CN108018431B - The recovery method of valuable metal in a kind of silver-zine slag - Google Patents
The recovery method of valuable metal in a kind of silver-zine slag Download PDFInfo
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- CN108018431B CN108018431B CN201711350254.6A CN201711350254A CN108018431B CN 108018431 B CN108018431 B CN 108018431B CN 201711350254 A CN201711350254 A CN 201711350254A CN 108018431 B CN108018431 B CN 108018431B
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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
- C22B7/04—Working-up slag
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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
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/044—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
- C22B13/04—Obtaining lead by wet processes
- C22B13/045—Recovery from waste materials
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/10—Hydrochloric acid, other halogenated acids or salts thereof
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
- C22B3/46—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
-
- 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
-
- 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
-
- 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
- C22B7/007—Wet processes by acid leaching
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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
Abstract
The invention discloses a kind of recovery methods of valuable metal in silver-zine slag to aoxidize heavy lead by vacuum distillation, neutralizes heavy bismuth, neutralizes heavy zinc, displacement proposes this five step of bismuth.The present invention Oxidation Leaching and neutralizes heavy zinc at normal temperature, reduces the consumption of steam, improves operating efficiency, using vacuum distillation and wet method combined processing, it is compared with the traditional method, treatment process is simple and clear, and Process configuration is reasonable, thoroughly, the rate of recovery is relatively high, good in economic efficiency for metal separation.
Description
Technical field
The invention belongs to smelting field of nonferrous metal, and in particular to the recovery method of valuable metal in a kind of silver-zine slag.
Background technique
The intermediate products of zincification desilver when silver-zinc crust is pyro-refining lead or bismuth, since zinc can be formed with metals such as gold, silver
A series of infusible compounds, these compounds are almost not dissolved in bismuth liquid, and density is small compared with bismuth, therefore metal is added into bismuth liquid
Zinc, the copper in bismuth liquid and gold, silver form insoluble compound with zinc, float on bismuth liquid surface, i.e. silver-zine slag, are Comprehensive Recovery of Ag bismuths
Raw material.Argentiferous bismuth is higher in silver-zine slag, general argentiferous 1-10%, and the content of bismuth is greater than 50%, in addition containing some zinc, copper,
Lead and a small amount of gold etc. have very high comprehensive utilization value.The processing method of silver-zine slag generally has: 1, directly returning and work as ingredient
It utilizes；2, silver-zine slag pyrogenic attack；3, Whote-wet method extract technology.Pyrogenic attack disadvantage be complicated for operation, metal recovery rate is low,
After environmental pollution is serious and zinc brings silver converter into, it is degrading the working of a furnace, increases the viscosity of shoddye, to increase the loss of silver.Entirely
Wet process is usually that initial oxidation leaches separation of Bismuth and other base metals, and gold and silver are enriched in slag, then pass through wet-treating.This processing
Mode, which has, leaches silver-zine slag using nitric acid, the disadvantage is that acid consumption is big, severe operational environment and seriously pollution environment, bismuth nitrate into
Entering electrolyte influences the quality of electrolytic silver.
Application number 201310609901.6 discloses a kind of method for recycling valuable metal in silver-zine slag, it is characterized in that using
NaClO3- NaCl-HCl system carries out Oxidation Leaching to silver-zine slag, and silver-zine slag leaches using pre- leaching, leaches two sections of counterflow leachings
Technique.The base metals such as bismuth, zinc enter in solution, obtain chlorine oxygen bismuth with hydrolytic precipitation, liquor zinci chloridi and soda ash precipitate to obtain alkali
Formula zinc carbonate；And gold and silver are enriched in slag, are further extracted.The disadvantages of this method is: leaching is in heating environment
It carries out, and the valuable metal in silver-zine slag cannot be carried out to substep separation, silver metal enters to be carried out separating again being not thorough after slag phase.
