CN112337654A - Application of metal ion brine in flotation separation of copper sulfide gold ore difficult to separate - Google Patents
Application of metal ion brine in flotation separation of copper sulfide gold ore difficult to separate Download PDFInfo
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- CN112337654A CN112337654A CN202011107349.7A CN202011107349A CN112337654A CN 112337654 A CN112337654 A CN 112337654A CN 202011107349 A CN202011107349 A CN 202011107349A CN 112337654 A CN112337654 A CN 112337654A
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- metal ion
- copper sulfide
- flotation separation
- sulfide gold
- brine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses application of metal ion brine in flotation separation of extremely difficult-to-separate copper sulfide gold ores, wherein in the flotation process of the extremely difficult-to-separate copper sulfide gold ores which are not subjected to desliming pretreatment, divalent metal ion brine is adopted to inhibit the argillization of fine gangue minerals, so that the extremely difficult-to-separate copper sulfide gold ores are efficiently separated, and the effect of reducing the dosage of other flotation reagents is achieved.
Description
Technical Field
The invention relates to a flotation separation method for extremely difficult-to-separate copper sulfide gold ores, in particular to a method for inhibiting gangue mineral argillization and performing size mixing on the whole extremely difficult-to-separate copper sulfide gold ores so as to improve the recovery rate and grade of the copper gold ores in the flotation separation process of the copper sulfide gold ores by utilizing divalent metal ion saline water, and belongs to the technical field of flotation separation.
Background
Along with the development of social economy, mineral resources are exploited and utilized in large quantities, rich ore and easily-treated high-quality mineral resources are gradually reduced, and how to efficiently utilize low-grade complex ores with fine embedded granularity becomes an ongoing challenge in the mineral processing industry. A large amount of slime often occurs in flotation slurries of low grade complex ores due to natural weathering or alteration or over-comminution during crushing or grinding. The main component of the slime is clay mineral, which belongs to layered silicate mineral, and the clay can generate hydration expansion when dispersed in water, so that the viscosity of the ore pulp is increased, and the fluidity is deteriorated, thereby influencing the effect among particles in the ore pulp and the use of medicaments. Currently, the adverse effect of clay and other fine-grained gangue minerals in flotation is mainly focused on the improvement of the process, and the methods adopted at present comprise pre-desliming, adding clay inhibitors and the like. Due to the fact that the variety of the medicament is large, the dosage is large, and meanwhile, due to the fact that gangue minerals in ores are various and complex in composition, the effect of the method of using the method of pre-desliming or adding the clay inhibitor on the copper sulfide gold which is difficult to select and easy to argillize is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the application of metal ion brine in the flotation separation of the extremely difficult-to-select copper sulfide gold ore, the divalent metal ion brine is utilized to carry out size mixing on the whole extremely difficult-to-select easily-argillized low-grade copper sulfide gold ore, the divalent metal ion brine plays a role in efficiently inhibiting argillization of fine-grained gangue minerals, the efficient separation of the copper sulfide gold ore is realized, the types and the dosage of reagents and the adjustment of ore selection procedures are reduced, meanwhile, the divalent metal ion brine (which can be replaced by seawater) has the advantages of low cost, less pollution and the like, the investment and the reconstruction of the reagents and equipment can be reduced, the difficulty of wastewater treatment is reduced, and the invention has great significance for reducing the cost and protecting the environment.
In order to achieve the technical purpose, the invention provides application of metal ion brine in flotation separation of extremely difficult-to-separate copper sulfide gold ores, and divalent metal ion brine is adopted to inhibit argillization of fine-grained gangue minerals in the flotation process of the extremely difficult-to-separate copper sulfide gold ores without desliming pretreatment.
The technical scheme of the invention utilizes divalent metal ion saline water to inhibit the argillization of fine-grained gangue minerals, mainly based on clay minerals which are easy to argillization in copper sulfide gold ores, such as montmorillonite, chlorite and the like, and belongs to layered silicate minerals. In an aqueous solution, the clay has a certain hydration expansibility, and the general clay expansion is divided into two stages, namely lattice expansion and osmotic expansion. When the clay is dispersed in water, the surface of the clay is permanently negative, so that water molecules are attracted to surround the surface of the clay in a dipole form to form a water molecular layer in directional arrangement under the action of electrostatic force, and lattice expansion is formed. Meanwhile, the difference of the concentrations of the ions inside and outside the clay crystal leads to the diffusion of water molecules to the inside of the crystal layer, so that a diffusion double electric layer is formed, and therefore, osmotic expansion is generated. Divalent metal cations in the brine mainly form a concentration gradient in the clay crystal to compress an electric double layer, so that hydration expansion of the clay is inhibited, and the viscosity of the clay is reduced. The divalent metal ion saline water can directly inhibit hydration expansion of the clay in a certain concentration range, reduce viscosity of the clay, and avoid adverse effects caused by calcium and magnesium ions (1.0 mol/L) with higher concentration, such as heterogeneous coagulation and the like. The univalent metal ions are not easy to generate adverse effects such as heterogeneous agglomeration, and the univalent metal ions have lower strength relative to the bivalent metal ions under the same concentration, have insufficient inhibition effect on clay, and are easy to generate other reactions to deteriorate the concentrate grade, so that the method is not suitable for the technical scheme of the invention.
