Combined collectors for molybdenum distillation and their application in molybdenum distillation.

Abstract

This invention relates to the field of mineral processing flotation, specifically disclosing a combined collector for molybdenum flotation and its application in molybdenum flotation. It also discloses a method for preparing the combined collector, which involves mixing kerosene and a surfactant with water in a specific ratio and then dispersing the mixture at high speed until a white emulsion is formed. This emulsion can be applied to the flotation process of molybdenum ore. Under conditions of obtaining similar flotation parameters, the dosage of the combined collector in this invention is significantly reduced compared to the dosage of kerosene, effectively reducing reagent consumption, improving production efficiency, and simultaneously reducing environmental pollution caused by excessive reagents.

Description

Technical Field

[0001] This invention belongs to the field of mineral processing and flotation, and particularly relates to the preparation of a combined collector for molybdenite flotation and its application in molybdenite flotation. Background Technology

[0002] Molybdenum and its alloys are widely used in steel, chemical, petroleum, machinery manufacturing, pharmaceutical and agricultural sectors due to their excellent thermal conductivity, electrical conductivity, high strength, high melting point, high temperature resistance, wear resistance and corrosion resistance. In addition, molybdenum also has broad development prospects in emerging fields and high-tech industries such as nuclear energy, photovoltaics, aerospace, sensors, and military materials.

[0003] The main characteristics of my country's molybdenum resources are: (1) mainly sulfide minerals with many associated beneficial components; (2) low ore grade; and (3) diverse deposit types. The ore minerals in the mined molybdenum deposits are mainly molybdenite. The main types of molybdenum deposits are porphyry, skarn, and quartz vein types, among which porphyry molybdenum deposits are the most abundant and have the largest reserves. The average Mo content of the ore is about 0.12%, and some reach 0.3%. As an important resource for the recovery of copper and molybdenum in China, the low-grade copper and molybdenum ore is difficult to be effectively recovered and utilized with the continuous development and utilization of resources. Moreover, the kerosene collector commonly used in molybdenite flotation has disadvantages such as large dosage, poor selectivity, and poor dispersion effect, and can no longer meet the current production needs.

[0004] Therefore, to address the issues of high kerosene consumption, poor selectivity, and ineffective dispersion, and to improve the utilization rate of molybdenum ore resources and reduce production costs, developing a high-performance novel collector is one of the keys to improving the flotation recovery of molybdenite. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a combined collector for the flotation recovery of molybdenite and its application method in the flotation of molybdenite. In addition to achieving efficient collection of molybdenite, the collector can also reduce the amount of kerosene used while ensuring a high molybdenum grade and recovery rate in the concentrate.

[0006] To solve the above technical problems, the specific technical solution of the present invention is as follows:

[0007] A combined collector for molybdenite flotation, characterized in that the combined collector is a white emulsion formed by high-speed stirring and dispersion of water, surfactant and kerosene.

[0008] Furthermore, the surfactant is one or a mixture of both of dodecyl dimethyl betaine and sodium dodecyl sulfate.

[0009] Furthermore, the mass ratio of surfactant to kerosene in the collector is 1:30 to 1:12.

[0010] Furthermore, the collector is prepared by mixing a surfactant with kerosene and then stirring it with water at 2000 r / min until a white emulsion is formed.

[0011] As a general inventive concept, this invention also provides the application of the combined collector in molybdenite flotation, the application process including the following steps:

[0012] (1) Grind the raw ore to obtain a flotation slurry of a certain concentration;

[0013] (2) Add inhibitors to inhibit pyrite and chalcopyrite respectively, then add the combined collector and frother described in this invention to fully adjust the slurry, and then carry out roughing operation to obtain roughing concentrate product and roughing tailings product respectively.

[0014] (3) The roughing concentrate product is finely selected without the addition of reagents to obtain molybdenum concentrate; the combined collector and frother are added to the roughing tailings for scavenging to obtain molybdenum tailings.

[0015] Furthermore, in step (1), the mineral particle size in the slurry is -0.074mm, accounting for 65-85%, and the flotation slurry concentration is 30%, which can achieve the purpose of selective dissociation of the flotation sample.

