A flotation reagent and a method for flotation separation of copper-molybdenum-sulfur metal ore

Abstract

The application provides a kind of flotation reagent and copper molybdenum sulphide metal ore flotation separation method, it is related to the field of mineral processing. Specifically, the flotation reagent includes depressor and collector;Among them, the depressor includes at least one of guar gum, locust bean gum or fenugreek gum;Collector includes at least one of ethyl thioamino formic acid-O-(1-methylethyl) ester, diethyl phthalate or amidinothiourea. The application is based on the lead-zinc-copper-molybdenum-sulfur mixed flotation separation process in the prior art, to solve the defects of insufficient product grade or recovery rate, or complex process flow, etc., the application provides a new type of sulphide collector and depressor from the combination of flotation reagent and process flow, and an efficient and simple short process, to realize the mixed flotation of copper molybdenum sulphide and its efficient separation, with good application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ore dressing, in particular to a flotation reagent and a flotation separation method of copper-molybdenum-sulfur metal ore. BACKGROUND

[0002] Chalcopyrite, as the main copper-containing mineral, usually coexists with pyrite, molybdenite and other sulfur-containing minerals, and forms a copper-molybdenum-sulfur polymetallic sulfide deposit; thus, the effective separation of copper-molybdenum-sulfur is of great significance for the efficient development of copper resources. Currently, for low-grade co-associated copper-molybdenum-sulfur resources, a bulk flotation process is often used, that is, a large amount of activator and sulfide ore collector are added to recover copper together, which leads to the difficulty in effective separation of molybdenum-sulfur after bulk flotation, and thus the effective utilization is impossible.

[0003] Patent CN202111332583.4 discloses a separation and recovery method of ultra-low-grade refractory copper-molybdenum-sulfur ore, which develops a magnetic separation and flotation combined and coordinated separation and recovery process. The copper-molybdenum mixed sulfide ore is first subjected to mixed flotation to obtain a copper-molybdenum mixed rough concentrate, and then the copper-molybdenum mixed rough concentrate is subjected to pre-separation by magnetic separation to obtain a magnetic separation concentrate copper sulfide and a magnetic separation tailing molybdenum sulfide. Finally, the magnetic separation concentrate and tailings are re-enriched by flotation to obtain copper sulfide and molybdenum sulfide concentrate products, respectively. The process can realize economic and efficient recovery of different grade copper-molybdenum mixed sulfide ore resources, can greatly reduce the amount of sodium sulfide, improve the working environment and reduce the environmental risk; however, the method does not realize the separation of copper, molybdenum and sulfur, and involves a magnetic separation step, which has a long process flow and high energy consumption.

[0004] Patent CN201911248477.0 discloses a copper, molybdenum, sulfur multi-metal separation flotation method, which comprises: mixing the raw ore with lime and grinding, and then adding flotation reagent A (dextrin, TS-1, 2# oil) for once roughing, once cleaning and once scavenging to obtain copper concentrate and tailings A; then adding flotation reagent B (TM-8) to tailings A for once roughing, four times cleaning and once scavenging to obtain molybdenum concentrate and tailings B; and then adding flotation reagent C (sulfur, butyl xanthate) to tailings B for once roughing, twice cleaning and once scavenging to obtain sulfur concentrate and tailings D. The method realizes multi-element separation and has comprehensive recovery value; however, the grade and recovery rate of copper, molybdenum and sulfur in the method still cannot achieve a high level.

[0005] In view of this, the present application is proposed. SUMMARY

[0006] The first object of the present application is to provide a flotation reagent for copper-sulfur ore, which is particularly suitable for the inhibition or collection of sulfur in copper-molybdenum-sulfur polymetallic ore, and the flotation effect is improved by using specific functional groups and compound combinations.

