CN112604816A - Copper-sulfur separation inhibitor, lime-free copper-sulfur flotation separation method and application - Google Patents
Copper-sulfur separation inhibitor, lime-free copper-sulfur flotation separation method and application Download PDFInfo
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- CN112604816A CN112604816A CN202011364004.XA CN202011364004A CN112604816A CN 112604816 A CN112604816 A CN 112604816A CN 202011364004 A CN202011364004 A CN 202011364004A CN 112604816 A CN112604816 A CN 112604816A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention provides a copper-sulfur separation inhibitor, a lime-free copper-sulfur flotation separation method and application, and relates to the technical field of mineral processing. The copper-sulfur separation inhibitor comprises raw materials of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide, has the characteristics of strong inhibition capacity, good selectivity and the like, and can achieve a good inhibition effect by using a small amount in the copper-sulfur beneficiation process; the copper-sulfur separation inhibitor can replace the traditional lime inhibitor, realizes the environmental protection and high-efficiency recovery of copper-sulfur resources under the condition of no lime, and overcomes the defects of low copper concentrate grade, calcium corrosion of pipelines and equipment, high pH value of tailing water, environmental pollution and the like caused by foam stickiness due to the adoption of lime as the inhibitor. The invention also provides a lime-free copper-sulfur flotation separation method, and the specific copper-sulfur separation inhibitor and the collecting agent are adopted in the flotation process of the copper-sulfur crude ore, so that the high-efficiency separation of copper and sulfur is realized.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a copper-sulfur separation inhibitor, a lime-free copper-sulfur flotation separation method and application.
Background
Copper is an important strategic resource in China, and is widely applied to the fields of electricity, light industry, mechanical manufacturing, building industry, national defense industry and the like due to the advantages of good ductility, high thermal conductivity, high electrical conductivity and the like. Copper is present in the earth's crust in an amount of about 0.01%, mostly as compounds, i.e., copper ore. Copper ores can be divided into three categories: (1) sulphide ores, e.g. chalcopyrite (CuFeS)2) Bornite (Cu)5FeS4) And chalcocite (Cu)2S), and the like; (2) the oxidation of the ore is carried out,such as cuprite (Cu)2O), malachite [ Cu ]2(OH)2CO3]Blue copper ore [2CuCO ]3·Cu(OH)2]Sildendum (CuSiO)3·2H2O), etc.; (3) native copper. The amount of copper detected in the world is about 3.5-5.7 million tons, and the porphyry copper ore accounts for about 76% of the total amount, and most of the porphyry copper ore contains a certain amount of sulfur. Because of the similar floatability of copper and sulfur, a large amount of sulfur suppressor is added in the copper flotation in order to obtain an acceptable copper concentrate.
At present, lime is mostly adopted as a sulfur inhibitor in copper-sulfur beneficiation in industrial production. However, the use of lime has great disadvantages, firstly, lime needs to be prepared into lime milk for use, the workload is large, and potential safety hazards exist due to strong alkalinity; secondly, in the using process, scale is easy to form, pipelines are easy to block, and the fluctuation of the addition amount is large, so that the fluctuation of industrial production indexes is large; thirdly, after a large amount of lime is added, flotation foam is sticky, pipeline transportation is difficult, and concentrate filtration is difficult; fourthly, the alkalinity of the tailings is high after lime is used, the pH value is even more than 10, the tailings cannot be discharged outside, and the environmental protection pressure is huge; fifthly, the lime is mined and fired, which causes great pollution to the environment and serious damage to water and soil, and as the national environmental protection policy is tightened, the lime is difficult to mine and fire, and the method of adding a large amount of lime to select copper and sulfur ores is difficult to continue. Although a copper-sulfur ore beneficiation method using strong oxidants such as calcium hypochlorite and potassium permanganate to replace lime is also reported, the method has the defects of easy invalidation of reagents, large potential safety hazards of storage and operation, large fluctuation of production indexes and incapability of large-scale industrial application. Therefore, how to separate the copper-sulfur ore more environmentally and efficiently and produce qualified copper concentrate is an urgent problem to be solved in copper-sulfur ore dressing.
In view of the above, the present invention is particularly proposed to solve at least one of the above technical problems.
Disclosure of Invention
The first purpose of the invention is to provide a copper-sulfur separation inhibitor with strong inhibition capability and good selectivity, so as to overcome various disadvantages caused by the traditional adoption of lime as an inhibitor.
The second purpose of the invention is to provide a lime-free copper-sulfur flotation separation method.
The third purpose of the invention is to provide the copper-sulfur separation inhibitor and the application of the lime-free copper-sulfur flotation separation method.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a copper-sulfur separation inhibitor which comprises the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the calcium chloride to the sodium hydroxide is (1-4): (1-4): (1-4): 1.
further, on the basis of the technical scheme of the invention, the mass ratio of the sodium carbonate, the ammonium sulfate, the calcium chloride and the sodium hydroxide is (1.5-3): (1.5-3): (1.5-3): 1, preferably 2: 2: 2: 1.
the invention also provides a lime-free copper-sulfur flotation separation method, which comprises the following steps:
(a) providing ore pulp prepared from copper-sulfur raw ore;
adding an inhibitor, a collecting agent and a foaming agent into the ore pulp for roughing to obtain copper roughing concentrate and roughing tailings;
(b) adding an inhibitor into the copper roughing concentrate for fine separation to obtain copper concentrate;
wherein the inhibitor in step (a) and the inhibitor in step (b) are both the copper-sulfur separation inhibitor according to claim 1 or 2; the collecting agent in the step (a) comprises ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether, wherein the mass ratio of the ethionamide to the sodium isobutyl black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is (2-6): (2-6): (1-2): 1.
further, on the basis of the technical scheme of the invention, the dosage of the inhibitor in the step (a) is 80-500g/t calculated according to the mass of the inhibitor in the copper-sulfur raw ore.