Application number 201110086563.3 disclose Zhou Song et al. disclose it is a kind of recycled from noble metal smelting slag it is valuable
Silver-zinc crust is carried out vacuum distillation processing, obtains richness by the technique (invention patent mandate CN102703719B) of metal, the technique
Kirsite containing noble metal, then blown to obtain electrum again, carries out electrolysis to electrum and gold and silver is separately recovered.This technique
Silver-zinc crust is handled using traditional vacuum distillation method, then turns the valuable metals such as traditional pyrometallurgical smelting recycling gold, silver, zinc, exists
The disadvantages of process flow is complicated, high production cost, metal recovery rate.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of recovery method of valuable metal in silver-zine slag.
The present invention provides a kind of recovery method of valuable metal in silver-zine slag, includes the following steps:
A) be evaporated in vacuo: by silver-zine slag under 10-20Pa vacuum degree, at a temperature of 910-940 DEG C, vacuum distillation obtains thick silver
With zinc bismuth alloy；
B) aoxidize heavy lead: thick galactic longitude crosses processing and obtains silver products, and zinc bismuth alloy hydrochloric acid and dioxygen water mixed liquid carry out oxygen
Change and leach, filtrate 1 and filter residue 1 is obtained by filtration in normal-temperature reaction, and the processing of filter residue 1 obtains lead, the volume matter of mixed liquor and zinc bismuth alloy
Amount is than being 4-6mL:1g；
C) neutralize heavy bismuth: filtrate 1 adjusts pH value 3-4 with lye, and after hydrolysis, filtrate 2 and filter residue 2 is obtained by filtration；
D) it neutralizes heavy zinc: into filtrate 2 plus lye adjusting pH value 7-8, after hydrolysis, filtrate 3 and filter residue is obtained by filtration
3, lye is matched in 3 reuse of filtrate, and the processing of filter residue 3 obtains zinc；
E) displacement mentions bismuth: the hydrochloric acid solution that concentration is 20% of filter residue 2 dissolves, and iron replacement is then added and reacts to obtain sea
The volume mass ratio of continuous bismuth, hydrochloric acid solution and filter residue 2 is 5mL:1g.
Preferably, silver-zine slag described in step a) includes the substance of following weight percent content: Bi60-80%, Ag3-
6%, Zn10-20%, Pb1-5%.
Preferably, the time of vacuum distillation described in step a) is 1.5-2.5h.
Preferably, mixed liquor described in step b) is 20% hydrochloric acid solution and 30% hydrogen peroxide solution with volume ratio 3:
1 mixes.
Preferably, the temperature of hydrolysis described in step c) is 60-70 DEG C.
Preferably, hydrolysis time described in step d) is 1-1.5h.
Preferably, lye described in step c) and step d) is sodium hydroxide solution.
Preferably, step b), c) and d) described in be filtered into filters pressing.
Preferably, the additional amount of iron powder described in step e) is 1-1.2 times of theoretical amount.
The beneficial effects of the present invention are:
1, the purity is high of slag charge: silver content 94-96% in silver-colored slag, bi content 97.5-98.4% in sponge bismuth, slag charge purity
Height be conducive to improve metal recovery rate, last metallic silver, bismuth, lead the rate of recovery respectively reach 95%, 91%, 94% or more.
2, Oxidation Leaching at normal temperature of the invention and the heavy zinc of neutralization, reduce the consumption of steam, improve operating efficiency.
3, the present invention is compared with the traditional method using vacuum distillation and wet method combined processing, and treatment process is simple and clear,
Process configuration is reasonable, and thoroughly, the rate of recovery is relatively high for metal separation, good in economic efficiency, makees oxidant with hydrogen peroxide, reaction speed is fast
And do not bring other impurity into, the bismuth purity obtained with iron replacement bismuth is preferable, and direct yield is high and production cost is low.
The main component of silver-zine slag of the present invention is bismuth, silver, zinc, lead, and the overwhelming majority is that reduction-state exists.Vacuum distillation
Metal and alloy it is basic according to being the different vapour pressure of each metal gas, the atom of each element when being coexisted due to each element, point
Interaction force between son influences the actual vapor of each element, and then influences to distill isolated effect.In temperature 910~940
DEG C when, in the case that vacuum degree is little, bismuth, zinc are easy to volatilize, and silver it is almost non-volatile, can achieve the effect of separation.?
