A method for the action of kerosene and lime in the concentration of sulfide ore

Abstract

The present invention discloses a method for the action of kerosene and lime in sulfide ore selection, comprising the following steps: transferring an ore sample to a flotation tank for treatment by adding a treatment agent; stirring and slurrying for rough selection of molybdenum-bismuth-sulfur separation to obtain a rough mixed concentrate of molybdenum-bismuth and a roughing tailing; performing two blank sweeps on the roughing tailing, returning the scavenged concentrate of scavenged 1 to the roughing, and returning the scavenged concentrate of scavenged 2 to scavenged 1 to obtain a sulfur concentrate. The present invention generally uses lime as a sulfur inhibitor and a large amount of the usage when the concentrate obtained by the full flotation concentrate is subjected to desulfurization operation. At this time, the viscosity of the foam is relatively large and it is easy to expand the groove. Adding a small amount of kerosene in the roughing or selection can effectively change the viscosity of the foam and then change the state of the foam to stabilize the operation, solve the problem of unstable operation of expanding the groove in the desulfurization of sulfide ore selection lime, ensure that a stable concentrate product is obtained, reduce the cost of reagents, reduce the labor intensity of employees, and provide reference significance for the same type of phenomenon.

Description

Technical Field

[0001] The invention relates to the technical field of sulfide ore concentration, and in particular to a method for the action of kerosene and lime in the concentration of sulfide ore. Background Art

[0002] In addition to its collecting properties, kerosene also has defoaming and stabilizing properties in flotation. Lime is the most commonly used and cheapest inhibitor for desulfurization of sulfide ores, and a large amount is generally used to obtain the required concentrate indicators. In some sulfide ores, a large amount of lime will cause the foam to be more viscous, which will cause the trough to expand and make the process separation worse, thus affecting the separation indicators. Adding an appropriate amount of kerosene to this viscous foam is beneficial to increase the brittleness of the foam, thereby improving the state of the foam and achieving the purpose of efficient separation.

[0003] Based on this, the present invention provides a method for the action of kerosene and lime in the concentration of sulfide ore. Summary of the invention

[0004] In view of the defects of the prior art, the object of the present invention is to provide a method for the action of kerosene and lime in the beneficiation of sulfide ores to solve the problems raised in the above-mentioned background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] The present invention provides a method for the action of kerosene and lime in the beneficiation of sulfide ore, comprising the following steps:

[0007] Step 1: Transfer the ore sample to the flotation tank and add the treatment agent for treatment;

[0008] Step 2: stirring and slurrying to carry out rough separation of molybdenum, bismuth and sulfur to obtain rough molybdenum, bismuth and coarse mixed concentrate and rough tailings;

[0009] Step 3: The roughing tailings are subjected to two blank sweeps, the concentrate from sweep 1 is returned to the roughing, and the concentrate from sweep 2 is returned to sweep 1 to obtain sulfur concentrate;

[0010] Step 4: The molybdenum-bismuth mixed rough concentrate obtained by roughing is subjected to three rounds of fine cleaning to obtain the most molybdenum-bismuth mixed concentrate. The intermediate ore of concentrate 1 is returned to the roughing, the intermediate ore of concentrate 2 is returned to concentrate 1, and the intermediate ore of concentrate 3 is returned to concentrate 2.

[0011] Preferably, the mass fraction of -0.074 mm of the ore sample accounts for 80.94-85.65%.

[0012] Preferably, the treatment agent is 38 kg / t of lime, 30 g / t of kerosene, and 2 kg / t of inhibitor; or 4.5 kg / t of activated carbon, 20 kg / t of lime, and 2 kg / t of inhibitor; and the collector is 0.4 kg / t of ethyl dithiocarbamide.

[0013] Preferably, the preparation method of the inhibitor is:

[0014] S01: Add 5-10 parts of tartaric acid to 10-20 parts of chitosan aqueous solution, then add 5-9 parts of sodium alginate, and stir to mix evenly;

[0015] S02: Then, 1-5 parts of sodium oxalate are added to 5-10 parts of silane coupling agent KH560, and then 2-4 parts of modified nanographene are added, and stirred and mixed thoroughly;

[0016] S03: Finally, the S01 product is added to the S02 product, and the reaction is stirred to obtain an inhibitor.

