CN109351481A - A kind of phosphorus ore calcining-digestion-reverse flotation separating technology - Google Patents
A kind of phosphorus ore calcining-digestion-reverse flotation separating technology Download PDFInfo
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- CN109351481A CN109351481A CN201811450479.3A CN201811450479A CN109351481A CN 109351481 A CN109351481 A CN 109351481A CN 201811450479 A CN201811450479 A CN 201811450479A CN 109351481 A CN109351481 A CN 109351481A
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- digestion
- ore
- reverse flotation
- separating technology
- phosphorus
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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
- B03D2203/04—Non-sulfide ores
- B03D2203/06—Phosphate ores
Abstract
The invention discloses a kind of phosphorus ore calcining-digestion-reverse flotation separating technologies, comprising the following steps: (1) low-grade phosphate ore is obtained digestion ore pulp through calcining, digestion process；(2) dispersing agent, collecting agent and foaming agent are sequentially added into digestion ore pulp obtained in step (1) and carries out reverse flotation (for removing the impurity such as calcium, magnesium), reverse flotation foam is tailing, is phosphorus concentrate in slot.Dispersing agent, collecting agent and foaming agent is added in digestion ore pulp in the present invention, separates calcium hydroxide, magnesium hydroxide with phosphorus ore, and separative efficiency is high, and obtained phosphorus concentrate product meets JCKPA kiln-process phosphoric acid process requirements.In addition, the present invention has many advantages, such as that process flow is simple, treating capacity is big, strong to adaptability to raw material, have a vast market foreground.
Description
Technical field
The invention belongs to ore processing field more particularly to a kind of purification process techniques of low-grade phosphate ore.
Background technique
Phosphorous chemical industry is one of pillar industry of Chinese national economy, and the phosphate fertilizer for mainly serving for ensuring China's grain-production supplies
It answers.The annual P in China at present2O5Consumption figure has reached 10,000,000 tons or more, in addition, domestic annual phosphate consumes P2O5It is 300
Ten thousand tons or so.Although China is the phosphor resource big country of the second in the world, 10,000,000,000 tons of gross reserves or more, but meet phosphoric acid by wet process and heat
The rock phosphate in powder of the traditional processing technologies such as method phosphoric acid only accounts for 7% or so of gross reserves, 85% or more the siliceous rock phosphate in powder of low-grade calcium
(collophane) does not obtain effective exploitation utilization.
The JCKPA kiln-process phosphoric acid technology of China's independent development has energy-saving and environmental protection, product phosphoric acid quality height, can make
With mid low grade phosphate rock, without tailings discharge the features such as.JCKPA kiln-process phosphoric acid technique is P to the quality requirements of phosphorus ore raw material2O5Contain
Amount is greater than 20%, CaO/P2O5Mass ratio is less than 1.7, and the siliceous phosphorus ore ore P of low-grade calcium2O5Content is generally 16% or so,
CaO/P2O5Mass ratio is greater than 2.0, can not directly use.Therefore, the technology for seeking effectively to remove calcium and magnesium is particularly important.
Currently, the technique of the low-grade siliceous phosphorus ore removing calcium and magnesium of calcium is mainly roasting-digestion-desliming process.
