CN101956080A - Method for quickly recovering metallic silver from silver ion-containing waste liquid - Google Patents
Method for quickly recovering metallic silver from silver ion-containing waste liquid Download PDFInfo
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- CN101956080A CN101956080A CN2010102838674A CN201010283867A CN101956080A CN 101956080 A CN101956080 A CN 101956080A CN 2010102838674 A CN2010102838674 A CN 2010102838674A CN 201010283867 A CN201010283867 A CN 201010283867A CN 101956080 A CN101956080 A CN 101956080A
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- waste liquid
- precipitation
- argent
- silver
- silver ions
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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 relates to a method for recovering metallic silver, in particular to the method for quickly recovering the metallic silver from silver ion-containing waste liquid. The method comprises the following steps of: (1) introducing the silver ion-containing waste liquid into a precipitation tank which contains Cl<-> ion-containing solution; and discharging liquid supernatant after precipitating to obtain precipitate; (2) separating the obtained precipitate in alkali solution to obtain a solid-state separated matter; and (3) melting the solid-state separated matter at the high temperature of between 1,000 and 1,150DEG C; discharging oxygen; and finally obtaining the metallic silver. The method has the characteristics of simple and convenient operation, low recovery cost and convenient popularization.
Description
Technical field
The present invention relates to a kind of method that reclaims argent, particularly from contain the silver ions waste liquid, reclaim the method for argent fast.
Background technology
In the waste liquid of each laboratory discharging, often there is argentiferous ionic waste liquid to be discharged, cause the waste of noble metal, and along with the raising year by year of environmental protection of enterprise consciousness in recent years, all discharging waste liquids need after treatment qualified discharge.So be badly in need of a kind of simple and easy, handle the method that silver-containing liquid waste reclaims argent fast.At present, several below the method for recovery silver mainly contains from silver-containing liquid waste:
1, zinc reduction: this is the method that generally adopts, but yield is lower, and reaction is slow.
2, acidic treatment: this method reaction is fast, but transformation efficiency is low.
3, high temperature reduction method: required condition harshness, current consumption is big, is difficult for promoting.
4, electrolytic process:, handle silver-plated waste liquid and often adopt pulsed electrical solution and fluidized-bed electrolytic process for silver-plated manufacturer.Used the rotating cathode electrolytic process abroad.This method facility investment height, technical sophistication is not easy to promote.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of method that from contain the silver ions waste liquid, reclaims argent fast, it is easy and simple to handle, and cost recovery is low, is convenient to promote.
The present invention includes the following step: (1), argentiferous ionic waste liquid fed contain Cl
-In the settling bath of ion solution, post precipitation is discharged supernatant liquor, gets throw out; (2), the gained throw out poured in the strong base solution separates, solid-state isolate; (3), with the solid-state isolate of gained at 1000-1150 ℃ of high-temperature fusion isolate, oxygen is discharged, and finally obtains argent.
Contain Cl in described (1) step
-The silver ions that the ionic amount will be sufficient in the waste liquid generates silver nitride precipitation; Determination methods is: get the inspection of supernatant drop hydrochloric acid, there have precipitation to illustrate that then sodium-chlor adds to be not enough, still need add again; Do not have precipitation and then can carry out next step.
The silver ions that the amount of the hydroxide ion of strong base solution will be sufficient in the waste liquid in described (2) step generates the silver hydroxide precipitation; Determination methods is: get the inspection of supernatant drop alkali lye, there have precipitation to illustrate that then strong base solution adds to be not enough, still need add again; Do not have precipitation and then can carry out next step.
Described Cl
-Ion solution is a NaCl solution.
Described highly basic is that NaOH is or/and KOH.
The settling bath in described (1) step is on-line continuous settling bath or independent settling bath.
