A compound collector and its application in zinc oxide ore flotation

Abstract

The application relates to a compound collector and application thereof in zinc oxide ore flotation, and belongs to the technical field of mineral processing. The compound collector is composed of mixed amine, mixed alcohol, hydrocarbon oil and emulsifier, the mixed amine includes laurylamine and N-dodecyl ethanolamine, the mixed alcohol includes glycerol and n-octanol, the hydrocarbon oil includes kerosene and diesel, and the emulsifier includes sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and dodecyl phenol polyoxyethylene ether; the zinc oxide ore flotation process includes twice roughing, once scavenging, twice cleaning and once cleaning scavenging, the middlings are not returned to the roughing and cleaning operations, the ore is subjected to crushing, grinding, reagent adding and pulp conditioning, and then is subjected to flotation to obtain zinc concentrate and flotation tailings. The compound collector has high selectivity, high collecting capacity, small flotation foam amount, good fluidity, stable process flow, can avoid the influence of slime on the roughing and cleaning indexes, improves the stability and viscosity of the foam layer, and improves the flotation recovery indexes of the zinc oxide ore.

Description

TECHNICAL FIELD

[0001] The application relates to a compound collector and application thereof in zinc oxide ore flotation, and belongs to the technical field of mineral processing. BACKGROUND

[0002] Flotation is a main method for enriching zinc oxide minerals, including direct flotation of fatty acids, chelation flotation, sulfide amine flotation, sulfide xanthate flotation and the like. The fatty acid collector can be used for flotation recovery of zinc oxide minerals, but is easily affected by inevitable metal ions in the ore slurry solution, and the collector has poor selectivity, and can float calcium minerals and minerals activated by metal ions at the same time. The chelation collector can form a stable metal chelate with zinc ions on the surface of zinc oxide minerals through specific functional groups, so that the zinc oxide minerals are separated from ores, but the chelation collector is high in price and is not mature in industrial production. The sulfide amine flotation method is a common enrichment process for zinc oxide ores, and has the characteristics of relatively good flotation indexes, but is easily affected by inevitable slimes in the ore slurry. When the slime content in the ore is high, the flotation froth is armored by the slimes and amine collectors, and it is difficult to defoam, so that the flotation environment and indexes are deteriorated, and the production cannot be normally carried out. The sulfide xanthate flotation method has good selectivity and stable flotation, but the process has high requirements for sulfidation of the surface of zinc oxide minerals, and the flotation recovery rate is still not ideal when the zinc oxide ore with high slime content is treated.

[0003] Therefore, it is urgent to develop a new type of efficient collector and flotation method, so as to maximize the utilization of zinc oxide ore resources and provide technical support for the economic and efficient recovery of complex and refractory zinc resources. SUMMARY

[0004] In view of the technical problems of poor selectivity, weak collecting capacity, large amount of flotation froth and poor flowability, unstable process flow and the like of the traditional zinc oxide ore collector, the application provides a compound collector and application thereof in zinc oxide ore flotation. The compound collector is configured by mixed amine, mixed alcohol, hydrocarbon oil and emulsifier, and is composed of lauryl amine and N-dodecyl ethanol amine, glycerol and n-octanol, kerosene and diesel oil, and sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and dodecyl phenol polyoxyethylene ether. Under the process flow of twice roughing, once scavenging, twice cleaning and once cleaning scavenging, and no middling returning to roughing and cleaning operations, the influence of slimes on the roughing and cleaning indexes is avoided, the stability and viscosity of the froth layer are improved, the flotation recovery index of zinc oxide minerals is significantly improved, and the clean utilization of complex and refractory zinc resources is economically and efficiently realized.

[0005] A compound collector, which is composed of mixed amine, mixed alcohol, hydrocarbon oil and emulsifier, wherein the mixed amine includes lauryl amine and N-dodecyl ethanol amine, the mixed alcohol includes glycerol and n-octanol, the hydrocarbon oil includes kerosene and diesel oil, and the emulsifier includes sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and dodecyl phenol polyoxyethylene ether.

[0006] The mixed amine is 30-40 parts, the mixed alcohol is 20-30 parts, the hydrocarbon oil is 5-15 parts, and the emulsifier is 25-35 parts, based on 100 parts of the mass of the compounded collector.

[0007] The lauryl amine accounts for 65-75%, and the N-dodecyl ethanol amine accounts for 25-35%, based on 100% of the mass fraction of the mixed amine.

[0008] The glycerol accounts for 75-85%, and the n-octanol accounts for 15-25%, based on 100% of the mass fraction of the mixed alcohol.

