CN105463193B - The method of separating waste, worn wiring board non-ferrous metal mixture - Google Patents

The method of separating waste, worn wiring board non-ferrous metal mixture Download PDF

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CN105463193B
CN105463193B CN201410522973.1A CN201410522973A CN105463193B CN 105463193 B CN105463193 B CN 105463193B CN 201410522973 A CN201410522973 A CN 201410522973A CN 105463193 B CN105463193 B CN 105463193B
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copper
mixture
tin
metal
separated
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CN105463193A (en
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王武生
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Shanghai Peijun Technology Co ltd
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Shanghai Qimou Energy Technology Development Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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Abstract

The present invention relates to the method for separating waste, worn wiring board non-ferrous metal mixture, the method is first by non-ferrous metal mixture by jigging or magnetic fluid separating method, enables aluminum alloy to first separate from mixture;Then lead or tin or terne metal are added in copper and scolding tin mixture, make that the scolding tin in lead or tin or terne metal and mixture all melts and copper is non-fusible, then be separated by filtration;Or lead or tin are added in copper and scolding tin mixture, make that the scolding tin in lead or tin and mixture all melts and copper is non-fusible, form proportion different metal or tin alloy, then pass through the secondary separation that difference of specific gravity carries out metal or tin alloy and copper.The method of the present invention has the advantages that easy to operate, of low cost, pollution-free, separative efficiency is high, good separating effect and is easy to large-scale production.