To zinc bismuth alloy HCl+H2O2Mixed liquor dissolves to obtain zinc chloride and bismuth chloride solution, and metal chloride is because in hydrochloric acid solution
In different solubility, the initial gross separation of metal can be realized by filters pressing, and zinc bismuth alloy nubbin lead is with precipitation of lead chloride
Form enter in slag.
BiCl in solution3、ZnCl2It with the raising of pH value, then can hydrolyze, react as follows:
BiCl3+ 2NaOH=BiOCl ↓+2NaCl+2H2O
ZnCl2+ 2NaOH=Zn (OH)2↓+2NaCl
BiOCl passes through diluted hydrochloric acid dissolution, adds iron powder and displacement reaction then occurs, then react as follows:
BiOCl+2HCl=BiCl3+H2O
2BiCl3+ 3Fe=3FeCl2+2Bi↓
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Technical solution of the present invention is clearly and completely described in attached drawing.
Embodiment 1
Process flow chart is as shown in Figure 1, the specific steps are as follows:
A) it is evaporated in vacuo: taking the silver-zine slag of 1000Kg, wherein Bi71.3%, Ag3.8%, Zn11.8%, Pb1.7%, send
Distilled to vacuum drying oven, vacuum degree is maintained at 15Pa, 920 DEG C at a temperature of keep the temperature 2h, obtain thick silver and zinc bismuth alloy, thick silver oxygen
Casting Ag positive plate send silver-colored electrolysis after changing blowing.
B) heavy lead: zinc bismuth alloy HCl and H is aoxidized2O2Mixed liquor carries out Oxidation Leaching, the body of mixed liquor and zinc bismuth alloy
Product mass ratio is 4mL:1g；The mixed liquor of 4mL, normal-temperature reaction 1.5h are added i.e. in 1g silver-zine slag, filters pressing obtains filtrate 1 and filter residue
1, filter residue 1 (predominantly lead chloride) returns to lead system and extracts lead.
C) neutralize heavy bismuth: filtrate 1 is added sodium hydroxide solution and adjusts pH value 3,65 DEG C of temperature, reacts 1h, hydrolyzes bismuth, presses
Filter obtains filtrate 2 and filter residue 2 (predominantly chlorine oxygen bismuth).
D) it neutralizes heavy zinc: sodium hydroxide solution being added into filtrate 2, control the pH=7 in solution, reaction 1.5h is filtered
Lye is matched in slag 3 (predominantly zinc hydroxide precipitation) and filtrate 3,3 reuse of filtrate, and filter residue 3 carries out processing and extracts zinc.
E) displacement mentions bismuth: the hydrochloric acid solution that concentration is 20% of filter residue 2 dissolves, the volume mass of hydrochloric acid solution and filter residue 2
Than for 5mL:1g.Then the iron powder of 1 times of theoretical amount needed for displacement bismuth is added, reacts 2h, and filters pressing obtains sponge bismuth.
Embodiment 2
A) it is evaporated in vacuo: taking the silver-zine slag of 1000Kg, wherein Bi69.3%, Ag4.2%, Zn13.1%, Pb1.2%, send
Distilled to vacuum drying oven, vacuum degree is maintained at 20Pa, 940 DEG C at a temperature of keep the temperature 2.5h, obtain thick silver and zinc bismuth alloy, thick silver
Casting Ag positive plate send silver-colored electrolysis after oxidation blowing.
B) heavy lead: zinc bismuth alloy HCl and H is aoxidized2O2Mixed liquor carries out Oxidation Leaching, the body of mixed liquor and zinc bismuth alloy
Product mass ratio is 5mL:1g；The mixed liquor of 5mL, normal-temperature reaction 2h are added i.e. in 1g silver-zine slag, filters pressing obtains filtrate 1 and filter residue 1,
Filter residue 1 (predominantly lead chloride) returns to lead system and extracts lead.
C) neutralize heavy bismuth: filtrate 1 is added sodium hydroxide solution and adjusts pH value 3.5, and temperature 70 C reacts 1h, hydrolyzes bismuth,
Filters pressing obtains filtrate 2 and filter residue 2 (predominantly chlorine oxygen bismuth).