[0009] The kerosene accounts for 50-60%, and the diesel accounts for 40-50%, based on 100% of the mass fraction of the hydrocarbon oil.

[0010] The sodium dodecyl sulfonate accounts for 55-65%, the sodium dodecyl benzene sulfonate accounts for 20-30%, and the dodecyl phenol polyoxyethylene ether accounts for 10-20%, based on 100% of the mass fraction of the emulsifier.

[0011] The preparation method of the compounded collector comprises the following specific steps:

[0012] S1. The glycerol and the n-octanol are mixed uniformly according to the mass ratio to obtain a mixed alcohol, the lauryl amine and the N-dodecyl ethanol amine are mixed uniformly according to the mass ratio to obtain a mixed amine, the mixed alcohol is added to the mixed amine under the condition of water bath heating to completely dissolve, and then the mixture is stirred uniformly to obtain a mixture I;

[0013] S2. The kerosene and the diesel are mixed uniformly according to the mass ratio to obtain a hydrocarbon oil, the hydrocarbon oil is added to the mixture I under the condition of water bath heating, and the mixture is fully stirred to obtain a mixture II;

[0014] S3. The sodium dodecyl sulfonate, the sodium dodecyl benzene sulfonate, and the dodecyl phenol polyoxyethylene ether are mixed uniformly according to the mass ratio to obtain an emulsifier, the emulsifier is added to the mixture II under the condition of water bath heating, the mixture is fully stirred, and then ultrasonic treatment is performed, and the mixture is cooled to room temperature to obtain the compounded collector.

[0015] The water bath temperature is 45-65℃.

[0016] The application of the compounded collector in the flotation of zinc oxide ore comprises the following specific steps:

[0017] (1) The zinc oxide ore is crushed and ground, and then water is added to prepare a slurry;

[0018] (2) adding required flotation reagents into the ore pulp respectively, after pulp conditioning, carrying out two roughing, one scavenging, two cleaning and one cleaning scavenging, the middlings are not returned to the roughing and cleaning, the cleaning scavenging tailings are returned and entered the scavenging, obtaining zinc concentrate and flotation tailings; the reagents for the first roughing are sodium sulfide 8~10kg, conditioning agent 1000~1400g and complex collector 350~550g per ton of zinc oxide ore; the reagents for the second roughing are conditioning agent 500~700g and complex collector 150~250g; the reagents for the first cleaning are conditioning agent 200~300g and complex collector 80~120g; the reagents for the cleaning scavenging are conditioning agent 300~400g and complex collector 80~120g.

[0019] The mass percentage content of zinc in the zinc oxide ore in the step (1) is 6.2~9.6%.

[0020] The water content of the ore pulp in the step (1) is 65~75wt.%.

[0021] The conditioning agent in the step (2) is a mixture of sodium carbonate, sodium hexametaphosphate and water glass, wherein, based on 100% of the mass fraction of the conditioning agent, the sodium carbonate accounts for 35~45%, the sodium hexametaphosphate accounts for 30~40% and the water glass accounts for 20~30%.

[0022] The beneficial effects of the present application are:

[0023] (1) the present application complexing the amine cationic reagent and the sulfonate anionic reagent, the two types of reagents can reduce the critical micelle concentration through intermolecular association, enhance the reaction activity of the collector, weaken the mutual repulsion between liquid membranes, be beneficial to the thinning of the liquid membrane, improve the stability and viscosity of the flotation froth layer and improve the flowability of the flotation froth;

[0024] (2) the mixed alcohol in the present application can reduce the surface tension of the complex collector system, increase the solubility of the reagent; the hydrocarbon oil can change the structure of the flotation froth, promote the thinning of the liquid membrane, promote the rapid rupture of the gas bubbles and reduce the amount of froth; the emulsifier can not only promote the effective dispersion of other reagents, but also accelerate the drainage speed and gas diffusion speed of the froth liquid membrane and reduce the service life of the flotation froth;

[0025] (3) the middlings generated in the flotation process of the present application are not returned to the roughing and cleaning operations, avoiding the accumulation and circulation of the slime in the flotation system, eliminating the deterioration of the slime on the roughing and cleaning indexes, reducing the consumption of the flotation reagents, optimizing the flotation froth structure and ore carrying capacity, solving the bubble control and slime suppression problems in the zinc oxide ore flotation process and greatly improving the utilization rate of the zinc oxide ore;

[0026] (4) The medicament preparation process is simple, convenient to use, and strong in controllability, can reduce the beneficiation cost, and obtain satisfactory flotation indexes, economically and efficiently solves the technical problems of poor selectivity, weak collecting ability, large amount of flotation foam and poor fluidity, unstable process flow and the like of the traditional zinc oxide ore collector, and realizes green and efficient recovery of complex and refractory zinc resources. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The flotation process flow chart of the zinc oxide ore of the present application. DETAILED DESCRIPTION

[0028] The present application will be further described in conjunction with specific embodiments, but the protection scope of the present application is not limited to the described content.

