Separation method of lead-zinc oxide ore

Abstract

The present invention provides a method for sorting lead-zinc oxide ores, comprising the following steps: grinding the lead-zinc oxide ores to be sorted to obtain a flotation pulp; sequentially performing sulfide ore flotation treatment, lead oxide flotation treatment and zinc oxide flotation treatment on the flotation pulp; mixing the first flotation ore, the second flotation ore and the third flotation ore, adding sodium sulfide and zinc oxide collectors to perform fine zinc oxide flotation, and recovering fine zinc oxide. The present invention can solve the problems that the desludging process of the currently used desludging-flotation process causes zinc oxide loss, affects the overall recovery rate, and the desludging effect fluctuates greatly, resulting in unstable production.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and more specifically, to a method for separating lead-zinc oxide ore. Background Art

[0002] The mineral composition of muddy oxidized lead-zinc ore is complex, with high content of fine mud and soluble salts, and the ore is extremely difficult to be separated, resulting in unsatisfactory conventional flotation process indicators of oxidized lead-zinc ore. At present, the most commonly used mineral processing technology for treating muddy oxidized lead-zinc ore is the desludging-flotation process. However, the desludging process of this process will lead to zinc oxide loss, and the separation indicators fluctuate greatly with the desludging effect, and stable production is generally not possible on site. In order to obtain better separation effects, mineral processing workers have tried a variety of mineral processing methods in recent years, such as flocculation flotation, carrier flotation, flotation using chelating collectors, sulfidation roasting-flotation, and multi-method combination processes. However, these processes have not yet made breakthrough progress, and the flotation of complex oxidized lead-zinc ores has always been a difficult problem in the mineral processing industry.

[0003] For example, the patent number CN100391616C discloses a method for beneficiating zinc oxide ore. The process first performs fine-grained flotation on the lead flotation tailings and then performs coarse-grained flotation. The patent solves the problem that it is difficult to flot muddy zinc oxide in the prior art, targeting the floating characteristics of muddy zinc oxide, which first floats small particles and then floats large particles. Useful zinc minerals can be floated out of muddy zinc oxide ore, and the recovery rate of zinc oxide is also improved, and the zinc oxide content of the tailings is reduced. However, the process requires the use of a large amount of fine-grained gangue mineral inhibitors, the reagent system is relatively complicated, and the process also requires desludging, resulting in partial zinc mineral loss.

[0004] For another example, the patent number: CN103182344 B discloses a combined beneficiation process for treating high-mud lead-zinc oxygen-sulfur mixed ores. The process performs screening and desliming before grinding, and the coarse particles in the grinding product are re-selected. The re-selection tailings and the sedimentation sand from the cyclone desliming are combined and then ground, and then flotation is performed. The removed ore mud is also floated. The process uses a combination of gravity selection and flotation to grade the oxidized lead-zinc ore. However, the process also has a desliming link, which is a desliming flotation. Although there is a sludge flotation link, the recovery rate of fine-grained ore mud flotation is relatively low, which affects the overall recovery rate.

[0005] In summary, at present, the most commonly used mineral processing technology for treating muddy oxidized lead-zinc ore is the desludging-flotation process. However, the desludging process of this process will lead to zinc oxide loss, and the separation index fluctuates greatly with the desludging effect, resulting in the problem that the production on site cannot be stabilized. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a method for separating lead-zinc oxide ore to solve the problems that the desludging process of the currently used desludging-flotation process causes zinc oxide loss, affects the overall recovery rate; and the desludging effect fluctuates greatly, resulting in unstable production.

[0007] The present invention provides a method for separating lead-zinc oxide ore, comprising the following steps:

[0008] Grinding the lead-zinc oxide ore to be separated to obtain flotation slurry;

[0009] The slurry entering the flotation ore is subjected to sulfide ore flotation treatment; the slurry entering the flotation ore flotation treatment comprises: performing sulfide ore roughing on the slurry entering the flotation ore to obtain a coarse lead-zinc sulfide ore and a first slurry, performing sulfide ore concentration on the coarse lead-zinc sulfide ore to obtain a lead-zinc sulfide concentrate and a first intermediate ore; performing a first fine scavenging on the first intermediate ore, returning the upper first intermediate ore obtained by the first fine scavenging to the sulfide ore roughing, and using the lower first intermediate ore obtained by the first fine scavenging as the first intermediate ore to be floated;