[0017] Preferably, the preparation method of the modified nano-graphene is: adding nano-graphene to a hydrochloric acid solution at a weight ratio of 1:5, ultrasonically dispersing, washing with water, drying, and finally calcining at 550-650° C. for 10-20 min. After the calcination is completed, cooling to room temperature is performed to obtain the modified nano-graphene.

[0018] Preferably, the rotation speed of the stirring reaction treatment is 550-750 r / min, and the stirring time is 20-30 min.

[0019] Preferably, the amount of lime used in refined 1 is 9-10 kg / t, the inhibitor is 1 kg / t, the amount of lime used in refined 2 is 5 kg / t, the inhibitor is 0.5 kg / t, and refined 3 is blank.

[0020] The beneficial effect of the present invention is that when the concentrate obtained from the whole flotation concentrate is subjected to desulfurization operation, lime is generally used as a sulfur inhibitor and the amount used is generally large. At this time, the viscosity of the foam is relatively large and it is easy to expand the groove. Adding a small amount of kerosene during roughing or fine selection can effectively change the viscosity of the foam and then change the state of the foam to stabilize the operation, solve the problem of unstable expansion operation in the desulfurization of sulfide ore selected lime, ensure that a stable concentrate product is obtained, reduce the cost of reagents, and reduce the labor intensity of employees, which can provide reference significance for similar phenomena. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0022] 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.

[0023] The method of using kerosene and lime in the concentration of sulfide ore in this embodiment comprises the following steps:

[0024] Step 1: Transfer the ore sample to the flotation tank and add the treatment agent for treatment;

[0025] Step 2: stirring and slurrying to carry out rough separation of molybdenum, bismuth and sulfur to obtain rough molybdenum, bismuth and coarse mixed concentrate and rough tailings;

[0026] Step 3: The roughing tailings are subjected to two blank sweeps, the concentrate from sweep 1 is returned to the roughing, and the concentrate from sweep 2 is returned to sweep 1 to obtain sulfur concentrate;

[0027] Step 4: The molybdenum-bismuth mixed rough concentrate obtained by roughing is subjected to three rounds of fine cleaning to obtain the most molybdenum-bismuth mixed concentrate. The intermediate ore of concentrate 1 is returned to the roughing, the intermediate ore of concentrate 2 is returned to concentrate 1, and the intermediate ore of concentrate 3 is returned to concentrate 2.

[0028] The mass fraction of the ore sample -0.074 mm in this embodiment accounts for 80.94-85.65%.

[0029] The treatment agent of this embodiment is 38kg / t of lime, 30g / t of kerosene, and 2kg / t of inhibitor; or 4.5kg / t of activated carbon, 20kg / t of lime, and 2kg / t of inhibitor; and 0.4kg / t of ethyl dithiocarbamide as the collector.

[0030] The preparation method of the inhibitor of this embodiment is:

[0031] S01: Add 5-10 parts of tartaric acid to 10-20 parts of chitosan aqueous solution, then add 5-9 parts of sodium alginate, and stir to mix evenly;

[0032] S02: Then, 1-5 parts of sodium oxalate are added to 5-10 parts of silane coupling agent KH560, and then 2-4 parts of modified nanographene are added, and stirred and mixed thoroughly;

[0033] S03: Finally, the S01 product is added to the S02 product, and the reaction is stirred to obtain an inhibitor.

[0034] The preparation method of the modified nano-graphene of this embodiment is as follows: adding nano-graphene to a hydrochloric acid solution at a weight ratio of 1:5, ultrasonically dispersing, washing with water, drying, and finally calcining at 550-650° C. for 10-20 min. After the calcination is completed, cooling to room temperature is performed to obtain modified nano-graphene.

[0035] The rotation speed of the stirring reaction treatment in this embodiment is 550-750r / min, and the stirring time is 20-30min.

[0036] The lime dosage of fine 1 in the present embodiment is 9-10kg / t, the inhibitor is 1kg / t, the lime dosage of fine 2 is 5kg / t, the inhibitor is 0.5kg / t, and the fine 3 is blank.

