Whole-fraction flotation method for argillaceous zinc oxide ore

Abstract

The invention relates to a full-fraction flotation method for argillaceous zinc oxide ore, and belongs to the technical field of mineral processing. In order to solve the problems that when a desliming flotation technology is adopted for the argillaceous zinc oxide ore, the zinc mineral loss is serious, the middling circulation amount is large and the separation index is poor during non-desliming flotation, starting from the thought that the whole process of ore grinding, pulp mixing and collecting is integrally regulated and controlled, a flotation reagent is developed to selectively regulate and control the mineral surface characteristics and the ore pulp solution environment; and high-efficiency flotation of zinc oxide minerals with different size fractions can be realized under the condition that the argillaceous zinc oxide ore is not deslimed. The ore grinding performance, the dispersion behavior and the size fraction composition of the ore are improved through the combined regulator, and a pre-set condition is created for full-size-fraction flotation of the argillaceous zinc oxide ore; the combined use of the combined inhibitor and the combined collector selectively strengthens the surface hydrophobicity of the zinc oxide minerals, increases the floatability difference between the zinc oxide minerals and gangue minerals, effectively improves the flotation froth performance and the ore loading effect, and realizes the whole-size-fraction recovery of the argillaceous zinc oxide ores.

Description

Technical Field

[0001] The invention relates to a full-grain-grade flotation method for muddy zinc oxide ore, belonging to the technical field of mineral processing. Background Art

[0002] Zinc is widely used in corrosion protection, battery manufacturing, electrical equipment, precision casting, defense industry and other fields. Zinc oxide minerals are an important source of zinc metal refining, but due to the strong hydrophilicity of the surface of zinc oxide minerals, the high content of soluble salts in the ore, and the complex mosaic relationship with the gangue minerals, zinc oxide ore often contains a large amount of primary ore mud, and secondary ore mud is also produced during mining, transportation, crushing, grinding and other processes. Therefore, it is difficult to efficiently recover it using conventional mineral processing methods.

[0003] Amine sulfide flotation is an effective method for separating and enriching zinc oxide minerals, but amine collectors are extremely sensitive to ore slimes. This is because ore slimes consume a large amount of positively charged amine collectors and also adhere to the surfaces of various minerals, causing the collectors to be unable to selectively react with zinc oxide minerals; at the same time, these amine-adhered ore slimes will also adhere to the mineralized foam, making the flotation foam "armored" by the ore slimes and amine collectors, resulting in a long life and high stability of the flotation foam, which will not only increase the circulation of the medium ore, but also make the fluidity of the ore-carrying foam extremely poor and difficult to eliminate, resulting in a serious "running slot" phenomenon, which ultimately makes the flotation process difficult to control and production difficult to carry out. Although better flotation indicators can be obtained after desludging, there are a large number of fine-grained zinc oxide minerals in the removed ore slimes, which cannot be effectively recovered by existing processes and technologies, resulting in serious zinc metal losses, which greatly affects the large-scale application of amine sulfide flotation in zinc oxide concentrators.

[0004] Therefore, it is urgent to develop a full-size flotation method for muddy zinc oxide ore, so as to economically and efficiently flotate and recover zinc oxide ore resources without desludging. Summary of the invention

[0005] Aiming at the problems that zinc mineral loss is serious when desludging flotation process is adopted for muddy zinc oxide ore, and the circulation amount of middlings is large and the sorting index is poor when flotation is performed without desludging, the present invention proposes a full-size flotation method for muddy zinc oxide ore. Starting from the idea of ​​integrated control of the whole process of grinding, slurry adjustment and collection, a new flotation agent is developed to selectively control the surface characteristics of the mineral and the pulp solution environment, so that the muddy zinc oxide ore can achieve efficient flotation of zinc oxide minerals of different size without desludging.

[0006] A full-size flotation method for muddy zinc oxide ore, the specific steps are as follows: (1) Mixing the clay zinc oxide ore and the combined adjusting agent, and then grinding until the zinc oxide mineral monomers are dissociated, adding water to adjust the slurry to a slurry mass percentage concentration of 24-38%, thereby obtaining clay zinc oxide slurry; (2) sodium sulfide, a combined depressant and a combined collector are sequentially added to the ore pulp obtained in step (1), and a roughing operation is performed to obtain a roughing concentrate and a roughing tailing; (3) sodium sulfide, a combined depressant 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 depressant and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing scavenging operations to obtain scavenging concentrate and 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 tailings, wherein the concentrated tailings and the scavenging concentrate obtained in step (4) are combined and returned to the slurry for 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.

