Inhibitor for separating arsenopyrite and pyrite and application
By using sodium glyoxal monosulfonate and chitosan as inhibitors, combining Fe3+ ions on the surface of the poisonous sand to form a complex, the problem of low separation efficiency between pyrote and toxic sand in the prior art was solved, and an efficient and environmentally friendly separation effect was achieved.
Patent Information
- Application Number
- CN202510029309.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-03-18
AI Technical Summary
It is difficult to efficiently separate pyrote from toxic sand in the prior art. The traditional physical separation method is inefficient, and the existing inhibitors in the chemical separation method have poor inhibition effect, so high-purity separation cannot be achieved.
Sodium glyoxal monosulfonate and chitosan are used as separation inhibitors to form a complex with Fe3+ ions on the surface of the toxic sand, thereby preventing the action of collectors, thereby achieving efficient separation of pyrote and toxic sand.
It has achieved efficient separation of iron sulfide minerals and toxic sand. The inhibitor has good inhibitory properties on toxic sand, but has weak inhibitory ability on pyrite. The inhibitor is soluble in water, simple production, easy to industrial application, and environmentally friendly.
Smart Images
Figure CN119634052A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of nonferrous metal recovery, and in particular to an inhibitor for separating arsenopyrite and pyrite and its application. Background Art
[0002] In the field of mineral processing, the separation and purification of ores is a crucial link. Especially when dealing with complex ores containing a variety of useful minerals and impurities, how to efficiently and environmentally separate the target minerals has always been the focus of scientific researchers and technicians. Arsenopyrite (mainly FeAsS) and pyrite (such as pyrite, mainly FeS2) are common minerals. They often coexist in many ores and have similar properties, making separation particularly difficult.
[0003] Traditional separation methods mostly rely on differences in physical properties (such as specific gravity, magnetism, etc.) for separation, but these methods are often inefficient and difficult to achieve high-purity separation effects. Therefore, chemical separation methods have gradually gained attention. Among them, flotation is a commonly used chemical separation method, which uses the differences in mineral surface properties to add chemical reagents such as collectors and frothers to make the target minerals and impurity minerals have different adhesion on the bubbles, thereby achieving separation.
[0004] In the flotation separation process of pyrite and arsenopyrite, butyl xanthate is a commonly used collector, which can effectively combine with metal ions on the surface of pyrite, making pyrite have good flotation properties. However, arsenopyrite and pyrite have certain similarities in chemical properties, resulting in a certain degree of adsorption of butyl xanthate on the surface of arsenopyrite, thereby reducing the separation efficiency.
[0005] In order to solve this problem, researchers have tried to develop various inhibitors to inhibit the flotation of arsenopyrite. The role of the inhibitor is to change its surface properties by binding to specific ions or functional groups on the surface of arsenopyrite, making it no longer suitable for binding with the collector, and thus inhibiting it from floating during the flotation process. However, the existing inhibitors have poor inhibitory effects and cannot achieve efficient separation of iron sulfide minerals and arsenopyrite. Therefore, the present application provides an inhibitor for separating arsenopyrite from pyrite to meet the demand. Summary of the invention
[0006] The purpose of the present application is to provide an inhibitor for separating arsenopyrite from pyrite and its application, wherein the inhibitor can effectively promote the separation of pyrite and arsenopyrite and solve the problem that arsenopyrite is difficult to inhibit during the separation of sulfur and arsenic.
[0007] To achieve the above object, the present application provides the following technical solution: an inhibitor for separating arsenopyrite from pyrite, comprising sodium glyoxal monosulfonate C 2 H 2 O 5SNa and chitosan (C 6 H 13 NO 5 ) n, the mass ratio of sodium glyoxal monosulfonate to chitosan is 1:3-5.
[0008] An inhibitor for separating arsenopyrite from pyrite, comprising sodium glyoxal monosulfonate C 2 H 2 O 5 SNa and chitosan (C 6 H 13 NO 5 ) n, the mass ratio of sodium glyoxal monosulfonate to chitosan is 1:3-5.