[0007] The second object of the present application is to provide a flotation separation method of copper-molybdenum-sulfur metal ore, based on the lead-zinc-copper-molybdenum-sulfur mixed flotation separation process existing in the prior art, in order to solve the defects of insufficient product grade or recovery rate, or complex process flow, etc., the present application provides a new type of sulfur mineral depressant and a high-efficiency simple short process to realize the efficient separation of copper-molybdenum-sulfur mixed flotation from the combination of flotation reagents and process flow.

[0008] In order to achieve the above object of the present application, the following technical solutions are adopted:

[0009] A flotation reagent for copper-sulfur minerals, comprising a depressant and a collector;

[0010] The depressant comprises at least one of guar gum, locust bean gum or fenugreek gum.

[0011] The collector comprises at least one of ethyl thioaminoformic acid-O-(1-methylethyl) ester, diethyl phthalate and amidinothiourea.

[0012] A flotation separation method of copper-molybdenum-sulfur metal ore, using the flotation reagent for copper-sulfur minerals.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] (1) The sulfur mineral depressant provided by the present application uses at least one of guar gum, locust bean gum or fenugreek gum, which can realize the effective separation of copper-sulfur minerals. Through the combination of metal ions and -COOH in the synergistic effect of the gum reagent, selective adsorption on the surface Fe atoms of pyrite and chalcopyrite is realized, and high-efficiency separation of chalcopyrite and pyrite is realized.

[0015] (2) The present application uses specific flotation reagents and gradient flotation process for copper-molybdenum-sulfur polymetallic ore, which reduces the dosage of reagents, and realizes high-efficiency separation and high-grade recovery of copper, molybdenum and sulfur. DETAILED DESCRIPTION

[0016] The technical solutions of the present application will be described clearly and completely in combination with the specific embodiments below, but those skilled in the art will understand that the following described embodiments are part of the embodiments of the present application, not all the embodiments, and are only used to illustrate the present application, and should not be regarded as limiting the scope of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The specific conditions not mentioned in the embodiments are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not marked with the manufacturer, which are all conventional products that can be purchased on the market. In addition, the terms "one", "two", "1", "2" are only used for description purposes, and cannot be understood as indicating or implying relative importance.

[0017] The first aspect of the present application is to provide a flotation reagent for copper-sulfur minerals; wherein the flotation reagent comprises an inhibitor and a collector, the inhibitor comprises at least one of guar gum, locust bean gum or fenugreek gum, and the collector comprises at least one of ethyl thiocarbamic acid-O-(1-methylethyl) ester, diethyl phthalate or amidinothiourea.

[0018] As a preferred embodiment, the inhibitor comprises a combination of guar gum, locust bean gum and fenugreek gum; in some more preferred embodiments, the mass ratio of the guar gum, the locust bean gum and the fenugreek gum is (2-6):(1-2):(2-6).

[0019] As a preferred embodiment, based on the high viscosity and thickening properties of the inhibitor component, the thickening agent is dispersed in an aqueous solution before the inhibitor is used, and is added in the form of an aqueous solution.

[0020] As a preferred embodiment, the collector comprises a combination of ethyl thiocarbamic acid-O-(1-methylethyl) ester, diethyl phthalate and amidinothiourea; in some more preferred embodiments, the mass ratio of the ethyl thiocarbamic acid-O-(1-methylethyl) ester, the diethyl phthalate and the amidinothiourea is (4-7):(1-5):(4-9).

[0021] The three optional collector components used in the present application are all compounds with fixed molecular formula and molecular structure; wherein the CAS number of ethyl thiocarbamic acid-O-(1-methylethyl) ester is 141-98-0, the CAS number of diethyl phthalate is 84-66-2, and the CAS number of amidinothiourea is 2114-02-5. In the implementation process of the present application, commercially available industrial grade pure product can be purchased as a collector.

[0022] The second aspect of the present application provides a flotation separation method of copper-molybdenum-sulfur metal ore, which uses the flotation reagent for copper-sulfur ore as described in the first aspect above.

