Method for recovering valuable elements in electrolytic manganese leaching residue

Abstract

The present invention relates to a method for recovering valuable elements in electrolytic manganese leaching residue, the method comprising: feeding electrolytic manganese leaching residue containing valuable elements into a pulp stirring tank (1) for slurry mixing and stirring to obtain electrolytic manganese leaching residue slurry; allowing the electrolytic manganese leaching residue slurry to enter a flotation unit (2) for flotation treatment to obtain sulfur concentrate slurry and scavenging tailings slurry; the flotation treatment comprises a coarse-scavenging-fine flotation process, the slurry obtained by one concentration is the sulfur concentrate slurry, and the slurry obtained by one scavenging is the scavenging tailings slurry; the valuable elements include gold and / or silver. The method of the present invention can effectively separate and recover valuable elements such as gold, silver, sulfur, lead and zinc in electrolytic manganese leaching residue, and the method of the present invention is simple to operate, has a low recovery cost, a high recovery rate, and the grade of each valuable element concentrate recovered is high.

Description

Technical Field

[0001] The present disclosure relates to the technical field of valuable element recovery, and in particular, to a method for recovering valuable elements in electrolytic manganese leaching residue. Background Art

[0002] The main components that can be recovered from the polymetallic primary manganese carbonate ore are manganese, gold, silver, lead and zinc, which can all be used as objects for comprehensive utilization. The leaching residue produced by the electrolytic process to prepare metallic manganese contains a variety of valuable elements such as gold and silver. These valuable elements have great utilization value. If they can be comprehensively recovered, it will bring good economic benefits, not only reduce resource waste, but also avoid the damage to the ecological environment caused by the discarding of these materials, causing heavy metal pollution.

[0003] In the related art, this part of leaching residue is usually treated by cyanide leaching. The cyanide process requires the use of sodium cyanide, which is highly toxic and has high recovery costs. Cyanide leaching also involves electrolysis operations, which are high-temperature operations and have relatively complicated procedures. The recovery rate of valuable elements such as copper, lead, zinc and sulfur is low, and the grade of the recovered concentrate is also low. Summary of the invention

[0004] The purpose of the present invention is to provide a method for recovering valuable elements in electrolytic manganese leaching slag, so as to effectively recover valuable elements such as gold and silver in the electrolytic manganese leaching slag while reducing the recovery cost and simplifying the operation.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a method for recovering valuable elements in electrolytic manganese leaching residue, which comprises: feeding the electrolytic manganese leaching residue containing valuable elements into a slurry stirring tank for slurry mixing and stirring to obtain electrolytic manganese leaching residue slurry; allowing the electrolytic manganese leaching residue slurry to enter a flotation unit for flotation treatment to obtain sulfur concentrate slurry and scavenging tailings slurry; the flotation treatment comprises a coarse-scavenging-fine flotation process, the slurry obtained by one concentration is the sulfur concentrate slurry, and the slurry obtained by one scavenging is the scavenging tailings slurry; the valuable elements comprise gold and / or silver.

[0006] Optionally, the grinding fineness of the electrolytic manganese leaching slag is that the proportion of the part with a particle size of less than 150 μm is 95.5-96.98 weight %; the gold content in the electrolytic manganese leaching slag is 2.5-3 g / t, and the silver content is 300-350 g / t; in terms of mass percentage, the manganese content is 6.25-8.12 weight %.

[0007] Optionally, the pH value of the electrolytic manganese leaching residue slurry is 2-5; the solid content of the electrolytic manganese leaching residue slurry is 28-35% by weight.

[0008] Optionally, the one-roughing-one-scavenging-one-fining flotation process sequentially includes a roughing treatment, a scavenging treatment and a finishing treatment; the roughing treatment is carried out in a roughing device, the scavenging treatment is carried out in a scavenging device, and the finishing treatment is carried out in a finishing device; the roughing device includes 3 to 4 roughing flotation machines, the scavenging device includes 3 to 4 scavenging flotation machines, and the finishing device includes 2 to 3 finishing flotation machines.