[0010] The first pulp is subjected to lead oxide flotation treatment; the lead oxide flotation treatment comprises: performing lead oxide roughing on the first pulp to obtain lead oxide rough ore and second pulp; performing lead oxide concentrating on the rough lead oxide ore to obtain lead oxide concentrate and second intermediate ore; performing second fine scavenging on the second intermediate ore, returning the upper second intermediate ore obtained by the second fine scavenging to the lead oxide roughing, and using the lower second intermediate ore obtained by the second fine scavenging as the second intermediate ore to be floated;

[0011] The second slurry is subjected to zinc oxide flotation treatment; the zinc oxide flotation treatment comprises: performing zinc oxide roughing on the second slurry to obtain zinc oxide rough ore and tailings; performing zinc oxide concentrating on the zinc oxide rough ore to obtain zinc oxide concentrate and a third intermediate ore; performing a third fine scavenging on the third intermediate ore, returning the third intermediate ore obtained in the third fine scavenging to the zinc oxide roughing, and using the third intermediate ore obtained in the third fine scavenging as the third intermediate ore to be floated;

[0012] After the first, second and third ore to be floated are mixed, sodium sulfide and zinc oxide collector are added to carry out fine zinc oxide flotation to recover fine zinc oxide; wherein, during the flotation of the fine zinc oxide, the flotation concentration is lower than 15%.

[0013] In addition, a preferred solution is that the mass concentration of the floating slurry is 20% to 25%.

[0014] In addition, a preferred solution is that the concentration of the sulfide ore roughing is 20% to 25%; and / or,

[0015] The concentration of the lead oxide roughing is 20% to 25%; and / or,

[0016] The concentration of the zinc oxide roughing is 15% to 20%.

[0017] In addition, a preferred solution is that in the process of subjecting the slurry to sulfide ore flotation,

[0018] The sulfide ore flotation is carried out on the flotation slurry by adopting two-stage sulfide ore roughing, two-stage sulfide ore concentrating and one-stage first fine scavenging method; wherein,

[0019] A sulfide ore collector and a first frother are added during the first stage of sulfide ore roughing; copper sulfate is first added to activate zinc sulfide during the second stage of sulfide ore roughing, and then the sulfide ore collector and the frother are added; the sulfide ore collector is added during the first fine scavenging; and / or, in the process of sulfide ore flotation treatment of the flotation slurry, the sulfide ore collector and the first frother are both saturated.

[0020] In addition, a preferred solution is that the sulfide ore collector is one of butyl xanthate, pentyl xanthate, isobutyl xanthate, isopentyl xanthate, No. 25 black medicine, butyl ammonium black medicine, and isobutyl sodium black medicine, or at least two of them mixed in any proportion; and / or the first foaming agent is one of No. 2 oil, MIBC, alcohol substances, and ether alcohol substances, or at least two of them mixed in any proportion.

[0021] In addition, a preferred solution is that during the lead oxide flotation treatment of the first slurry,

[0022] The first pulp is subjected to lead oxide flotation by adopting a method of two-stage lead oxide roughing, two-stage lead oxide cleaning and one-stage second fine scavenging; wherein,

[0023] In both the rough lead oxide selection stages, sodium sulfide is first added to activate the lead oxide, and then a lead oxide collector and a second frother are added; in the second fine scavenging selection stage, the lead oxide collector is added; and / or,

[0024] During the lead oxide flotation treatment of the first slurry, the lead oxide collector and the second frother are both saturated.

[0025] In addition, a preferred embodiment is that the lead oxide collector is one of butyl xanthate, pentyl xanthate, isobutyl xanthate, isopentyl xanthate, No. 25 black medicine, butyl ammonium black medicine, and isobutyl sodium black medicine, or at least two of them mixed in any proportion; and / or the second foaming agent is one of No. 2 oil, MIBC, alcohol substances, and ether alcohol substances, or at least two of them mixed in any proportion.

[0026] In addition, a preferred solution is that, during the zinc oxide flotation treatment of the second slurry,

[0027] The second pulp is subjected to zinc oxide flotation by adopting two stages of zinc oxide roughing, two stages of zinc oxide concentrating and one stage of third fine scavenging; wherein,

[0028] In the two-stage zinc oxide roughing, sodium sulfide is first added to activate the zinc oxide, and then the zinc oxide collector and the third foaming agent are added; in the third fine scavenging, sodium sulfide and the zinc oxide collector are added; and / or,

[0029] In the process of subjecting the second pulp to zinc oxide flotation treatment, the zinc oxide collector and the third frother are both saturated.