Description

The method of separating waste, worn wiring board non-ferrous metal mixture
Technical field
The present invention is to be related to the method for separating waste, worn wiring board non-ferrous metal mixture.
Background technology
Now with the continuous improvement of living standards of the people, the amount of waste household appliances is also increasing, the recycling of waste household appliances Technology is also more and more, and one of which method is exactly using the method crushed, is separated and recovered after old circuit board is crushed. After crushing can therefrom isolated resin-oatmeal and iron, nickel, aluminium alloy, copper and scolding tin mixture, by selection by winnowing and magnetic separation, will set Cosmetics, iron, nickel separation, the remaining non-ferrous metal mixture being made of aluminium alloy, scolding tin and copper.But this mixture is difficult at present Directly recycle, just can effectively be recycled after only separating aluminium alloy therein, scolding tin and copper.It is although existing Also there are relevant scolding tin recycling isolation technics, the number of patent application as disclosed in Patent Office of the People's Republic of China 22 days Mays in 2013 in technology For 201110364496.7, it is entitled《The separator of scolding tin recycling》A kind of separator of disclosure of the invention, but should Invention will can only be separated with the scolding tin that component mixes, and can not be separated aluminium alloy and copper from mixture, more Scolding tin and copper can not be separated.The state that aluminium alloy, scolding tin and copper mix is extremely complex, particularly solder powder and copper powder Mix, both ratios and content are again multifarious, can not using such a device due to both proportion relatively Realize separation.Therefore, it is badly in need of a kind of easy to operate, of low cost and environmentally friendly separating waste, worn wiring board non-ferrous metal mixing now The method of thing.
The content of the invention
It is an object of the invention to overcome disadvantages mentioned above, there is provided fast and environmentally friendly point of a kind of good separating effect, separating rate From the method for old circuit board non-ferrous metal mixture.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of method of separating waste, worn wiring board non-ferrous metal mixture, the non-ferrous metal mixture include copper, aluminium Alloy, scolding tin, the method are first by non-ferrous metal mixture by jigging or magnetic fluid separating method, make have coloured gold The aluminium alloy belonged in mixture is first separated from mixture;Because the proportion of aluminium alloy is less than copper and scolding tin, there is than The method of double differences is different, therefore jigging or magnetic fluid separating method can be used to enable aluminum alloy to first separate from mixture;Then Lead or tin or terne metal are added into the mixture of copper and scolding tin, makes the scolding tin in lead or tin or terne metal and mixture All melt and copper is non-fusible, then be separated by filtration.Under many circumstances, copper and scolding tin all pass through the mixture of copper and scolding tin What solder(ing) paste welded together, such as the obtained copper of pulverizing waste wiring board and the mixture of scolding tin, when by lead or tin or slicker solder Alloy is added in copper and scolding tin mixture, and under conditions of heating is melted, lead or tin or terne metal are mixed with copper and scolding tin The terne metal of scolding tin refuse Cheng Xin in thing, so that the scolding tin in copper and scolding tin mixture is separated from copper. Liquid condition is fused into since new terne metal is in, and copper is still solid state, therefore can be separated both by filtering Open.
As an improvement scheme, lead or tin or terne metal and fuse salt are added into the mixture of copper and scolding tin, is made Lead or scolding tin in tin or terne metal and mixture and fuse salt all melts and copper is non-fusible, then be separated by filtration.Due to The fusing point of terne metal could generally be filtered more than 200 degree, and when filtering has the table that part terne metal remains in copper Face, causes separation incomplete.By adding fuse salt, since the proportion of fuse salt is small, float on the surface, on the one hand can play insulation Effect, ensure filtering can be normally carried out;On the other hand, due to the cleaning action of fuse salt, copper surface will can be remained in originally Terne metal clean up, so as to reduce residual quantity of the terne metal on copper surface, improve separating effect.
As further improvement project, the filter cake for making to be separated by filtration is mixed with fuse salt, then filtered again Separation.Since the surface of the copper in the filter cake obtained in being separated by filtration also remains certain terne metal, in the cleaning of fuse salt Under effect, remaining terne metal can be cleaned up, improve separating effect.Certainly, the temperature of fuse salt needs to be higher than filter cake In terne metal fusion temperature.
A kind of method of separating waste, worn wiring board non-ferrous metal mixture, the method are first to lead to non-ferrous metal mixture Jigging or magnetic fluid separating method are crossed, the aluminium alloy in non-ferrous metal mixture is first separated from mixture;So Lead is added in the mixture of backward copper and scolding tin, makes that the scolding tin in lead and mixture all melts and copper is non-fusible, is formed than great In the metal of copper;The secondary separation of metal and copper is carried out by difference of specific gravity again.Due to the proportion of scolding tin and the proportion of copper Closely, the proportion of general scolding tin is 8.8 or so, and the proportion of copper is 8.9, so being difficult to separate.The present invention passes through addition Lead, and the proportion of lead is 11.34, more than the proportion of copper;After lead and melts soldering tin mix, new metal is formed, The proportion of this alloy is more than the proportion of copper, therefore can be separated again by both difference of specific gravity.Further, since lead and weldering The fusing point of tin only has several Baidu, far below the fusing point of copper, so alloy will not be formed with copper.