[0009] Optionally, the method further includes allowing the electrolytic manganese leaching slag slurry to enter the roughing device for the primary roughing treatment to obtain a roughing concentrate slurry and a roughing tailings slurry; sending the roughing tailings slurry to the scavenging device for the primary scavenging treatment to obtain a scavenging concentrate slurry and the scavenging tailings slurry; sending the roughing concentrate and the scavenging concentrate to the concentrating device for the primary concentrating treatment to obtain the sulfur concentrate slurry.

[0010] Optionally, the roughing reagents used in the primary roughing treatment include collectors and frothers; the scavenging reagents used in the primary scavenging treatment include collectors and frothers; the collectors include xanthate and / or butyl ammonium black medicine; the frother is flotation 2# oil.

[0011] Optionally, the collector is a combination of the xanthate and the butylammonium black medicine, and the weight ratio of the xanthate to the butylammonium black medicine is (1-3):1.

[0012] Optionally, the conditions of the primary roughing treatment include: a time of 3 to 8 minutes, and an amount of the roughing agent added of 60 to 120 g / t relative to 1 g / t of the solid weight in the electrolytic manganese leaching slurry; the conditions of the primary scavenging treatment include: a time of 1 to 6 minutes, and an amount of the scavenging agent added of 30 to 70 g / t relative to 1 g / t of the solid weight in the electrolytic manganese leaching slurry; the time of the primary concentrating treatment is 2 to 7 minutes.

[0013] Optionally, the method further comprises feeding the sulfur concentrate slurry into a concentrate stirring tank for stirring, and pumping the obtained slurry into a chamber filter press through a feed pump for filtration to obtain the sulfur concentrate.

[0014] Optionally, the gold content in the sulfur concentrate is 12-15 g / t, the silver content is 1200-1400 g / t; and the manganese content is 6.25-8.12 weight % by mass.

[0015] Through the above technical scheme, the present invention can effectively separate and recover valuable elements such as gold, silver, lead and zinc in the electrolytic manganese leaching slag by slurrying the electrolytic manganese leaching slag and then subjecting the obtained electrolytic manganese leaching slag slurry to a coarse-sweep-fine flotation process to obtain a sulfur concentrate slurry. The method of the present invention is simple to operate, has a low recovery cost, a high recovery rate, and the grade of the recovered valuable element concentrates is high.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0018] Figure 1 The present invention discloses a process flow chart of a method for recovering valuable elements in electrolytic manganese leaching residue.

[0019] Description of Reference Numerals

[0020] 1 Slurry stirring tank 2 Flotation unit

[0021] 201 Roughing flotation machine 202 Sweeping flotation machine

[0022] 203 Concentrated flotation machine 3 Concentrate stirring tank

[0023] 4 Chamber filter press 5 Feed pump

[0024] 6 Filtrate pump 7 Conveyor

[0025] 8 Grab bucket DETAILED DESCRIPTION

[0026] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0027] The present disclosure provides a method for recovering valuable elements in electrolytic manganese leaching residue, the method comprising: feeding the electrolytic manganese leaching residue containing valuable elements into a slurry stirring tank 1 for slurry mixing and stirring to obtain electrolytic manganese leaching residue slurry; allowing the electrolytic manganese leaching residue slurry to enter a flotation unit 2 for flotation treatment to obtain sulfur concentrate slurry and scavenging tailings slurry; the flotation treatment comprises a coarse-scavenging-fine flotation process, the ore pulp obtained by one concentration is the sulfur concentrate slurry, and the ore pulp obtained by one scavenging is the scavenging tailings slurry; the valuable elements include gold and / or silver.

