CN103880135A - Treatment method of wastewater generated during phosphorus ore direct and reverse flotation - Google Patents
Treatment method of wastewater generated during phosphorus ore direct and reverse flotation Download PDFInfo
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- CN103880135A CN103880135A CN201410121728.XA CN201410121728A CN103880135A CN 103880135 A CN103880135 A CN 103880135A CN 201410121728 A CN201410121728 A CN 201410121728A CN 103880135 A CN103880135 A CN 103880135A
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Abstract
The invention provides a treatment method of wastewater generated during phosphorus ore direct and reverse flotation. In the phosphorus ore direct and reverse flotation process, phosphoric acid is adopted as a reverse flotation regulator, and the redundant wastewater can be returned to a direct flotation system to be recycled after undergoing one-step treatment by adopting lime. The treatment method specifically comprises the steps of collecting the wastewater from a direct and reverse flotation system; delivering the collected wastewater to an agitation vat, and simultaneously adding lime to the agitation vat to be agitated to react, thus generating a precipitate; delivering the water containing the precipitate to a precipitation tank to be precipitated, and returning the upper clear water to the direct flotation system to be recycled. The wastewater treatment method has the beneficial effects that lime is adopted for one-step treatment; the process flow is simple; the cost is low; the treated wastewater returns to direct flotation, so that the dosages of sodium carbonate and sodium silicate in the direct flotation system can be reduced, the sorting property of direct flotation can be improved and the phosphorus concentrate recovery rate can be increased.
Description
Technical field
The invention belongs to flotation of phosphate rock technical field, particularly relate to the recycling treatment process of the positive and negative flotation waste water of a kind of phosphorus ore.
Background technology
In the positive reverse flotation flowsheet of phosphorus ore, the waste water of direct flotation mine tailing can directly return to direct flotation system and use, and the concentrate waste water of reverse flotation system and mine tailing wastewater can return to reverse flotation system and use.Direct flotation system water amount is larger, the wastewater flow rate deficiency that direct flotation mine tailing returns, need to supplement a part of water, and reverse flotation system water amount is less, but the waste water that reverse flotation system need to be returned is more, has part unnecessary, if this part unnecessary waste water directly returns to direct flotation system and uses, direct flotation is had to larger negative impact, use in order to make the waste water of reverse flotation system can return to direct flotation system, need to process it.At present, the treatment process of the positive and negative flotation waste water of phosphorus ore is mainly that waste water is returned to direct flotation system, before direct flotation collecting agent adds, adding NaOH processes, its defect is: add after NaOH, if Phosphorus From Wastewater acid ion concentration is lower, will residual more calcium ion and magnesium ion in waste water, direct flotation need to consume more sodium carbonate to eliminate the impact of calcium ion, magnesium ion in water, and NaOH cost is higher, thereby increase processing cost.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, and a kind for the treatment of process of the new positive and negative flotation waste water of phosphorus ore is provided, and the method flow process is simple, and process add medicament lime, consumption is few, price is low, cost for wastewater treatment is lower.
It is to realize by following technical scheme that the present invention wants technical solution problem.The present invention is the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore, is characterized in, in the positive reverse floatation process of phosphorus ore, reverse flotation adjusting agent adopts phosphoric acid, after unnecessary waste water adopts lime one step to process in technique, can be back to the utilization of direct flotation system recoveries, concrete treatment step is:
(1) waste water of positive and negative floatation system is collected;
(2) waste water of collecting is delivered to agitation vat, in agitation vat, adds lime to carry out stirring reaction, generate throw out simultaneously;
(3) will contain sedimentary water and be delivered to settling tank precipitation, upper strata clear water can return to the utilization of direct flotation system recoveries.
In the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore of the present invention: described reverse flotation adjusting agent is preferably phosphoric acid, phosphoric acid be thermal phosphoric acid or phosphoric acid by wet process or thermal phosphoric acid and phosphoric acid by wet process the two arbitrarily than mixing acid.
