CN103374655B - Wet method copper-extracting process - Google Patents
Wet method copper-extracting process Download PDFInfo
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- CN103374655B CN103374655B CN201210122981.8A CN201210122981A CN103374655B CN 103374655 B CN103374655 B CN 103374655B CN 201210122981 A CN201210122981 A CN 201210122981A CN 103374655 B CN103374655 B CN 103374655B
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a kind of wet method copper-extracting process, described wet method copper-extracting process comprises: A) comminution is carried out to prepare ore pulp to cupric oxide ore, then carry out classification to obtain overflow pulp to described ore pulp, wherein said cupric oxide ore comprises cupric mica; B) in described overflow pulp, add the vitriol oil and carry out stirring to carry out acidleach to described overflow pulp, wherein said acidleach is carried out under the condition of 45 degrees Celsius-85 degrees Celsius; And C) solid-liquid separation is carried out to obtain leach liquor to the ore pulp after acidleach, described leach liquor is extracted and electrodeposition to obtain cathode copper.By utilizing the wet method copper-extracting process according to the embodiment of the present invention, the leaching yield of the cupric oxide ore comprising cupric mica can be improved widely.
Description
Technical field
The present invention relates to field of metallurgy, in particular to a kind of wet method copper-extracting process.
Background technology
Traditionally, block copper oxide ore, because of good penetrability, adopts the wet method copper-extracting process of " dump leaching-Extraction electrodeposition " to extract copper from the copper oxide ore of bulk.But for containing cupric mica (namely copper is wrapped up by mica) and the high copper oxide ore of silt content, according to the wet method copper-extracting process of " dump leaching-Extraction electrodeposition ", then leaching yield extremely low (54.6%-63.6%), does not also have a kind of for containing cupric mica and the high cupric oxide ore of silt content effectively can improve the wet method copper-extracting process of leaching yield in currently available technology.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.
For this reason, one object of the present invention is to propose a kind of wet method copper-extracting process that can improve the leaching yield of the cupric oxide ore comprising cupric mica widely.
For achieving the above object, according to embodiments of the invention, a kind of wet method copper-extracting process is proposed, described wet method copper-extracting process comprises: A) comminution is carried out to prepare ore pulp to cupric oxide ore, then carry out classification to obtain overflow pulp to described ore pulp, wherein said cupric oxide ore comprises cupric mica; B) in described overflow pulp, add the vitriol oil and carry out stirring to carry out acidleach to described overflow pulp, wherein said acidleach is carried out under the condition of 45 degrees Celsius-85 degrees Celsius; And C) solid-liquid separation is carried out to obtain leach liquor to the ore pulp after acidleach, described leach liquor is extracted and electrodeposition to obtain cathode copper.
Pass through to carry out described acidleach under the condition of 45 degrees Celsius-85 degrees Celsius according to the wet method copper-extracting process of the embodiment of the present invention, thus can effectively get rid of the mica be wrapped on copper, the copper wrapped up can be leached like this by mica.Therefore, by utilizing the wet method copper-extracting process according to the embodiment of the present invention, the leaching yield (bringing up to 85% from about 60%) of the cupric oxide ore comprising cupric mica can be improved widely.
In addition, wet method copper-extracting process according to the above embodiment of the present invention can also have following additional technical characteristic:
According to one embodiment of present invention, described acidleach is carried out under the condition of 65 degrees Celsius.The leaching yield of the cupric oxide ore comprising cupric mica can be improved so widely, make copper resource obtain maximized economic space structure.
According to one embodiment of present invention, described steps A) comprising: A-1) successively coarse breaking, Semi-Autogenous and ball milling are carried out to prepare described ore pulp to described cupric oxide ore; And A-2) classification is carried out to obtain the overflow pulp that concentration is 25%-35% to described ore pulp, the granularity P of the ore of wherein said overflow pulp
80be not more than 150 μm.
According to one embodiment of present invention, described step B) comprising: B-1) add in described overflow pulp the vitriol oil with by the pH regulator of described overflow pulp for 1.5-2.5; And B-2) stir to carry out described acidleach to described overflow pulp, wherein said acidleach carries out 1 hour-8 hours.
According to one embodiment of present invention, described step C) comprising: C-1) countercurrent washing is carried out to obtain described leach liquor to the ore pulp after described acidleach; And C-2) described leach liquor is extracted, strip and electrodeposition to obtain cathode copper.