[0028] Through the above technical solution, reference Figure 1In the present invention, the leaching residue produced by electrolytic manganese is first placed in a slurry stirring tank 1 for slurry adjustment, and the electrolytic manganese leaching residue slurry obtained after the slurry adjustment is entered into a flotation unit 2, and a sulfur concentrate slurry is obtained through a roughing, sweeping and fine flotation process. The method of the present invention can effectively separate and recover valuable elements such as gold and silver in the electrolytic manganese leaching residue, and the method of the present invention is simple to operate, has a low recovery cost, a high recovery rate, and the grade of each valuable element concentrate recovered is high.

[0029] In one embodiment, the electrolytic manganese leaching slag is leaching slag produced by a process for preparing metallic manganese by electrolysis, wherein the gold content in the electrolytic manganese leaching slag is 2.5-3 g / t, and the silver content is 300-350 g / t; in terms of mass percentage, the manganese content is 6.25-8.12 weight %, the lead content is 0.5-1 weight %, the zinc content is 0.8-2 weight %, and the sulfur content is 6-9 weight %.

[0030] In one embodiment, the leaching residue produced by the electrolytic manganese preparation process can be sorted without grinding to obtain electrolytic manganese leaching residue with good sorting indicators; the grinding fineness of the electrolytic manganese leaching residue obtained after sorting is that the proportion of the part with a particle size of less than 150 μm accounts for 95.5-96.98% by weight.

[0031] In order to further enhance the separation capacity of the flotation treatment and thereby increase the recovery rate of valuable metals, especially the recovery rate of Ag, the electrolytic manganese leaching slag containing valuable metals can be subjected to grinding and separation treatment before slurry mixing and stirring, so that the grinding fineness of the electrolytic manganese leaching slag reaches 60 to 85 weight % of the particle size below 75 μm.

[0032] In this embodiment, after the leaching residue is subjected to grinding and separation treatment, the Ag recovery rate in the obtained sulfur concentrate increases with the increase of grinding fineness, but the increase is not large. Therefore, the leaching residue does not need to be ground again.

[0033] In one embodiment, during the slurry mixing process, it is necessary to add agents such as adjusters, inhibitors, sulfiding agents, dispersants, activators and collectors to the slurry mixing tank 1, and stir in stages to adjust the pH of the slurry or the inhibitory, activating and collecting effects of the agents in turn, so that the slurry meets the standards suitable for flotation requirements. Among them, the standards suitable for flotation requirements include a pH value of 2 to 5 for the electrolytic manganese leaching slurry, and a solid content of 28 to 35% by weight for the electrolytic manganese leaching slurry.

[0034] In this embodiment, the slurry stirring tank 1 used in the present invention is a conventional choice in the art. It should be noted that an online monitoring device is provided in the slurry stirring tank 1 for real-time monitoring of the pH value and concentration of the electrolytic manganese leaching slag slurry in the slurry stirring tank 1, thereby ensuring the stability of the slurry concentration entering the roughing operation and not causing fluctuations in the flotation operation.

[0035] In one embodiment, the one-roughing-one-scavenging-one-fining flotation process sequentially includes a roughing treatment, a scavenging treatment and a finishing treatment; the roughing treatment is carried out in a roughing device, the scavenging treatment is carried out in a scavenging device, and the finishing treatment is carried out in a finishing device; the roughing device includes 3 to 4 roughing flotation machines 201, the scavenging device includes 3 to 4 scavenging flotation machines 202, and the finishing device includes 2 to 3 finishing flotation machines 203.

[0036] In this embodiment, the roughing flotation machine 201, the scavenging flotation machine 202 and the cleaning flotation machine 203 are all conventionally selected in the art, and this application does not make any characteristic requirements. By setting the above-mentioned flotation unit 2 device, the effect of flotation treatment and separation can be increased, and the recovery rate of valuable metals can be further increased. In addition, one or more partition boxes are set at appropriate positions of the flotation unit 2 to control the liquid level and flow rate of the flotation machine.

