CN113798050A - Beneficiation method for silver-lead-zinc ore - Google Patents
Beneficiation method for silver-lead-zinc ore Download PDFInfo
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- CN113798050A CN113798050A CN202110914435.7A CN202110914435A CN113798050A CN 113798050 A CN113798050 A CN 113798050A CN 202110914435 A CN202110914435 A CN 202110914435A CN 113798050 A CN113798050 A CN 113798050A
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- Prior art keywords
- silver
- lead
- roughing
- zinc
- ore
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- 238000000034 method Methods 0.000 title claims abstract description 16
- HJCRDHDDIDLLGZ-UHFFFAOYSA-N [Zn].[Ag].[Pb] Chemical compound [Zn].[Ag].[Pb] HJCRDHDDIDLLGZ-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000005188 flotation Methods 0.000 claims abstract description 35
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 32
- LWUVWAREOOAHDW-UHFFFAOYSA-N lead silver Chemical compound [Ag].[Pb] LWUVWAREOOAHDW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 32
- 239000011701 zinc Substances 0.000 claims abstract description 32
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052709 silver Inorganic materials 0.000 claims abstract description 25
- 239000004332 silver Substances 0.000 claims abstract description 25
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 23
- 239000011707 mineral Substances 0.000 claims abstract description 23
- 239000012141 concentrate Substances 0.000 claims abstract description 11
- 230000002000 scavenging effect Effects 0.000 claims description 13
- 239000011133 lead Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
- B03B5/34—Applications of hydrocyclones
Abstract
The invention provides a beneficiation method for silver-lead-zinc ore, which directly carries out primary silver-lead flotation (roughing) after the first stage of ore grinding so as to realize that part of valuable minerals easy to sort can be collected earlier and collected first, thereby avoiding unnecessary regrinding and overpolishing and optimizing sorting. After the silver-lead flotation is carried out, the ball mill is adopted to carry out the second stage of ore grinding, the recovery rate of silver in the silver-lead concentrate is improved, the silver content in the zinc concentrate is reduced, and the ore dressing index can be greatly improved.
Description
Technical Field
The invention belongs to the technical field of beneficiation, and particularly relates to a beneficiation method for silver-lead-zinc ores.
Background
China is a large lead and zinc resource country, and the resource reserves, the yield, the consumption and the export of the lead and zinc resource country are in the forefront of the world, have important influence on the world and occupy extremely important positions. However, in recent years, with the vigorous exploitation of mineral resources, the resources of lead and zinc, which are easy to select, high in grade and single in variety, are decreasing, and a large amount of lead and zinc ores, which are difficult to select and contain many metals, are increasing. In the existing ore dressing process, flotation is carried out after ore grinding, lead and silver valuable minerals are not well utilized, only the recovery of silver is emphasized, the grade of lead concentrate is mostly lower than 10%, the recovery rate of zinc is basically only about 25% (the fineness of ore grinding is too coarse and not going, the fineness-200 meshes is over 70%, and the ore dressing index is reduced after over 70%), unnecessary regrinding is caused, and the regrinding is possibly caused to be too fine to deteriorate the sorting, (here, part of the minerals which do not need regrinding can be well floated in the case of coarse grains), meanwhile, a hydrocyclone is used in the second stage of ore grinding and grading process, because the proportion of the silver-lead minerals is large, although the particles are small, the small-particle heavy minerals can also partially enter the hydrocyclone for sand settling and then enter a grinder for regrinding, and the silver-lead with high grade and easy to float is easily repeatedly regrinding to cause unnecessary regrinding, further worsening the sorting.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a beneficiation method for silver-lead-zinc ores. The technical problem to be solved by the invention is realized by the following technical scheme:
the beneficiation method of the silver-lead-zinc ore comprises the following steps:
step 1, carrying out primary grinding on silver, lead and zinc raw ores by adopting a ball mill and grading by adopting a grader to obtain ore pulp with the fineness of-200 meshes and 57%;
step 2, performing first silver-lead roughing on the ore pulp;
step 3, grading the tailings after the first silver-lead roughing by using a hydrocyclone, wherein fine-grained mineral aggregate directly enters the second silver-lead roughing, coarse-grained mineral aggregate is conveyed to an overflow ball mill for second ore grinding until the granularity reaches 78 percent, and then performing second silver-lead roughing;
step 4, combining the mineral aggregate obtained by the first lead and silver roughing and the mineral aggregate obtained by the second lead and silver roughing, and carrying out concentration for four times, and carrying out scavenging twice on the tailings obtained after the second lead and silver roughing to obtain lead and silver tailings;
step 5, performing zinc roughing on the silver-lead tailings;
step 6, carrying out four-time concentration on the mineral aggregate after the zinc roughing to obtain zinc concentrate; performing four times of scavenging on the tailings after the zinc roughing to obtain zinc tailings;
wherein all middlings in the steps 1 to 6 are returned in sequence.
