A method for chalcopyrite and enargite flotation separation and enrichment

Abstract

The application discloses a method for chalcopyrite and enargite flotation separation and enrichment, and belongs to the technical field of ore dressing. The method realizes selective flotation separation of chalcopyrite and enargite through the combined action of hydrogen peroxide oxidation modification-sodium sulfite desorption collector, and obtains high-arsenic copper concentrate. Then, the method realizes effective enrichment of chalcopyrite through the desorption activation-high-efficiency collector strong collection technology, and obtains low-arsenic copper concentrate. The method is simple, easy for industrial production, and has good copper and arsenic separation and enrichment effects. The copper grade of the low-arsenic copper concentrate is greater than 23%, the arsenic content is less than 0.5%, the arsenic content of the high-arsenic copper concentrate is greater than 8%, and the total copper recovery rate is greater than 90%.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mineral processing, and particularly relates to a method for flotation separation and enrichment of chalcopyrite and tennantite. BACKGROUND

[0002] Arsenic-containing copper sulfide ore is one of the important raw materials for obtaining copper concentrate. Flotation is the most commonly used technology for separating such ores, however, it is difficult to separate chalcopyrite and tennantite by flotation, because these two minerals have good natural floatability, and the selectivity of mineral processing reagents to the minerals is poor. On the other hand, the surfaces of the minerals are rich in Cu and S active sites, and the floatability is very close, so that the conventional mineral processing reagent system and method will cause chalcopyrite and tennantite to be enriched synchronously, ultimately resulting in excessive arsenic in the copper concentrate. The high arsenic content in the flotation concentrate not only causes great pollution to the environment during smelting, but also greatly increases the processing cost. Therefore, the development of a technology for flotation separation and enrichment of chalcopyrite and tennantite has important practical significance for improving product quality and improving smelting environment.

[0003] Research on the flotation separation method of copper and arsenic has been reported. The invention patent with application number 201010229759.9 discloses a "mineral processing collector for arsenic-containing copper ore and treatment method". Isopropyl ethyl thiourea and kerosene are used as the collector, and through steps such as grinding, copper roughing, copper cleaning, arsenic roughing, arsenic cleaning and arsenic scavenging, low-arsenic copper concentrate and high-arsenic copper concentrate are obtained respectively. Since this method does not consider the inhibition of arsenic-containing copper minerals, there is a deficiency that arsenic-containing copper minerals are easy to enter the copper concentrate in copper roughing and copper cleaning. The invention patents with application numbers 201811472623.3 and 201610273822.6 respectively disclose "a composite inhibitor for copper-arsenic mineral separation flotation" and "a composite mineral processing inhibitor for copper-arsenic separation flotation". The former selectively inhibits arsenic-containing copper minerals such as tennantite and tenorite through a specific combination of Na2S2O8, sodium humate and Na5P3O 10 The latter selectively inhibits arsenic-containing copper minerals such as tennantite and tenorite through a specific combination of calcium hypochlorite, sodium humate and sodium hexametaphosphate, and is implemented on low-arsenic copper ore respectively, but the adaptability to high-arsenic copper ore remains to be verified. The invention patent with application number 201410352506.9 discloses a "method for selecting copper concentrate from copper ore with high sulfur and arsenic content", which first inhibits pyrite, preferentially floats copper minerals in steps, and then uses regrinding drug removal-oxidation method, adjusts the pulp with lime and calcium hypochlorite, and preferentially oxidizes the arsenic-free copper sulfide minerals with potassium permanganate, and then selectively removes tennantite in the copper concentrate. This method has problems of large amount of oxidizing agent (calcium hypochlorite, potassium permanganate) addition and easy inhibition of arsenic-containing copper sulfide minerals. Based on the above status, the separation process and technology of arsenic-containing copper sulfide ore need to be improved. SUMMARY

[0004] To solve the above technical problems, the application provides a method for flotation separation and enrichment of chalcopyrite and enargite.

[0005] To achieve the above object, the application provides the following technical scheme:

[0006] The application provides a method for flotation separation and enrichment of chalcopyrite and enargite, wherein lime and hydrogen peroxide are added in the process of grinding the raw ore, and then a collector, an inhibitor and a foaming agent are added, and a process of two roughing and two cleaning is adopted to float arsenic while inhibiting copper, so as to obtain high-arsenic copper concentrate and copper-containing tailings; an activator, a high-efficiency collector and a foaming agent are added in the copper-containing tailings, and a process of one roughing, one scavenging and three cleaning is adopted to select copper, so as to obtain low-arsenic copper concentrate and tailings.

[0007] Further, the method for flotation separation and enrichment of chalcopyrite and enargite comprises the following steps:

[0008] (1) lime and hydrogen peroxide (H2O2) are added in a ball mill to grind the raw ore to obtain ground ore, and a collector, an inhibitor of chalcopyrite and a foaming agent are sequentially added in the ground ore to perform roughing I of floating arsenic while inhibiting copper, so as to obtain roughing I concentrate and roughing I tailings;

[0009] (2) hydrogen peroxide, a collector, an inhibitor of chalcopyrite and a foaming agent are sequentially added in the roughing I tailings to perform roughing II of floating arsenic while inhibiting copper, so as to obtain roughing II concentrate and roughing II tailings;

[0010] (3) the roughing I concentrate and the roughing II concentrate are combined to perform arsenic cleaning I, so as to obtain arsenic cleaning I concentrate and arsenic cleaning I tailings, wherein the arsenic cleaning I tailings are returned to the roughing I operation of floating arsenic while inhibiting copper;

[0011] (4) the arsenic cleaning I concentrate is subjected to arsenic cleaning II, so as to obtain high-arsenic copper concentrate and arsenic cleaning II tailings, wherein the arsenic cleaning II tailings are returned to the arsenic cleaning I operation;

[0012] (5) an activator, a high-efficiency collector and a foaming agent are sequentially added in the roughing II tailings to perform copper roughing, so as to obtain copper roughing concentrate and copper roughing tailings;

[0013] (6) an activator, a high-efficiency collector and a foaming agent are sequentially added in the copper roughing tailings to perform copper scavenging, so as to obtain copper scavenging concentrate and copper scavenging tailings;

[0014] (7) performing copper cleaning I on the copper roughing concentrate to obtain a copper cleaning I concentrate and a copper cleaning I tailing, wherein the copper cleaning I tailing and the copper scavenging concentrate are combined and returned to the copper roughing operation;

[0015] (8) performing copper cleaning II on the copper cleaning I concentrate to obtain a copper cleaning II concentrate and a copper cleaning II tailing, wherein the copper cleaning II tailing is returned to the copper cleaning I operation;

[0016] (9) performing copper cleaning III on the copper cleaning II concentrate to obtain a low-arsenic copper concentrate and a copper cleaning III tailing, wherein the copper cleaning III tailing is returned to the copper cleaning II operation.