According to one embodiment of present invention, described steps A) also comprise: A-3) described overflow pulp is carried out concentrated to obtain the thickening mineral slurries that concentration is 45%-60%, and at described step B-1) in described thickening mineral slurries, add raffinate and the vitriol oil to obtain diluting ore pulp, the pH of wherein said dilution ore pulp is 1.5-2.5 and the concentration of described dilution ore pulp is 20%-35%.The acid in raffinate can be recycled like this, thus not only can reduce consumption, the reduction production cost of the vitriol oil, and can zero release be realized, avoid contaminate environment.
According to one embodiment of present invention, the concentration of described overflow pulp is 30% and the granularity P of the ore of described overflow pulp
80be not more than 106 μm, the concentration of described thickening mineral slurries is 50%.The leaching yield of the cupric oxide ore comprising cupric mica can be improved so further.
According to one embodiment of present invention, in described steps A-2) in, utilize swirler to carry out classification to described ore pulp, in described steps A-3) in, utilize thickner to concentrate described overflow pulp.
According to one embodiment of present invention, at described step B-1) in, the pH of described dilution ore pulp is 2.0 and the concentration of described dilution ore pulp is 26%.The leaching yield of the cupric oxide ore comprising cupric mica can be improved so further.
According to one embodiment of present invention, at described step B-2) in, described acidleach carries out 4 hours.Most copper in described cupric oxide ore can be leached like this.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schema of the wet method copper-extracting process according to the embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Referring to Fig. 1, the wet method copper-extracting process according to the embodiment of the present invention is described.As shown in Figure 1, comprise the following steps according to the wet method copper-extracting process of the embodiment of the present invention:
A) carry out comminution to prepare ore pulp to cupric oxide ore, then carry out classification to obtain overflow pulp to described ore pulp, wherein said cupric oxide ore comprises cupric mica;
B) in described overflow pulp, add the vitriol oil and carry out stirring to carry out acidleach to described overflow pulp, wherein said acidleach is carried out under the condition of 45 degrees Celsius-85 degrees Celsius; With
C) solid-liquid separation is carried out to obtain leach liquor to the ore pulp after acidleach, described leach liquor is extracted and electrodeposition to obtain cathode copper.
Mica is sheet, high resilience, acid and alkali-resistance, although therefore passed through broken and ore grinding by the copper oxide ore that mica wraps up, copper oxide ore is still tightly wrapped in by mica, acid solution cannot dissolve mica, does not also just reach copper oxide ore, the copper in copper oxide ore cannot be leached.The research direction of prior art wishes that the granularity by reducing copper oxide ore removes the mica of substitute and being rolled on copper, but no matter how to reduce the granularity of copper oxide ore, still can not get rid of the mica be wrapped on copper.
Find after contriver in depth studies, after described overflow pulp is heated to 45 degrees Celsius-85 degrees Celsius, can effectively get rid of the mica be wrapped on copper, thus copper oxide ore can be made out exposed, carry out the leaching yield that acidleach can improve described cupric oxide ore widely on this basis.Pass through to carry out described acidleach under the condition of 45 degrees Celsius-85 degrees Celsius according to the wet method copper-extracting process of the embodiment of the present invention, thus can effectively get rid of the mica be wrapped on copper, the copper wrapped up can be leached like this by mica.Therefore, by utilizing the wet method copper-extracting process according to the embodiment of the present invention, the leaching yield (bringing up to 85% from about 60%) of the cupric oxide ore comprising cupric mica can be improved widely.
Advantageously, described acidleach can be carried out under the condition of 65 degrees Celsius.The leaching yield of the cupric oxide ore comprising cupric mica can be improved so widely, make copper resource obtain maximized economic space structure.
As shown in Figure 1, in some embodiments of the invention, described steps A) can comprise:
A-1) successively coarse breaking, Semi-Autogenous and ball milling are carried out to prepare described ore pulp to described cupric oxide ore; With
A-2) classification is carried out to obtain the overflow pulp that concentration is 25%-35% to described ore pulp, the granularity P of the ore of wherein said overflow pulp
80be not more than 150 μm.
In this application, the concentration of ore pulp is the weight percent concentration of ore pulp.
