A full-size flotation method for argillaceous zinc oxide ore

Abstract

The present application relates to a kind of whole particle size flotation method of argillaceous zinc oxide ore, belong to mineral processing technical field.For argillaceous zinc oxide ore when adopting desliming flotation process, zinc mineral loss is serious, middling recycling amount is large and separation index is poor when not desliming flotation, etc.Problems, the present application starts from the idea of grinding, slurry conditioning, the whole process integration regulation and control of capture, by developing flotation reagent to the surface properties of mineral and the selective regulation and control of pulp solution environment, so that argillaceous zinc oxide ore realizes the efficient flotation of different particle size of zinc oxide mineral under the condition of not desliming.By combination modifier, the grinding performance, dispersion behavior and particle size composition of ore are improved, to create the precondition for the whole particle size flotation of argillaceous zinc oxide ore;The combined use of combined depressor and combined collector selectively strengthens the hydrophobicity of zinc oxide mineral surface, increases the floatability difference between zinc oxide mineral and gangue mineral, effectively improves the flotation foam performance and ore carrying effect, realizes the whole particle size recovery of argillaceous zinc oxide ore.

Description

TECHNICAL FIELD

[0001] The present application relates to a full particle size flotation method of argillaceous zinc oxide ore, and belongs to the technical field of mineral processing. BACKGROUND

[0002] Zinc is widely used in corrosion protection, battery manufacturing, electrical equipment, precision casting, defense industry and other fields. Zinc oxide mineral is an important source of zinc metal extraction, but due to the strong hydrophilicity of the surface of zinc oxide mineral, the high content of soluble salt in the ore, the complex inlay relationship with gangue minerals, and the fact that the zinc oxide ore often contains a large amount of primary slime, and secondary slime is also produced in the process of mining, transportation, crushing and grinding, it is difficult to efficiently recover it by using conventional beneficiation methods.

[0003] Amine sulfide flotation is an effective method for separating and enriching zinc oxide minerals, but amine collectors are extremely sensitive to slime. This is because the slime consumes a large amount of positively charged amine collectors, and also adheres to the surface of various minerals, causing the collector to not selectively react with zinc oxide minerals. At the same time, these amine-attached slimes also adhere to the mineralized foam, causing the flotation foam to be "armored" by the combination of slimes and amine collectors, resulting in long-lived and stable flotation foam. This not only increases the amount of middlings, but also makes the flowability of the loaded foam extremely poor and difficult to eliminate, causing the "run-off" phenomenon to be serious, ultimately making the flotation process difficult to control and production difficult to carry out. Although good flotation indicators can be obtained after desliming, there are a large amount of fine-grained zinc oxide minerals in the removed slimes, and existing processes and technologies cannot effectively recover them, resulting in serious zinc metal loss, which greatly affects the large-scale application of amine sulfide flotation in zinc oxide beneficiation plants.

[0004] Therefore, it is urgent to develop a full particle size flotation method for argillaceous zinc oxide ore, so as to economically and efficiently float and recover zinc oxide ore resources without desliming. SUMMARY

[0005] In view of the problem of serious loss of zinc minerals when using desliming flotation process for argillaceous zinc oxide ore, and large amount of middlings circulation and poor separation index when not desliming, the present application proposes a full particle size flotation method for argillaceous zinc oxide ore. Starting from the idea of integrated regulation and control of grinding, slurry preparation and collection, the new flotation reagent is developed to selectively regulate the surface properties of the mineral and the solution environment of the slurry, so that the argillaceous zinc oxide ore can be efficiently floated without desliming.