[0017] In step (1), the non-arsenic-containing copper sulfide mineral in the raw ore is mainly chalcopyrite, and the arsenic-containing mineral is mainly enargite; and / or

[0018] The collector is butyl xanthate; and / or

[0019] The chalcopyrite inhibitor is sodium sulfite; and / or

[0020] The frother is pinol oil; and / or

[0021] The grinding is performed in a ball mill, and the grinding is performed to a fineness of 85-95 wt% of -0.074 mm (i.e. less than 0.074 mm) of the ball mill discharge.

[0022] In step (1), the addition amount of the lime is 800-1200 g / t based on the raw ore; the addition amount of the hydrogen peroxide is 800-1000 g / t, the addition amount of the collector is 20-40 g / t, the addition amount of the chalcopyrite inhibitor is 600-800 g / t, and the addition amount of the frother is 10-20 g / t.

[0023] Based on the difference in the ease of oxidation of copper and arsenic minerals, the present application uses hydrogen peroxide to preferentially oxidize the surface of chalcopyrite, increases the difference in the chemical properties of the mineral surface, and strengthens the mineral flotation separation. The surface of chalcopyrite is rich in iron ions, which can accelerate the electron transfer in the H2O2 decomposition reaction process, promote the generation of active species ·OH, and realize the passivation modification of the surface of chalcopyrite through the strong oxidation of ·OH. Since the surface of enargite does not contain iron ions, the oxidation of H2O2 on the surface of enargite is relatively weak, and the influence on the surface of enargite is small. At the same time, lime can effectively inhibit pyrite, creating good conditions for copper inhibition and arsenic flotation.

[0024] In step (2), the collector is butyl xanthate; and / or

[0025] The chalcopyrite inhibitor is sodium sulfite; and / or

[0026] The foaming agent is pine oil.

[0027] In step (2), the adding amount of the hydrogen peroxide is 400-500 g / t, the adding amount of the collector is 10-20 g / t, the adding amount of the chalcopyrite inhibitor is 300-400 g / t, and the adding amount of the foaming agent is 5-10 g / t, all based on the raw ore.

[0028] The present application promotes the hydrophobicity attenuation of the chalcopyrite surface by the desorption of the collector by sodium sulfite. Since the chalcopyrite has a high equilibrium potential, the sodium sulfite can more easily promote the desorption of the xanthate component on the chalcopyrite surface. Meanwhile, the sodium sulfite and the chalcopyrite surface interact with each other, resulting in the chalcopyrite surface being covered by hydrophilic species (such as sulfate, hydroxyl compound, oxide, etc.), which further improves the hydrophilicity of the chalcopyrite surface.

[0029] In step (5), the activator is a mixture of ethylenediaminetetraacetic acid and ammonium carbamate, and the mass ratio is 1:(1-3); and / or

[0030] The high-efficiency collector is ammonium dibutyl phosphate salt; and / or

[0031] The foaming agent is pine oil.

[0032] The mixture of ethylenediaminetetraacetic acid and ammonium carbamate used in the present application can effectively activate the chalcopyrite. The ethylenediaminetetraacetic acid can effectively complex the hydrophilic species (such as hydroxyl calcium, sulfate, hydroxyl compound, copper oxide, etc.) on the chalcopyrite surface, and achieve the desorption activation of the passivated chalcopyrite surface. The ammonium carbamate generates copper-ammonia complex cations by complexation reaction with the copper active sites on the chalcopyrite surface, and promotes the adsorption of the collector.

[0033] The ammonium dibutyl phosphate salt used in the present application can selectively collect the chalcopyrite. The ammonium dibutyl phosphate salt and the copper active sites on the chalcopyrite surface are coordinated by P-O-Cu and P=O-Cu to form a stable four-membered chelate ring, which can strongly collect the chalcopyrite, while the collecting ability of the ammonium dibutyl phosphate salt on the pyrite is weak.

[0034] In step (5), the adding amount of the activator is 400-800 g / t, the adding amount of the high-efficiency collector is 10-30 g / t, and the adding amount of the foaming agent is 10-20 g / t, all based on the raw ore.

[0035] In step (6), the activator is a mixture of ethylenediaminetetraacetic acid and ammonium carbamate, and the mass ratio is 1:(1-3); and / or

[0036] The high-efficiency collector is ammonium dibutyl phosphate salt; and / or

[0037] The foaming agent is pinol oil.

[0038] In step (6), the adding amount of the activator is 200-400 g / t, the adding amount of the high-efficiency collector is 5-15 g / t, and the adding amount of the foaming agent is 5-10 g / t, all based on the raw ore.

[0039] Compared with the prior art, the present application has the following advantages and technical effects:

[0040] (1) The present application is based on the difference in the surface oxidation difficulty of copper and arsenic minerals, and hydrogen peroxide is used to preferentially oxidize the surface of chalcopyrite, so as to increase the difference in the chemical properties of the mineral surface and strengthen the mineral flotation separation. The surface of chalcopyrite is rich in iron ions, which can accelerate the electron transfer in the H2O2 decomposition reaction process, promote the generation of active species ·OH, and realize the passivation modification of the surface of chalcopyrite through the strong oxidation of ·OH. Since the surface of enargite does not contain iron ions, the oxidation of H2O2 on the surface of enargite is relatively weak, and the influence on the surface of enargite is small. At the same time, lime can effectively inhibit pyrite, which creates good conditions for inhibiting copper and floating arsenic.

[0041] (2) The present application promotes the attenuation of the hydrophobicity of the surface of chalcopyrite through the desorption of the collector by sodium sulfite. Since chalcopyrite has a high equilibrium potential, sodium sulfite is more likely to promote the desorption of xanthate components on the surface of chalcopyrite. At the same time, sodium sulfite interacts with the surface of chalcopyrite in a complex manner, resulting in the surface of chalcopyrite being covered with hydrophilic species (such as sulfates, hydroxyl compounds, oxides, etc.), which further improves the hydrophilicity of the surface of chalcopyrite.

[0042] (3) The present application realizes the selective flotation separation of chalcopyrite and enargite through the combined action of "hydrogen peroxide oxidation modification-sodium sulfite desorption of collector", which significantly improves the copper grade and the recovery rate of total copper compared with the traditional research on the surface modification and depressor of chalcopyrite and enargite.

[0043] (4) The mixture of ethylenediaminetetraacetic acid and ammonium carbamate used in the present application can effectively activate chalcopyrite. Ethylenediaminetetraacetic acid can effectively complex the hydrophilic species (such as hydroxyl calcium, sulfate, hydroxyl compound, copper oxide, etc.) on the surface of chalcopyrite, realize the desorption and activation of the passivated chalcopyrite surface. Ammonium carbamate generates copper ammonia complex cations through complexation with copper active sites on the surface of chalcopyrite, which promotes the adsorption of the collector.

