CN102086490B - Method for separating tin slag - Google Patents
Method for separating tin slag Download PDFInfo
- Publication number
- CN102086490B CN102086490B CN200910253537A CN200910253537A CN102086490B CN 102086490 B CN102086490 B CN 102086490B CN 200910253537 A CN200910253537 A CN 200910253537A CN 200910253537 A CN200910253537 A CN 200910253537A CN 102086490 B CN102086490 B CN 102086490B
- Authority
- CN
- China
- Prior art keywords
- tin
- scruff
- ash
- separation
- molten
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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 discloses a method for separating tin slag, which is applied to a manufacturing process for soldering tin on a circuit board in a tin bath loaded with molten tin. The method comprises the following steps of: collecting and accumulating the tin slag produced by the tin soldering manufacturing process; grinding the tin slag into tin ash in the tin bath so that partial tin ingredients in the tin ash are molten into the molten tin again; and fishing and recovering the tin ash which is not dissolved in the molten tin. Compared with the tin waste caused by the conventional direct fishing of the tin slag with high tin content, the method solves the problems of tin waste, overhigh production cost and the like in the prior art by collecting and accumulating the tin slag, grinding the tin slag into the tin ash in the tin bath, and fishing and recovering the tin ash which is not dissolved in the molten tin.
Description
Technical field
The present invention relates to a kind of method of separating scruff, particularly relate to a kind of method that is applied to the separation scruff in the circuit board soldering tin ME.
Background technology
In the ME of printed substrate (PCB), the welding process of circuit card is an extremely important link, and it is determining the quality of a circuit card quality, is mostly to accomplish through wave soldering automatic tin soldering stove to the welding of printed substrate in the prior art.
Said wave soldering automatic tin soldering stove mainly by travelling belt, soldering flux add district, preheating zone, and molten tin bath form.The travelling belt main application is that circuit card is sent into wave soldering automatic tin soldering stove, adds district, preheating zone, molten tin bath etc. through soldering flux on the way.Whether soldering flux adds the district mainly is made up of infrared inductor and nozzle, utilize the infrared inductor induction to have circuit card to get into, and measure the length of circuit card.Soldering flux then be in order on the face of weld of circuit card to form protective membrane.The preheating zone is in order to the activity of enough temperature increase soldering flux to be provided, so that form good solder joint.Be provided with heat-generating pipe and tin pump in the molten tin bath, the scolder that melts in the molten tin bath (tin liquor after the tin fusion) can upwards spray the waveform that forms a protrusion.In the welding process, with applying solder flux on the circuit card that is inserted with element in advance.Through after the preheating,, thereby make circuit card contact crest welded top element and board pads (weld pad) again through the formed crest of scolder by fusing.
In the wave soldering production process of reality; After tin in the molten tin bath melts; The high temperature tin on surface can directly contact with air; Especially the tin of molten tin bath spout constantly rolls and touches directly with air and material thereof that at this moment can to produce some residues be scruff (being the oxide compound of tin), at this time just needs the staff timely the scruff that floats over the tin liquor surface to be cleared up, otherwise; The scolding tin that falls after rise from the formed crest summit of scolder drops on the scruff surface, is prone to make tin to flow to that molten tin bath had not only been wasted outward but also dangerous owing to present half curdled appearance.Therefore, in time removing scruff is an extremely important ring in the wave soldering process.
In general wave soldering process, then must constantly salvage and collect if produce block scruff in the molten tin bath, and then the scruff that will salvage collection for example places, and the reduction machine draws pure tin.Yet reduction machine heavy metal contamination is serious, apparatus expensive not only, related must set up the relevant device that prevents heavy metal contamination, for general factory, has economic benefit anything but, thus major part all be with scruff by the gross weighing sell and reclaim the dealer.Concerning inside plants, in the wave soldering process, the staff needs in time the scruff that floats over the tin liquor surface to be cleared up.During actual job, for avoiding excessive because of clearing up the untimely tin liquor that causes, this clearing times is very frequent, has increased the weight of operating personnel's labor load greatly.On the other hand, because the frequent cleaning scruff of salvaging relatively just need constantly replenish and add new scolder, cause the increase of materials in molten tin bath.Another kind method adds the generation of reducing powder with the reduction scruff in molten tin bath, but reducing powder is seriously polluted to molten tin bath, is not easy to very much cleaning, and must constantly buy reducing powder, and the number of times that more renews tin also can increase, so this method is comparatively rare.
