CN107142376A - A kind of method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material - Google Patents
A kind of method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material Download PDFInfo
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- CN107142376A CN107142376A CN201710212578.7A CN201710212578A CN107142376A CN 107142376 A CN107142376 A CN 107142376A CN 201710212578 A CN201710212578 A CN 201710212578A CN 107142376 A CN107142376 A CN 107142376A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/023—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B25/00—Obtaining tin
- C22B25/04—Obtaining tin by wet processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B25/00—Obtaining tin
- C22B25/06—Obtaining tin from scrap, especially tin scrap
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/02—Obtaining antimony
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/04—Obtaining arsenic
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/06—Obtaining bismuth
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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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 kind of method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material, comprise the following steps：(1) it is less than 1% by the mass fraction of the complicated leaded noble metal materials drying to water, the levigate mesh sieve of mistake 100 weighs the parts by weight of fine powder 100, the parts by weight of NaOH 40~80, Na of complicated leaded noble metal materials2The parts by weight of S 20~65, the parts by weight of carbon dust 5~40, carry out caustic fusion (2) after after alkali scum silica frost cooling, under the conditions of temperature is 60 DEG C~90 DEG C, add water leaching after above-mentioned material is mixed.The method technological process of the efficiently concentrating separation valuable metals from complex lead-containing precious metal material of the present invention is short, can be directly used for reclaiming lead noble metal；Reaction condition is gentleer, and energy consumption is lower, is advantageously implemented industrialization；The comprehensive recovery of valuable element is high；It is environment-friendly, clean manufacturing can be achieved.
Description
Technical field
The present invention relates to a kind of recovery method of valuable metal, specifically a kind of efficiently concentrating separates complicated leaded noble metal
The method of valuable metal in lead, bismuth, tin, antimony, gold, silver in material etc..
Background technology
Current domestic many non-ferrous smelt enterprises, meeting output complexity contains after main metallic copper, lead and noble metal is extracted
Still include in lead noble metal materials, these complicated leaded noble metal materials the valuable metals such as Pb, Sn, Sb, Bi, Ag, Au and
Substantial amounts of harmful element is such as：As, S etc..Such material such as without processing, be allowed to a large amount of storages, local environment will be made
Into serious harm.These materials are returned to the smelting technology of main metal or melted using sintering-blast furnace reduction by many producers
Refining, both processing modes all non-specially treated technique for such waste residue, do not account for wherein valuable metal lead, tin, antimony,
The recovery of tellurium, does not account for the prevention of arsenic pollution, and the rate of recovery of noble metal is also relatively low.
Chinese patent document 201210095580.8 discloses the method choice that a kind of utilization low-temperature alkali melting-water logging goes out
Property separation complex multi-metal material in metal method, using this method can not realize to gold, silver, lead, bismuth simple substance effectively return
Receive, simply by metal enrichments such as gold, silver, lead, bismuths in leached mud, and the metal such as tin, antimony, arsenic is then enriched in leachate, leaching
Slag tap, need to be further processed.Chinese patent document 201210095056.0, which is then disclosed, utilizes caustic soda, coke blacking
By the method that valuable metal melting obtains precious metals containing lead alloy in complicated sulfur-and lead-containing waste residue, this method is to soaking in 201210095580.8
The further melting processing slagged tap, so as to reclaim the precious metals containing lead alloy for obtaining gold, silver, lead, bismuth.Use both technique junctions
Complex multi-metal material is managed, then needs, by two sections of meltings, to be firstly added NaOH, Na2S, melting is melted at 300~600 DEG C
Product is refined, after smelted product is gone out by water logging, gold, silver, lead, bismuth are enriched in leached mud, and tin, antimony, arsenic are in leachate；Second
In section fusion process, leached mud need to also be needed to add the raw materials such as NaOH, coke blacking in addition, in 600- by filtering, drying and processing
Melting obtains precious metals containing lead alloy at 800 DEG C.Vulcanized lead can be produced after the method complex process, long flow path, and first paragraph melting
Thinner, the problem of filtration difficulty being caused of grain.