In the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore of the present invention: the time of step (2) stirring reaction is preferably 0.5～6min.
In the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore of the present invention: step (2) lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:(1.1～1.9); More preferably make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:(1.4～1.6).
In the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore of the present invention: step (3) sedimentation time is more preferably greater than 10min.
Principle of the present invention is: in the waste water of the positive reverse flotation of phosphorus ore (ordinary method), contain a large amount of hydrogen ions, calcium ion, magnesium ion and acid ion (being generally sulfate ion and phosphate anion), these ion pair direct flotations have disadvantageous effect, in order to eliminate the impact of these ions, need to add medicament and these ionic reactions, make it to generate water or generate water-fast throw out, hydrogen ion can be removed by adding hydroxide ion generation water, and calcium ion, magnesium ion and acid ion need to be removed by precipitation.Under normal temperature, Ca (OH)
2solubility product constant be 5.5 × 10
-6, Ca
3(PO
4)
2solubility product constant be 2.0 × 10
-29, CaSO
4solubility product constant be 3.16 × 10
-7, CaCO
3solubility product constant be 2.8 × 10
-9, Mg (OH)
2solubility product constant be 1.8 × 10
-11, Mg
3(PO
4)
2.8H
2the solubility product constant of O is 6.31 × 10
-26, MgCO
3solubility product constant be 3.5 × 10
-8, due to CaSO
4with Ca (OH)
2solubility product constant larger, and the two approach, Mg SO
4water-soluble, therefore, in basic solution, not introduce in calcium and magnesium other cationic situation in addition, precipitation is removed the SO in water
4 2-more difficult, due to Ca
3(PO
4)
2,mg
3(PO
4)
2.8H
2the solubility product of O is less, if reverse flotation adjusting agent adopts phosphoric acid, in waste water, just there is abundant phosphate anion, only need in waste water, add appropriate lime, just hydrogen ion, calcium ion, magnesium ion and a large amount of phosphate anion effectively can be removed, and after reverse flotation adjusting agent employing phosphoric acid, can alleviate the serious problem of reverse flotation knot calcium.
Compared with prior art, the inventive method adopts lime single stage method to process the positive and negative flotation waste water of phosphorus ore, has eliminated hydrogen ion, calcium ion, magnesium ion and the phosphate anion disadvantageous effect to phosphorus ore direct flotation in waste water.Wastewater treatment process of the present invention is simple, process to add medicament lime consumption few, price is low, processing cost is lower, and waste water after treatment returns to direct flotation and uses, and can reduce direct flotation sodium carbonate and water glass consumption, improve direct flotation sorting, improve the phosphorus concentrate rate of recovery, and after reverse flotation adjusting agent employing phosphoric acid, can alleviate the serious problem of reverse flotation knot calcium.Cost for wastewater treatment is lower.
Embodiment
Below further describe concrete technical scheme of the present invention, so that those skilled in the art further understands the present invention, and do not form the restriction to its right.
Embodiment 1, the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore, in the positive reverse floatation process of phosphorus ore, reverse flotation adjusting agent adopts phosphoric acid by wet process or thermal phosphoric acid or phosphoric acid by wet process to mix with any proportioning of thermal phosphoric acid, after in technique, unnecessary waste water adopts lime one step to process, can be back to the utilization of direct flotation system recoveries, concrete treatment step is:
(1) waste water of positive and negative floatation system is collected;
(2) waste water of collecting is delivered to agitation vat, adds lime to stir, react in agitation vat, generate throw out, churning time is 0.5 min simultaneously, and lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.1;
(3) will contain sedimentary water and be delivered to settling tank precipitation, sedimentation time is greater than 10min, and upper strata clear water can return to the utilization of direct flotation system recoveries.