Technological operation of the present invention is simple, and danger coefficient is low, consumes lowly, and cost recovery is low, the argent high purity of recovery.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
The present invention includes the following step: in (1), the settling bath with argentiferous ionic waste liquid feeding NaCl solution, post precipitation is discharged supernatant liquor, gets throw out.The silver ions that the amount of NaCl solution will be sufficient in the waste liquid generates silver nitride precipitation; Determination methods is: get the inspection of supernatant drop hydrochloric acid, there have precipitation to illustrate that then sodium-chlor adds to be not enough, still need add again; Do not have precipitation and then can carry out next step.(2), the gained throw out poured in the NaOH solution separates, solid-state isolate.The silver ions that the amount of the hydroxide ion of NaOH solution will be sufficient in the waste liquid generates the silver hydroxide precipitation; Determination methods is: get the inspection of supernatant drop alkali lye, there have precipitation to illustrate that then NaOH solution adds to be not enough, still need add again; Do not have precipitation and then can carry out next step.(3), with the solid-state isolate of gained at 1000-1150 ℃ of high-temperature fusion isolate, oxygen is discharged, and finally obtains argent.
The settling bath in described (1) step is on-line continuous settling bath or independent settling bath.
Claims (6)
1. a method that reclaims argent from contain the silver ions waste liquid fast is characterized in that: comprise the following steps: (1), argentiferous ionic waste liquid fed contain Cl
-In the settling bath of ion solution, post precipitation is discharged supernatant liquor, gets throw out; (2), the gained throw out poured in the strong base solution separates, solid-state isolate; (3), with the solid-state isolate of gained at 1000-1150 ℃ of high-temperature fusion isolate, oxygen is discharged, and finally obtains argent.
2. the method that reclaims argent from contain the silver ions waste liquid fast according to claim 1, it is characterized in that: described step contains Cl in (1)
-The silver ions that the ionic amount will be sufficient in the waste liquid generates silver nitride precipitation; Determination methods is: get the inspection of supernatant drop hydrochloric acid, there have precipitation to illustrate that then sodium-chlor adds to be not enough, still need add again; Do not have precipitation and then can carry out next step.
3. the method that reclaims argent from contain the silver ions waste liquid fast according to claim 1 is characterized in that: the silver ions that the amount of the hydroxide ion of strong base solution will be sufficient in the waste liquid in the described step (2) generates the silver hydroxide precipitation; Determination methods is: get the inspection of supernatant drop alkali lye, there have precipitation to illustrate that then strong base solution adds to be not enough, still need add again; Do not have precipitation and then can carry out next step.
4. the method that reclaims argent from contain the silver ions waste liquid fast according to claim 1 and 2 is characterized in that: described Cl
-Ion solution is a NaCl solution.
5. according to claim 1 or the 3 described methods that reclaim argent from contain the silver ions waste liquid fast, it is characterized in that: described highly basic is that NaOH is or/and KOH.
6. the method that reclaims argent from contain the silver ions waste liquid fast according to claim 1, it is characterized in that: the settling bath of described step (1) is on-line continuous settling bath or independent settling bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102838674A CN101956080A (en) | 2010-09-15 | 2010-09-15 | Method for quickly recovering metallic silver from silver ion-containing waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102838674A CN101956080A (en) | 2010-09-15 | 2010-09-15 | Method for quickly recovering metallic silver from silver ion-containing waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101956080A true CN101956080A (en) | 2011-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102838674A Pending CN101956080A (en) | 2010-09-15 | 2010-09-15 | Method for quickly recovering metallic silver from silver ion-containing waste liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN101956080A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263948A (en) * | 2014-10-16 | 2015-01-07 | 云南驰宏锌锗股份有限公司 | Method for recovering sliver from silver-bearing waste liquor |
| CN109355513A (en) * | 2018-12-17 | 2019-02-19 | 河南理工大学 | A kind of closed cycle recovery process of propine silver catalyst waste liquid |
-
2010
- 2010-09-15 CN CN2010102838674A patent/CN101956080A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263948A (en) * | 2014-10-16 | 2015-01-07 | 云南驰宏锌锗股份有限公司 | Method for recovering sliver from silver-bearing waste liquor |
| CN109355513A (en) * | 2018-12-17 | 2019-02-19 | 河南理工大学 | A kind of closed cycle recovery process of propine silver catalyst waste liquid |
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Application publication date: 20110126 |