CN113751203A - Beneficiation method for copper-molybdenum ore in alpine region - Google Patents

Abstract

The invention provides a beneficiation method for copper-molybdenum ores in alpine regions, which comprises the following steps: (1) grinding and size mixing copper and molybdenum raw ores, adding a regulator, a collecting agent and a foaming agent, and performing roughing to obtain roughed concentrate and roughed tailings; (2) carrying out fine concentration on the rough concentrate obtained in the step (1) to obtain copper-molybdenum concentrate; carrying out scavenging on the roughed tailings obtained in the step (1) to obtain tailings; the collecting agent in the step (1) comprises the combination of N, N-diethyl dithiocarbamate propionitrile ester, methyl isobutyl carbinol, alkylphenol polyoxyethylene ether and diesel oil. The beneficiation method improves the selectivity of the collecting agent, can recover copper and molybdenum at the same time, is low-temperature resistant, and can efficiently utilize copper-molybdenum ore resources in alpine regions.

Description

Beneficiation method for copper-molybdenum ore in alpine region

Technical Field

The invention belongs to the technical field of mineral processing, and particularly relates to a beneficiation method for copper-molybdenum ores in alpine regions.

Background

Many large-scale rock-like copper-molybdenum ores in China are located in high and cold areas, such as Yunnan common brown copper-molybdenum ores, Tibet Yulong copper-molybdenum ores, Tibet Julong copper-molybdenum ores, Tibet Merman polymetallic ores and the like, and the ores have the characteristics of low grade, fine embedded granularity, complex components and the like, and are located in the high and cold areas and dry in the environment. The two characteristics lead to the fact that the recovery difficulty of copper molybdenum ore is larger in alpine regions, the comprehensive recovery rate of part of low-grade copper molybdenum ore resources is not high, and resource waste is caused.

The flotation method of copper-molybdenum ore generally comprises the process flows of preferential flotation, partial mixed flotation, mixed flotation and the like, and because the associated molybdenum grade is usually very low, most porphyry copper-molybdenum ore generally adopts the mixed flotation process, and various minerals are effectively separated through the use of flotation reagents. CN109806981A discloses a beneficiation method for copper molybdenum ore, which comprises the following steps of firstly carrying out ore grinding treatment on copper molybdenum raw ore; in the process of ore grinding treatment, no regulator is added into the ore pulp, so that the ore pulp keeps a natural pH value, and the mixed flotation operation is carried out at the natural pH value; sequentially adding specific collectors of copper-molybdenum ore, namely thiophosphate, butyl ether alcohol, thiamine ester and the like and foaming agents into the ore pulp in the process of roughing the ore pulp, and carrying out copper-molybdenum mixed flotation roughing and twice scavenging to obtain tailings; and adding a pH regulator and a molybdenum mineral activating agent in the process of mixing and concentrating, and concentrating for three times to obtain the required copper-molybdenum mixed concentrate. The method can obviously improve the quality and the recovery rate of the copper-molybdenum bulk concentrate on the premise of ensuring the copper grade, and particularly greatly improve the recovery rate of molybdenum minerals. However, the preparation method is not suitable for recovering copper-molybdenum ores in alpine regions.

CN112371345A discloses a beneficiation method of low-grade micro-fine particle refractory copper-molybdenum ore, which comprises the steps of preparing ore pulp, adding a medicament, concentrating the ore pulp, and carrying out stepped interactive separation on the ore pulp. By mixing the rough concentrate of different levels with the raw ore and enriching the foam layer in the next ore dressing process, the proportion of useful minerals and gangue minerals in the raw ore is changed, the carrier content in the fine-level target mineral flotation process is increased, and the floating speed and the enrichment degree of the minerals are improved. In addition, the tailings of the fine concentration I are returned to the first layer of raw ore rough concentration I operation, so that the target mineral carrier and metal content in the initial rough concentration process are increased, the whole process is circulated well, the grades and the recovery rates of copper and molybdenum in the bulk concentrate can be obviously increased, and the medicament consumption in the ore dressing process can be saved. However, the method has poor selectivity, is easy to mix with pyrite and other gangue minerals, and cannot well consider the collection of copper and molybdenum.