[0037] Embodiment 1:

[0038] The method of using kerosene and lime in the concentration of sulfide ore in this embodiment comprises the following steps:

[0039] Step 1: Transfer the ore sample to the flotation tank and add the treatment agent for treatment;

[0040] Step 2: stirring and slurrying to carry out rough separation of molybdenum, bismuth and sulfur to obtain rough molybdenum, bismuth and coarse mixed concentrate and rough tailings;

[0041] Step 3: The roughing tailings are subjected to two blank sweeps, the concentrate from sweep 1 is returned to the roughing, and the concentrate from sweep 2 is returned to sweep 1 to obtain sulfur concentrate;

[0042] Step 4: The molybdenum-bismuth mixed rough concentrate obtained by roughing is subjected to three rounds of fine cleaning to obtain the most molybdenum-bismuth mixed concentrate. The intermediate ore of concentrate 1 is returned to the roughing, the intermediate ore of concentrate 2 is returned to concentrate 1, and the intermediate ore of concentrate 3 is returned to concentrate 2.

[0043] The mass fraction of the ore sample -0.074 mm in this embodiment accounts for 80.94%.

[0044] The treatment agent of this embodiment is 38kg / t of lime, 30g / t of kerosene, and 2kg / t of inhibitor; or 4.5kg / t of activated carbon, 20kg / t of lime, and 2kg / t of inhibitor; and 0.4kg / t of ethyl dithiocarbamide as the collector.

[0045] The preparation method of the inhibitor of this embodiment is:

[0046] S01: Add 5 parts of tartaric acid to 10 parts of chitosan aqueous solution, then add 5 parts of sodium alginate, and stir to mix well;

[0047] S02: Then, add 1 part of sodium oxalate to 5 parts of silane coupling agent KH560, and then add 2-4 parts of modified nanographene, and stir and mix thoroughly;

[0048] S03: Finally, the S01 product is added to the S02 product, and the reaction is stirred to obtain an inhibitor.

[0049] The preparation method of the modified nano-graphene of this embodiment is as follows: adding nano-graphene to a hydrochloric acid solution at a weight ratio of 1:5, ultrasonically dispersing, washing with water, drying, and finally calcining at 550° C. for 10 min. After the calcination is completed, cooling to room temperature is performed to obtain modified nano-graphene.

[0050] The stirring reaction process in this embodiment has a rotation speed of 550 r / min and a stirring time of 20 min.

[0051] The lime dosage of fine 1 in the present embodiment is 9kg / t, the inhibitor is 1kg / t, the lime dosage of fine 2 is 5kg / t, the inhibitor is 0.5kg / t, and the fine 3 is blank.

[0052] Embodiment 2:

[0053] The method of using kerosene and lime in the concentration of sulfide ore in this embodiment comprises the following steps:

[0054] Step 1: Transfer the ore sample to the flotation tank and add the treatment agent for treatment;

[0055] Step 2: stirring and slurrying to carry out rough separation of molybdenum, bismuth and sulfur to obtain rough molybdenum, bismuth and coarse mixed concentrate and rough tailings;

[0056] Step 3: The roughing tailings are subjected to two blank sweeps, the concentrate from sweep 1 is returned to the roughing, and the concentrate from sweep 2 is returned to sweep 1 to obtain sulfur concentrate;

[0057] Step 4: The molybdenum-bismuth mixed rough concentrate obtained by roughing is subjected to three rounds of fine cleaning to obtain the most molybdenum-bismuth mixed concentrate. The intermediate ore of concentrate 1 is returned to the roughing, the intermediate ore of concentrate 2 is returned to concentrate 1, and the intermediate ore of concentrate 3 is returned to concentrate 2.

[0058] The mass fraction of the ore sample -0.074 mm in this embodiment accounts for 85.65%.

[0059] The treatment agent of this embodiment is 38kg / t of lime, 30g / t of kerosene, and 2kg / t of inhibitor; or 4.5kg / t of activated carbon, 20kg / t of lime, and 2kg / t of inhibitor; and 0.4kg / t of ethyl dithiocarbamide as the collector.