[0016] Furthermore, the inhibitors mentioned in step (2) are CaO and C2H3NaO2S, the combined collector is a white emulsion obtained by mixing surfactant and kerosene with water in a mass ratio of 1:30-1:12 and stirring at high speed, and the foaming agent is No. 2 oil.

[0017] Furthermore, the dosage of the CaO drug is 500-800 g / t. -1 The dosage of C2H3NaO2S is 80-300 g / t. -1 The dosage of the combined harvester is 100-300 g / t. -1 The dosage of foaming agent No. 2 oil is 50-150g / t. -1 The addition of frothers mainly adjusts the strength of the foam generated during flotation, allowing it to adhere to the mineral surface after the collector has acted upon it, thereby achieving the flotation recovery of the target mineral.

[0018] Furthermore, in step (3), the number of times of reagent-free refining is five, and the concentrate obtained from the last refining is molybdenum concentrate; the number of times of scavenging is two, and the tailings obtained from the last scavenging are molybdenum tailings.

[0019] The tailings from the first cleaning process are combined with the concentrate from the first scavenging process and returned to the roughing process for further cleaning; the tailings from the second cleaning process are returned to the first cleaning process for further cleaning; the concentrate from the second scavenging process is returned to the first scavenging process for further cleaning; the tailings from the third cleaning process are directly returned to the second cleaning process for further cleaning; the tailings from the fourth cleaning process are directly returned to the third cleaning process for further cleaning; and the tailings from the fifth cleaning process are directly returned to the fourth cleaning process for further cleaning.

[0020] In the aforementioned scavenging process, the dosage of the combined collector is 5-50 g / t for each scavenging operation. -1 The dosage of the foaming agent is 5-30 g / t. -1 .

[0021] The beneficial effects of this invention are:

[0022] The combined collector prepared in this invention for molybdenite flotation is stable and can be stored stably for more than two months, significantly improving the dispersibility of kerosene in water. Under similar flotation performance conditions, the combined collector prepared in this invention reduces kerosene usage by more than 50% compared to using a single kerosene collector. Applying the combined collector described in this invention to the molybdenite flotation recovery process can significantly reduce kerosene usage while ensuring flotation performance, thus helping concentrators reduce production costs and minimize environmental pollution from excessive reagents. Attached Figure Description

[0023] Figure 1 This is a flow chart of the molybdenite flotation and recovery process according to an embodiment of the present invention. Detailed Implementation

[0024] To further clarify the technical means and effects of this invention in achieving the intended results, the invention will be described in detail below with reference to the accompanying drawings and embodiments. Obviously, the embodiments described are only some examples of the implementation of this invention. Therefore, it should be noted that the scope of protection of this invention is not limited to the following specific embodiments; all embodiments obtained in the art based on this invention without significant inventive step are within the scope of protection of this invention.

[0025] Ore raw material: A porphyry molybdenum deposit in Shaanxi Province, containing 0.15% molybdenum, 0.04% copper, 3.61% iron, and 2.85% sulfur. The main metallic mineral components in the ore are molybdenite, chalcopyrite, and pyrite, while the non-metallic gangue minerals are mainly quartz.

[0026] Example 1

[0027] A method for applying a combined collector in molybdenite flotation is shown in the attached figure. Figure 1 As shown, the specific operation steps are as follows:

[0028] (1) The raw ore is added to a rod mill for grinding. The particle size of the grinding product is controlled at -0.074mm, accounting for 65%, and the grinding concentration is 60%.

[0029] (2) The sample obtained in step (1) is fed into the flotation cell and the pulp is adjusted to a pulp concentration of 30%. CaO, C2H3NaO2S, combined collector and frother No. 2 oil are added in sequence and the pulp is fully adjusted. Air is then introduced for roughing to obtain rough concentrate and rough tailings. The combined collector used is composed of dodecyl dimethyl betaine and kerosene in a mass ratio of 1:20. At room temperature, the oil and water are mixed at a ratio of 5% oil (referring to kerosene) and stirred until a stable white emulsion is formed.