[0023] The flotation separation method mainly comprises the following steps: (1) copper-sulfur mixed flotation: performing once roughing on the copper-molybdenum-sulfur metal ore slurry, performing three times scavenging on the roughing tailings, and obtaining copper-molybdenum-sulfur mixed flotation concentrate and tailings; (2) copper-sulfur separation flotation: performing once second roughing, three times second scavenging and twice second cleaning on the copper-molybdenum-sulfur mixed flotation concentrate slurry, and obtaining copper-molybdenum concentrate and sulfur-containing tailings.

[0024] As a preferred embodiment, in step (1), the concentration of the copper-molybdenum-sulfur metal ore slurry is 30% to 40%, and the pH of the slurry is adjusted to 6 to 8; in the present application, the solvent of the slurry is water by default.

[0025] As a preferred embodiment, the flotation reagent involved in step (1) includes the depressant and the collector as described in the first aspect, and a frother; in some more preferred embodiments, the frother includes pine oil.

[0026] As a preferred embodiment, in step (1), the dosage of the reagent for roughing includes: 1000 to 2000 g / t of depressant, 50 to 200 g / t of collector and 20 to 50 g / t of frother, based on the mass of the slurry; in some optional embodiments, the dosage of the depressant includes but is not limited to any one of 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000 (g / t) or a numerical range composed of any two of them; the dosage of the collector includes but is not limited to any one of 50, 60, 80, 100, 120, 150, 175, 180, 190, 200 (g / t) or a numerical range composed of any two of them; the dosage of the frother includes but is not limited to any one of 20, 30, 40, 50 (g / t) or a numerical range composed of any two of them.

[0027] As a preferred embodiment, in step (1), the dosage of the selected reagents includes: the dosage of the depressant in the first cleaning is 200-500 g / t, and the dosage of the depressant in the second cleaning is 50-150 g / t, based on the mass of the ore pulp; in some alternative embodiments, the dosage of the depressant in the first cleaning includes but is not limited to any one of 200, 250, 300, 350, 400, 450, 500 (g / t) or a numerical range formed by any two of them, and the dosage of the depressant in the second cleaning includes but is not limited to any one of 50, 60, 80, 100, 120, 125, 140, 150 (g / t) or a numerical range formed by any two of them.

[0028] As a preferred embodiment, in step (1), the dosage of the selected reagents includes: the dosage of the depressant in the first cleaning is 200-500 g / t, and the dosage of the depressant in the second cleaning is 50-150 g / t, based on the mass of the ore pulp; in some alternative embodiments, the dosage of the depressant in the first cleaning includes but is not limited to any one of 200, 250, 300, 350, 400, 450, 500 (g / t) or a numerical range formed by any two of them, and the dosage of the depressant in the second cleaning includes but is not limited to any one of 50, 60, 80, 100, 120, 125, 140, 150 (g / t) or a numerical range formed by any two of them.

[0029] It can be understood that, in some preferred embodiments, in step (1), only the depressant is added in the cleaning process, and only the collector is added in the scavenging process; and no additional reagent is added in the third scavenging process.

[0030] As a preferred embodiment, in step (2), the concentration of the copper-molybdenum-sulfur mixed flotation concentrate ore pulp is 20%-30%, and the pH of the ore pulp is adjusted to 8-9; in the present application, the solvent of the ore pulp is water by default.

[0031] As a more preferred embodiment, in steps (1) and (2), the acid-base reagent used to adjust the pH of the ore pulp includes but is not limited to quicklime and lime products, hydrochloric acid, etc.

[0032] As a preferred embodiment, in step (2), the flotation reagents involved include the depressant and the collector as described in the first aspect, and a frother; in some more preferred embodiments, the frother includes pine oil.

