Beneficiation method for recovering silver, copper, zinc and sulfur from complex table middlings

Abstract

The invention belongs to the technical field of beneficiation recovery, and particularly relates to a beneficiation method for recovering silver, copper, zinc and sulfur from middling of a complex table concentrator. The beneficiation method provided by the invention comprises the processes of ore grinding, flotation of silver, copper, sulfur and the like, separation of silver, copper and sulfur, mixed flotation of zinc and sulfur, separation of zinc and sulfur and the like. According to the beneficiation method, the special properties of the complex table middlings are combined, the floatability difference of sulfide minerals is utilized, the step-by-step flotation and enrichment technological process is adopted, efficient enrichment and separation of valuable minerals in the complex table middlings are achieved, and silver, copper, zinc, sulfur and the like in the ores are effectively recycled. And moreover, in the recovery process, the agent dosage is low, the separation effect is good, and a solid foundation is laid for large-scale recovery of silver, copper, zinc, sulfur and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of ore dressing and recovery, and in particular relates to an ore dressing method for recovering silver, copper, zinc and sulfur from ore in a complex shaking table. Background Art

[0002] Silver has been a precious metal since ancient times and has long been used as hard currency. With the rapid development of science and technology, silver has been more widely used due to its excellent stability, conductivity and other special properties. Since silver has a strong affinity for sulfur, it often coexists with sulfide minerals in nature to form complex polymetallic symbiotic ores such as silver, copper, zinc and sulfur. Silver, copper, zinc and sulfur minerals in silver-tin symbiotic ores have complex intergrowth relationships and extremely uneven intergrowth particle sizes. In the mineral processing process, stage grinding and stage separation processes are usually used, and valuable elements rich in silver, copper, zinc, sulfur and tin are often produced. However, there is currently no suitable mineral processing technology for the complex properties of shaking table ore products, resulting in a large number of valuable elements that have not been effectively recycled and utilized, and a large amount of precious silver, copper, zinc and sulfur resources have been lost.

[0003] Research reports have been published on the recovery technology of tin polymetallic ore beneficiation and the shaking table middlings produced therein: for example, due to the decline in the quality of the original ore in the Chehe beneficiation plant, the original middling system has problems such as low feed grade, high iron content, and poor re-selection enrichment effect, which affect the efficiency of the beneficiation plant. In order to solve the above problems, the existing technology optimizes the process flow by adding a spiral chute to separate the 6# mill discharge and the sawtooth wave jig two-chamber coarse concentrate in the mixed feed of the original middling system, installing a magnetic separator to pre-de-ironize the shaking table feed, and increasing the diameter of the grinding medium. The iron content of the shaking table feed of the middlings is reduced, and the flotation operation efficiency is improved. The results of production practice show that after the transformation, the tin metal recovery rate of the middling system has increased from 4.13% before the transformation to 5.10%, and the quality qualification rate of tin concentrate has increased from 78.63% to 85.47%. The beneficiation plant can increase the economic benefits by 6.56 million yuan per year. However, the feed ore of this beneficiation method is the middling ore of Chehe beneficiation plant, the main component of which is tin. Therefore, the composition is relatively simple, making the recovery process relatively simple.

[0004] Some existing technologies have been analyzed through mineralogy of a tungsten-containing crude tin material, and a test plan has been formulated to carry out desulfurization, deironization, and decontamination, and produce tungsten-tin mixed concentrates. The tungsten-tin mixed concentrates have also been subjected to flotation and hydrometallurgical tests, achieving effective separation of tungsten and tin, and producing qualified tungsten, tin concentrates, sulfur concentrates, and iron rough concentrates. In view of the tailings resources of the tailings pond of Yunnan Tin Company, the properties of the tailings samples were analyzed, combined with the tailings dressing test process research and production practice experience, and the old tin tailings of a tailings pond were pre-classified, sand and mud were sorted, and exploratory tests such as graded sand magnetic separation, rotary spiral chute pre-selection, and shaking table gravity selection were carried out. Finally, a Φ250mm cyclone was used for pre-classification, sand grinding twice, shaking table separation twice, graded overflow centrifuge pre-selection, and belt chute selection process was adopted. The test results show that the sample contains 0.18% tin, the sand settling produces a crude tin concentrate containing 8.60% tin, and the tin recovery rate is 41.12%; the mud ore produces a rich medium ore containing 5.56% tin, and the tin recovery rate is 5.22%. The feed materials of these two methods are not medium ore, and their main components are completely different.

[0005] Chinese patent application CN110404690A discloses a method for recovering independent silver minerals from silver-tin paragenetic ore. The research object is silver-tin paragenetic ore. First, the ore is ground to less than 15 mm by grinding, and then pre-screened by high-frequency vibrating screen to obtain raw ore below 0.2 mm and raw ore above 0.2 mm. The raw ore above 0.2 mm is returned to grinding, and the cycle is repeated to obtain raw ore below 0.2 mm. The raw ore below 0.2 mm is subjected to independent silver mineral enhanced flotation to obtain silver concentrate and floating silver tailings, and the floating silver tailings are fed to subsequent cassiterite separation. The feed of this method is silver-tin paragenetic ore, the main components of which are silver and tin. Therefore, in the recovery process, the main additives are for these two metals, and it is impossible to recover silver, copper, zinc and sulfur at the same time.

