CN102851486A - Pyrite cinder treatment method - Google Patents
Pyrite cinder treatment method Download PDFInfo
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- CN102851486A CN102851486A CN2012102926975A CN201210292697A CN102851486A CN 102851486 A CN102851486 A CN 102851486A CN 2012102926975 A CN2012102926975 A CN 2012102926975A CN 201210292697 A CN201210292697 A CN 201210292697A CN 102851486 A CN102851486 A CN 102851486A
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- pyrite cinder
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- pyrite
- fluorine
- hydrofluoric acid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a pyrite cinder treatment method which comprises the following steps: mixing pyrite cinder and hydrofluoric acid of which the content is 5-10% according to 1g:3-10mL, and then adding into a reaction tank; reacting at normal temperature for 1-4 hours; and separating out the solid content in the mixture after reaction. When the iron content in the pyrite cinder can not meet the iron making requirement, the reaction of hydrofluoric acid and silicon dioxide can effectively reduce the silicon content in the pyrite cinder, so that the beneficiation and conglomeration calcining method may be not used any more, thereby simplifying the pyrite cinder treatment process and reducing the production cost.
Description
Technical field
The present invention relates to a kind for the treatment of process to pyrite cinder, especially a kind of fluorine recovery washing water that produce in the production process of phosphoric acid that utilize are the treatment process of raw material to pyrite cinder.
Background technology
Pyrite cinder is to adopt sulfurous iron ore or sulfur-bearing tailings as a kind of waste residue of discharging in the raw material production sulfuric acid process.Be a kind of important chemical industry intermediate product, main component is ferric oxide and silicon-dioxide, mainly as ironmaking, steel-making and cement ingredient.In recent years, along with the development of sulfuric acid industry, the requirement of sulfurous iron ore also there is increase, the sulfurous iron ore that some sulfur-bearings are lower also is used as the raw material of gas washing in SA production, so the ferrous grade in the slag can't be directly used in ironmaking also in corresponding decline, thereby can not get desirable economical effectiveness.Therefore, take to improve its iron grade before being used for ironmaking, the pre-treatment measure that reduces detrimental impurity content is necessary, could provide acceptable material for blast furnace ironmaking like this.Ore dressing and agglomeration roasting to the pretreated major measure of slag.The technique of ore dressing and agglomeration roasting is comparatively complicated, and facility investment is larger, and cost is higher.
It is the waste water that the fluorine-containing extraction tail gas of washing produces in production process of phosphoric acid that fluorine reclaims washing water.Be a kind of pending waste water in phophatic fertilizer production process, general fluorine content is 5 ~ 10%, generally is used for doing silicofluoride, but it is large and be difficult for processing to produce the diluted acid amount.
Summary of the invention
In order to overcome above-mentioned technical disadvantages, the purpose of this invention is to provide a kind of fluorine recovery washing water that produce in the production process of phosphoric acid that utilize and be the treatment process of raw material to pyrite cinder, therefore simplified the treatment process to pyrite cinder, reduced production cost.
For achieving the above object, the technical scheme that the present invention takes is: the steps include: pyrite cinder and content to be that the hydrofluoric acid of 5-10% is put in the reactive tank after mixed in the ratio of 1g:3 ~ 10mL, in normal temperature, carry out 1-4 hour reaction, the solids separation in the reacted mixture out.Solids is pyrite cinder just, and isolated waste liquid is back to and is used further to process pyrite cinder after fluorine reclaims washing system and the new washes that produces mixes.
Because having designed content is the hydrofluoric acid of 5-10%, when the iron-holder in the pyrite cinder does not reach requiring of ironmaking, reaction by hydrofluoric acid and silicon-dioxide, can effectively reduce the silicone content in the pyrite cinder, do not re-use the method for ore dressing and agglomeration roasting, therefore simplify the treatment process to pyrite cinder, reduced production cost.
The present invention has designed, and content is that the hydrofluoric acid of 5-10% is set to the fluorine recovery washing water that vent gas washing system produces in the production process of phosphoric acid.