[0009] The invention discloses an application of an inhibitor for separating arsenopyrite from pyrite, which is applied to a sulfur-arsenic separation process of pyrite concentrate or a flotation separation process of high-arsenic pyrite gold ore.
[0010] An application of an inhibitor for separating arsenopyrite and pyrite, characterized in that the application comprises the following steps: S1: After grinding, the ore sample is slurried with water at a concentration of 25% to 28%, and ferrous sulfate is added to adjust the slurry; S2: Add butyl xanthate and pine oil to the slurry of S1 for the first roughing to obtain sulfur-arsenic rough concentrate and roughing tailings; S3: adding butyl xanthate and pine oil to the rougher tailings obtained in S2 for the first scavenging to obtain the middling ore 1 and the first scavenging tailings, and the middling ore 1 is returned to the rougher; S4: adding butyl xanthate and pine oil to the first sweep tailings obtained in S3 for the second sweep to obtain the middling ore 2 and flotation tailings, and the middling ore 2 is returned to the first sweep operation; S5: transferring the sulfur-arsenic coarse concentrate obtained in S2 to the first sulfur-arsenic separation flotation machine, adding inhibitors to adjust the slurry; S6: performing sulfur and arsenic separation flotation on the pulp in S5 to obtain pyrite concentrate and arsenic concentrate; S7: If the sulfur grade of the pyrite concentrate does not meet the standard but the sulfur recovery rate meets the standard, water is added to the pyrite concentrate obtained in S5 to adjust the concentration to 16%, and then the pyrite concentrate is transferred to the second sulfur-arsenic separation flotation machine to add inhibitors for slurry adjustment and concentration again to improve the grade of the pyrite concentrate, thereby obtaining a re-concentrated pyrite concentrate and a re-concentrated arsenic concentrate, and the re-concentrated arsenic concentrate is combined with the arsenic concentrate obtained in step S6 to form a total arsenic concentrate.
[0011] As a preferred implementation in this embodiment, in S1, the grinding fineness is -0.074 mm, accounting for 80% to 85%, the slurry pH is 6 to 8, and the amount of ferrous sulfate added is 1000 to 2000 g / t.
[0012] As a preferred implementation in this embodiment, in S1, the collector butyl xanthate is added in an amount of 80-300 g / t, and the foaming agent pine oil is added in an amount of 5-20 g / t; In S2, the collector butyl xanthate is added in an amount of 20-40 g / t, and the foaming agent pine oil is added in an amount of 5-10 g / t; In S3, the collector butyl xanthate is added in an amount of 20-40 g / t, and the foaming agent pine oil is added in an amount of 5-10 g / t.
[0013] As a preferred implementation in this example, the amount of the inhibitor added is 500-2000 g / t.
[0014] As a preferred implementation in this embodiment, in S5, the four walls of the cell body of the first sulfur-arsenic separation flotation machine are all affixed with magnetic linings, and the magnetic field strength of the magnetic linings is 1500Gs; In S7, the four walls of the cell body of the second sulfur-arsenic separation flotation machine are affixed with magnetic linings, and the magnetic field strength of the magnetic linings is 2000 Gs.
[0015] As a preferred implementation manner in this embodiment, a plurality of protrusions with isosceles triangle structures are vertically arranged in rows on the end surface of the magnetic lining plate.
[0016] As a preferred implementation in this embodiment, the plurality of protrusions include a plurality of first protrusions 102 and second protrusions 103 that are alternately arranged at intervals, and a protrusion height of the second protrusion 103 is smaller than a protrusion height of the first protrusion 102 .
[0017] As a preferred implementation in this embodiment, in S7, the amount of inhibitor added in the second concentration is 1 / 3 to 1 / 2 of that in the first concentration.