Specifically, crusher (such as jaw crusher, double-geared roller crusher etc.) can be utilized to carry out coarse breaking to reach into mill ore fragmentation to described cupric oxide ore, then described cupric oxide ore added water and carry out Semi-Autogenous and ball milling successively to prepare described ore pulp.Then swirler can be utilized to carry out classification to obtain described overflow pulp to described ore pulp, and the concentration of wherein said overflow pulp is 25%-35%, the granularity P of the ore of described overflow pulp
80can be not more than 150 μm (i.e. the granularity of in the ore of described overflow pulp 80% is not more than 150 μm).In other words, in described overflow pulp, granularity is not more than 150
μm ore account for 80% of whole ore in described overflow pulp.Advantageously, the concentration of described overflow pulp can be 30%, the granularity P of the ore of described overflow pulp
80106 μm can be not more than, the leaching yield of the cupric oxide ore comprising cupric mica can be improved so further.
Ball milling can be proceeded until the granularity of these ores meets the requirements to classification sand setting ore pulp (namely comprising the ore pulp of the undesirable ore of granularity).
In examples more of the present invention, described step B) can comprise:
B-1) add in described overflow pulp the vitriol oil with by the pH regulator of described overflow pulp for 1.5-2.5; With
B-2) stir to carry out described acidleach to described overflow pulp, wherein said acidleach carries out 1 hour-8 hours.
In one embodiment of the invention, described step C) can comprise:
C-1) countercurrent washing is carried out to obtain described leach liquor to the ore pulp after described acidleach;
C-2) described leach liquor is extracted, strip and electrodeposition to obtain cathode copper.
Particularly, thickner can be utilized to carry out countercurrent washing to the ore pulp after described acidleach.Effectively can realize soaking being separated, to obtain described leach liquor of slag and leach liquor by described countercurrent washing.Wherein said leaching slag, after neutralizing treatment, is sent to tailings reservoir for piling.In order to obtain purer leach liquor as far as possible, thickner can be utilized to carry out three sections of countercurrent washings or clarifying treatment to the ore pulp after acidleach.
It will be appreciated by persons skilled in the art that and known method can be utilized to carry out described extraction, described reextraction and described electrodeposition, no longer describe in detail at this.
Advantageously, described steps A) can also comprise: A-3) described overflow pulp is carried out concentrated to obtain the thickening mineral slurries that concentration is 45%-60%, and at described step B-1) in described thickening mineral slurries, add raffinate and the vitriol oil to obtain diluting ore pulp, the pH of wherein said dilution ore pulp is 1.5-2.5 and the concentration of described dilution ore pulp is 20%-35%.
In other words, raffinate can be joined to dilute described thickening mineral slurries and to obtain diluting ore pulp in described thickening mineral slurries, wherein raffinate regulates the pH of ore pulp together with the vitriol oil (concentration of the described vitriol oil can be not less than 92.5%).The acid in raffinate can be recycled like this, thus not only can reduce consumption, the reduction production cost of the vitriol oil, and can zero release be realized, avoid contaminate environment.
Thickner can be utilized to carry out described overflow pulp concentrated to obtain thickening mineral slurries, the concentration of wherein said thickening mineral slurries can be 45%-60%.Advantageously, the concentration of described thickening mineral slurries can be 50%, is so not only conducive to realizing concentrated, pumping and concentration instrument measures, and raffinate can fully recovering simultaneously, and can improve the leaching yield of the cupric oxide ore comprising cupric mica further.
Advantageously, the concentration of described dilution ore pulp can be 26%, and the pH of described dilution ore pulp can be 2.0, can improve the leaching yield of the cupric oxide ore comprising cupric mica so further.In other words, described acidleach can be carried out under pH is the condition of 2.0.Particularly, described acidleach can carry out 4 hours, the most copper in described cupric oxide ore can be leached like this.
Embodiment 1
First double-geared roller crusher (CR610/08-12 is utilized, Sandvik Tamrock OY) coarse breaking is carried out to the cupric oxide ore that largest grain size is 1000mm, make ore largest grain size be down to about 250mm, then utilize φ 5.5 × 2.5 wet type semi-autogenous mill (NFC (Shenyang) Metallurgical Machinery Co., Ltd.) and φ 4.5 × 6.1 wet overflow type ball mill (NFC (Shenyang) Metallurgical Machinery Co., Ltd.) to grind to prepare ore pulp to the cupric oxide ore after coarse breaking successively.
Then swirler (FX500-GX × 8 a cluster cyclone, Weihai Haiwang Hydrocyclone Co., Ltd., Beijing Huayu Engineering Co., Ltd. of Zh) is utilized to carry out classification to obtain the overflow pulp that concentration is 25%, the granularity P of the ore of wherein said overflow pulp to described ore pulp
80be not more than 150 μm.Then thickner (NXZ50G, Huaibei Mining Machine Manufacturing Co., Ltd.) is utilized to carry out described overflow pulp concentrated to obtain the thickening mineral slurries that concentration is 45%.