As a preferred embodiment, the divalent metal ion brine, such as brackish water. The concentration of the divalent metal ions in the divalent metal ion salt water is 0.01-1.0 mol/L; the concentration of the divalent metal ion in the divalent metal ion salt water is more preferably 0.1mol/L to 1.0 mol/L. The divalent metal ion brine can directly act with clay within a certain concentration range, inhibits hydration expansion of the clay, and reduces viscosity of the clay. When the concentration of divalent metal ions in the brine is too low, the clay inhibition effect is not obvious; too high concentration of calcium and magnesium ions (>1.0mol/L) can still cause adverse effects such as heterogeneous agglomeration due to excess calcium and magnesium ions participating in the addition reaction in the solution.
As a preferred embodiment, the divalent metal ion is magnesium ion and/or calcium ion. In theory, common divalent metal ions are suitable for the technical scheme of the invention, but the calcium ion and magnesium ion salt aqueous solution can be replaced by seawater (bitter water) and the like, so that the method has the advantage of cost.
As a preferable scheme, the extremely difficult-to-separate copper sulfide gold ore without desliming pretreatment is subjected to size mixing by using divalent metal ion brine to obtain ore pulp with the mass percentage concentration of 30% -35%, and the ore pulp is subjected to flotation separation by using amyl xanthate as a flotation agent and using isoamylol as a foaming agent to obtain copper gold concentrate.
As a preferred solution, the flotation separation comprises two roughenings and three sweeps.
As a further preferred embodiment, the dosage system of the primary roughing is: 20-40 g/t of amyl xanthate and 10-20 g/t of isoamylol.
As a preferred scheme, the medicament system for the secondary roughing is as follows: 10-20 g/t of amyl xanthate and 5-10 g/t of isoamylol.
As a preferred scheme, the medicament system of three scavenging is as follows: 5-15 g/t of amyl xanthate.
As a preferable scheme, the pH value of the ore pulp system is controlled to be 9.0-9.5 in the primary roughing and the secondary roughing.
The flotation separation of the copper sulfide gold ore which is extremely difficult to separate comprises the following specific steps:
1) carrying out dry grinding dissociation on copper sulfide gold raw ores, wherein the grinding fineness is determined according to the monomer dissociation requirements of useful minerals in different ores;
2) carrying out size mixing on the copper sulfide gold ore obtained in the step 1) by using divalent metal ion saline water, wherein the concentration of divalent metal cations in the divalent metal ion saline water is 0.1-1.0 mol/L, and the pH value of pulp after size mixing is 9.0-9.5;
3) the flotation separation process comprises two times of rough concentration and three times of scavenging;
and in the rough separation process, before the first rough separation, according to the ratio of 20-40 g/t of collecting agent to 10-20 g/t of foaming agent per ton of raw ore, 10-20 g/t of collecting agent and 5-10 g/t of foaming agent are additionally added before the second rough separation, and 5-15 g/t of collecting agent is added into ore pulp in the scavenging process.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1) the invention uses the divalent metal ion saline water in the flotation separation process of the copper sulfide gold ore which is difficult to be separated and easy to be argillized, and is different from the method of adding a medicament or a physical method, the divalent metal cations in the divalent metal ion saline water can directly inhibit argillization by compressing a double electric layer, so that the integral viscosity of ore pulp is reduced, the separation effect is more obvious, and the recovery rate and the grade of the copper gold concentrate are obviously improved.
2) The divalent metal ion brine can be prepared from special salty bitter water or seawater in some regions for use, and has the advantages of low cost, less pollution and the like.
3) The divalent metal ion brine of the invention is alkaline and contributes to the increase of the pH of the flotation system, so that the lime consumption is reduced.
4) The reasonable matching of the divalent metal ion brine, the collecting agent and the foaming agent has obvious synergistic effect, and the medicament cost is greatly saved.
Detailed Description
The following examples are intended to further illustrate the present disclosure, but the scope of the claims of the present invention is not limited by these examples.