In order to improve above-mentioned shortcoming, proposed to use oxidation resistant oil to reduce the way of scruff.Oxidation resistant oil can float on liquid scolding tin surface, liquid scolding tin and air insulated come, thus the chance of minimizing scolding tin oxidation.But the greasy filth that is to use oxidation resistant oil to produce can pollute molten tin bath, and produces smog, and production environment need be set up extractor fan.Moreover the use greasy filth that oxidation resistant oil produced is sneaked into scruff and is unfavorable for recycling, reduces many utility values.
Therefore, the dealer of association area still needs a kind of easy and can reduce the tin consume, reduce the separation method of tin consumption.
Summary of the invention
Because the problems referred to above, main purpose of the present invention promptly is to provide a kind of method that can reduce the separation scruff of tin consume.
For achieving the above object and other relevant purposes, the present invention provides a kind of method of separating scruff, is applied in the scolding tin ME of in the molten tin bath that is loaded with tin liquor circuit card being carried out, and may further comprise the steps: compile the scruff that the scolding tin ME is produced; The scruff that in molten tin bath, will compile is squeezed into tin ash, makes the part tin composition in this scruff be fused in the tin liquor once more; And salvage and reclaim tin ash.
In the method for above-mentioned separation scruff, use and compile the side that instrument is collected to this scruff this molten tin bath inwall.
In the method for above-mentioned separation scruff, the step that this scruff is squeezed into tin ash further comprises polish process.
In the method for above-mentioned separation scruff, use the abrasive sheet extruding and grind this scruff.
In the method for above-mentioned separation scruff, this compiles instrument is wherein one of strainer and scraper.
In the method for above-mentioned separation scruff, this abrasive sheet has a plurality of perforates, extrudes from this perforate for the part tin composition in the scruff to be fused in this tin liquor.
In the method for above-mentioned separation scruff, the tin content of this scruff is between between the 60wt% to 80wt%.
In the method for above-mentioned separation scruff, salvage this tin ash that reclaims tin content less than 30wt%.
In the method for above-mentioned separation scruff, use strainer to salvage this tin ash.
In the method for above-mentioned separation scruff, comprise that further part is salvaged the tin ash that reclaims is sprinkling upon this tin liquor surface.
Than the tin that scruff the caused waste of directly salvaging high tin content in the past; Method of the present invention is through compiling scruff in the molten tin bath earlier, in molten tin bath, the scruff crush and grind being become tin ash and salvages tin ash; Can separate scruff easily; Reduce the tin waste simultaneously, reduce the tin consumption of circuit board soldering tin ME, help to reduce production costs.
Description of drawings
Fig. 1 is shown as the operational flowchart of the inventive method first specific embodiment;
Fig. 2 is shown as the operational flowchart of the inventive method second specific embodiment.
The main element nomenclature:
S11～S13 step
S21～S23 step
Embodiment
Below through particular specific embodiment embodiment of the present invention is described, those skilled in the art can understand other advantages of the present invention and effect easily by the content that this specification sheets disclosed.
See also Fig. 1, be used for the operational flowchart of separation scruff method first specific embodiment of circuit board soldering tin ME for the present invention.In this specific embodiment, be that circuit card is placed in the molten tin bath that is loaded with tin liquor, use wave soldering automatic tin soldering stove to carry out the circuit board soldering tin ME.In this specific embodiment, this wave soldering automatic tin soldering stove includes molten tin bath and electro-heat equipment, and this tin liquor splendid attire is in this molten tin bath, and this electro-heat equipment is in order to being tin liquor with solder fusing.Tin liquor is upwards sprayed the waveform that forms a protrusion and is formed crest, when circuit card contact crest top, this tin liquor with the junction of soldered elements and board pads to carry out welding operation.Follow performing step S11.
In step S11, compile and slowly accumulate the scruff that the scolding tin ME is produced.In this specific embodiment, use and to compile instrument, for example strainer or scraper, in the scolding tin ME, the scruff on tin liquor surface is collected to one side of molten tin bath inwall.Operator are according to practical situation, and for example the tin liquor amount of molten tin bath institute splendid attire, the factors such as speed of tin liquor surface oxidation are set the pitch time that removes scruff, for example carry out once in 2 hours at interval.Usually, in the scolding tin ME, the tin content in the scruff on tin liquor surface is normally between between the 60wt% to 80wt%.If directly in molten tin bath, scruff is pulled out, then certainly will pull a large amount of tin out, make that the tin amount in the molten tin bath reduces, need to increase the magnitude of recruitment of tinsolder, be unfavorable for scolding tin ME product yield, also increased the consumption of tinsolder.Follow performing step S12.
