CN113262872A - Method for reducing gold grade of gold-dressing tailings - Google Patents
Method for reducing gold grade of gold-dressing tailings Download PDFInfo
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- CN113262872A CN113262872A CN202011162381.5A CN202011162381A CN113262872A CN 113262872 A CN113262872 A CN 113262872A CN 202011162381 A CN202011162381 A CN 202011162381A CN 113262872 A CN113262872 A CN 113262872A
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- gold
- tailings
- flotation
- reducing
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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
- 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
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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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
- B03D1/02—Froth-flotation processes
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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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/025—Precious metal ores
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for reducing gold grade of gold-dressing tailings, which comprises the steps of flotation, wherein gold ore dressing is recovered through flotation to form tailings; reselecting, namely reselecting and recovering the tailings by using a centrifugal concentrator; and (4) separating, namely separating the reselected tailings into reselected concentrate and reselected tailings. Compared with the prior art, the method for reducing the gold grade of the gold-dressing tailings has the advantages of simple process, low operation cost and high recovery rate.
Description
Technical Field
The invention relates to the technical field of tailing recovery, in particular to a method for reducing the gold grade of gold dressing tailings.
Background
Gold has the properties of affinity to sulfur, copper and iron, and is commonly symbiotic with sulfides in nature, particularly with pyrite, raw ores are fully ground to separate gold from sulfur in order to improve the recovery rate of gold, the ground gold raw ores are recovered by a flotation method, but the gold grade in tailings is always high, so that a part of gold is not recovered, and the utilization value of gold is reduced along with the loss of the tailings. How to efficiently recover the gold in the tailings and improving the gold recovery rate become difficult problems in the industry.
Usually, a shaking table, a chute and the like are used for gravity separation equipment to collect gold. In the process of high-sulfur gold ore dressing, most of gold closely symbiotic with sulfide is recovered by flotation, but because part of monomer gold and intergrowth gold exist, the part of gold has higher specific gravity and does not form stable mineralized foam with the sulfide, the gold in tailings is higher in grade, the gold runs off along with the tailings, and the recovery rate is reduced
Therefore, there is a need to provide a new method for reducing the gold grade of gold tailings, so as to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a novel method for reducing the gold grade of gold tailings, which has the advantages of simple process, low operation cost and high recovery rate.
In order to achieve the purpose, the invention provides a method for reducing the gold grade of gold tailings, which comprises the following steps:
flotation, namely, gold ore dressing is recovered through flotation to form tailings;
reselecting, namely reselecting and recovering the tailings by using a centrifugal concentrator;
and (4) separating, namely separating the reselected tailings into reselected concentrate and reselected tailings.
Further, the centrifugal separator adopts a Nielsen centrifugal separator.
Further, the flotation comprises:
crushing, namely crushing and grinding the ore until the granularity is 0.07-0.1mm and accounts for 70% -80%;
grinding the raw ore, adding an ore pulp pH regulator and a mining filling body inhibitor during grinding, adding water for size mixing until the concentration is 35-45% and the pH value of the ore pulp is 5.5-7.0;
and (3) flotation and capture, namely adding 80-320g/t of collecting agent into the ore pulp treated in the previous process, adding 20-60g/t of foaming agent, and obtaining gold fine powder ore and tailings after flotation and collection.
Further, the collector comprises one or more of a buthanium nigrum, an ethyl xanthate, and a pentyl xanthate.
Further, the foaming agent includes one or more of a terpineol oil and an ether alcohol based foaming agent.
Compared with the prior art, the method for reducing the gold grade of the gold concentration tailings utilizes the Nielsen centrifugal concentrator to reselect so that the gold can be separated from gangue, gold concentrate is reselected, the defect that the flotation cannot be recovered due to the fact that the specific gravity of gold is large is overcome, the gold grade in the tailings is reduced due to the recovery of monomer and intergrowth gold, and the recovery rate of gold is improved; the method has the advantages of simple and reliable process flow, easy operation and management, high-efficiency recovery of the monomer and the intergrowth gold in the tailings, reduction of the gold grade in the tailings from 0.6g/t to 0.2g/t, and full utilization of gold resources.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:
FIG. 1 is a flow chart of the method for reducing the gold grade of gold tailings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a method for reducing gold grade of gold tailings, comprising:
flotation, namely, gold ore dressing is recovered through flotation to form tailings; the flotation comprises the following steps: crushing, namely crushing and grinding the ore until the granularity is 0.07-0.1mm and accounts for 70% -80%; grinding the raw ore, adding an ore pulp pH regulator and a mining filling body inhibitor during grinding, adding water for size mixing until the concentration is 35-45% and the pH value of the ore pulp is 5.5-7.0; and (3) flotation and capture, namely adding 80-320g/t of collecting agent into the ore pulp treated in the previous process, adding 20-60g/t of foaming agent, and obtaining gold fine powder ore and tailings after flotation and collection. The collector comprises one or more of a butylammonium black, an ethyl xanthate, and a pentyl xanthate. The foaming agent comprises one or more of terpineol oil and ether alcohol foaming agent.