[0033] As a preferred embodiment, in step (2), the dosage of the second roughing includes: 1200-2500 g / t of depressant, 50-250 g / t of collector and 10-15 g / t of frother, based on the mass of the ore pulp; in some alternative embodiments, the dosage of the depressant includes but is not limited to any one of 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500 (g / t) or a numerical range constituted by any two of them; the dosage of the collector includes but is not limited to any one of 50, 60, 80, 100, 125, 150, 175, 200, 225, 240, 250 (g / t) or a numerical range constituted by any two of them; the dosage of the frother includes but is not limited to any one of 10, 11, 12, 13, 14, 15 (g / t) or a numerical range constituted by any two of them.

[0034] As a preferred embodiment, in step (2), the dosage of the second cleaning includes: 100-350 g / t of depressant in the first second cleaning and 50-150 g / t of depressant in the second second cleaning, based on the mass of the ore pulp; in some alternative embodiments, the dosage of the depressant in the first second cleaning includes but is not limited to any one of 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350 (g / t) or a numerical range constituted by any two of them, and the dosage of the depressant in the second second cleaning includes but is not limited to any one of 50, 60, 80, 100, 120, 125, 140, 150 (g / t) or a numerical range constituted by any two of them.

[0035] As a preferred embodiment, in step (2), the dosage of the second scavenging includes: 50-100 g / t of collector in the first second scavenging, 80-120 g / t of collector in the second second scavenging and 30-50 g / t of collector in the third second scavenging, based on the mass of the ore pulp; in some alternative embodiments, the dosage of the collector in the first second scavenging includes but is not limited to any one of 50, 60, 70, 80, 90, 100 (g / t) or a numerical range constituted by any two of them, the dosage of the collector in the second second scavenging includes but is not limited to any one of 80, 90, 100, 110, 120 (g / t) or a numerical range constituted by any two of them, and the dosage of the collector in the third second scavenging includes but is not limited to any one of 30, 35, 40, 45, 50 (g / t) or a numerical range constituted by any two of them.

[0036] It will be appreciated that in some preferred embodiments, in step (2) only depressants are added in the cleaning process and only collectors are added in the scavenging process.

[0037] The mineral source in the following examples of the present application is a low grade copper ore from a certain place in Jiangxi Province, and the specific mineral composition includes chalcopyrite, pyrite, molybdenite, quartz, mica, etc. It is detected that in the mineral raw material: the copper grade is 0.3%, the molybdenum grade is 0.01%, and the sulfur grade is 1.5%.

[0038] Example 1

[0039] The reagents used in this example are: depressants (guar gum, locust bean gum and fenugreek gum, mass ratio 4:1:4), collectors (ethyl thiocarbamic acid-O-(1-methylethyl) ester, diethyl phthalate and amidinothiourea, mass ratio 2:1:2), and frother (pine alcohol oil).

[0040] This example is carried out according to the following steps for flotation separation:

[0041] (S1) Grinding and conditioning:

[0042] The raw ore is ground to 65% passing 0.074 mm, and water is added to adjust the pulp concentration to 35%.

[0043] (S2) Copper-sulfur bulk flotation:

[0044] First, the pulp pH is adjusted to 8 with hydrochloric acid / lime, and 2000 g / t of depressant, 200 g / t of collector, and 50 g / t of frother are added based on the mass of the pulp to perform one roughing to obtain roughing concentrate and roughing tailings.

[0045] Three scavenging operations are performed on the roughing tailings. In the first scavenging, the collector is used at a dosage of 100 g / t, and in the second scavenging, the collector is used at a dosage of 30 g / t, based on the mass of the pulp. The scavenging concentrates in this step are all discarded and not recycled.

[0046] Two cleaning operations are performed on the roughing concentrate. In the first cleaning, the depressant is used at a dosage of 500 g / t, and in the second cleaning, the depressant is used at a dosage of 150 g / t, based on the mass of the pulp. The cleaning tailings in this step are all discarded and not recycled; the concentrate after the second cleaning is used as the copper-molybdenum-sulfur bulk flotation concentrate for the next step of separation flotation.