In step S12, treat this scruff compile and accumulate a certain amount of after, furnace wall below the tin liquor surface is inboard, through carrying out polish process this scruff is squeezed into tin ash, and the part tin composition in this scruff is fused in the tin liquor once more.In this specific embodiment, use abrasive sheet as extruding and the instrument that grinds scruff with handle, this abrasive sheet has a plurality of perforates, when grinding, extrudes from this perforate for the part tin composition in the scruff to be fused in this tin liquor, is beneficial to the grinding of scruff more.Because not oxidized part in the scruff is that oxidized part is wrapped in wherein, after scruff was ground into tin ash, part not oxidized in this scruff will be fused in the tin liquor once more, thereby had reduced the tin content in the tin ash.Follow performing step S13.
In step S13, utilize strainer to salvage and collect tin ash.In this specific embodiment, the tin content of the tin ash that salvage this moment is lower than 30wt%, can significantly reduce in the conventional fabrication processes, salvages the tin consume that scruff caused.
Fig. 2 is second specific embodiment that shows the inventive method.In this specific embodiment, be circuit card to be placed the scolding tin operation of carrying out in the molten tin bath that is loaded with tin liquor carry out.At first carry out step S21, use strainer with in the scolding tin ME, the scruff on tin liquor surface is collected to one side of molten tin bath inwall.Then, carry out step S22, treat this scruff compile accumulation a certain amount of after, use to have the instrument of the abrasive sheet of handle as the crush and grind scruff, the furnace wall below the tin liquor surface is inboard, and this scruff is ground to form tin ash.Because not oxidized part in the scruff is that oxidized part is wrapped in wherein, when scruff was ground into tin ash, part not oxidized in this scruff will be fused in the tin liquor once more, thereby had reduced the tin content in the tin ash.Carry out step S23 at last, utilize strainer to salvage and collect tin ash, wherein, the part tin ash is sprinkling upon the tin liquor surface, produces in order to prevent new scruff, and remainder then utilizes strainer to pull out, reclaims processing and utilizes.
The inventive method is salvaged isolating tin ash can further reclaim reprocessing, is used the reduction machine.Method of the present invention is earlier the scruff crush and grind have been become tin ash, so need not to carry out the operation of abrasive dust again, can the isolating tin ash of salvaging directly be inserted the reduction machine and reduce and obtain pure tin.
Separation scruff method of the present invention in the process that scruff produces, is a tin ash with the scruff crush and grind in molten tin bath just.Because crush and grind forms in the process of tin ash, the part tin in the scruff becomes branch to be dissolved in once more in the tin liquor, therefore, and the scruff amount that the final tin ash amount that produces is produced in the general circuit boards solder ME.On the other hand, in the isolating tin ash of the inventive method institute, the only about 30wt% of tin content is far below the tin content (usually, the tin content of scruff is between 60wt% to 80wt%) of scruff.Hence one can see that, and separation scruff method of the present invention has not only reduced in the scolding tin ME needs isolating scruff amount, reduced simultaneously to use the tin amount in the wave soldering production process.On the other hand,, also alleviated operating personnel's labor load relatively, not only solved the shortcoming of wasting with tin in the prior art, also had the advantage that reduces production costs, tool high industrial utilization simultaneously owing to reduced the number of times of salvaging scruff.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any those skilled in the art all can be under spirit of the present invention and category, and the foregoing description is modified and changed.Therefore, all affiliated those skilled in the art must be contained by the scope of claims not breaking away from all equivalence modifications of being accomplished under disclosed spirit and the technological thought or changing.
Claims (10)
1. a method of separating scruff is applied in the scolding tin ME of in the molten tin bath that is loaded with tin liquor circuit card being carried out, and it is characterized in that, may further comprise the steps:
Compile the scruff that the scolding tin ME is produced;
The scruff that in this molten tin bath, will compile is squeezed into tin ash, and the part tin composition in this scruff is fused in this tin liquor once more; And
Salvage and reclaim this tin ash.
2. the method for separation scruff according to claim 1 is characterized in that, uses and compiles the side that instrument is collected to this scruff this molten tin bath inwall.