[0006] It can be seen from this that the development of an economical and reasonable mineral processing technology for recovering silver, copper, zinc and sulfur from complex shaking table ores has important application value. Summary of the invention

[0007] In view of the problem that the existing technology lacks reasonable recovery technology for silver, copper, zinc and sulfur resources in complex shaking table middlings, the present invention provides a beneficiation method for recovering silver, copper, zinc and sulfur from complex shaking table middlings. The present invention recovers silver, copper, zinc and sulfur concentrates, zinc concentrates, sulfur concentrates and floating sulfur tailings, etc., realizes the comprehensive recovery of silver, copper, zinc and sulfur resources in complex shaking table middlings, and creates favorable conditions for subsequent cassiterite separation, with the characteristics of short process, low reagent dosage and advanced technical and economic indicators.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A method for recovering silver, copper, zinc and sulfur from complex shaking table ore, comprising the following steps:

[0010] S1. Grinding the raw ore to obtain a grinding product;

[0011] S2. Silver-copper-sulfur flotation: adding an inhibitor to the grinding product obtained in step S1, adding a collector for roughing and scavenging, and then adding an inhibitor for concentrating to obtain a silver-copper-sulfur mixed concentrate and an equal-floating tailings;

[0012] S3. Grinding the silver-copper-sulfur mixed concentrate obtained in step S2 to obtain a ground silver-copper-zinc-sulfur mixed concentrate;

[0013] S4. silver-copper and sulfur flotation separation: adding an inhibitor to the silver-copper-zinc-sulfur mixed concentrate obtained after grinding in step S3, adding a collector for roughing and scavenging, and then adding an inhibitor for concentrating to obtain a silver-copper concentrate and a sulfur concentrate 1;

[0014] S5. Zinc-sulfur mixed flotation: adding an activator, a collector, and a frother to the equal-floating tailings obtained in step S2 for roughing, adding a collector for scavenging, and then concentrating to obtain a zinc-sulfur mixed concentrate and floating sulfur tailings;

[0015] S6. adding an inhibitor to the zinc-sulfur mixed concentrate obtained in step S5, and grinding the ore to obtain a ground zinc-sulfur mixed concentrate;

[0016] S7. Zinc-sulfur separation: adding an activator to the zinc-sulfur mixed concentrate obtained after grinding in step S6, then adding a collector for roughing and scavenging, and then adding an inhibitor for concentrating, to obtain zinc concentrate and sulfur concentrate 2.

[0017] The biggest characteristics of silver, copper, zinc and sulfur associated with complex shaking table ore are that there are many types of valuable minerals but low content, and the embedded particle size is fine. The subsequent cassiterite beneficiation restricts the particle size of sulfide ore selection. At the same time, the sulfide ore beneficiation reagents are required to interfere with cassiterite selection as little as possible. Therefore, the recovery of silver, copper, zinc and sulfur from complex shaking table ore requires the development of reasonable process and economically feasible technology, which places high demands on the beneficiation process.

[0018] For complex shaking table ores, the current mineral processing technology is usually: grinding sulfide ore mixed flotation, producing sulfide ore mixed concentrate, and the floating sulfur tailings are sent to cassiterite separation. The obtained sulfide ore mixed concentrate is affected by a large amount of sulfide ore reagents, resulting in poor separation effect, the obtained concentrate has low grade, or even cannot be separated, and the efficiency is poor.

[0019] In order to solve the above problems, the present invention provides a beneficiation method for recovering silver, copper, zinc and sulfur from complex shaking table ore. Combined with the special properties of silver, copper, zinc and sulfur in the complex shaking table ore and the need for cassiterite separation, stage grinding and stage separation are adopted, and silver, copper and sulfur can be floated to fully ensure that high-value silver and copper are fully recovered, and then the removal of zinc and sulfur minerals is strengthened to ensure that zinc and sulfur are removed, which is beneficial to zinc and sulfur separation. At the same time, the main process does not introduce lime, avoiding serious interference with subsequent cassiterite separation.

[0020] Preferably, in the product after grinding in step S1, the Ag grade is 9.8 g / t to 24.3 g / t, the Cu grade is 0.05% to 0.11%, the Zn grade is 0.38% to 0.55%, and the S grade is 1.41% to 2.43%.

[0021] In the process provided by the present invention, an inhibitor is added after grinding in S2 to suppress zinc-sulfur minerals, separate silver-copper-sulfur minerals from zinc-sulfur minerals, and obtain silver-copper-sulfur concentrate; an inhibitor is added in S4 to suppress sulfur minerals, and obtain silver-copper concentrate and sulfur concentrate 1; an activator and a collector are added to the silver-copper tailings in S5 to activate and collect the suppressed zinc-sulfur minerals, and obtain a zinc-sulfur mixed concentrate; an activator and a collector are added in S6 / S7 to separate zinc-sulfur, and obtain zinc concentrate and sulfur concentrate. Through step-by-step equal flotation and regrinding for efficient flotation separation, various valuable sulfide minerals in the complex shaking table middlings are recovered in an enhanced manner.

[0022] Preferably, the amount of inhibitor added to the product after grinding in step S2 is 2000g / t to 4000g / t, and the amount of inhibitor added after scavenging is 200g / t to 600g / t, and the inhibitor is selected from any two of sodium carbonate, zinc sulfate and sodium sulfite.