Further, on the basis of the technical scheme of the invention, in the collecting agent in the step (a), the mass ratio of ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether is (2.5-5): (2.5-5): (1-1.8): 1, preferably 4: 4: 1: 1;
preferably, the amount of the collector used in step (a) is 10-60g/t calculated by the mass of the collector in the raw copper-sulfur ore.
Further, on the basis of the above technical solution of the present invention, in step (a), the foaming agent includes any one or a combination of at least two of pine oil, isobutanol or methyl isobutyl carbinol;
preferably, the amount of the foaming agent in step (a) is 5-20g/t calculated by the mass of the foaming agent in the raw copper-sulfur ore.
Further, on the basis of the above technical scheme of the present invention, in the step (a), at least one roughing is performed;
preferably, the rougher tailings obtained in step (a) are subjected to at least two scavenging;
preferably, the rougher tailings obtained in the step (a) are scavenged twice, collecting agents are added in the scavenging process, and the using amounts of the collecting agents in the scavenging I and the scavenging II are respectively and independently 3-15g/t according to the mass of the collecting agents in the copper-sulfur crude ore;
preferably, the collecting agent added in the scavenging process comprises ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether, and the mass ratio of the ethionamide to the sodium isobutyl black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is (2-6): (2-6): (1-2): 1.
further, on the basis of the technical scheme of the invention, in the step (a), the copper-sulfur raw ore is ground and added with water to prepare ore pulp;
preferably, in the step (a), the copper-sulfur raw ore is ground to the fineness of-0.074 mm, which accounts for 50-85%;
preferably, in the step (a), the mass concentration of the ore pulp is 30-45%.
Further, on the basis of the technical scheme of the invention, the dosage of the inhibitor in the step (b) is 10-60g/t calculated according to the mass of the inhibitor in the copper-sulfur raw ore.
Further, on the basis of the technical scheme of the invention, in the step (b), the roughing concentrate of copper is refined at least three times;
preferably, in the step (b), the copper rougher concentrate is subjected to three times of concentration, and the dosage of the inhibitor in the concentration I is 5-15g/t, the dosage of the inhibitor in the concentration II is 4-20g/t, and the dosage of the inhibitor in the concentration III is 1-10g/t according to the mass of the inhibitor in the copper sulfur crude ore.
The invention also provides application of the copper-sulfur separation inhibitor or the lime-free copper-sulfur flotation separation method in mineral treatment.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention provides a copper-sulfur separation inhibitor, which comprises raw materials such as sodium carbonate, ammonium sulfate, calcium chloride, sodium hydroxide and the like, wherein the copper-sulfur separation inhibitor prepared by adopting the raw materials according to a specific dosage ratio has the characteristics of strong inhibition capability, good selectivity and the like, and can achieve a good inhibition effect by using a small dosage in a copper-sulfur ore dressing process; the copper-sulfur separation inhibitor can replace the traditional lime inhibitor, realizes the environmental protection and high-efficiency recovery of copper-sulfur resources under the condition of no lime, and overcomes various defects of low copper concentrate grade, calcium corrosion of pipelines and equipment, high pH value of tailing water, environmental pollution and the like caused by foam stickiness due to the adoption of lime as the inhibitor.
(2) The invention provides a lime-free copper-sulfur flotation separation method, which avoids the traditional technical scheme of inhibiting copper flotation by using a large amount of lime by adopting the specific copper-sulfur separation inhibitor in the flotation process of copper-sulfur raw ores, overcomes the defects of low grade of copper concentrate, calcium corrosion of pipelines and equipment, high pH value of tailing water, environmental pollution and the like caused by foam stickiness due to the fact that a large amount of lime is required to be added in the traditional lime method, realizes the environmental protection and high-efficiency recovery of copper-sulfur resources under the lime-free condition, and has good economic and environmental benefits and application prospects; meanwhile, the specific collecting agent is matched with the copper-sulfur separation inhibitor, so that sulfur can be well inhibited, copper can selectively float, the grade and the recovery rate of copper concentrate are ensured, and the high-efficiency separation of copper and sulfur is ensured.
(3) The invention provides the copper-sulfur separation inhibitor and the application of the lime-free copper-sulfur flotation separation method, and the copper-sulfur separation inhibitor and the lime-free copper-sulfur flotation separation method have good application in the field of mineral processing in view of the advantages of the copper-sulfur separation inhibitor and the lime-free copper-sulfur flotation separation method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a process flow diagram of a lime-free copper-sulfur flotation separation method provided in example 7 of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to embodiments and examples, but those skilled in the art will understand that the following embodiments and examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Those who do not specify the conditions are performed according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
According to a first aspect of the present invention, there is provided a copper-sulfur separation inhibitor comprising the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the calcium chloride to the sodium hydroxide is (1-4): (1-4): (1-4): 1.
in view of the disadvantages of the prior art using lime as the copper-sulfur separation inhibitor, the invention provides a lime-free copper-sulfur separation inhibitor, which uses specific amounts of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxideAnd compounding. Wherein, the sodium carbonate can remove the influence of inevitable ions such as calcium, magnesium and the like in water and has the function of dispersing ore pulp; acid-base buffer pair NH generated after ammonium sulfate is dissolved in ore pulp3-NH+The pH value of the system can be maintained, so that the hydroxylation degree of the surface of the pyrite in the copper-sulfur crude ore (the sulfur in the copper-sulfur crude ore exists mainly in the form of pyrite) is maintained, and the pyrite is subjected to hydrophilic inhibition; NH (NH)3A small amount of Cu dissolved out from the copper-sulfur raw ore in water2+Generate a complex reaction to generate a copper ammonia complex [ Cu (NH)3)4(H2O)2]2+The copper ion can be consumed in the ore pulp, so that the activation of the surface of the pyrite by the copper ion is prevented; ca is released after calcium chloride and sodium hydroxide are dissolved in ore pulp2+And OH-CaO and Ca (OH) are adsorbed and formed on the surface of the pyrite+、Ca(OH)2、Fe(OH)2And Fe (OH)3Thereby rendering pyrite hydrophilically inhibited. Through the compounding of the components, the inhibitor has the characteristics of good selectivity, strong inhibition capability and the like, can achieve a good inhibition effect by using a small amount in the roughing process, can completely replace a lime inhibitor, and overcomes various defects of lime as the inhibitor.
