CN104195343A - Method for extracting lead, zinc and copper from fly ash of sintering machine head - Google Patents
Method for extracting lead, zinc and copper from fly ash of sintering machine head Download PDFInfo
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- CN104195343A CN104195343A CN201410398999.XA CN201410398999A CN104195343A CN 104195343 A CN104195343 A CN 104195343A CN 201410398999 A CN201410398999 A CN 201410398999A CN 104195343 A CN104195343 A CN 104195343A
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- copper
- dedusting ash
- machine head
- sintering machine
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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
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Abstract
The invention discloses a method for extracting lead, zinc and copper from fly ash of a sintering machine head. The method comprises the following steps: (1) mixing fly ash and distilled water in a weight ratio of (1:3) to (1:4) to obtain a mixture, and then inputting 4-8% soap water to disperse; (2) placing the mixed liquid on a constant speed stirrer, and stirring for 5-8 minutes at a speed of 150-250r/min; (3) carrying out magnetic separation by a wet process on the stirred mixed liquid slurry, then, filtering filter residues of the mixed liquid, and storing the filtrate; (4) dissolving the filter residues by virtue of 2-4mol/L HCl, wherein the solid liquid ratio of the filter residues and HCl is (1:2) to (1:4); (5) mixing the filtrate in the step (4) and the filtrate in the step (3) and inputting 1-2mol/L Na2S till no black precipitate is generated; and (6) filtering to obtain the precipitate which is a lead, zinc and copper mixture. The method provided by the invention has the characteristics of short process flow, low cost, high extraction ratio of lead, zinc and copper, relatively high extraction purity, and is convenient to realize industrialized application.
Description
Technical field
The present invention relates to metallurgical gas dust purification field, refer to particularly it is a kind of method that sintering machine head end dedusting ash is extracted plumbous zinc-copper.
Background technology
The dust that steel enterprise sintering machine is taken out of in negative pressure down draft sintering process is collected through electric precipitation, is sintering machine head dust removing ash.The plumbous zinc-copper element that contains high level in this dedusting ash.At present, most domestic iron and steel enterprise directly returns to these dust to sintering and uses, and easily causes these elements to sneak in agglomerate, and then enters blast furnace production, affects blast furnace campaign.In addition, in the extraction dedusting ash that Some Universities or enterprise carry out, the large multiple process routes of research of plumbous zinc-copper element is long, and it is too many that leaching process is introduced element, is not easy industrial applications.
Summary of the invention
Object of the present invention is exactly to provide a kind of sintering machine head end dedusting ash to extract the method for plumbous zinc-copper, and technical process is short, and the feature that lower, the plumbous zinc-copper extraction yield of cost is high, DNA purity is relatively high, is convenient to realize industrial applications.
For achieving the above object, sintering machine head end dedusting ash provided by the present invention is extracted the method for plumbous zinc-copper, and it comprises the steps:
(1) dedusting ash and distilled water are mixed to get to solidliquid mixture for 1: 3 in mass ratio～1: 4, then add mass concentration and be 4～8% suds, suds and solidliquid mixture are disperseed for 1: 100 by volume～3: 100;
(2) mixed solution after disperseing in step (1) is placed on constant speed stirrer, by the speed of 150～250r/min, stirs 5～8min;
(3) the mixed solution slurries after stirring are carried out to wet magnetic separation, then cross the filter residue that filters to remove mixed solution, preserve filtrate;
(4) filter residue in step (3) is dissolved with the HCl of 2～4mol/L, the solid-to-liquid ratio of filter residue and HCl is 1: 2～1: 4;
(5) filtrate obtaining after the lysate filtration in step (4) is mixed with the filtrate in step (3), add the Na of 1～2mol/L
2s is until no longer produce black precipitate;
(6) last, filter the throw out obtaining and be plumbous zinc-copper mixture.
As a kind of preferred version, in described step (1), dedusting ash and distilled water mass ratio are 1: 3; The mass concentration of the suds that add is 6～7%.
As another preferred version, in described step (2), the speed of stirrer is 200～250r/min, and churning time is 7～8min.
As another preferred version, in described step (4), the concentration of HCl is 3～4mol/L, and the solid-to-liquid ratio of filter residue and HCl is 1: 3.