[0029] The complex collector of all embodiments of the present application is composed of mixed amine, mixed alcohol, hydrocarbon oil and emulsifier, the mixed amine includes laurylamine and N-dodecyl ethanolamine, the mixed alcohol includes glycerol and n-octanol, the hydrocarbon oil includes kerosene and diesel, and the emulsifier includes sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and dodecyl phenol polyoxyethylene ether;

[0030] The preparation method of the complex collector includes the following specific steps:

[0031] S1. The glycerol and n-octanol are mixed uniformly according to the mass ratio to obtain mixed alcohol, the laurylamine and N-dodecyl ethanolamine are mixed uniformly according to the mass ratio to obtain mixed amine, the mixed amine is heated to complete dissolution under the condition of a water bath (45-65 DEG C), then the mixed alcohol is added to the mixed amine, and the mixture I is obtained after uniform stirring;

[0032] S2. The kerosene and diesel are mixed uniformly according to the mass ratio to obtain hydrocarbon oil, the hydrocarbon oil is added to the mixture I under the condition of a water bath (45-65 DEG C), and the mixture II is obtained after sufficient stirring;

[0033] S3. The sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and dodecyl phenol polyoxyethylene ether are mixed uniformly according to the mass ratio to obtain the emulsifier, the emulsifier is added to the mixture II under the condition of a water bath (45-65 DEG C), and the complex collector is obtained after sufficient stirring and ultrasonic treatment and cooling to room temperature.

[0034] Embodiment 1: In this embodiment, 30 parts of mixed amine, 30 parts of mixed alcohol, 5 parts of hydrocarbon oil and 35 parts of emulsifier are mixed, with the mass of the mixed amine being 100 parts; the mass fraction of the mixed amine being 100%, laurylamine accounts for 65%, and N-dodecyl ethanolamine accounts for 35%; the mass fraction of the mixed alcohol being 100%, glycerol accounts for 75%, and n-octanol accounts for 25%; the mass fraction of the hydrocarbon oil being 100%, kerosene accounts for 50%, and diesel accounts for 50%; the mass fraction of the emulsifier being 100%, sodium dodecyl sulfonate accounts for 55%, sodium dodecyl benzene sulfonate accounts for 25%, and dodecyl phenol polyoxyethylene ether accounts for 20%;

[0035] The flotation method of zinc oxide ore (see Figure 1 ), the specific steps are as follows:

[0036] (1) The zinc oxide ore is crushed and ground, and then water is added to prepare a slurry; the mass percentage of zinc in the zinc oxide ore is 6.2%; the water content of the slurry is 75wt.%;

[0037] (2) Sodium sulfide, regulator and complex collector are added to the slurry to perform first roughing to obtain first roughing concentrate and first roughing tailings; the regulator and the complex collector are added to the first roughing tailings to perform second roughing to obtain second roughing concentrate and second roughing tailings; the second roughing tailings are subjected to scavenging to obtain scavenging concentrate and flotation tailings; the first roughing concentrate and the second roughing concentrate are combined, and the regulator and the complex collector are added to perform first cleaning to obtain first cleaning concentrate and first cleaning tailings; the first cleaning concentrate is directly subjected to second cleaning to obtain zinc concentrate I and second cleaning tailings; the first cleaning tailings, the second cleaning tailings and the scavenging concentrate are combined, and the regulator and the complex collector are added to perform cleaning scavenging to obtain zinc concentrate II and cleaning scavenging tailings; the zinc concentrate I and the zinc concentrate II are combined to obtain zinc concentrate; the reagents for the first roughing are sodium sulfide 8kg, regulator 1000g and complex collector 350g per ton of zinc oxide ore; the reagents for the second roughing are regulator 500g and complex collector 150g; the reagents for the first cleaning are regulator 200g and complex collector 80g; the reagents for the cleaning scavenging are regulator 300g and complex collector 80g; the regulator is a mixture of sodium carbonate, sodium hexametaphosphate and water glass, and the mass fraction of the regulator is 100%, sodium carbonate accounts for 35%, sodium hexametaphosphate accounts for 35%, and water glass accounts for 30%;

[0038] In this embodiment, the middlings are not returned to the roughing and cleaning, and the cleaning scavenging tailings are returned and combined with the scavenging to obtain zinc concentrate and flotation tailings;

[0039] In this embodiment, the flotation recovery rate of zinc is 84.7%.