The content of the invention
The technical problems to be solved by the invention are to overcome the shortcomings of to mention with defect that there is provided one in background above technology
Plant the method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material.This method is obtained by the step caustic fusion of low temperature one
To precious metals containing lead alloy and alkali scum silica frost, then the elements such as tin, antimony, arsenic in alkali scum silica frost are effectively extracted by water extract technology, can be achieved one
Walk the valuable metal in the complicated leaded noble metal materials of high efficiency extraction.
In order to solve the above technical problems, technical scheme proposed by the present invention is：
A kind of method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material, comprises the following steps
(1) it is less than 1% by the mass fraction of the complicated leaded noble metal materials drying to water, the levigate mesh sieve of mistake 100,
Take the parts by weight of fine powder 100, the parts by weight of NaOH 40~80, Na of complicated leaded noble metal materials2The parts by weight of S 20~65, carbon dust 5
Caustic fusion is carried out after~40 parts by weight, mixing, upper strata obtains alkali scum silica frost, and lower floor obtains the precious metals containing lead melt of enriching noble metals；
(2) after after alkali scum silica frost cooling, under the conditions of extraction temperature is 60 DEG C~90 DEG C, the leaching 60 that adds water~
120min, is filtrated to get leachate and leached mud.
After the step (1) low-temperature alkali melting, tell that the rate of recovery of lead in the precious metals containing lead melt of enriching noble metals is more than
95%th, the rate of recovery of bismuth is more than the rate of recovery of the rate of recovery more than 86%, silver of 97%, gold more than 96%.
After going out through the step (2) water logging, in leachate the rate of recovery of tin be more than the 85%, rate of recovery of antimony be more than 95%,
The rate of recovery of arsenic is more than 96%.
The lead in complicated metalliferous material containing precious metals containing lead, arsenic handled by the present invention is mainly with Pb5(AsO4)3Cl form is present,
Antimony exists in the form of Polymetallic sulphide, and tin, bismuth are mainly with SnO2、Bi2O3Form exist.Efficiently concentrating of the present invention
In the method for separating valuable metals from complex lead-containing precious metal material, the fusion process of the step (1) is a reduction process,
Carbon dust is used mainly as reducing agent, and the addition of carbon dust provides stronger reducing atmosphere to reaction, is reduced into lead, bismuth
Simple substance formation precious metals containing lead melt, so as to realize the recovery to lead, bismuth.With the increase of carbon dust, the rate of recovery of lead and bismuth is all significantly carried
Height, but carbon dust can not be excessive, because after carbon dust increases to a certain amount of, the recovery of lead and bismuth is very abundant.The precious metals containing lead melts
Body includes each component of following weight fraction：Lead 92%~98%, bismuth 6%~8%, gold 1%~2%, silver 0.001%~
0.002%.
Further, in the step (1), the mode of mixing be by the fine powder of complicated leaded noble metal materials, NaOH,
Na2S, carbon dust are uniformly mixed or first by fine powder, powdered carbon and Na containing complicated leaded noble metal materials2S is mixed and is placed in crucible bottom
Layer, upper strata is then covered with NaOH.Purpose is to make material fully contact and reaction during caustic fusion.
It is preferred that, in the step (1), under the conditions of 500 DEG C~700 DEG C, carry out caustic fusion, smelting time be 4h~
Sufficiently high temperature and sufficiently long smelting time are must assure that in 6h, fusion process, so that complicated metalliferous material containing precious metals containing lead
In lead and bismuth fully reduced, however, it is preferred to, smelting temperature is not above 700 DEG C, and smelting time can not be longer than 6h,
On this condition, lead and bismuth are fully reduced, and unnecessary waste can be caused by continuing to increase.
It is preferred that, it is 3~7 by the mass ratio of water and alkali scum silica frost in the step (2)：1 is stirred leaching.Liquid-solid ratio
It is too low, Na3AsO4、Na2SnO3、Na3SbS3, can dissolve insufficient, crystallization separate out；Liquid-solid ratio is too high to be made in leachate
Na3AsO4、Na2SnO3、Na3SbS3Solubility reduction, be unfavorable for follow-up recovery.