Calcining-digestion-desliming process, by muck, ore grinding, is calcined and disappears using the siliceous phosphorus ore of low-grade calcium as raw material
Change, obtains digestion ore pulp, then use hydrocyclone or the methods of gravity treatment or screening, make calcium hydroxide, magnesium hydroxide and phosphorus ore
Separation.Digestion ore pulp separation is carried out using hydrocyclone, since the density contrast of calcium hydroxide, magnesium hydroxide and phosphorus ore is smaller,
Part microfine phosphorus ore can enter overflow as tailing with calcium hydroxide, magnesium hydroxide suspension.And it is outstanding in hydrocyclone sand
Turbid can also bring part calcium hydroxide and magnesium hydroxide into, to influence phosphorus concentrate quality and the rate of recovery.There are phosphorus to return for gravity separation method
Yield is low, processing capacity is small, occupies the problems such as plant area is big.Though sieve method can obtain preferable Separation Indexes, exists and divide
From low efficiency, the easy fouling of sieve, it is difficult to the problems such as being engineered.Therefore, phosphorus ore digestion ore pulp efficiently separates technology needs
Further research and development.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, one kind is provided
Process flow is simple, treating capacity is big, phosphorus ore strong to adaptability to raw material, good separating effect calcining-digestion-reverse flotation separates work
Skill.In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of phosphorus ore calcining-digestion-reverse flotation separating technology, comprising the following steps:
(1) low-grade phosphate ore is obtained into digestion ore pulp through calcining, digestion process；
(2) dispersing agent, collecting agent and foaming agent are sequentially added into digestion ore pulp obtained in step (1) and carries out reverse flotation
(for removing the impurity such as calcium, magnesium), reverse flotation foam are tailing, are phosphorus concentrate in slot.
In above-mentioned separating technology, it is preferred that in the low-grade phosphate ore, P2O5Content be 14-18%, the content of CaO is
The content of 30-38%, MgO are 4-12%, CaO/P2O5Mass ratio be 2.0-2.6.
In above-mentioned separating technology, it is preferred that the granularity of the control digestion ore pulp is less than 0.5mm, solid matter in ore pulp
Mass concentration be 10-40%.If granularity is too thick, the CaO in one side particle cannot be dissolved out, and lead to digestion not exclusively, separately
On the one hand, it is easy deep gouge in floatation process, causes flotation device operation abnormal, therefore the granularity control for digesting ore pulp is being less than
0.5mm.The mass concentration of solid matter will affect concentrate quality, the rate of recovery, reagent consumption, flotation device processing capacity in ore pulp
Deng therefore, desired ore pulp mass concentration is 10-40% in the present invention.
In above-mentioned separating technology, it is preferred that the reverse flotation is that a reverse flotation or one slightly sweep reverse flotation.
In above-mentioned separating technology, it is preferred that during a reverse flotation, dispersant dosage 300-1200g/t, collecting agent
Dosage is 500-1500g/t, frother dosages 5-40g/t.
In above-mentioned separating technology, it is preferred that during one slightly sweeps reverse flotation, when roughing, dispersant dosage 50-
1000g/t, collector dosage 100-1000g/t, frother dosages 5-40g/t；When scanning, dispersant dosage 0-
400g/t, collector dosage 100-500g/t, frother dosages 0-20g/t.
In above-mentioned separating technology, it is preferred that the dispersing agent is waterglass or calgon, and the collecting agent is sulfonic acid
Class collecting agent, the foaming agent are No. 2 oil (compound advanced alcohol) or MIBC (methyl isobutyl carbinol).
In the present invention, the selection of dispersing agent, collecting agent and frother dosages and type has been allowed for material
Matter (i.e. the property of low-grade phosphate ore) and desired floatation indicators and determination.Dosing is too low or excessively high, is not achieved pre-
Phase target, it is also possible to will cause medicament waste.
In above-mentioned separating technology, it is preferred that in the phosphorus concentrate, P2O5Grade is greater than 24%, and phosphorous recovery is greater than
82.5%, CaO/P2O5Mass ratio is less than 1.7.
Process flow of the invention is calcining-digestion-reverse floatation process, and reverse flotation flowsheet is simple, only a reverse flotation
Or one slightly sweep reverse flotation, and the processing capacity of flotation and more efficient, has many advantages, such as that unit volume processing capacity is big.Separately
Outside, for the property of mid low grade phosphate rock of the present invention, reverse flotation flowsheet is easily achieved specific aim combination, can remove close to granularity
The upper limit does not digest complete CaO particle, strong to adaptability to raw materials.In the present invention, for specific low-grade phosphate ore, calcines and disappear
Phosphorus ore after change is more advantageous to reverse flotation, and calcining, digestion and reverse flotation cooperate, synergistic effect, finally obtained phosphorus concentrate
Middle P2O5Grade is high, and the rate of recovery of phosphorus is high, CaO/P2O5Mass ratio is low.