[0044] (5) The ammonium salt of dibutyl phosphate used in the present application can realize the selective collection of chalcopyrite. The ammonium salt of dibutyl phosphate and the copper active sites on the surface of chalcopyrite form a stable four-membered chelate ring through P-O-Cu and P=O-Cu coordination, which can strongly collect chalcopyrite, while its collection ability for pyrite is weak.

[0045] (6) The application has simple application method, easy industrial production, and good copper and arsenic separation and enrichment effect, wherein the copper grade of the low-arsenic copper concentrate is greater than 23%, the arsenic content is less than 0.5%, the arsenic content in the high-arsenic copper concentrate is greater than 8%, and the total copper recovery rate is greater than 90%. BRIEF DESCRIPTION OF DRAWINGS

[0046] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the application, and serve as an explanation of the illustrative embodiments of the present application, and are not intended to limit the present application. In the drawings:

[0047] Figure 1 Process flow chart of the chalcopyrite and enargite flotation separation and enrichment method of the present application. DETAILED DESCRIPTION

[0048] The various illustrative embodiments of the present application will now be described in detail below. This detailed description is merely intended to teach a person skilled in the art further aspects and features of the present application, and is not intended to limit the present application. Accordingly, no limitation is intended to the details of construction or design illustrated in the detailed description, but instead other embodiments employing the principles of the present application are clearly contemplated.

[0049] It should be understood that the terms used in the present application are merely for the description of specific embodiments, and are not intended to limit the present application. In addition, for the numerical range in the present application, it should be understood that each intermediate value between the upper limit and the lower limit of the range is also specifically disclosed. Each smaller range between any stated value or stated range and any other stated value or stated range is also included in the present application. The upper limit and the lower limit of these smaller ranges can be independently included or excluded from the range.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present application, the preferred methods and materials are described. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials in connection with which the documents are cited. In case of conflict between the content of the specification and that of any document incorporated by reference, the content of the specification prevails.

[0051] Various modifications and changes can be made to the specific implementation of the present application described in the specification without departing from the scope or spirit of the application. Other implementations of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are exemplary only.

[0052] As used herein, the terms "comprise", "comprising", "include", "including", "have", "having" and the like are open-ended terms that are intended to mean including, but not limited to.

[0053] The reagents used in the embodiments of the present application are all commercially available.

[0054] The embodiments of the present application provide a method for flotation separation and enrichment of chalcopyrite and enargite, a process flow chart of which is shown in Figure 1 The method comprises the following steps:

[0055] (1) adding lime and hydrogen peroxide to a ball mill for grinding the raw ore, and sequentially adding a collector, a chalcopyrite depressant and a frother to the ground ore to perform a copper depression and arsenic flotation roughing I (i.e., arsenic roughing I), so as to obtain a roughing I concentrate and a roughing I tailings, the non-arsenic-containing copper sulfide minerals in the raw ore mainly being chalcopyrite, and the arsenic-containing minerals mainly being enargite; the lime addition amount in the ball mill is 800-1200 g / t (calculated based on the raw ore, the same below); the hydrogen peroxide addition amount is 800-1000 g / t, and the ground ore is discharged from the ball mill at a fineness of 85-95% passing 0.074 mm; the collector is butyl xanthate, and the addition amount is 20-40 g / t; the chalcopyrite depressant is sodium sulfite, and the addition amount is 600-800 g / t; and the frother is pine oil, and the addition amount is 10-20 g / t;

[0056] (2) sequentially adding hydrogen peroxide, a collector, a chalcopyrite depressant and a frother to the roughing I tailings obtained in step (1) to perform a copper depression and arsenic flotation roughing II (i.e., arsenic roughing II), so as to obtain a roughing II concentrate and a roughing II tailings, the hydrogen peroxide addition amount being 400-500 g / t; the collector being butyl xanthate, and the addition amount being 10-20 g / t; the chalcopyrite depressant being sodium sulfite, and the addition amount being 300-400 g / t; and the frother being pine oil, and the addition amount being 5-10 g / t;

[0057] (3) combining the roughing I concentrate and the roughing II concentrate obtained in steps (1) and (2) to perform arsenic cleaning I, so as to obtain an arsenic cleaning I concentrate and an arsenic cleaning I tailings, wherein the arsenic cleaning I tailings are returned to the copper depression and arsenic flotation roughing I operation;

[0058] (4) performing arsenic cleaning II on the arsenic cleaning I concentrate obtained in step (3) to obtain a high-arsenic copper concentrate and an arsenic cleaning II tailings, wherein the arsenic cleaning II tailings are returned to the arsenic cleaning I operation;

[0059] (5) sequentially adding an activator, a high-efficiency collector and a frother to the roughing II tailings obtained in step (2) to perform copper roughing, so as to obtain a copper roughing concentrate and a copper roughing tailings, the activator being a mixture of ethylenediaminetetraacetic acid and ammonium carbamate at a mass ratio of 1:(1-3), and the addition amount being 400-800 g / t; the high-efficiency collector being ammonium dibutyl phosphate, and the addition amount being 10-30 g / t; and the frother being pine oil, and the addition amount being 10-20 g / t;

[0060] (6) adding an activator, a high-efficiency collector and a foaming agent into the copper roughing tailings obtained in step (5) in sequence to perform copper scavenging, and obtaining copper scavenging concentrate and copper scavenging tailings, the activator being a mixture of ethylenediaminetetraacetic acid and ammonium carbamate with a mass ratio of 1:(1-3) and an adding amount of 200-400 g / t, the high-efficiency collector being ammonium dibutyl phosphate with an adding amount of 5-15 g / t, and the foaming agent being pine oil with an adding amount of 5-10 g / t;

[0061] (7) performing copper cleaning I on the copper roughing concentrate obtained in step (5) to obtain copper cleaning I concentrate and copper cleaning I tailings, wherein the copper cleaning I tailings and the copper scavenging concentrate obtained in step (6) are combined and returned to the copper roughing operation;

[0062] (8) performing copper cleaning II on the copper cleaning I concentrate obtained in step (7) to obtain copper cleaning II concentrate and copper cleaning II tailings, wherein the copper cleaning II tailings are returned to the copper cleaning I operation;

[0063] (9) performing copper cleaning III on the copper cleaning II concentrate obtained in step (8) to obtain low-arsenic copper concentrate and copper cleaning III tailings, wherein the copper cleaning III tailings are returned to the copper cleaning II operation.

