CN109797292A - In a kind of Copper making flue dust wet-treating and technique that acid descending process improves oxidation zinc leaching rate - Google Patents
In a kind of Copper making flue dust wet-treating and technique that acid descending process improves oxidation zinc leaching rate Download PDFInfo
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- CN109797292A CN109797292A CN201811622921.6A CN201811622921A CN109797292A CN 109797292 A CN109797292 A CN 109797292A CN 201811622921 A CN201811622921 A CN 201811622921A CN 109797292 A CN109797292 A CN 109797292A
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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
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Abstract
In a kind of Copper making flue dust wet-treating and technique that acid descending process improves oxidation zinc leaching rate, deacidification is neutralized using two sections of adverse currents, the step are as follows: 1) two sections of leached muds are added in liquid after electrodeposition in the wet-treating of Copper making flue dust, obtain one section of leachate and one section of leached mud；2) one section of Zinc in Leaching Residue amount 6% or so, the directly system of opening a way out；3) secondary zinc oxide that one section of leachate is added that zinc content is 65% carries out secondary deacidification, obtains two sections of leachates and two sections of leached muds；4) liquid after electrodeposition is added in two sections of leached mud circulations, adjusts liquid pH value after electrodeposition；5) two sections of immersion liquid purify evaporative crystallization, produce zinc sulfate;Advantage is: improving secondary zinc oxide utilization rate, two sections of deacidifications save 20% or so secondary zinc oxide, reduce the yield for neutralizing deacidification slag, and neutralizing acid waste residue does not enter back into leaching process, the influence to process acid concentration is leached is reduced, it is safe and accurate, controllable, it is measured using pH test paper process, pH meter terminal point control guarantees the accuracy of liquid pH after deacidification.
Description
Technical field
The invention belongs to nonferrous metallurgy fields, mention more particularly, in a kind of Copper making flue dust wet-treating with acid descending process
The technique of high oxidation zinc leaching rate.
Background technique
Copper making flue dust recycles the valuable member such as copper, zinc, lead and bismuth by the way of sulfuric acid leaching, cupric electrolysis, zinc dust precipitation
Element, and this process neutralizes deacidification generally by the way of the direct deacidification of secondary zinc oxide, that is, being directly added into secondary zinc oxide reduces acid
Degree, until complete neutralization, pH reach 5.0.Secondary zinc oxide is 85% or so as auxiliary material, main component ZnO, grade, institute
Meaning " secondary " refers to grade time, and purity is low, and neutralization reaction occurs for liquid after secondary zinc oxide and electrodeposition, it is therefore an objective to reduce the acid of liquid after electrodeposition
Property, it is not doped into any other impurity, guarantees the efficiency of subsequent zinc dust precipitation.Since zinc oxide is in alkalescent, when initial concentration is high,
Neutralization reaction rate is very fast, reacts slack-off when close to reaction end, secondary zinc oxide cannot react completely, and excessive secondary oxygen need to be added
Change zinc to reduce acidity, after pH test paper measures terminal, the actual amount of zinc oxide is far longer than theoretical amount, and zinc oxide is caused to disappear
Consume excessive, the wasting of resources.
Summary of the invention
Insufficient to solve the prior art, the present invention provides in a kind of Copper making flue dust wet-treating and acid descending process improves oxygen
The technique for changing zinc leaching rate.
The technical scheme is that
In a kind of Copper making flue dust wet-treating and acid descending process improves the technique of oxidation zinc leaching rate, is neutralized using two sections of adverse currents
Deacidification, the step are as follows:
1) two sections of leached muds are added in liquid after electrodeposition in the wet-treating of Copper making flue dust, the solid-liquid matter of liquid after control leached mud and electrodeposition
Amount does not control ph value herein, 70-80 DEG C of reaction temperature, mechanical stirring 2 hours, obtains one section of leachate and one section of leaching than being 4:1
It slags tap；
2) one section of Zinc in Leaching Residue amount 6% or so, no longer has use value, the directly system of opening a way out；
3) secondary zinc oxide that one section of leachate is added that zinc content is 65% carries out secondary deacidification, guarantees the pH of leachate after deacidification about
It is 5.0, the additional amount of secondary zinc oxide is calculated according to the acid content of one section of leachate, and it is counted weight and is added by quantitative belt, entire process
After temperature is maintained at 70-80 DEG C, mechanical stirring 2 hours, two sections of leachates and two sections of leached muds are obtained；
4) liquid after electrodeposition is added in two sections of leached mud circulations, adjusts liquid pH value after electrodeposition；
5) two sections of immersion liquid purify evaporative crystallization, produce zinc sulfate.