The mass ratio of the sodium carbonate, the ammonium sulfate, the calcium chloride and the sodium hydroxide needs to be controlled within a specific numerical range, and the inhibition effect of the inhibitor is influenced if the mass ratio exceeds the specific numerical range. Typical but not limiting mass ratios between sodium carbonate, ammonium sulphate, calcium chloride and sodium hydroxide are 1: 1: 1: 1. 1: 2: 1: 1. 1: 3: 1: 1. 1: 4: 1: 1. 1: 2: 2: 1. 1: 3: 3: 1. 1: 4: 4: 1. 2: 1: 1: 1. 1.5: 1.5: 1.5: 1. 1.5: 3: 1.5: 1. 2: 2: 2: 1. 3: 2: 4: 1. 3: 3: 3: 1. 3: 4: 4: 1. 4: 3: 3: 1. 4: 1: 3: 1. 4: 2: 3: 1 or 3.5: 3.5: 3.5: 1.
in a preferred embodiment of the present invention, the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is (1.5-3): (1.5-3): (1.5-3): 1, preferably 2: 2: 2: 1.
through further limiting the mass ratio of each component in the inhibitor, the coordination effect among the components is stronger, and the selectivity and the inhibition capability of the inhibitor are further improved.
According to the second aspect of the invention, the invention also provides a lime-free copper-sulfur flotation separation method, which comprises the following steps:
(a) providing ore pulp prepared from copper-sulfur raw ore;
adding an inhibitor, a collecting agent and a foaming agent into the ore pulp for roughing to obtain copper roughing concentrate and roughing tailings;
(b) adding an inhibitor into the copper roughing concentrate for fine separation to obtain copper concentrate;
wherein the inhibitor in the step (a) and the step (b) adopts the copper-sulfur separation inhibitor; the collecting agent in the step (a) comprises ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether, wherein the mass ratio of the ethionamide to the sodium isobutyl black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is (2-6): (2-6): (1-2): 1.
according to the lime-free copper-sulfur flotation separation method provided by the invention, the specific copper-sulfur separation inhibitor is adopted in the flotation process of the copper-sulfur raw ore, the traditional technical scheme that a large amount of lime is adopted to inhibit the copper from being subjected to sulfur flotation is avoided, the defects that the foam stickiness is caused by the addition of a large amount of lime in the traditional lime method, the grade of copper concentrate is not high, the calcium corrosion of pipelines and equipment is caused, the pH value of tail ore water is high, the environment is polluted and the like are overcome, the environment-friendly and efficient recovery of copper-sulfur resources is realized under the lime-free condition, and the lime-free copper-sulfur flotation separation method has good economic and environment.
It should be further noted that in the lime-free copper-sulfur flotation separation method, a specific type of collecting agent is used in combination with an inhibitor, so that sulfur can be well inhibited, copper can selectively float upwards, the grade and recovery rate of copper concentrate are ensured, and efficient separation of copper and sulfur is ensured.
The collecting agent is prepared by compounding ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether. The selectivity of the ethionamide to copper flotation is good, and the collecting capacity of the ethionamide to pyrite is weak; the sodium isobutylate black powder has good selectivity on copper flotation, particularly has obvious collecting effect on micro-fine copper and weak collecting force on pyrite; the diesel oil has the function of a solvent and can eliminate excessive foams; the fatty alcohol-polyoxyethylene ether is a penetrating agent, has fixed hydrophilic and oleophilic groups, can be directionally arranged on the surface of a solution, can obviously reduce the surface tension, and can promote better mutual solubility of ethionamide, sodium isobutyl ether and diesel oil. Through the compounding of the raw materials, the collecting agent has the characteristics of good selectivity, strong collecting capability and the like, and a better flotation effect can be achieved by using a small amount of the collecting agent in the rough concentration process.
The typical but non-limiting mass ratio of ethionamide, sodium isobutyl ether, diesel oil and fatty alcohol-polyoxyethylene ether in the collector is 2: 2: 1: 1. 2: 2: 2: 1. 3: 3: 1: 1. 3: 3: 2: 1. 4: 4: 1: 1. 4: 4: 2: 1. 5: 5: 1: 1. 6: 6: 1: 1. 2: 3: 1: 1. 2: 4: 2: 1. 2: 6: 2: 1. 4: 3: 1: 1. 5: 4: 1: 1. 6: 4: 1: 1. 5: 4: 2: 1 or 6: 4: 2: 1.
in a preferred embodiment of the invention, the copper-sulfur raw ore is ground and added with water to prepare ore pulp.
Since the copper and sulfur raw ore is mostly blocky or granular and is not beneficial to the subsequent flotation process, the copper and sulfur raw ore needs to be ground.
As a preferred embodiment of the present invention, in the step (a), the copper-sulfur raw ore is ground to a fineness of-0.074 mm in the range of 50 to 85%.