In one embodiment of the invention, four flotation machines are adopted for the first silver-lead roughing and the second silver-lead roughing.
In one embodiment of the invention, 3 flotation machines are adopted for the two times of scavenging in the step 4.
In one embodiment of the invention, the number ratio of the flotation machines adopted in the step 4 in the four-time concentration is 2:2:1: 1.
In one embodiment of the present invention, four flotation machines are used for the zinc roughing in the step 5.
In one embodiment of the invention, the number ratio of the flotation machines adopted in the first concentration, the second concentration and the fourth concentration in the four-time concentration in the step 6 is 2:1:1, and the number ratio of the flotation machines adopted in the four-time scavenging is 3:3:3: 3.
The invention has the beneficial effects that:
according to the invention, the first stage of ore grinding is directly followed by the first silver-lead flotation (roughing), so that part of valuable minerals easy to sort can be collected earlier, thereby avoiding unnecessary regrinding and overpolishing, and optimizing sorting. After the silver-lead flotation is carried out, the ball mill is adopted to carry out the second stage of ore grinding, the recovery rate of silver in the silver-lead concentrate is improved, the silver content in the zinc concentrate is reduced, and the ore dressing index can be greatly improved.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a flow chart of a beneficiation method for a silver-lead-zinc ore provided by the invention.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example one
As shown in fig. 1, the embodiment provides a method for beneficiation of silver-lead-zinc ore, which includes the following steps:
step 1, carrying out primary grinding on the silver-lead-zinc raw ore by adopting a ball mill and grading by adopting a grader to obtain ore pulp with the fineness of-200 meshes and 57%.
Step 2, carrying out first-time silver-lead roughing on the ore pulp; four flotation machines are adopted for the first silver lead roughing.
And 3, grading the tailings after the first silver-lead roughing by using a hydrocyclone, wherein fine-grained mineral aggregate directly enters the second silver-lead roughing, coarse-grained mineral aggregate is conveyed to an overflow ball mill for second ore grinding until the granularity reaches 78 percent, and then the second silver-lead roughing is carried out.
And 4, combining the mineral aggregate obtained by the first lead and silver roughing and the mineral aggregate obtained by the second lead and silver roughing, and carrying out concentration for four times, and carrying out scavenging twice on the tailings obtained after the second lead and silver roughing to obtain the lead and silver tailings. In the step, 3 flotation machines are adopted for two times of scavenging, and the number ratio of the flotation machines adopted for four times of concentration in sequence is 2:2:1: 1.
And 5, performing zinc roughing on the silver-lead tailings. Four flotation machines are adopted for the zinc roughing in the step.
Step 6, carrying out four-time concentration on the mineral aggregate after the zinc roughing to obtain zinc concentrate; performing four times of scavenging on the tailings after the zinc roughing to obtain zinc tailings;
wherein all middlings in the steps 1 to 6 are returned in sequence. In the step, the number ratio of the flotation machines adopted in the first concentration, the second concentration and the fourth concentration in the four-time fine separation is 2:1:1, and the number ratio of the flotation machines adopted in the four-time scavenging is 3:3:3: 3. And (6) finally dehydrating the zinc concentrate in the step 6.
In this embodiment, RJ25 is used for both silver-lead flotation and zinc flotation mixing tanks; an XCF16/KYF16 flotation machine is used for roughing and scavenging; the selection is carried out by an XCF8/KYF8 flotation machine.
In the embodiment, silver-lead flotation (roughing) is directly carried out after the first-stage ore grinding, so that part of valuable minerals easy to sort can be collected earlier, unnecessary regrinding and overpolishing are avoided, and sorting is optimized. After the silver-lead flotation is carried out, the ball mill is adopted to carry out the second stage of ore grinding, the recovery rate of silver in the silver-lead concentrate is improved, the silver content in the zinc concentrate is reduced, and the ore dressing index can be greatly improved.
In one possible implementation, the chemical system of the separation process in the grinding stage is shown in table 3, and the production results of stage grinding stage flotation and conventional grinding flotation are compared:
TABLE 1 conventional two-stage grinding flotation results
Table 2 production results of stage grinding stage flotation the production results of stage grinding stage flotation were compared to conventional two stage grinding flotation results:
under the condition of similar other indexes, the recovery rate of silver is improved by 4 recovery rates; the recovery rate of lead is improved by 1.06 recovery rates; particularly, the recovery rate of zinc is improved by 24.68 recovery rates, and the index is greatly improved.