[0023] Preferably, the specific process of adding the collector for rough selection and scavenging in step S2 is as follows: add 80g / t~120g / t of collector, stir for 2min~3min, do rough selection, add 20g / t~30g / t of collector, do one scavenging, add 10g / t~15g / t of collector, do two scavenging; the collector is selected from one or two of butyl ammonium black medicine, Z200, ethyl xanthate, and ethyl dixanthate.

[0024] Preferably, the amount of inhibitor added to the silver-copper-sulfur mixed concentrate after grinding in step S4 is 300g / t to 600g / t, and the amount of inhibitor added after scavenging is 60g / t to 120g / t; the inhibitor is selected from one or two of lime, sodium humate and sodium sulfite.

[0025] Preferably, the specific process of adding a collector for roughing and scavenging in step S4 is as follows: 3 g / t to 6 g / t of collector, stirring for 2 min to 3 min, roughing, adding 0.5 g / t to 1 g / t of collector, scavenging once, adding 0.3 g / t to 0.5 g / t of collector, scavenging twice; the collector is selected from one or both of Y89 yellow medicine and Z200.

[0026] Preferably, the amount of the activator added in step S5 is 100g / t to 800g / t; when the collector is added and stirred, the amount of the collector added is 120g / t to 160g / t; the amount of the foaming agent added is 15g / t to 25g / t; the process of adding the collector for scavenging is as follows: adding 20g / t to 30g / t of the collector, doing a scavenging once, adding 10g / t to 20g / t of the collector, doing a second scavenging; the activator described in step S5 is selected from one or two of copper sulfate and oxalic acid, the collector is selected from one or two of butyl xanthate and ethyl xanthate, and the foaming agent is selected from one of pine oil and methyl isobutyl carbinol.

[0027] Preferably, the amount of the inhibitor added in step S6 is 400 g / t to 800 g / t, and the inhibitor is selected from one or both of lime and sodium humate.

[0028] Preferably, in step S7, the amount of the activator added is 10 g / t to 15 g / t, and the activator is copper sulfate; the amount of the post-scavenging inhibitor added is 100 g / t to 200 g / t; and the inhibitor is selected from one or two of lime, sodium humate, and sodium sulfite.

[0029] Preferably, the specific process of adding collector for roughing and scavenging in step S7 is as follows: add 3g / t to 5g / t of collector, stir for 2min to 3min, do roughing, add 1g / t to 2g / t of collector, do one scavenging, add 0.4g / t to 0.8g / t of collector, do two scavenging.

[0030] Compared with the prior art, the technical advantages of the present invention are as follows:

[0031] (1) The present invention adopts a stage flotation method under the condition of stage grinding selection to efficiently separate silver, copper, zinc and sulfur from each other, obtains silver, copper concentrate, zinc concentrate, sulfur concentrate and other concentrate products from the complex shaking table middlings, effectively improves the indicators, realizes efficient recovery of silver, copper, zinc and sulfur from the complex shaking table middlings, and creates good conditions for subsequent cassiterite separation;

[0032] (2) The whole process is compact and conducive to industrialization: the present invention utilizes stage grinding-step flotation technology, and then grinds and efficiently floats to separate silver, copper, zinc and sulfur, thereby realizing the resource recovery of silver, copper, zinc and sulfur in complex shaking table middlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure is a process flow chart of the mineral processing method of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with examples. These examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples that do not specify specific conditions are usually carried out according to conventional conditions in the art or according to the conditions recommended by the manufacturer; the raw materials, reagents, etc. used, unless otherwise specified, are all raw materials and reagents that can be obtained from commercial channels such as conventional markets. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection claimed by the present invention.

[0035] The existing complex shaking table beneficiation technology for silver, copper, zinc and sulfur-containing ores is: mixed flotation of sulfide ores - dedoping of mixed concentrates - separation of silver, copper and zinc and sulfur - separation of zinc and sulfur. Therefore, Comparative Examples 1, 2, 3 and 4 use the existing technology to process the feed ores of Examples 1, 2, 3 and 4.

[0036] Example 1 A beneficiation method for recovering silver, copper, zinc and sulfur from complex shaking table ore

[0037] The samples were selected from the complex shaking table ore containing silver, copper, zinc and sulfur in Inner Mongolia. The main valuable minerals were cassiterite, chalcopyrite, chalcopyrite, argentite, etc. The Ag grade was 15.6 g / t, the Cu grade was 0.08%, the Zn grade was 0.42%, and the S grade was 1.78%.

[0038] The ore dressing method comprises the following steps:

[0039] S1. Grind the raw ore to a size below 0.074 mm, accounting for 80%, to obtain a ground product;

[0040] S2. Silver-copper-sulfur flotation: Add an inhibitor to the ground product obtained in step S1 and stir for 3 minutes, then continue to add a collector for roughing and scavenging, add an inhibitor after scavenging, and perform 2 to 3 rounds of concentrating to obtain a silver-copper-sulfur mixed concentrate and an equal-floating tailings;

[0041] S3: grinding the silver-copper-sulfur mixed concentrate obtained in step S2 to a diameter of less than 0.043 mm, accounting for 85%, to obtain a ground silver-copper-zinc-sulfur mixed concentrate;

[0042] S4. Silver-copper and sulfur flotation separation: adding an inhibitor to the silver-copper-sulfur mixed concentrate obtained in step S3 after grinding and stirring for 2 minutes, then adding a collector for roughing and scavenging, and after scavenging, adding an inhibitor thereto and performing 2 to 3 times of concentrating to obtain a silver-copper concentrate and a sulfur concentrate 1;