In a preferred embodiment of the invention, in the step (a), the mass concentration of the ore pulp is 30-45%.
The mass concentration of the ore pulp is too low, so that the medicament consumption is high easily, and the recovery rate of copper concentrate is influenced; the ore pulp has too high mass concentration, and is easy to cause impurities to influence the grade of the concentrate. Therefore, the mass concentration of the ore pulp needs to be controlled within a specific range. Typical, but not limiting, slurries have a mass concentration of 30%, 32%, 34%, 35%, 38%, 40%, 42%, 44%, or 45%.
In a preferred embodiment of the invention, the inhibitor is used in the roughing process in step (a) in an amount of 80-500g/t, calculated on the mass of the inhibitor in the copper-sulfur raw ore.
The adding amount of the inhibitor has certain influence on the separation effect, when the amount of the inhibitor is too small (lower than 80g/t), sulfur inhibition is easy to be caused, the inhibitor floats upwards along with copper, the grade of copper concentrate is influenced, when the amount of the inhibitor is too large (higher than 500g/t), part of copper is easy to be inhibited, the recovery rate of the copper concentrate is influenced, and therefore the amount of the inhibitor needs to be controlled within a specific numerical range. Typical, but non-limiting, amounts of inhibitor used in step (a) are 80g/t, 100g/t, 1200g/t, 150g/t, 1800g/t, 200g/t, 220g/t, 250g/t, 280g/t, 300g/t, 320g/t, 350g/t, 380g/t, 400g/t, 420g/t, 450g/t, 480g/t or 500 g/t.
As a preferred embodiment of the invention, the mass ratio of the ethionamide, the isobutyl sodium black powder, the diesel oil and the fatty alcohol-polyoxyethylene ether in the collecting agent in the step (a) is (2.5-5): (2.5-5): (1-1.8): 1, preferably 4: 4: 1: 1.
in a preferred embodiment of the invention, the amount of the collector used in the step (a) is 10-60g/t calculated by the mass of the collector in the copper-sulfur raw ore.
Typical, but non-limiting, amounts of collector used in the roughing step (a) are 10g/t, 20g/t, 30g/t, 40g/t, 50g/t or 60 g/t.
As a preferred embodiment of the present invention, in step (a), the foaming agent comprises any one or a combination of at least two of pine oil, isobutanol or methyl isobutyl carbinol, and preferably comprises pine oil.
In a preferred embodiment of the present invention, the amount of the foaming agent used in step (a) is 5 to 20g/t, based on the mass of the foaming agent in the raw copper-sulfur ore.
Typical but non-limiting amounts of blowing agent used during the rougher in step (a) are 5g/t, 8g/t, 10g/t, 12g/t, 15g/t, 18g/t or 20 g/t.
By further limiting the dosage and the type of the inhibitor, the collector and the foaming agent, the sulfur in the copper-sulfur crude ore is selectively inhibited, and the floating of copper is not influenced, so that the high-efficiency copper-sulfur separation is realized.
In a preferred embodiment of the present invention, in step (a), at least one roughing is performed. And roughing the copper concentrate obtained after roughing to obtain a foam product.
The amount of the inhibitor, the collector and the foaming agent in the roughing process is the total amount of the added agents, for example, two times of roughing is carried out, and the total amount of the added collector in the two times of roughing is 10-60 g/t.
As a preferred embodiment of the present invention, the rougher tailings obtained in step (a) are subjected to at least two scavenger passes. And (3) carrying out scavenging on the rougher tailings for multiple times, so that the copper flotation time is long enough, the floating probability of copper is increased, and the recovery rate of copper is improved.
The middlings obtained by multiple times of scavenging can be sequentially returned to the previous operation for sorting.
As a preferred embodiment of the present invention, the rougher tailings obtained in step (a) are subjected to two scavenges (i.e. scavenger i and scavenger ii).
Preferably, the collecting agent is added in the scavenging process, and the using amounts of the collecting agent in the scavenging I and the scavenging II are respectively and independently 3-15g/t calculated according to the mass of the collecting agent in the copper-sulfur raw ore.
That is, typical, but non-limiting, amounts of collector used in the scavenger I process are 3g/t, 5g/t, 8g/t, 10g/t, 13g/t, or 15 g/t. Typical but non-limiting amounts of collector used in the scavenger II process are 3g/t, 5g/t, 8g/t, 10g/t, 13g/t or 15 g/t.
Preferably, the collecting agent added in the scavenging process comprises ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether, and the mass ratio of the ethionamide to the sodium isobutyl black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is (2-6): (2-6): (1-2): 1.
in a preferred embodiment of the present invention, in step (b), the amount of the inhibitor is 10-60g/t, calculated by the mass of the inhibitor in the raw copper-sulfur ore.
Typical but non-limiting amounts of inhibitor used in the beneficiation of step (b) are 10g/t, 20g/t, 30g/t, 40g/t, 50g/t or 60 g/t.
By specifically limiting the dosage of the inhibitor in the concentration process, the sulfur can be well inhibited, and the copper can float upwards, so that the effect of separating the copper from the sulfur is ensured.
In a preferred embodiment of the present invention, in step (b), the copper rougher concentrate is refined at least three times, for example, 4 times, 5 times, 6 times or 7 times, and the selection is specifically made according to actual conditions. Generally, the middlings obtained after the concentration are sequentially returned to the previous operation for the concentration, for example, the middlings obtained by the concentration are returned to the concentration operation.
Preferably, in step (b), the copper rougher concentrate is subjected to three beneficiating operations (i.e., beneficiating i, beneficiating ii, and beneficiating iii). According to the mass of the inhibitor in the copper-sulfur raw ore, the dosage of the inhibitor in the concentration I is 5-30g/t, the dosage of the inhibitor in the concentration II is 4-20g/t, and the dosage of the inhibitor in the concentration III is 1-10 g/t.
