CN116637726B - A combined inhibitor of lead-zinc oxide ore in lead-zinc sulfide tailings and its application - Google Patents
A combined inhibitor of lead-zinc oxide ore in lead-zinc sulfide tailings and its applicationInfo
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- CN116637726B CN116637726B CN202310365583.7A CN202310365583A CN116637726B CN 116637726 B CN116637726 B CN 116637726B CN 202310365583 A CN202310365583 A CN 202310365583A CN 116637726 B CN116637726 B CN 116637726B
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- lead
- zinc
- zinc oxide
- tailings
- ore
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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
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
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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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- 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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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明涉及一种铅锌硫硫化尾矿中氧化铅锌矿的组合抑制剂及其应用，属于氧化铅锌矿选矿技术领域，本发明组合抑制剂包括氟硅酸钠、硫化钠、腐殖酸钠，所述氟硅酸钠、硫化钠、腐殖酸钠的质量之比为2:5:1，本发明还包括将组合抑制剂应用于铅锌硫硫化尾矿中氧化铅锌矿反浮选回收工艺。本发明采用的组合抑制剂及反浮选工艺，在保证浮选回收效果的基础上实现了氧化铅与氧化锌的同步回收，具有流程简单，设备投资少等优点。
The present invention relates to a combined inhibitor for lead-zinc oxide ore in lead-zinc sulfide tailings and its application, belonging to the technical field of lead-zinc oxide ore beneficiation. The combined inhibitor comprises sodium fluorosilicate, sodium sulfide, and sodium humate, wherein the mass ratio of the sodium fluorosilicate, sodium sulfide, and sodium humate is 2:5:1. The present invention also includes applying the combined inhibitor to a reverse flotation recovery process for lead-zinc oxide ore in lead-zinc sulfide tailings. The combined inhibitor and reverse flotation process employed in the present invention achieve simultaneous recovery of lead oxide and zinc oxide while ensuring flotation recovery efficiency, and have the advantages of a simple process and low equipment investment.
Description
Technical Field
The invention belongs to the technical field of lead-zinc oxide ore dressing, and particularly relates to a combined inhibitor for lead-zinc oxide ore in lead-zinc sulfide tailings and application thereof.
Background
The sulfuration-oxidation mixed lead-zinc ore is an important lead-zinc ore resource. The hydrophobicity of sulphide minerals is stronger than that of oxidic minerals, so sulphide mineral recovery is relatively simple, and therefore the key to the utilisation of such ore resources is the recovery of oxidic minerals.
When recycling mineral resources in the vulcanized-oxidized mixed lead-zinc ore, a process of firstly floating vulcanized minerals and then floating oxidized minerals is generally adopted. The recovery of lead-zinc oxide minerals generally adopts a vulcanization flotation process of lead and zinc, namely, lead oxide is recovered firstly by adopting a vulcanization-xanthate method, and then zinc oxide minerals are recovered from lead oxide tailings by adopting a vulcanization-fatty amine method. However, the method has obvious disadvantages that (1) the oxidized minerals are hard to sulfide under normal temperature, and (2) the application of the aliphatic amine has high requirements on the pulp environment. (3) The oxidized minerals are brittle and have fine embedded granularity, and the fine oxidized minerals are easy to lose in tailings by adopting a conventional flotation process. In conclusion, the conventional inhibitor and the flotation process have the problems of high recovery cost, poor recovery effect and relatively complex process.
Therefore, it is necessary to provide a combined inhibitor with high separation efficiency of lead zinc oxide ore in lead zinc sulfur sulfide tailings and application thereof, and the combined inhibitor simplifies the process flow, reduces the recovery cost, and improves the floatation level and the comprehensive utilization rate of resources of complex and difficult-to-separate lead zinc ore in China.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides the combined inhibitor for the lead zinc oxide ores in the lead zinc sulfide tailings and the application thereof, and the combined inhibitor with high separation efficiency and the reverse flotation process are used, so that the process flow is simplified, the recovery cost is reduced, the synchronous inhibition and recovery of low-grade refractory lead zinc oxide ores are realized, and the flotation level and the comprehensive utilization rate of resources of complex refractory lead zinc ores are improved.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
The combined inhibitor comprises sodium fluosilicate, sodium sulfide and sodium humate, wherein the mass ratio of the sodium fluosilicate to the sodium sulfide to the sodium humate is 2:5:1.