Example 1
The metal minerals in certain copper sulfide gold ores in Australia in Western Australia comprise gold, chalcopyrite and pyrite, and the gangue minerals comprise montmorillonite, quartz, mica and albite. When the raw ore contains 0.43 percent of Cu, 1.13g/t of Au and 11 percent of montmorillonite, under the condition that the crushing fineness of the raw ore is-2 mm and accounts for 99 percent, the grinding fineness of-106 mu m and accounts for more than 80 percent is obtained by grinding, the size mixing is carried out by saline water, the concentration of divalent calcium and magnesium ions in the saline water is 0.01mol/L, the viscosity of the ore pulp is controlled to be 10mPa & s, and the flotation adopts a chemical system through two times of rough concentration: collecting agent 40g/t is added in the first roughing step, foaming agent 20g/t is added in the second roughing step, collecting agent 20g/t and foaming agent 10g/t are added in the second roughing step, and foam products in the second roughing step are combined to obtain copper-gold concentrate. By adopting the flow and the medicament system, the original extremely difficult-to-select and easily-argillized copper sulfide gold ore which is difficult to perform flotation separation finally obtains the excellent indexes of 9.1 percent of copper concentrate grade, 82 percent of recovery rate, 10g/t of gold in the concentrate and 79 percent of gold.
Example 2
Compared with the example 1, the method is only different in that the concentration of the divalent calcium and magnesium ions in the brine is controlled to be 0.1mol/L, the viscosity of the ore pulp is controlled to be 8.4mPa & s, the dosage of the medicament is unchanged, the grade of the concentrate copper obtained by rough concentration is 12.2%, the recovery rate is 89%, and the gold in the concentrate is 12g/t, and the beneficiation index of 81%.
Example 3
Compared with the example 1, the method is only different in that the concentration of the divalent calcium and magnesium ions in the brine is controlled to be 1.0mol/L, the viscosity of the ore pulp is controlled to be 8.3mPa & s, the dosage of the medicament is unchanged, the grade of the concentrate copper obtained by rough concentration is 8.7%, the recovery rate is 87%, and the gold content in the concentrate is 9g/t, and the beneficiation index of 82%.
Comparative example 1
This comparative example discusses: the ore properties were the same as in example 1, except that the treatment was carried out using conventional groundwater, that after the ore was crushed and ground, the ground ore was ground to a fineness of-106 μm to 80% or more, and that the slurry conditioning was carried out without controlling the concentration of divalent cations in the brine. The concentration of the ore pulp in the flotation system is 33.33 percent, the viscosity of the ore pulp is controlled to be 87 mPa.s, and copper and gold concentrate is obtained through twice rough concentration and twice scavenging. The flotation adopts a chemical system as follows: collecting agent 40g/t is added in the first roughing step, foaming agent 20g/t is added in the second roughing step, collecting agent 20g/t and foaming agent 10g/t are added in the second roughing step, and foam products in the second roughing step are combined to obtain copper-gold concentrate. By adopting the process and the medicament system, the copper sulfide gold ore which is extremely difficult to select and easy to argillize is finally obtained, the copper concentrate grade is 5.3 percent, and the recovery rate is 68.2 percent.
Example 4
Flotation separation method for treating extremely difficult-to-separate easily-argillized copper sulfide gold ore
The gold ore of Qinghai gold contains 3.0g/t of gold, and also contains elements such as sulfur, iron, arsenic and the like, the main gangue minerals comprise quartz, feldspar, chlorite, montmorillonite, calcite and the like, the content of argillaceous minerals is more than 30%, after the ore is crushed and ground, the grinding fineness is 80% with minus 0.074mm, size mixing is carried out through saline water, the concentration of divalent calcium and magnesium ions in the saline water is 0.2mol/L, the viscosity of ore pulp is controlled to be 8 mPa.s, through twice rough concentration, the collecting agent is added into the rough concentration one by 60g/t, the foaming agent is 30g/t, the collecting agent is added into the rough concentration two by 30g/t, and the foaming agent is 15g/t, so that the original extremely difficult-to-separate and easily-argillized copper sulfide gold ore which is difficult to carry out flotation separation can finally obtain the gold ore concentrate grade of 18.2g/t, and the recovery rate.
Claims (7)
1. The application of metal ion brine in the flotation separation of extremely difficult-to-separate copper sulfide gold ores is characterized in that: in the flotation process of the extremely difficult-to-select copper sulfide gold ore without desliming pretreatment, divalent metal ion saline water is adopted to inhibit the argillization of fine-grained gangue minerals.