Typical, but non-limiting, amounts of inhibitor in selection I are 5g/t, 10g/t, 15g/t, 20g/t, 25g/t or 30 g/t. Typical but non-limiting amounts of inhibitor in selection II are 4g/t, 6g/t, 8g/t, 11g/t, 14g/t, 17g/t or 20 g/t. Typical but non-limiting amounts of inhibitor in selection III are 1g/t, 3g/t, 5g/t, 7g/t, 8g/t or 10 g/t.
It should also be noted that the amount of inhibitor used in the concentration process is 10-60g/t of the total amount of the agent added, for example, three times of concentration, and the total amount of inhibitor added in the three times of concentration is 10-60 g/t.
According to the third aspect of the invention, the application of the copper-sulfur separation inhibitor or the lime-free condition copper-sulfur flotation separation method is also provided.
In view of the advantages of the copper-sulfur separation inhibitor or the lime-free copper-sulfur flotation separation method, the copper-sulfur flotation separation inhibitor or the lime-free copper-sulfur flotation separation method has good application in the field of mineral processing.
The present invention will be further described with reference to specific examples and comparative examples.
Example 1
The embodiment provides a copper-sulfur separation inhibitor, which comprises the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the calcium chloride to the sodium hydroxide is 2: 2: 2: 1.
Example 2
The embodiment provides a copper-sulfur separation inhibitor, which comprises the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 1: 1: 1: 1.
Example 3
The embodiment provides a copper-sulfur separation inhibitor, which comprises the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 4: 4: 4: 1.
Example 4
The embodiment provides a copper-sulfur separation inhibitor, which comprises the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 1.5: 2.5: 2.5: 1.
example 5
The embodiment provides a copper-sulfur separation inhibitor, which comprises the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 1: 3: 2: 1.
Example 6
The embodiment provides a copper-sulfur separation inhibitor, which comprises the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the calcium chloride to the sodium hydroxide is 2: 3: 3: 1.
Example 7
Carrying out flotation separation on certain copper-sulfur raw ore (the Cu content is 0.71%, and the S content is 14.13%).
The embodiment provides a method for separating copper and sulfur by flotation under lime-free conditions, which adopts a one-rough-two-scavenging-three-fine process, wherein middlings obtained by concentration I and scavenging I are returned to rough concentration, middlings obtained by concentration II and concentration III are sequentially returned to the previous concentration operation, and middlings obtained by scavenging II are returned to scavenging I, the process flow is shown in figure 1, and the method specifically comprises the following steps:
(a) grinding the copper-sulfur raw ore to the fineness of-0.074 mm and accounting for 65%, adding water to prepare ore pulp, wherein the mass concentration of the ore pulp is 36%, and sequentially adding 200g/t of inhibitor, 40g/t of collecting agent and 10g/t of foaming agent into the ore pulp to perform primary roughing to obtain foam products, namely copper roughing concentrate and roughing tailings; the collector comprises ethionamide, sodium isobutylate black powder, diesel oil and fatty alcohol-polyoxyethylene ether (the mass ratio of the ethionamide to the sodium isobutylate black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is 4: 4: 1: 1), and the foaming agent is pine oil;
(b) performing scavenging twice on the rougher tailings obtained in the step (a), wherein the use amounts of collecting agents (ethyl thiourethane, sodium isobutyl ether black, diesel oil and fatty alcohol-polyoxyethylene ether in a mass ratio of 4: 4: 1: 1) in the scavenging I and the scavenging II are respectively 5g/t and 5g/t, and sequentially returning middlings obtained after scavenging to the previous operation for sorting;
and (b) adding the copper-sulfur separation inhibitor provided in the example 1 into the copper roughed concentrate obtained in the step (a) to carry out three times of concentration operation, wherein the dosage of the inhibitor in the concentration I is 30g/t, the dosage of the inhibitor in the concentration II is 15g/t, the dosage of the inhibitor in the concentration III is 5g/t, and a copper concentrate product is obtained after the concentration is finished.
Example 8
This example provides a lime-free copper sulfur flotation separation process, which is the same as example 7, except that the suppressors in step (a) and step (b) were replaced with the copper sulfur separation suppressors provided in example 2.
Example 9
This example provides a lime-free copper sulfur flotation separation process, which is the same as example 7, except that the suppressors in step (a) and step (b) were replaced with the copper sulfur separation suppressors provided in example 3.
Example 10
This example provides a lime-free copper sulfur flotation separation process, which is the same as example 7, except that the suppressors in step (a) and step (b) were replaced with the copper sulfur separation suppressors provided in example 4.
Example 11
The embodiment provides a method for separating copper and sulfur by flotation under lime-free conditions, which comprises the following steps of replacing the mass ratio of ethionamide, sodium isobutylate, diesel oil and fatty alcohol-polyoxyethylene ether in the collecting agent in the step (a) and the step (b) with 2: 2: 1: 1, the rest of the procedure was the same as in example 7.
Example 12
The embodiment provides a method for separating copper and sulfur by flotation under lime-free conditions, which comprises the following steps of replacing 6: 6: 2: 1, the rest of the procedure was the same as in example 7.
Example 13
The embodiment provides a method for separating copper and sulfur by flotation under lime-free conditions, which comprises the following steps of replacing the mass ratio of ethionamide, sodium isobutylate, diesel oil and fatty alcohol-polyoxyethylene ether in the collecting agent in the step (a) and the step (b) with 3: 5: 1.5: 1, the rest of the procedure was the same as in example 7.
Example 14
Carrying out flotation separation on certain copper-sulfur raw ore (the Cu content is 0.64 percent, and the S content is 12.13 percent).