The present invention has designed, and it is the waste residue that obtains behind the sulfurous iron ore of 25-30% or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
Embodiment
Below in conjunction with embodiment, the present invention is further described, following examples are intended to illustrate the present invention rather than limitation of the invention further.First embodiment of the present invention the steps include: that in the ratio of 1g:3mL be that 5% hydrofluoric acid is put in the reactive tank after mixed to pyrite cinder and content, carries out 4 hours reaction in normal temperature, and reacted mixture is passed through the filter filtering separation.Filter cake is exactly treated pyrite cinder, and isolated waste liquid is back to and is used further to process pyrite cinder after fluorine reclaims washing system and the new washes that produces mixes.
In the present embodiment, content is that 5% hydrofluoric acid is set to the fluorine that vent gas washing system produces in the production process of phosphoric acid and reclaims washing water.
In the present embodiment, pyrite cinder is the pyrite-based sulfuric acid production waste residue, refers to that it is the waste residue that obtains behind 25% sulfurous iron ore or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
The 10 g pyrite cinders that take by weighing, join fluorine according to technical solution of the present invention and reclaim fully reaction in the washing water, carry out three groups of tests, after the filtration, the pyrite cinder after obtaining processing is produced in oven dry, through chemical examination, the following table of iron grade data of pyrite cinder:
| Pyrite cinder (g) | Fluorine reclaims washing water (ml) | Slag weight (g) after the reaction | Reaction times (h) | Iron level after the reaction | Iron-holder increases |
| 10 | 30 | 9.28 | 3 | 64.12% | 4.58% |
| 10 | 50 | 9.16 | 3 | 64.94% | 5.40% |
| 10 | 100 | 9.07 | 3 | 65.56% | 6.02% |
Upper table shows, aforesaid method can make the product potential energy of iron in the slag improve more than 4 percentage points, and the iron grade of pyrite cinder is brought up to more than 64% by original 59.54%, has reached the requirement of ironmaking to iron ore.Through after reacting with pyrite cinder, the waste liquid that obtains is through chemical examination simultaneously, and its fluohydric acid content is not higher than 1%.
Fluorine in the production process of phosphoric acid reclaims washing water, owing to contain hydrofluoric acid, when discharging, can produce pollution to environment, it is also higher that fluorine in the production process of phosphoric acid is reclaimed other treatment process cost of washing water, and oneself lists in the processing of the fluorine recovery washing water that vent gas washing system produces in the production process of phosphoric acid in the city-level scientific research project, in this scientific research project is carried out, various treatment unit have been used, but effect is bad, after reacting with pyrite cinder, has improved treatment effect.
The fluorine of the 100ml that gets is reclaimed washing water, add pyrite cinder according to technical solution of the present invention and fully react, carry out three groups of tests, through chemical examination, the fluorine after the processing reclaims data such as the following table of the fluorine content of washing water:
| Pyrite cinder (g) | Fluorine reclaims washing water (ml) | Slag weight (g) after the reaction | Reaction times (h) | Fluorine content |
| 10 | 100 | 9.07 | 3 | 1% |
| 20 | 100 | 18.31 | 3 | 0.8% |
| 30 | 100 | 27.80 | 3 | 0.7% |
Upper table shows that the fluorine content that fluorine reclaims in the washing water can be reduced to 1% by 5-10%, can solve the recycling problem of the fluorine recovery washing water in the production process of phosphoric acid.
