CN114074032B - By using H 2 O 2 Method for flotation separation of chalcopyrite and pyrite - Google Patents
By using H 2 O 2 Method for flotation separation of chalcopyrite and pyrite Download PDFInfo
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- CN114074032B CN114074032B CN202111289644.3A CN202111289644A CN114074032B CN 114074032 B CN114074032 B CN 114074032B CN 202111289644 A CN202111289644 A CN 202111289644A CN 114074032 B CN114074032 B CN 114074032B
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- chalcopyrite
- pyrite
- flotation
- ore pulp
- simulated seawater
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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
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
-
- 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
- B03D2203/04—Non-sulfide ores
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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 utilizing H 2 O 2 A method for separating chalcopyrite and pyrite by flotation belongs to the technical field of mineral processing. The method for separating the chalcopyrite and the pyrite by flotation comprises the following steps: s1, mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp; wherein the particle size of the chalcopyrite and the pyrite is less than 150 μm; s2, adjusting the pH value of the ore pulp to 7.5-9.0, and then adding H 2 O 2 Then adding a collecting agent, and then performing air flotation, wherein the flotation foam is the chalcopyrite. The method improves the grade and the recovery rate of the chalcopyrite, the highest yield of the concentrate is 55.01 percent, the highest grade of copper in the concentrate is 26.06 percent, and the highest recovery rate of the chalcopyrite is 90.05 percent.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a method for utilizing H 2 O 2 A method for separating chalcopyrite and pyrite by flotation.
Background
Copper resources are one of the most widely applied important basic raw materials in national economic development, are widely applied to the fields of electricity, light industry, mechanical manufacturing, building industry, national defense industry and the like, and are second only to aluminum in the consumption of nonferrous metal materials in China.
Chalcopyrite is an important copper-containing mineral, is obtained by a common flotation method, consumes a large amount of fresh water resources in the flotation process, and has a good application prospect by adopting seawater to replace fresh water as a flotation medium.
At present, the mainstream flotation scheme for separating copper and sulfur is to add a large amount of lime as an inhibitor to float chalcopyrite, the pH value is about 12, the foam viscosity is increased under the high-alkalinity condition, the grade and the recovery rate of the chalcopyrite are reduced, the flotation water can be continuously used or discharged after being treated, and the environmental protection cost is increased.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a method for utilizing H 2 O 2 A method for separating chalcopyrite and pyrite by flotation solves the technical problem of low chalcopyrite grade and recovery rate in the prior art.
To achieve the above technical objectThe technical scheme of the invention provides a method for utilizing H 2 O 2 The method for flotation separation of chalcopyrite and pyrite comprises the following steps:
s1, mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp; wherein the particle size of the chalcopyrite and the pyrite is less than 150 mu m;
s2, adjusting the pH value of the ore pulp to 7.5-9.0, and then adding H 2 O 2 Then adding a collecting agent, and then performing air flotation to obtain flotation foam which is the chalcopyrite.
Further, in step S2, the H 2 O 2 The concentration of (A) is 27.5% -35%.
Further, in step S2, the H 2 O 2 The adding amount of the mineral slurry is 0 to 0.1 percent of the volume of the mineral slurry.
Further, in the step S1, the material ratio of the total mass of the chalcopyrite and the pyrite to the simulated seawater is 1g.
Further, in step S2, the collector is butyl xanthate.
Further, the butyl xanthate is added according to the material ratio of 200-250g of the butyl xanthate to ore pulp, namely, 1t.
In step S1, the main components of the simulated seawater comprise 0.45-0.47mol/L NaCl,0.01-0.02mol/L KCl and 0.01-0.02mol/L CaCl 2 0.025-0.03mol/L MgCl 2 0.0018-0.002mol/L NaHCO 3 0.028 to 0.03mol/L of MgSO 4 And 0.00087-0.0009mol/L of KBr.
Further, in the step S2, the time of the aeration flotation is 10-15min.