[0030] In addition, a preferred solution is that the zinc oxide collector is a fatty amine or ether amine collector or a mixed collector of the two in any proportion; and / or the third foaming agent is one of No. 2 oil, MIBC, alcohol substances, ether alcohol substances, or at least two of them mixed in any proportion.

[0031] In addition, a preferred solution is that the final fineness of the lead-zinc oxide ore after grinding is -0.074 mm, with a particle size accounting for 75% to 90%.

[0032] As can be seen from the above technical scheme, the lead-zinc oxide ore separation method provided by the present invention sequentially performs sulfide ore flotation, lead oxide flotation and zinc oxide flotation on the flotation slurry, and concentrates the first intermediate ore, the second intermediate ore and the third intermediate ore produced in the above flotation process before flotation of fine-grained zinc oxide. The whole process does not require the addition of any ore slime regulator or inhibitor, does not require desludging, does not require slime control, and selects all particle sizes, thereby avoiding the adverse effects of ore slime regulators or inhibitors on zinc oxide flotation and improving the flotation recovery rate of lead-zinc oxide ore; the intermediate ore containing fine slime is centrally processed. , the fine mud is timely led out of the main process to avoid the circulation and accumulation of fine mud in the main process; the saturated dosage in the flotation process of sulfide ore and lead oxide can float useful minerals and part of the fine mud as much as possible, while improving the mineral recovery rate, the fine mud floats with each operation, reducing the impact of fine mud on the subsequent zinc oxide flotation; the main process and the centralized treatment of middlings both adopt flotation of specific concentrations, which reduces the impact of fine mud on the flotation of zinc oxide minerals and improves the recovery rate of fine zinc oxide. In addition, flotation is used throughout the process without the need to introduce other processes.

[0033] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more clear and easy to understand. In the accompanying drawings:

[0035] Figure 1 A schematic diagram of a process for separating lead-zinc oxide ores according to an embodiment of the present invention;

[0036] Figure 2 The figure is a schematic diagram of a specific process of a method for separating lead-zinc oxide ore according to an embodiment of the present invention.

[0037] The same reference numerals in the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0038] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it is apparent that these embodiments may also be implemented without these specific details.

[0039] In view of the above-mentioned problems that the desludging process of the currently used desludging-flotation process causes zinc oxide loss, affecting the overall recovery rate; and the desludging effect fluctuates greatly, resulting in unstable production, a method and device for separating lead-zinc oxide ore are proposed.

[0040] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] In order to illustrate the lead-zinc oxide ore separation method provided by the present invention, Figure 1 The process of the lead-zinc oxide ore separation method according to an embodiment of the present invention is shown; Figure 2 The specific process of the lead-zinc oxide ore separation method according to an embodiment of the present invention is shown.

[0042] like Figure 1 Combination Figure 2 As shown in the figure, the method for separating lead-zinc oxide ore provided by the present invention comprises the following steps:

[0043] S1. Grind the oxidized lead-zinc ore to be separated to obtain a flotation slurry.

[0044] The lead-zinc oxide ore to be separated is placed in a grinding equipment for grinding to obtain a floating slurry.

[0045] As a preferred solution of the present invention, the mass concentration of the floating slurry is 20% to 25%.

[0046] As a preferred embodiment of the present invention, the final fineness of the lead-zinc oxide ore after grinding is -0.074 mm, accounting for 75% to 90%. The final fineness of the lead-zinc oxide ore after grinding is -0.074 mm, accounting for 75% to 90%, which means that the lead-zinc oxide ore after grinding has a particle size of less than 0.074 mm, accounting for 75% to 90% of the total ore particles.

[0047] S2, performing sulfide ore flotation treatment on the ore pulp entering the flotation process; the sulfide ore flotation process comprises: performing sulfide ore roughing on the ore pulp entering the flotation process to obtain coarse lead-zinc sulfide ore and a first ore pulp, performing sulfide ore concentration on the coarse lead-zinc sulfide ore to obtain a lead-zinc sulfide concentrate and a first intermediate ore; performing a first fine scavenging on the first intermediate ore, returning the upper first intermediate ore obtained by the first fine scavenging to the sulfide ore roughing process, and using the lower first intermediate ore obtained by the first fine scavenging as the first intermediate ore to be floated.