[0043] S5. Zinc-sulfur mixed flotation: add an activator to the equal-floating tailings obtained in step S2 and stir for 3 minutes, then add a collector and stir for 3 minutes, add a frother for roughing, add a collector for scavenging, and continue to perform 2 to 3 times of concentrating to obtain a zinc-sulfur mixed concentrate and a floating sulfur tailings;

[0044] S6. Add an inhibitor to the zinc-sulfur mixed concentrate obtained in step S5, and grind the ore to a size of 0.043 mm or less, accounting for 80%, to obtain a ground zinc-sulfur mixed concentrate;

[0045] S7. Zinc-sulfur separation: Add an activator to the zinc-sulfur mixed concentrate obtained after grinding in step S6 and stir for 3 minutes, then add a collector to perform roughing and scavenging, continue to add an inhibitor, perform 3 to 4 times of concentrating, and obtain zinc concentrate and sulfur concentrate 2. Zinc concentrate and sulfur concentrate 2 are obtained.

[0046] The specific drug usage is shown in Table 1.

[0047] Example 2 A beneficiation method for recovering silver, copper, zinc and sulfur from complex shaking table ore

[0048] The sample was selected from a complex shaking table mine containing silver, copper, zinc and sulfur in Yunnan. The main valuable minerals are cassiterite, chalcopyrite, sphalerite, chalcopyrite, argentite, etc., with an Ag grade of 18.3 g / t, a Cu grade of 0.07%, a Zn grade of 0.38% and a S grade of 2.43%.

[0049] The ore dressing method comprises the following process:

[0050] S1. Grind the raw ore to a size below 0.074 mm, accounting for 70%, to obtain a ground product;

[0051] S2. Silver-copper-sulfur flotation: Add an inhibitor to the ground product obtained in step S1 and stir for 3 minutes, then continue to add a collector for roughing and scavenging, add an inhibitor after scavenging, and perform 2 to 3 rounds of concentrating to obtain a silver-copper-sulfur mixed concentrate and an equal-floating tailings;

[0052] S3: grinding the silver-copper-sulfur mixed concentrate obtained in step S2 to a diameter of less than 0.043 mm, accounting for 75%, to obtain a ground silver-copper-zinc-sulfur mixed concentrate;

[0053] S4. silver-copper and sulfur flotation separation: adding an inhibitor to the silver-copper-sulfur mixed concentrate obtained in step S3 after grinding and stirring for 3 minutes, then adding a collector for roughing and scavenging, after scavenging, adding an inhibitor thereto, and performing 2 to 3 times of concentrating to obtain a silver-copper concentrate and a sulfur concentrate 1;

[0054] S5. Zinc-sulfur mixed flotation: add an activator to the equal-floating tailings obtained in step S2 and stir for 3 minutes, then add a collector and stir for 3 minutes, add a frother for roughing, add a collector for scavenging, and continue 2 to 3 times of blank selection without adding reagents to improve the concentrate grade, and obtain a zinc-sulfur mixed concentrate and floating sulfur tailings;

[0055] S6. Add an inhibitor to the zinc-sulfur mixed concentrate obtained in step S5, and grind the ore to a size of 0.043 mm or less, accounting for 75%, to obtain a ground zinc-sulfur mixed concentrate;

[0056] S7. Zinc-sulfur separation: Add an activator to the zinc-sulfur mixed concentrate obtained after grinding in step S6 and stir for 3 minutes, then add a collector to perform roughing and scavenging, continue to add an inhibitor, perform 3 to 4 times of concentrating, and obtain zinc concentrate and sulfur concentrate 2. Zinc concentrate and sulfur concentrate 2 are obtained.

[0057] The specific use of selected drugs is shown in Table 1.

[0058] Example 3 A beneficiation method for recovering silver, copper, zinc and sulfur from complex shaking table ore

[0059] The sample was selected from a complex shaking table mine containing silver, copper, zinc and sulfur in Hunan. The main valuable minerals are cassiterite, chalcopyrite, sphalerite, chalcopyrite, argentite, etc., among which the Ag grade is 24.3g / t, the Cu grade is 0.05%, the Zn grade is 0.44, and the S grade is 1.73%.

[0060] The ore dressing method comprises the following steps:

[0061] S1. Grind the raw ore to a size below 0.074 mm, accounting for 75%, to obtain the ground product;

[0062] S2. Silver-copper-sulfur flotation: Add an inhibitor to the ground product obtained in step S1 and stir for 3 minutes, then continue to add a collector for roughing and scavenging, add an inhibitor after scavenging, and perform 2 to 3 rounds of concentrating to obtain a silver-copper-sulfur mixed concentrate and an equal-floating tailings;

[0063] S3: grinding the silver-copper-sulfur mixed concentrate obtained in step S2 to a diameter of less than 0.043 mm, accounting for 80%, to obtain a ground silver-copper-zinc-sulfur mixed concentrate;

[0064] S4. silver-copper and sulfur flotation separation: adding an inhibitor to the silver-copper-sulfur mixed concentrate obtained in step S3 after grinding and stirring for 3 minutes, then adding a collector for roughing and scavenging, after scavenging, adding an inhibitor thereto, and performing 2 to 3 times of concentrating to obtain a silver-copper concentrate and a sulfur concentrate 1;