TABLE 3
Wherein, in the lead-silver mixed floating section, no medicament is adopted for lead concentration 4.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (6)
1. The beneficiation method of the silver-lead-zinc ore is characterized by comprising the following steps:
step 1, carrying out primary grinding on silver, lead and zinc raw ores by adopting a ball mill and grading by adopting a grader to obtain ore pulp with the fineness of-200 meshes and 57%;
step 2, performing first silver-lead roughing on the ore pulp;
step 3, grading the tailings after the first silver-lead roughing by using a hydrocyclone, wherein fine-grained mineral aggregate directly enters the second silver-lead roughing, coarse-grained mineral aggregate is conveyed to an overflow ball mill for second ore grinding until the granularity reaches 78 percent, and then performing second silver-lead roughing;
step 4, combining the mineral aggregate obtained by the first lead and silver roughing and the mineral aggregate obtained by the second lead and silver roughing, and carrying out concentration for four times, and carrying out scavenging twice on the tailings obtained after the second lead and silver roughing to obtain lead and silver tailings;
step 5, performing zinc roughing on the silver-lead tailings;
step 6, carrying out four-time concentration on the mineral aggregate after the zinc roughing to obtain zinc concentrate; performing four times of scavenging on the tailings after the zinc roughing to obtain zinc tailings;
wherein all middlings in the steps 1 to 6 are returned in sequence.
2. The beneficiation method for the silver-lead-zinc ore according to claim 1, wherein four flotation machines are adopted for the first silver-lead roughing and the second silver-lead roughing.
3. The beneficiation method for the silver-lead-zinc ore according to claim 1, wherein 3 flotation machines are adopted in the two times of scavenging in the step 4.
4. The beneficiation method for the silver-lead-zinc ore according to claim 1, wherein the number ratio of flotation machines adopted in the step 4 in four-time concentration is 2:2:1: 1.
5. The beneficiation method for the silver-lead-zinc ore according to claim 1, wherein four flotation machines are adopted for the zinc roughing in the step 5.
6. The method for beneficiation of silver, lead and zinc ores according to claim 1, wherein in the step 6, the number ratio of the flotation machines used for the first beneficiation, the second beneficiation and the fourth beneficiation in the four beneficiaries is 2:1:1, and the number ratio of the flotation machines used for the four scavenging is 3:3:3: 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110914435.7A CN113798050A (en) | 2021-08-10 | 2021-08-10 | Beneficiation method for silver-lead-zinc ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110914435.7A CN113798050A (en) | 2021-08-10 | 2021-08-10 | Beneficiation method for silver-lead-zinc ore |
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| CN113798050A true CN113798050A (en) | 2021-12-17 |
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| CN202110914435.7A Pending CN113798050A (en) | 2021-08-10 | 2021-08-10 | Beneficiation method for silver-lead-zinc ore |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545963A (en) * | 1982-09-29 | 1985-10-08 | Sherritt Gordon Mines Limited | Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore |
| CN103041924A (en) * | 2012-12-26 | 2013-04-17 | 云南澜沧铅矿有限公司 | Beneficiation process of recovering associated silver from lead-zinc-sliver sulfide ore |
| CN106269267A (en) * | 2016-09-29 | 2017-01-04 | 内蒙古东升庙矿业有限责任公司 | A kind of beneficiation method of lead zinc-silver polymetallic ore |
| CN107774456A (en) * | 2017-11-12 | 2018-03-09 | 南京银茂铅锌矿业有限公司 | Post machine joint is segmented asynchronous coarse concentrate regrinding and selects lead method |
| CN109833978A (en) * | 2019-03-28 | 2019-06-04 | 广东省资源综合利用研究所 | A method of improving silver lead zinc ore argentalium mineral processing index |
-
2021
- 2021-08-10 CN CN202110914435.7A patent/CN113798050A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545963A (en) * | 1982-09-29 | 1985-10-08 | Sherritt Gordon Mines Limited | Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore |
| CN103041924A (en) * | 2012-12-26 | 2013-04-17 | 云南澜沧铅矿有限公司 | Beneficiation process of recovering associated silver from lead-zinc-sliver sulfide ore |
| CN106269267A (en) * | 2016-09-29 | 2017-01-04 | 内蒙古东升庙矿业有限责任公司 | A kind of beneficiation method of lead zinc-silver polymetallic ore |
| CN107774456A (en) * | 2017-11-12 | 2018-03-09 | 南京银茂铅锌矿业有限公司 | Post machine joint is segmented asynchronous coarse concentrate regrinding and selects lead method |
| CN109833978A (en) * | 2019-03-28 | 2019-06-04 | 广东省资源综合利用研究所 | A method of improving silver lead zinc ore argentalium mineral processing index |
Non-Patent Citations (2)
| Title |
|---|
| 《选矿手册》编辑委员会: "《浮选手册 第三卷第二分册》", 31 October 1993, 冶金工业出版社 * |
| 李怀先 等: "《世界铅锌矿山实录》", 31 December 1990, 中国有色金属工业总公司铅锌局 * |
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