As another preferred version, the Na adding in described step (5)
2s concentration is 1mol/L.
The technical problem to be solved in the present invention:
(1) in common dust, extract element rate not high.
(2) in common dust, extract element purity not high.
(3) in common dust, extract element complex process, cost is high.
The present invention mixes dedusting ash with distilled water, add a small amount of dispersion agent, and the hydrophobic substance on dedusting ash surface is disperseed in water, guarantees the abundant stripping of element of wrapping up in dedusting ash.After stirring at low speed certain hour, mixing solutions is carried out to wet magnetic separation, extract the magnetic substance that wherein contains Fe.After filtration, the filter residue containing coke, silicate and part heavy metal basic salt that does not dissolve in water is carried out to acid molten, then carried out filter operation, the filtrate after filtration is mixed with the filtered liquid after magnetic separation, speculates appropriate Na
2s solution, to no longer producing black precipitate, precipitates Pb, Zn, Cu with the form of sulfide, the throw out obtaining is dried to be after filtration and extracted leaded zinc-copper material.
The invention has the advantages that: it is short that method of the present invention has technical process, the feature that lower, the plumbous zinc-copper extraction yield of cost is high, DNA purity is relatively high, is convenient to realize industrial applications.Present method can not only be extracted more than 90% plumbous zinc-copper in dedusting ash, and the plumbous zinc-copper substances content extracting is more than 70%.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment mono-: sintering machine head end dedusting ash of the present invention is extracted the method for k-na salt, and it comprises the steps:
(1) dedusting ash and distilled water are mixed to get to solidliquid mixture in mass ratio at 1: 3, then add mass concentration and be 4% suds, by suds and solidliquid mixture by volume 1:100～3:100 disperse;
(2) mixed solution after disperseing in step (1) is placed on constant speed stirrer, by the speed of 150r/min, stirs 5min;
(3) the mixed solution slurries after stirring are carried out to wet magnetic separation, rear mistake filters to remove the filter residue of mixed solution, preserves filtrate;
(4) filter residue in step (3) is dissolved with the HCl of 2mol/L, filter residue and HCl solid-to-liquid ratio are 1: 2;
(5) filtrate obtaining after the mixed solution filtration in step (4) is mixed with filtrate in step (3), add the Na of 1mol/L
2s is until no longer produce black precipitate;
(6) last, filter the throw out obtaining and be plumbous zinc-copper mixture.
Embodiment bis-: method steps is with embodiment mono-, and difference is: in described step (1), dedusting ash and distilled water mass ratio are 1: 4; The mass concentration of the suds that add is 7%; In step (2), the speed of stirrer is 250r/min, and churning time is 8min; In described (4), the concentration of HCl is 4mol/L, and filter residue and HCl solid-to-liquid ratio are 1: 3; The Na adding in described step (5)
2s concentration is 2mol/L.
Embodiment tri-: method steps is with embodiment mono-, and difference is: in described step (1), dedusting ash and distilled water mass ratio are 1: 3; The mass concentration of the suds that add is 6%; In step (2), the speed of stirrer is 200r/min, and churning time is 8min; In described (4), the concentration of HCl is 3mol/L, and filter residue and HCl solid-to-liquid ratio are 1: 4; The Na adding in described step (5)
2s concentration is 1mol/L.
Embodiment tetra-: method steps is with embodiment mono-, and difference is: in described step (1), dedusting ash and distilled water mass ratio are 1: 3; The mass concentration of the suds that add is 8%; In step (2), the speed of stirrer is 250r/min, and churning time is 7min; In described (4), the concentration of HCl is 3～4mol/L, and filter residue and HCl solid-to-liquid ratio are 1: 3; The Na adding in described step (5)
2s concentration is 1mol/L.