[0065] S5. Zinc-sulfur mixed flotation: add an activator to the equal-floating tailings obtained in step S2 and stir for 3 minutes, then add a collector and stir for 3 minutes, add a frother for roughing, add a collector for scavenging, and continue to perform 2 to 3 times of concentrating to obtain a zinc-sulfur mixed concentrate and a floating sulfur tailings;

[0066] S6. Add an inhibitor to the zinc-sulfur mixed concentrate obtained in step S5, and grind the ore to a size of 0.043 mm or less, accounting for 78%, to obtain a ground zinc-sulfur mixed concentrate;

[0067] S7. Zinc-sulfur separation: Add an activator to the zinc-sulfur mixed concentrate obtained after grinding in step S6 and stir for 3 minutes, then add a collector to perform roughing and scavenging, continue to add an inhibitor, perform 3 to 4 times of concentrating, and obtain zinc concentrate and sulfur concentrate 2. Zinc concentrate and sulfur concentrate 2 are obtained.

[0068] The specific use of selected drugs is shown in Table 2.

[0069] Example 4 A beneficiation method for recovering silver, copper, zinc and sulfur from complex shaking table ore

[0070] The sample was selected from a complex shaking table mine containing silver, copper, zinc and sulfur in Guangxi. The main valuable minerals are cassiterite, chalcopyrite, sphalerite, chalcopyrite, argentite, etc., among which the Ag grade is 27.3g / t, the Cu grade is 0.09%, the Zn grade is 0.42%, and the S grade is 1.95%.

[0071] The ore dressing method comprises the following steps:

[0072] S1. Grind the raw ore to a size below 0.074 mm, accounting for 78%, to obtain the ground product;

[0073] S2. Silver-copper-sulfur flotation: Add an inhibitor to the ground product obtained in step S1 and stir for 3 minutes, then continue to add a collector for roughing and scavenging, add an inhibitor after scavenging, and perform 2 to 3 rounds of concentrating to obtain a silver-copper-sulfur mixed concentrate and an equal-floating tailings;

[0074] S3: grinding the silver-copper-sulfur mixed concentrate obtained in step S2 to a diameter of less than 0.043 mm, accounting for 82%, to obtain a ground silver-copper-zinc-sulfur mixed concentrate;

[0075] S4. silver-copper and sulfur flotation separation: adding an inhibitor to the silver-copper-sulfur mixed concentrate obtained in step S3 after grinding and stirring for 3 minutes, then adding a collector for roughing and scavenging, after scavenging, adding an inhibitor thereto, and performing 2 to 3 times of concentrating to obtain a silver-copper concentrate and a sulfur concentrate 1;

[0076] S5. Zinc-sulfur mixed flotation: add an activator to the equal-floating tailings obtained in step S2 and stir for 3 minutes, then add a collector and stir for 3 minutes, add a frother for roughing, add a collector for scavenging, and continue to perform 2 to 3 times of concentrating to obtain a zinc-sulfur mixed concentrate and a floating sulfur tailings;

[0077] S6. Add an inhibitor to the zinc-sulfur mixed concentrate obtained in step S5, and grind the ore to a size of 0.043 mm or less, accounting for 75%, to obtain a ground zinc-sulfur mixed concentrate;

[0078] S7. Zinc-sulfur separation: Add an activator to the zinc-sulfur mixed concentrate obtained after grinding in step S6 and stir for 3 minutes, then add a collector to perform roughing and scavenging, continue to add an inhibitor, perform 3 to 4 times of concentrating, and obtain zinc concentrate and sulfur concentrate 2. Zinc concentrate and sulfur concentrate 2 are obtained.

[0079] The specific use of selected drugs is shown in Table 2, and the specific indicators are shown in Table 5.

[0080] Comparative Example 1 A mineral processing method

[0081] The method for beneficiating complex shaking table ore containing silver, copper, zinc and sulfur comprises the following steps:

[0082] S1. Grind the feed ore to less than 0.074mm, accounting for 80%;

[0083] S2. Silver, copper, zinc and sulfur mixed flotation: Add collector and frother to the grinding product to carry out silver, copper, zinc and sulfur mixed flotation to obtain silver, copper, zinc and sulfur mixed concentrate and floating sulfur tailings;

[0084] S3. Adding activated carbon to the silver-copper-zinc-sulfur mixed concentrate for drug removal;

[0085] S4. Grinding the de-doped silver, copper, zinc and sulfur mixed concentrate to a size of less than 0.043 mm, accounting for 82%;

[0086] S5. Silver-copper and zinc-sulfur flotation separation: adding inhibitors and collectors to the ground silver-copper-zinc-sulfur mixed concentrate for flotation to obtain silver-copper concentrate and zinc-sulfur mixed concentrate;

[0087] S6. Zinc-sulfur separation: Add inhibitors, activators and collectors to the zinc-sulfur mixed concentrate to separate zinc and sulfur to obtain zinc concentrate and sulfur concentrate.

[0088] The ore feeding is the same as that in Example 1. The specific reagent usage is shown in Table 3.