Following reaction occurs during low-temperature alkali direct smelting：
2Pb5(AsO4)3Cl+20NaOH+5C=10Pb+6Na3AsO4+2NaCl+10H2O+5CO2
2Bi2O3+ 3C=4Bi+3CO2
SnO2+ 2NaOH=Na2SnO3+H2O(g)
2Sb2S3+9O2=2Sb2O3+6SO2
2Sb2O3+6Na2S+3H2O=2Na3SbS3+6NaOH
After melting, lead, bismuth are reduced into simple substance, the gold, silver formation precious metals containing lead melt that lead, bismuth trapping elemental form are present, institute
State in precious metals containing lead melt, arsenic, antimony, tin generate water-soluble Na respectively3AsO4、2Na3SbS3And Na2SnO3, enter after going out through water logging
In leachate, can further it be reclaimed.
Compared with prior art, the advantage of the invention is that：
The method technological process of the efficiently concentrating separation valuable metals from complex lead-containing precious metal material of the present invention is short, it is only necessary to
Want one section of melting, energy melting once reduction generation lead, bismuth, it is to avoid produce the intermediate products such as vulcanized lead, the precious metals containing lead that melting is obtained melts
Body can be directly used for reclaiming lead noble metal；Reaction condition is gentleer, and energy consumption is lower, is advantageously implemented industrialization；In leachate
Tin, antimony recovery are high, can effectively realize the comprehensive of valuable element in the materials of metal such as complicated leaded, bismuth, tin, antimony, noble metal
Close and reclaim；Leached mud can be used for production construction material after pyrogenic attack, free from environmental pollution, realize clean manufacturing.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of technique of the method for efficiently concentrating separation valuable metals from complex lead-containing precious metal material of the present invention
Flow chart.
Fig. 2 is the XRD spectrum figure for the complicated leaded noble metal materials that the embodiment of the present invention 1 and 2 is used.
Embodiment
For the ease of understanding the present invention, more comprehensively, meticulously retouched below in conjunction with preferred embodiment to inventing to do herein
State, but protection scope of the present invention is not limited to specific examples below.
Unless otherwise defined, all technical terms used hereinafter are generally understood that implication phase with those skilled in the art
Together.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to the limitation present invention's
Protection domain.
Unless otherwise specified, various raw material, reagent, instrument and equipment used in the present invention etc. can be by city
Field is commercially available or can prepared by existing method.
As shown in Fig. 2 being analyzed using X-ray fluorescence spectra, the complicated leaded noble metal that various embodiments of the present invention are used
Material includes each element of mass fraction shown in table 1：
Table 1：Complicated leaded noble metal materials chemical component table.
| Pb | SnO2 | Sb | As | Bi2O3 | Ag | Au |
| (33.73 wt%) | 8.55 (wt%) | 6.06 (wt%) | 3.57 (wt%) | 2.58 (wt%) | 2.71kg/t | 0.018kg/t |
In the complicated leaded noble metal materials, lead element, arsenic element are with Pb5(AsO4)3Cl form is present, and antimony is with sulphur
The form of compound is present, and tin element, bismuth element are with SnO2、Bi2O3Form exist, gold element, silver element are deposited in the form of simple substance
.
Embodiment：
Embodiment 1
The processing step as described in Fig. 1, efficiently concentrating described in the present embodiment separates valuable gold in complicated leaded noble metal materials
The method of category, comprises the following steps：(1) low-temperature alkali direct smelting, be by complicated leaded noble metal materials drying to water content
Less than 1%, the levigate mesh sieve of mistake 100 takes complicated leaded noble metal materials fine powder 30g, NaOH 18g, Na2S 15g, carbon dust 5g, will
After above-mentioned material is well mixed, it is placed in crucible and delivers in electric furnace, at 500 DEG C after melting 6h, crucible, earthenware are taken out from electric furnace
The melt of crucible be divided into above and below two layers, upper strata be alkali scum silica frost, lower floor be enriching noble metals precious metals containing lead melt, melt after cooling, mill
Carefully, X-ray fluorescence spectra analysis is used to detect that calculate the rate of recovery of lead is for the rate of recovery of 95.11%, bismuth
97.52%th, the golden rate of recovery is that the 86.33%, rate of recovery of silver is 96.74%.