[0018] In summary, the technical effects and advantages of the present invention are as follows: The invention has a reasonable structure. According to the synergistic effect of the reagents, sodium glyoxal monosulfonate and chitosan are used as inhibitors of arsenopyrite. The inhibitor has good inhibitory performance on arsenopyrite minerals, but weak inhibitory ability on pyrite and pyrrhotite, and can realize efficient separation of iron sulfide minerals and arsenopyrite. In the present invention, the arsenopyrite inhibitor of the present invention is a water-soluble solid powder, which is simple to produce, can be stored for a long time, is easy to industrialize and is more environmentally friendly; In the present invention, the flotation machine cell with a magnetic lining is used to increase the interaction opportunity between arsenopyrite and the inhibitor, to better cooperate with the inhibitor, and to reduce the grade and recovery rate of arsenic in the sulfur concentrate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 This is a process flow chart for separating arsenic and sulfur from sulfur concentrate or high-arsenic sulfur concentrate according to the present invention.
[0021] Figure 2 It is a schematic diagram of the top view of the tank body of the separation flotation machine of the present invention.
[0022] In the figure: 101, magnetic lining; 102, first protrusion; 103, second protrusion; DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] An inhibitor for separating arsenopyrite from pyrite, comprising sodium glyoxal monosulfonate C 2 H 2 O 5 SNa and chitosan (C 6 H 13 NO 5 ) n, the mass ratio of sodium glyoxal monosulfonate to chitosan is 1:3-5.
[0025] In the separation process of pyrite and arsenopyrite, butyl xanthate is often used as a collector. The sulfonic acid group in sodium glyoxal monosulfonate can react with Fe3+ on the surface of arsenopyrite to form a complex, which is firmly attached to the surface of arsenopyrite, preventing the action of butyl xanthate on the surface of arsenopyrite, thereby making the surface of arsenopyrite hydrophilic. Chitosan, a natural high molecular weight polysaccharide, has a large molecular weight, a long molecular chain, and contains a large number of amino and hydroxyl functional groups. It can form a complex with Fe3+ ions on the surface of arsenopyrite, thereby adsorbing on the surface of arsenopyrite. On the other hand, chitosan has good film-forming properties. Chitosan molecules attached to the surface of arsenopyrite will form a dense film, which prevents the collector and bubbles from contacting the arsenopyrite minerals. The inhibitor has good inhibitory performance on arsenopyrite minerals, but weak inhibitory ability on pyrite and pyrrhotite, and can achieve efficient separation of iron sulfide minerals and arsenopyrite. The arsenopyrite inhibitor of the present invention is a water-soluble solid powder, which is simple to produce, can be stored for a long time, and is easy to industrially apply. At the same time, the inhibitor is more environmentally friendly.
[0026] An inhibitor for separating arsenopyrite from pyrite, comprising sodium glyoxal monosulfonate C 2 H 2 O 5 SNa and chitosan (C 6 H 13 NO 5 ) n, the mass ratio of sodium glyoxal monosulfonate to chitosan is 1:3-5.
[0027] The invention discloses an application of an inhibitor for separating arsenopyrite from pyrite, which is applied to a sulfur-arsenic separation process of pyrite concentrate or a flotation separation process of high-arsenic pyrite gold ore.
[0028] An application of an inhibitor for separating arsenopyrite and pyrite, characterized in that the application comprises the following steps: S1: After grinding, the ore sample is slurried with water at a concentration of 25% to 28%, and ferrous sulfate is added to adjust the slurry; S2: Add butyl xanthate and pine oil to the slurry of S1 for the first roughing to obtain sulfur-arsenic rough concentrate and roughing tailings; S3: adding butyl xanthate and pine oil to the rougher tailings obtained in S2 for the first scavenging to obtain the middling ore 1 and the first scavenging tailings, and the middling ore 1 is returned to the rougher; S4: adding butyl xanthate and pine oil to the first sweep tailings obtained in S3 for the second sweep to obtain the middling ore 2 and flotation tailings, and the middling ore 2 is returned to the first sweep operation; S5: transferring the sulfur-arsenic coarse concentrate obtained in S2 to the first sulfur-arsenic separation flotation machine, adding inhibitors to adjust the slurry; S6: performing sulfur and arsenic separation flotation on the pulp in S5 to obtain pyrite concentrate and arsenic concentrate; S7: If the sulfur grade of the pyrite concentrate does not meet the standard but the sulfur recovery rate meets the standard, water is added to the pyrite concentrate obtained in S5 to adjust the concentration to 16%, and then the pyrite concentrate is transferred to the second sulfur-arsenic separation flotation machine to add inhibitors for slurry adjustment and concentration again to improve the grade of the pyrite concentrate, thereby obtaining a re-concentrated pyrite concentrate and a re-concentrated arsenic concentrate, and the re-concentrated arsenic concentrate is combined with the arsenic concentrate obtained in step S6 to form a total arsenic concentrate.