[0048] As a preferred solution of the present invention, the concentration of the sulfide ore roughing is 20% to 25%.

[0049] As a preferred embodiment of the present invention, during the flotation treatment of sulfide ore on the flotation slurry,

[0050] The sulfide ore flotation is carried out on the sulfide ore pulp by adopting two-stage sulfide ore roughing, two-stage sulfide ore concentrating and one-stage first fine scavenging method; wherein,

[0051] In the first stage of sulfide ore roughing, a sulfide ore collector and a first frother are added; in the second stage of sulfide ore roughing, copper sulfate is first added to activate zinc sulfide, and then a sulfide ore collector and a frother are added; in the first stage of sulfide ore fine scavenging, a sulfide ore collector is added; and / or,

[0052] In the process of sulfide ore flotation treatment of the flotation slurry, the sulfide ore collector and the first frother are both used in saturated dosage.

[0053] Saturated dosage means that the dosage of the reagent is increased by 10-20% under the optimal dosage. Saturated dosage can make useful minerals and part of the fine mud float as much as possible, while improving the mineral recovery rate, making the fine mud float with each operation, reducing the impact of fine mud on subsequent zinc oxide flotation.

[0054] As a preferred embodiment of the present invention, the sulfide ore collector is one of butyl xanthate, pentyl xanthate, isobutyl xanthate, isopentyl xanthate, No. 25 black medicine, butyl ammonium black medicine, isobutyl sodium black medicine, or at least two of them mixed in any proportion;

[0055] And / or, the first foaming agent is one of No. 2 oil, MIBC, alcohol substances, ether alcohol substances, or at least two of them mixed in any proportion.

[0056] S3, performing lead oxide flotation treatment on the first slurry; the lead oxide flotation treatment includes: performing lead oxide roughing on the first slurry to obtain a rough lead oxide ore and a second slurry; performing lead oxide concentration on the rough lead oxide ore to obtain a lead oxide concentrate and a second intermediate ore; performing a second fine scavenging on the second intermediate ore, returning the upper second intermediate ore obtained by the second fine scavenging to the lead oxide roughing, and using the lower second intermediate ore obtained by the second fine scavenging as the second intermediate ore to be floated.

[0057] As a preferred embodiment of the present invention, the concentration of lead oxide roughing is 20% to 25%.

[0058] As a preferred embodiment of the present invention, during the lead oxide flotation treatment of the first slurry,

[0059] The first pulp is subjected to lead oxide flotation by adopting a method of two-stage lead oxide roughing, two-stage lead oxide concentrating and one-stage second fine scavenging; wherein,

[0060] In both stages of lead oxide roughing, sodium sulfide is first added to activate the lead oxide, and then a lead oxide collector and a second frother are added; in the second stage of fine scavenging, a lead oxide collector is added; and / or,

[0061] In the process of lead oxide flotation treatment of the first pulp, the lead oxide collector and the second frother are both saturated. Saturated dosage means that the dosage of the reagent is increased by 10-20% under the optimal dosage of the reagent. Saturated dosage can float useful minerals and part of the fine mud as much as possible, while improving the mineral recovery rate, making the fine mud float with each operation, reducing the impact of the fine mud on the subsequent zinc oxide flotation.

[0062] As a preferred embodiment of the present invention, the lead oxide collector is one of butyl xanthate, pentyl xanthate, isobutyl xanthate, isoamyl xanthate, No. 25 black medicine, butyl ammonium black medicine, isobutyl sodium black medicine, or at least two of them mixed in any proportion;

[0063] And / or, the second foaming agent is one of No. 2 oil, MIBC, alcohol substances, ether alcohol substances, or at least two of them mixed in any proportion.

[0064] S4, performing zinc oxide flotation treatment on the second slurry; the zinc oxide flotation treatment includes: performing zinc oxide roughing on the second slurry to obtain zinc oxide coarse ore and tailings; performing zinc oxide concentrating on the zinc oxide coarse ore to obtain zinc oxide concentrate and a third intermediate ore; performing a third fine scavenging on the third intermediate ore, returning the upper third intermediate ore obtained by the third fine scavenging to the zinc oxide roughing, and using the lower third intermediate ore obtained by the third fine scavenging as the third intermediate ore to be floated.

