CN112808464B - Method for reducing copper content of slag copper-dressing tailings - Google Patents
Method for reducing copper content of slag copper-dressing tailings Download PDFInfo
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- CN112808464B CN112808464B CN202011497754.4A CN202011497754A CN112808464B CN 112808464 B CN112808464 B CN 112808464B CN 202011497754 A CN202011497754 A CN 202011497754A CN 112808464 B CN112808464 B CN 112808464B
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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
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
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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
- B03D1/004—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
- B03D2201/02—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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—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
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Abstract
The invention belongs to the field of metal smelting, and particularly relates to a method for reducing copper content in slag copper-dressing tailings, which uses Fe/SiO in slag2The grinding fineness before mineral separation is adjusted according to the ratio; the dosage of the added medicament during ore dressing is adjusted according to the S/Cu ratio in the slag. By adopting the scheme, the embedding granularity of the copper minerals and the occurrence state of the copper minerals are preliminarily estimated through the iron-silicon ratio and the sulfur-copper ratio in the furnace slag, so that the ore grinding fineness of the furnace slag and the addition amount of the medicament during ore dressing are adjusted, the content of copper in the copper tailings of the furnace slag is greatly reduced, the waste of metal resources is reduced, and the economic benefit of an enterprise is improved.
Description
Technical Field
The invention belongs to the field of metal smelting, and particularly relates to a method for reducing the copper content of slag copper-dressing tailings.
Background
A large amount of slag is generated in the copper smelting process, wherein the lowest copper content is more than 0.5 percent, and the copper content can reach several percent or even more than ten percent due to different smelting processes. Most enterprises usually carry out beneficiation treatment on the slag to further realize the recycling of copper,
for mineral separation, the slag is an artificial ore, the phase composition, occurrence state and embedding relationship of the slag are extremely complex, the slag is closely related to a smelting process, and compared with natural ore, the copper content of slag mineral separation tailings is still higher, generally 0.25-0.3 percent, even higher. The main reasons for this are: copper minerals in the copper smelting slag have fine embedded particle size, so that the monomer is difficult to dissociate and the separation index is influenced. In addition, part of copper in the slag exists in the states of copper oxide, metallic copper and alloy, and the floatability of the part of copper is lower than that of copper sulfide minerals, so that the copper content of tailings is higher. At present, the monomer dissociation degree of copper minerals is improved by adopting slow cooling and fine grinding methods at home and abroad, but the improvement degree is still very limited because the copper minerals are too fine in embedded particle size, and the fine grinding fineness not only increases the grinding cost, but also can generate adverse effects on the selectivity of mineral flotation and subsequent dehydration; for oxidized minerals, sodium sulfide is usually added as an activator to improve the floatability of the minerals, but due to the uncertainty of the oxidized mineral content in the slag, there is often a case that the addition of an excessive amount of sodium sulfide rather exerts an inhibiting effect on the beneficiation of copper sulfide minerals.
The conditions of the beneficiation process vary depending on the material properties. The most influential to the properties of the copper smelting slag are the copper mineral disseminated particle size and the occurrence state of the copper mineral, namely the sulfide state or the oxide state or other states. Along with the increasingly fierce market competition, the properties of copper raw materials are increasingly complex and changeable, so that the corresponding smelting and slagging process can be changed to different degrees, and the occurrence state and the embedding characteristics of minerals in the slag are increasingly complex and changeable. Both properties can be known only through process mineralogy or phase analysis, and the analysis can not be carried out frequently in daily production, so that the relevant property change can not be mastered, and the corresponding measures for adjusting the process conditions can not be taken timely.
