CN1028773C - Recovery for lead-tin on face of copper and copper alloy products - Google Patents
Recovery for lead-tin on face of copper and copper alloy products Download PDFInfo
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- CN1028773C CN1028773C CN 91110457 CN91110457A CN1028773C CN 1028773 C CN1028773 C CN 1028773C CN 91110457 CN91110457 CN 91110457 CN 91110457 A CN91110457 A CN 91110457A CN 1028773 C CN1028773 C CN 1028773C
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
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Abstract
The present invention relates to a recovery technical method of lead-tin, etc. on the surfaces of copper and copper alloy products. A waste and old device with the surface coated with lead-tin (or lead or tin) is immersed in molten salt; molten lead-tin (or lead or tin) alloy is cast into an ingot; the molten salt has the components of 20 to 80% of sodium chloride and 20 to 80% of potassium chloride; the temperature of the molten salt is controlled at 690 to 850 DEG C; the parts of the waste and old device scalded in the molten salt are washed in water so that the lead-tin (or lead or tin) alloy, copper and copper alloy are well separated. The technical method has the advantages of continuous operation, little loss of the molten salt, direct recovery of lead-tin alloy solder as solder again and direct preparation of the copper and the copper alloy into alloy of a suitable number.
Description
The present invention relates to scribble the processing method that reclaims wiping solder (or lead or tin) and copper and copper alloy the copper that contains wiping solder (or lead or tin) and the copper alloy scrap from the surface.
Exist and be coated with tin in a large number, scribble the copper and the copper alloy scrap of wiping solder in the society, the for example water tank of automobile, tractor, ice cream mould etc., scrap every year a lot, particularly the learies of the water tank of automobile, tractor is quite big, and how reclaiming these waste materials is the problems that must solve.The existing recovery and treatment method of above-mentioned waste material is had two: first method is to scribble the waste material of wiping solder on the above-mentioned surface, place wall to hang with in the electric furnace of resistance wire heating, be heated to 600-750 ℃, make its lip-deep wiping solder fusing and drip to furnace bottom, reclaimed after compiling, the shortcoming of this method is under 600-750 ℃ high temperature, be coated in the wiping solder on copper and the copper alloy surface, when dripping to the furnace bottom recovery with liquid pearl attitude, the part slicker solder is oxidized, the oxide compound of its slicker solder still overlays on the surface of copper and copper alloy, can't remove, more be difficult to reclaim, and become the source of pollution that next step reclaims metallic copper and copper alloy again, make the recovery worker of copper and copper alloy complicated, reduced lead, the rate of recovery of tin and copper and copper alloy, the rate of recovery of slicker solder has only about 80%, second method is that copper and copper alloy scrap that the surface scribbles wiping solder are directly put into melting in the refining reverberatory furnace, plumbous, tin, metals such as zinc are all oxidized under 1200 °-1250 ℃ high temperature, and these oxide compound parts fly in the flue dust, and another part slag making claws in the stove and discards.The oxide compound of lead, tin, zinc recycles again in the flue dust, and the copper after refining forms big ear anode, again through being electrolyzed to produce cathode copper.The shortcoming of this method is the oxide compound that metals such as expensive metallic tin, lead, zinc have all changed into them, its part has entered flue dust, another part has entered in the slag, metals such as lead, tin can not directly reclaim with their form of metal, reduced the rate of recovery of these metals, the cost recovery of metals such as metallic lead, tin, zinc is increased, reduced economic benefit widely.