Claims (5)
1. sintering machine head end dedusting ash is extracted a method for plumbous zinc-copper, and it comprises the steps:
(1) dedusting ash and distilled water are mixed to get to solidliquid mixture for 1: 3 in mass ratio～1: 4, then add mass concentration and be 4～8% suds, suds and solidliquid mixture are disperseed for 1: 100 by volume～3: 100;
(2) mixed solution after disperseing in step (1) is placed on constant speed stirrer, by the speed of 150～250r/min, stirs 5～8min;
(3) the mixed solution slurries after stirring are carried out to wet magnetic separation, then cross the filter residue that filters to remove mixed solution, preserve filtrate;
(4) filter residue in step (3) is dissolved with the HCl of 2～4mol/L, the solid-to-liquid ratio of filter residue and HCl is 1: 2～1: 4;
(5) filtrate obtaining after the lysate filtration in step (4) is mixed with the filtrate in step (3), add the Na of 1～2mol/L
2s is until no longer produce black precipitate;
(6) last, filter the throw out obtaining and be plumbous zinc-copper mixture.
2. sintering machine head end dedusting ash according to claim 1 is extracted the method for plumbous zinc-copper, it is characterized in that: in described step (1), dedusting ash and distilled water mass ratio are 1: 3; The mass concentration of the suds that add is 6～7%.
3. sintering machine head end dedusting ash according to claim 1 is extracted the method for plumbous zinc-copper, it is characterized in that: in described step (2), the speed of stirrer is 200～250r/min, and churning time is 7～8min.
4. sintering machine head end dedusting ash according to claim 1 is extracted the method for plumbous zinc-copper, it is characterized in that: in described step (4), the concentration of HCl is 3～4mol/L, and the solid-to-liquid ratio of filter residue and HCl is 1: 3.
5. sintering machine head end dedusting ash according to claim 1 is extracted the method for plumbous zinc-copper, it is characterized in that: the Na adding in described step (5)
2s concentration is 1mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410398999.XA CN104195343A (en) | 2014-08-13 | 2014-08-13 | Method for extracting lead, zinc and copper from fly ash of sintering machine head |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410398999.XA CN104195343A (en) | 2014-08-13 | 2014-08-13 | Method for extracting lead, zinc and copper from fly ash of sintering machine head |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000061426A (en) * | 1998-08-20 | 2000-02-29 | Ebara Corp | Treatment of flying ash from incinerator |
| JP2006298730A (en) * | 2005-04-25 | 2006-11-02 | Hiromitsu Habaguchi | Method of firing incineration ash and sintered compact obtained by the same method |
| CN101428832A (en) * | 2008-11-27 | 2009-05-13 | 莱芜钢铁股份有限公司 | Potassium sulfate extracted from sintering dust separation ash and method for producing the same |
| CN101723713A (en) * | 2009-12-10 | 2010-06-09 | 湖南华菱湘潭钢铁有限公司 | Overall treatment method of steel works sintering dust |
| CN101733193A (en) * | 2009-12-10 | 2010-06-16 | 湖南华菱湘潭钢铁有限公司 | Method for preparing highly dispersed sintered ash suspension |
| CN102618724A (en) * | 2012-04-26 | 2012-08-01 | 大恩(天津)环境技术研发有限公司 | Method for separating and recovering heavy metals from melted garbage burning fly ash |
-
2014
- 2014-08-13 CN CN201410398999.XA patent/CN104195343A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000061426A (en) * | 1998-08-20 | 2000-02-29 | Ebara Corp | Treatment of flying ash from incinerator |
| JP2006298730A (en) * | 2005-04-25 | 2006-11-02 | Hiromitsu Habaguchi | Method of firing incineration ash and sintered compact obtained by the same method |
| CN101428832A (en) * | 2008-11-27 | 2009-05-13 | 莱芜钢铁股份有限公司 | Potassium sulfate extracted from sintering dust separation ash and method for producing the same |
| CN101723713A (en) * | 2009-12-10 | 2010-06-09 | 湖南华菱湘潭钢铁有限公司 | Overall treatment method of steel works sintering dust |
| CN101733193A (en) * | 2009-12-10 | 2010-06-16 | 湖南华菱湘潭钢铁有限公司 | Method for preparing highly dispersed sintered ash suspension |
| CN102618724A (en) * | 2012-04-26 | 2012-08-01 | 大恩(天津)环境技术研发有限公司 | Method for separating and recovering heavy metals from melted garbage burning fly ash |
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Application publication date: 20141210 |