CN101603124A - A kind of method that improves current efficiency of copper electrowinning - Google Patents
A kind of method that improves current efficiency of copper electrowinning Download PDFInfo
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- CN101603124A CN101603124A CNA2009100654809A CN200910065480A CN101603124A CN 101603124 A CN101603124 A CN 101603124A CN A2009100654809 A CNA2009100654809 A CN A2009100654809A CN 200910065480 A CN200910065480 A CN 200910065480A CN 101603124 A CN101603124 A CN 101603124A
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- copper
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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
The invention discloses the method that improves current efficiency of copper electrowinning in extraction-electrodeposition wet type copper smelting technology, belong to the mineral technical field of smelting.This method adopts shallow pond formula mixer-settler as washing plant, with contain acid 10～20g/L, copper 0.2～0.5g/L solution as washing lotion, effectively reduce the content of iron in the electrolytic solution, thereby improved current efficiency, perfect original copper extraction process flow, energy-saving and cost-reducing, have industrial dissemination.
Description
Technical field
The present invention relates to a kind of copper liquid extraction-electrodeposition process and improve the current efficiency technology, belong to the mineral technical field of smelting.
Background technology
At present, the smelting mode of copper mainly contains two kinds in the world: i.e. pyrometallurgical smelting and hydrometallurgy (SX-EX).Producing cathode copper by fusion smelting and electrorefining, also is electrolytic copper, generally is suitable for high-grade copper-sulphide ores.Wet method one ship is suitable for low-grade cupric oxide, and the smart copper of producing is called electro deposited copper.In recent years, the development of extraction-electrodeposition method is very fast.Its main process comprises: 1. use the copper kerosin extracting copper of oximes chelating extractant (Lix-64N, N-510, N-530 etc.) selectively, the copper of aqueous phase enters organic phase; Use the concentration higher H
2SO
4Solution back extraction copper obtains the solution of about 50 grams per liters of cupric.Organic solvent after the back extraction after washing, returns extraction process and uses; The electrodeposition copper-bath gets electrolytic copper, and liquid returns as reverse-extraction agent after the electrolysis.Electrodeposition uses insoluble (inertia) anode, and all copper that are deposited on the negative electrode all derive from copper solutions in electrolytic deposition process, and solution copper concentration constantly descends.The cathodic reaction of electrolysis and electrolytic deposition process is the same, available following The Representation Equation:
Cu
2++2e-→Cu
But, the copper-bath electrolytic deposition process, anodic reaction is to generate oxygen:
2OH
--→1/
2O
2+H
2O+2e
Total bath voltage of electrodeposition is between 1.9～2.3V.It is exactly the direct current energy that is consumed that bath voltage multiply by the required electric weight of reduction copper per ton, considers the efficient of rectification again, and the electric energy consumption of electrodeposition It copper is about 2000～2700kW.The main factor that influences power consumption is exactly an iron, Fe
2+Change into Fe in anodic oxygen
3+, Fe
3+Be diffused into negative electrode and be reduced to Fe again
2+,
Oxidation-reduction process so repeatedly causes current loss.Therefore, in electrolytic deposition process, need effective deironing could guarantee the raising of current efficiency.Original extraction-the electrodeposition of Lingbao Gold Company Ltd. is carried three of copper production lines, because the accumulation of iron ion in the electrolytic solution causes current efficiency to be lower than 80% for a long time, and the disconnected ear of negative electrode is serious, has influenced ordinary production.Be badly in need of at present extraction-electrodeposition method is improved, satisfy the actual production demand.
Summary of the invention
The object of the invention is to provide a kind of method that improves current efficiency of copper electrowinning in extraction-electrodeposition wet type copper smelting technology.
Cardinal principle of the present invention is, in extraction-electrodeposition wet type copper smelting technology, adopt the load organic phases washing technology, with washing lotion and the organic phase thorough mixing that is entrained with water, to organic phase washing, the iron ion of carrying secretly in the organic phase is reduced to minimum, reduce the transfer of iron, thereby reduce the electrolytic solution iron ion content, reach the purpose that reduces electric energy loss in original technical process.
For realizing the object of the invention, concrete technical scheme is as follows:
In extraction-electrodeposition wet type copper smelting technology, load organic phases oxime type extraction agent-----LiX984 (commercially available prod) enters shallow pond formula mixer-settler, at mixing section organic phase and washing lotion thorough mixing, compare A/O (V/V, be volume ratio)=1: 1～1: 3., washing lotion is selected the solution of sulfur acid 5～20g/L, copper 0.2～0.6g/L for use.Load organic phases enters back extraction-electrodeposition operation by overflow weir under the phase-splitting clarification of mixer-settler then, recycles and washing water return the mixer-settler mixing section by the aqueous-phase reflux pipe.