Add in described thickening mineral slurries raffinate dilute described thickening mineral slurries with obtain concentration be 20% dilution ore pulp and the vitriol oil simultaneously adding 98% with by the pH regulator of described dilution ore pulp for 1.5, then described dilution ore pulp stirred and under the condition of 45 degrees Celsius, carry out the acidleach of 1 hour.
Finally three sections of countercurrent washings, extraction, reextraction and electrodeposition are carried out to obtain cathode copper to the ore pulp after acidleach.In this embodiment, the leaching yield of the copper in described cupric oxide ore is 71%.
Embodiment 2
First double-geared roller crusher (CR610/08-12 is utilized, Sandvik Tamrock OY) coarse breaking is carried out to the cupric oxide ore that largest grain size is 1000mm, make ore largest grain size be down to about 250mm, then utilize φ 5.5 × 2.5 wet type semi-autogenous mill (NFC (Shenyang) Metallurgical Machinery Co., Ltd.) and φ 4.5 × 6.1 wet overflow type ball mill (NFC (Shenyang) Metallurgical Machinery Co., Ltd.) to grind to prepare ore pulp to the cupric oxide ore after coarse breaking successively.
Then swirler (FX500-GX × 8 a cluster cyclone, Weihai Haiwang Hydrocyclone Co., Ltd., Beijing Huayu Engineering Co., Ltd. of Zh) is utilized to carry out classification to obtain the overflow pulp that concentration is 35%, the granularity P of the ore of wherein said overflow pulp to described ore pulp
80be not more than 130 μm.Then thickner (NXZ50G, Huaibei Mining Machine Manufacturing Co., Ltd.) is utilized to carry out described overflow pulp concentrated to obtain the thickening mineral slurries that concentration is 60%.
Add in described thickening mineral slurries raffinate dilute described thickening mineral slurries with obtain concentration be 35% dilution ore pulp and the vitriol oil simultaneously adding 98% with by the pH regulator of described dilution ore pulp for 2.5, then described dilution ore pulp stirred and under the condition of 85 degrees Celsius, carry out the acidleach of 8 hours.
Finally three sections of countercurrent washings, extraction, reextraction and electrodeposition are carried out to obtain cathode copper (three sections of countercurrent washings, extraction, reextraction and electrodeposition in embodiment 2 are identical with embodiment 1) to the ore pulp after acidleach.In this embodiment, the leaching yield of the copper in described cupric oxide ore is 85%.
Embodiment 3
First double-geared roller crusher (CR610/08-12 is utilized, Sandvik Tamrock OY) coarse breaking is carried out to the cupric oxide ore that largest grain size is 1000mm, make ore largest grain size be down to about 250mm, then utilize φ 5.5 × 2.5 wet type semi-autogenous mill (NFC (Shenyang) Metallurgical Machinery Co., Ltd.) and φ 4.5 × 6.1 wet overflow type ball mill (NFC (Shenyang) Metallurgical Machinery Co., Ltd.) to grind to prepare ore pulp to the cupric oxide ore after coarse breaking successively.
Then swirler (FX500-GX × 8 a cluster cyclone, Weihai Haiwang Hydrocyclone Co., Ltd., Beijing Huayu Engineering Co., Ltd. of Zh) is utilized to carry out classification to obtain the overflow pulp that concentration is 30%, the granularity P of the ore of wherein said overflow pulp to described ore pulp
80be not more than 106 μm.Then thickner (NXZ50G, Huaibei Mining Machine Manufacturing Co., Ltd.) is utilized to carry out described overflow pulp concentrated to obtain the thickening mineral slurries that concentration is 50%.
Add in described thickening mineral slurries raffinate dilute described thickening mineral slurries with obtain concentration be 26% dilution ore pulp and the vitriol oil simultaneously adding 98% with by the pH regulator of described dilution ore pulp for 2.0, then described dilution ore pulp stirred and under the condition of 65 degrees Celsius, carry out the acidleach of 4 hours.
Finally three sections of countercurrent washings, extraction, reextraction and electrodeposition are carried out to obtain cathode copper (three sections of countercurrent washings, extraction, reextraction and electrodeposition in embodiment 3 are identical with embodiment 1) to the ore pulp after acidleach.In this embodiment, the leaching yield of the copper in described cupric oxide ore is 82%.