Second embodiment of the present invention, the steps include: that in the ratio of 1g:10mL be that 10% hydrofluoric acid is put in the reactive tank after mixed to pyrite cinder and content, in normal temperature, carry out 1 hour reaction, reacted mixture is passed through the filter filtering separation.Content is that 10% hydrofluoric acid is set to the fluorine that vent gas washing system produces in the production process of phosphoric acid and reclaims washing water.Pyrite cinder is the pyrite-based sulfuric acid production waste residue, refers to that it is the waste residue that obtains behind 30% sulfurous iron ore or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
The 3rd embodiment of the present invention, the steps include: that in the ratio of 1g:6.5mL be that 7.5% hydrofluoric acid is put in the reactive tank after mixed to pyrite cinder and content, in normal temperature, carry out 2.5 hours reaction, reacted mixture is passed through the filter filtering separation.Content is that 7.5% hydrofluoric acid is set to the fluorine that vent gas washing system produces in the production process of phosphoric acid and reclaims washing water.Pyrite cinder is the pyrite-based sulfuric acid production waste residue, refers to that it is the waste residue that obtains behind 27.5% sulfurous iron ore or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
The 4th embodiment of the present invention, the steps include: that in the ratio of 1g:8.5mL be that 8.5% hydrofluoric acid is put in the reactive tank after mixed to pyrite cinder and content, in normal temperature, carry out 3.5 hours reaction, reacted mixture is passed through the filter filtering separation.Content is that 8.5% hydrofluoric acid is set to the fluorine that vent gas washing system produces in the production process of phosphoric acid and reclaims washing water.Pyrite cinder is the pyrite-based sulfuric acid production waste residue, refers to that it is the waste residue that obtains behind 28.5% sulfurous iron ore or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
The 5th embodiment of the present invention, the steps include: that in the ratio of 1g:3.8mL be that 5.5% hydrofluoric acid is put in the reactive tank after mixed to pyrite cinder and content, in normal temperature, carry out 1.5 hours reaction, reacted mixture is passed through the filter filtering separation.Content is that 5.5% hydrofluoric acid is set to the fluorine that vent gas washing system produces in the production process of phosphoric acid and reclaims washing water.Pyrite cinder is the pyrite-based sulfuric acid production waste residue, refers to that it is the waste residue that obtains behind 28% sulfurous iron ore or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
The 6th embodiment of the present invention, the steps include: that in the ratio of 1g:7.50mL be that 7.8% hydrofluoric acid is put in the reactive tank after mixed to pyrite cinder and content, in normal temperature, carry out 2.5 hours reaction, reacted mixture is passed through the filter filtering separation.Content is that 7.8% hydrofluoric acid is set to the fluorine that vent gas washing system produces in the production process of phosphoric acid and reclaims washing water.Pyrite cinder is the pyrite-based sulfuric acid production waste residue, refers to that it is the waste residue that obtains behind 27.5% sulfurous iron ore or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
The present invention has lower characteristics:
1, because to have designed content be the hydrofluoric acid of 5-10%, when the iron-holder in the pyrite cinder does not reach requiring of ironmaking, reaction by hydrofluoric acid and silicon-dioxide, can effectively reduce the silicone content in the pyrite cinder, do not re-use the method for ore dressing and agglomeration roasting, therefore simplify the treatment process to pyrite cinder, reduced production cost.
2, because the fluorine recovery washing water of fluorine content as 5-10% have been used in design, can effectively reduce the silicone content in the pyrite cinder, not re-use the method for ore dressing and agglomeration roasting, therefore simplify the treatment process to pyrite cinder, reduce production cost.
3, process pyrite cinder because design has used fluorine to reclaim washing water, the waste liquid fluorine content that obtains is down to 1%, and then be back to and be used further to process pyrite cinder after fluorine reclaims washing system and the washes of new generation mixes, avoid fluorine is reclaimed the environmental protection investments processing cost of washing water, reduced environmental pollution.
4, reclaim washing water as process water owing to designed the use fluorine, reduced the investment of flotation agent and equipment, therefore reduced production cost.
5, reclaim washing water owing to designed the use fluorine, the filtration rear filtrate returns washing system and recycles, and has reduced water consumption, has avoided the waste to water resources, has reduced environmental pollution.
In the treatment process technical field to pyrite cinder; The steps include: pyrite cinder and content to be that the hydrofluoric acid of 5-10% is put in the reactive tank after mixed in the ratio of 1g:3 ~ 10mL every including; in normal temperature, carry out 1-4 hour reaction, the technology contents out of the solids separation in the reacted mixture all in protection scope of the present invention.