Embodiment 2, the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore, in the positive reverse floatation process of phosphorus ore, reverse flotation adjusting agent adopts phosphoric acid by wet process or thermal phosphoric acid or phosphoric acid by wet process to mix with any proportioning of thermal phosphoric acid, after in technique, unnecessary waste water adopts lime one step to process, can be back to the utilization of direct flotation system recoveries, concrete treatment step is:
(1) waste water of positive and negative floatation system is collected;
(2) waste water of collecting is delivered to agitation vat, adds lime to stir, react in agitation vat, generate throw out, churning time is 6min simultaneously, and lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.9;
(3) will contain sedimentary water and be delivered to settling tank precipitation, sedimentation time is greater than 10min, and upper strata clear water can return to the utilization of direct flotation system recoveries.
Embodiment 3, the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore, in the positive reverse floatation process of phosphorus ore, reverse flotation adjusting agent adopts phosphoric acid by wet process or thermal phosphoric acid or phosphoric acid by wet process to mix with any proportioning of thermal phosphoric acid, after in technique, unnecessary waste water adopts lime one step to process, can be back to the utilization of direct flotation system recoveries, concrete treatment step is:
(1) waste water of positive and negative floatation system is collected;
(2) waste water of collecting is delivered to agitation vat, adds lime to stir, react in agitation vat, generate throw out, churning time is 0.5 min simultaneously, and lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.4;
(3) will contain sedimentary water and be delivered to settling tank precipitation, sedimentation time is greater than 10min, and upper strata clear water can return to the utilization of direct flotation system recoveries.
Embodiment 4, the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore, in the positive reverse floatation process of phosphorus ore, reverse flotation adjusting agent adopts phosphoric acid by wet process or thermal phosphoric acid or phosphoric acid by wet process to mix with any proportioning of thermal phosphoric acid, after in technique, unnecessary waste water adopts lime one step to process, can be back to the utilization of direct flotation system recoveries, concrete treatment step is:
(1) waste water of positive and negative floatation system is collected;
(2) waste water of collecting is delivered to agitation vat, adds lime to stir, react in agitation vat, generate throw out, churning time is 6min simultaneously, and lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.6;
(3) will contain sedimentary water and be delivered to settling tank precipitation, sedimentation time is greater than 10min, and upper strata clear water can return to the utilization of direct flotation system recoveries.
Embodiment 5, the treatment process test one of the positive and negative flotation waste water of a kind of phosphorus ore.
The positive and negative flotation waste water of phosphorus ore is processed water quality: pH 5.73 before, Ca
2+150.46mg/L, Mg
2+44.79mg/L, PO
4 3-2001.3mg/L.
Add the positive and negative flotation waste water of lime treatment phosphorus ore, lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.5;
The positive and negative flotation waste water of phosphorus ore is processed water quality: pH 11.97 afterwards, Ca
2+10.45mg/L, Mg
2+0.74mg/L, PO
4 3-20.46mg/L.
Embodiment 6, the treatment process test two of the positive and negative flotation waste water of a kind of phosphorus ore.
The positive and negative flotation waste water of phosphorus ore is processed water quality: pH 5.73 before, Ca
2+150.46mg/L, Mg
2+44.79mg/L, PO
4 3-2001.3mg/L.
Add the positive and negative flotation waste water of lime treatment phosphorus ore, lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.4
The positive and negative flotation waste water of phosphorus ore is processed water quality: pH 11.54 afterwards, Ca
2+4.12mg/L, Mg
2+0.41mg/L, PO
4 3-130.82mg/L.
Embodiment 7, the treatment process test three of the positive and negative flotation waste water of a kind of phosphorus ore.
The positive and negative flotation waste water of phosphorus ore is processed water quality: pH 5.73 before, Ca
2+150.46mg/L, Mg
2+44.79mg/L, PO
4 3-2001.30mg/L.
Add the positive and negative flotation waste water of lime treatment phosphorus ore, lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.6
The positive and negative flotation waste water of phosphorus ore is processed water quality: pH 12.01 afterwards, Ca
2+45.95mg/L, Mg
2+0.22mg/L, PO
4 3-7.11mg/L.