American documentation literature US2,967,769 have introduced the method for a kind of recovery than metals such as slicker solders on the infusible metallic surface, than the fusing point of infusible metal more than 1000 °F.This method has certainweight with title, the waste and old device of being made by the more difficult metallic substance that has plumber's solder on the surface (for example honeycomb scatterer centre portions of junked-auto) is placed in the band foraminous basket, band foraminous basket is put into the crucible that fills molten salt bath, melting salt in up-down vibration basket or the stirring crucible, and in molten salt bath, kept 5-10 minute, the temperature of molten salt bath is below 1000 °F, be preferably 750 °-900 °F, the magnesium chloride that consists of 38-65% of salt bath, the sodium-chlor of 30-53%, the zinc chloride of 3-15%, the metal collection such as slicker solder of fusing are in molten salt bath, scribble lead on the surface, after the waste and old device of making than the infusible metallic substance of metals such as tin soaks in salt bath and finishes, owing to being melted to remove, scolder falls apart, the parts of copper or copper alloy have been become, from molten salt bath, shift out basket, treat that fused salt drains from basket after, the parts of copper in the basket or copper alloy are shifted out from basket, in flowing water, wash, drying is weighed, fused salt is poured out from crucible carefully at leisure, until being arranged, stay in the crucible in fused salt and scolder in a small amount, the scolder that will have fused salt again moves on in another container and dissolves except that desalting with flowing water, collected scolder is particulate state and little bulk, drying is weighed, and metals such as slicker solder are separated with copper and copper alloy.This method is compared its advantage with two kinds of above-mentioned recovery methods and is: because be to place molten salt bath to heat by the waste and old device that constitutes than refractory metal that scribbles slicker solder on the surface, completely cut off air, avoided the oxidation of air to metals such as slicker solders, the rate of recovery of metals such as slicker solder is increased, but because device will be with the fused salt in the crucible carefully after soaking in dissolved salt, from crucible, pour out at leisure, make this technology become intermittent operation, the used time in each operational cycle extends greatly, and the wiping solder that will have fused salt is placed on its lip-deep fused salt of flush away in the flowing water, wiping solder is small-particle again, little bulk, operate careless slightly, easily washed away and lose; Surface at water washing process small particles, little blocky wiping solder is also easily oxidized, in addition, Magnesium Chloride Anhydrous price height, easily suction is difficult to obtain, sink to the Separation and Recovery that crucible bottom influences plumber's solder if in fused salt heat-processed, decomposite the magnesium oxide slag with hydrated magnesium chloride, dissolved salt can not be used continuously, carefully from crucible, pour out at leisure with Bi Bixu at every turn, the loss amount of dissolved salt is increased, the little blocky wiping solder of fine granularity is ingot casting again, and the fusing ingot casting has increased the loss of wiping solder again.
Purpose of the present invention just is to overcome above-mentioned existing shortcoming, work out a kind of recovery wiping solder (or lead or tin) of operate continuously and the processing method of copper and copper alloy, avoid generating in the fused salt MAGNESIUM METAL oxide precipitation, needn't remove fused salt at every turn, thereby reduce the loss of dissolved salt, shortened the time in each operational cycle again widely, the terne metal weldering (or lead or tin) that is melting state of recovery is directly discharged from crucible, cast wiping solder (or lead or tin) ingot, need not reprocess these wiping solders just can be again as the scolder effect, and the copper of recovery and copper alloy can directly be mixed with the alloy of the red copper and the suitable trade mark.
Another object of the present invention is that research and design goes out from copper and copper alloy products surface recovery slicker solder the time, makes wiping solder (or lead or tin) can directly discharge a kind of special copple equipment of casting ingot from the crucible that fills fused salt.
The processing method that the lip-deep slicker solder of a kind of copper of the present invention and copper alloy products reclaims, fusing point is higher than on 850 ℃ the surface and scribbles the copper of slicker solder (or lead or tin) and the waste and old device of copper alloy system, place molten salt bath to soak 1-15 minute, stir fused salt or bob and weave and scribble the waste and old device of slicker solder (or lead or tin) in its surface, used molten salt bath consist of sodium chloride-containing 20-80%, contain Repone K 20-80%, the temperature of control molten salt bath is 690 °-850 ℃, the wiping solder (or lead or tin) that scribbles the molten state that the waste and old device of the copper of terne metal (or lead or tin) and copper alloy system separates from the surface sinks to the bottom of the container that fills fused salt, discharge from the weif orifice of container bottom lowest part, cast ingot, from fused salt, take out the copper of disintegration automatically and the parts of the waste and old device that copper closes system, above crucible, stop a moment slightly, making its surface go up adherent fused salt is dropped in the crucible, be placed in the water again and wash, thereby reach the isolating purpose of wiping solder (or lead or tin) and copper and copper alloy.
The lip-deep slicker solder of copper of the present invention and copper alloy products reclaims the special copple of processing method, it is a tubbiness, a weif orifice is arranged, block with a plug, the bottom surface of crucible tilts to the weif orifice place, the angle of its squint (being the bottom surface of crucible and the angle β of level) is 10 °-15 °, weif orifice is positioned at the lowest part of crucible bottom side, so that make the wiping solder that sinks to crucible bottom (or lead or tin) of fusing collect in the weif orifice place, after treating that wiping solder (or lead or tin) gathers some amount, discharge, cast ingot.
