CN101824549A - Method for improving purity of zinc ingot by filtering waste electrolyte - Google Patents
Method for improving purity of zinc ingot by filtering waste electrolyte Download PDFInfo
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- CN101824549A CN101824549A CN201010169620A CN201010169620A CN101824549A CN 101824549 A CN101824549 A CN 101824549A CN 201010169620 A CN201010169620 A CN 201010169620A CN 201010169620 A CN201010169620 A CN 201010169620A CN 101824549 A CN101824549 A CN 101824549A
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- waste electrolyte
- zinc
- electrolyzer
- purity
- electrolyte
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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 method for improving the purity of a zinc ingot by filtering waste electrolyte, comprising the following steps of: returning electrolyzed waste electrolyte to an electrolytic bath for continuing electrolyzing when the zinc content in the waste electrolyte is high; filtering part or all of the electrolyte returning to the electrolytic bath; and filtering out suspended impurities in the waste electrolyte. The invention overcomes the influence of suspended matters in the electrolyte on lead content of a zinc sheet, improves the purity and the quality of the zinc ingot, lowers the viscosity of the electrolyte, improves the purity of the electrolyte, and creates conditions for lowering the power consumption, filtering, rewashing refuse and improving the recovery rate of zinc metals.
Description
Technical field
The present invention relates to the non-ferrous metal metallurgy technical field, especially relate to a kind of method that waste electrolyte improves purity of zinc ingot of filtering.
Background technology
The vanadium settling iron-removing wet zinc smelting method of prior art, mainly comprise neutral leachings, low temperature pre-neutralization, the leaching of high temperature peracid, low pollution vanadium settling iron-removing, contain zinc lixiviating solution by electrolysis separate out zinc metal sheet, again through melting production zinc ingot metal.In electrolytic process, waste electrolyte constantly turns back in the electrolyzer according to the height of its zinc content.The content height of lead in the zinc metal sheet that this production technique production obtains, thus cause the zinc ingot metal quality percentage low; There is a large amount of suspended substances to influence electrolytic efficiency in the electrolytic solution simultaneously, reduces the utilization ratio of electric power energy.
Source plumbous in the zinc metal sheet has: 1, Pb
2+In negative plate, separate out Pb
2++ 2e=Pb; 2, PbO in the suspended substance
2And PbSO
4Mechanical attachment is on negative plate.PbO in the suspended substance wherein
2And PbSO
4Mechanical attachment is to cause the leaded high major cause of zinc metal sheet on negative plate.
PbO
2And PbSO
4And a large amount of MnO
2The generation reason that constitutes suspended substance in the electrolytic solution with excessive Strontium carbonate powder is: 1, the separating out of mn ion on positive plate, chemical equation is Mn
2++ 2H
2O-2e=4H
++ MnO
2↓; 2, the excessive adding and the PbO of Strontium carbonate powder
2And PbSO
4Absorption.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, the method that a kind of technology is simple, utilization rate of electrical is high, the measured filtration waste electrolyte of zinc ingot metal matter improves purity of zinc ingot is provided.
The object of the present invention is achieved like this: a kind of method of filtering waste electrolyte raising purity of zinc ingot, it is characterized in that: the electrolytic waste electrolyte zinc content of process turns back to when high and continues electrolysis in the electrolyzer, the electrolytic solution that turns back in the electrolyzer partly or entirely passes through filtration step, the suspended contamination in the filtering waste electrolyte.
The further concrete scheme of method of the present invention is that it comprises the steps:
(1) in electrolyzer, adds new electrolytic solution according to its capacity and waste electrolyte output;
(2) in electrolyzer, add Strontium carbonate powder as required;
Turn back to when (3) the electrolytic waste electrolyte zinc content of process is high and continue electrolysis in the electrolyzer, the electrolytic solution that turns back in the electrolyzer partly or entirely passes through filtration step, the suspended contamination in the filtering waste electrolyte;
Send the extract technology utilization when (4) hanging down through electrolytic waste electrolyte zinc content.
Described filtration step adopts pressure filter to filter, and the filter-press residues discharging is stored up, and the pressing filtering liquid zinc content is with ZnSO
4: H
2SO
4Ratio 2.8～3.2 be threshold value, as pressing filtering liquid ZnSO
4: H
2SO
4Ratio during greater than threshold value, turn back to and continue electrolysis in the electrolyzer, work as ZnSO
4: H
2SO
4Ratio send the extract technology utilization during less than threshold value.