[0030] (3) The roughing concentrate is subjected to five cleaning processes without the addition of reagents. The concentrate obtained from the last cleaning process is molybdenum concentrate. The roughing tailings are subjected to two scavenging processes with the addition of a combined collector and a frother. The tailings obtained from the last scavenging process are molybdenum tailings. The tailings from the first cleaning process are combined with the concentrate from the first scavenging process and returned to the roughing process for further cleaning; the tailings from the second cleaning process are returned to the first cleaning process for further cleaning; the concentrate from the second scavenging process is returned to the first scavenging process for further cleaning; the tailings from the third cleaning process are directly returned to the second cleaning process for further cleaning; the tailings from the fourth cleaning process are directly returned to the third cleaning process for further cleaning; and the tailings from the fifth cleaning process are directly returned to the fourth cleaning process for further cleaning.

[0031] In steps (2) and (3) above, the amount of CaO used in the rough selection is 500 g·t. -1 The dosage of C2H3NaO2S is 80g·t -1 The dosage of the combined collector is 100 g / t. -1 The dosage of foaming agent No. 2 oil is 50g / t. -1 The dosage of the combined collector used in the first sweep was 30 g / t. -1 Foaming agent No. 2 oil dosage is 10g / t -1 The combined collector dosage for the second sweep was 15 g / t. -1 The dosage of foaming agent No. 2 oil is 5g / t. -1 .

[0032] Example 2

[0033] A method for applying a combined collector in molybdenite flotation is shown in the attached figure. Figure 1 As shown, the specific operation steps are as follows:

[0034] (1) The raw ore is added to a rod mill for grinding. The particle size of the grinding product is controlled at -0.074mm, accounting for 85%, and the grinding concentration is 60%.

[0035] (2) The sample obtained in step (1) is fed into the flotation cell and the pulp is adjusted to a pulp concentration of 30%. CaO, C2H3NaO2S, combined collector and frother No. 2 oil are added in sequence and the pulp is fully adjusted. Air is then introduced for roughing to obtain rough concentrate and rough tailings. The combined collector used is sodium dodecyl sulfate and kerosene in a mass ratio of 1:30. At room temperature, the oil and water are mixed at a ratio of 5% oil content and stirred until a stable white emulsion is formed.

[0036] (3) The roughing concentrate is subjected to five cleaning processes without the addition of reagents. The concentrate obtained from the last cleaning process is molybdenum concentrate. The roughing tailings are subjected to two scavenging processes with the addition of a combined collector and a frother. The tailings obtained from the last scavenging process are molybdenum tailings. The tailings from the first cleaning process are combined with the concentrate from the first scavenging process and returned to the roughing process for further cleaning; the tailings from the second cleaning process are returned to the first cleaning process for further cleaning; the concentrate from the second scavenging process is returned to the first scavenging process for further cleaning; the tailings from the third cleaning process are directly returned to the second cleaning process for further cleaning; the tailings from the fourth cleaning process are directly returned to the third cleaning process for further cleaning; and the tailings from the fifth cleaning process are directly returned to the fourth cleaning process for further cleaning.

[0037] In steps (2) and (3) above, the amount of CaO used in the rough selection is 800 g·t. -1 The dosage of C2H3NaO2S is 200g·t -1 The dosage of the combined collector is 150 g / t. -1 The dosage of foaming agent No. 2 oil is 70g / t. -1 The dosage of the combined collector used in the first sweep was 50 g / t. -1 Foaming agent No. 2 oil dosage is 30g / t -1 The combined collector dosage for the second sweep was 30 g / t. -1 The dosage of foaming agent No. 2 oil is 15g / t. -1 .

[0038] Example 3

[0039] A method for applying a combined collector in molybdenite flotation is shown in the attached figure. Figure 1 As shown, the specific operation steps are as follows:

[0040] (1) The raw ore is added to a ball mill for grinding. The particle size of the grinding product is controlled at -0.074mm, accounting for 75%, and the grinding concentration is 60%.

[0041] (2) The sample obtained in step (1) is fed into the flotation cell and the pulp is adjusted to a pulp concentration of 30%. CaO, C2H3NaO2S, combined collector and frother No. 2 oil are added in sequence and the pulp is fully adjusted. Air is then introduced for roughing to obtain rough concentrate and rough tailings. The combined collector used is composed of dodecyl dimethyl betaine and kerosene in a mass ratio of 1:15. At room temperature, the oil and water are mixed at a ratio of 5% oil content and stirred until a stable white emulsion is formed.