[0006] A full particle size flotation method for argillaceous zinc oxide ore, the specific steps are as follows:

[0007] (1) mixing argillaceous zinc oxide ore with combined conditioning agent, then grinding to separate the zinc oxide mineral monomer, adding water to adjust the pulp mass percentage concentration to 24-38%, to obtain argillaceous zinc oxide ore slurry;

[0008] (2) adding sodium sulfide, combined depressant and combined collector into the slurry obtained in step (1) in turn, to carry out primary roughing to obtain primary roughing concentrate and primary roughing tailings;

[0009] (3) adding sodium sulfide, combined depressant and combined collector into the primary roughing tailings obtained in step (2) in turn, to carry out secondary roughing to obtain secondary roughing concentrate and secondary roughing tailings;

[0010] (4) adding combined depressant and combined collector into the secondary roughing tailings obtained in step (3) in turn, to carry out scavenging to obtain scavenging concentrate and zinc flotation tailings;

[0011] (5) combining the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) to carry out cleaning to obtain zinc flotation concentrate and cleaning tailings, wherein the cleaning tailings and the scavenging concentrate obtained in step (4) are combined to return to the slurry and enter the secondary roughing;

[0012] The combined conditioning agent is a mixture of triethanolamine, triisopropanolamine and dodecyl benzene, the combined depressant is a mixture of water glass, aminotri-methylene phosphonic acid and phosphonocarboxylic acid copolymer, and the combined collector is a mixture of dodecyl amine acetate, dioctyl sulfonate sodium succinate and peregal O-25.

[0013] Preferably, the mass percentage content of zinc in the argillaceous zinc oxide ore in step (1) is 4.2-8.6%.

[0014] Preferably, the combined conditioning agent is added in an amount of 300-700 g per ton of argillaceous zinc oxide ore in step (1).

[0015] Preferably, sodium sulfide 6-10 kg, combined depressant 1600-2400 g and combined collector 280-440 g are added per ton of argillaceous zinc oxide ore in the slurry in step (2).

[0016] Preferably, sodium sulfide 1.5-2.5 kg, combined depressant 400-600 g and combined collector 70-110 g are added per ton of argillaceous zinc oxide ore in the slurry in step (3).

[0017] Preferably, combined depressant 200-300 g and combined collector 35-55 g are added per ton of argillaceous zinc oxide ore in the slurry in step (4).

[0018] Preferably, the triethanolamine accounts for 45-65%, the triisopropanolamine accounts for 25-35%, and the mixture of dodecylbenzene accounts for 10-20% in the combined modifier, with the mass fraction being 100%.

[0019] Preferably, the water glass accounts for 55-75%, the aminotrimethylenephosphonic acid accounts for 15-25%, and the phosphonocarboxylic acid copolymer accounts for 10-20% in the combined inhibitor, with the mass fraction being 100%.

[0020] Preferably, the dodecylamine acetate accounts for 40-60%, the dioctyl sulfosuccinate sodium accounts for 30-40%, and the peregal O-25 accounts for 10-20% in the combined collector, with the mass fraction being 100%.

[0021] The present application has the following beneficial effects:

[0022] (1) The present application is based on the idea of integrated control of grinding, pulp conditioning and collection. By developing new flotation reagents, the surface properties of minerals and the solution environment of the ore pulp are selectively controlled, and the problems of serious loss of zinc minerals when using desliming flotation process, large amount of middling circulation and poor separation indexes when using non-desliming flotation process are economically and efficiently solved, and the full-size flotation recovery of the oxidized zinc ore is realized.

[0023] (2) The present application controls the surface energy based on the interaction between the polar groups of the combined modifier and the surface of the ore particles, which not only reduces the surface hardness and compressive strength of the oxidized zinc ore particles, but also weakens the agglomeration between the ore particles and their adhesion to the mill liner and grinding media, effectively improving the grinding performance, dispersion behavior and particle size composition of the ore, and creating favorable conditions for the full-size flotation of the oxidized zinc ore.

[0024] (3) The combined use of the combined inhibitor and the combined collector not only selectively enhances the hydrophobicity of the oxidized zinc mineral surface and increases the floatability difference between the oxidized zinc minerals and the gangue minerals, but also optimizes the flotation foam structure and the ore carrying capacity, solves the problems of bubble control and mud suppression in the flotation process of the oxidized zinc ore, and opens up a new way for the efficient separation and enrichment of the complex and refractory oxidized zinc ore. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The process flow chart of the present application is shown in the figure. DETAILED DESCRIPTION

[0026] The present application will be further described in detail in conjunction with the specific embodiments, but the scope of protection of the present application is not limited to the described content.