Place dissolved salt to bathe the waste and old device that scribbles slicker solder on its surface and soak, the time of its immersion is between 1-15 minute.The time of soaking is too short, it is isolating not exclusively to be coated in lip-deep wiping solder (or lead or tin) tip-off, wiping solder (or lead or tin) rate of recovery reduces, and do not scald the terne metal that gets off on copper and the copper alloy surface and still be attached on copper and the copper alloy surface, the overlong time of immersion is used in the recovery that influences copper and copper alloy, prolonged the time of technological process, waste energy, can not improve the rate of recovery of slicker solder, so the time of soaking in molten salt bath was good with 5-10 minute.
Scribble the copper of plumber's solder (or lead or tin) and copper alloy system on the said surface, waste and old device is copper and the copper alloy scrap that scribbles slicker solder, wiping solder on all surfaces such as the waste water tank of automobile, tractor, useless ice cream mould, refrigerator radiator tube.Introducing domestic automobile, the used tubular type water tank of tractor, pipe according to data is H90 brass, and sheet is the T2 red copper, is welded with No. 10 or No. 20 wiping solders.
On with its surface, scribble in the waste and old copper of wiping solder (or lead or tin) and the process that copper alloy device is immersed in dissolved salt, wiping solder (or lead or tin) and fused salt be react with not, fusing point low (be about about 200 °-300 ℃, it is 183 ℃ that the eutectic temperature of slicker solder has only).Be coated in the wiping solder (or lead or tin) that has on copper and the copper alloy surface be melted separate after, because the proportion of wiping solder (or lead or tin) and fused salt differs greatly (4-5 that the proportion of wiping solder is about fused salt proportion doubly), collect in the weif orifice place and obtain reclaiming so dissolve bottom that the terne metal (or lead or tin) that gets off sinks to crucible very soon.Because wiping solder (or lead or tin) all is immersed in the fused salt, avoided and the contacting of air, wiping solder (or lead or tin) can be not oxidized, copper and copper alloy also not with the fused salt react with, and its fusing point is all more than 850 ℃, and for example fusing point is arranged is 1083 ℃ to red copper, and the fusing point of H90 brass is about 1050 ℃, the fusing point of H62 brass is about about 900 ℃, so wiping solder (or lead or tin) can well be separated with copper and copper alloy.
Molten salt bath consist of sodium chloride-containing 20-80%, contain Repone K 20-80%, the fusing point of sodium-chlor is that the fusing point of 803 ℃ of Repone K is 775 ℃, and the fusing point of the sodium-chlor of 50% Repone K and 50% is about 660 ℃, so the composition of molten salt bath is to contain 50-70% sodium-chlor, the Repone K that contains 30-50% is good.
The temperature of control molten salt bath is 690 °-850 ℃, and the temperature of molten salt bath is too low, and the viscosity of fused salt increases when being lower than 690 ℃, mobile variation.When from dissolved salt is bathed, taking out the parts of the copper that disintegrated and the waste and old device of copper alloy, adherent fused salt amount increases on its face, the salt crust that next step cleaning is removed on copper and the copper alloy surface has increased difficulty, and the speed that the loss amount that has increased fused salt makes the terne metal that melts sink at the bottom of the crucible simultaneously is also slack-off; The temperature height of fused salt, its good fluidity, viscosity is little, and the time of immersion can suitably reduce, and can reduce the loss of dissolved salt again, and the speed that the wiping solder that melts is sunk at the bottom of the crucible accelerates, and helps the Separation and Recovery of wiping solder.But the temperature of molten salt bath is too high, is higher than 850 ℃, and Repone K has a small amount of volatilization loss, has polluted environment, and energy expenditure is big, and operation is also inconvenient, so the temperature of molten salt bath is to be controlled at 700 °-760 ℃ for good.