[0029] As a preferred implementation in this embodiment, in S1, the grinding fineness is -0.074 mm, accounting for 80% to 85%, the slurry pH is 6 to 8, and the amount of ferrous sulfate added is 1000 to 2000 g / t.
[0030] As a preferred implementation in this embodiment, in S1, the collector butyl xanthate is added in an amount of 80-300 g / t, and the foaming agent pine oil is added in an amount of 5-20 g / t; In S2, the collector butyl xanthate is added in an amount of 20-40 g / t, and the foaming agent pine oil is added in an amount of 5-10 g / t; In S3, the collector butyl xanthate is added in an amount of 20-40 g / t, and the foaming agent pine oil is added in an amount of 5-10 g / t.
[0031] As a preferred implementation in this example, the amount of the inhibitor added is 500-2000 g / t.
[0032] As a preferred implementation in this embodiment, in S5, the four walls of the cell body of the first sulfur-arsenic separation flotation machine are all affixed with magnetic linings 101, and the magnetic field strength of the magnetic linings 101 is 1500Gs; In the step S7, the four walls of the cell of the second sulfur-arsenic separation flotation machine are affixed with magnetic lining plates 101, and the magnetic field strength of the magnetic lining plates 101 is 2000 Gs.
[0033] Through experimental research, the use of 1500~2000Gs weak magnetic separation magnetic field strength can ensure that the magnetic particles obtain better magnetic field influence in the flotation tank. The concentration of the first concentration is higher than that of the second concentration, and 1500Gs field strength is used to ensure a good recovery rate. Since the concentration of the second concentration is lower at 16%, 2000Gs is used to obtain better magnetic particle effect.
[0034] After the trough of the sulfur-arsenic separation flotation machine is specially designed with a magnetic lining, it works together with the arsenopyrite inhibitor. The weakly magnetic pyrrhotite in the ore is affected by the magnetic field and tends to move toward the wall of the trough, causing a certain degree of disorder in the slurry, thereby increasing the probability of the arsenopyrite and the inhibitor acting together, so that the arsenopyrite is better suppressed. After experimental research, under the action of stirring force, the magnetic field strength below 2000Gs acts on the weakly magnetic pyrrhotite in the slurry, which will only change its original movement trajectory and will not make it adhere to the magnetic lining. When it exceeds 2000Gs, some weakly magnetic pyrrhotite will partially adhere to the magnetic lining, affecting the subsequent separation flotation.
[0035] As a preferred implementation manner in this embodiment, a plurality of protrusions with isosceles triangle structures are vertically arranged in rows on the end surface of the magnetic lining plate 101 .
[0036] The protrusions of the isosceles triangle structure have sharp edges, which will produce stronger shear force and disturbance during the flow of the slurry. This disturbance can more effectively break up the agglomerates in the slurry and make the arsenopyrite more evenly dispersed in the slurry. The sharp edges of the protrusions can also produce tiny eddies and turbulence during the flow of the slurry. These eddies and turbulence help to increase the collision frequency and contact area between the arsenopyrite and the inhibitor, thereby further increasing the probability of the arsenopyrite and the inhibitor acting together, so that the arsenopyrite can be better suppressed.
[0037] As a preferred implementation in this embodiment, the plurality of protrusions include a plurality of first protrusions 102 and second protrusions 103 that are alternately arranged at intervals, and a protrusion height of the second protrusion 103 is smaller than a protrusion height of the first protrusion 102 .