[0027] The combination regulator in the following examples of the present application is a mixture of triethanolamine, triisopropanolamine and dodecyl benzene, the combination inhibitor is a mixture of water glass, aminotrimethylene phosphonic acid and phosphono carboxylic acid copolymer, and the combination collector is a mixture of dodecyl amine acetate, dioctyl sulfonate sodium succinate and peregal O-25.

[0028] Example 1: In this example, the mass fraction of the combination regulator is 100%, the mixture of triethanolamine accounts for 45%, triisopropanolamine accounts for 35%, and dodecyl benzene accounts for 20%; the mass fraction of the combination inhibitor is 100%, water glass accounts for 55%, aminotrimethylene phosphonic acid accounts for 25%, and phosphono carboxylic acid copolymer accounts for 20%; the mass fraction of the combination collector is 100%, dodecyl amine acetate accounts for 40%, dioctyl sulfonate sodium succinate accounts for 40%, and peregal O-25 accounts for 20%;

[0029] As shown in Figure 1 , a full particle size flotation method for argillaceous oxidized zinc ore, the specific steps are as follows:

[0030] (1) Mix the argillaceous oxidized zinc ore with the combination regulator, then add it to the ball mill for grinding to the single mineral dissociation of the oxidized zinc ore, and add water to adjust the pulp mass percentage concentration to 24% to obtain the argillaceous oxidized zinc ore slurry; the combination regulator is added to the ball mill at 300g per ton of argillaceous oxidized zinc ore; the mass percentage content of zinc in the argillaceous oxidized zinc ore is 4.2%;

[0031] (2) The slurry obtained in step (1) is sequentially added with sodium sulfide, the combination inhibitor and the combination collector to carry out a primary roughing operation to obtain a primary roughing concentrate and a primary roughing tailing; sodium sulfide is added to the slurry of the primary roughing operation at 6kg per ton of argillaceous oxidized zinc ore, the combination inhibitor is added at 1600g, and the combination collector is added at 280g;

[0032] (3) The primary roughing tailing obtained in step (2) is sequentially added with sodium sulfide, the combination inhibitor and the combination collector to carry out a secondary roughing operation to obtain a secondary roughing concentrate and a secondary roughing tailing; sodium sulfide is added to the slurry of the secondary roughing operation at 1.5kg per ton of argillaceous oxidized zinc ore, the combination inhibitor is added at 400g, and the combination collector is added at 70g;

[0033] (4) The secondary roughing tailing obtained in step (3) is sequentially added with the combination inhibitor and the combination collector to carry out a scavenging operation to obtain a scavenging concentrate and a flotation zinc tailing; the combination inhibitor is added to the slurry of the scavenging operation at 200g per ton of argillaceous oxidized zinc ore, and the combination collector is added at 35g;

[0034] (5) combining the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) and performing a concentration operation to obtain a flotation zinc concentrate and a concentrated tailing, wherein the concentrated tailing and the scavenging concentrate obtained in step (4) are combined and returned to the slurry mixing and incorporated into the secondary roughing operation;

[0035] The flotation recovery rate of zinc in this embodiment is 82.8%.

[0036] Example 2: In this example, based on the mass fraction of the combined regulator being 100%, triethanolamine accounts for 55%, triisopropanolamine accounts for 30%, and a mixture of dodecylbenzene accounts for 15%; based on the mass fraction of the combined inhibitor being 100%, water glass accounts for 65%, aminotrimethylenephosphonic acid accounts for 20%, and a phosphonocarboxylic acid copolymer accounts for 15%; based on the mass fraction of the combined collector being 100%, dodecylamine acetate accounts for 50%, sodium dioctyl sulfosuccinate accounts for 35%, and peregal O-25 accounts for 15%;

[0037] like Figure 1 As shown in FIG, a full-size flotation method for muddy zinc oxide ore, the specific steps are as follows:

[0038] (1) The argillaceous zinc oxide ore and the combined regulator are mixed, and then added to a ball mill and ground until the zinc oxide mineral monomers are dissociated, and water is added to adjust the slurry to a mass percentage concentration of 31% to obtain a argillaceous zinc oxide slurry; 500g of the combined regulator is added to the ball mill per ton of argillaceous zinc oxide ore; wherein the mass percentage content of zinc in the argillaceous zinc oxide ore is 6.4%;

[0039] (2) Sodium sulfide, a combined inhibitor, and a combined collector are sequentially added to the slurry obtained in step (1), and a roughing operation is performed to obtain a roughing concentrate and a roughing tailing; per ton of argillaceous zinc oxide ore, 8 kg of sodium sulfide, 2000 g of the combined inhibitor, and 360 g of the combined collector are added to the slurry of the roughing operation;

[0040] (3) Sodium sulfide, a combined inhibitor, and a combined collector are sequentially added to the primary roughing tailings obtained in step (2), and a secondary roughing operation is performed to obtain a secondary roughing concentrate and a secondary roughing tailings; per ton of argillaceous zinc oxide ore, 2.0 kg of sodium sulfide, 500 g of the combined inhibitor, and 90 g of the combined collector are added to the slurry of the secondary roughing operation;

[0041] (4) adding a combined inhibitor and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing a scavenging operation to obtain a scavenged concentrate and a flotation zinc tailings; based on each ton of argillaceous zinc oxide ore, 250 g of the combined inhibitor and 45 g of the combined collector are added to the slurry of the scavenging operation;

[0042] (5) combining the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) and performing a concentration operation to obtain a flotation zinc concentrate and a concentrated tailing, wherein the concentrated tailing and the scavenging concentrate obtained in step (4) are combined and returned to the slurry mixing and incorporated into the secondary roughing operation;

[0043] The flotation recovery rate of zinc in this embodiment is 84.5%.

[0044] Example 3: In this example, based on the mass fraction of the combined regulator being 100%, triethanolamine accounts for 65%, triisopropanolamine accounts for 25%, and a mixture of dodecylbenzene accounts for 10%; based on the mass fraction of the combined inhibitor being 100%, water glass accounts for 75%, aminotrimethylenephosphonic acid accounts for 15%, and a phosphonocarboxylic acid copolymer accounts for 10%; based on the mass fraction of the combined collector being 100%, dodecylamine acetate accounts for 60%, sodium dioctyl sulfosuccinate accounts for 30%, and peregal O-25 accounts for 10%;

[0045] like Figure 1 As shown in FIG, a full-size flotation method for muddy zinc oxide ore, the specific steps are as follows:

[0046] (1) The argillaceous zinc oxide ore and the combined regulator are mixed and then added to a ball mill and ground until the zinc oxide mineral monomers are dissociated. Water is added to adjust the slurry to a mass percentage concentration of 38% to obtain argillaceous zinc oxide slurry. 700 g of the combined regulator is added to the ball mill per ton of argillaceous zinc oxide ore. The mass percentage content of zinc in the argillaceous zinc oxide ore is 8.6%.

[0047] (2) Sodium sulfide, a combined inhibitor, and a combined collector are sequentially added to the slurry obtained in step (1), and a roughing operation is performed to obtain a roughing concentrate and a roughing tailing; per ton of argillaceous zinc oxide ore, 10 kg of sodium sulfide, 2400 g of the combined inhibitor, and 440 g of the combined collector are added to the slurry of the roughing operation;

[0048] (3) Sodium sulfide, a combined inhibitor, and a combined collector are sequentially added to the primary roughing tailings obtained in step (2), and a secondary roughing operation is performed to obtain a secondary roughing concentrate and a secondary roughing tailings; per ton of argillaceous zinc oxide ore, 2.5 kg of sodium sulfide, 600 g of the combined inhibitor, and 110 g of the combined collector are added to the slurry of the secondary roughing operation;

[0049] (4) adding a combined inhibitor and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing a scavenging operation to obtain a scavenged concentrate and a flotation zinc tailing; based on each ton of argillaceous zinc oxide ore, 300 g of the combined inhibitor and 55 g of the combined collector are added to the slurry of the scavenging operation;

[0050] (5) combining the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) to perform cleaning operation to obtain a zinc flotation concentrate and a cleaning tailing, wherein the cleaning tailing and the scavenging concentrate obtained in step (4) are combined to return to the slurry preparation and enter the secondary roughing operation;

[0051] The flotation recovery rate of zinc in the embodiment is 86.3%.