Key problem in technology and innovative point are: 1, existing technology is improved, increased the washing of copper load organic phases, and washing lotion is selected for use and proportioning has been carried out test and inquired into; 2, washing plant is selected shallow pond formula mixer-settler for use, and shallow pond formula mixer-settler increases the aqueous-phase reflux pipe, and the washing water directly returns mixing section and recycles.
Advantage of the present invention: organically combine with original extraction-electrodeposition flow process, effectively reduce iron ion content in the electrolytic solution, improved current efficiency greatly, current efficiency by original flow process≤80% be increased to 〉=90%.Only need to increase the shallow pond of one-level formula in addition and mix the clarifying chamber, can save equipment such as dashpot in the old process, pump, save investment, handled easily, further perfect original flow process as washing plant.
Description of drawings
Fig. 1 is the present invention's extraction-electrodeposition schema;
Fig. 2 is washing mixer-settler structural representation, and 1 is mixing section among the figure, and 2 is agitator, and 3 is the clarifying chamber, and 4 is overflow weir, and 5 is the aqueous-phase reflux pipe.
Embodiment
For the present invention is illustrated better, as follows for embodiment:
Embodiment 1
In extraction-electrodeposition wet type copper smelting technology, with load organic phases material (oxime type extraction agent-----LiX984, the commercially available prod) (the mixing section unit effect of shallow pond formula mixer-settler is the thorough mixing material to pour the mixing section of shallow pond formula mixer-settler into, concrete structure is seen accompanying drawing 2), the solution that adds sulfur acid 12g/L, copper 0.5g/L is as washing lotion, make organic phase and washing lotion thorough mixing, compare A/O (V/V)=1: 3.; Load organic phases enters back extraction-electrodeposition operation by overflow weir under the phase-splitting clarification of mixer-settler then, recycles and washing water return the mixer-settler mixing section by the aqueous-phase reflux pipe.
Original extracting-back extraction-electrodeposition flow process current efficiency 78%, the disconnected ear of negative electrode is serious, the present invention improves original technical process, compare with original extracting-back extraction-electrodeposition flow process, between extraction and back extraction workshop section, increase the washing operation operation, mix the clarifying chamber as washing plant with the shallow pond of one-level formula, make in the electrolytic solution iron level reduce to 2g/L by 6g/L, current efficiency is increased to 92%, has obtained effect preferably, has saved the energy.
Claims (3)
1, a kind of method that improves current efficiency of copper electrowinning, it is characterized in that, in extraction-electrodeposition wet type copper smelting technology, copper load organic phases from extraction section is washed, with contain acid 10～20g/L, copper 0.2～0.5g/L solution as washing lotion, wash in the formula mixer-settler of shallow pond, washing back organic phase enters the back extraction operation; The aqueous-phase reflux pipe of washing water by shallow pond formula mixer-settler returns mixing section and recycles.
2. improve the method for current efficiency of copper electrowinning, according to claim 1, it is characterized in that, described acid is sulfuric acid.
3, improve the method for current efficiency of copper electrowinning according to claim 1, it is characterized in that, organic phase and washing lotion phase volume ratio A/O=1: 1～1: 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100654809A CN101603124A (en) | 2009-07-21 | 2009-07-21 | A kind of method that improves current efficiency of copper electrowinning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100654809A CN101603124A (en) | 2009-07-21 | 2009-07-21 | A kind of method that improves current efficiency of copper electrowinning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101603124A true CN101603124A (en) | 2009-12-16 |
Family
ID=41469023
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|---|---|---|---|
| CNA2009100654809A Pending CN101603124A (en) | 2009-07-21 | 2009-07-21 | A kind of method that improves current efficiency of copper electrowinning |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184333A (en) * | 2011-12-30 | 2013-07-03 | 北京有色金属研究总院 | High grade copper oxide-containing material sulfuric acid leaching and stage extraction technology |
| CN110527832A (en) * | 2019-09-20 | 2019-12-03 | 常州工学院 | A kind of copper extractant |
-
2009
- 2009-07-21 CN CNA2009100654809A patent/CN101603124A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184333A (en) * | 2011-12-30 | 2013-07-03 | 北京有色金属研究总院 | High grade copper oxide-containing material sulfuric acid leaching and stage extraction technology |
| CN103184333B (en) * | 2011-12-30 | 2014-08-06 | 北京有色金属研究总院 | High grade copper oxide-containing material sulfuric acid leaching and stage extraction technology |
| CN110527832A (en) * | 2019-09-20 | 2019-12-03 | 常州工学院 | A kind of copper extractant |
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Application publication date: 20091216 |