The embodiment provides a lime-free copper-sulfur flotation separation method, which adopts a one-roughing, two-scavenging and three-refining process, wherein middlings obtained by concentration I and scavenging I are returned to roughing, middlings obtained by concentration II and concentration III are sequentially returned to the previous concentration operation, and middlings obtained by scavenging II are returned to scavenging I, and the method specifically comprises the following steps:
(a) grinding the copper-sulfur raw ore to the fineness of-0.074 mm accounting for 60%, adding water to prepare an ore pulp with the mass concentration of 36%, and sequentially adding 150g/t of inhibitor, 30g/t of collecting agent and 8g/t of foaming agent into the ore pulp to perform primary roughing to obtain a foam product copper roughing concentrate and roughing tailings; wherein the inhibitor is the copper-sulfur separation inhibitor provided in example 5 (the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 1: 3: 2: 1), the collector comprises ethionamide, sodium isobutylnirure, diesel oil and fatty alcohol-polyoxyethylene ether (the mass ratio of ethionamide, sodium isobutylnirure, diesel oil and fatty alcohol-polyoxyethylene ether is 3: 4: 2: 1), and the foaming agent is terpineol oil;
(b) performing scavenging twice on the rougher tailings obtained in the step (a), wherein the use amounts of collecting agents (ethyl thiourethane, sodium isobutyl ether black, diesel oil and fatty alcohol-polyoxyethylene ether in a mass ratio of 3: 4: 2: 1) in the scavenging I and the scavenging II are respectively 4g/t and 4g/t, and sequentially returning middlings obtained after scavenging to the previous operation for sorting;
and (b) adding the copper-sulfur separation inhibitor provided in example 5 into the copper roughed concentrate obtained in the step (a) to carry out concentration operation for 3 times, wherein the dosage of the inhibitor in the concentration I is 30g/t, the dosage of the inhibitor in the concentration II is 18g/t, and the dosage of the inhibitor in the concentration III is 8g/t, and obtaining a copper concentrate product after the concentration is finished.
Example 15
And carrying out flotation separation on certain copper-sulfur raw ore (the Cu content is 0.37 percent, and the S content is 6.16 percent).
The embodiment provides a lime-free copper-sulfur flotation separation method, which adopts a one-roughing, two-scavenging and three-refining process, wherein middlings obtained by concentration I and scavenging I are returned to roughing, middlings obtained by concentration II and concentration III are sequentially returned to the previous concentration operation, and middlings obtained by scavenging II are returned to scavenging I, and the method specifically comprises the following steps:
(a) grinding the copper-sulfur raw ore to the fineness of 55% with the fineness of-0.074 mm, adding water to prepare ore pulp, wherein the mass concentration of the ore pulp is 33%, sequentially adding 150g/t of inhibitor, 20g/t of collecting agent and 5g/t of foaming agent into the ore pulp, and performing primary roughing to obtain foam product copper roughing concentrate and roughing tailings; wherein the inhibitor is the copper-sulfur separation inhibitor provided in example 6 (the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 2: 3: 3: 1), the collector comprises ethionamide, sodium isobutylnirure, diesel oil and fatty alcohol-polyoxyethylene ether (the mass ratio of ethionamide, sodium isobutylnirure, diesel oil and fatty alcohol-polyoxyethylene ether is 4: 3: 1: 1), and the foaming agent is terpineol oil;
(b) performing scavenging twice on the rougher tailings obtained in the step (a), wherein the use amounts of collecting agents (ethyl thiourethane, sodium isobutyl ether black, diesel oil and fatty alcohol-polyoxyethylene ether in a mass ratio of 4: 3: 1: 1) in the scavenging I and the scavenging II are respectively 3g/t and 3g/t, and sequentially returning middlings obtained after scavenging to the previous operation for sorting;
and (b) adding the copper-sulfur separation inhibitor provided in the example 6 into the copper rougher concentrate obtained in the step (a) to carry out three times of concentration operation, wherein the dosage of the inhibitor in the concentration I is 20g/t, the dosage of the inhibitor in the concentration II is 10g/t, the dosage of the inhibitor in the concentration III is 5g/t, and a copper concentrate product is obtained after the concentration is finished.
Example 16
Carrying out flotation separation on certain copper-sulfur raw ore (the Cu content is 0.71%, and the S content is 14.13%).
The embodiment provides a lime-free copper-sulfur flotation separation method, which adopts a one-roughing, two-scavenging and three-refining process, wherein middlings obtained by concentration I and scavenging I are returned to roughing, middlings obtained by concentration II and concentration III are sequentially returned to the previous concentration operation, and middlings obtained by scavenging II are returned to scavenging I, and the method specifically comprises the following steps:
(a) grinding the copper-sulfur raw ore to the fineness of-0.074 mm accounting for 75%, adding water to prepare an ore pulp, wherein the mass concentration of the ore pulp is 38%, and sequentially adding 300g/t of an inhibitor, 50g/t of a collecting agent and 15g/t of a foaming agent into the ore pulp to perform primary roughing to obtain a foam product copper roughing concentrate and roughing tailings; wherein the inhibitor is the copper-sulfur separation inhibitor provided in example 7 (the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 2: 3: 3: 1), the collector comprises ethionamide, sodium isobutylnirure, diesel oil and fatty alcohol-polyoxyethylene ether (the mass ratio of ethionamide, sodium isobutylnirure, diesel oil and fatty alcohol-polyoxyethylene ether is 2: 5: 2: 1), and the foaming agent is terpineol oil;
(b) performing scavenging twice on the rougher tailings obtained in the step (a), wherein the use amounts of collecting agents (ethyl thiourethane, sodium isobutyl ether black, diesel oil and fatty alcohol-polyoxyethylene ether in a mass ratio of 2: 5: 2: 1) in the scavenging I and the scavenging II are respectively 8g/t and 8g/t, and sequentially returning middlings obtained after scavenging to the previous operation for sorting;
and (b) adding the copper-sulfur separation inhibitor provided in example 7 into the copper rougher concentrate obtained in the step (a) to carry out three times of concentration operation, wherein the dosage of the inhibitor in the concentration I is 40g/t, the dosage of the inhibitor in the concentration II is 20g/t, the dosage of the inhibitor in the concentration III is 10g/t, and a copper concentrate product is obtained after the concentration is finished.