[0047] (S3) Copper-sulfur separation flotation:

[0048] The ore pulp is first adjusted to pH 9 with hydrochloric acid / natural lime, and 2500 g / t of depressant, 250 g / t of collector and 15 g / t of frother are added based on the mass of the ore pulp to perform one roughing to obtain roughing concentrate and roughing tailings.

[0049] Three scavenging operations are performed on the roughing tailings. The collector is used in an amount of 100 g / t in the first scavenging, 120 g / t in the second scavenging and 50 g / t in the third scavenging, based on the mass of the ore pulp. The scavenging concentrates of this step are all discarded and not recycled; the tailings after the third scavenging are used as the sulfur-containing tailings.

[0050] Two cleaning operations are performed on the roughing concentrate. The depressant is used in an amount of 350 g / t in the first cleaning and 150 g / t in the second cleaning, based on the mass of the ore pulp. The cleaning tailings of this step are all discarded and not recycled; the concentrate after the second cleaning is used as the copper-molybdenum concentrate.

[0051] Example 2

[0052] The example is basically the same as Example 1, except that the flotation reagents are as follows:

[0053] Depressant: guar gum, locust bean gum and fenugreek gum, in a mass ratio of 3:1:3;

[0054] Collector: ethyl thiocarbamic acid-O-(1-methylethyl) ester, diethyl phthalate and amidinothiourea, in a mass ratio of 7:5:9.

[0055] Example 3

[0056] The example is basically the same as Example 1, except that the flotation reagents are as follows:

[0057] Depressant: guar gum, locust bean gum and fenugreek gum, in a mass ratio of 2:1:2;

[0058] Collector: ethyl thiocarbamic acid-O-(1-methylethyl) ester, diethyl phthalate and amidinothiourea, in a mass ratio of 5:3:7.

[0059] Example 4

[0060] The example is basically the same as Example 1, except that the flotation reagents are as follows:

[0061] (S1) Grinding and pulp preparation:

[0062] The raw ore is ground to 65% passing 0.074 mm, and the pulp concentration is adjusted to 45% by adding water.

[0063] (S2) Copper-sulfur bulk flotation:

[0064] The pulp is first adjusted to pH 8 with hydrochloric acid / quicklime, and 1000 g / t of depressant, 50 g / t of collector and 20 g / t of frother are added based on the mass of the pulp to perform one roughing to obtain roughing concentrate and roughing tailings.

[0065] Three scavenging operations are performed on the roughing tailings. The collector is used in an amount of 50 g / t in the first scavenging, and the collector is used in an amount of 10 g / t in the second scavenging. The scavenging concentrates of this step are all discarded and not recycled.

[0066] Two cleaning operations are performed on the roughing concentrate. The depressant is used in an amount of 200 g / t in the first cleaning, and the depressant is used in an amount of 50 g / t in the second cleaning. The cleaning tailings of this step are all discarded and not recycled; the concentrate after the second cleaning is used as the copper-molybdenum-sulfur bulk flotation concentrate for the next step of separation flotation.

[0067] (S3) Copper-sulfur separation flotation:

[0068] The pulp is first adjusted to pH 8.5 with hydrochloric acid / quicklime, and 1200 g / t of depressant, 50 g / t of collector and 10 g / t of frother are added based on the mass of the pulp to perform one roughing to obtain roughing concentrate and roughing tailings.

[0069] Three scavenging operations are performed on the roughing tailings. The collector is used in an amount of 50 g / t in the first scavenging, the collector is used in an amount of 80 g / t in the second scavenging, and the collector is used in an amount of 30 g / t in the third scavenging. The scavenging concentrates of this step are all discarded and not recycled; the tailings after the third scavenging are used as the sulfur-containing tailings.

[0070] Two cleaning operations are performed on the roughing concentrate. The depressant is used in an amount of 100 g / t in the first cleaning, and the depressant is used in an amount of 50 g / t in the second cleaning. The cleaning tailings of this step are all discarded and not recycled; the concentrate after the second cleaning is used as the copper-molybdenum concentrate.