[0040] In this embodiment, the mass of the compounded collector is 100 parts, the mixed amine is 35 parts, the mixed alcohol is 25 parts, the hydrocarbon oil is 15 parts, and the emulsifier is 25 parts; the mass fraction of the mixed amine is 100%, the lauryl amine accounts for 70%, and the N-dodecyl ethanol amine accounts for 30%; the mass fraction of the mixed alcohol is 100%, the glycerol accounts for 80%, and the n-octanol accounts for 20%; the mass fraction of the hydrocarbon oil is 100%, the kerosene accounts for 55%, and the diesel accounts for 45%; the mass fraction of the emulsifier is 100%, the sodium dodecyl sulfonate accounts for 60%, the sodium dodecyl benzene sulfonate accounts for 30%, and the dodecyl phenol polyoxyethylene ether accounts for 10%;

[0041] The flotation method of zinc oxide ore (see Figure 1 ), and the specific steps are as follows:

[0042] (1) The zinc oxide ore is crushed and ground, and then water is added to prepare a slurry; the mass percentage of zinc in the zinc oxide ore is 7.9%; and the water content of the slurry is 70wt.%;

[0043] (2) The sodium sulfide, the regulator, and the compounded collector are added to the slurry to perform the first roughing to obtain the first roughing concentrate and the first roughing tailings; the regulator and the compounded collector are added to the first roughing tailings to perform the second roughing to obtain the second roughing concentrate and the second roughing tailings; the second roughing tailings are subjected to the scavenging to obtain the scavenging concentrate and the flotation tailings; the first roughing concentrate and the second roughing concentrate are combined, and the regulator and the compounded collector are added to perform the first cleaning to obtain the first cleaning concentrate and the first cleaning tailings; the first cleaning concentrate is directly subjected to the second cleaning to obtain the zinc concentrate I and the second cleaning tailings; the first cleaning tailings, the second cleaning tailings, and the scavenging concentrate are combined, and the regulator and the compounded collector are added to perform the cleaning scavenging to obtain the zinc concentrate II and the cleaning scavenging tailings; the zinc concentrate I and the zinc concentrate II are combined to obtain the zinc concentrate; the reagents for the first roughing are the sodium sulfide 9kg, the regulator 1200g, and the compounded collector 450g per ton of zinc oxide ore; the reagents for the second roughing are the regulator 600g and the compounded collector 200g; the reagents for the first cleaning are the regulator 250g and the compounded collector 100g; the reagents for the cleaning scavenging are the regulator 350g and the compounded collector 100g; the regulator is a mixture of sodium carbonate, sodium hexametaphosphate, and water glass, and the mass fraction of the regulator is 100%, the sodium carbonate accounts for 40%, the sodium hexametaphosphate accounts for 40%, and the water glass accounts for 20%;

[0044] In this embodiment, the middlings are not returned to the roughing and cleaning, the cleaning scavenging tailings are returned and combined with the scavenging to obtain the zinc concentrate and the flotation tailings;

[0045] In this embodiment, the flotation recovery rate of zinc is 86.1%.

[0046] In this embodiment, the mass of the compounded collector is 100 parts, the mixed amine is 40 parts, the mixed alcohol is 20 parts, the hydrocarbon oil is 10 parts, and the emulsifier is 30 parts; the mass fraction of the mixed amine is 100%, the lauryl amine accounts for 75%, and the N-dodecyl ethanolamine accounts for 25%; the mass fraction of the mixed alcohol is 100%, the glycerol accounts for 85%, and the n-octanol accounts for 15%; the mass fraction of the hydrocarbon oil is 100%, the kerosene accounts for 60%, and the diesel accounts for 40%; the mass fraction of the emulsifier is 100%, the sodium dodecyl sulfonate accounts for 65%, the sodium dodecyl benzene sulfonate accounts for 20%, and the dodecyl phenol polyoxyethylene ether accounts for 15%;

[0047] The flotation method of zinc oxide ore (see Figure 1 ), and the specific steps are as follows:

[0048] (1) The zinc oxide ore is crushed and ground, and then water is added to prepare a slurry; the mass percentage of zinc in the zinc oxide ore is 6.2%; the water content of the slurry is 65wt.%;