As can be seen from embodiment 1-3, the leaching yield of embodiment 2 is the highest, but due to the acidleach of embodiment 2 be carry out 8 hours under the condition of 85 degrees Celsius, therefore energy consumption is higher.Although the leaching yield of embodiment 3 is a little less than the leaching yield of embodiment 2, because the energy consumption of embodiment 3 is lower, therefore than embodiment 2 more economical rationality.
By utilizing the wet method copper-extracting process according to the embodiment of the present invention, the leaching yield (bringing up to 85% from about 60%) of the cupric oxide ore comprising cupric mica can be improved widely.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. a wet method copper-extracting process, is characterized in that, comprising:
A) carry out comminution to prepare ore pulp to cupric oxide ore, then carry out classification to obtain overflow pulp to described ore pulp, wherein said cupric oxide ore comprises cupric mica;
B) in described overflow pulp, add the vitriol oil and carry out stirring to carry out acidleach to described overflow pulp, wherein said acidleach is carried out under the condition of 45 degrees Celsius-85 degrees Celsius, to get rid of the mica be wrapped on copper, makes copper oxide ore out exposed; With
C) solid-liquid separation is carried out to obtain leach liquor to the ore pulp after acidleach, described leach liquor is extracted and electrodeposition to obtain cathode copper.
2. wet method copper-extracting process according to claim 1, is characterized in that, described acidleach is carried out under the condition of 65 degrees Celsius.
3. wet method copper-extracting process according to claim 2, is characterized in that, described steps A) comprising:
A-1) successively coarse breaking, Semi-Autogenous and ball milling are carried out to prepare described ore pulp to described cupric oxide ore; With
A-2) classification is carried out to obtain the overflow pulp that weight percent concentration is 25%-35% to described ore pulp, the granularity P of the ore of wherein said overflow pulp
80be not more than 150 μm.
4. wet method copper-extracting process according to claim 3, is characterized in that, described step B) comprising:
B-1) add in described overflow pulp the vitriol oil with by the pH regulator of described overflow pulp for 1.5-2.5; With
B-2) stir to carry out described acidleach to described overflow pulp, wherein said acidleach carries out 1 hour-8 hours.
5. wet method copper-extracting process according to claim 4, is characterized in that, described step C) comprising:
C-1) countercurrent washing is carried out to obtain described leach liquor to the ore pulp after described acidleach; With
C-2) described leach liquor is extracted, strip and electrodeposition to obtain cathode copper.
6. wet method copper-extracting process according to claim 5, it is characterized in that, described steps A) also comprise: A-3) described overflow pulp is carried out concentrated to obtain the thickening mineral slurries that weight percent concentration is 45%-60%, and at described step B-1) in described thickening mineral slurries, add raffinate and the vitriol oil to obtain diluting ore pulp, the pH of wherein said dilution ore pulp is 1.5-2.5 and the weight percent concentration of described dilution ore pulp is 20%-35%.
7. wet method copper-extracting process according to claim 6, is characterized in that, the weight percent concentration of described overflow pulp is 30% and the granularity P of the ore of described overflow pulp
80be not more than 106 μm, the weight percent concentration of described thickening mineral slurries is 50%.
8. wet method copper-extracting process according to claim 6, is characterized in that, in described steps A-2) in, utilize swirler to carry out classification to described ore pulp, in described steps A-3) in, utilize thickner to concentrate described overflow pulp.
9. wet method copper-extracting process according to claim 6, is characterized in that, at described step B-1) in, the pH of described dilution ore pulp is 2.0 and the weight percent concentration of described dilution ore pulp is 26%.
10. wet method copper-extracting process according to claim 6, is characterized in that, at described step B-2) in, described acidleach carries out 4 hours.
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| CN103866138A (en) * | 2014-03-31 | 2014-06-18 | 贵州宏业矿产资源开发有限公司 | Process for refining copper from waste minerals |
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| CN107502743A (en) * | 2017-07-07 | 2017-12-22 | 广东佳纳能源科技有限公司 | A kind of processing method of cathode copper waste liquid |
| CN107812605B (en) * | 2017-11-14 | 2019-10-29 | 大冶有色金属集团控股有限公司 | A kind of ore-dressing technique mentioning copper drop silicon |
| CN108118160A (en) * | 2017-12-04 | 2018-06-05 | 云南驰宏资源综合利用有限公司 | A kind of method of chrysocolla type cupric oxide ore wet underwater welding copper |
| CN110079680B (en) * | 2019-06-03 | 2021-07-27 | 东北大学 | Copper extraction method for complex copper oxide ores in various copper occurrence states |
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