2. The use of a metal ion-containing brine in the flotation separation of extremely refractory copper sulfide gold ores according to claim 1, wherein: the concentration of the divalent metal ions in the divalent metal ion salt water is 0.01 mol/L-1.0 mol/L.
3. The use of a metal ion-containing brine in the flotation separation of extremely refractory copper sulfide gold ores according to claim 2, wherein: the divalent metal ions are magnesium ions and/or calcium ions.
4. The use of a metal ion-containing brine according to any one of claims 1 to 3 in the flotation separation of extremely refractory copper sulfide gold ores, characterized in that: the method comprises the following steps of mixing slurry of extremely difficult-to-select copper sulfide gold ores which are not subjected to desliming pretreatment with divalent metal ion brine to obtain ore slurry with the mass percentage concentration of 30% -35%, and performing flotation separation on the ore slurry by taking amyl xanthate as a flotation agent and isoamylol as a foaming agent to obtain copper gold concentrate.
5. The use of a metal ion-containing brine in the flotation separation of extremely refractory copper sulfide gold ores according to claim 4, wherein: the flotation separation comprises two times of rough concentration and three times of scavenging.
6. The use of a metal ion-containing brine in the flotation separation of extremely refractory copper sulfide gold ores according to claim 5, wherein:
the medicament system of the primary rough selection is as follows: 20-40 g/t of amyl xanthate and 10-20 g/t of isoamylol;
the secondary roughing medicament system is as follows: 10-20 g/t of amyl xanthate and 5-10 g/t of isoamylol;
the medicament system of the third scavenging is as follows: 5-15 g/t of amyl xanthate.
7. The use of a metal ion-containing brine in the flotation separation of extremely refractory copper sulfide gold ores according to claim 6, wherein: and controlling the pH value of the ore pulp system to be 9.0-9.5 in the primary roughing and the secondary roughing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011107349.7A CN112337654A (en) | 2020-10-16 | 2020-10-16 | Application of metal ion brine in flotation separation of copper sulfide gold ore difficult to separate |
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| CN202011107349.7A CN112337654A (en) | 2020-10-16 | 2020-10-16 | Application of metal ion brine in flotation separation of copper sulfide gold ore difficult to separate |
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Citations (6)
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|---|---|---|---|---|
| CN102764701A (en) * | 2011-05-05 | 2012-11-07 | 昆明理工大学 | Flotation method of highly argillaceous alkaline gangue copper oxide ore |
| CN102896047A (en) * | 2012-10-08 | 2013-01-30 | 湖南有色金属研究院 | Method for beneficiating high-peat copper sulphide ore |
| CN107824341A (en) * | 2017-10-25 | 2018-03-23 | 江西理工大学 | One kind improves difficult copper sulfide ore beneficiation and refers to calibration method |
| CN108160313A (en) * | 2017-12-21 | 2018-06-15 | 中南大学 | A kind of method of cupric oxide ore thickness grading-reinforcing fine fraction sulfide flotation |
| CN111229451A (en) * | 2020-01-20 | 2020-06-05 | 中南大学 | Flotation separation method of talc and chalcopyrite |
| CN111451003A (en) * | 2020-03-05 | 2020-07-28 | 铜陵有色金属集团股份有限公司 | Beneficiation method for copper-containing talc-serpentine ore easy to argillize and float |
-
2020
- 2020-10-16 CN CN202011107349.7A patent/CN112337654A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764701A (en) * | 2011-05-05 | 2012-11-07 | 昆明理工大学 | Flotation method of highly argillaceous alkaline gangue copper oxide ore |
| CN102896047A (en) * | 2012-10-08 | 2013-01-30 | 湖南有色金属研究院 | Method for beneficiating high-peat copper sulphide ore |
| CN107824341A (en) * | 2017-10-25 | 2018-03-23 | 江西理工大学 | One kind improves difficult copper sulfide ore beneficiation and refers to calibration method |
| CN108160313A (en) * | 2017-12-21 | 2018-06-15 | 中南大学 | A kind of method of cupric oxide ore thickness grading-reinforcing fine fraction sulfide flotation |
| CN111229451A (en) * | 2020-01-20 | 2020-06-05 | 中南大学 | Flotation separation method of talc and chalcopyrite |
| CN111451003A (en) * | 2020-03-05 | 2020-07-28 | 铜陵有色金属集团股份有限公司 | Beneficiation method for copper-containing talc-serpentine ore easy to argillize and float |
Non-Patent Citations (1)
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| 王冉: "粘土泥化抑制对煤泥浮选的影响", 《中国优秀硕士学位论文全文数据库工程科技1辑》 * |
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