[0065] As a preferred embodiment of the present invention, the concentration of zinc oxide roughing is 15% to 20%.

[0066] As a preferred embodiment of the present invention, during the zinc oxide flotation treatment of the second pulp,

[0067] The second pulp is subjected to zinc oxide flotation by means of two-stage zinc oxide roughing, two-stage zinc oxide concentrating and one-stage third fine scavenging; wherein,

[0068] In the two-stage zinc oxide roughing, sodium sulfide is first added to activate the zinc oxide, and then the zinc oxide collector and the third frother are added; in the third fine scavenging, sodium sulfide and zinc oxide collector are added; and / or,

[0069] In the process of zinc oxide flotation treatment of the second pulp, the zinc oxide collector and the third frother are both saturated. Saturated use can make useful minerals and part of fine mud float as much as possible, while improving the mineral recovery rate, making the fine mud float with each operation, reducing the impact of fine mud on subsequent zinc oxide flotation.

[0070] As a preferred embodiment of the present invention, the zinc oxide collector is a fatty amine or ether amine collector or a mixed collector of the two in any proportion; such as dodecylamine, octadecylamine; and / or,

[0071] The third foaming agent is one of No. 2 oil, MIBC, alcohol substances, ether alcohol substances, or at least two of them mixed in any proportion.

[0072] S5. After mixing the first, second and third ore to be floated, sodium sulfide and zinc oxide collector are added to carry out flotation of fine zinc oxide to recover fine zinc oxide; wherein, during the flotation of the fine zinc oxide, the flotation concentration is lower than 15%.

[0073] As a preferred embodiment of the present invention, during the flotation of fine zinc oxide, the flotation concentration is 10% to 15%.

[0074] After fine sweeping of sulfide ore, lead oxide and selected zinc oxide middlings, all tailings are processed centrally, sodium sulfide is added to activate zinc oxide, and zinc oxide collector is added to recover fine zinc oxide to reduce zinc oxide loss.

[0075] The flotation concentration of the main process and the flotation concentration of the concentrated treatment of the middlings are beneficial to the dispersion of the ore slime and the flotation of the oxide ore. Combined with the flotation process, the entire flotation process does not add any ore slime inhibitors or slurry adjusters, and the whole process is realized without desliming or slime control. The inhibition of zinc oxide minerals by ore slime inhibitors is avoided, and the adverse effects of fine mud on zinc oxide flotation are overcome, ensuring the recovery rate of zinc oxide.

[0076] The following examples will further illustrate the present invention so that those skilled in the art can better understand the advantages and features of the present invention.

[0077] Embodiment 1:

[0078] A certain oxidized lead-zinc ore contains 3.72% lead and 7.31% zinc, with oxidation rates of 72% and 75% respectively. The final fineness of the ore is -0.074mm, with a particle size of 85%, and the final mass concentration of the flotation slurry is 25%.

[0079] The flotation concentration of sulfide ore roughing is 25%, the collectors are butyl xanthate and butyl ammonium black powder, and the frother is No. 2 oil. The total amount of collector used in the roughing stage is increased by 20% to 150g / t 原矿 The total amount of foaming agent increased by 20% to 90g / t 原矿 The total amount of collector used for fine sweeping is 10g / t 原矿 ;

[0080] The concentration of lead oxide flotation in roughing is 25%, the concentration of lead oxide flotation in fine scavenging is 15%, the collectors are butyl xanthate and butyl ammonium black powder, and the frother is No. 2 oil. The total amount of sodium sulfide used in the roughing stage is 1000g / t 原矿 , the total amount of collector increased by 20% to 150g / t 原矿 The total amount of foaming agent increased by 20% to 90g / t 原矿 The total amount of collector used for fine sweeping is 10g / t 原矿 ;

[0081] The zinc oxide roughing flotation concentration is 20%, the fine scavenging concentration is 10%, and the collector is dodecylamine. The total amount of sodium sulfide used in the roughing stage is 4000g / t 原矿 , the total amount of collector is 120g / t 原矿 The total amount of collector used for fine sweeping is 15g / t 原矿 .

[0082] Centralized processing of middlings, flotation concentration of 10%, sodium sulfide dosage of 2000g / t 原矿 , the dosage of dodecylamine is 60g / t 原矿 .

[0083] By the above method, the lead grade of the total mixed concentrate is 10.47%, the lead recovery rate is 85.78%, the zinc grade is 20.89%, and the zinc recovery rate is 85.78%.