Disclosure of Invention
The invention aims to provide a method for reducing the copper content of slag copper-dressing tailings. In order to achieve the purpose, the invention adopts the technical scheme that: a method for reducing copper content in tailings of copper separation from slag comprises using Fe/SiO in slag2The grinding fineness before ore dressing is adjusted according to the ratio:
when (Fe/SiO)2) When the ore grinding fineness is more than or equal to 1.3, the ore grinding fineness is as follows: one-200 mesh (65-70)%, and two-325 mesh (70-75)%;
when 1.3>(Fe/SiO2) When the ore grinding fineness is more than or equal to 1.2, the ore grinding fineness is as follows: one section is 65-70 percent of-200 meshes, and the other section is 75-80 percent of-325 meshes;
when (Fe/SiO)2)<1.2 hours, grinding fineness: one section is 70-78% of a mesh, and the other section is 80-90% of a mesh;
the S/Cu ratio in the slag is used for adjusting the added medicament amount during ore dressing:
when (S/Cu) is more than or equal to 0.5, the medicament: xanthate (170-180) g/t, pine oil (70-75) g/t;
when 0.5> (S/Cu) ≥ 0.3, the dosage: xanthate (170-180) g/t, pine oil (70-75) g/t and sodium sulfide (50-100) g/t;
when (S/Cu) <0.3, the agent: 180-200 g/t of xanthate, 75-85 g/t of pine oil and 100-300 g/t of sodium sulfide.
By adopting the scheme, the embedding granularity of the copper minerals and the occurrence state of the copper minerals are preliminarily estimated through the iron-silicon ratio and the sulfur-copper ratio in the furnace slag, so that the ore grinding fineness of the furnace slag and the addition amount of the medicament during ore dressing are adjusted, the content of copper in the copper tailings of the furnace slag is greatly reduced, the waste of metal resources is reduced, and the economic benefit of an enterprise is improved.
The smelting slagging process produces low-silicon slag as far as possible, and the principle is as follows: in the molten state of the slag, under the action of surface tension, nearby homogeneous copper mineral particles are mutually combined, the aggregation grows, the silicon content is high, the formed vitreous body is large, the viscosity of the slag is high, the resistance of the copper mineral aggregation and combination is increased, and the copper mineral is dispersed, so that the particles are relatively fine and are dispersed in the vitreous body. Through experimental research, the ratio of iron to silicon dioxide of the slag is not less than 1.3, so that the requirement of ore dressing granularity can be met, and the smelting process is not greatly influenced. Therefore, it was confirmed that the iron-silicon ratio in the metallurgical slag was not less than 1.3. The lower the iron-silicon ratio, the finer the copper mineral disseminated particle size, and the finer the fineness of ore grinding required to dissociate its monomers.
The sulfur-copper ratio indirectly reflects the occurrence proportion of copper sulfide minerals, the sulfur-copper ratio is high, the copper sulfide ratio is correspondingly large, the sulfur-copper ratio is low, and the copper sulfide ratio is small, so that the corresponding adjustment of the medicament is considered.
When in slag (Fe/SiO)2)<1.2 and (S/C)u)<And 0.3, adding water glass during ore dressing. The grinding granularity is fine, the oxidation degree is high, and in order to reduce the pollution of fine particles to the mineral surface and the consumption of medicaments, the water glass is added to disperse the fine particles. Furthermore, the adding amount of the water glass is (200-500) g/t.
Detailed Description
The technical solution of the present application is further described below with reference to examples.
Example 1: by adopting the scheme of the invention
The ore dressing is carried out by adopting the processes of two-section ore grinding, secondary roughing, tertiary scavenging and tertiary concentrating which are commonly used in the prior art.
Determining Fe/SiO in slag before slag mineral separation2The ratio is 1.38, the S/Cu ratio is 0.75, and according to the scheme of the invention, (Fe/SiO)2) The grinding fineness before mineral separation is more than or equal to 1.3: one section is 65-70 percent of-200 meshes, and the other section is 70-75 percent of-325 meshes; the addition amount of the chemicals when (S/Cu) is more than or equal to 0.5 ore dressing is as follows: xanthate (170-180) g/t, pine oil (70-75) g/t. Therefore, the fineness of grinding is set to: 65 percent of one section with a mesh size of 200 meshes and 72 percent of the other section with a mesh size of 325 meshes, and the types and the dosage of the medicament are as follows: xanthate 174g/t and pine oil 72 g/t.
And after the ore dressing is finished, detecting that the copper content in the tailings is 0.18%.
Comparative example 1: by means of the prior art
The same mineral processing technology of two-section grinding, secondary roughing, tertiary scavenging and tertiary concentration as the example 1 is adopted, and the grinding fineness is set as follows: 66 percent of one section with a mesh size of 200 meshes and 74 percent of the other section with a mesh size of 325 meshes, and the types and the dosage of the medicaments are as follows: 178g/t of xanthate, 75g/t of pine oil and 50g/t of sodium sulfide. The copper content in the tailings after the ore dressing is finished is 0.23%.