Further, in step S2, pH of the pulp is adjusted to 7.5-9.0 with NaOH.
Furthermore, the concentration of the NaOH is 0.1-0.2mol/L.
Further, in step S2, H is added 2 O 2 And stirring for 5-10min.
Compared with the prior art, the invention has the beneficial effects that: mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp, wherein,the particle size of the chalcopyrite and the pyrite is less than 150 mu m; adjusting pH of the pulp to 7.5-9.0, wherein the pulp is weakly alkaline, and adding H with oxidation effect 2 O 2 Because the pyrite is easier to be oxidized than the chalcopyrite, metal ions on the surface of the pyrite are firstly oxidized and dissolved to generate a large amount of hydroxyl complexes, and the complexes are easier to be adsorbed on the surface of the pyrite, so that the hydrophilicity of the pyrite is increased, and the floatation of the pyrite is inhibited; at H 2 O 2 When the concentration is lower, the chalcopyrite cannot be oxidized, and a polysulfide layer is formed on the surface, so that the hydrophobicity of the chalcopyrite is enhanced, and the floatability of the chalcopyrite is further increased. Thereby improving the grade and the recovery rate of the chalcopyrite, the highest yield of the concentrate is 55.01 percent, the highest grade of the copper in the concentrate is 26.06 percent, and the highest recovery rate of the chalcopyrite is 90.05 percent.
Detailed Description
The present embodiment provides a method of using H 2 O 2 The method for flotation separation of chalcopyrite and pyrite comprises the following steps:
s1, mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp; wherein the particle size of the chalcopyrite and the pyrite is less than 150 μm; the material ratio of the total mass of the chalcopyrite and the pyrite to the simulated seawater is 1g; the main components of the simulated seawater comprise 0.45-0.47mol/L NaCl,0.01-0.02mol/L KCl and 0.01-0.02mol/L CaCl 2 0.025-0.03mol/L MgCl 2 0.0018-0.002mol/L NaHCO 3 0.028-0.03mol/L of MgSO 4 And 0.00087 to 0.0009mol/L of KBr;
s2, adjusting the pH value of the ore pulp to 7.5-9.0, stabilizing the pH value for 6-10min, and then adding an inhibitor H 2 O 2 Stirring for 5-10min, adding a collecting agent butyl xanthate according to the material ratio of 200-250g of butyl xanthate to ore pulp of 1t, and then performing air flotation for 10-15min to obtain flotation foam which is chalcopyrite; wherein, the H 2 O 2 The concentration is 27.5% -35%, and the H 2 O 2 The adding amount of the mineral slurry is 0 to 0.1 percent of the volume of the mineral slurry.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
After artificially crushing the chalcopyrite and the pyrite in the following examples, the chalcopyrite and the pyrite were ground using a three-head grinder to obtain particles having a particle size of less than 150 μm, the purity of the chalcopyrite in the chalcopyrite raw material was 91.9%, and the purity of the pyrite in the pyrite raw material was 98.93%. The mass ratio of the chalcopyrite to the pyrite is 1.
Example 1
This example proposes a method of utilizing H 2 O 2 The method for flotation separation of chalcopyrite and pyrite comprises the following steps:
s1, mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp; wherein the particle size of the chalcopyrite and the pyrite is less than 150 μm; the material ratio of the total mass of the chalcopyrite and the pyrite to the simulated seawater is 1g; the simulated seawater mainly comprises the following components: 0.47mol/L NaCl,0.01mol/L KCl,0.01mol/L CaCl 2 0.025 mol/L of MgCl 2 0.0018mol/L NaHCO 3 0.028mol/L MgSO 4 And 0.00087mol/L of KBr.