Compared with the prior art, the advantages of the present invention are as follows:
1, dispersing agent, collecting agent and foaming agent is added in digestion ore pulp in the present invention, make to the property of can choose calcium hydroxide,
Magnesium hydroxide is separated with phosphorus ore, and separative efficiency is high, the P of gained phosphorus concentrate product2O5Grade is greater than 24%, P2O5The rate of recovery is greater than
82%, CaO/P2O5Mass ratio meets JCKPA kiln-process phosphoric acid process requirements less than 1.7.
2, the present invention has many advantages, such as that process flow is simple, treating capacity is big, strong to adaptability to raw material, has a vast market
Prospect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the process flow chart of a reverse flotation of the invention.
Fig. 2 is the process flow chart that the present invention one slightly sweeps reverse flotation.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face, careful description, but the protection scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1:
A kind of phosphorus ore calcining-digestion-reverse flotation separating technology, comprising the following steps:
(1) low-grade phosphate ore P2O5Content is 16.51%, CaO content 34.38%, content of MgO 10.44%, CaO/
P2O5Mass ratio is 2.08.Low-grade phosphate ore is obtained into the quality of solid matter in ore pulp through muck, ore grinding, calcining, digestion process
Concentration is the digestion ore pulp that 20%, grain graininess is less than 0.425mm；
(2) process carries out a reverse flotation to digestion ore pulp as shown in Figure 1, sequentially adds waterglass in digestion ore pulp
1000g/t, sulphonic acids collecting agent HSN 1400g/t and No. 2 oil 31g/t finally can get P2O5The phosphorus essence that grade is 25.57%
Mine, the rate of recovery 84.01%, CaO/P2O5Mass ratio is 1.64, and gained phosphorus concentrate meets JCKPA kiln-process phosphoric acid process requirements.
Embodiment 2:
A kind of phosphorus ore calcining-digestion-reverse flotation separating technology, comprising the following steps:
(1) low-grade phosphate ore P2O5Content is 16.51%, CaO content 34.38%, content of MgO 10.44%, CaO/
P2O5Mass ratio is 2.08.Low-grade phosphate ore is obtained into the quality of solid matter in ore pulp through muck, ore grinding, calcining, digestion process
Concentration is the digestion ore pulp that 20%, grain graininess is less than 0.425mm；
(2) process carries out a reverse flotation to digestion ore pulp as shown in Figure 1, sequentially adds waterglass in digestion ore pulp
500g/t, sulphonic acids collecting agent HSN 500g/t and No. 2 oil 20g/t finally can get P2O5The phosphorus concentrate that grade is 24.30%,
The rate of recovery is 87.40%, CaO/P2O5Mass ratio is 1.70, and gained phosphorus concentrate meets JCKPA kiln-process phosphoric acid process requirements.
Embodiment 3:
A kind of phosphorus ore calcining-digestion-reverse flotation separating technology, comprising the following steps:
(1) low-grade phosphate ore P2O5Content is 15.36%, CaO content 35.81%, content of MgO 10.87%, CaO/
P2O5Mass ratio is 2.33.Low-grade phosphate ore is obtained into the quality of solid matter in ore pulp through muck, ore grinding, calcining, digestion process
Concentration is the digestion ore pulp that 25%, grain graininess is less than 0.15mm；
(2) process carries out one to digestion ore pulp and slightly sweeps reverse flotation as shown in Figure 2, when roughing, in digestion ore pulp successively
Calgon 50g/t, sulphonic acids collecting agent HSN 300g/t and MIBC 10g/t is added；When scanning, sulphonic acids are sequentially added
Collecting agent HSN 200g/t and MIBC 5g/t finally can get P2O5The phosphorus concentrate that grade is 26.77%, the rate of recovery are
82.90%, CaO/P2O5Mass ratio is 1.62, and gained phosphorus concentrate meets JCKPA kiln-process phosphoric acid process requirements.