[0064] The present application first realizes selective flotation separation of chalcopyrite and arsenic copper sulfide through the combined action of "hydrogen peroxide oxidation modification-sodium sulfite desorption collector", and obtains high-arsenic copper concentrate; then, through the "depression activation-high-efficiency collector strong collection" technology, the mixture of ethylenediaminetetraacetic acid and ammonium carbamate is used to activate chalcopyrite, and ammonium dibutyl phosphate is used as high-efficiency collector to realize effective enrichment of chalcopyrite, and low-arsenic copper concentrate is obtained. The method is simple and easy for industrial production, and has good copper and arsenic separation and enrichment effect, wherein the copper grade of the low-arsenic copper concentrate is greater than 23%, the arsenic content is less than 0.5%, the arsenic content in the high-arsenic copper concentrate is greater than 8%, and the total copper recovery rate is greater than 90% (i.e. the sum of the copper recovery rates in the low-arsenic copper concentrate and the high-arsenic copper concentrate).

[0065] It should be noted that the parts not described in detail in the present application are conventional operation means in the art, and are not the focus of the present application, for example, the specific method of grinding is completed by using a conventional method.

[0066] The technical solutions of the present application are further illustrated by the following examples.

[0067] Example 1

[0068] The Cu grade of a certain copper ore in Tibet is 0.54%, the As content is 0.18%, and the S content is 8.65%. The non-arsenic-containing copper sulfide minerals in the ore are mainly chalcopyrite, and the arsenic-containing minerals are mainly enargite.

[0069] The method for flotation separation and enrichment of chalcopyrite and enargite provided by the embodiment is as follows:

[0070] (1) Add lime 800 g / t (based on the ore material, the same below) and hydrogen peroxide 800 g / t in a ball mill, and grind the ore. The fineness of the ball mill discharge is 85wt% of -0.074 mm. Add butyl xanthate 20 g / t, sodium sulfite 600 g / t and pine oil 10 g / t in the grinding material in sequence with an interval of 3 min. Stir for 3 min, then aerate to carry out the copper-inhibiting and arsenic-flotation roughing I to obtain the roughing I concentrate and the roughing I tailings;

[0071] (2) Add hydrogen peroxide 400 g / t, butyl xanthate 10 g / t, sodium sulfite 300 g / t and pine oil 5 g / t in the roughing I tailings obtained in step (1) in sequence with an interval of 3 min. Stir for 3 min, then carry out the copper-inhibiting and arsenic-flotation roughing II to obtain the roughing II concentrate and the roughing II tailings;

[0072] (3) Combine the roughing I concentrate and the roughing II concentrate obtained in steps (1) and (2) to carry out the arsenic cleaning I to obtain the arsenic cleaning I concentrate and the arsenic cleaning I tailings, wherein the arsenic cleaning I tailings are returned to the copper-inhibiting and arsenic-flotation roughing I operation;

[0073] (4) Carry out the arsenic cleaning II on the arsenic cleaning I concentrate obtained in step (3) to obtain the high-arsenic copper concentrate and the arsenic cleaning II tailings, wherein the arsenic cleaning II tailings are returned to the arsenic cleaning I operation;

[0074] (5) Add the activator (mass ratio of ethylenediaminetetraacetic acid to ammonium carbamate is 1:1) 600 g / t, ammonium dibutyl phosphate salt 10 g / t and pine oil 10 g / t in the roughing II tailings obtained in step (2) in sequence with an interval of 3 min. Stir for 3 min, then carry out the copper roughing to obtain the copper roughing concentrate and the copper roughing tailings;

[0075] (6) Add the activator (mass ratio of ethylenediaminetetraacetic acid to ammonium carbamate is 1:1) 300 g / t, ammonium dibutyl phosphate salt 5 g / t and pine oil 5 g / t in the copper roughing tailings obtained in step (5) in sequence with an interval of 3 min. Stir for 3 min to carry out the copper scavenging to obtain the copper scavenging concentrate and the copper scavenging tailings;

[0076] (7) Carry out the copper cleaning I on the copper roughing concentrate obtained in step (5) to obtain the copper cleaning I concentrate and the copper cleaning I tailings, wherein the copper cleaning I tailings and the copper scavenging concentrate obtained in step (6) are combined and returned to the copper roughing operation;

[0077] (8) Carry out the copper cleaning II on the copper cleaning I concentrate obtained in step (7) to obtain the copper cleaning II concentrate and the copper cleaning II tailings, wherein the copper cleaning II tailings are returned to the copper cleaning I operation.

[0078] (9) The copper concentrate II obtained in step (8) is subjected to copper concentration III to obtain a low-arsenic copper concentrate and a copper concentration III tailing, wherein the copper concentration III tailing is returned to the copper concentration II operation.

[0079] The final low-arsenic copper concentrate has a copper grade of 23.13% and an arsenic content of 0.32%, and a copper recovery rate of 70.53%; the high-arsenic copper concentrate has a copper grade of 11.58% and an arsenic content of 8.05%, and a copper recovery rate of 21.13%.

[0080] Comparative Example 1

[0081] The traditional reagent system and method are used for the separation of the raw ore, i.e., equal mass of calcium hypochlorite is used to replace hydrogen peroxide, sodium sulfite is added before butyl xanthate, the addition amount is unchanged, and equal mass of butyl xanthate is used to replace ammonium dibutyl phosphate in the copper roughing and copper scavenging operations.

[0082] The final low-arsenic copper concentrate has a copper grade of 21.11% and an arsenic content of 0.78%, and a copper recovery rate of 65.23%; the high-arsenic copper concentrate has a copper grade of 9.32% and an arsenic content of 7.05%, and a copper recovery rate of 17.64%.

[0083] As can be seen from Example 1 and Comparative Example 1, the separation indexes of the ore are obviously decreased by changing the type of oxidizing agent, the addition sequence of sodium sulfite, and the type of collector. Among them, the copper grade of the low-arsenic copper concentrate is reduced by about 2%, the copper recovery rate is reduced by about 5%, the arsenic content is significantly increased from 0.32% to 0.78%, and the indexes of the high-arsenic copper concentrate are also decreased. Compared with hydrogen peroxide, the combined action of hypochlorite and calcium ions in calcium hypochlorite is more likely to cause the depression of sulfide-arsenical copper ore, thereby increasing the arsenic content in the low-arsenic copper concentrate and reducing the recovery rate of the high-arsenic copper concentrate. When sodium sulfite is added before the collector, the hydrophilicity of the surface of the sulfide-arsenical copper ore is easily caused, which is not conducive to the depression of copper and the flotation of arsenic. When sodium sulfite is added after the collector, since chalcopyrite has a high equilibrium potential, sodium sulfite is more likely to promote the desorption of xanthate components on the surface of chalcopyrite, thereby increasing the hydrophilicity of the surface of chalcopyrite. Compared with butyl xanthate, ammonium dibutyl phosphate can form a stable four-membered chelate ring with the copper active sites on the surface of chalcopyrite through P-O-Cu and P=O-Cu coordination, and can strongly collect chalcopyrite.