[0042] (3) The roughing concentrate is subjected to five cleaning processes without the addition of reagents. The concentrate obtained from the last cleaning process is molybdenum concentrate. The roughing tailings are subjected to two scavenging processes with the aforementioned combined collector and frother. The tailings obtained from the last scavenging process are molybdenum tailings. The tailings from the first cleaning process are combined with the concentrate from the first scavenging process and returned to the roughing process for further cleaning; the tailings from the second cleaning process are returned to the first cleaning process for further cleaning; the concentrate from the second scavenging process is returned to the first scavenging process for further cleaning; the tailings from the third cleaning process are directly returned to the second cleaning process for further cleaning; the tailings from the fourth cleaning process are directly returned to the third cleaning process for further cleaning; and the tailings from the fifth cleaning process are directly returned to the fourth cleaning process for further cleaning.

[0043] In steps (2) and (3) above, the amount of CaO used in the rough selection is 600 g·t. -1 The dosage of C2H3NaO2S is 150g·t -1 The dosage of the combined collector is 120 g / t. -1 The dosage of foaming agent No. 2 oil is 50g / t. -1 The dosage of the combined collector used in the first sweep was 40 g / t. -1 The dosage of foaming agent No. 2 oil is 20g / t. -1 The combined collector dosage for the second sweep was 20 g / t. -1 Foaming agent No. 2 oil dosage is 10g / t -1 .

[0044] Comparative Example 1

[0045] A method for applying kerosene as a collector in the flotation of molybdenite, the specific operating steps of which are as follows:

[0046] (1) The raw ore is added to a rod mill for grinding. The particle size of the grinding product is controlled at -0.074mm, accounting for 75%, and the grinding concentration is 60%.

[0047] (2) Feed the sample obtained in step (1) into the flotation cell, adjust the slurry concentration to 30%, add CaO, C2H3NaO2S, kerosene and frother No. 2 oil in sequence to fully adjust the slurry, and then fill with air for roughing to obtain rough concentrate and rough tailings.

[0048] (3) The roughing concentrate is subjected to five cleaning processes without the addition of reagents. The concentrate obtained from the last cleaning process is molybdenum concentrate. Kerosene and frother are added to the roughing tailings for two scavenging processes. The tailings from the last scavenging process are molybdenum tailings. The tailings from the first cleaning process are combined with the concentrate from the first scavenging process and returned to the roughing process for further cleaning. The tailings from the second cleaning process are returned to the first cleaning process for further cleaning. The concentrate from the second scavenging process is returned to the first scavenging process for further cleaning. The tailings from the third cleaning process are directly returned to the second cleaning process for further cleaning. The tailings from the fourth cleaning process are directly returned to the third cleaning process for further cleaning. The tailings from the fifth cleaning process are directly returned to the fourth cleaning process for further cleaning.

[0049] In steps (2) and (3) above, the amount of CaO used in the rough selection is 600 g·t. -1 The dosage of C2H3NaO2S is 150g·t -1 The amount of kerosene used is 350g / t. -1 The dosage of foaming agent No. 2 oil is 50g / t. -1 The amount of kerosene used in the first scavenging was 100g / t. -1 The dosage of foaming agent No. 2 oil is 20g / t. -1 The amount of kerosene used in the second scavenging was 50g / t. -1 Foaming agent No. 2 oil dosage is 10g / t -1 .

[0050] Comparative Example 2

[0051] A method for applying kerosene as a collector in the flotation of molybdenite, the specific operating steps of which are as follows:

[0052] (1) The raw ore is added to a ball mill for grinding. The particle size of the grinding product is controlled at -0.074mm, accounting for 85%, and the grinding concentration is 60%.

[0053] (2) Feed the sample obtained in step (1) into the flotation cell, adjust the slurry concentration to 30%, add CaO, C2H3NaO2S, kerosene and frother No. 2 oil in sequence to fully adjust the slurry, and then fill with air for roughing to obtain rough concentrate and rough tailings.