And (2) reselecting, namely reselecting and recovering the tailings by using a centrifugal separator, wherein the centrifugal separator adopts a Nielson centrifugal separator, reselecting and recovering by using a high-power gravity field generated by high-speed rotation of the Nielson centrifugal separator, and separating by using the specific gravity difference between the monomer and intergrowth gold and the gangue minerals, so that the gold is enriched and recovered, and the recovery rate of the gold is improved.
And (4) separating, namely separating the reselected tailings into reselected concentrate and reselected tailings. And recovering the concentrate after reselection, wherein the tailings after reselection can be recycled or treated to improve the recovery rate of gold.
Compared with the prior art, the method for reducing the gold grade of the gold concentration tailings utilizes the Nielsen centrifugal concentrator to reselect so that the gold can be separated from gangue, gold concentrate is reselected, the defect that the flotation cannot be recovered due to the fact that the specific gravity of gold is large is overcome, the gold grade in the tailings is reduced due to the recovery of monomer and intergrowth gold, and the recovery rate of gold is improved; the method has the advantages of simple and reliable process flow, easy operation and management, high-efficiency recovery of the monomer and the intergrowth gold in the tailings, reduction of the gold grade in the tailings from 0.6g/t to 0.2g/t, and full utilization of gold resources.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A method for reducing the gold grade of gold dressing tailings is characterized by comprising the following steps:
flotation, namely, gold ore dressing is recovered through flotation to form tailings;
reselecting, namely reselecting and recovering the tailings by using a centrifugal concentrator;
and (4) separating, namely separating the reselected tailings into reselected concentrate and reselected tailings.
2. The method for downgrading gold from a gold tailings according to claim 1 wherein the centrifugal concentrator uses a nielsen centrifugal concentrator.
3. The method for reducing the gold grade of gold tailings of claim 1 wherein, in one of said steps, said flotation comprises:
crushing, namely crushing and grinding the ore until the granularity is 0.07-0.1mm and accounts for 70% -80%;
grinding the raw ore, adding an ore pulp pH regulator and a mining filling body inhibitor during grinding, adding water for size mixing until the concentration is 35-45% and the pH value of the ore pulp is 5.5-7.0;
and (3) flotation and capture, namely adding 80-320g/t of collecting agent into the ore pulp treated in the previous process, adding 20-60g/t of foaming agent, and obtaining gold fine powder ore and tailings after flotation and collection.
4. The method of reducing the gold grade of gold concentrator tailings of claim 3 wherein the collector comprises one or more of a butylammonium black reagent, an ethyl xanthate reagent, and a pentyl xanthate reagent.
5. The method for reducing the gold grade of gold tailings of claim 3 wherein the foaming agent comprises one or more of a terpineol oil and an ether alcohol based foaming agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162381.5A CN113262872A (en) | 2020-10-27 | 2020-10-27 | Method for reducing gold grade of gold-dressing tailings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162381.5A CN113262872A (en) | 2020-10-27 | 2020-10-27 | Method for reducing gold grade of gold-dressing tailings |
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| CN113262872A true CN113262872A (en) | 2021-08-17 |
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| CN202011162381.5A Pending CN113262872A (en) | 2020-10-27 | 2020-10-27 | Method for reducing gold grade of gold-dressing tailings |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974451A (en) * | 2012-10-12 | 2013-03-20 | 金川集团股份有限公司 | Method for improving recovery rate of copper nickel associated precious metals |
| CN104846195A (en) * | 2015-05-15 | 2015-08-19 | 西北矿冶研究院 | Method for recovering low-grade precious metal from mineral dressing tailings |
| CN105797841A (en) * | 2014-12-29 | 2016-07-27 | 北京有色金属研究总院 | Beneficiation process for increasing recovery rate of gold of refractory gold ores |
| CN110292990A (en) * | 2019-07-11 | 2019-10-01 | 河南省岩石矿物测试中心 | Method for improving gold recovery rate and beneficiation efficiency |
-
2020
- 2020-10-27 CN CN202011162381.5A patent/CN113262872A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974451A (en) * | 2012-10-12 | 2013-03-20 | 金川集团股份有限公司 | Method for improving recovery rate of copper nickel associated precious metals |
| CN105797841A (en) * | 2014-12-29 | 2016-07-27 | 北京有色金属研究总院 | Beneficiation process for increasing recovery rate of gold of refractory gold ores |
| CN104846195A (en) * | 2015-05-15 | 2015-08-19 | 西北矿冶研究院 | Method for recovering low-grade precious metal from mineral dressing tailings |
| CN110292990A (en) * | 2019-07-11 | 2019-10-01 | 河南省岩石矿物测试中心 | Method for improving gold recovery rate and beneficiation efficiency |
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Application publication date: 20210817 |