[0084] Comparative Example 2

[0085] The other conditions are the same as those in Example 1, except that no hydrogen peroxide is added in the ore grinding operation and the roughing II operation for the depression of copper and the flotation of arsenic, so as to analyze the effect of hydrogen peroxide.

[0086] The final low-arsenic copper concentrate has a copper grade of 21.13%, an arsenic content of 0.68%, and a copper recovery rate of 67.13%; the final high-arsenic copper concentrate has a copper grade of 10.38%, an arsenic content of 8.55%, and a copper recovery rate of 16.84%.

[0087] As can be seen from Example 1 and Comparative Example 2, the copper recovery rate of the low-arsenic copper concentrate decreases significantly, and the arsenic content increases, because hydrogen peroxide can easily oxidize chalcopyrite and thus inhibit chalcopyrite. Without the addition of hydrogen peroxide, chalcopyrite can easily enter the high-arsenic copper concentrate in the copper-inhibition and arsenic-flotation process, resulting in a significant decrease in the copper recovery rate of the low-arsenic copper concentrate. Meanwhile, the tennasite can also easily enter the low-arsenic copper concentrate.

[0088] Comparative Example 3

[0089] The other conditions are the same as in Example 1, except that no sodium sulfite is added in the copper-inhibition and arsenic-flotation roughing I and roughing II processes, so as to analyze the effect of sodium sulfite.

[0090] The final low-arsenic copper concentrate has a copper grade of 22.06%, an arsenic content of 0.62%, and a copper recovery rate of 63.53%; the final high-arsenic copper concentrate has a copper grade of 11.38%, an arsenic content of 7.82%, and a copper recovery rate of 17.86%.

[0091] As can be seen from Example 1 and Comparative Example 3, the copper recovery rate of the low-arsenic copper concentrate decreases significantly, because sodium sulfite can promote the desorption of xanthate components on the surface of chalcopyrite; and cause the surface of chalcopyrite to be covered by hydrophilic species (such as sulfate, hydroxyl compounds, oxides, etc.), thereby increasing the hydrophilicity of the surface of chalcopyrite. Without the addition of sodium sulfite, chalcopyrite can easily enter the high-arsenic copper concentrate in the copper-inhibition and arsenic-flotation process, resulting in a significant decrease in the copper recovery rate of the low-arsenic copper concentrate.

[0092] A certain copper ore has a Cu grade of 0.75%, an As content of 0.48%, and an S content of 10.23%. The non-arsenic-containing copper sulfide minerals in the ore mainly include chalcopyrite, and the arsenic-containing minerals mainly include tennasite.

[0093] The method for the flotation separation and enrichment of chalcopyrite and tennasite provided in this example is as follows:

[0094] (1) The ore is ground in a ball mill with the addition of 1000 g / t of lime (calculated based on the ore material, the same below) and 900 g / t of hydrogen peroxide. The fineness of the material discharged from the ball mill is 90 wt% of -0.074 mm. Butyl xanthate 30 g / t, sodium sulfite 700 g / t, and pine oil 15 g / t are sequentially added to the ground material with an interval of 4 min. After stirring for 4 min, roughing I for copper-inhibition and arsenic-flotation is performed with aeration to obtain roughing I concentrate and roughing I tailings;

[0095] (2) In the rough selection I tailings obtained in step (1), hydrogen peroxide 450 g / t, butyl xanthate 15 g / t, sodium sulfite 350 g / t and pine oil 7.5 g / t are sequentially added, the dosing interval is 4 min, and after stirring for 4 min, the rough selection II of copper depression and arsenic flotation is carried out, to obtain the rough selection II concentrate and the rough selection II tailings;

[0096] (3) The rough selection I concentrate and the rough selection II concentrate obtained in steps (1) and (2) are combined and subjected to arsenic concentration I, to obtain the arsenic concentration I concentrate and the arsenic concentration I tailings, wherein the arsenic concentration I tailings are returned to the rough selection I of copper depression and arsenic flotation;

[0097] (4) The arsenic concentration I concentrate obtained in step (3) is subjected to arsenic concentration II, to obtain the high-arsenic copper concentrate and the arsenic concentration II tailings, wherein the arsenic concentration II tailings are returned to the arsenic concentration I operation;

[0098] (5) In the rough selection II tailings obtained in step (2), an activator (mass ratio of ethylenediaminetetraacetic acid to ammonium carbamate is 1:2) 700 g / t, ammonium dibutyl phosphate salt 20 g / t and pine oil 15 g / t are sequentially added, the dosing interval is 4 min, and after stirring for 4 min, the copper rough selection is carried out, to obtain the copper rough selection concentrate and the copper rough selection tailings;

[0099] (6) In the copper rough selection tailings obtained in step (5), an activator (mass ratio of ethylenediaminetetraacetic acid to ammonium carbamate is 1:2) 350 g / t, ammonium dibutyl phosphate salt 10 g / t and pine oil 7.5 g / t are sequentially added, the dosing interval is 4 min, and after stirring for 4 min, the copper scavenging is carried out, to obtain the copper scavenging concentrate and the copper scavenging tailings;

[0100] (7) The copper rough selection concentrate obtained in step (5) is subjected to copper concentration I, to obtain the copper concentration I concentrate and the copper concentration I tailings, wherein the copper concentration I tailings and the copper scavenging concentrate obtained in step (6) are combined and returned to the copper rough selection operation;

[0101] (8) The copper concentration I concentrate obtained in step (7) is subjected to copper concentration II, to obtain the copper concentration II concentrate and the copper concentration II tailings, wherein the copper concentration II tailings are returned to the copper concentration I operation;

[0102] (9) The copper concentration II concentrate obtained in step (8) is subjected to copper concentration III, to obtain the low-arsenic copper concentrate and the copper concentration III tailings, wherein the copper concentration III tailings are returned to the copper concentration II operation.

[0103] The final low-arsenic copper concentrate has a copper grade of 27.65%, an arsenic content of 0.42%, and a copper recovery rate of 76.32%; the high-arsenic copper concentrate has a copper grade of 10.28%, an arsenic content of 11.48%, and a copper recovery rate of 17.45%.

[0104] Comparative Example 4

[0105] The traditional medicament system and method are used for the separation of the raw ore, i.e. equal mass of potassium permanganate is used to replace hydrogen peroxide, equal mass of sodium thiosulfate is used to replace sodium sulfite and is added before butyl xanthate, equal mass of butyl xanthate is used to replace ammonium dibutyl phosphate in the rough copper flotation and scavenging operations.

[0106] Finally, the separation indexes of the low-arsenic copper concentrate are that the copper grade is 24.25%, the arsenic content is 0.82%, and the copper recovery rate is 72.62%; and the separation indexes of the high-arsenic copper concentrate are that the copper grade is 9.82%, the arsenic content is 10.32%, and the copper recovery rate is 15.24%.