Claims (3)
1. treatment process to pyrite cinder; It is characterized in that: the steps include: pyrite cinder and content to be that the hydrofluoric acid of 5-10% is put in the reactive tank after mixed in the ratio of 1g:3 ~ 10mL, in normal temperature, carry out 1-4 hour reaction, the solids separation in the reacted mixture out.
2. the treatment process to pyrite cinder according to claim 1; It is characterized in that: content is that the hydrofluoric acid of 5-10% is set to the fluorine recovery washing water that vent gas washing system produces in the production process of phosphoric acid.
3. the treatment process to pyrite cinder according to claim 1; It is characterized in that: it is the waste residue that obtains behind the sulfurous iron ore of 25-30% or the sulfur-bearing tailings extracting sulfuric acid that pyrite cinder is set to sulphur content.
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| CN2012102926975A CN102851486A (en) | 2012-08-17 | 2012-08-17 | Pyrite cinder treatment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384169A (en) * | 2014-09-22 | 2015-03-04 | 耿兆翔 | Pyrite cinder separation and recovery method |
| CN110002421A (en) * | 2019-05-17 | 2019-07-12 | 中南大学 | A method of battery-grade iron phosphate is prepared using sulfate slag |
| CN110117720A (en) * | 2019-05-17 | 2019-08-13 | 中南大学 | A kind of method of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal |
| CN110117721A (en) * | 2019-05-17 | 2019-08-13 | 中南大学 | A kind of method that valuable metal is extracted in sulfate slag phosphoric acid leaching-extraction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502709A (en) * | 2002-11-20 | 2004-06-09 | 青岛建筑工程学院 | Technology for treating calcined pyrite by chemical submersion washing method |
| CN1718779A (en) * | 2005-07-07 | 2006-01-11 | 东北大学 | Preparation method of super iron concentrate |
| CN101376922A (en) * | 2008-09-25 | 2009-03-04 | 中国科学院青海盐湖研究所 | Extraction of superpure concentrate of magnetite and preparation thereof |
| CN102534187A (en) * | 2011-12-12 | 2012-07-04 | 师兆忠 | Method for treating pyrite cinder by combining acidic leaching with alkaline dissolving |
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2012
- 2012-08-17 CN CN2012102926975A patent/CN102851486A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502709A (en) * | 2002-11-20 | 2004-06-09 | 青岛建筑工程学院 | Technology for treating calcined pyrite by chemical submersion washing method |
| CN1718779A (en) * | 2005-07-07 | 2006-01-11 | 东北大学 | Preparation method of super iron concentrate |
| CN101376922A (en) * | 2008-09-25 | 2009-03-04 | 中国科学院青海盐湖研究所 | Extraction of superpure concentrate of magnetite and preparation thereof |
| CN102534187A (en) * | 2011-12-12 | 2012-07-04 | 师兆忠 | Method for treating pyrite cinder by combining acidic leaching with alkaline dissolving |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384169A (en) * | 2014-09-22 | 2015-03-04 | 耿兆翔 | Pyrite cinder separation and recovery method |
| CN110002421A (en) * | 2019-05-17 | 2019-07-12 | 中南大学 | A method of battery-grade iron phosphate is prepared using sulfate slag |
| CN110117720A (en) * | 2019-05-17 | 2019-08-13 | 中南大学 | A kind of method of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal |
| CN110117721A (en) * | 2019-05-17 | 2019-08-13 | 中南大学 | A kind of method that valuable metal is extracted in sulfate slag phosphoric acid leaching-extraction |
| CN110117720B (en) * | 2019-05-17 | 2020-05-22 | 中南大学 | Method for comprehensively extracting valuable metals from sulfate slag through phosphorylation roasting, leaching and extraction |
| CN110002421B (en) * | 2019-05-17 | 2020-06-09 | 中南大学 | Method for preparing battery-grade iron phosphate by using sulfuric acid residues |
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Application publication date: 20130102 |