D) it neutralizes heavy zinc: sodium hydroxide solution being added into filtrate 2, control the pH=7.5 in solution, reaction 1h is filtered
Lye is matched in slag 3 (predominantly zinc hydroxide precipitation) and filtrate 3,3 reuse of filtrate, and filter residue 3 carries out processing and extracts zinc.
E) displacement mentions bismuth: the hydrochloric acid solution that concentration is 20% of filter residue 2 dissolves, the volume mass of hydrochloric acid solution and filter residue 2
Than for 5mL:1g.Then the iron powder of 1.1 times of theoretical amounts needed for displacement bismuth is added, reacts 2.5h, and filters pressing obtains sponge bismuth.
Embodiment 3
A) it is evaporated in vacuo: taking the silver-zine slag of 1000Kg, wherein Bi76.8%, Ag4.0%, Zn14.8%, Pb3.2%, send
Distilled to vacuum drying oven, vacuum degree is maintained at 10Pa, 910 DEG C at a temperature of keep the temperature 1.5h, obtain thick silver and zinc bismuth alloy, thick silver
Casting Ag positive plate send silver-colored electrolysis after oxidation blowing.
B) heavy lead: zinc bismuth alloy HCl and H is aoxidized2O2Mixed liquor carries out Oxidation Leaching, the body of mixed liquor and zinc bismuth alloy
Product mass ratio is 6mL:1g；The mixed liquor of 6mL, normal-temperature reaction 1h are added i.e. in 1g silver-zine slag, filters pressing obtains filtrate 1 and filter residue 1,
Filter residue 1 (predominantly lead chloride) returns to lead system and extracts lead.
C) neutralize heavy bismuth: filtrate 1 is added sodium hydroxide solution and adjusts pH value 4, and temperature 60 C reacts 1.5h, hydrolyzes bismuth,
Filters pressing obtains filtrate 2 and filter residue 2 (predominantly chlorine oxygen bismuth).
D) it neutralizes heavy zinc: ammonium hydroxide being added into filtrate 2, control the pH=8 in solution, reaction 1h obtains filter residue 3 (predominantly
Zinc hydroxide precipitation) and filtrate 3, with lye, filter residue 3 carries out processing and extracts zinc 3 reuse of filtrate.
E) displacement mentions bismuth: the hydrochloric acid solution that concentration is 20% of filter residue 2 dissolves, the volume mass of hydrochloric acid solution and filter residue 2
Than for 5mL:1g.Then the iron powder of 1.2 times of theoretical amounts needed for displacement bismuth is added, reacts 1h, and filters pressing obtains sponge bismuth.
Comparative example 1
(1) silver-zine slag of 1000Kg is taken, wherein Bi74.5%, Ag5.2%, Zn16.6%, Pb4.2%, using NaClO3-
NaCl-HCl system is leached, and reaction temperature control is at 70 DEG C, liquid-solid ratio 4:1, NaClO3Dosage is 10g/L, NaCl dosage
For 20g/L, HCl dosage is 80mL/L.After silver-zine slag reacts 4h, leachate and filter residue are collected in supernatant filtering respectively.
(2) after leaching liquid adjusts its pH value to 2.5 stirring at normal temperature 1h with sodium hydroxide solution simultaneously, supernatant is placed
Filtering obtains chlorine oxygen bismuth filter residue and liquor zinci chloridi that bismuth-containing is 54.37%；Liquor zinci chloridi is adjusted into its pH value with soda ash again
To 6, supernatant is filtered after 1h is stirred to react at a temperature of 40 DEG C, obtains basic zinc carbonate and waste liquid；
(3) filter residue in step (1) is further extracted into gold and silver；Waste liquid obtains Nacl by evaporative crystallization in step (2),
Return again to leaching process, and mother liquid recycling.
Using method of the invention from the rate of recovery and each regulus for recycling each metal in silver-zine slag tenor with
The process ration used in comparative example 1 such as the following table 1.
In 1 silver-zine slag of table in each recovery rate of valuable metals and each regulus tenor comparison
It can be seen that from data in upper table using each metal in method recycling silver-zine slag of the invention, the purity is high of slag charge,
Being conducive to improve metal recovery rate, the rate of recovery of each metal has all reached 90% or more, compared with comparative example, the recycling of silver and zinc
Rate greatly improves.