Comparative example 1
The comparative example provides a copper-sulfur separation inhibitor comprising the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is 0.5: 0.5: 5: 1.
comparative example 2
The comparative example provides a copper-sulfur separation inhibitor comprising the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the calcium chloride to the sodium hydroxide is 5: 5: 2: 1.
Comparative example 3
The comparative example provides a copper-sulfur separation inhibitor comprising the following raw materials: sodium carbonate, ammonium sulfate and calcium chloride, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the calcium chloride is 2: 2: 2.
comparative example 4
The comparative example provides a copper-sulfur separation inhibitor comprising the following raw materials: ammonium sulfate, calcium chloride and sodium hydroxide, and no lime;
wherein the mass ratio of ammonium sulfate, calcium chloride and sodium hydroxide is 2: 2: 1.
comparative example 5
The comparative example provides a copper-sulfur separation inhibitor comprising the following raw materials: sodium carbonate, calcium chloride and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the calcium chloride to the sodium hydroxide is 2: 2: 1.
comparative example 6
The comparative example provides a copper-sulfur separation inhibitor comprising the following raw materials: sodium carbonate, ammonium sulfate and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the sodium hydroxide is 2: 2: 1.
comparative example 7
This comparative example provides a prior art copper sulfur separation inhibitor lime.
Comparative examples 8 to 14
This comparative example provides a copper sulfur beneficiation process, which is the same as example 7, except that the inhibitors in step (a) and step (b) are replaced with the copper sulfur separation inhibitors provided in comparative examples 1 to 7, respectively.
Comparative example 15
Carrying out flotation separation on certain copper-sulfur raw ore (the Cu content is 0.71%, and the S content is 14.13%).
The comparative example provides a copper-sulfur flotation separation method, which adopts a one-rough two-scavenging three-fine flow, wherein middlings obtained by concentration I and scavenging I are returned to rough concentration, middlings obtained by concentration II and concentration III are sequentially returned to the previous concentration operation, middlings obtained by scavenging II are returned to scavenging I, the process flow is shown in figure 1, and the method specifically comprises the following steps:
(a) grinding the copper-sulfur raw ore to the fineness of-0.074 mm accounting for 65%, adding water to prepare ore pulp with the mass concentration of 36%, and sequentially adding 4000g/t of inhibitor, 40g/t of collecting agent and 10g/t of foaming agent into the ore pulp to perform primary roughing to obtain foam product copper roughing concentrate and roughing tailings; the collector comprises ethionamide, sodium isobutylate, diesel oil and fatty alcohol-polyoxyethylene ether (the mass ratio of the ethionamide to the sodium isobutylate to the diesel oil to the fatty alcohol-polyoxyethylene ether is 4: 4: 1: 1), and the foaming agent is pine oil;
(b) performing scavenging twice on the rougher tailings obtained in the step (a), wherein the use amounts of collecting agents (ethyl thiourethane, sodium isobutyl ether black, diesel oil and fatty alcohol-polyoxyethylene ether in a mass ratio of 4: 4: 1: 1) in the scavenging I and the scavenging II are respectively 5g/t and 5g/t, and sequentially returning middlings obtained after scavenging to the previous operation for sorting;
adding inhibitor lime into the copper rough concentration obtained in the step (a) for carrying out concentration operation for 3 times, wherein the dosage of the inhibitor in the concentration I is 600g/t, the dosage of the inhibitor in the concentration II is 300g/t, the dosage of the inhibitor in the concentration III is 150g/t, and the copper concentrate product is obtained after the concentration is finished.
Comparative example 16
This comparative example provides a lime-free copper sulfur flotation separation process, which is the same as example 7 except that the collectors in step (a) and step (b) were replaced with butyl xanthate.
Comparative example 17
This comparative example provides a lime-free copper sulfur flotation separation process, which is the same as example 7 except that the collectors in step (a) and step (b) were replaced with ethionamide.
Comparative example 18
This comparative example provides a lime-free copper sulfur flotation separation process, which is the same as example 7 except that the collectors in step (a) and step (b) were replaced with sodium isobutyrate black.
Comparative example 19
The comparative example provides a lime-free copper-sulfur flotation separation method, which is the same as in example 7 except that the collecting agent in the steps (a) and (b) is replaced by a combination of ethioamine, diesel oil and fatty alcohol-polyoxyethylene ether (the mass ratio of the ethioamine, the diesel oil and the fatty alcohol-polyoxyethylene ether is 4: 1: 1).
Comparative example 20
The comparative example provides a lime-free copper-sulfur flotation separation method, except that the collecting agent in the step (a) and the step (b) is replaced by a combination of sodium isobutylate black powder, diesel oil and fatty alcohol-polyoxyethylene ether (the mass ratio of the sodium isobutylate black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is 4: 1: 1), and the other steps are the same as those in the example 7.
Comparative example 21
The comparative example provides a method for separating copper and sulfur by flotation under lime-free conditions, except that the mass ratio of ethionamide, isobutyl sodium black powder, diesel oil and fatty alcohol-polyoxyethylene ether in the collecting agent in the step (a) and the step (b) is replaced by 7: 1: 1: 1, the rest of the procedure was the same as in example 7.