Embodiment 4:
A kind of phosphorus ore calcining-digestion-reverse flotation separating technology, comprising the following steps:
(1) low-grade phosphate ore P2O5Content is 14.87%, CaO content 36.32%, content of MgO 11.21%, CaO/
P2O5Mass ratio is 2.41.By low-grade phosphate ore through muck, ore grinding, calcining, digestion process obtain ore pulp mass concentration be 35%,
Grain graininess is less than the digestion ore pulp of 0.15mm；
(2) process carries out one to digestion ore pulp and slightly sweeps reverse flotation as shown in Figure 2, when roughing, in digestion ore pulp successively
Calgon 50g/t, sulphonic acids collecting agent HSN 400g/t and MIBC 5g/t is added；When scanning, hexa metaphosphoric acid is sequentially added
Sodium 20g/t, sulphonic acids collecting agent HSN 200g/t and MIBC 10g/t finally can get P2O5The phosphorus essence that grade is 25.83%
Mine, the rate of recovery 82.95%, CaO/P2O5Mass ratio is 1.64, and gained phosphorus concentrate meets JCKPA kiln-process phosphoric acid process requirements.
Embodiment 5:
A kind of phosphorus ore calcining-digestion-reverse flotation separating technology, comprising the following steps:
(1) low-grade phosphate ore P2O5Content is 16.51%, CaO content 34.38%, content of MgO 10.44%, CaO/
P2O5Mass ratio is 2.08.Low-grade phosphate ore is obtained into the quality of solid matter in ore pulp through muck, ore grinding, calcining, digestion process
Concentration is the digestion ore pulp that 20%, grain graininess is less than 0.425mm；
(2) process carries out a reverse flotation to digestion ore pulp as shown in Figure 1, sequentially adds waterglass in digestion ore pulp
1100g/t, sulphonic acids collecting agent HSN 1500g/t and No. 2 oil 35g/t finally can get P2O5The phosphorus essence that grade is 25.52%
Mine, the rate of recovery 83.88%, CaO/P2O5Mass ratio is 1.68, and gained phosphorus concentrate meets JCKPA kiln-process phosphoric acid process requirements.
Comparative example:
A kind of phosphorus ore calcining-digestion-desliming process, comprising the following steps:
(1) low-grade phosphate ore P2O5Content is 16.51%, CaO content 34.38%, content of MgO 10.44%, CaO/
P2O5Mass ratio is 2.08；By low-grade phosphate ore through muck, ore grinding, calcining, digestion process obtain ore pulp mass concentration be 25%,
Grain graininess is less than the digestion ore pulp of 0.15mm；
(2) desliming process, cyclone overflow lip diameter 20mm, sand sinking port diameter are carried out to digestion ore pulp using cyclone
10mm, feed pressure 0.15MPa finally can get P2O5The phosphorus concentrate that grade is 24.69%, the rate of recovery 82.26%,
CaO/P2O5Mass ratio is 1.69, and gained phosphorus concentrate meets JCKPA kiln-process phosphoric acid process requirements.
Embodiment 2 is compared with comparative example, in phosphorus concentrate P2O5Grade, CaO/P2O5In the case that mass ratio is close, the former
Phosphorous recovery be higher by 5 percentage points.Embodiment 3 is compared with comparative example, in situation similar in phosphorous recovery, the former phosphorus essence
Mine P2O5Grade is higher by 2.08 percentage points, CaO/P2O5Mass ratio reduces 0.07.
Claims (8)
1. a kind of phosphorus ore calcining-digestion-reverse flotation separating technology, which comprises the following steps:
(1) low-grade phosphate ore is obtained into digestion ore pulp through calcining, digestion process；
(2) dispersing agent, collecting agent and foaming agent are sequentially added into digestion ore pulp obtained in step (1) and carries out reverse flotation, instead
Flotation froth is tailing, is phosphorus concentrate in slot.