(2) it is 7 by the mass ratio of water and alkali scum silica frost after after the cooling of alkali scum silica frost：1 adds water leaching, under the conditions of 90 DEG C, stirring
Leach 80 minutes, be filtrated to get leachate and leached mud, the content belonged to using atomic emission detection GOLD FROM PLATING SOLUTION is computed
The rate of recovery that tin in leachate can be obtained is that the rate of recovery of 86.32%, antimony is that the rate of recovery of 96.41%, arsenic is 97.18%.
Embodiment 2
The processing step as described in Fig. 1, efficiently concentrating described in the present embodiment separates valuable gold in complicated leaded noble metal materials
The method of category, comprises the following steps：(1) low-temperature alkali direct smelting, be by complicated leaded noble metal materials drying to water content
Less than 1%, the levigate mesh sieve of mistake 100 takes complicated leaded noble metal materials fine powder 50g, NaOH 40g, Na2S 30g, carbon dust 5g, will
After above-mentioned material is well mixed, it is placed in crucible and delivers in electric furnace, at 600 DEG C after melting 5h, crucible, earthenware are taken out from electric furnace
The melt of crucible be divided into above and below two layers, upper strata be alkali scum silica frost, lower floor be enriching noble metals precious metals containing lead melt, melt after cooling, mill
Carefully, X-ray fluorescence spectra analysis is used to detect that be computed can obtain the rate of recovery of lead is for the rate of recovery of 96.16%, bismuth
97.43%th, the golden rate of recovery is that the 87.51%, rate of recovery of silver is 96.31%.
(2) it is 5 by the mass ratio of water and alkali scum silica frost after after the cooling of alkali scum silica frost：1 adds water leaching, under the conditions of 60 DEG C, stirring
Leach 120 minutes, be filtrated to get leachate and leached mud, the content belonged to using atomic emission detection GOLD FROM PLATING SOLUTION, through meter
Calculation can be obtained, and the rate of recovery of tin is that the rate of recovery that the rate of recovery of 88.54%, antimony is 95.59%, arsenic is 98.56% in leachate.
Embodiment 3
The processing step as described in Fig. 1, efficiently concentrating described in the present embodiment separates valuable gold in complicated leaded noble metal materials
The method of category, comprises the following steps：(1) low-temperature alkali direct smelting, be by complicated leaded noble metal materials drying to water content
Less than 1%, the levigate mesh sieve of mistake 100 takes material containing complex multi-metal fine powder 100g, NaOH 65g, Na2S 20g, carbon dust 10g, will
After above-mentioned material is well mixed, it is placed in crucible and delivers in electric furnace, at 650 DEG C after melting 4h, crucible, earthenware are taken out from electric furnace
The melt of crucible be divided into above and below two layers, upper strata be alkali scum silica frost, lower floor be enriching noble metals precious metals containing lead melt, melt after cooling, mill
Carefully, X-ray fluorescence spectra analysis is used to detect that be computed can obtain the rate of recovery of lead is for the rate of recovery of 96.72%, bismuth
97.54%th, the golden rate of recovery is that the 86.32%, rate of recovery of silver is 96.86%.
(2) it is 4 by the mass ratio of water and alkali scum silica frost after after the cooling of alkali scum silica frost：1 adds water leaching, under the conditions of 75 DEG C, stirring
Leach 90 minutes, be filtrated to get leachate and leached mud, the content belonged to using atomic emission detection GOLD FROM PLATING SOLUTION is computed
It can obtain, the rate of recovery of tin is that the rate of recovery that the rate of recovery of 87.11%, antimony is 98.34%, arsenic is 99.51% in leachate.
Claims (7)
1. a kind of method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material, it is characterised in that including as follows
Step：
(1) it is less than 1% by the mass fraction of the complicated leaded noble metal materials drying to water, the levigate mesh sieve of mistake 100 is weighed
The parts by weight of fine powder 100 of complicated leaded noble metal materials, the parts by weight of NaOH 40~80, Na2The parts by weight of S 20~65, carbon dust 5~
40 parts by weight, carry out caustic fusion, upper strata obtains alkali scum silica frost, and lower floor obtains the precious metals containing lead of enriching noble metals after above-mentioned material is mixed
Melt；
(2) after after alkali scum silica frost cooling, under the conditions of temperature is 60 DEG C~90 DEG C, add water leaching 60min~120min,
It is filtrated to get leachate and leached mud.