Embodiment 8, the application test of the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore.
Domestic certain phosphorus ore, adopts positive reverse flotation flowsheet, and clear water flow process regime of agent is: direct flotation: sodium carbonate 5.0kg/t, water glass 6.0kg/t, direct flotation collecting agent 3.6kg/t; Reverse flotation: phosphoric acid by wet process 14.0 kg/t, collecting agent in reverse floatation 0.7kg/t.Clear water flow test result is: as raw ore P
2o
5grade is that 20.68%, MgO content is 2.17%, and grinding fineness-200 order content is 85%, can obtain P
2o
5grade is that 30.18%, MgO is 0.57% qualified phosphorus concentrate, P
2o
5the rate of recovery is 83.18%.The positive and negative flotation waste water water quality of this phosphorus ore is: pH 5.87, Ca
2+118.01mg/L, Mg
2+43.25mg/L, PO
4 3-2043.17mg/L.Add the positive and negative flotation waste water of this phosphorus ore of lime treatment, lime consumption is: make PO in reaction system
4 3-with (Ca
2++ Mg
2+) mol ratio is 1:1.53.Water quality after processing is: pH 11.41, Ca
2+2.84mg/L, Mg
2+0.28mg/L, PO
4 3-11.54mg/L.Processed waste water is returned to direct flotation system and is used, and waste water recycling flow process regime of agent is: direct flotation: sodium carbonate 4.0kg/t, water glass 5.0kg/t, direct flotation collecting agent 3.6kg/t; Reverse flotation: phosphoric acid by wet process 9.0 kg/t, collecting agent in reverse floatation 0.7kg/t.Waste water recycling flow test result is: as raw ore P
2o
5grade is that 20.53%, MgO content is 2.19%, and grinding fineness-200 order content is 85%, can obtain P
2o
5grade is that 31.04%, MgO is 0.61% qualified phosphorus concentrate, P
2o
5the rate of recovery is 84.34%.Waste water reclamation after treatment not only can reduce direct flotation sodium carbonate and water glass consumption, and can improve the sorting of direct flotation after utilizing, and improves phosphorus concentrate P
2o
5grade and the rate of recovery.
Claims (6)
1. a treatment process for the positive and negative flotation waste water of phosphorus ore, is characterized in that, in the positive reverse floatation process of phosphorus ore, reverse flotation adjusting agent adopts phosphoric acid, after unnecessary waste water adopts lime one step to process in technique, can be back to the utilization of direct flotation system recoveries, concrete treatment step is:
(1) waste water of positive and negative floatation system is collected;
(2) waste water of collecting is delivered to agitation vat, in agitation vat, adds lime to carry out stirring reaction, generate throw out simultaneously;
(3) will contain sedimentary water and be delivered to settling tank precipitation, upper strata clear water can return to the utilization of direct flotation system recoveries.
2. treatment process according to claim 1, is characterized in that: described reverse flotation adjusting agent is phosphoric acid; Described phosphoric acid is thermal phosphoric acid or phosphoric acid by wet process, or thermal phosphoric acid and phosphoric acid by wet process the two arbitrarily than mixing acid.
3. the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore according to claim 1, is characterized in that: step (2) the stirring reaction time is 0.5～6min.
4. the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore according to claim 1, is characterized in that: in step (2), the consumption of lime is: make Ca in reaction system
2+and Mg
2+the two and PO
4 3-mol ratio be 1.1～1.9:1.
5. the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore according to claim 1, is characterized in that: in step (2), the consumption of lime is: make Ca in reaction system
2+and Mg
2+the two and PO
4 3-mol ratio be 1.4～1.6:1.