[0084] Embodiment 2:

[0085] A certain oxidized lead-zinc ore contains 2.63% lead and 5.58% zinc, and the oxidation rates of lead and zinc are 72% and 74% respectively. By the same method as in Example 1, the lead grade of the total mixed concentrate can be 8.57%, the lead recovery rate is 85.15%, the zinc grade is 18.85%, and the zinc recovery rate is 84.52%.

[0086] Embodiment 3:

[0087] A certain oxidized lead-zinc ore contains 4.24% lead and 9.41% zinc, and the oxidation rates of lead and zinc are 62% and 71% respectively. By the same method as in Example 1, the lead grade of the total mixed concentrate is 11.67%, the lead recovery rate is 86.89%, the zinc grade is 25.45%, and the zinc recovery rate is 85.78%.

[0088] Comparative Example 1:

[0089] Compared with Example 1, the flotation concentration of each operation in the main process is 35%, and the lead grade of the total mixed concentrate obtained is 10.01%, the lead recovery rate is 84.61%, the zinc grade is 20.14%, and the zinc recovery rate is 82.43%.

[0090] Comparative Example 2:

[0091] Compared with Example 1, all the middlings are returned to the roughing operation without fine sweeping, and slime adjusters such as sodium hexametaphosphate 100 g / t and water glass 2000 g / t are added during zinc flotation, so that the lead grade of the total mixed concentrate is 10.12%, the lead recovery rate is 84.53%, the zinc grade is 20.05%, and the zinc recovery rate is 81.81%.

[0092] It can be seen from the above specific embodiments that the lead-zinc oxide ore separation method provided by the present invention sequentially performs sulfide ore flotation, lead oxide flotation and zinc oxide flotation on the flotation slurry, and concentrates the first intermediate ore, the second intermediate ore and the third intermediate ore produced in the above flotation process before flotation of fine-grained zinc oxide. The entire process does not require the addition of any ore slime adjuster or inhibitor, does not require desludging, does not require slime control, and selects all particle sizes, thereby improving the flotation recovery rate of the lead-zinc oxide ore; the intermediate ore containing fine mud is centrally treated, and the fine mud is timely drawn out of the main process to avoid the circulation and accumulation of fine mud in the main process; both the main process and the centralized treatment of the intermediate ore adopt flotation of a specific concentration, which reduces the influence of fine mud on the flotation of zinc oxide ore, while improving the recovery rate of fine-grained zinc oxide, and the whole process adopts flotation without introducing other processes.

[0093] As described above, the lead-zinc oxide ore separation method proposed in the present invention is described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the lead-zinc oxide ore separation method proposed in the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A method for separating lead-zinc oxide ore, characterized in that: The steps include: Grinding the lead-zinc oxide ore to be separated to obtain flotation slurry; The slurry entering the flotation ore is subjected to sulfide ore flotation treatment; the slurry entering the flotation ore flotation treatment comprises: performing sulfide ore roughing on the slurry entering the flotation ore to obtain a coarse lead-zinc sulfide ore and a first slurry, performing sulfide ore concentration on the coarse lead-zinc sulfide ore to obtain a lead-zinc sulfide concentrate and a first intermediate ore; performing a first fine scavenging on the first intermediate ore, returning the upper first intermediate ore obtained by the first fine scavenging to the sulfide ore roughing, and using the lower first intermediate ore obtained by the first fine scavenging as the first intermediate ore to be floated; The first pulp is subjected to lead oxide flotation treatment; the lead oxide flotation treatment comprises: performing lead oxide roughing on the first pulp to obtain lead oxide rough ore and second pulp; performing lead oxide concentrating on the rough lead oxide ore to obtain lead oxide concentrate and second intermediate ore; performing second fine scavenging on the second intermediate ore, returning the upper second intermediate ore obtained by the second fine scavenging to the lead oxide roughing, and using the lower second intermediate ore obtained by the second fine scavenging as the second intermediate ore to be floated; The second slurry is subjected to zinc oxide flotation treatment; the zinc oxide flotation treatment comprises: performing zinc oxide roughing on the second slurry to obtain zinc oxide rough ore and tailings; performing zinc oxide concentrating on the zinc oxide rough ore to obtain zinc oxide concentrate and a third intermediate ore; performing a third fine scavenging on the third intermediate ore, returning the third intermediate ore obtained in the third fine scavenging to the zinc oxide roughing, and using the third intermediate ore obtained in the third fine scavenging as the third intermediate ore to be floated; After the first, second and third ore to be floated are mixed, sodium sulfide and zinc oxide collector are added to carry out fine zinc oxide flotation to recover fine zinc oxide; wherein, during the flotation of the fine zinc oxide, the flotation concentration is lower than 15%.