[0107] As can be seen from Example 2 and Comparative Example 4, when the type of oxidant, the type of depressor and the adding sequence, and the type of collector are changed, the separation indexes of the ore decrease obviously. Among them, the copper grade of the low-arsenic copper concentrate decreases by about 3%, the copper recovery rate decreases by about 4%, the arsenic content increases from 0.42% to 0.82% obviously, and the indexes of the high-arsenic copper concentrate also decrease. Potassium permanganate has strong oxidizing property, which easily causes the depression of the sulfide minerals, thereby increasing the arsenic content in the low-arsenic copper concentrate and decreasing the recovery rate of the high-arsenic copper concentrate. Sodium thiosulfate is easily adsorbed on the surface of the sulfide minerals, which is not conducive to the depression of copper and the flotation of arsenic. Compared with butyl xanthate, ammonium dibutyl phosphate can form a stable four-membered chelate ring with the copper active sites on the surface of chalcopyrite through P-O-Cu and P=O-Cu coordination, and can strongly collect chalcopyrite.

[0108] Comparative Example 5

[0109] The other conditions are consistent with those in Example 2, except that no activator (ethylenediaminetetraacetic acid and ammonium carbamate) is added in the rough copper flotation and scavenging operations, so as to analyze the influence of the activator.

[0110] Finally, the separation indexes of the low-arsenic copper concentrate are that the copper grade is 23.13%, the arsenic content is 0.48%, and the copper recovery rate is 66.53%; and the separation indexes of the high-arsenic copper concentrate are that the copper grade is 10.08%, the arsenic content is 11.82%, and the copper recovery rate is 17.84%.

[0111] As can be seen from Example 2 and Comparative Example 5, when no activator is added, the copper grade of the low-arsenic copper concentrate decreases by about 4%, and the copper recovery rate decreases by about 10 percentage points. The reason is that the mixture of ethylenediaminetetraacetic acid and ammonium carbamate used in the present application can effectively activate chalcopyrite. Ethylenediaminetetraacetic acid can effectively complex the hydrophilic species (such as calcium hydroxide, sulfate, hydroxyl compound, copper oxide, etc.) on the surface of chalcopyrite, so as to realize the deactivation of the passivated chalcopyrite surface. Ammonium carbamate can generate copper-ammonia complex cations through the complexation reaction with the copper active sites on the surface of chalcopyrite, so as to promote the adsorption of the collector.

[0112] Comparative Example 6

[0113] The other conditions are consistent with those of Example 2, except that ethyldithiophosphate is used instead of ammonium salt of dibutyl phosphate in the rough separation and scavenging of copper.

[0114] Finally, the low-arsenic copper concentrate has a copper grade of 25.34% and an arsenic content of 0.46%, and the copper recovery rate is 72.13%; the high-arsenic copper concentrate has a copper grade of 10.62% and an arsenic content of 11.02%, and the copper recovery rate is 18.04%.

[0115] As can be seen from Example 2 and Comparative Example 6, after ethyldithiophosphate is used instead of ammonium salt of dibutyl phosphate, the copper grade of the low-arsenic copper concentrate decreases by about 2%, and the copper recovery rate decreases by about 4 percentage points. The reason is that the ammonium salt of dibutyl phosphate used in the present application has stronger chelation performance on the surface of chalcopyrite, and can strongly collect chalcopyrite.

[0116] Example 3

[0117] The copper ore used in this example has a Cu grade of 1.1%, an As content of 0.65%, and an S content of 14.58%. The non-arsenic-containing copper sulfide minerals in the ore are mainly chalcopyrite, and the arsenic-containing minerals are mainly enargite.

[0118] The method for separating and enriching chalcopyrite and enargite provided in this example is as follows:

[0119] (1) Add lime 1200g / t (calculated based on the ore material, the same below) and hydrogen peroxide 1000g / t to the ball mill for ore grinding, and the fineness of the material discharged from the ball mill is 95% of -0.074mm. Add butyl xanthate 40g / t, sodium sulfite 800g / t and pine oil 20g / t to the ground material in sequence, with an interval of 5min, stir for 5min, and then aerate to perform rough separation I for copper depression and arsenic flotation, to obtain rough separation I concentrate and rough separation I tailings;

[0120] (2) Add hydrogen peroxide 500g / t, butyl xanthate 20g / t, sodium sulfite 400g / t and pine oil 10g / t to the rough separation I tailings obtained in step (1) in sequence, with an interval of 5min, stir for 5min, and then perform rough separation II for copper depression and arsenic flotation, to obtain rough separation II concentrate and rough separation II tailings;

[0121] (3) Combine the rough separation I concentrate and the rough separation II concentrate obtained in steps (1) and (2) to perform arsenic concentration I, to obtain arsenic concentration I concentrate and arsenic concentration I tailings, wherein the arsenic concentration I tailings are returned to the rough separation I for copper depression and arsenic flotation;

[0122] (4) Perform arsenic concentration II on the arsenic concentration I concentrate obtained in step (3), to obtain high-arsenic copper concentrate and arsenic concentration II tailings, wherein the arsenic concentration II tailings are returned to the arsenic concentration I;

[0123] (5) In the rough copper selection tailings obtained in step (2), 800 g / t of activator (mass ratio of ethylenediaminetetraacetic acid to ammonium carbamate is 1:3), 30 g / t of ammonium dibutyl phosphate salt and 20 g / t of pine oil are sequentially added, the dosing interval is 5 min, and the copper rough selection is carried out after stirring for 5 min, to obtain copper rough selection concentrate and copper rough selection tailings;

[0124] (6) In the copper rough selection tailings obtained in step (5), 400 g / t of activator (mass ratio of ethylenediaminetetraacetic acid to ammonium carbamate is 1:3), 15 g / t of ammonium dibutyl phosphate salt and 10 g / t of pine oil are sequentially added, the dosing interval is 5 min, and the copper scavenging is carried out after stirring for 5 min, to obtain copper scavenging concentrate and copper scavenging tailings;

[0125] (7) The copper selection I is carried out on the copper rough selection concentrate obtained in step (5), to obtain copper selection I concentrate and copper selection I tailings, wherein the copper selection I tailings and the copper scavenging concentrate obtained in step (6) are combined and returned to the copper rough selection operation;

[0126] (8) The copper selection II is carried out on the copper selection I concentrate obtained in step (7), to obtain copper selection II concentrate and copper selection II tailings, wherein the copper selection II tailings are returned to the copper selection I operation;

[0127] (9) The copper selection III is carried out on the copper selection II concentrate obtained in step (8), to obtain low-arsenic copper concentrate and copper selection III tailings, wherein the copper selection III tailings are returned to the copper selection II operation.

