough selection operation in the third step;
step six: selecting the concentrate obtained in the fifth step by adopting an inflatable mechanical stirring flotation machine, wherein the secondary selection time is not less than 25 min; feeding the concentrate obtained after the secondary concentration to a flotation machine for tertiary concentration, and returning the tailings obtained after the secondary concentration to the step five for primary concentration operation;
step seven: selecting the concentrate obtained in the sixth step by adopting an inflatable mechanical stirring flotation machine, selectively adding water glass according to the quality of the concentrate, and selecting for at least 30min for three times; and the concentrate obtained after the third concentration is the final concentrate, the phosphorus grade is over 36 percent, and the tailings obtained after the third concentration are returned to the six-time and two-time concentration operation.
2. The flotation process for recovering low-grade phosphorus from copper-phosphorus-containing fine fraction iron separation tailings slurry according to claim 1, wherein a slurry concentration process is performed in the first step, so that stable slurry concentration is provided for subsequent flotation, and flotation fingers are guaranteed.
3. The flotation process for recovering low-grade phosphorus from fine fraction iron tailings slime containing copper and phosphorus according to claim 1, wherein in the second step, copper sulfide in the ore is removed firstly, so that the influence of the copper sulfide on the subsequent phosphorus selection index is avoided.
4. The flotation process for recovering low-grade phosphorus from fine-grained iron tailings containing copper and phosphorus according to claim 1, wherein the five-step to seven-step processes are all concentration operations, the selection of the concentration operation times is adjusted according to actual production conditions on site, the concentration tailings are returned to the previous stage for re-concentration operation, and the flotation time is continuously increased along with the increase of the number of concentration stages.
5. The flotation process for recovering low-grade phosphorus from fine-grained iron tailings containing copper and phosphorus according to claims 1 to 4, wherein all the flotation machines are inflatable mechanical stirring flotation machines, and the flotation machines are blown by air blowers.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164151A (en) * | 2021-12-03 | 2022-03-11 | 承德宝通矿业有限公司 | Phosphate-solubilizing complex microbial inoculant and application thereof |
| CN114289178A (en) * | 2021-12-26 | 2022-04-08 | 承德市双滦建龙矿业有限公司 | Beneficiation method for recycling fine-grained phosphorus by using cyclone-flotation column |
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| CN112474065A (en) * | 2020-11-06 | 2021-03-12 | 中南大学 | Method for selecting phosphorus from low-grade vanadium titano-magnetite tailings |
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| CN101905190A (en) * | 2010-07-05 | 2010-12-08 | 北京矿冶研究总院 | Collophanite beneficiation method |
| CN102728477A (en) * | 2012-07-05 | 2012-10-17 | 河北联合大学 | Mineral processing technology for comprehensively recycling iron phosphate from low-grade high phosphorus vanadium titanium magnetite |
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| CN114164151A (en) * | 2021-12-03 | 2022-03-11 | 承德宝通矿业有限公司 | Phosphate-solubilizing complex microbial inoculant and application thereof |
| CN114289178A (en) * | 2021-12-26 | 2022-04-08 | 承德市双滦建龙矿业有限公司 | Beneficiation method for recycling fine-grained phosphorus by using cyclone-flotation column |
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