The processing method that slicker solder of the present invention reclaims, though sodium-chlor that will prepare and Repone K mixing salt are put into the fusing of crucible internal heating, the method of heating is coal gas heating or coal-fired heating, preferably big chamber and burner hearth are separated during coal-fired the heating, when treating that the fused salt temperature reaches 690 °-850 ℃, the mesh screen basket that scribbles the waste and old device of slicker solder on its surface will be filled, be dipped into during 690 °-850 ℃ dissolved salt bathes, in immersion process, stir the fused salt or the mesh screen basket of bobbing and weaving, make the terne metal (or lead or tin) that is coated in copper and the waste and old device of copper alloy, be subjected to that terne metal (or lead or tin) that washing away of fused salt make tip-off hightails copper material surface and the bottom that sinks to crucible.Soak time is 1-15 minute, preferably 5-10 minute, basket is proposed, and above crucible, stop a moment slightly, put into the prior ready tank that fills water and wash, wash the fused salt that adheres on its surface off.Through the surface cleaning of the copper material after the flushing, can be used for preparation according to the trade mark of alloy and produce corresponding alloy.The waste and old water tank of automobile after soaking for example, radiating pipe and radiator element are thrown off automatically, separate through picking again, deliver to the ingot casting of the corresponding alloy designations of melting between alloy car, also can be with the copper that reclaims and copper alloy preparation leaded brass or tin leaded brass 59-1,58-2 etc.
The used water temp of fused salt on the flush away copper material surface in tank does not have strict restriction, generally gets final product with cold water, and for example the tap water of room temperature needn't heat or cool off in addition.The time of washing in water depends primarily on the situation of cleaning, generally about 1-15 minute, have only with two, three minutes, in tank, wash the water of copper material, when wherein saliniferous concentration reaches certain value, can also recycle.
The crucible that the lip-deep slicker solder of copper and copper alloy products reclaims the technology special use is a tubbiness, the shape of bucket can be the bucket of drum shape, oval barrel-shaped, square barrel-shaped, rectangular barrel-shaped a kind of shape wherein, but for well, the volume of crucible is decided on the scale of production with drum shape.For the ease of the carrying and installation of crucible equipment, around suitable for reading, a flange is installed near crucible, three hangers are installed on flange.If crucible is a drum shape, flange is circular then three positions of hanger on flange, is 90 with the angle between two hangers.It is that good, used special copple can cylinder iron be cast or be welded with steel plate that angle between two hangers of another hanger and this becomes 135 ° of angles respectively, and the plug of weif orifice can cylinder iron be cast or become with the round steel car.For example the steel plate with 10 mm thick is welded into drum shape crucible, used basket can be decided according to the shape of crucible, can make drum shape or rectangular different shape such as barrel-shaped, its method for making is that the steel bar with diameter 8 millimeter is welded, the size of basket with each side around the basket apart from 150 millimeters left sides of crucible inwall in being advisable.Processing method of the present invention also is applicable to the recovery of the useless tinware spare of scrap lead word etc.
Processing method of the present invention, also has the following advantages outside the various advantages such as rate of recovery height of 967,769 wiping solders that had (or lead or tin) except having american documentation literature US2, and they are:
(1) processing method operate continuously of the present invention, its fused salt composition is that sodium-chlor adds Repone K, american documentation literature US2,969, the 769 fused salt compositions of being introduced are 38-65% magnesium oxide, the sodium-chlor of 30-53%, the zinc chloride of 3-15%, avoided the magnesium chloride in fused salt to resolve into the magnesium oxide precipitation slagging in the high-temperature lower part branch, on sinking at the bottom of the crucible, influence the shortcoming that terne metal (or lead or tin) reclaims, be beneficial to the recovery of terne metal (or lead or tin) again, the loss amount of fused salt is little, the time in each operational cycle shortens widely, can add needed mixing salt at any time again, the terne metal (or lead or tin) that reclaims can directly be emitted from crucible and be cast alloy pig, directly use or according to user's needs as scolder, with it is that the basis is allocated an amount of lead or tin into, be mixed with new scolder, copper that reclaims and copper alloy be the raw material of the copper alloy of the suitable trade mark of conduct preparation directly, needn't be again through being smelted into operations such as big ear anode production electrolytic copper, make the copper and the copper alloy of recovery obtain directly rationally using, so processing method of the present invention is simple, cost is low, good in economic efficiency, copper, copper alloy, the rate of recovery height of wiping solder (or lead or tin), for example wiping solder becomes the rate of recovery behind the ingot all up to more than 92%.
2. the crucible device structure of technology special use of the present invention is simple, and is easy to use effective.