6. the treatment process of the positive and negative flotation waste water of a kind of phosphorus ore according to claim 1, is characterized in that: step (3) sedimentation time is greater than 10min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106006893A (en) * | 2016-07-05 | 2016-10-12 | 中蓝连海设计研究院 | Treatment method for soluble phosphate radicals in phosphate rock tailings |
| CN106622673A (en) * | 2016-12-29 | 2017-05-10 | 云南磷化集团有限公司 | Wet-process sludge phosphoric acid used as pH regulator in reverse flotation of phosphorite |
| CN106694234A (en) * | 2016-12-29 | 2017-05-24 | 云南磷化集团有限公司 | Process employing phosphogypsum residue field backwater as pH regulator in reverse flotation of phosphorite |
| CN107698043A (en) * | 2017-09-29 | 2018-02-16 | 南京悠谷新材料科技有限公司 | A kind of preparation method of sewage disposal dirt dispersion agent |
| CN110451690A (en) * | 2019-08-22 | 2019-11-15 | 平顶山华兴浮选工程技术服务有限公司 | A kind of flotation of phosphate rock return water treatment process and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730161A (en) * | 2005-07-30 | 2006-02-08 | 中蓝连海设计研究院 | Collophanite direct flotation and reverse flotation technique |
| CN101397162A (en) * | 2008-11-04 | 2009-04-01 | 武汉工程大学 | Reuse treatment process for direct-reverse flotation waste water of collophane containing silicium and calcium |
| CN102020377A (en) * | 2010-10-15 | 2011-04-20 | 中国海洋石油总公司 | Method for treating collophanite positive and reverse flotation beneficiation wastewater |
| CN102744152A (en) * | 2012-07-06 | 2012-10-24 | 中蓝连海设计研究院 | Reverse/direct flotation technology of collophanite |
| WO2014029932A1 (en) * | 2012-08-20 | 2014-02-27 | Ceca S.A. | Collectors for ore enrichment |
-
2014
- 2014-03-28 CN CN201410121728.XA patent/CN103880135B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730161A (en) * | 2005-07-30 | 2006-02-08 | 中蓝连海设计研究院 | Collophanite direct flotation and reverse flotation technique |
| CN101397162A (en) * | 2008-11-04 | 2009-04-01 | 武汉工程大学 | Reuse treatment process for direct-reverse flotation waste water of collophane containing silicium and calcium |
| CN102020377A (en) * | 2010-10-15 | 2011-04-20 | 中国海洋石油总公司 | Method for treating collophanite positive and reverse flotation beneficiation wastewater |
| CN102744152A (en) * | 2012-07-06 | 2012-10-24 | 中蓝连海设计研究院 | Reverse/direct flotation technology of collophanite |
| WO2014029932A1 (en) * | 2012-08-20 | 2014-02-27 | Ceca S.A. | Collectors for ore enrichment |
Non-Patent Citations (1)
| Title |
|---|
| 罗惠华等: "双碱法处理磷矿选矿工艺废水及循环利用研究", 《中国非金属矿工业导刊》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106006893A (en) * | 2016-07-05 | 2016-10-12 | 中蓝连海设计研究院 | Treatment method for soluble phosphate radicals in phosphate rock tailings |
| CN106622673A (en) * | 2016-12-29 | 2017-05-10 | 云南磷化集团有限公司 | Wet-process sludge phosphoric acid used as pH regulator in reverse flotation of phosphorite |
| CN106694234A (en) * | 2016-12-29 | 2017-05-24 | 云南磷化集团有限公司 | Process employing phosphogypsum residue field backwater as pH regulator in reverse flotation of phosphorite |
| CN107698043A (en) * | 2017-09-29 | 2018-02-16 | 南京悠谷新材料科技有限公司 | A kind of preparation method of sewage disposal dirt dispersion agent |
| CN110451690A (en) * | 2019-08-22 | 2019-11-15 | 平顶山华兴浮选工程技术服务有限公司 | A kind of flotation of phosphate rock return water treatment process and device |
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| CN103880135B (en) | 2015-12-09 |
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