[0089] Comparative Example 2 A mineral processing method

[0090] The method for beneficiating complex shaking table ore containing silver, copper, zinc and sulfur comprises the following steps:

[0091] S1. Grind the feed ore to less than 0.074mm, accounting for 70%;

[0092] S2. Silver, copper, zinc and sulfur mixed flotation: Add collector and frother to the grinding product to carry out silver, copper, zinc and sulfur mixed flotation to obtain silver, copper, zinc and sulfur mixed concentrate and floating sulfur tailings;

[0093] S3. Adding activated carbon to the silver-copper-zinc-sulfur mixed concentrate for drug removal;

[0094] S4. Grinding the de-doped silver, copper, zinc and sulfur mixed concentrate to a size of less than 0.043 mm, accounting for 85%;

[0095] S5. Silver-copper and zinc-sulfur flotation separation: adding inhibitors and collectors to the silver-copper-zinc-sulfur mixed concentrate after grinding for flotation to obtain silver-copper concentrate and zinc-sulfur mixed concentrate;

[0096] S6. Zinc-sulfur separation: Add inhibitors, activators and collectors to the zinc-sulfur mixed concentrate to separate zinc and sulfur to obtain zinc concentrate and sulfur concentrate.

[0097] The ore feeding is the same as that in Example 2. The specific reagent usage is shown in Table 3, and the specific indicators are shown in Table 6.

[0098] Comparative Example 3 A mineral processing method

[0099] The method for beneficiating complex shaking table ore containing silver, copper, zinc and sulfur comprises the following steps:

[0100] S1. Grind the feed ore to less than 0.074 mm, accounting for 75%;

[0101] S2. Silver, copper, zinc and sulfur mixed flotation: Add collector and frother to the grinding product to carry out silver, copper, zinc and sulfur mixed flotation to obtain silver, copper, zinc and sulfur mixed concentrate and floating sulfur tailings;

[0102] S3. Adding activated carbon to the silver-copper-zinc-sulfur mixed concentrate for drug removal;

[0103] S4. Grinding the de-doped silver, copper, zinc and sulfur mixed concentrate to a size of less than 0.043 mm, accounting for 80%;

[0104] S5. Silver-copper and zinc-sulfur flotation separation: adding inhibitors and collectors to the silver-copper-zinc-sulfur mixed concentrate after grinding for flotation to obtain silver-copper concentrate and zinc-sulfur mixed concentrate;

[0105] S6. Zinc-sulfur separation: Add inhibitors, activators and collectors to the zinc-sulfur mixed concentrate to separate zinc and sulfur to obtain zinc concentrate and sulfur concentrate.

[0106] The ore feeding is the same as that in Example 3. The specific reagent usage is shown in Table 4, and the specific indicators are shown in Table 6.

[0107] Comparative Example 4 A mineral processing method

[0108] The method for beneficiating complex shaking table ore containing silver, copper, zinc and sulfur comprises the following steps:

[0109] S1. Grinding the feed ore to less than 0.074 mm accounts for 78%;

[0110] S2. Silver, copper, zinc and sulfur mixed flotation: Add collector and frother to the grinding product to carry out silver, copper, zinc and sulfur mixed flotation to obtain silver, copper, zinc and sulfur mixed concentrate and floating sulfur tailings;

[0111] S3. Adding activated carbon to the silver-copper-zinc-sulfur mixed concentrate for drug removal;

[0112] S4. Grinding the de-doped silver, copper, zinc and sulfur mixed concentrate to a size of less than 0.043 mm, accounting for 82%;

[0113] S5. Silver-copper and zinc-sulfur flotation separation: adding inhibitors and collectors to the ground silver-copper-zinc-sulfur mixed concentrate for flotation to obtain silver-copper concentrate and zinc-sulfur mixed concentrate;

[0114] S6. Zinc-sulfur separation: Add inhibitors, activators and collectors to the zinc-sulfur mixed concentrate to separate zinc and sulfur to obtain zinc concentrate and sulfur concentrate.

[0115] The ore feeding is the same as that in Example 4. The specific reagent usage is shown in Table 4, and the specific indicators are shown in Table 6.

[0116] Table 1: The reagent usage of the ore dressing method of Examples 1 to 2

[0117]

[0118]

[0119] Table 2: Reagent usage of the ore dressing method of Examples 3 to 4

[0120]

[0121]

[0122] Table 3 Comparative Examples 1 to 2 of the ore dressing method using reagents

[0123]

[0124] Table 4: The use of reagents in the mineral processing methods of comparative examples 3 to 4

[0125]

[0126] Test example: Ore grade detection

[0127] 1. Test sample: concentrate recovered from Examples 1-4 and Comparative Examples 1-4;

[0128] 2. Test process: Use ICP inductively coupled plasma spectrometer to measure silver / low tin / low zinc (0.1-10%), gravimetric method to measure sulfur / high copper / high zinc / high tin (more than 10%), and XRF fluorescence analyzer to measure low copper (no more than 0.1%) and low tin (no more than 0.1%).

[0129] 3. Test results: The specific test results are shown in Table 5 and Table 6. The selection results of each embodiment are shown in Table 5, and the selection results of each comparative example are shown in Table 6.