2. separating technology according to claim 1, which is characterized in that in the low-grade phosphate ore, P2O5Content be 14-
The content of 18%, CaO are 30-38%, and the content of MgO is 4-12%, CaO/P2O5Mass ratio be 2.0-2.6.
3. separating technology according to claim 1, which is characterized in that the granularity of the control digestion ore pulp is less than 0.5mm,
The mass concentration of solid matter is 10-40% in ore pulp.
4. separating technology according to claim 1, which is characterized in that the reverse flotation is that a reverse flotation or one slightly sweep
Reverse flotation.
5. separating technology according to claim 4, which is characterized in that during a reverse flotation, dispersant dosage is
300-1200g/t, collector dosage 500-1500g/t, frother dosages 5-40g/t.
6. separating technology according to claim 4, which is characterized in that during one slightly sweeps reverse flotation, when roughing, dispersion
Agent dosage is 50-1000g/t, collector dosage 100-1000g/t, frother dosages 5-40g/t；When scanning, dispersing agent
Dosage is 0-400g/t, collector dosage 100-500g/t, frother dosages 0-20g/t.
7. separating technology according to claim 1 to 6, which is characterized in that the dispersing agent is waterglass or six
Sodium metaphosphate, the collecting agent are sulphonic acids collecting agent, and the foaming agent is No. 2 oil or MIBC.
8. separating technology according to claim 1 to 6, which is characterized in that in the phosphorus concentrate, P2O5Grade is big
In 24%, phosphorous recovery is greater than 82.5%, CaO/P2O5Mass ratio is less than 1.7.
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Citations (6)
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|---|---|---|---|---|
| US5147528A (en) * | 1990-04-12 | 1992-09-15 | Falconbridge Limited | Phosphate beneficiation process |
| CN102600965A (en) * | 2012-03-28 | 2012-07-25 | 瓮福（集团）有限责任公司 | Method for recycling phosphorus from phosphate tailings with high magnesium content |
| CN103569984A (en) * | 2013-11-26 | 2014-02-12 | 武汉工程大学 | Method for comprehensively utilizing reverse-flotation phosphorite tailings |
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| CN106315530A (en) * | 2015-06-30 | 2017-01-11 | 铜仁市万山区盛和矿业有限责任公司 | Method for processing phosphate rock tailings |
| CN106622637A (en) * | 2016-12-27 | 2017-05-10 | 中蓝连海设计研究院 | Process for treating phosphate ores by combining reverse-flotation desilication and acid leaching magnesium removal |
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2018
- 2018-11-29 CN CN201811450479.3A patent/CN109351481B/en active Active
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|---|---|---|---|---|
| US5147528A (en) * | 1990-04-12 | 1992-09-15 | Falconbridge Limited | Phosphate beneficiation process |
| CN102600965A (en) * | 2012-03-28 | 2012-07-25 | 瓮福（集团）有限责任公司 | Method for recycling phosphorus from phosphate tailings with high magnesium content |
| CN103569984A (en) * | 2013-11-26 | 2014-02-12 | 武汉工程大学 | Method for comprehensively utilizing reverse-flotation phosphorite tailings |
| CN104826740A (en) * | 2015-05-07 | 2015-08-12 | 乌鲁木齐金石徽龙矿业有限公司 | Phosphorite flotation process |
| CN106315530A (en) * | 2015-06-30 | 2017-01-11 | 铜仁市万山区盛和矿业有限责任公司 | Method for processing phosphate rock tailings |
| CN106622637A (en) * | 2016-12-27 | 2017-05-10 | 中蓝连海设计研究院 | Process for treating phosphate ores by combining reverse-flotation desilication and acid leaching magnesium removal |
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| 阮耀阳等: "磷矿浮选药剂研究进展", 《武汉工程大学学报》 * |
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