[0071] Example 5

[0072] This example is performed according to the following steps for flotation separation:

[0073] (S1) Grinding and pulp preparation:

[0074] The raw ore is ground to 65% passing 0.074 mm, and the pulp concentration is adjusted to 35% by adding water.

[0075] (S2) Copper-sulfur bulk flotation:

[0076] The pH of the ore slurry is first adjusted to 7 with hydrochloric acid / quicklime, and 1500 g / t of depressant, 125 g / t of collector and 35 g / t of frother are added based on the mass of the ore slurry, and one roughing is performed to obtain roughing concentrate and roughing tailings.

[0077] Three scavenging operations are performed on the roughing tailings, and the collector is used in an amount of 75 g / t in the first scavenging, and 20 g / t in the second scavenging. The scavenging concentrates in this step are all discarded and not recycled.

[0078] Two cleaning operations are performed on the roughing concentrate, and the depressant is used in an amount of 350 g / t in the first cleaning, and 100 g / t in the second cleaning. The cleaning tailings in this step are all discarded and not recycled; the concentrate after the second cleaning is used as the copper-molybdenum-sulfur mixed flotation concentrate for the next step of separation flotation.

[0079] (S3) Copper-sulfur separation flotation:

[0080] The pH of the ore slurry is first adjusted to 8.5 with hydrochloric acid / quicklime, and 1800 g / t of depressant, 150 g / t of collector and 12 g / t of frother are added based on the mass of the ore slurry, and one roughing is performed to obtain roughing concentrate and roughing tailings.

[0081] Three scavenging operations are performed on the roughing tailings, and the collector is used in an amount of 75 g / t in the first scavenging, 100 g / t in the second scavenging and 40 g / t in the third scavenging. The scavenging concentrates in this step are all discarded and not recycled; the tailings after the third scavenging are used as the sulfur-containing tailings.

[0082] Two cleaning operations are performed on the roughing concentrate, and the depressant is used in an amount of 225 g / t in the first cleaning, and 100 g / t in the second cleaning. The cleaning tailings in this step are all discarded and not recycled; the concentrate after the second cleaning is used as the copper-molybdenum concentrate.

[0083] Example 6

[0084] The same as Example 1, except that the flotation reagents are as follows:

[0085] Depressant: guar gum and fenugreek gum, mass ratio 1:1;

[0086] Collector: ethyl thiocarbamic acid-O-(1-methylethyl) ester and diethyl phthalate, mass ratio 7:5.

[0087] Example 7

[0088] The same as Example 1, except that the flotation reagents are as follows:

[0089] Depressant: guar gum, locust bean gum and fenugreek gum, mass ratio of 1 :4;

[0090] Depressant: guar gum, locust bean gum and fenugreek gum, mass ratio of 1 :4;

[0091] Example 8

[0092] The same as Example 1, the only difference is the flotation reagent:

[0093] Depressant: guar gum, locust bean gum and fenugreek gum, mass ratio of 1 :4;

[0094] Depressant: guar gum, locust bean gum and fenugreek gum, mass ratio of 1 :4;

[0095] Comparative Example 1

[0096] The same as Example 1, the only difference is the flotation reagent:

[0097] Depressant: guar gum, locust bean gum and fenugreek gum, mass ratio of 1 :4;

[0098] Comparative Example 2

[0099] The same as Example 1, the only difference is the flotation reagent:

[0100] Depressant: guar gum, locust bean gum and fenugreek gum, mass ratio of 1 :4;

[0101] The grade and recovery information of copper-molybdenum concentrate and sulfur-containing tailings of each example and comparative example is provided by Table 1 shown below.