Wherein, when going into operation for the first time, the secondary zinc oxide that addition zinc content is 65% in step 1), solid-liquid mass ratio 2:1, instead
70-80 DEG C of temperature is answered, mechanical stirring 2 hours, obtains one section of leachate and one section of leached mud.
The invention has the advantages that two sections of deacidification residues are used to come in one section of acid descending process tentatively to reduce electrodeposition in two sections of deacidifications
The acidity of liquid afterwards, secondary zinc oxide is sufficiently reacted at this time, and zinc content is only 6% or so, is no longer had utility value, is mentioned significantly
The high utilization rate of secondary zinc oxide, two sections of deacidifications can save 20% or so secondary zinc oxide than direct deacidification, according to oxygen in 2017
The dosage for changing zinc calculates, and can save within 1 year auxiliary material expense up to 900 Yu Wanyuan, meet the development of green economy and circular economy, this
Invented technology technology reduces the yield for neutralizing deacidification slag compared with prior art technology, and neutralizing acid waste residue does not enter back into leaching
Process out reduces the influence to process acid concentration is leached, and controls conducive to whole production, more safe and accurate, controllable, benefit
It is measured with pH test paper process, pH meter terminal point control, guarantees the accuracy of liquid pH after deacidification.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
To keep the object, technical solutions and advantages of the present invention apparent, below in conjunction with attached drawing to technology of the invention
Scheme progress is more complete, is explicitly described.
In a kind of Copper making flue dust wet-treating and acid descending process improves the technique of oxidation zinc leaching rate, using two sections of adverse currents
Neutralize deacidification, the step are as follows:
1) two sections of leached muds are added in liquid after electrodeposition in the wet-treating of Copper making flue dust, the solid-liquid matter of liquid after control leached mud and electrodeposition
Amount does not control ph value herein, 70-80 DEG C of reaction temperature, mechanical stirring 2 hours, obtains one section of leachate and one section of leaching than being 4:1
It slags tap；
2) one section of Zinc in Leaching Residue amount 6% or so, no longer has use value, the directly system of opening a way out；
3) secondary zinc oxide that one section of leachate is added that zinc content mass percent is 65% carries out secondary deacidification, soaks after guaranteeing deacidification
The pH of liquid is about 5.0 out, and the additional amount of secondary zinc oxide is calculated according to the acid content of one section of leachate, is added by the weight calculation of quantitative belt
Enter, after entire process temperature is maintained at 70-80 DEG C, mechanical stirring 2 hours, obtains two sections of leachates and two sections of leached muds；
4) liquid after electrodeposition is added in two sections of leached mud circulations, adjusts liquid pH value after electrodeposition；
5) two sections of immersion liquid purify evaporative crystallization, produce zinc sulfate.
Wherein, when going into operation for the first time, the secondary zinc oxide that addition zinc content is 65% in step 1), solid-liquid mass ratio 2:1, instead
70-80 DEG C of temperature is answered, mechanical stirring 2 hours, obtains one section of leachate and one section of leached mud.
Hardware facility is also transformed while technique adjustment, is additionally arranged a pipeline and beats the residue of secondary deacidification
Secondary use is carried out into dedicated reactive tank, and is additionally arranged a dedicated filter press, to ensure the accuracy measured, is added
Hang hook steelyard weighs zinc oxide, guarantees that dosage is accurate, while corroborating each other using flowmeter and liquidometer, is tried using PH
The measurement of paper process, PH count terminal point control, guarantee that the control data of each reactive tank are accurate.
The case where certain copper smelting-furnace carries out dust treatment using the prior art and using the technology of the present invention is as follows:
1) prior art: 1-3 month uses a step deacidification, and specific data are as follows:
| Month | Dust treatment amount (dry)/ton | Zinc oxide dosage/ton | Zinc oxide unit consumption | It neutralizes slag zinc content (%) |
| January | 2957.607 | 412.812 | 0.140 | 25.43 |
| 2 months | 2255.524 | 296.132 | 0.131 | 26.96 |
| March | 1861.387 | 223.747 | 0.120 | 21.51 |
| It is total | 7074.518 | 932.691 | 0.132 | 24.63 |
2) the technology of the present invention: 6-8 month uses the technology of the present invention, and specific data are as follows:
| Month | Dust treatment amount (dry)/ton | Zinc oxide dosage/ton | Zinc oxide unit consumption | It neutralizes slag zinc content (%) |
| June | 2169.325 | 205.775 | 0.095 | 6.14 |
| July | 1907.738 | 184.192 | 0.097 | 5.61 |
| August part | 1700.257 | 140.399 | 0.081 | 5.27 |
| It is total | 5777.32 | 530.366 | 0.091 | 5.67 |
By the above comparison as it can be seen that the unit consumption of this first quarter zinc oxide of 1-3 month is 0.132 ton, i.e., a flue dust per treatment,
Need to consume 0.132 ton of zinc oxide, and this first quarter in 6-8 month uses present invention process, the unit consumption of zinc oxide is 0.091 ton,
1 ton of flue dust is handled than originally and saves 0.041 ton of zinc oxide, is calculated according to 11778 yuan/ton of the unit price of zinc oxide, processing one
The cost that flue dust can save zinc oxide is 482.898 yuan, is calculated according to 18562.003 tons of fume amount of processing in 17 years, it is contemplated that the Spring Festival holidays
About 9,000,000 or so.