[0054] (3) The roughing concentrate is subjected to five cleaning processes without the addition of reagents. The concentrate obtained from the last cleaning process is molybdenum concentrate. Kerosene and frother are added to the roughing tailings for two scavenging processes. The tailings from the last scavenging process are molybdenum tailings. The tailings from the first cleaning process are combined with the concentrate from the first scavenging process and returned to the roughing process for further cleaning. The tailings from the second cleaning process are returned to the first cleaning process for further cleaning. The concentrate from the second scavenging process is returned to the first scavenging process for further cleaning. The tailings from the third cleaning process are directly returned to the second cleaning process for further cleaning. The tailings from the fourth cleaning process are directly returned to the third cleaning process for further cleaning. The tailings from the fifth cleaning process are directly returned to the fourth cleaning process for further cleaning.

[0055] In steps (2) and (3) above, the amount of CaO used in the rough selection is 800 g·t. -1 The dosage of C2H3NaO2S is 200g·t -1 The amount of kerosene used is 430g / t. -1 The dosage of foaming agent No. 2 oil is 70g / t. -1 The amount of kerosene used in the first scavenging was 200g / t. -1 Foaming agent No. 2 oil dosage is 30g / t -1 The amount of kerosene used in the second scavenging was 50g / t. -1 The dosage of foaming agent No. 2 oil is 15g / t. -1 .

[0056] The experimental results of Examples 1-3 and Comparative Examples 1-2 are shown in Table 1 below:

[0057] Table 1. Experimental results of Examples 1-3 and Comparative Examples 1-2

[0058]

[0059] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. In other words, any embodiments obtained in the art based on the present invention without significant inventive improvements are within the scope of protection of the present invention.

Claims

1. Use of a combination collector for molybdenite flotation in molybdenite flotation, characterized in that, The combined collector is a white emulsion formed by high-speed stirring and dispersing water, a surfactant and kerosene, wherein the surfactant is a mixture of one or both of dodecyl dimethyl betaine and sodium dodecyl sulfate; The mass ratio of the surfactant to kerosene in the combined collector is 1:30-1:12; The white emulsion is formed by stirring the mixture of the surfactant and kerosene with water at 2000 r / min; The application process comprises the following steps: (1) grinding the raw ore to obtain a flotation slurry; (2) adding an inhibitor, then adding the combined collector and a frother to sufficiently mix the slurry, and then performing roughing to obtain a roughing concentrate and a roughing tailing; (3) performing cleaning on the roughing concentrate without adding any reagent to obtain a molybdenum concentrate, and adding the combined collector and the frother to the roughing tailing to perform scavenging to obtain a molybdenum tailing.

2. Use according to claim 1, characterized in that, In step (1), the mineral particle size in the slurry is 65-85% of -0.074 mm, and the concentration of the flotation slurry is 30%.

3. Use according to claim 1, characterized in that, In step (2), the inhibitor is CaO and C2H3NaO2S, and the frother is No. 2 oil.

4. Use according to claim 3, characterized in that, CaO dosage is 500-800 g·t -1 C2H3NaO2S dosage is 80-300 g·t -1 Combined collector dosage is 100-300 g·t -1 Foaming agent No. 2 oil dosage is 50-150 g·t -1 .

5. The use according to claim 1, characterized in that, In step (3), the cleaning is performed five times without adding any reagent, and the concentrate obtained in the last cleaning is the molybdenum concentrate; the scavenging is performed twice, and the tailing obtained in the last scavenging is the molybdenum tailing.

6. Use according to claim 5, characterized in that, The tailing of the first cleaning and the concentrate of the first scavenging are combined and returned to the roughing process for reprocessing; the tailing of the second cleaning is returned to the first cleaning process for reprocessing; the concentrate of the second scavenging is returned to the first scavenging process for reprocessing; the tailing of the third cleaning is directly returned to the second cleaning process for reprocessing; the tailing of the fourth cleaning is directly returned to the third cleaning process for reprocessing; and the tailing of the fifth cleaning is directly returned to the fourth cleaning process for reprocessing.

7. Use according to claim 5, characterized in that, In the scanning process, the dosage of the combined collector is 5-50 g·t -1 , and the dosage of the foaming agent is 5-30 g·t -1 .

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