Fig. 1 slicker solder of the present invention reclaims the facade view of technology special copple
(1) be that crucible (2) is that weif orifice (4) is a hanger for sidewall of crucible (3)
Fig. 2 slicker solder of the present invention reclaims the vertical view of technology special copple
Fig. 3 contains the mesh screen basket synoptic diagram of the waste and old device that the surface scribbles slicker solder
More specifically describe the present invention with following indefiniteness embodiment, will help understanding, and not as the qualification to protection domain of the present invention, protection scope of the present invention is determined by claims the present invention and advantage thereof.
Take by weighing a certain amount of waste and old water tank of automobile and place drum shape mesh screen basket through water flushing after drying, operate by above-mentioned formality and equipment, in fused salt, soaked 3 minutes, in immersion process, make mesh screen basket constantly bob and weave (also can stir fused salt), make the wiping solder that has melted sink to crucible bottom rapidly, used molten salt bath consist of sodium chloride-containing 75%, contain Repone K 25%, heat fused salt with coal gas, the temperature of control molten salt bath is 830 ℃ ± 5 ℃ and is pooled to a certain amount of wiping solder and discharges from the crucible weif orifice, cast the wiping solder ingot, weigh, from molten salt bath, mesh screen basket is proposed, above crucible, stop a moment, from mesh screen basket, take out the parts of the junked-auto water tank that has disintegrated, putting into the tank that fills water immediately washes, water temperature in the tank is a room temperature, washed 7 minutes, flush away sticks in the salt on the junked-auto tank parts that scatters, weigh after the drying, the alloy of the corresponding trade mark of melting between alloy car is separately delivered in picking, the rate of recovery of the wiping solder behind the ingot casting is 94%, leaded 82.47% stanniferous 15.24% in the wiping solder, cupric 99% in the red copper, cupric 90% in the brass, and both can make H62 respectively and H59-1 copper alloy wiping solder can directly be made scolder.
Its working method and equipment used be substantially with embodiment 1, and only different is to soak 7 minutes in fused salt, molten salt bath consist of sodium chloride-containing 65%, contain Repone K 35%, the temperature of control molten salt bath is 790 ℃ ± 5 ℃, and flushing is 12 minutes in tank, and the rate of recovery of the wiping solder behind the ingot casting is 93.9%, in the wiping solder leaded 35.42%, stanniferous 37.66%, cupric 99% in the red copper, and cupric 90% in the brass, both make H62 respectively, the H59-1 alloy.Wiping solder can directly be made scolder.
Its working method and equipment used be substantially with embodiment 1, and only different is to soak 5 minutes in fused salt, molten salt bath consist of sodium chloride-containing 50%, contain Repone K 50%, the temperature of control molten salt bath is 720 ℃ ± 5 ℃, and flushing is 10 minutes in tank, and the rate of recovery of the wiping solder behind the ingot casting is 92%, in the wiping solder leaded 90%, stanniferous 1.65%, cupric 99% in the red copper, and cupric 90% in the brass, both can make H62, H59-1 alloy respectively.Wiping solder can directly be made scolder.
Its working method and equipment used be substantially with embodiment 1, and only different is to soak 10 minutes in fused salt, molten salt bath consist of sodium chloride-containing 35%, contain Repone K 65%, the temperature of control molten salt bath is 760 ℃ ± 5 ℃, flushing is 12 minutes in tank.
Embodiment 5
Its working method and equipment used be substantially with embodiment 1, and only different is to soak 15 minutes in fused salt, molten salt bath consist of sodium chloride-containing 25%, contain Repone K 75%, the temperature of control molten salt bath is 810 ℃ ± 5 ℃, flushing is 15 minutes in tank.
Claims (7)
1, the processing method that the lip-deep slicker solder of a kind of copper and copper alloy products reclaims, fusing point is higher than 850 ℃, scribble the copper of terne metal (or lead or tin) and the waste and old device of copper alloy system on the surface, place molten salt bath to soak 1-15 minute, stir fused salt or bob and weave and scribble the waste and old device of terne metal (or lead or tin) in its surface, used fused salt consist of sodium chloride-containing 20-80%, contain Repone K 20-80%, the temperature of control molten salt bath is 690 ℃-850 ℃, from molten salt bath, take out the parts of the waste and old device of existing copper that disintegrates automatically and copper alloy system, in water, wash, wherein
1) fused salt places crucible, and the bottom surface of crucible tilts to weif orifice, and the angle of its inclination is 10 °-15 °,
2) wiping solder (or lead or tin) that scribbles the molten state that the waste and old device of the copper of terne metal (or lead or tin) and copper alloy system separates from the surface sinks to the bottom of the crucible that fills dissolved salt, discharge from the weif orifice of the lowest part of its crucible bottom, cast ingot.