Claims (8)
1. the recovery method of valuable metal in a kind of silver-zine slag, which is characterized in that include the following steps:
A) be evaporated in vacuo: by silver-zine slag under 10-20Pa vacuum degree, at a temperature of 910-940 DEG C, vacuum distillation obtains thick silver and zinc
Bismuth alloy；
B) aoxidize heavy lead: thick galactic longitude crosses processing and obtains silver products, and zinc bismuth alloy hydrochloric acid and dioxygen water mixed liquid carry out oxidation leaching
Out, normal-temperature reaction, is obtained by filtration filtrate 1 and filter residue 1, and the processing of filter residue 1 obtains lead, hydrochloric acid solution that the mixed liquor is 20% and
30% hydrogen peroxide solution is mixed with volume ratio 3:1, and the volume mass ratio of mixed liquor and zinc bismuth alloy is 4-6mL:1g；
C) neutralize heavy bismuth: filtrate 1 adjusts pH value 3-4 with lye, and after hydrolysis, filtrate 2 and filter residue 2 is obtained by filtration；
D) neutralize heavy zinc: into filtrate 2 plus lye adjusts pH value 7-8, after hydrolysis, filtrate 3 and filter residue 3 is obtained by filtration, filter
Lye is matched in 3 reuse of liquid, and the processing of filter residue 3 obtains zinc；
E) displacement mentions bismuth: the hydrochloric acid solution that concentration is 20% of filter residue 2 dissolves, and iron replacement is then added and reacts to obtain sponge
The volume mass ratio of bismuth, hydrochloric acid solution and filter residue 2 is 5mL:1g.
2. the recovery method of valuable metal in silver-zine slag as described in claim 1, which is characterized in that silver-colored zinc described in step a)
Cinder ladle includes the substance of following weight percent content: Bi60-80%, Ag3-6%, Zn10-20%, Pb1-5%.
3. the recovery method of valuable metal in silver-zine slag as described in claim 1, which is characterized in that vacuum described in step a)
The time of distillation is 1.5-2.5h.
4. the recovery method of valuable metal in silver-zine slag as described in claim 1, which is characterized in that hydrolyzed described in step c)
The temperature of reaction is 60-70 DEG C.
5. the recovery method of valuable metal in silver-zine slag according to any one of claims 1-4, which is characterized in that in step d)
The hydrolysis time is 1-1.5h.
6. the recovery method of valuable metal in silver-zine slag according to any one of claims 1-4, which is characterized in that step c) and
Lye described in step d) is sodium hydroxide solution.
7. the recovery method of valuable metal in silver-zine slag according to any one of claims 1-4, which is characterized in that step b),
C) filters pressing is filtered into described in and d).
8. the recovery method of valuable metal in silver-zine slag according to any one of claims 1-4, which is characterized in that in step e)
The additional amount of the iron powder is 1-1.2 times of theoretical amount.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU650471B2 (en) * | 1990-07-27 | 1994-06-23 | Mount Isa Mines Limited | Method of extracting valuable metals from leach residues |
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| CN102162035A (en) * | 2011-04-07 | 2011-08-24 | 赵志强 | Vacuum distillation process for extracting silver from silver zinc slag |
| CN102304621A (en) * | 2011-09-30 | 2012-01-04 | 湖南金旺铋业股份有限公司 | Process for separating out Sn, Bi, Cu and Zn from Sn-Bi waste material |
| CN103589873B (en) * | 2013-11-27 | 2016-02-10 | 郴州市金贵银业股份有限公司 | A kind of method of valuable metal in recover silver cadmia |
| CN104278157B (en) * | 2014-10-29 | 2016-08-17 | 湖南宇腾有色金属股份有限公司 | A kind of method of silver-zine slag wet underwater welding valuable metal |
| CN106011474B (en) * | 2016-05-24 | 2018-01-23 | 郴州市金贵银业股份有限公司 | A kind of method of wet method synthetical recovery silver-zinc crust |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU650471B2 (en) * | 1990-07-27 | 1994-06-23 | Mount Isa Mines Limited | Method of extracting valuable metals from leach residues |
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