[0102] Table 1

[0103]

[0104]

[0105] Although the present application has been illustrated and described with reference to specific embodiments, it is to be understood that the above examples are merely illustrative of the present application and are not to be taken as limiting thereof; it is understood that various modifications can be made to the embodiments described above, or other embodiments can be used, without departing from the spirit and scope of the present application; such modifications are intended to be included within the scope of the present application. Accordingly, the scope of the present application is to be interpreted in the broadest sense and encompasses modifications and variations of the above-described embodiments thereof.

Claims

1. A flotation reagent for copper sulphide minerals characterised in that, The flotation reagent comprises an inhibitor and a collector; The inhibitor is a combination of guar gum, locust bean gum and fenugreek gum; The mass ratio of the guar gum, the locust bean gum and the fenugreek gum is (2-6):(1-2):(2-6); The collector is a combination of ethyl thioaminoformic acid-O-(1-methylethyl) ester, diethyl phthalate and amidinothiourea; The mass ratio of the ethyl thioaminoformic acid-O-(1-methylethyl) ester, the diethyl phthalate and the amidinothiourea is (4-7):(1-5):(4-9).

2. A method for the flotation separation of copper-molybdenum-sulfur metal ores, characterized in that, The flotation separation method adopts the flotation reagent for copper-sulfur minerals as claimed in claim 1.

3. The method of the floatation separation of copper-molybdenum-sulfur metal ore according to claim 2, characterized in that, The flotation separation method comprises the following steps: (1) Copper-sulfur mixed flotation: the copper-molybdenum-sulfur metal ore slurry is subjected to one roughing, three scavenging and two cleaning, and copper-molybdenum-sulfur mixed flotation concentrate and tailings are obtained; (2) Copper-sulfur separation flotation: the copper-molybdenum-sulfur mixed flotation concentrate slurry is subjected to one second roughing, three second scavenging and two second cleaning, and copper-molybdenum concentrate and sulfur-containing tailings are obtained.

4. The method of floatation separation of copper-molybdenum-sulfur metal ores according to claim 2, characterized in that, The flotation reagent of the flotation separation method further comprises a frother; The frother comprises pinol oil.

5. The method of claim 3, wherein the copper-molybdenum-sulfur metal ore is separated by flotation, characterized by, In step (1), the concentration of the copper-molybdenum-sulfur metal ore slurry is 30%-40%, and the pH of the slurry is adjusted to 6-8.

6. The method of claim 3, wherein the copper-molybdenum-sulfur metal ore is separated by flotation, characterized by, In step (1), the amount of the flotation reagent, based on the mass of the slurry, comprises at least one of the following (a)-(c): (a) in the roughing, the amount of the inhibitor is 1000-2000 g / t, the amount of the collector is 50-200 g / t, and the amount of the frother is 20-50 g / t; (b) in the first scavenging, the amount of the collector is 50-100 g / t, and in the second scavenging, the amount of the collector is 10-30 g / t; (c) in the first cleaning, the amount of the inhibitor is 200-500 g / t, and in the second cleaning, the amount of the inhibitor is 50-150 g / t.

7. The method of claim 3, wherein the copper-molybdenum-sulfur metal ore is separated by flotation, characterized by, In step (2), the concentration of the copper-molybdenum-sulfur mixed flotation concentrate slurry is 20%-30%, and the pH of the slurry is adjusted to 8-9.

8. The method of claim 3, wherein the copper-molybdenum-sulfur metal ore is separated by flotation, characterized by, In step (2), the amount of the flotation reagent, based on the mass of the slurry, comprises at least one of the following (A)-(C): (A) in the second roughing, the amount of the inhibitor is 1200-2500 g / t, the amount of the collector is 50-250 g / t, and the amount of the frother is 10-15 g / t; (B) in the first second cleaning, the amount of the inhibitor is 100-350 g / t, and in the second second cleaning, the amount of the inhibitor is 50-150 g / t; (C) in the first second scavenging, the amount of the collector is 50-100 g / t, in the second second scavenging, the amount of the collector is 80-120 g / t, and in the third second scavenging, the amount of the collector is 30-50 g / t.

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