A kind of method of separating waste, worn wiring board non-ferrous metal mixture, the method are first to lead to non-ferrous metal mixture Jigging or magnetic fluid separating method are crossed, the aluminium alloy in non-ferrous metal mixture is first separated from mixture;So Tin is added in the mixture of backward copper and scolding tin, makes that the scolding tin in tin and mixture all melts and copper is non-fusible, it is small to form proportion In the tin alloy of copper;The secondary separation of tin alloy and copper is carried out by difference of specific gravity again.Due to the proportion of scolding tin and the proportion of copper Closely, the proportion of general scolding tin is 8.8 or so, and the proportion of copper is 8.9, so being difficult to separate.The present invention passes through addition Tin, and the proportion of tin is 7.28 proportions for being less than copper, after tin and melts soldering tin mix, forms new tin alloy, this The proportion of kind alloy is less than the proportion of copper, therefore can be separated again by both difference of specific gravity.Further, since tin and scolding tin Fusing point there was only several Baidu, far below the fusing point of copper, thus will not with copper formed alloy.
Secondary separation of the present invention includes filtering the metal or tin alloy of generation and the mixture of copper, makes Metal or tin alloy carry out initial gross separation with copper, obtain metal or tin alloy and blister copper.Since the fusing point of copper is far above lead Alloy or tin alloy, when metal or tin alloy are fused into liquid condition, copper is still within elemental stage, thus can pass through The mode of filtering carries out initial gross separation.
As an improvement scheme, powdery is made in the blister copper that initial gross separation is obtained, and then passes through jigging or magnetic Fluid sorting method makes the metal powder of blister copper adhesion or tin alloy powder be separated with copper powder.Since copper and metal or tin alloy are all Non-ferrous metal, so blister copper can be stained with certain metal or tin alloy, by the way that blister copper is made powdery, so that will both Become powdering, separated both coherent, form copper powder and the mixture of metal powder or tin alloy powder.Although copper powder with Metal powder or tin alloy powder mix, but pass through jigging or magnetic current there is difference of specific gravity between two kinds of powder Body sorting method can be such that copper powder is separated with metal powder or tin alloy powder.
As another improvement project, the blister copper for making to be separated by filtration is mixed with fuse salt, then filtered again Separation.Since the fusing point of terne metal could generally be filtered more than 200 degree, it is residual that when filtering, has part terne metal The surface of copper is stayed in, causes separation incomplete.The present invention, since the proportion of fuse salt is small, is floated on the surface by adding fuse salt, On the one hand insulation can be played the role of, ensure that filtering can be normally carried out;On the other hand, due to the cleaning action of fuse salt, can incite somebody to action The terne metal for originally remaining in copper surface cleans up, so as to reduce residual quantity of the terne metal on copper surface, improves separation Effect.Certainly, the temperature of fuse salt needs the fusion temperature for the metal or tin alloy being higher than in blister copper.
As further improvement project, the secondary separation is included to the metal or tin alloy of generation and the mixing of copper Powdery is first made in thing, then metal powder or tin alloy powder is separated with copper powder by jigging or magnetic fluid separating method.
As further improvement project, metal or the difference of specific gravity of tin alloy powder and copper powder is set to be more than 0.3.Because of difference in specific gravity It is different more big more can be easily separated, but excessive difference of specific gravity, be unavoidably added into excessive lead or tin, this can increase follow-up metal or The mask work amount of tin alloy.
Compared with prior art, the present invention has the advantages that:
1) it is environmentally friendly:Produced in whole separation process without waste water,waste gas and industrial residue;
2) cost is low:Any chemicals need not be added in separation process;
3) yield is high:Present invention process is simple, is easy to large-scale production.
Brief description of the drawings
Fig. 1 is a kind of method flow diagram for separating waste, worn wiring board non-ferrous metal mixture that embodiment 1 provides;
Fig. 2 is a kind of method flow diagram for separating waste, worn wiring board non-ferrous metal mixture that embodiment 2 provides;
Fig. 3 is a kind of method flow diagram for separating waste, worn wiring board non-ferrous metal mixture that embodiment 3 provides;
Fig. 4 is a kind of method flow diagram for separating waste, worn wiring board non-ferrous metal mixture that embodiment 4 provides.
Embodiment
Technical scheme is further elaborated with reference to embodiment and attached drawing:
Embodiment 1
Referring to the drawings shown in 1, a kind of method of separating waste, worn wiring board non-ferrous metal mixture provided in this embodiment is such as Under:It will first make from the obtained non-ferrous metal mixture of pulverizing waste wiring board by jigging or magnetic fluid separating method Aluminum alloy granule in non-ferrous metal mixture is first separated from mixture;Because the proportion of aluminium alloy is less than copper and weldering Tin, there is difference of specific gravity, therefore can use jigging or magnetic fluid separating method to enable aluminum alloy to first divide from mixture Separate out and;Then lead or tin or terne metal are added in copper and scolding tin mixture, progress is melt-blended, makes lead or tin or lead Scolding tin in tin alloy and mixture all melts and copper is non-fusible, then is separated by filtration, and obtained filtrate is the new lead to be formed Tin alloy liquation, obtained filter cake have the metallic copper of a certain amount of new terne metal for remained on surface;The filter cake made and melting Salt mixes, and then carries out refiltering separation, obtained filtrate is fuse salt and terne metal liquation, and obtained filter cake is as pure Copper, because under the cleaning action of fuse salt, can clean up the remaining terne metal of copper surface.Certainly, fuse salt Temperature need be higher than filter cake in terne metal fusion temperature.Since the proportion of fuse salt is small, float on the surface, thus it is separable Go out the terne metal in filtrate;Isolated terne metal can both be recycled as the additive of next step, can also Thick tin and lead bullion are obtained by vacuum distillation, carrying out electrorefining to thick tin obtains refined tin product, and electrorefining is carried out to lead bullion Obtain lead bullion product;Obtained thick tin and lead bullion can also be recycled as the additive of next step.