The combined inhibitor is applied to a lead zinc oxide ore reverse flotation recovery process in lead zinc sulfide tailings.
Preferably, the lead oxide ore is anglesite, and the zinc oxide ore is zinc ferrite spinel or zincite.
Preferably, gangue minerals contained in the lead-zinc-sulfur sulfide tailings are mainly calcite and dolomite.
Preferably, the reverse flotation recovery process specifically comprises the following steps:
S1, grinding lead-zinc-sulfur sulfide tailings to obtain ore pulp with grinding fineness of-200 meshes accounting for 90%;
S2, sequentially adding sodium fluosilicate, sodium sulfide and sodium humate into the ore pulp obtained in the step S1 to serve as a combined inhibitor, adding a collector, performing reverse flotation operation, and performing primary roughing to obtain roughing concentrate and roughing tailings, wherein the roughing concentrate is mainly lead zinc oxide minerals, and the roughing tailings are mainly gangue minerals;
And S3, adding a collector into the roughing concentrate obtained in the step S2, and then performing twice scavenging operation, wherein the second scavenging operation is blank scavenging, and combining the roughing tailings obtained in the step S2 with the flotation foam obtained in the scavenging operation to perform tailing throwing.
Preferably, the collecting agent comprises oleic acid and oxidized paraffin soap, and the mass ratio of the oleic acid to the oxidized paraffin soap is 3:1.
Preferably, in S2, 6000g/t of combined inhibitor is added per ton of raw ore, wherein 1500g/t of ammonium fluosilicate, 3750g/t of sodium sulfide and 750g/t of sodium humate are added.
Preferably, in S2, 300g/t of collector is charged per ton of raw ore.
Preferably, in S3, 100g/t of collector is charged per ton of raw ore.
The combined inhibitor ammonium fluosilicate, sodium sulfide and sodium humate can realize the flotation separation of lead zinc oxide ore from lead zinc sulfide tailings, and mainly depend on the synergy and strengthening effect among 3 medicaments. The ammonium fluosilicate mainly plays roles in erosion and cleaning of minerals, and the pretreatment of fluosilicic acid can improve the relative content of lead and zinc atoms on the surface of lead-zinc oxide ores, especially zinc oxide ores such as siliceous heteropolar ores. In addition, because the lead-zinc-sulfur sulfide tailings generally contain a large amount of gangue minerals such as calcite, dolomite and the like, ammonium fluosilicate has certain acidity and has a cleaning effect on calcium and magnesium ions deposited on the surface of the lead-zinc oxide ores, so that fresh surfaces are exposed. The sodium sulfide mainly plays a role in vulcanizing target minerals, and the sodium sulfide and lead and zinc atoms on the surface of the lead zinc oxide ore undergo oxidation-reduction reaction, so that a lead sulfide and zinc sulfide film similar to the lead zinc sulfide ore is formed. The pretreatment of ammonium fluorosilicate further promotes the action of sodium sulfide. The addition of sodium humate reacts with lead sulfide and zinc sulfide films generated after the action of sodium sulfide, and physical and chemical adsorption further forms a covering layer of macromolecular organic matters on the surfaces of the lead sulfide and zinc sulfide films, so that the floatability difference of gangue minerals such as lead zinc oxide ore and calcite under a fatty acid system is increased.
The traditional lead-zinc sulfide tailings are subjected to flotation of lead-zinc oxide minerals, a lead-zinc sulfide tailings vulcanization-positive flotation process is used, namely, the lead oxide minerals are firstly floated by a vulcanization-xanthate method, then zinc oxide minerals are recovered from the lead oxide tailings by a vulcanization-fatty amine method, corresponding inhibitors are added in the separation process to inhibit the gangue minerals from floating upwards, and the positive flotation process can generate more negative influences such as flotation foam and the like due to factors such as collector types and has a larger influence on the flotation recovery effect. The reverse flotation process of the invention is to inhibit the upward floating of lead zinc oxide minerals by combining inhibitors, and to float gangue minerals by collectors, contrary to the traditional forward flotation process and the substances inhibiting the upward floating, and is therefore called a reverse flotation process. The invention improves the separation effect, in particular to the flotation effect of low-grade lead-zinc oxide minerals by applying the combined inhibitor in the reverse flotation process.