[0037] In one embodiment of the present disclosure, a roughing-scavenging-concentrating flotation process includes: allowing the electrolytic manganese leaching slurry to enter the roughing device for the primary roughing treatment to obtain a roughing concentrate slurry and a roughing tailings slurry; sending the roughing tailings slurry to the scavenging device for the primary scavenging treatment to obtain a scavenging concentrate slurry and the scavenging tailings slurry; sending the roughing concentrate and the scavenging concentrate to the concentrating device for the primary concentrating treatment to obtain the sulfur concentrate slurry and the circulating slurry, and returning the circulating slurry to the roughing device.

[0038] According to the present disclosure, in order to further improve the recovery rate of valuable metals and the grade of valuable element concentrates in the flotation process, preferably, flotation reagents are added during a roughing treatment and a scavenging treatment, wherein the flotation reagents include collectors and frothers. In one embodiment of the present disclosure, the collector and frother are conventionally selected in the art, for example, the collector is selected from one or more of xanthate, butyl ammonium black medicine, butyl xanthate, isobutyl xanthate and methyl isoamyl xanthate, preferably xanthate and / or butyl ammonium black medicine; the frother is selected from one or more of flotation 2# oil, methyl isobutyl carbinol, BK-201 and pine oil, preferably flotation 2# oil.

[0039] In a preferred embodiment, the collector comprises a combination of xanthate and butylammonium black medicine, wherein the weight ratio of the xanthate to butylammonium black medicine is (1-3):1.

[0040] Specifically, in the above-mentioned collector and foaming agent involved in the present disclosure, the xanthate is Y89 xanthate, the Chinese name of Y89 xanthate is hexanthate, the English name is Y89, and the molecular formula is C7H 13 OS2Na; the Chinese name of butyl ammonium black medicine is dibutyl ammonium dithiophosphate, the English name is ammonium dibutyl dithiophosphate, and the molecular formula is (C4H9O)2PSSNH4; flotation 2# oil includes pine oil and chemical oil. Among them, chemical oil is made from the solvent produced as a by-product in the production of petroleum resin, which is obtained through deep processing and contains a small amount of olefin unsaturated substances.

[0041] In one embodiment, the time of each flotation treatment disclosed in the present invention can vary in a wide range. For example, the time of the primary roughing treatment can be 3 to 8 minutes, preferably 4 to 6 minutes; the time of the primary scavenging treatment is 1 to 6 minutes, preferably 2 to 4 minutes; the time of the primary cleaning treatment is 2 to 7 minutes, preferably 3 to 5 minutes.

[0042] In one embodiment, the amount of reagent added in each flotation treatment of the present disclosure can vary within a wide range. For example, relative to 1 g / t of the solid weight in the electrolytic manganese leaching residue slurry, the amount of the roughing reagent added is 60 to 120 g / t, preferably 80 to 95 g / t; relative to 1 g / t of the solid weight in the electrolytic manganese leaching residue slurry, the amount of the scavenging reagent added is 30 to 70 g / t, preferably 40 to 50 g / t.

[0043] In a preferred embodiment, relative to 1 g / t of the solid weight in the electrolytic manganese leaching residue slurry, the amount of the collector added in the flotation treatment is 60 to 100 g / t, preferably 85 to 95 g / t; the amount of the frother added is 30 to 60 g / t, preferably 40 to 50 g / t.

[0044] In one embodiment, the sulfur concentrate has a gold content of 12-15 g / t, a silver content of 1200-1400 g / t, a manganese content of 6.25-8.12 wt%, a lead content of 10-20 wt%, and a zinc content of 20-25 wt%.

[0045] In one embodiment, the method further includes feeding the sulfur concentrate slurry into a concentrate stirring tank 3 for stirring, and pumping the obtained slurry into a chamber filter press 4 through a feed pump 5 for filtration to obtain sulfur concentrate and filtrate.

[0046] In this embodiment, a filtrate pump 6 may be provided between the chamber filter press 4 and the slurry stirring tank 1, and the filtrate filtered out by the chamber filter press 4 is pumped into the slurry stirring tank 1 by the filtrate pump 6 for recycling, thereby avoiding waste of resources.