3. the method for separation scruff according to claim 2 is characterized in that, the step that this scruff is squeezed into tin ash further comprises polish process.
4. the method for separation scruff according to claim 3 is characterized in that, uses the abrasive sheet extruding and grinds this scruff.
5. the method for separation scruff according to claim 2 is characterized in that, this compiles instrument is wherein one of strainer and scraper.
6. the method for separation scruff according to claim 4 is characterized in that, this abrasive sheet has a plurality of perforates, extrudes from this perforate for the part tin composition in the scruff to be fused in this tin liquor.
7. the method for separation scruff according to claim 1 is characterized in that, the tin content of this scruff is between between the 60wt% to 80wt%.
8. the method for separation scruff according to claim 1 is characterized in that, salvage this tin ash that reclaims tin content less than 30wt%.
9. the method for separation scruff according to claim 1 is characterized in that, uses strainer to salvage this tin ash.
10. the method for separation scruff according to claim 1 is characterized in that, comprises that further part is salvaged the tin ash that reclaims is sprinkling upon this tin liquor surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910253537A CN102086490B (en) | 2009-12-08 | 2009-12-08 | Method for separating tin slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910253537A CN102086490B (en) | 2009-12-08 | 2009-12-08 | Method for separating tin slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102086490A CN102086490A (en) | 2011-06-08 |
| CN102086490B true CN102086490B (en) | 2012-09-05 |
Family
ID=44098494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910253537A Expired - Fee Related CN102086490B (en) | 2009-12-08 | 2009-12-08 | Method for separating tin slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102086490B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627913B (en) * | 2012-08-21 | 2014-12-31 | 理翰应用科技有限公司 | Purification and recovery method for tin slag and recovery apparatus |
| CN103752986B (en) * | 2014-01-22 | 2016-01-13 | 深圳市堃琦鑫华股份有限公司 | A kind of scruff fishing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1372014A (en) * | 2001-02-23 | 2002-10-02 | 萧国雄 | Method for recovering tin from tin plating, dipping and welding and apparatus thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9405418D0 (en) * | 1994-03-18 | 1994-05-04 | Apple House Electronics Ltd | Solder recovery |
-
2009
- 2009-12-08 CN CN200910253537A patent/CN102086490B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1372014A (en) * | 2001-02-23 | 2002-10-02 | 萧国雄 | Method for recovering tin from tin plating, dipping and welding and apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102086490A (en) | 2011-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101461764B1 (en) | Apparatus for deleting top dross of plating pot and Method for recycling the top dross | |
| CN102086490B (en) | Method for separating tin slag | |
| CN104084750A (en) | Submerged-arc welding repair method after alkali production squeezing roller is worn | |
| CN104548823B (en) | Processing method and system containing arsenic flue gas during smelting | |
| CN202380061U (en) | Secondary aluminium recovery device | |
| CN108546823A (en) | A kind of waste metal recycling processing method | |
| CN202317353U (en) | Removing device of electronic components and soldering tin of waste circuit board | |
| CN109371393A (en) | A kind of laser melting coating gear reconstruction restorative procedure | |
| JP3444557B2 (en) | Method and apparatus for collecting solder | |
| CN102371412A (en) | Device and method for removing electronic devices/components and soldered tin from waste circuit boards | |
| CN201634743U (en) | Solder residue separator | |
| JP6431979B2 (en) | Briquette manufacturing method and briquette manufactured using the same | |
| CN107043855A (en) | The recovery purification processes device and method of waste and old precious metal material | |
| US7972411B2 (en) | Method for separating dross in soldering process | |
| CN103540770A (en) | Tin residue reducing machine | |
| CN103212921B (en) | Reductant composition and preparation method thereof, and welding method | |
| CN207272518U (en) | A kind of numerically-controlled machine tool shell automatic welding positioning tool | |
| CN101608262A (en) | Antioxidation chelation reductant for molten metal | |
| CN201106060Y (en) | Tin-slag deacidizing machine | |
| CN205393748U (en) | Automatic submerged arc welding flux recycling device | |
| CN106862744B (en) | Flash welder electrode welding slag method for cleaning and cleaning tool | |
| CN203976924U (en) | A kind of rare precious metal turning material cleans special bubbling rinsing device | |
| CN107377576A (en) | CRT electrical equipment disassembling methods | |
| JP4171748B2 (en) | Solder separator | |
| CN103372697A (en) | Sand dismantling method for removing electronic components on substrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20121208 |