The invention has the beneficial effects that:
1. Compared with the traditional lead-zinc oxide mineral flotation process, the reverse flotation process adopted by the method has the advantages of simple flow, less equipment investment and the like. The traditional lead-zinc oxide mineral flotation process generally adopts a vulcanization-xanthate method to recover lead oxide by preferential flotation, and then adopts a vulcanization-fatty amine method to further recover zinc oxide. The reverse flotation process can realize synchronous recovery of lead oxide and zinc oxide.
2. The invention adopts the combined inhibitor with high separation efficiency and strong adaptability to ore property fluctuation, and ensures the flotation recovery effect of the lead-zinc oxide minerals.
3. The combined inhibitor and the reverse flotation process adopted by the invention realize synchronous recovery of lead oxide and zinc oxide, and have great theoretical value and economic value for improving the flotation level and the comprehensive utilization rate of resources of complex lead-zinc ores in China.
Drawings
FIG. 1 is a process flow diagram of the present invention
FIG. 2 is a flow chart of a conventional lead zinc oxide ore flotation process
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to facilitate understanding of the skilled person.
The raw ore is lead-zinc-sulfur sulfide tailings of a certain unit in Yunnan, the raw ore contains 0.64 percent of Pb and 1.52 percent of Zn, lead oxide minerals mainly comprise white lead ore and anglesite, zinc oxide minerals mainly comprise zinc ferrite spinel ore, and gangue minerals have higher content and mainly comprise calcite, dolomite and the like.
Example 1
The invention adopts reverse flotation technology and ammonium fluosilicate, sodium sulfide and sodium humate as combined inhibitor of lead-zinc oxide minerals, wherein the mass ratio of the ammonium fluosilicate to the sodium sulfide to the sodium humate is 2:5:1.
Grinding lead-zinc-sulfur sulfide tailings to obtain ore pulp with the grinding fineness of-200 meshes accounting for 90%, sequentially adding ammonium fluosilicate, sodium sulfide and sodium humate into the ore pulp, wherein the adding amount is 6000g/t according to the mass ratio of each ton of raw ore, the ammonium fluosilicate is 1500g/t, the sodium sulfide is 3750g/t, the sodium humate is 750g/t, then adding a collector, the adding amount of the collector is 300g/t according to the mass ratio of 3:1, the adding amount of oleic acid is 225g/t, the adding amount of oxidized paraffin soap is 75g/t, performing reverse flotation operation, obtaining gangue mineral roughing tailings and lead oxide zinc mineral roughing concentrate after primary roughing, then adding 100g/t of a collector into the obtained lead oxide zinc mineral roughing concentrate according to the mass ratio of each ton of raw ore, calculating according to the proportion, the adding amount of oleic acid is 75g/t, the adding amount of oxidized paraffin is 25g/t, performing secondary scavenging, performing a mixed flotation test to obtain the final result, and performing secondary scavenging test to obtain the final result, and performing rough flotation test to obtain the final product, wherein the final product is shown as the result after the secondary scavenging test.
According to the experimental results in table 1, the invention can effectively realize the comprehensive recovery of the lead-zinc oxide ore in the lead-zinc-sulfur sulfide tailings, the grade of lead in the lead-zinc oxide mixed concentrate is 3.61%, the grade of zinc is 12.04%, the enrichment ratio of lead is 5.64, and the enrichment ratio of zinc is 7.92, which shows that the combined inhibitor can effectively realize the separation of gangue minerals such as lead-zinc oxide minerals and calcite, and ensure the flotation effect of the lead-zinc oxide minerals.