[0060] The preparation method of the inhibitor of this embodiment is:

[0061] S01: Add 10 parts of tartaric acid to 20 parts of chitosan aqueous solution, then add 9 parts of sodium alginate, and stir to mix evenly;

[0062] S02: Then, 5 parts of sodium oxalate are added to 10 parts of silane coupling agent KH560, and then 4 parts of modified nanographene are added, and stirred and mixed thoroughly;

[0063] S03: Finally, the S01 product is added to the S02 product, and the reaction is stirred to obtain an inhibitor.

[0064] The preparation method of the modified nano-graphene of this embodiment is as follows: adding nano-graphene to a hydrochloric acid solution at a weight ratio of 1:5, ultrasonically dispersing, washing with water, drying, and finally calcining at 650° C. for 20 min. After the calcination is completed, cooling to room temperature is performed to obtain modified nano-graphene.

[0065] The stirring reaction process in this embodiment has a rotation speed of 750 r / min and a stirring time of 30 min.

[0066] The lime dosage of fine 1 of the present embodiment is 10kg / t, the inhibitor is 1kg / t, the lime dosage of fine 2 is 5kg / t, the inhibitor is 0.5kg / t, and the fine 3 is blank.

[0067] Embodiment 3:

[0068] The method of using kerosene and lime in the concentration of sulfide ore in this embodiment comprises the following steps:

[0069] Step 1: Transfer the ore sample to the flotation tank and add the treatment agent for treatment;

[0070] Step 2: stirring and slurrying to carry out rough separation of molybdenum, bismuth and sulfur to obtain rough molybdenum, bismuth and coarse mixed concentrate and rough tailings;

[0071] Step 3: The roughing tailings are subjected to two blank sweeps, the concentrate from sweep 1 is returned to the roughing, and the concentrate from sweep 2 is returned to sweep 1 to obtain sulfur concentrate;

[0072] Step 4: The molybdenum-bismuth mixed rough concentrate obtained by roughing is subjected to three rounds of fine cleaning to obtain the most molybdenum-bismuth mixed concentrate. The intermediate ore of concentrate 1 is returned to the roughing, the intermediate ore of concentrate 2 is returned to concentrate 1, and the intermediate ore of concentrate 3 is returned to concentrate 2.

[0073] The mass fraction of the ore sample -0.074 mm in this embodiment accounts for 83.45%.

[0074] The treatment agent of this embodiment is 38kg / t of lime, 30g / t of kerosene, and 2kg / t of inhibitor; or 4.5kg / t of activated carbon, 20kg / t of lime, and 2kg / t of inhibitor; and 0.4kg / t of ethyl dithiocarbamide as the collector.

[0075] The preparation method of the inhibitor of this embodiment is:

[0076] S01: Add 7.5 parts of tartaric acid to 15 parts of chitosan aqueous solution, then add 7 parts of sodium alginate, and stir to mix well;

[0077] S02: Then, 3 parts of sodium oxalate are added to 7.5 parts of silane coupling agent KH560, and then 3 parts of modified nanographene are added, and stirred and mixed thoroughly;

[0078] S03: Finally, the S01 product is added to the S02 product, and the reaction is stirred to obtain an inhibitor.

[0079] The preparation method of the modified nano-graphene of this embodiment is as follows: adding nano-graphene to a hydrochloric acid solution at a weight ratio of 1:5, ultrasonically dispersing, washing with water, drying, and finally calcining at 600° C. for 15 min. After the calcination is completed, cooling to room temperature is performed to obtain modified nano-graphene.

[0080] The rotation speed of the stirring reaction treatment in this embodiment is 600 r / min, and the stirring time is 25 min.

[0081] The lime dosage of fine 1 of the present embodiment is 9.5kg / t, the inhibitor is 1kg / t, the lime dosage of fine 2 is 5kg / t, the inhibitor is 0.5kg / t, and the fine 3 is blank.