[0130] Table 5 Selection results of various embodiments (%)

[0131]

[0132] Table 6 Selection results of each comparative example (%)

[0133]

[0134] It can be seen from Tables 5 and 6 above that the recovery method of the present invention can well recover silver, copper, zinc and sulfur from the shaking table ore containing silver, copper, zinc and sulfur, specifically:

[0135] In Example 1, the Ag grade of the silver-copper concentrate is 3287.9 ​​g / t, and the Ag recovery rate can reach 70.61%, the Cu grade is 16.34%, and the Cu recovery rate is 68.58%, the Zn grade of the zinc concentrate is 41.09%, and the Zn recovery rate is 65.63%, the 1S grade of the sulfur concentrate is 39.63%, and the S recovery rate is 11.81%, the 2S grade of the sulfur concentrate is 38.67%, and the S recovery rate is 53.49%, and the total S recovery rate is 65.30%; in Comparative Example 1, the Ag grade of the silver-copper concentrate is 1807.5 g / t, the Ag recovery rate is 56.70%, the Cu grade is 9.69%, and the Cu recovery rate is 56.35%, the Zn grade of the zinc concentrate is 27.59%, and the Zn recovery rate is 55.82%, the S grade of the sulfur concentrate is 36.19%, and the S recovery rate is 59.99%. Therefore, compared with Comparative Example 1, the silver-copper concentrate obtained in Example 1 of the present invention has a silver grade of 1480.4 g / t higher, a copper grade of 6.65% higher, a silver recovery rate of 13.91% higher, a copper recovery rate of 12.23% higher, a zinc grade of 13.50% higher, a zinc recovery rate of 9.81% higher, a sulfur concentrate grade of 2%-3% higher, and a sulfur recovery rate of 5.31% higher;

[0136] In Example 2, the Ag grade of the silver-copper concentrate is 4326.8 g / t, and the Ag recovery rate can reach 74.90%, the Cu grade is 18.12%, and the Cu recovery rate is 72.01%, the Zn grade of the zinc concentrate is 42.15%, and the Zn recovery rate is 69.79%, the 1S grade of the sulfur concentrate is 40.85%, and the S recovery rate is 12.05%, the 2S grade of the sulfur concentrate is 37.29%, and the S recovery rate is 53.36%, and the total S recovery rate is 65.41%; in Comparative Example 2, the Ag grade of the silver-copper concentrate is 2567.8 g / t, the Ag recovery rate is 61.90%, the Cu grade is 10.29%, and the Cu recovery rate is 52.92%, the Zn grade of the zinc concentrate is 24.16%, and the Zn recovery rate is 54.31%, the S grade of the sulfur concentrate is 36.26%, and the S recovery rate is 54.38%. Therefore, compared with Comparative Example 2, the silver-copper concentrate obtained in Example 2 of the present invention has a silver grade of 1759 g / t higher, a copper grade of 7.83% higher, a silver recovery rate of 13.00% higher, a copper recovery rate of 19.09% higher, a zinc grade of 17.99% higher, a zinc recovery rate of 15.48% higher, a sulfur concentrate grade that is basically equivalent, and a sulfur recovery rate of 11.03 higher.

[0137] In Example 3, the Ag grade of the silver-copper concentrate is 3826.4 g / t, and the Ag recovery rate can reach 75.98%, the Cu grade is 17.34%, and the Cu recovery rate is 69.47%, the Zn grade of the zinc concentrate is 43.52%, and the Zn recovery rate is 71.43%, the 1S grade of the sulfur concentrate is 39.61%, and the S recovery rate is 13.42%, the 2S grade of the sulfur concentrate is 35.29%, and the S recovery rate is 48.84%, and the total S recovery rate is 62.26%; in Comparative Example 3, the Ag grade of the silver-copper concentrate is 1967.5 g / t, the Ag recovery rate is 57.33%, the Cu grade is 9.19%, and the Cu recovery rate is 53.44%, the Zn grade of the zinc concentrate is 23.91%, and the Zn recovery rate is 58.45%, the S grade of the sulfur concentrate is 35.01%, and the S recovery rate is 49.29%. Therefore, compared with Comparative Example 3, the silver-copper concentrate obtained in Example 3 of the present invention has a silver grade of 1858.9 g / t higher, a copper grade of 8.15% higher, a silver recovery rate of 18.65% higher, a copper recovery rate of 16.03% higher, a zinc grade of 19.61% higher, a zinc recovery rate of 12.98% higher, a sulfur concentrate grade of substantially the same, and a sulfur recovery rate of 12.97% higher.

[0138] In Example 4, the Ag grade of the silver-copper concentrate is 5167.8 g / t, and the Ag recovery rate can reach 70.35%, the Cu grade is 19.16%, and the Cu recovery rate is 68.36%, the Zn grade of the zinc concentrate is 38.91%, and the Zn recovery rate is 75.76%, the 1S grade of the sulfur concentrate is 41.93%, and the S recovery rate is 8.97%, the 2S grade of the sulfur concentrate is 37.61%, and the S recovery rate is 56.80%, and the total S recovery rate is 65.77%; in Comparative Example 4, the Ag grade of the silver-copper concentrate is 2615.5 g / t, the Ag recovery rate is 52.47%, the Cu grade is 10.05%, and the Cu recovery rate is 51.62%, the Zn grade of the zinc concentrate is 24.16%, and the Zn recovery rate is 64.92%, the S grade of the sulfur concentrate is 37.41%, and the S recovery rate is 54.85%. Therefore, compared with Comparative Example 4, the silver-copper concentrate obtained in Example 4 has a silver grade of 2552.3 g / t higher, a copper grade of 9.11% higher, a silver recovery rate of 17.88% higher, a copper recovery rate of 16.74% higher, a zinc grade of 14.75% higher, a zinc recovery rate of 10.84% ​​higher, a sulfur concentrate grade that is basically the same, and a sulfur recovery rate of 10.92% higher.