By comparing above as it can be seen that the neutralization slag zinc content of directly deacidification is 24.63%, and one section of deacidification in two sections of deacidifications
Zinc in leavings amount is 5.67%, improves the utilization rate of zinc oxide, meets the development of green economy and circular economy.
Claims (2)
1. in a kind of Copper making flue dust wet-treating and acid descending process improves the technique of oxidation zinc leaching rate, using in two sections of adverse currents
And deacidification, it is characterised in that the step are as follows:
1) two sections of leached muds are added in liquid after electrodeposition in the wet-treating of Copper making flue dust, the solid-liquid matter of liquid after control leached mud and electrodeposition
Amount does not control ph value herein, 70-80 DEG C of reaction temperature, mechanical stirring 2 hours, obtains one section of leachate and one section of leaching than being 4:1
It slags tap；
2) one section of Zinc in Leaching Residue amount 6% or so, no longer has use value, the directly system of opening a way out；
3) secondary zinc oxide that one section of leachate is added that zinc content is 65% carries out secondary deacidification, guarantees the pH of leachate after deacidification about
It is 5.0, the additional amount of secondary zinc oxide is calculated according to the acid content of one section of leachate, and it is counted weight and is added by quantitative belt, entire process
After temperature is maintained at 70-80 DEG C, mechanical stirring 2 hours, two sections of leachates and two sections of leached muds are obtained；
4) liquid after electrodeposition is added in two sections of leached mud circulations, adjusts liquid pH value after electrodeposition；
5) two sections of immersion liquid purify evaporative crystallization, produce zinc sulfate.
2. in a kind of Copper making flue dust wet-treating according to claim 1 and acid descending process improves oxidation zinc leaching rate
Technique, it is characterised in that described is added the secondary zinc oxide that zinc content is 65%, solid-liquid mass ratio when going into operation for the first time, in step 1)
For 2:1,70-80 DEG C of reaction temperature, mechanical stirring 2 hours, one section of leachate and one section of leached mud are obtained.
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| CN201811622921.6A CN109797292A (en) | 2018-12-28 | 2018-12-28 | In a kind of Copper making flue dust wet-treating and technique that acid descending process improves oxidation zinc leaching rate |
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| CN201811622921.6A CN109797292A (en) | 2018-12-28 | 2018-12-28 | In a kind of Copper making flue dust wet-treating and technique that acid descending process improves oxidation zinc leaching rate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957251A (en) * | 2021-09-26 | 2022-01-21 | 济源豫光有色冶金设计研究院有限公司 | Method for harmlessly treating copper soot and recycling various metals by using waste lead storage battery acid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976743A (en) * | 1974-09-13 | 1976-08-24 | Cominco Ltd. | Treatment of zinc plant residue |
| CN102517449A (en) * | 2011-12-16 | 2012-06-27 | 山东方圆有色金属技术服务有限公司 | Comprehensive recycling technique of valuable elements in smelting soot |
| CN109055749A (en) * | 2018-09-28 | 2018-12-21 | 长沙有色冶金设计研究院有限公司 | A kind of processing method of zinc oxygen leaching solution |
-
2018
- 2018-12-28 CN CN201811622921.6A patent/CN109797292A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976743A (en) * | 1974-09-13 | 1976-08-24 | Cominco Ltd. | Treatment of zinc plant residue |
| CN102517449A (en) * | 2011-12-16 | 2012-06-27 | 山东方圆有色金属技术服务有限公司 | Comprehensive recycling technique of valuable elements in smelting soot |
| CN109055749A (en) * | 2018-09-28 | 2018-12-21 | 长沙有色冶金设计研究院有限公司 | A kind of processing method of zinc oxygen leaching solution |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957251A (en) * | 2021-09-26 | 2022-01-21 | 济源豫光有色冶金设计研究院有限公司 | Method for harmlessly treating copper soot and recycling various metals by using waste lead storage battery acid |
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