[0047] In one embodiment, the method further includes allowing the sulfur concentrate produced by filtration in the chamber filter press 4 to fall onto a conveyor 7, and then transporting it to a dedicated site for storage, and then grabbing the sulfur concentrate with a grab bucket 8 and moving it to a dedicated site for storage.

[0048] In one embodiment, if Figure 1 As shown, the method for recovering valuable elements in electrolytic manganese leaching residue includes:

[0049] The electrolytic manganese leaching residue containing valuable elements is sent to the slurry stirring tank 1 for slurry mixing and mixing with the slurry mixing water from the outlet pipeline of the filtrate pump 6 to obtain an electrolytic manganese leaching residue slurry with a pH of 2-5 and a solid content of 30% by weight. The electrolytic manganese leaching residue slurry, Y89, butyl ammonium black medicine and flotation 2# oil are sent to the roughing device and subjected to a roughing treatment to obtain a roughing concentrate slurry and a roughing tailing slurry; the roughing tailing slurry, Y89, butyl ammonium black medicine and flotation 2# oil are sent to the scavenging device for a scavenging treatment to obtain a scavenging concentrate slurry and a scavenging tailing slurry; the roughing concentrate and the scavenging concentrate are sent to the concentrating device for the said primary concentrating treatment to obtain a sulfur concentrate slurry, wherein the roughing device includes 3 roughing flotation machines 201, the scavenging device includes 3 scavenging flotation machines 202, and the concentrating device includes 3 concentrating flotation machines 203. The sulfur concentrate slurry is fed into the concentrate stirring tank 3 for stirring, and the obtained slurry is pumped into the chamber filter press 4 through the feed pump 5 for filtration to obtain sulfur concentrate and filtrate, and the sulfur concentrate is made to fall onto the conveyor 7 and then transported to a special site for storage, and then the sulfur concentrate can be grabbed by the grab bucket 8 and moved to a special site for storage; the filtrate is pumped into the slurry stirring tank 1 through the filtrate pump 6 for recycling.

[0050] The present disclosure is further illustrated by examples below, but the present disclosure is not limited thereto. The reagents, instruments and equipment involved in the following examples of the present disclosure can be purchased from the market unless otherwise specified, wherein the collector is a combination of Y89 and butyl ammonium black medicine, and the frother is flotation 2# oil. In the examples of the present disclosure, the gold content of the electrolytic manganese leaching residue involved is 2.97 g / t, the silver content is 316 g / t, the manganese content is 6.58% by mass, the lead content is 0.85%, the zinc content is 1.23%, and the sulfur content is 8.13%.

[0051] Example 1

[0052] The electrolytic manganese leaching slag containing valuable elements is fed into the slurry stirring tank 1 and slurried with 2.33 g / t slurry mixing water from the outlet pipeline of the filtrate pump 6 to obtain an electrolytic manganese leaching slag slurry with a pH of 5 and a solid content of 30 weight%, wherein the grinding fineness of the electrolytic manganese leaching slag is that the proportion of the part with a particle size of less than 75 μm is 64.63%.

[0053] 1g / t electrolytic manganese leaching residue slurry, 40g / t Y89, 20g / t butyl ammonium black powder and 28g / t flotation 2# oil are sent to the roughing device and subjected to a roughing treatment for 5 minutes to obtain a roughing concentrate slurry and a roughing tailings slurry; 0.8g / t roughing tailings slurry, 20g / t Y89, 10g / t butyl ammonium black powder and 14g / t flotation 2# oil are sent to the scavenging device for a scavenging treatment for 3 minutes to obtain a scavenging concentrate slurry and a scavenging tailings slurry; 0.3g / t roughing concentrate and 0.2g / t scavenging concentrate are sent to the concentrating device for the primary concentrating treatment for 4 minutes to obtain a sulfur concentrate slurry, wherein the roughing device includes 3 roughing flotation machines 201, the scavenging device includes 3 scavenging flotation machines 202, and the concentrating device includes 3 concentrating flotation machines 203.