[0038] The different convexities and alternating arrangement make the slurry more disturbed during the flow process. This disturbance helps to disperse the arsenopyrite more fully in the slurry and increase the chance of its collision with the inhibitor. The different protrusions will produce different magnetic field intensities. Such differential magnetic field gradients can cause arsenopyrite to be subjected to more complex magnetic field effects, which is beneficial to the adsorption and reaction of inhibitors on the surface of arsenopyrite. The high protrusion of the first protrusion 102 can provide more adsorption sites, making it easier for the inhibitor to be adsorbed on the surface of the arsenopyrite, while the low protrusion of the second protrusion 103 can reduce the flow resistance of the slurry, making it easier for the slurry to flow in the tank, thereby increasing the contact time between the arsenopyrite and the inhibitor; This design structure can further increase the probability of the arsenopyrite and the inhibitor acting together.
[0039] As a preferred implementation in this embodiment, in S7, the amount of inhibitor added in the second concentration is 1 / 3 to 1 / 2 of that in the first concentration. Example
[0040] This embodiment is an example of the method for separating arsenic and sulfur from high-arsenic and sulfur concentrate according to the present invention, comprising the following steps: The mineral raw material is the gold tailings of a sulfur gold mine in Tongling. It contains 31.33% sulfur, 2.88% arsenic, and 2.17g / t gold. Process mineralogy research shows that the sulfur minerals are mainly pyrrhotite, the crystal form is mainly hexagonal, with weak magnetism, and a small amount of pyrite. The arsenic minerals are mainly arsenopyrite. The gold minerals in the ore are closely related to arsenopyrite. The fineness of the gold tailings is -0.074mm, accounting for 83.3%.
[0041] (1) Activation and slurry adjustment of gold tailings: water was added to the gold tailings to adjust the concentration to 28%, 1500g / t ferrous sulfate was added, and the pH of the pulp was measured to be 7.77 after stirring for 3 minutes. (2) Sulfur-arsenic mixed flotation roughing operation: 220g / t of collector butyl xanthate and 20g / t of frother pine oil were added to the pulp, stirred for 2 minutes, and floated for 8 minutes to obtain sulfur-arsenic rough concentrate and sulfur-arsenic roughing tailings. (3) Two scavenging of sulfur-arsenic roughing tailings: 40g / t of collector butyl xanthate and 10g / t of frother pine oil were added in each scavenging operation, stirred for 2 minutes, and floated for 5 minutes to obtain two sulfur-arsenic scavenging foams, namely sulfur-arsenic first scavenging foam and sulfur-arsenic second scavenging foam, and one scavenging tailings was also obtained. The sulfur-arsenic first scavenging foam was returned to the roughing, and the sulfur-arsenic second scavenging foam was returned to the first scavenging. (4) Sulfur and arsenic separation and selection: Add water to the sulfur and arsenic crude concentrate to adjust the concentration to 22%, transfer it to the sulfur and arsenic separation flotation tank (the magnetic field strength of the tank wall is 1500Gs), and add the inhibitor of the present invention in a total amount of 1000g / t, of which sodium glyoxal monosulfonate is 200g / t and chitosan is 800g / t, and the mass ratio of the two agents is 1:4. Stir for 5 minutes and float for 6 minutes. A sulfur concentrate containing 49.03% sulfur and 0.26% arsenic is obtained, with a sulfur recovery rate of 82.26% and an arsenic recovery rate of only 4.74%; an arsenic concentrate containing 18.91% arsenic and 12.62g / t gold is obtained, with an arsenic recovery rate of 79.17% and a gold recovery rate of 70.14%. Example
[0042] This embodiment is an example of separation of sulfur and arsenic from arsenic-containing sulfur concentrate described in the present invention. The mineral raw material is the tailings after copper and iron selection in a copper mine in Tongling. It contains 23.28% sulfur and 1.77% arsenic. The surface of the product under a microscope shows that the sulfur minerals are mainly pyrrhotite, and there are also some pyrites. Most of the arsenic minerals are arsenopyrite, and some are closely related to pyrite. The fineness of the copper and iron tailings is -0.074mm, accounting for 71.4%.