Comparative example 1
In comparative example 1, a traditional forward flotation process and a traditional inhibitor are adopted to carry out a lead-zinc oxide mineral flotation experiment on a unit of lead-zinc-sulfur sulfide tailing crude ore in Yunnan area, wherein the crude ore contains 0.64% of Pb and 1.52% of Zn, the lead oxide mineral is mainly white lead ore and anglesite, the zinc oxide mineral is mainly zinc-iron spinel, the gangue mineral content is higher, and the lead oxide mineral is mainly calcite, dolomite and the like.
Grinding lead-zinc-sulfur sulfide tailings to obtain ore pulp with the grinding fineness of-200 meshes accounting for 90%, adding sodium sulfide to the ore pulp as an activator of lead oxide, wherein the total amount of the sodium sulfide is 1000g/t based on each ton of raw ore, adding a collecting agent butyl yellow, the adding amount of the lead oxide is 75g/t based on each ton of raw ore, the lead oxide scavenging amount is 25 g/t, the adding amount of foaming agent No. 2 oil is 25:3724/t, the lead oxide scavenging amount is 20: g/t based on each ton of raw ore, the lead oxide concentrate and the lead oxide tailings are obtained through one-time roughing and one-time scavenging operation, the adding of the sodium sulfide to the obtained lead oxide tailings as the activator of zinc oxide is used for selecting zinc oxide ores, the adding amount of the zinc oxide scavenging inhibitor is 5000: g/t based on each ton of raw ore, the adding amount of the lead oxide scavenging agent is 1200: g/t based on each ton of raw ore, the adding amount of the octadecylamine is 20: g/t based on each ton of raw ore, the total zinc oxide scavenging amount is g: g: g.
According to the experimental results in table 2, the comprehensive recovery effect of the conventional forward flotation process and the conventional inhibitor on the lead-zinc oxide minerals is poor. The grade of lead in the lead oxide concentrate is 3.11 percent, which is 0.50 percent lower than the grade of lead in the invention, the grade of zinc in the zinc oxide concentrate is 6.74 percent, which is 5.30 percent lower than the grade of zinc in the invention, the recovery rate of lead and zinc in the total tailings is 3.21 percent and 6.22 percent higher than the recovery rate of lead and zinc in the invention respectively, which indicates that the loss rate of lead-zinc oxide minerals is large. On the other hand, the sum of the yields of the lead-zinc oxide concentrates in the proportion 1 is 21.85 percent, which is 12.48 percent higher than that of the lead-zinc oxide concentrate in the invention, and the high yield indicates that the separation effect of the lead-zinc oxide minerals and gangue minerals is poor, and the cost of the subsequent transportation and smelting processes is increased. Finally, the traditional forward flotation process and the traditional inhibitor are adopted, the roughing and scavenging times are more, and the process flow is more complicated.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (9)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0453677A1 (en) * | 1990-04-19 | 1991-10-30 | The Dow Chemical Company | Depression of the flotation of silica or siliceous gangue in mineral flotation |
| CN108187916A (en) * | 2018-01-17 | 2018-06-22 | 驰宏科技工程股份有限公司 | A kind of dressing method of high oxidation rate lead-zinc |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104148187A (en) * | 2014-07-29 | 2014-11-19 | 广西金山铟锗冶金化工有限公司 | Ore selection method for treating tin, lead and zinc polymetallic oxidized ore |
| CN105689150B (en) * | 2016-04-15 | 2018-07-06 | 中南大学 | A kind of lead-zinc oxide ore flotation inhibitor and its application |
| PE20210008A1 (en) * | 2018-01-16 | 2021-01-05 | Clariant Int Ltd | ESTERQUATS FOR FLOTATION OF Ores and NON-SULPHID MINERALS, AND METHOD |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0453677A1 (en) * | 1990-04-19 | 1991-10-30 | The Dow Chemical Company | Depression of the flotation of silica or siliceous gangue in mineral flotation |
| CN108187916A (en) * | 2018-01-17 | 2018-06-22 | 驰宏科技工程股份有限公司 | A kind of dressing method of high oxidation rate lead-zinc |
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