[0128] The final low-arsenic copper concentrate has a copper grade of 30.65%, an arsenic content of 0.48%, and a copper recovery rate of 78.22%; the high-arsenic copper concentrate has a copper grade of 11.32%, an arsenic content of 13.22%, and a copper recovery rate of 17.52%.

[0129] Comparative Example 7

[0130] The traditional reagent system and method are used for the separation of the raw ore, i.e., equal mass of sodium hypochlorite is used instead of hydrogen peroxide, equal mass of sodium humate is used instead of sodium sulfite and is added before butyl xanthate, and equal mass of butyl xanthate is used instead of ammonium dibutyl phosphate salt in the copper rough selection and scavenging operations.

[0131] The final low-arsenic copper concentrate has a copper grade of 26.33%, an arsenic content of 0.97%, and a copper recovery rate of 73.52%; the high-arsenic copper concentrate has a copper grade of 12.42%, an arsenic content of 11.52%, and a copper recovery rate of 14.28%.

[0132] It can be seen from the embodiment 3 and the comparative example 7 that the separation indexes of the ore are obviously decreased by changing the type of the oxidant, the type of the inhibitor and the adding sequence and the type of the collector. Compared with hydrogen peroxide, the selectivity of sodium hypochlorite to the surface oxidation inhibition of chalcocite and chalcopyrite is insufficient, and the mutual inclusion of the two minerals in the copper concentrate is easily caused. Sodium humate is an organic compound, and has a strong inhibiting effect, but the selectivity is poor. In addition, compared with butyl xanthate, the ammonium salt of dibutyl phosphate has a stronger chelating performance on the surface of chalcopyrite, and can strongly collect chalcopyrite. Therefore, compared with the conventional reagent system and method, the present application has a better technical effect on the separation of chalcopyrite and chalcocite.

[0133] Comparative example 8

[0134] The other conditions are consistent with those in the embodiment 3, and the difference lies in that the ethylenediaminetetraacetic acid is used to replace the ammonium carbamate in the rough copper separation and the scavenging operation in the same mass, that is, the ammonium carbamate is not added, and the effect of the single ethylenediaminetetraacetic acid is analyzed.

[0135] Finally, the separation indexes of the low-arsenic copper concentrate are that the copper grade is 27.25%, the arsenic content is 0.46%, and the copper recovery rate is 72.87%; and the separation indexes of the high-arsenic copper concentrate are that the copper grade is 11.08%, the arsenic content is 12.42%, and the copper recovery rate is 17.56%.

[0136] It can be seen from the embodiment 3 and the comparative example 8 that when the ammonium carbamate is not added, the copper grade in the low-arsenic copper concentrate is reduced by about 3%, and the copper recovery rate is reduced by about 6%. The reason lies in that the ammonium carbamate can react with the complexing reaction of the copper active sites on the surface of chalcopyrite to generate copper ammonia complex cations, and promote the adsorption of the collector, and the activation capacity of the single ethylenediaminetetraacetic acid is limited.

[0137] Comparative example 9

[0138] The other conditions are consistent with those in the embodiment 3, and the difference lies in that the ethylenediaminetetraacetic acid is used to replace the ammonium carbamate in the rough copper separation and the scavenging operation in the same mass, that is, the ammonium carbamate is not added, and the effect of the single ethylenediaminetetraacetic acid is analyzed.

[0139] Finally, the separation indexes of the low-arsenic copper concentrate are that the copper grade is 27.25%, the arsenic content is 0.46%, and the copper recovery rate is 72.87%; and the separation indexes of the high-arsenic copper concentrate are that the copper grade is 11.08%, the arsenic content is 12.42%, and the copper recovery rate is 17.56%.

[0140] It can be seen from the embodiment 3 and the comparative example 9 that when the ethylenediaminetetraacetic acid is not added, the copper grade in the low-arsenic copper concentrate is reduced by about 4%, and the copper recovery rate is reduced by about 7%. The reason lies in that the ethylenediaminetetraacetic acid can effectively complex the hydrophilic species (such as calcium hydroxide, sulfate, hydroxyl compound, copper oxide and the like) on the surface of chalcopyrite to realize the passivation and activation of the chalcopyrite surface, but the activation capacity of the single ammonium carbamate is limited.

[0141] Comparative Example 10

[0142] Other conditions are consistent with Example 3, except that butyl xanthate is used instead of ammonium dibutyl phosphate in the copper roughing and copper scavenging operations.

[0143] The final low-arsenic copper concentrate has a copper grade of 27.32% and an arsenic content of 0.46%, and the copper recovery rate is 73.13%; the high-arsenic copper concentrate has a copper grade of 11.55% and an arsenic content of 12.85%, and the copper recovery rate is 17.38%.

[0144] As can be seen from Example 3 and Comparative Example 10, after butyl xanthate is used instead of ammonium dibutyl phosphate, the copper grade of the low-arsenic copper concentrate decreases by about 3%, and the copper recovery rate decreases by about 5 percentage points. The reason is that the ammonium dibutyl phosphate used in the present application can form a stable four-membered chelate ring through P-O-Cu and P=O-Cu coordination with the copper active sites on the surface of chalcopyrite, and can strongly collect chalcopyrite.

[0145] As can be seen from the above, the present application realizes the selective flotation separation of chalcopyrite and copper sulfide arsenic by the combination of "hydrogen peroxide oxidation modification-sodium sulfite desorption collector", the activator (a mixture of ethylenediaminetetraacetic acid and ammonium carbamate) can effectively inhibit the activation of chalcopyrite; on this basis, the ammonium salt of dibutyl phosphate strengthens the collection of chalcopyrite. The results of Example 1 and Comparative Example 1, Example 2 and Comparative Example 4, Example 3 and Comparative Example 7 show that compared with the traditional flotation reagent system and method, the present application can increase the copper grade of low-arsenic copper concentrate by 2-4%, the arsenic content is all <0.5%, the copper recovery rate is increased by 4-5%, and the total copper recovery rate is increased by 5-9%. The combination of hydrogen peroxide and sodium sulfite plays a strong positive synergistic effect, and can realize the selective inhibition of chalcopyrite. The results of Example 1 and Comparative Example 2 and Comparative Example 3 show that without the addition of hydrogen peroxide, the copper grade of low-arsenic copper concentrate is decreased by about 2 percentage points, the arsenic content is increased from 0.32% to 0.68%, the total copper recovery rate is decreased by about 7.7%, and the indicators of high-arsenic copper concentrate also decrease. Without the addition of sodium sulfite, the copper grade of low-arsenic copper concentrate is decreased by about 1 percentage point, the arsenic content is increased from 0.32% to 0.62%, and the total copper recovery rate is decreased by about 10%. The activator plays an important positive role in the enrichment of chalcopyrite. The results of Example 2 and Comparative Example 5 show that without the addition of activator, the copper grade of low-arsenic copper concentrate is decreased by about 4.5 percentage points, and the copper recovery rate is decreased by about 10%. The results of Example 3 and Comparative Example 8, Comparative Example 9 show that under the activation of single ethylenediaminetetraacetic acid or ammonium carbamate, the copper grade of low-arsenic copper concentrate is decreased by 3-4 percentage points, and the copper recovery rate is decreased by about 6-7%. The ammonium salt of dibutyl phosphate has a good selective collection effect on chalcopyrite. The results of Example 2 and Comparative Example 6, Example 3 and Comparative Example 10 show that compared with the traditional collector (ethyl thiuram sulfide, butyl xanthate), the copper grade of low-arsenic copper concentrate is decreased by 2.31% (Comparative Example 6) and 3.33% (Comparative Example 10) respectively, and the copper recovery rate is decreased by 4.19% (Comparative Example 6) and 5.09% (Comparative Example 10) respectively. The results of Examples 1-3 confirm that the present application has good adaptability to the separation of arsenic-containing sulfide ore, the copper grade of low-arsenic copper concentrate is greater than 23%, the arsenic content is less than 0.5%, the arsenic content in high-arsenic copper concentrate is greater than 8%, the total copper recovery rate is greater than 90%, and the effective separation and enrichment of chalcopyrite and copper sulfide arsenic are realized.