[0054] The sulfur concentrate slurry is sent to the concentrate stirring tank 3 for stirring, and the obtained slurry is pumped into the chamber filter press 4 through the feed pump 5 for filtration to obtain sulfur concentrate and filtrate, and the sulfur concentrate falls onto the conveyor 7 and is then transported to a special site for storage, and then the sulfur concentrate can be grabbed by the grab 8 and moved to a special site for storage; the filtrate is pumped into the slurry stirring tank 1 through the filtrate pump 6 for recycling. The properties of the sulfur concentrate and the scavenging tailings are shown in Table 1.

[0055] Example 2

[0056] The method for recovering valuable elements in electrolytic manganese leaching residue is the same as that in Example 1, except that the feed amount of the primary roughing treatment is: 1 g / t electrolytic manganese leaching residue slurry, 35 g / t Y89, 25 g / t butyl ammonium black powder and 25 g / t flotation 2# oil; the feed amount of the primary scavenging treatment is: 1.04 g / t electrolytic manganese leaching residue slurry, 18 g / t Y89, 8 g / t butyl ammonium black powder and 12 g / t 2# flotation oil. The properties of the sulfur concentrate and scavenging tailings are shown in Table 1.

[0057] Example 3

[0058] The method for recovering valuable elements in electrolytic manganese leaching residue is the same as that in Example 1, except that the feed amount of the primary roughing treatment is: 1 g / t electrolytic manganese leaching residue slurry, 30 g / t Y89, 15 g / t butyl ammonium black powder and 20 g / t flotation 2# oil; the feed amount of the primary scavenging treatment is: 1.04 g / t electrolytic manganese leaching residue slurry, 12 g / t Y89, 6 g / t butyl ammonium black powder and 8 g / t 2# flotation oil. The properties of the sulfur concentrate and scavenging tailings are shown in Table 1.

[0059] Comparative Example 1

[0060] The method for recovering valuable elements in electrolytic manganese leaching residue is the same as that in Example 1, except that the flotation treatment is an open circuit treatment, specifically: the electrolytic manganese leaching residue slurry is fed into a roughing device for a roughing treatment to obtain a roughing concentrate slurry and a roughing tailing slurry; the roughing tailing slurry is fed into the scavenging device for a scavenging treatment to obtain a scavenging concentrate slurry and a scavenging tailing slurry; the roughing concentrate and the scavenging concentrate are fed into a concentrating device for a concentrating treatment to obtain a sulfur concentrate slurry and a concentrating middling ore. The properties of the sulfur concentrate, the scavenging tailings and the concentrating middling ore are shown in Table 1.

[0061] Table 1 Properties of the products in the embodiments and comparative examples

[0062]

[0063]

[0064] Among them, the gold grade and silver grade are obtained by analysis using a PerkinElmer AAnalyst400 atomic absorption spectrometer. The calculation method for the yield and recovery rate of each product in Table 1 is as follows:

[0065]

[0066]

[0067] As can be seen from the table, by comparing the data in Examples 1 to 3 with Comparative Example 1, it can be seen that the method disclosed in the present invention can effectively separate and recover gold and silver in electrolytic manganese leaching slag, the recovery rate is high, and the grade of each valuable element concentrate recovered is high, and the method disclosed in the present invention is simple to operate and has a low recovery cost. By comparing the data in Examples 1, 2 and 3, it can be seen that when the amount of roughing agent used in the flotation treatment is 85 to 95 g / t and the amount of scavenging agent used is 40 to 50 g / t, the recovery rate of gold and silver in electrolytic manganese leaching slag is high and the grade of the recovered gold and silver concentrate is high.