Described Strontium carbonate powder add-on is that zinc per ton adds 3～5kg.
For new electrolytic solution that enters electrolyzer and the waste electrolyte that returns are mixed, new electrolytic solution and the waste electrolyte that returns will join in the electrolyzer through behind the electrolytic solution tempering tank thorough mixing.
The waste electrolyte of process filtration step is also through a process of cooling, and this process of cooling is by the air cooling tower cooler.
Major advantage of the present invention is: at first this technology has successfully solved electrolyte suspension to the plumbiferous influence of zinc metal sheet, makes the leaded reduction of electrolytic solution more than 50%, has improved purity of zinc ingot and quality.Secondly this technology has also reduced electrolytic solution viscosity, has improved electrolytic solution purity, has guaranteed that advantageously the electrolysis zinc metal sheet separates out, and has reduced the electrolytic solution volts lost, is to reduce power consumption, filters washery slag and improves the zinc metal recovery rate and created condition.
Description of drawings
Fig. 1 is that the present invention filters the method process flow sheet that waste electrolyte improves purity of zinc ingot.
Embodiment
The present invention is described in more detail below in conjunction with process flow sheet and specific embodiment.
Embodiment 1: as shown in Figure 1, the equipment that present method is used comprises electrolytic solution tempering tank, electrolyzer, pressure filter and atmospheric cooling tower.
A kind of method of filtering waste electrolyte raising purity of zinc ingot, it comprises the steps:
(1) in electrolyzer according to its capacity and waste electrolyte output, by adding new electrolytic solution behind the electrolytic solution tempering tank thorough mixing;
(2) add Strontium carbonate powder in electrolyzer, additional proportion is that zinc per ton adds Strontium carbonate powder 4kg;
Turn back to when (3) the electrolytic waste electrolyte zinc content of process is high and continue electrolysis in the electrolyzer, the electrolytic solution that turns back in the electrolyzer partly or entirely passes through filtration step, the suspended contamination in the filtering waste electrolyte; Described filtration step adopts pressure filter to filter, and the filter-press residues discharging is stored up, and the pressing filtering liquid zinc content is with ZnSO
4: H
2SO
4Ratio 3 be threshold value, as pressing filtering liquid ZnSO
4: H
2SO
4Ratio during greater than threshold value, continue electrolysis in the electrolyzer by turning back to behind air cooling tower cooler, the electrolytic solution tempering tank thorough mixing, work as ZnSO
4: H
2SO
4Ratio send the leaching operation during less than threshold value;
Send the extract technology utilization when (4) hanging down through electrolytic waste electrolyte zinc content.
Embodiment 2: other step is all identical, and different is to adopt the ratio 2.8 of ZnSO4: H2SO4 to be threshold value; Add Strontium carbonate powder in electrolyzer, additional proportion is that zinc per ton adds Strontium carbonate powder 3kg.
Embodiment 3: other step is all identical, and different is to adopt the ratio 3.2 of ZnSO4: H2SO4 to be threshold value; Add Strontium carbonate powder in electrolyzer, additional proportion is that zinc per ton adds Strontium carbonate powder 5kg.
Claims (7)
1. one kind is filtered the method that waste electrolyte improves purity of zinc ingot, it is characterized in that: the electrolytic waste electrolyte zinc content of process turns back to when high and continues electrolysis in the electrolyzer, the electrolytic solution that turns back in the electrolyzer partly or entirely passes through filtration step, the suspended contamination in the filtering waste electrolyte.
2. improve the method for purity of zinc ingot according to the described filtration waste electrolyte of claim 1, it is characterized in that: it comprises the steps:
(1) in electrolyzer, adds new electrolytic solution according to its capacity and waste electrolyte output;
(2) in electrolyzer, add Strontium carbonate powder as required;
Turn back to when (3) the electrolytic waste electrolyte zinc content of process is high and continue electrolysis in the electrolyzer, the electrolytic solution that turns back in the electrolyzer partly or entirely passes through filtration step, the suspended contamination in the filtering waste electrolyte;
Send the extract technology utilization when (4) hanging down through electrolytic waste electrolyte zinc content.