[0007] Preferably, the mass percentage content of zinc in the muddy zinc oxide ore in step (1) is 4.2-8.6%.

[0008] Preferably, the amount of the combined adjusting agent added in step (1) is 300-700 g per ton of argillaceous zinc oxide ore.

[0009] Preferably, based on each 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 primary roughing operation in step (2).

[0010] Preferably, per 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).

[0011] Preferably, per ton of argillaceous zinc oxide ore, 200-300 g of the combined depressant and 35-55 g of the combined collector are added to the slurry of the scavenging operation in step (4).

[0012] Preferably, based on 100% by mass of the combined adjusting agent, triethanolamine accounts for 45-65%, triisopropanolamine accounts for 25-35%, and the mixture of dodecylbenzene accounts for 10-20%.

[0013] Preferably, based on 100% by mass fraction of the combined inhibitor, water glass accounts for 55-75%, aminotrimethylenephosphonic acid accounts for 15-25%, and phosphonocarboxylic acid copolymer accounts for 10-20%.

[0014] Preferably, based on 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%.

[0015] The beneficial effects of the present invention are: (1) The present invention starts from the idea of ​​integrated control of the whole process of grinding, slurry adjustment and collection, and selectively controls the surface characteristics of the mineral and the slurry solution environment by developing a new flotation agent, thereby economically and efficiently solving the problems of serious zinc mineral loss when the desludging flotation process is used for muddy zinc oxide ore, large circulation volume of middlings and poor separation index when flotation is performed without desludging, and realizes the flotation recovery of all particle sizes of muddy zinc oxide ore; (2) The present invention regulates the surface energy based on the interaction between the polar groups of the combined regulator and the surface of the ore particles, which can not only reduce the surface hardness and compressive strength of the zinc oxide ore particles, but also weaken the agglomeration between the ore particles and their adhesion to the mill liner and the grinding medium, effectively improving the grinding performance, dispersion behavior and particle size composition of the ore, and creating the prerequisite for the full-size flotation of muddy zinc oxide ore; (3) The combined use of the combined inhibitor and the combined collector of the present invention can not only selectively enhance the surface hydrophobicity of zinc oxide minerals and increase the floatability difference between zinc oxide minerals and gangue minerals, but also optimize the flotation foam structure and ore-carrying capacity, solve the problems of foam control and mud suppression in the flotation process of muddy zinc oxide ores, and open up a new way for the efficient separation and enrichment of complex and difficult-to-separate zinc oxide ores. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with specific implementation modes, but the protection scope of the present invention is not limited to the described contents.

[0018] In the following embodiments of the present invention, 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.

[0019] Example 1: In this example, based on the mass fraction of the combined regulator as 100%, triethanolamine accounts for 45%, triisopropanolamine accounts for 35%, and a mixture of dodecylbenzene accounts for 20%; based on the mass fraction of the combined inhibitor as 100%, water glass accounts for 55%, aminotrimethylenephosphonic acid accounts for 25%, and phosphonocarboxylic acid copolymer accounts for 20%; based on the mass fraction of the combined collector as 100%, dodecylamine acetate accounts for 40%, sodium dioctyl sulfosuccinate accounts for 40%, and peregal O-25 accounts for 20%; like Figure 1 As shown, a full-size flotation method for muddy zinc oxide ore has the following specific steps: (1) The argillaceous zinc oxide ore and the combined regulator are mixed, and then added into a ball mill and ground until the zinc oxide mineral monomers are dissociated, and water is added to adjust the slurry to a slurry mass percentage concentration of 24% to obtain a argillaceous zinc oxide slurry; per ton of argillaceous zinc oxide ore, 300 g of the combined regulator is added into the ball mill; wherein the mass percentage content of zinc in the argillaceous zinc oxide ore is 4.2%; (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, 6 kg of sodium sulfide, 1600 g of the combined inhibitor and 280 g of the combined collector are added to the slurry of the roughing operation; (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, 1.5 kg of sodium sulfide, 400 g of the combined inhibitor and 70 g of the combined collector are added to the slurry of the secondary roughing operation; (4) adding a combined inhibitor and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing scavenging operations to obtain scavenging concentrates and flotation zinc tailings; per ton of argillaceous zinc oxide ore, 200 g of the combined inhibitor and 35 g of the combined collector are added to the slurry of the scavenging operation; (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 tailings, wherein the concentrated tailings and the scavenging concentrate obtained in step (4) are combined and returned to the slurry for mixing and incorporated into the secondary roughing operation; The flotation recovery rate of zinc in this embodiment is 82.8%.