[0068] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0069] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0070] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for recovering valuable elements in electrolytic manganese leaching residue, characterized in that: The method includes: The electrolytic manganese leaching residue containing valuable elements is fed into a slurry stirring tank (1) for slurry mixing and stirring to obtain an electrolytic manganese leaching residue slurry; The electrolytic manganese leaching residue slurry enters a flotation unit (2) for flotation treatment to obtain a sulfur concentrate slurry and a scavenging tailings slurry; The flotation treatment includes a roughing-scavenging-fine flotation process, the pulp obtained from the first concentration is the sulfur concentrate pulp, and the pulp obtained from the first scavenging is the scavenging tailings pulp; The valuable elements include gold and / or silver; The one-roughing-sweeping-fining flotation process includes a roughing treatment, a sweeping treatment and a finishing treatment in sequence; The one-rougher-scavenger-fine flotation process comprises: allowing the electrolytic manganese leaching residue slurry to enter the rougher device for the first rougher treatment to obtain a rougher concentrate slurry and a rougher tailings slurry; sending the rougher tailings slurry to the scavenger device for the first scavenger treatment to obtain a scavenger concentrate slurry and a scavenger tailings slurry; sending the rougher concentrate and the scavenger concentrate to the finer device for the first finer treatment to obtain the sulfur concentrate slurry and the circulating slurry, and returning the circulating slurry to the rougher device; The roughing agents used in the primary roughing treatment include a collector and a foaming agent; The scavenging agents used in the one-time scavenging treatment include a collector and a foaming agent; The frother is flotation 2# oil; The collector is a combination of xanthate and butylammonium black medicine, and the weight ratio of the xanthate to the butylammonium black medicine is 2:1; The electrolytic manganese leaching residue is leaching residue produced by the electrolytic preparation of metallic manganese, wherein the gold content of the electrolytic manganese leaching residue is 2.5-3 g / t, and the silver content is 300-350 g / t; in terms of mass percentage, the manganese content is 6.25-8.12% by weight, the lead content is 0.5-1% by weight, the zinc content is 0.8-2% by weight, and the sulfur content is 6-9% by weight; The conditions of the primary roughing treatment include: the time is 5 minutes, and the amount of the roughing agent added is 65 g / t relative to the solid weight of 1 g / t in the electrolytic manganese leaching slurry; The conditions of the one-time scanning process include: the time is 3 minutes; The time of the first cleaning treatment is 4 minutes; Relative to 1 g / t of the solid weight in the electrolytic manganese leaching residue slurry, the amount of collector added in the flotation treatment is 62.3 g / t; The conditions of the primary scavenging treatment include: relative to 1 g / t of the solid weight in the electrolytic manganese leaching slurry, the added amount of the scavenging agent is 30-70 g / t.

2. The recycling method according to claim 1, characterized in that: The grinding fineness of the electrolytic manganese leaching slag is that the proportion of the part with a particle size below 150 μm is 95.5-96.98% by weight.

3. The recycling method according to claim 1, characterized in that: The pH value of the electrolytic manganese leaching residue slurry is 2-5; the solid content of the electrolytic manganese leaching residue slurry is 28-35% by weight.

4. The recycling method according to claim 1, characterized in that: The first roughing treatment is carried out in a roughing device, the first sweeping treatment is carried out in a sweeping device, and the first fine treatment is carried out in a fine device; The roughing device comprises 3 to 4 roughing flotation machines (201), the scavenging device comprises 3 to 4 scavenging flotation machines (202), and the cleaning device comprises 2 to 3 cleaning flotation machines (203).

5. The recycling method according to claim 1, characterized in that: The method further comprises feeding the sulfur concentrate slurry into a concentrate stirring tank (3) for stirring, and pumping the obtained slurry into a chamber filter press (4) through a feed pump (5) for filtering to obtain sulfur concentrate.

6. The recycling method according to claim 5, characterized in that: The sulfur concentrate has a gold content of 12-15 g / t and a silver content of 1200-1400 g / t; and a manganese content of 6.25-8.12% by weight.

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