[0049] (2) Sodium sulfide, an adjusting agent, and a compounded collector are added to the slurry to perform first roughing to obtain a first roughing concentrate and a first roughing tailing; the adjusting agent and the compounded collector are added to the first roughing tailing to perform second roughing to obtain a second roughing concentrate and a second roughing tailing; the second roughing tailing is subjected to scavenging to obtain a scavenging concentrate and a flotation tailing; the first roughing concentrate and the second roughing concentrate are combined, and the adjusting agent and the compounded collector are added to perform first cleaning to obtain a first cleaning concentrate and a first cleaning tailing; the first cleaning concentrate is directly subjected to second cleaning to obtain a zinc concentrate I and a second cleaning tailing; the first cleaning tailing, the second cleaning tailing, and the scavenging concentrate are combined, and the adjusting agent and the compounded collector are added to perform cleaning scavenging to obtain a zinc concentrate II and a cleaning scavenging tailing; the zinc concentrate I and the zinc concentrate II are combined to obtain a zinc concentrate; the reagents for the first roughing are sodium sulfide 10 kg, the adjusting agent 1400 g, and the compounded collector 550 g per ton of zinc oxide ore; the reagents for the second roughing are the adjusting agent 700 g and the compounded collector 250 g; the reagents for the first cleaning are the adjusting agent 300 g and the compounded collector 120 g; the reagents for the cleaning scavenging are the adjusting agent 400 g and the compounded collector 120 g; the adjusting agent is a mixture of sodium carbonate, sodium hexametaphosphate, and water glass; the mass fraction of the adjusting agent is 100%, the sodium carbonate accounts for 45%, the sodium hexametaphosphate accounts for 30%, and the water glass accounts for 25%;

[0050] In this embodiment, the middlings are not returned to the roughing and cleaning, and the cleaning scavenging tailing is returned and combined with the scavenging to obtain the zinc concentrate and the flotation tailing;

[0051] In this embodiment, the flotation recovery rate of zinc is 88.3%.

[0052] The above detailed description of the present application is made with reference to specific embodiments thereof, but the present application is not limited to the above 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. Use of a combination collector in the flotation of zinc oxide ores, characterized in that, The complex collector is composed of mixed amine, mixed alcohol, hydrocarbon oil and emulsifier, the mixed amine includes laurylamine and N-dodecyl ethanolamine, the mixed alcohol includes glycerol and n-octanol, the hydrocarbon oil includes kerosene and diesel, and the emulsifier includes sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and dodecyl phenol polyoxyethylene ether. The mass of the complex collector is 100 parts, the mixed amine is 30-40 parts, the mixed alcohol is 20-30 parts, the hydrocarbon oil is 5-15 parts, and the emulsifier is 25-35 parts; the mass fraction of the mixed amine is 100%, the laurylamine accounts for 65-75%, and the N-dodecyl ethanolamine accounts for 25-35%; the mass fraction of the mixed alcohol is 100%, the glycerol accounts for 75-85%, and the n-octanol accounts for 15-25%; the mass fraction of the hydrocarbon oil is 100%, the kerosene accounts for 50-60%, and the diesel accounts for 40-50%; the mass fraction of the emulsifier is 100%, the sodium dodecyl sulfonate accounts for 55-65%, the sodium dodecyl benzene sulfonate accounts for 20-30%, and the dodecyl phenol polyoxyethylene ether accounts for 10-20%. The specific steps are as follows: (1) crushing and grinding the zinc oxide ore, and then adding water to prepare a slurry; (2) adding the required flotation reagents to the slurry, adjusting the slurry, and then performing two roughing, one scavenging, two cleaning and one cleaning scavenging, the middlings are not returned to the roughing and cleaning, the tailings of the cleaning scavenging are returned and entered the scavenging, to obtain zinc concentrate and flotation tailings; the reagents for the first roughing are sodium sulfide 8-10 kg, adjusting agent 1000-1400 g and complex collector 350-550 g per ton of zinc oxide ore; the reagents for the second roughing are adjusting agent 500-700 g and complex collector 150-250 g; the reagents for the first cleaning are adjusting agent 200-300 g and complex collector 80-120 g; the reagents for the cleaning scavenging are adjusting agent 300-400 g and complex collector 80-120 g.

2. Use according to claim 1, characterized in that: The mass percentage content of zinc in the zinc oxide ore in step (1) is 6.2-9.6%.

3. Use according to claim 1, characterized in that: The adjusting agent in step (2) is a mixture of sodium carbonate, sodium hexametaphosphate and water glass, the mass fraction of the adjusting agent is 100%, the sodium carbonate accounts for 35-45%, the sodium hexametaphosphate accounts for 30-40%, and the water glass accounts for 20-30%.

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