3. improve the method for purity of zinc ingot according to the described filtration waste electrolyte of claim 2, it is characterized in that: described filtration step adopts pressure filter to filter, and the filter-press residues discharging is stored up, and the pressing filtering liquid zinc content is with ZnSO
4: H
2SO
4Ratio 2.8～3.2 be threshold value, as pressing filtering liquid ZnSO
4: H
2SO
4Ratio during greater than threshold value, turn back to and continue electrolysis in the electrolyzer, work as ZnSO
4: H
2SO
4Ratio send the leaching operation during less than threshold value.
4. improve the method for purity of zinc ingot according to the described filtration waste electrolyte of claim 3, it is characterized in that: described Strontium carbonate powder add-on is that zinc per ton adds 3～5kg.
5. improve the method for purity of zinc ingot according to claim 1,2,3 or 4 described filtration waste electrolytes, it is characterized in that: new electrolytic solution and the waste electrolyte that returns will join in the electrolyzer through behind the electrolytic solution tempering tank thorough mixing.
6. improve the method for purity of zinc ingot according to claim 1,2,3 or 4 described filtration waste electrolytes, it is characterized in that: the waste electrolyte of process filtration step is also through a process of cooling, and this process of cooling is by the air cooling tower cooler.
7. improve the method for purity of zinc ingot according to the described filtration waste electrolyte of claim 5, it is characterized in that: the waste electrolyte of process filtration step is also through a process of cooling, and this process of cooling is by the air cooling tower cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010169620A CN101824549A (en) | 2010-04-15 | 2010-04-15 | Method for improving purity of zinc ingot by filtering waste electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010169620A CN101824549A (en) | 2010-04-15 | 2010-04-15 | Method for improving purity of zinc ingot by filtering waste electrolyte |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101824549A true CN101824549A (en) | 2010-09-08 |
Family
ID=42688712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010169620A Pending CN101824549A (en) | 2010-04-15 | 2010-04-15 | Method for improving purity of zinc ingot by filtering waste electrolyte |
Country Status (1)
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| CN (1) | CN101824549A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568317A (en) * | 2015-12-31 | 2016-05-11 | 株洲冶炼集团股份有限公司 | High-grade zinc electrolysis preparing method and application thereof |
| CN109368688A (en) * | 2018-12-20 | 2019-02-22 | 兴化金孔雀实业发展有限公司 | A kind of production technology of high pure zinc oxide indirect method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4171250A (en) * | 1975-10-29 | 1979-10-16 | David B. Dean | Method for zinc ore extraction |
| CN1071714A (en) * | 1991-10-14 | 1993-05-05 | 昆明工学院 | A kind of electrolytic refining process of producing pure zinc by crude zinc |
| WO2007045055A2 (en) * | 2005-10-20 | 2007-04-26 | Lead And Zinc Complex, Pec | Method for electroextaction of zinc |
-
2010
- 2010-04-15 CN CN201010169620A patent/CN101824549A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4171250A (en) * | 1975-10-29 | 1979-10-16 | David B. Dean | Method for zinc ore extraction |
| CN1071714A (en) * | 1991-10-14 | 1993-05-05 | 昆明工学院 | A kind of electrolytic refining process of producing pure zinc by crude zinc |
| WO2007045055A2 (en) * | 2005-10-20 | 2007-04-26 | Lead And Zinc Complex, Pec | Method for electroextaction of zinc |
Non-Patent Citations (3)
| Title |
|---|
| 《四川有色金属》 20041231 密勇 浅析提高锌质量 27-28 1 , 第1期 2 * |
| 《有色矿冶》 20060630 刘显彬等 控制电锌含铅的生产实践 27-29 1 第22卷, 第3期 2 * |
| 《湿法炼锌学》 20010430 梅光贵等 湿法炼锌学 中南大学出版社 340-341，389-390 2-7 , 1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568317A (en) * | 2015-12-31 | 2016-05-11 | 株洲冶炼集团股份有限公司 | High-grade zinc electrolysis preparing method and application thereof |
| CN109368688A (en) * | 2018-12-20 | 2019-02-22 | 兴化金孔雀实业发展有限公司 | A kind of production technology of high pure zinc oxide indirect method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20100908 |