2, the processing method that reclaims according to the slicker solder of claim 1 is characterized in that, fused salt consist of sodium chloride-containing 50-70%, contain Repone K 30-50%,
3, the processing method that reclaims according to the slicker solder of claim 1 is characterized in that, the temperature of control fused salt is 700 °-760 ℃,
4, the lip-deep slicker solder of a kind of copper and copper alloy products reclaims the special copple of technology, and feature of the present invention is, is a tubbiness, one weif orifice is arranged, block with a plug, the bottom surface of crucible tilts to the weif orifice place, its oblique angle is 10 °-15 °, and weif orifice is positioned at the lowest part of crucible bottom side
5, according to the special copple of claim 4, it is characterized in that, near crucible, crucible suitable for reading around a flange is installed.
6, according to the special copple of claim 5, it is characterized in that, three hangers are installed on flange.
According to the special copple of claim 5, it is characterized in that 7, crucible is a round barrel shape, flange is that circular three hangers are that two angles between the hanger are 90 ° in the position on the flange, is respectively 135 ° of angles between another hanger and this two hangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91110457 CN1028773C (en) | 1991-11-09 | 1991-11-09 | Recovery for lead-tin on face of copper and copper alloy products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91110457 CN1028773C (en) | 1991-11-09 | 1991-11-09 | Recovery for lead-tin on face of copper and copper alloy products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1072218A CN1072218A (en) | 1993-05-19 |
| CN1028773C true CN1028773C (en) | 1995-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 91110457 Expired - Fee Related CN1028773C (en) | 1991-11-09 | 1991-11-09 | Recovery for lead-tin on face of copper and copper alloy products |
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| CN (1) | CN1028773C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2435717T3 (en) * | 2005-07-26 | 2013-12-23 | Nihon Superior Sha Co., Ltd | Device for precipitation of copper in lead-free solder, for granulation and separation of compounds (CuX) 6Sn5 and for tin recovery |
| CN102002594B (en) * | 2010-12-17 | 2012-09-19 | 赖小洪 | Method for recycling tin |
| CN102877088A (en) * | 2011-07-15 | 2013-01-16 | 王旗兵 | Novel method for removing tin and lead from water tank |
| CN103785912A (en) * | 2012-10-26 | 2014-05-14 | 浙江三瑞铜业有限公司 | Copper water tank detinning method and equipment |
| CN103484679B (en) * | 2013-09-13 | 2015-05-13 | 江西理工大学 | Method for recycling tin and copper from waste tinned copper needles |
| CN105567971B (en) * | 2014-10-06 | 2018-04-13 | 上海奇谋能源技术开发有限公司 | The technique that Physical separates copper and scolding tin mixture |
| CN105256140A (en) * | 2015-10-13 | 2016-01-20 | 湖南省金润碲业有限公司 | Method for separating tin-bismuth alloy and titanium or stainless steel from tin-bismuth alloy and titanium or stainless mixed chippings |
| CN105585255B (en) * | 2016-03-07 | 2017-12-19 | 秦皇岛玻璃工业研究设计院 | A kind of paralysis facility and passivating method for preventing flint glass lead ion dissolution |
| CN108486375A (en) * | 2018-02-24 | 2018-09-04 | 宁夏天元锰业有限公司 | A kind of method of waste and old anode plate hangers resource recycling |
| CN112501616B (en) * | 2020-11-10 | 2023-03-07 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | Method and device for removing lithium alloy adhered to surface of metal sample piece |
| CN113981233A (en) * | 2021-11-15 | 2022-01-28 | 西安西热锅炉环保工程有限公司 | System and method for recovering metal by using non-metal mother liquor |
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1991
- 1991-11-09 CN CN 91110457 patent/CN1028773C/en not_active Expired - Fee Related
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| CN1072218A (en) | 1993-05-19 |
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