[0082] Embodiment 4:

[0083] The method of using kerosene and lime in the concentration of sulfide ore in this embodiment comprises the following steps:

[0084] Step 1: Transfer the ore sample to the flotation tank and add the treatment agent for treatment;

[0085] Step 2: stirring and slurrying to carry out rough separation of molybdenum, bismuth and sulfur to obtain rough molybdenum, bismuth and coarse mixed concentrate and rough tailings;

[0086] Step 3: The roughing tailings are subjected to two blank sweeps, the concentrate from sweep 1 is returned to the roughing, and the concentrate from sweep 2 is returned to sweep 1 to obtain sulfur concentrate;

[0087] Step 4: The molybdenum-bismuth mixed rough concentrate obtained by roughing is subjected to three rounds of fine cleaning to obtain the most molybdenum-bismuth mixed concentrate. The intermediate ore of concentrate 1 is returned to the roughing, the intermediate ore of concentrate 2 is returned to concentrate 1, and the intermediate ore of concentrate 3 is returned to concentrate 2.

[0088] The mass fraction of the ore sample -0.074 mm in this embodiment accounts for 82.25%.

[0089] The treatment agent of this embodiment is 38kg / t of lime, 30g / t of kerosene, and 2kg / t of inhibitor; or 4.5kg / t of activated carbon, 20kg / t of lime, and 2kg / t of inhibitor; and 0.4kg / t of ethyl dithiocarbamide as the collector.

[0090] The preparation method of the inhibitor of this embodiment is:

[0091] S01: Add 6 parts of tartaric acid to 12 parts of chitosan aqueous solution, then add 6 parts of sodium alginate, and stir to mix well;

[0092] S02: Then, 2 parts of sodium oxalate are added to 6 parts of silane coupling agent KH560, and then 3 parts of modified nanographene are added, and stirred and mixed thoroughly;

[0093] S03: Finally, the S01 product is added to the S02 product, and the reaction is stirred to obtain an inhibitor.

[0094] The preparation method of the modified nano-graphene of this embodiment is as follows: adding nano-graphene to a hydrochloric acid solution at a weight ratio of 1:5, ultrasonically dispersing, washing with water, drying, and finally calcining at 560° C. for 12 min. After the calcination is completed, cooling to room temperature is performed to obtain modified nano-graphene.

[0095] The stirring reaction process in this embodiment has a rotation speed of 570 r / min and a stirring time of 22 min.

[0096] The lime dosage of fine 1 in the present embodiment is 9.2kg / t, the inhibitor is 1kg / t, the lime dosage of fine 2 is 5kg / t, the inhibitor is 0.5kg / t, and the fine 3 is blank.

[0097] Application Case 1:

[0098] The molybdenum, bismuth and sulfur full flotation concentrate contains 1.31% molybdenum, 3.12% bismuth and 35.41% sulfur. The metal minerals in the ore sample are mainly pyrite, molybdenite, bismuthite, tungsten ore, etc. The non-metallic minerals are mainly quartz, garnet, mica, fluorite, etc. The mass fraction of the ore sample -0.074mm accounts for 85.65%. The ore sample is transferred to the flotation tank for adding 38kg / t lime, 30g / t kerosene and 2kg / t inhibitor, stirring and slurrying for molybdenum, bismuth and sulfur separation and roughing to obtain molybdenum, bismuth and roughing tailings. The roughing tailings are subjected to two blank sweeps, the sweep 1 concentrate is returned to the roughing, and the sweep 2 concentrate is returned to the sweep 1 to obtain the sulfur concentrate. The molybdenum-bismuth mixed rough concentrate obtained from the roughing is subjected to three rounds of fine cleaning to obtain the most molybdenum-bismuth mixed concentrate. The lime dosage for concentrate 1 is 10kg / t, and the inhibitor is 1kg / t. The lime dosage for concentrate 2 is 5kg / t, and the inhibitor is 0.5kg / t. Concentrate 3 is blank. The middlings from concentrate 1 are returned to the roughing, the middlings from concentrate 2 are returned to concentrate 1, and the middlings from concentrate 3 are returned to concentrate 2.