[0043] Copper and iron tailings grinding operation: The tailings are concentrated to 70% concentration, and a small ball mill is used to grind for 5 minutes to obtain -0.074mm accounting for 84.3%. (2) Activation and slurry adjustment of copper and iron tailings: The tailings are adjusted to a concentration of 25% by adding water, and 1000g / t ferrous sulfate is added. After stirring for 3 minutes, the pH of the slurry is measured to be 6.98. (3) Sulfur and arsenic mixed flotation roughing operation: 80g / t of collector butyl xanthate and 20g / t of frother pine oil are added to the slurry, stirred for 2 minutes, and floated for 6 minutes to obtain sulfur and arsenic rough concentrate and sulfur and arsenic roughing tailings. (4) Two scavenging of sulfur and arsenic roughing tailings: 20 g / t of butyl xanthate collector and 10 g / t of pine oil foaming agent were added in each scavenging operation, stirred for 2 minutes, and floated for 5 minutes, and two portions of sulfur and arsenic scavenging foam were obtained, namely sulfur and arsenic first scavenging foam and sulfur and arsenic second scavenging foam, and one portion of scavenging tailings was obtained. The sulfur and arsenic first scavenging foam was returned to the roughing, and the sulfur and arsenic second scavenging foam was returned to the first scavenging. (5) Sulfur and arsenic separation and first concentration operation: The sulfur and arsenic rough concentrate was adjusted to a concentration of 20% by adding water, and transferred to the sulfur and arsenic separation flotation tank body of the present invention (the magnetic field strength of the tank body wall is 1500 Gs), and the total amount of the inhibitor of the present invention was added 800 g / t, of which sodium glyoxal monosulfonate was 200 g / t and chitosan was 600 g / t, and the mass ratio of the two agents was 1:3. Stirred for 5 minutes and floated for 5 minutes. Pyrite concentrate 1 and arsenic concentrate 1 were obtained. (6) Sulfur and arsenic separation secondary concentration operation: add water to the pyrite concentrate 1 obtained in (5) to adjust the concentration to 16%, replace the tank body with the sulfur and arsenic separation flotation tank body of the present invention (wall magnetic field strength is 2000Gs), add the inhibitor of the present invention in a total amount of 400g / t, of which sodium glyoxal monosulfonate is 100g / t, chitosan is 300g / t, and the mass ratio of the two agents is 1:3. Stir for 5 minutes and float for 4 minutes. Sulfur concentrate 2 and arsenic concentrate 2 are obtained. (7) Arsenic concentrate 1 and arsenic concentrate 2 are combined as arsenic concentrate. Sulfur concentrate 2 is the final sulfur concentrate product, which contains 48.82% sulfur and 0.103% arsenic. Its sulfur recovery rate is 84.13%, and its arsenic recovery rate is only 2.33%. Comparative Example: (1) A comparative test was conducted on the above Example 1. The sulfur-arsenic rough concentrate described in (4) of Example 1 was not transferred to the sulfur-arsenic separation flotation cell, and a common flotation cell was used for the test. The other conditions were the same as those of Example 1. A sulfur concentrate containing 46.63% sulfur and 1.03% arsenic was obtained, with a sulfur recovery rate of 76.88% and an arsenic recovery rate of 18.47%. An arsenic concentrate containing 9.83% arsenic and 5.44 g / t gold was obtained, with an arsenic recovery rate of 50.43% and a gold recovery rate of 34.06%.
[0044] A comparative test was conducted on the above-mentioned Example 2. In Example 2, (5) and (6) were both conducted using a common flotation cell, and the other conditions were the same as those of Example 2. The sulfur concentrate 2 obtained contained 44.15% sulfur and 0.68% arsenic. The sulfur recovery rate was 72.13% and the arsenic recovery rate was 14.61%. Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An inhibitor for separating arsenopyrite from pyrite, characterized in that: Including sodium glyoxal monosulfonate C2H2O5SNa and chitosan (C6H 13 NO5) n, the mass ratio of sodium glyoxal monosulfonate to chitosan is 1:3-5.