Examples 2 to 9
Slag beneficiation was performed by the same method as in example 1, and finally, the copper content in the tailings was measured and recorded in table 1.
Comparative examples 2 to 9
The same procedure as in comparative example 1 was used for slag dressing, and finally the copper content in the tailings was determined and reported in table 1.
TABLE 1 beneficiation data for slag from examples and comparative examples
As can be seen from the data in Table 1, the scheme of the invention can actually reduce the copper content in the tailings, and compared with the prior art, the scheme reduces the waste of metal resources and improves the economic benefit of enterprises.
Claims (3)
1. A method for reducing the copper content of slag copper-dressing tailings is characterized by comprising the following steps:
by Fe/SiO in slag2The grinding fineness before ore dressing is adjusted according to the ratio:
when (Fe/SiO)2) When the grinding fineness is more than or equal to 1.3, the grinding fineness is as follows: one section is 65-70 percent of-200 meshes, and the other section is 70-75 percent of-325 meshes;
when 1.3>(Fe/SiO2) When the ore grinding fineness is more than or equal to 1.2, the ore grinding fineness is as follows: one section is 65-70 percent of-200 meshes, and the other section is 75-80 percent of-325 meshes;
when (Fe/SiO)2)<1.2 hours, grinding fineness: one section is 70-78% of a mesh, and the other section is 80-90% of a mesh;
the S/Cu ratio in the slag is used for adjusting the added medicament amount during ore dressing:
when (S/Cu) is more than or equal to 0.5, the medicament: xanthate (170-180) g/t, pine oil (70-75) g/t;
when 0.5> (S/Cu) ≥ 0.3, the dosage: xanthate (170-180) g/t, pine oil (70-75) g/t and sodium sulfide (50-100) g/t;
when (S/Cu) <0.3, the agent: 180-200 g/t of xanthate, 75-85 g/t of pine oil and 100-300 g/t of sodium sulfide.
2. The method for reducing the copper content in the slag copper-dressing tailings according to claim 1, which is characterized by comprising the following steps: when in slag (Fe/SiO)2)<1.2 and (S/Cu)<And 0.3, adding water glass during ore dressing.
3. The method for reducing the copper content of the slag copper-dressing tailings according to claim 2, which is characterized by comprising the following steps: the adding amount of the water glass is (200-500) g/t.
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| CN202011497754.4A CN112808464B (en) | 2020-12-17 | 2020-12-17 | Method for reducing copper content of slag copper-dressing tailings |
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| CN115889426A (en) * | 2022-11-09 | 2023-04-04 | 金隆铜业有限公司 | Method for reducing beneficiation difficulty of copper smelting furnace slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1309739A (en) * | 1970-03-17 | 1973-03-14 | Mitsubishi Metal Mining Co Ltd | Method of recovering copper from slag |
| SU1420962A1 (en) * | 1986-06-05 | 1996-09-27 | Государственный научно-исследовательский институт цветных металлов "Гинцветмет" | Process for treating copper-containing slags |
| CN102962142B (en) * | 2012-12-13 | 2014-12-17 | 中南大学 | Collecting agent for copper converter slag flotation and use method thereof |
| CN103667740B (en) * | 2013-12-13 | 2015-07-01 | 金隆铜业有限公司 | Automatic control system for copper converter converting |
| CN105435970B (en) * | 2015-12-28 | 2018-08-03 | 昆明理工大学 | A kind of ore-dressing technique of copper smelting-furnace slag flotation recycling copper |
| CN107282312B (en) * | 2017-06-20 | 2019-05-10 | 厦门紫金矿冶技术有限公司 | A kind of copper-sulphide ores sorting process that disseminated grain size is fine |
| CN109604048B (en) * | 2018-11-14 | 2020-09-08 | 铜陵有色金属集团股份有限公司 | Method for stepwise recovering metallic copper, copper sulfide and iron minerals in copper converter slag |
| CN110882834A (en) * | 2019-12-16 | 2020-03-17 | 江西理工大学应用科学学院 | Beneficiation method for efficiently recovering copper from copper smelting slag |
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