[0099] Table 1 Ore dressing test results are shown in the following table, flotation test indicators (wt%)

[0100]

[0101] Application Case 2:

[0102] A floating molybdenum tailings contains 3.72% bismuth and 33.87% sulfur. The metal minerals in the ore sample are mainly pyrite, bismuthinite, molybdenite, galena, sphalerite, etc., and the non-metallic minerals are mainly quartz, garnet, calcite, fluorite, etc. The mass fraction of the ore sample -0.074mm accounts for 80.94%. The ore sample is transferred to the flotation tank for roughing, adding 4.5kg / t of activated carbon, 20kg / t of lime, 2kg / t of inhibitor, 0.4kg / t of collector ethyl thiocyanate, stirring and slurrying for roughing, and roughing bismuth concentrate and roughing tailings are obtained. The roughing tailings are subjected to sweep 1 operation and the collector ethyl thiocyanate is added 0.2kg / t. The sweep 1 tailings are subjected to blank sweep 2 operation to obtain the final tailings, namely sulfur concentrate. The sweep 1 concentrate is returned to the roughing, and the sweep 2 concentrate is returned to the sweep 1. The bismuth rougher concentrate obtained from the roughing is subjected to the refinement 1 operation and lime 8kg / t and inhibitor 1kg / t are added, the refinement 1 concentrate is subjected to the refinement 2 operation and lime 5kg / t and inhibitor 0.5kg / t are added, the refinement 2 concentrate is subjected to the blank refinement 3 operation to obtain the final bismuth concentrate, the refinement 1 middlings are returned to the roughing, the refinement 2 middlings are returned to the refinement 1, and the refinement 3 middlings are returned to the refinement 2.

[0103] Table 2 Ore dressing test results are shown in the following table, flotation test indicators (wt%)

[0104]

[0105] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to describe the embodiments in the claims according to the embodiments, but not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for the action of kerosene and lime in the beneficiation of sulfide ores, characterized in that: The following steps are involved: Step 1: Transfer the ore sample to the flotation tank and add the treatment agent for treatment; Step 2: stirring and slurrying to carry out rough separation of molybdenum, bismuth and sulfur to obtain rough molybdenum, bismuth and coarse mixed concentrate and rough tailings; Step 3: The roughing tailings are subjected to two blank sweeps, the concentrate from sweep 1 is returned to the roughing, and the concentrate from sweep 2 is returned to sweep 1 to obtain sulfur concentrate; Step 4: The molybdenum-bismuth mixed rough concentrate obtained by roughing is subjected to three rounds of concentrating to obtain the most molybdenum-bismuth mixed concentrate, the concentrate 1 intermediate ore is returned to the roughing, the concentrate 2 intermediate ore is returned to the concentrate 1, and the concentrate 3 intermediate ore is returned to the concentrate 2; The mass fraction of the ore sample -0.074 mm accounts for 80.94-85.65%; The treatment agent is 38kg / t lime, 30g / t kerosene, 2kg / t inhibitor; or 4.5kg / t activated carbon, 20kg / t lime, 2kg / t inhibitor; collector 0.4kg / t ethyl thiocyanate; The preparation method of the inhibitor is: S01: Add 5-10 parts of tartaric acid to 10-20 parts of chitosan aqueous solution, then add 5-9 parts of sodium alginate, and stir to mix evenly; S02: Then, 1-5 parts of sodium oxalate are added to 5-10 parts of silane coupling agent KH560, and then 2-4 parts of modified nanographene are added, and stirred and mixed thoroughly; S03: Finally, the S01 product is added to the S02 product, and the reaction is stirred to obtain an inhibitor.

2. The method for the action of kerosene and lime in the beneficiation of sulfide ores according to claim 1, characterized in that: The preparation method of the modified nanographene is as follows: adding the nanographene into a hydrochloric acid solution at a weight ratio of 1:5, ultrasonically dispersing, washing with water, drying, and finally calcining at 550-650° C. for 10-20 min. After the calcination is completed, cooling to room temperature is performed to obtain the modified nanographene.

3. The method for the action of kerosene and lime in the beneficiation of sulfide ores according to claim 1, characterized in that: The rotation speed of the stirring reaction treatment is 550-750r / min, and the stirring time is 20-30min.

4. The method for the action of kerosene and lime in the beneficiation of sulfide ores according to claim 1, characterized in that: The lime dosage of refined 1 is 9-10kg / t, the inhibitor is 1kg / t, the lime dosage of refined 2 is 5kg / t, the inhibitor is 0.5kg / t, and refined 3 is blank.

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