Embodiment 2
Referring to the drawings shown in 2, a kind of method of separating waste, worn wiring board non-ferrous metal mixture provided in this embodiment is such as Under:It will first make from the obtained non-ferrous metal mixture of pulverizing waste wiring board by jigging or magnetic fluid separating method Aluminum alloy granule in non-ferrous metal mixture is first separated from mixture;Because the proportion of aluminium alloy is less than copper and weldering Tin, there is difference of specific gravity, therefore can use jigging or magnetic fluid separating method to enable aluminum alloy to first divide from mixture Separate out and;Then lead or tin or terne metal and fuse salt are added in copper and scolding tin mixture, progress is melt-blended, makes lead Or tin or scolding tin in terne metal and mixture and fuse salt all melts and copper is non-fusible, then be separated by filtration, obtained Filtrate is the new terne metal liquation to be formed, and obtained filter cake is pure copper;Because the proportion of fuse salt is small, float on the surface, On the one hand insulation can be played the role of, ensure that filtering can be normally carried out;On the other hand, due to the cleaning action of fuse salt, can incite somebody to action The terne metal for originally remaining in copper surface cleans up, so as to obtain pure copper.Certainly, the temperature of fuse salt is needed higher than filter The fusion temperature of terne metal in cake.Isolated new terne metal liquation can both be circulated as the additive of next step Utilize, can also by vacuum distillation obtain thick tin and lead bullion, to thick tin carry out electrorefining obtain refined tin product, to lead bullion into Row electrorefining obtains lead bullion product;Obtained thick tin and lead bullion can also be recycled as the additive of next step.
Embodiment 3
Referring to the drawings shown in 3, a kind of method of separating waste, worn wiring board non-ferrous metal mixture provided in this embodiment is such as Under:It will first make from the obtained non-ferrous metal mixture of pulverizing waste wiring board by jigging or magnetic fluid separating method Aluminum alloy granule in non-ferrous metal mixture is first separated from mixture;Because the proportion of aluminium alloy is less than copper and weldering Tin, there is difference of specific gravity, therefore can use jigging or magnetic fluid separating method to enable aluminum alloy to first divide from mixture Separate out and;Then lead is added into the mixture of copper and scolding tin, progress is melt-blended, the scolding tin in lead and mixture is all melted And copper is non-fusible, forms the metal that proportion is more than copper, then separated, separated method can use filtering, certainly due to The proportion of copper is less than metal, directly can also pull blister copper out from above, blister copper and metal are obtained after separation.To blister copper into Row ball mill grinding, then carries out jigging sorting, obtains copper powder from upper strata, metal is obtained from below, and electrolysis essence is carried out to copper powder Refining, obtains refined copper product.Obtained metal is evaporated in vacuo, obtains thick tin and lead bullion.Electrorefining is carried out to thick tin Obtain refined tin product.A gained lead bullion part can be used for the additive of next step to recycle, to reduce production cost;Another portion Divide and carry out electrorefining, obtain lead bullion product.
Embodiment 4
Referring to the drawings shown in 4, a kind of method of separating waste, worn wiring board non-ferrous metal mixture provided in this embodiment is such as Under:It will first make from the obtained non-ferrous metal mixture of pulverizing waste wiring board by jigging or magnetic fluid separating method Aluminum alloy granule in non-ferrous metal mixture is first separated from mixture;Because the proportion of aluminium alloy is less than copper and weldering Tin, there is difference of specific gravity, therefore can use jigging or magnetic fluid separating method to enable aluminum alloy to first divide from mixture Separate out and;Then tin is added into the mixture of copper and scolding tin, progress is melt-blended, the scolding tin in tin and mixture is all melted And copper is non-fusible, the tin alloy that proportion is less than copper is formed, is then separated, separated method can use filtering, filter The filter cake arrived is blister copper, and filtrate is tin alloy liquation.Ball mill grinding is carried out to blister copper, jigging sorting is then carried out, is obtained from upper strata To tin alloy, copper powder is obtained from below, electrorefining is carried out to copper powder, obtains refined copper product.Tin alloy is evaporated in vacuo, Obtain thick tin and lead bullion.Electrorefining is carried out to lead bullion and obtains lead bullion product.The thick tin part of gained can be used for adding for next step Feeding cycle utilizes, to reduce production cost;Another part carries out electrorefining, obtains refined tin product.
Finally be necessary described herein be:Above example is served only for making technical scheme further detailed Ground explanation, it is impossible to be interpreted as limiting the scope of the invention, those skilled in the art's the above according to the present invention Some the nonessential modifications and adaptations made belong to protection scope of the present invention.