[0146] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for flotation separation and enrichment of chalcopyrite and arsenic copper ore, characterized in that: Lime and hydrogen peroxide are added during the raw ore grinding process, and then a collector, an inhibitor and a frother are added, and a process of two roughing and two cleaning is adopted to suppress copper and float arsenic to obtain high-arsenic copper concentrate and copper-containing tailings; an activator, a high-efficiency collector and a frother are added to the copper-containing tailings, and a process of one roughing, one scavenging and three cleaning is adopted to select copper to obtain low-arsenic copper concentrate and tailings. The process specifically includes the following steps: (1) During the grinding process of the raw ore, lime and hydrogen peroxide are added to obtain a grinding material, and a collector, a chalcopyrite inhibitor and a foaming agent are sequentially added to the grinding material to perform a roughing process to suppress copper and float arsenic. , get rough selection Concentrates and roughers tailings; (2) In the rough selection Hydrogen peroxide, collector, chalcopyrite inhibitor and foaming agent are added to the tailings in sequence to suppress copper and float arsenic in roughing. , get rough selection Concentrates and roughers tailings; (3) The rough selection The concentrate and the rougher II concentrate are combined and then subjected to arsenic concentration. , get arsenic selection Concentrate and arsenic beneficiation Tailings, where the arsenic is concentrated Tailings are returned to the rougher for copper suppression and arsenic flotation Operation; (4) Selecting the arsenic Arsenic beneficiation of concentrate , to obtain high arsenic copper concentrate and arsenic concentrate Tailings, where the arsenic is concentrated Tailings returned to arsenic concentrator Operation; (5) In the rough selection An activator, a high-efficiency collector and a frother are sequentially added to the tailings to perform copper roughing to obtain copper roughing concentrate and copper roughing tailings; (6) adding an activator, a high-efficiency collector, and a frother to the copper rougher tailings in sequence to perform copper scavenging to obtain copper scavenging concentrate and copper scavenging tailings; (7) Copper beneficiation of the copper rougher concentrate , get copper concentrate Concentrate and copper beneficiation Tailings, where the copper is concentrated The tailings and the copper scavenging concentrate are combined and returned to the copper roughing operation; (8) Concentrating the copper Copper beneficiation from concentrate , get copper concentrate Concentrate and copper beneficiation Tailings, where the copper is concentrated Tailings returned to copper concentrate Operation; (9) Concentrating the copper Copper beneficiation from concentrate , to obtain low arsenic copper concentrate and copper concentrate Tailings, where the copper is concentrated Tailings returned to copper concentrate Operation; In step (1), based on the raw ore, the amount of lime added is 800-1200 g / t; the amount of hydrogen peroxide added is 800-1000 g / t; the amount of collector added is 20-40 g / t; the amount of chalcopyrite inhibitor added is 600-800 g / t; and the amount of foaming agent added is 10-20 g / t.

2. The method for flotation separation and enrichment of chalcopyrite and arsenic copper ore according to claim 1, characterized in that: In step (1), the non-arsenic-containing copper sulfide mineral in the raw ore is chalcopyrite, and the arsenic-containing mineral is arsenic-sulfur copper ore; and / or The collector is butyl xanthate; and / or The inhibitor of chalcopyrite is sodium sulfite; and / or The foaming agent is pine oil; and / or The grinding is carried out in a ball mill until the fineness of the material discharged from the ball mill is -0.074 mm, accounting for 85-95 wt%.

3. The method for flotation separation and enrichment of chalcopyrite and arsenic copper ore according to claim 1, characterized in that: In step (2), the collector is butyl xanthate; and / or The inhibitor of chalcopyrite is sodium sulfite; and / or The foaming agent is pine oil.

4. The method for flotation separation and enrichment of chalcopyrite and arsenic copper ore according to claim 3, characterized in that: In step (2), based on the raw ore, the amount of hydrogen peroxide added is 400-500 g / t, the amount of the collector added is 10-20 g / t, the amount of the chalcopyrite inhibitor added is 300-400 g / t, and the amount of the foaming agent added is 5-10 g / t.

5. The method for flotation separation and enrichment of chalcopyrite and arsenic copper ore according to claim 1, characterized in that: In step (5), the activator is a mixture of ethylenediaminetetraacetic acid and ammonium carbamate in a mass ratio of 1:(1-3); and / or The efficient collector is dibutyl phosphate ammonium salt; and / or The foaming agent is pine oil.

6. The method for flotation separation and enrichment of chalcopyrite and arsenic copper ore according to claim 5, characterized in that: In step (5), based on the raw ore, the added amount of the activator is 400-800 g / t, the added amount of the high-efficiency collector is 10-30 g / t, and the added amount of the foaming agent is 10-20 g / t.

7. The method for flotation separation and enrichment of chalcopyrite and arsenic copper ore according to claim 1, characterized in that: In step (6), the activator is a mixture of ethylenediaminetetraacetic acid and ammonium carbamate in a mass ratio of 1:(1-3); and / or The efficient collector is dibutyl phosphate ammonium salt; and / or The foaming agent is pine oil.

8. The method for flotation separation and enrichment of chalcopyrite and arsenic copper ore according to claim 7, characterized in that: In step (6), based on the raw ore, the added amount of the activator is 200-400 g / t, the added amount of the high-efficiency collector is 5-15 g / t, and the added amount of the foaming agent is 5-10 g / t.

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