[0020] Example 2: In this example, based on the mass fraction of the combined regulator as 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 as 100%, water glass accounts for 65%, aminotrimethylenephosphonic acid accounts for 20%, and phosphonocarboxylic acid copolymer accounts for 15%; based on the mass fraction of the combined collector as 100%, dodecylamine acetate accounts for 50%, sodium dioctyl sulfosuccinate accounts for 35%, and peregal O-25 accounts for 15%; like Figure 1 As shown, a full-size flotation method for muddy zinc oxide ore has the following specific steps: (1) The argillaceous zinc oxide ore and the combined regulator are mixed, and then added into a ball mill and ground until the zinc oxide mineral monomers are dissociated, and water is added to adjust the slurry to a slurry mass percentage concentration of 31% to obtain a argillaceous zinc oxide slurry; per ton of argillaceous zinc oxide ore, 500 g of the combined regulator is added into the ball mill; wherein the mass percentage content of zinc in the argillaceous zinc oxide ore is 6.4%; (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; (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; (4) adding a combined inhibitor and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing scavenging operations to obtain scavenging concentrates and flotation zinc tailings; per 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; (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 tailings, wherein the concentrated tailings and the scavenging concentrate obtained in step (4) are combined and returned to the slurry for mixing and incorporated into the secondary roughing operation; The flotation recovery rate of zinc in this example is 84.5%.

[0021] Example 3: In this example, based on the mass fraction of the combined regulator as 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 as 100%, water glass accounts for 75%, aminotrimethylenephosphonic acid accounts for 15%, and phosphonocarboxylic acid copolymer accounts for 10%; based on the mass fraction of the combined collector as 100%, dodecylamine acetate accounts for 60%, sodium dioctyl sulfosuccinate accounts for 30%, and peregal O-25 accounts for 10%; like Figure 1 As shown, a full-size flotation method for muddy zinc oxide ore has the following specific steps: (1) The argillaceous zinc oxide ore and the combined regulator are mixed, and then added into 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 38% to obtain a argillaceous zinc oxide slurry; per ton of argillaceous zinc oxide ore, 700 g of the combined regulator is added into the ball mill; wherein the mass percentage content of zinc in the argillaceous zinc oxide ore is 8.6%; (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; (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; (4) adding a combined inhibitor and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing scavenging operations to obtain scavenging concentrates and flotation zinc tailings; per 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; (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 tailings, wherein the concentrated tailings and the scavenging concentrate obtained in step (4) are combined and returned to the slurry for mixing and incorporated into the secondary roughing operation; The flotation recovery rate of zinc in this example is 86.3%.

[0022] The specific implementation modes of the present invention are described in detail above, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A full-size flotation method for argillaceous zinc oxide ore, characterized in that: The specific steps are as follows: (1) Mixing the clay zinc oxide ore and the combined adjusting agent, and then grinding until the zinc oxide mineral monomers are dissociated, adding water to adjust the slurry to a slurry mass percentage concentration of 24-38%, thereby obtaining clay zinc oxide slurry; (2) sodium sulfide, a combined depressant and a combined collector are sequentially added to the ore pulp obtained in step (1), and a roughing operation is performed to obtain a roughing concentrate and a roughing tailing; (3) sodium sulfide, a combined depressant 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 depressant and a combined collector to the secondary roughing tailings obtained in step (3) in sequence, and performing scavenging operations to obtain scavenging concentrate and 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 tailings, wherein the concentrated tailings and the scavenging concentrate obtained in step (4) are combined and returned to the slurry for 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 of muddy zinc oxide ore according to claim 1, characterized in that: The mass percentage content of zinc in the clayey zinc oxide ore in step (1) is 4.2-8.6%.

3. The full-size flotation method of 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 of muddy zinc oxide ore according to claim 1, characterized in that: Based on each 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 primary roughing operation in step (2).

5. The full-size flotation method of 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 of 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 depressant 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 of muddy zinc oxide ore according to claim 1, characterized in that: Taking the mass fraction of the combined adjusting agent 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 of muddy 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 of 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%, dioctyl sodium sulfosuccinate accounts for 30-40%, and peregal O-25 accounts for 10-20%.

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