Comparative example 22
The comparative example provides a method for separating copper and sulfur by flotation under lime-free conditions, except that the mass ratio of raw materials of ethionamide, sodium isobutyl ether, black powder, diesel oil and fatty alcohol-polyoxyethylene ether in the collecting agent in the step (a) and the step (b) is replaced by 1: 1: 3: 1, the rest of the procedure was the same as in example 7.
In order to verify the technical effects of the above-described examples and comparative examples, the following experimental examples were specifically set forth.
Experimental example 1
The product properties of the copper concentrates produced by the copper sulfur separation methods provided in examples 7-16 and comparative examples 8-22 were examined and the specific results are shown in table 1.
TABLE 1
As can be seen from the data in Table 1, the copper concentrate produced by the copper-sulfur separation inhibitor and the lime-free copper-sulfur flotation separation method provided by the invention has higher grade and recovery rate, which are 2-3% higher than those of the copper concentrate produced by the conventional lime inhibitor, and the recovery rate is 2-3% higher than those of the copper concentrate produced by the conventional lime inhibitor, so that lime can be completely replaced, the high-efficiency separation of copper and sulfur in the copper-sulfur raw ore can be realized, the consumption of the inhibitor is greatly reduced, and the method is more efficient and environment-friendly.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The copper-sulfur separation inhibitor is characterized by comprising the following raw materials: sodium carbonate, ammonium sulfate, calcium chloride, and sodium hydroxide, and no lime;
wherein the mass ratio of the sodium carbonate to the ammonium sulfate to the calcium chloride to the sodium hydroxide is (1-4): (1-4): (1-4): 1.
2. the copper-sulfur separation inhibitor according to claim 1, wherein the mass ratio of sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide is (1.5-3): (1.5-3): (1.5-3): 1, preferably 2: 2: 2: 1.
3. a lime-free copper-sulfur flotation separation method is characterized by comprising the following steps:
(a) providing ore pulp prepared from copper-sulfur raw ore;
adding an inhibitor, a collecting agent and a foaming agent into the ore pulp for roughing to obtain copper roughing concentrate and roughing tailings;
(b) adding an inhibitor into the copper roughing concentrate for fine separation to obtain copper concentrate;
wherein the inhibitor in step (a) and the inhibitor in step (b) are both the copper-sulfur separation inhibitor according to claim 1 or 2; the collecting agent in the step (a) comprises ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether, wherein the mass ratio of the ethionamide to the sodium isobutyl black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is (2-6): (2-6): (1-2): 1.
4. the lime-free copper-sulfur flotation separation method according to claim 3, wherein the amount of the inhibitor used in the step (a) is 80-500g/t calculated by the mass of the inhibitor in the copper-sulfur raw ore.
5. The lime-free copper-sulfur flotation separation method according to claim 3, wherein in the collecting agent in the step (a), the mass ratio of ethionamide, sodium isobutylate, diesel oil and fatty alcohol-polyoxyethylene ether is (2.5-5): (2.5-5): (1-1.8): 1, preferably 4: 4: 1: 1;
preferably, the amount of the collector used in step (a) is 10-60g/t calculated by the mass of the collector in the raw copper-sulfur ore.
6. The lime-free copper-sulfur flotation separation process of claim 3, wherein in step (a), the frother comprises any one of or a combination of at least two of terpineol, isobutanol or methyl isobutyl carbinol;
preferably, the amount of the foaming agent in step (a) is 5-20g/t calculated by the mass of the foaming agent in the raw copper-sulfur ore.
7. The lime-free copper-sulfur flotation separation method according to claim 3, wherein in step (a), at least one rougher flotation is performed;
preferably, the rougher tailings obtained in step (a) are subjected to at least two scavenging;
preferably, the rougher tailings obtained in the step (a) are scavenged twice, collecting agents are added in the scavenging process, and the using amounts of the collecting agents in the scavenging I and the scavenging II are respectively and independently 3-15g/t according to the mass of the collecting agents in the copper-sulfur crude ore;
preferably, the collecting agent added in the scavenging process comprises ethionamide, sodium isobutyl black powder, diesel oil and fatty alcohol-polyoxyethylene ether, and the mass ratio of the ethionamide to the sodium isobutyl black powder to the diesel oil to the fatty alcohol-polyoxyethylene ether is (2-6): (2-6): (1-2): 1.
8. the lime-free copper-sulfur flotation separation method according to any one of claims 3 to 7, wherein in the step (a), the raw copper-sulfur ore is ground and added with water to prepare ore pulp;
preferably, in the step (a), the copper-sulfur raw ore is ground to the fineness of-0.074 mm, which accounts for 50-85%;
preferably, in the step (a), the mass concentration of the ore pulp is 30-45%.
9. The lime-free copper-sulfur flotation separation method according to any one of claims 3 to 7, wherein the amount of the inhibitor used in the step (b) is 10 to 60g/t calculated by the mass of the inhibitor in the copper-sulfur raw ore;
preferably, in step (b), the copper rougher concentrate is beneficiated at least three times;
preferably, in the step (b), the copper rougher concentrate is subjected to three times of concentration, and the dosage of the inhibitor in the concentration I is 5-30g/t, the dosage of the inhibitor in the concentration II is 4-20g/t, and the dosage of the inhibitor in the concentration III is 1-10g/t according to the mass of the inhibitor in the copper sulfur crude ore.
10. Use of the inhibitor for copper sulphur separation according to claim 1 or 2 or the lime-free conditional copper sulphur flotation separation method according to any of claims 3 to 9 in mineral processing.
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