S2, adjusting the pH value of the ore pulp to 8.0, stabilizing the pH value for 6min, and then adding an inhibitor H 2 O 2 Stirring for 6min, adding the butyl xanthate according to the material ratio of the butyl xanthate to the ore pulp of 200g 1t, performing air flotation for 10min to obtain flotation foam which is chalcopyrite, performing solid-liquid separation on a product in a tank by using a filtration method to obtain concentrate and tailings, wherein the results are shown in table 1; wherein, the H 2 O 2 At a concentration of 35%, said H 2 O 2 The addition amount of (A) is 0.05% of the volume of the ore pulp.
Example 2
This example proposes a method of utilizing H 2 O 2 The method for flotation separation of chalcopyrite and pyrite comprises the following steps:
s1, mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp; wherein, brassThe particle size of the ore and the pyrite is less than 150 mu m; the material ratio of the total mass of the chalcopyrite and the pyrite to the simulated seawater is 1g; the simulated seawater mainly comprises the following components: 0.46mol/L NaCl,0.015mol/L KCl,0.015mol/L CaCl 2 0.025 mol/L of MgCl 2 0.002mol/L NaHCO 3 0.03mol/L of MgSO 4 And 0.0009mol/L of KBr.
S2, adjusting the pH value of the ore pulp to 7.5, stabilizing the pH value for 10min, and then adding an inhibitor H 2 O 2 Stirring for 10min, adding the butyl xanthate according to a material ratio of 250g of the butyl xanthate to ore pulp, performing air flotation for 15min to obtain flotation froth of chalcopyrite and products in a tank of pyrite, and performing solid-liquid separation by a filtration method to obtain concentrate and tailings, wherein the results are shown in table 1; wherein, the H 2 O 2 At a concentration of 30%, said H 2 O 2 Is added in an amount of 0.025 percent of the volume of the ore pulp.
Example 3
This example proposes a method of utilizing H 2 O 2 The method for flotation separation of chalcopyrite and pyrite comprises the following steps:
s1, mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp; wherein the particle size of the chalcopyrite and the pyrite is less than 150 mu m; the material ratio of the total mass of the chalcopyrite and the pyrite to the simulated seawater is 1g; the simulated seawater mainly comprises the following components: 0.45mol/L NaCl,0.02mol/L KCl,0.01mol/L CaCl 2 0.027 mol/L of MgCl 2 0.0019mol/L NaHCO 3 0.028mol/L MgSO 4 And 0.00089mol/L of KBr.
S2, adjusting the pH value of the ore pulp to 9.0, stabilizing the pH value for 8min, and then adding an inhibitor H 2 O 2 Stirring for 5min, adding the butyl xanthate according to the material ratio 220g 1t of the butyl xanthate to the ore pulp, performing air flotation for 12min to obtain a flotation foam which is chalcopyrite, wherein a product in the tank is pyrite, performing solid-liquid separation by a filtration method to obtain concentrate and tailings, and the results are shown in table 1; wherein, the H 2 O 2 At a concentration of 27.5%, said H 2 O 2 Is added withThe input amount is 0.06 percent of the volume of the ore pulp.
Comparative example 1
This comparative example differs from example 1 only by the addition of H 2 O 2 The amount of addition was 1% by volume of the pulp and the results are shown in table 1.
Comparative example 2
This comparative example is different from example 1 only in that fresh water is used instead of simulated seawater, and the results are shown in table 1.
Comparative example 3
This comparative example differs from example 1 only in that no H was added 2 O 2 The results are shown in Table 1.