[0052] The specific embodiments of the present application are described in detail above, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A full-size flotation method for argillaceous zinc oxide ore, characterized in that: The specific steps are as follows: (1) The argillaceous zinc oxide ore is mixed with the combined regulator, and then ground until the zinc oxide mineral monomers are dissociated, and water is added to adjust the slurry to a slurry mass concentration of 24-38% to obtain the argillaceous zinc oxide slurry; (2) Sodium sulfide, a combined depressant, and a combined collector are sequentially added to the slurry obtained in step (1), and a roughing operation is performed to obtain a primary roughing concentrate and a primary roughing tailings; (3) Sodium sulfide, a combined inhibitor, and a combined collector are sequentially added to the primary roughing tailings obtained in step (2), and a secondary roughing operation is performed to obtain a secondary roughing concentrate and a secondary roughing tailings; (4) adding a combined inhibitor and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing a scavenging operation to obtain a scavenging concentrate and a flotation zinc tailings; (5) combining the primary roughing concentrate obtained in step (2) and the secondary roughing concentrate obtained in step (3) and performing a concentration operation to obtain a flotation zinc concentrate and a concentrated tailing, wherein the concentrated tailing and the scavenging concentrate obtained in step (4) are combined and returned to the slurry mixing and incorporated into the secondary roughing operation; The combined regulator is a mixture of triethanolamine, triisopropanolamine and dodecylbenzene; the combined inhibitor is a mixture of water glass, aminotrimethylenephosphonic acid and phosphonocarboxylic acid copolymer; and the combined collector is a mixture of dodecylamine acetate, sodium dioctyl sulfosuccinate and peregal O-25.

2. The full-size flotation method for muddy zinc oxide ore according to claim 1, characterized in that: The mass percentage content of zinc in the muddy zinc oxide ore in step (1) is 4.2-8.6%.

3. The full-size flotation method for muddy zinc oxide ore according to claim 1, characterized in that: The amount of the combined adjusting agent added in step (1) is 300-700 g per ton of argillaceous zinc oxide ore.

4. The full-size flotation method for muddy zinc oxide ore according to claim 1, characterized in that: Calculated per ton of argillaceous zinc oxide ore, 6-10 kg of sodium sulfide, 1600-2400 g of combined inhibitor and 280-440 g of combined collector are added to the ore pulp of the first roughing operation in step (2).

5. The full-size flotation method for muddy zinc oxide ore according to claim 1, characterized in that: Based on each ton of argillaceous zinc oxide ore, 1.5-2.5 kg of sodium sulfide, 400-600 g of combined depressant and 70-110 g of combined collector are added to the slurry of the secondary roughing operation in step (3).

6. The full-size flotation method for muddy zinc oxide ore according to claim 1, characterized in that: Based on each ton of argillaceous zinc oxide ore, 200-300 g of the combined inhibitor and 35-55 g of the combined collector are added to the slurry of the scavenging operation in step (4).

7. The full-size flotation method for muddy zinc oxide ore according to claim 1, characterized in that: Taking the mass fraction of the combined regulator as 100%, triethanolamine accounts for 45-65%, triisopropanolamine accounts for 25-35%, and the mixture of dodecylbenzene accounts for 10-20%.

8. The full-size flotation method for argillaceous zinc oxide ore according to claim 1, characterized in that: Taking the mass fraction of the combined inhibitor as 100%, water glass accounts for 55-75%, aminotrimethylenephosphonic acid accounts for 15-25%, and phosphonocarboxylic acid copolymer accounts for 10-20%.

9. The full-size flotation method for muddy zinc oxide ore according to claim 1, characterized in that: Taking the mass fraction of the combined collector as 100%, dodecylamine acetate accounts for 40-60%, sodium dioctyl sulfosuccinate accounts for 30-40%, and peregal O-25 accounts for 10-20%.

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