2. the method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material according to claim 1, its feature
It is, in the step (1), under the conditions of 500 DEG C~700 DEG C, carries out caustic fusion, smelting time is 4h~6h.
3. the method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material according to claim 1, its feature
It is, in the step (1), the mode of mixing is by fine powder, NaOH, Na of complicated leaded noble metal materials2S, carbon dust are uniform
Mixing.
4. the method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material according to claim 1, its feature
It is, in the step (1), the mode of mixing is first by fine powder, powdered carbon and Na containing complicated leaded noble metal materials2S is mixed
Bottom is placed in, upper strata is then covered with NaOH.
5. the method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material according to claim 1, its feature
It is, is 3~7 by the mass ratio of water and alkali scum silica frost in the step (2)：1 is stirred leaching.
6. the method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material according to claim 1, its feature
It is, the precious metals containing lead melt includes each component of following weight fraction：Lead 92%~98%, bismuth 6%~8%, gold 1%~
2%th, silver 0.001%~0.002%.
7. the method that efficiently concentrating separates valuable metals from complex lead-containing precious metal material according to claim 1, its feature
It is, in the complicated leaded noble metal materials, lead element, arsenic element are with Pb5(AsO4)3Cl form is present, and antimony is with sulfide
Form exist, tin element, bismuth element are with SnO2、Bi2O3Form exist, gold element, silver element exist in the form of simple substance.
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Citations (7)
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|---|---|---|---|---|
| JPS575829A (en) * | 1980-06-14 | 1982-01-12 | Dowa Mining Co Ltd | Separating and recovering method for tin in lead refining process |
| US5108497A (en) * | 1990-09-05 | 1992-04-28 | Indium Corporation Of America | Treatment of indium dusts |
| CN101724753A (en) * | 2009-12-28 | 2010-06-09 | 中南大学 | Low-temperature alkaline lead-smelting method |
| CN102080158A (en) * | 2010-12-30 | 2011-06-01 | 郴州市金贵银业股份有限公司 | Pyrogenic attack comprehensive recovery process for lead and silver slag leached from bismuth oxide slag |
| CN102586584A (en) * | 2012-04-01 | 2012-07-18 | 大冶有色金属有限责任公司 | Method for selectively separating valuable metals from complex lead-containing precious metal material |
| CN105779770A (en) * | 2016-03-10 | 2016-07-20 | 中南大学 | Method for recycling valuable metal in waste circuit board |
| CN106167854A (en) * | 2015-09-29 | 2016-11-30 | 天津理工大学 | A kind of recovery metallic lead and method producing waterglass from useless lead bearing glass |
-
2017
- 2017-04-01 CN CN201710212578.7A patent/CN107142376A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS575829A (en) * | 1980-06-14 | 1982-01-12 | Dowa Mining Co Ltd | Separating and recovering method for tin in lead refining process |
| US5108497A (en) * | 1990-09-05 | 1992-04-28 | Indium Corporation Of America | Treatment of indium dusts |
| CN101724753A (en) * | 2009-12-28 | 2010-06-09 | 中南大学 | Low-temperature alkaline lead-smelting method |
| CN102080158A (en) * | 2010-12-30 | 2011-06-01 | 郴州市金贵银业股份有限公司 | Pyrogenic attack comprehensive recovery process for lead and silver slag leached from bismuth oxide slag |
| CN102586584A (en) * | 2012-04-01 | 2012-07-18 | 大冶有色金属有限责任公司 | Method for selectively separating valuable metals from complex lead-containing precious metal material |
| CN106167854A (en) * | 2015-09-29 | 2016-11-30 | 天津理工大学 | A kind of recovery metallic lead and method producing waterglass from useless lead bearing glass |
| CN105779770A (en) * | 2016-03-10 | 2016-07-20 | 中南大学 | Method for recycling valuable metal in waste circuit board |
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