TABLE 1 results of beneficiation test for examples 1 to 3 and comparative examples 1 to 3
| Yield of concentrate/% | Copper grade/% | Percent recovery of chalcopyrite% | |
| Example 1 | 55.01 | 26.06 | 90.05 |
| Example 2 | 57.12 | 24.43 | 87.65 |
| Example 3 | 55.23 | 23.59 | 81.84 |
| Comparative example 1 | 25.24 | 18.52 | 29.36 |
| Comparative example 2 | 54.48 | 23.07 | 78.95 |
| Comparative example 3 | 62.83 | 19.55 | 77.16 |
As can be seen from Table 1, the flotation method provided by the invention has the advantages that the recovery rate of the chalcopyrite is high, the copper grade is greatly improved, the recovery rate and the copper grade of the chalcopyrite in the comparative example 1 are very low, the flotation separation of copper and sulfur cannot be realized, and the condition that the concentration H is too high is shown 2 O 2 Mineral flotation is severely inhibited. Comparative example 2 shows that the separation effect of simulated seawater on copper-sulfur flotation is better than that of fresh water, and comparative example 3 shows that H is not added 2 O 2 In the process, the chalcopyrite and the pyrite are simultaneously floated into the concentrate, and the inhibition effect on the chalcopyrite is lacked, so that the recovery rate of the chalcopyrite in the concentrate is low, and the copper grade is also very low.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. By using H 2 O 2 The method for separating the chalcopyrite and the pyrite by flotation is characterized by comprising the following steps:
s1, mixing chalcopyrite, pyrite and simulated seawater to obtain ore pulp; wherein the particle size of the chalcopyrite and the pyrite is less than 150 μm;
s2, adjusting the pH value of the ore pulp to 7.5-9.0 by using NaOH, and then adding H 2 O 2 Then adding a collecting agent, then performing air flotation to obtain flotation froth of chalcopyrite, and in step S2, the H 2 O 2 In the concentration of 27.5% -35%, in step S2, the H is 2 O 2 The adding amount of the simulated seawater is 0.05 percent of the volume of the ore pulp, the concentration of the NaOH is 0.1-0.2mol/L, and in the step S1, the components of the simulated seawater comprise 0.45-0.47mol/L NaCl,0.01-0.02mol/L KCl,0.01-0.02mol/L CaCl2, 0.025-0.03mol/L MgCl2, and 0.0018-0.002mol/L NaHCO 2 3 0.028 to 0.03mol/L MgSO4 and 0.00087 to 0.0009mol/L KBr.
2. The method for flotation separation of chalcopyrite and pyrite as claimed in claim 1, wherein in step S1, the total mass of the chalcopyrite and the pyrite to the material ratio of simulated seawater is 1g:25-30mL.
3. The method for flotation separation of chalcopyrite from pyrite according to claim 1, wherein in step S2, the collector is butyl xanthate.
4. The method for flotation separation of chalcopyrite and pyrite according to claim 3, wherein the butyl xanthate is added according to a material ratio of 200-250g:1t of the butyl xanthate to pulp.
5. The process for flotation separation of chalcopyrite from pyrite according to claim 1, wherein in step S2, the aerated flotation time is 10-15min.
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| CN113333177A (en) * | 2021-05-20 | 2021-09-03 | 中国恩菲工程技术有限公司 | Combined inhibitor for separating copper sulfide ore containing secondary copper and separation method |
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| PE20130503A1 (en) * | 2009-12-04 | 2013-04-22 | Barrick Gold Corp | SEPARATION OF COPPER MINERALS FROM PYRITE USING AN AIR-METABISULPHITE TREATMENT |
| WO2013110420A1 (en) * | 2012-01-27 | 2013-08-01 | Evonik Degussa Gmbh | Enrichment of metal sulfide ores by oxidant assisted froth flotation |
| CN105344494B (en) * | 2015-12-08 | 2018-01-16 | 中南大学 | The beneficiation method of low-grade copper sulfide ores under a kind of low alkalinity |
| CN105597912B (en) * | 2016-02-02 | 2018-08-31 | 铜陵有色金属集团股份有限公司 | Chalcopyrite and marcasite, the separation method of pyrite in a kind of copper, sulphur ore |
| CN112642576B (en) * | 2020-09-17 | 2022-02-01 | 中南大学 | Selective oxidation and flotation separation method for pyrite gangue in sulfide ore |
| CN112973968B (en) * | 2021-02-04 | 2021-12-24 | 中南大学 | Flotation reagent and flotation separation method for pyrite-chalcopyrite |
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