[0139] In summary, it can be seen that the indicators obtained by the method of the present invention are significantly higher than those obtained by the prior art, and the present invention can obtain silver-copper concentrate, zinc concentrate and sulfur concentrate with higher grade and recovery rate.

[0140] Finally, it should be noted that the above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A beneficiation method for recovering silver, copper, zinc and sulfur from complex shaking table ore, characterized in that: The steps include: S1. Grinding the raw ore to obtain a grinding product; S2. Silver-copper-sulfur flotation: adding an inhibitor to the grinding product obtained in step S1, adding a collector for roughing and scavenging, and then adding an inhibitor for concentrating to obtain a silver-copper-sulfur mixed concentrate and an isoflurane tailings; S3. Grinding the silver-copper-sulfur mixed concentrate obtained in step S2 to obtain a ground silver-copper-zinc-sulfur mixed concentrate; S4. silver-copper and sulfur flotation separation: adding an inhibitor to the silver-copper-zinc-sulfur mixed concentrate obtained after grinding in step S3, adding a collector for roughing and scavenging, and then adding an inhibitor for concentrating to obtain a silver-copper concentrate and a sulfur concentrate 1; S5. Zinc-sulfur mixed flotation: adding an activator, a collector, and a frother to the equal-floating tailings obtained in step S2 for roughing, adding a collector for scavenging, and then concentrating to obtain a zinc-sulfur mixed concentrate and floating sulfur tailings; S6. adding an inhibitor to the zinc-sulfur mixed concentrate obtained in step S5, and grinding the ore to obtain a ground zinc-sulfur mixed concentrate; S7. Zinc-sulfur separation: adding an activator to the zinc-sulfur mixed concentrate obtained after grinding in step S6, then adding a collector for roughing and scavenging, and then adding an inhibitor for concentrating, to obtain zinc concentrate and sulfur concentrate 2.

2. The ore dressing method according to claim 1, characterized in that: The Ag grade of the ground ore product in step S1 is 9.8 g / t to 24.3 g / t, the Cu grade is 0.05% to 0.11%, the Zn grade is 0.38% to 0.55%, and the S grade is 1.41% to 2.43%.

3. The ore dressing method according to claim 1, characterized in that: In step S2, the amount of inhibitor added to the ground product is 2000g / t to 4000g / t, and the amount of inhibitor added during concentration is 200g / t to 600g / t. The inhibitor is selected from any two of sodium carbonate, zinc sulfate, and sodium sulfite.

4. The ore dressing method according to claim 1, characterized in that: The roughing process in step S2 is as follows: adding 80 g / t to 120 g / t of collector, stirring for 2 min to 3 min, and performing roughing; the scavenging process is as follows: adding 20 g / t to 30 g / t of collector, performing a scavenging, adding 10 g / t to 15 g / t of collector, and performing a second scavenging; the collector is selected from one or two of butyl ammonium black medicine, Z200, ethyl xanthate, and ethyl dixanthate.

5. The ore dressing method according to claim 1, characterized in that: The amount of inhibitor added to the silver-copper-sulfur mixed concentrate after grinding in step S4 is 300g / t to 600g / t, and the amount of inhibitor added during the selection is 60g / t to 120g / t; the inhibitor is selected from one or two of lime, sodium humate and sodium sulfite.

6. The ore dressing method according to claim 1, characterized in that: The roughing process in step S4 is as follows: adding 3g / t to 6g / t of collector, stirring for 2min to 3min, and roughing; the scavenging process is as follows: adding 0.5g / t to 1g / t of collector, scavenging once, adding 0.3g / t to 0.5g / t of collector, and scavenging twice; the collector is selected from one or both of Y89 yellow medicine and Z200.

7. The ore dressing method according to claim 1, characterized in that: In step S5, the amount of the activator added during rough selection is 100 g / t to 800 g / t; the amount of the collector added is 120 g / t to 160 g / t; the amount of the foaming agent added is 15 g / t to 25 g / t; the process of adding the collector for scavenging is as follows: adding 20 g / t to 30 g / t of the collector for one scavenging, adding 10 g / t to 20 g / t of the collector for a second scavenging; the activator described in step S5 is selected from one or two of copper sulfate and oxalic acid, the collector is selected from one or two of butyl xanthate and ethyl xanthate, and the foaming agent is selected from one of pine oil and methyl isobutyl carbinol.

8. The ore dressing method according to claim 1, characterized in that: In step S6, the amount of the inhibitor added is 400 g / t to 800 g / t, and the inhibitor is selected from one or both of lime and sodium humate.

9. The ore dressing method according to claim 1, characterized in that: In step S7, the amount of the activator added is 10 g / t to 15 g / t, and the activator is copper sulfate; the amount of the inhibitor added is 100 g / t to 200 g / t; and the inhibitor is selected from one or two of lime, sodium humate, and sodium sulfite.

10. The ore dressing method according to claim 1, characterized in that: The roughing process in step S7 is as follows: adding 3g / t to 5g / t of collector, stirring for 2min to 3min, and performing roughing; the scavenging process is as follows: adding 1g / t to 2g / t of collector, performing a scavenging, adding 0.4g / t to 0.8g / t of collector, and performing a second scavenging; the collector in step S7 is selected from one or two of ethyl xanthate, butyl xanthate, and Z200.

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