Claims (10)

1. a kind of method of separating waste, worn wiring board non-ferrous metal mixture, the non-ferrous metal mixture includes copper, aluminium closes Gold, scolding tin, it is characterized in that:The method is that non-ferrous metal mixture first is made non-ferrous metal mixture by jigging In aluminium alloy first separated from mixture;Then lead or tin or terne metal are added into the mixture of copper and scolding tin, Make that the scolding tin in lead or tin or terne metal and mixture all melts and copper is non-fusible, then be separated by filtration.
2. according to the method described in claim 1, it is characterized in that:Lead or tin are added into the mixture of copper and scolding tin or slicker solder closes Gold and fuse salt, make the scolding tin in lead or tin or terne metal and mixture and fuse salt all melts and copper is non-fusible, then carry out It is separated by filtration.
3. method as claimed in claim 1 or 2, it is characterized in that:The filter cake for making to be separated by filtration is mixed with fuse salt, then It is separated by filtration again;Wherein:The temperature of fuse salt is higher than the fusing of the metal or tin alloy or terne metal in filter cake Temperature.
4. a kind of method of separating waste, worn wiring board non-ferrous metal mixture, the non-ferrous metal mixture includes copper, aluminium closes Gold, scolding tin, it is characterized in that:The method is that non-ferrous metal mixture first is made non-ferrous metal mixture by jigging In aluminium alloy first separated from mixture;Then lead is added into the mixture of copper and scolding tin, made in lead and mixture Scolding tin all melt and copper is non-fusible, form the metal that proportion is more than copper, then metal and copper are carried out by difference of specific gravity Secondary separation.
5. a kind of method of separating waste, worn wiring board non-ferrous metal mixture, the non-ferrous metal mixture includes copper, aluminium closes Gold, scolding tin, it is characterized in that:The method is that non-ferrous metal mixture first is made non-ferrous metal mixture by jigging In aluminium alloy first separated from mixture;Then tin is added into the mixture of copper and scolding tin, made in tin and mixture Scolding tin all melt and copper is non-fusible, form the tin alloy that proportion is less than copper, then tin alloy and copper are carried out by difference of specific gravity Secondary separation.
6. method according to claim 4 or 5, it is characterized in that:The secondary separation include to the metal of generation or The mixture of tin alloy and copper is filtered, and metal or tin alloy is carried out initial gross separation with copper, obtains metal or tin closes Gold and blister copper.
7. according to the method described in claim 6, it is characterized in that:Powdery is made in the blister copper that initial gross separation is obtained, and then passes through Jigging or magnetic fluid separating method make the metal powder of blister copper adhesion or tin alloy powder be separated with copper powder.
8. according to the method described in claim 6, it is characterized in that:The blister copper for making to be separated by filtration is mixed with fuse salt, then It is separated by filtration again;Wherein:The temperature of fuse salt is higher than the fusion temperature of the metal or tin alloy in blister copper.
9. method according to claim 4 or 5, it is characterized in that:The secondary separation include to the metal of generation or Powdery is first made in the mixture of tin alloy and copper, then closes metal powder or tin by jigging or magnetic fluid separating method Bronze is separated with copper powder.
10. method according to claim 4 or 5, it is characterized in that:The difference of specific gravity is more than 0.3.
CN201410522973.1A 2014-10-06 2014-10-06 The method of separating waste, worn wiring board non-ferrous metal mixture Expired - Fee Related CN105463193B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101623698A (en) * 2009-08-13 2010-01-13 中南大学 Method for synthetically recycling waste printed circuit board
CN102055045A (en) * 2010-12-10 2011-05-11 尚诚德 Energy-saving, environmental-protection and loss-reduction method for recovering and processing waste lead-acid storage battery

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101333600A (en) * 2007-06-28 2008-12-31 上海奇谋能源技术开发有限公司 Process for recovering copper in waste and old circuit board by sand-blast process
JP2009155678A (en) * 2007-12-25 2009-07-16 Mitsubishi Materials Corp Method for recovering noble metal, and recovered noble metal
CN101519791A (en) * 2008-02-25 2009-09-02 上海奇谋能源技术开发有限公司 Method for directly recovering waste circuit board copper by utilizing electrolysis process
CN202087394U (en) * 2010-12-30 2011-12-28 金易通科技(北京)有限公司 Jigging machine air valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101623698A (en) * 2009-08-13 2010-01-13 中南大学 Method for synthetically recycling waste printed circuit board
CN102055045A (en) * 2010-12-10 2011-05-11 尚诚德 Energy-saving, environmental-protection and loss-reduction method for recovering and processing waste lead-acid storage battery

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