2. The use of an inhibitor for separating arsenopyrite and pyrite as claimed in claim 1, characterized in that: It is used in the sulfur-arsenic separation process of pyrite concentrate or the flotation separation process of high-arsenic pyrite gold ore.
3. The use of an inhibitor for separating arsenopyrite and pyrite as claimed in claim 2, characterized in that: Its application includes the following steps: S1: After grinding, the ore sample is slurried with water at a concentration of 25% to 28%, and ferrous sulfate is added to adjust the slurry; S2: Add butyl xanthate and pine oil to the slurry of S1 for the first roughing to obtain sulfur-arsenic rough concentrate and roughing tailings; S3: adding butyl xanthate and pine oil to the rougher tailings obtained in S2 for the first scavenging to obtain the middling ore 1 and the first scavenging tailings, and the middling ore 1 is returned to the rougher; S4: adding butyl xanthate and pine oil to the first sweep tailings obtained in S3 for the second sweep to obtain the middling ore 2 and flotation tailings, and the middling ore 2 is returned to the first sweep operation; S5: transferring the sulfur-arsenic coarse concentrate obtained in S2 to the first sulfur-arsenic separation flotation machine, adding inhibitors to adjust the slurry; S6: performing sulfur and arsenic separation flotation on the pulp in S5 to obtain pyrite concentrate and arsenic concentrate; S7: If the sulfur grade of the pyrite concentrate does not meet the standard but the sulfur recovery rate meets the standard, water is added to the pyrite concentrate obtained in S5 to adjust the concentration to 16%, and then the pyrite concentrate is transferred to the second sulfur-arsenic separation flotation machine to add inhibitors for slurry adjustment and concentration again to improve the grade of the pyrite concentrate, thereby obtaining a re-concentrated pyrite concentrate and a re-concentrated arsenic concentrate, and the re-concentrated arsenic concentrate is combined with the arsenic concentrate obtained in step S6 to form a total arsenic concentrate.
4. The use of an inhibitor for separating arsenopyrite and pyrite according to claim 3, characterized in that: In S1, the grinding fineness is -0.074 mm, accounting for 80% to 85%, the slurry pH is 6 to 8, and the amount of ferrous sulfate added is 1000 to 2000 g / t.
5. The use of an inhibitor for separating arsenopyrite and pyrite according to claim 3, characterized in that: In S1, the collector butyl xanthate is added in an amount of 80-300 g / t, and the foaming agent pine oil is added in an amount of 5-20 g / t; In S2, the collector butyl xanthate is added in an amount of 20-40 g / t, and the foaming agent pine oil is added in an amount of 5-10 g / t; In S3, the collector butyl xanthate is added in an amount of 20-40 g / t, and the foaming agent pine oil is added in an amount of 5-10 g / t.
6. The use of an inhibitor for separating arsenopyrite and pyrite according to claim 3, characterized in that: The amount of the inhibitor added is 500-2000 g / t.
7. The use of an inhibitor for separating arsenopyrite and pyrite according to claim 3, characterized in that: In S5, the four walls of the cell body of the first sulfur-arsenic separation flotation machine are all affixed with magnetic lining plates (101), and the magnetic field strength of the magnetic lining plates (101) is 1500 Gs; In S7, the four walls of the cell body of the second sulfur-arsenic separation flotation machine are affixed with magnetic lining plates (101), and the magnetic field strength of the magnetic lining plates (101) is 2000 Gs.
8. The use of an inhibitor for separating arsenopyrite and pyrite according to claim 7, characterized in that: A plurality of protrusions with isosceles triangle structures are arranged vertically and in rows on the end surface of the magnetic lining plate (101).
9. The use of an inhibitor for separating arsenopyrite and pyrite according to claim 8, characterized in that: The plurality of protrusions include a plurality of first protrusions (102) and second protrusions (103) that are alternately arranged at intervals, and the protrusion height of the second protrusions (103) is smaller than the protrusion height of the first protrusions (102).
10. The use of an inhibitor for separating arsenopyrite and pyrite according to claim 3, characterized in that: In S7, the amount of the inhibitor added in the second concentration is 1 / 3 to 1 / 2 of that in the first concentration.