2. The method for separating lead-zinc oxide ore according to claim 1, characterized in that: The mass concentration of the flotation slurry is 20% to 25%; and / or, During the flotation of fine zinc oxide, the flotation concentration is 10% to 15%.

3. The method for separating lead-zinc oxide ore according to claim 1, characterized in that: The concentration of the sulfide ore roughing is 20% to 25%; and / or, The concentration of the lead oxide roughing is 20% to 25%; and / or, The concentration of the zinc oxide roughing is 15% to 20%.

4. The method for separating lead-zinc oxide ore according to claim 1, characterized in that: In the process of flotation treatment of sulfide ore on the flotation slurry, The sulfide ore flotation is carried out on the flotation slurry by adopting two-stage sulfide ore roughing, two-stage sulfide ore concentrating and one-stage first fine scavenging method; wherein, In the first stage of sulfide ore roughing, a sulfide ore collector and a first frother are added; in the second stage of sulfide ore roughing, copper sulfate is first added to activate zinc sulfide, and then the sulfide ore collector and the frother are added; in the first stage of sulfide ore fine scavenging, the sulfide ore collector is added; and / or, In the process of performing sulfide ore flotation treatment on the flotation slurry, the sulfide ore collector and the first frother are both saturated.

5. The method for separating lead-zinc oxide ore according to claim 4, characterized in that: The sulfide ore collector is one of butyl xanthate, pentyl xanthate, isobutyl xanthate, isopentyl xanthate, No. 25 black medicine, butyl ammonium black medicine, and isobutyl sodium black medicine, or at least two of them mixed in any proportion; And / or, the first foaming agent is one of No. 2 oil, MIBC, alcohol substances, ether alcohol substances, or at least two of them mixed in any proportion.

6. The method for separating lead-zinc oxide ore according to claim 1, characterized in that: During the lead oxide flotation treatment of the first pulp, The first pulp is subjected to lead oxide flotation by adopting a method of two-stage lead oxide roughing, two-stage lead oxide cleaning and one-stage second fine scavenging; wherein, In both the rough lead oxide selections, sodium sulfide is first added to activate the lead oxide, and then the lead oxide collector and the second frother are added; in the second fine scavenging, the lead oxide collector is added; and / or, During the lead oxide flotation treatment of the first slurry, the lead oxide collector and the second frother are both saturated.

7. The method for separating lead-zinc oxide ore according to claim 6, characterized in that: The lead oxide collector is one of butyl xanthate, pentyl xanthate, isobutyl xanthate, isopentyl xanthate, No. 25 black medicine, butyl ammonium black medicine, and isobutyl sodium black medicine, or at least two of them mixed in any proportion; And / or, the second foaming agent is one of No. 2 oil, MIBC, alcohol substances, ether alcohol substances, or at least two of them mixed in any proportion.

8. The method for separating lead-zinc oxide ore according to claim 1, characterized in that: In the process of subjecting the second pulp to zinc oxide flotation treatment, The second pulp is subjected to zinc oxide flotation by adopting two stages of zinc oxide roughing, two stages of zinc oxide concentrating and one stage of third fine scavenging; wherein, In the two-stage zinc oxide roughing, sodium sulfide is first added to activate the zinc oxide, and then the zinc oxide collector and the third foaming agent are added; in the third fine scavenging, sodium sulfide and the zinc oxide collector are added; and / or, In the process of subjecting the second pulp to zinc oxide flotation treatment, the zinc oxide collector and the third frother are both saturated.

9. The method for separating lead-zinc oxide ore according to claim 8, characterized in that: The zinc oxide collector is a fatty amine or ether amine collector or a mixed collector of the two in any proportion; and / or, The third foaming agent is one of No. 2 oil, MIBC, alcohol substances, ether alcohol substances, or at least two of them mixed in any proportion.

10. The method for separating lead-zinc oxide ore according to claim 1, characterized in that: The final fineness of the lead-zinc oxide ore after grinding is -0.074 mm, accounting for 75% to 90%.

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