Therefore, the research and development of a beneficiation method for copper-molybdenum ores in alpine regions and the improvement of the recovery rate of copper and molybdenum are problems to be solved urgently in the field.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a beneficiation method for copper-molybdenum ores in alpine regions. The beneficiation method improves the formula of the collecting agent, enhances the selectivity of minerals, breaks through the limitation of the traditional beneficiation method, can recover copper and molybdenum, is low-temperature resistant, and can efficiently utilize copper-molybdenum ore resources in alpine regions.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a beneficiation method for copper-molybdenum ores in alpine regions, which comprises the following steps:

(1) grinding and size mixing copper and molybdenum raw ores, adding a regulator, a collecting agent and a foaming agent, and performing roughing to obtain roughed concentrate and roughed tailings;

(2) carrying out fine concentration on the rough concentrate obtained in the step (1) to obtain copper-molybdenum concentrate; carrying out scavenging on the roughed tailings obtained in the step (1) to obtain tailings;

the collecting agent in the step (1) comprises the combination of N, N-diethyl dithiocarbamate propionitrile ester, methyl isobutyl carbinol, alkylphenol polyoxyethylene ether and diesel oil.

According to the invention, the collecting agent of the beneficiation method adopts the combination of N, N-diethyl dithiocarbamate propionitrile ester, methyl isobutyl carbinol, alkylphenol polyoxyethylene ether and diesel oil, so that the copper and molybdenum can be collected at the same time, and the collecting agent has good solubility, fluidity and dispersibility in a cold and dry environment due to the existence of the methyl isobutyl carbinol, the alkylphenol polyoxyethylene ether and the diesel oil, so that the beneficiation method is also suitable for high and cold areas, and the recovery rate of copper and molybdenum cannot be reduced.

As a preferred technical scheme of the invention, the conditioning agent in the step (1) comprises the combination of lime and sodium carbonate.

In the invention, the modifier is improved to be the combination of lime and sodium carbonate, so that the selectivity to minerals is further improved; the lime can prevent pyrite from being recycled, and can improve the foam performance in the flotation process and improve the mineralization effect; and the sodium carbonate can avoid the influence of calcium and magnesium ions, disperse ore pulp, promote the full contact of the collecting agent and copper-molybdenum minerals and avoid the floating of the mixed gangue.

Preferably, the conditioning agent in the step (1) comprises 0.5-1.5 parts by weight of lime and 0.5-1.5 parts by weight of sodium carbonate.

Preferably, the conditioning agent comprises 0.5 to 1.5 parts of lime, for example, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, etc.

Preferably, the modifier comprises 0.5 to 1.5 parts of sodium carbonate, which may be, for example, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, etc.

Preferably, the mass of the modifier in the step (1) is 200 to 500g, for example, 200g, 250g, 300g, 350g, 400g, 450g, 500g, etc., based on 1t of the copper-molybdenum raw ore.

Preferably, the collector in the step (1) comprises 65-75 parts by weight of N, N-diethyldithiocarbamate propionitrile ester, 5-10 parts by weight of methyl isobutyl carbinol, 1-3 parts by weight of alkylphenol polyoxyethylene ether and 20-25 parts by weight of diesel oil.

In the invention, the N, N-diethyl dithiocarbamate propionitrile ester in the collecting agent has good flotation selectivity to copper sulfide and the diesel oil has good selectivity to molybdenum, the methyl isobutyl carbinol can promote the dissolution of the N, N-diethyl dithiocarbamate propionitrile ester, and the alkylphenol polyoxyethylene ether can improve the dispersibility of the solution, thereby being beneficial to the selection of copper and molybdenum.

Preferably, the mass of the collecting agent is 60-140 g, for example, 60g, 70g, 80g, 90g, 100g, 110g, 120g, 130g, 140g, etc. based on 1t of the copper-molybdenum raw ore.

In the invention, the mass of the collecting agent is 60-140 g, which represents that the total amount of the collecting agent added in the roughing operation is 60-140 g.

Preferably, the foaming agent of step (1) comprises pine oil.

Preferably, the mass of the foaming agent is 20 to 60g, for example, 20g, 25g, 30g, 35g, 40g, 45g, 50g, 55g, 60g, etc., based on 1t of the copper-molybdenum raw ore.

Preferably, the raw copper-molybdenum ore in the step (1) is ground until the mass percentage of-0.074 mm size fraction materials in the raw copper-molybdenum ore is 55-70%; for example, the concentration may be 55%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, or the like.

Preferably, the step of conditioning comprises: and grinding the copper-molybdenum raw ore, and mixing the ground copper-molybdenum raw ore with a solvent to obtain ore pulp.

Preferably, the solvent is water.

Preferably, the solid content of the ore pulp is 30-40%, for example, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, etc.

Preferably, the roughing in the step (1) comprises at least one roughing operation.

Preferably, the temperature for the roughing in step (1) is 9 to 25 ℃, for example, 9 ℃, 10 ℃, 11 ℃, 12 ℃, 13 ℃, 14 ℃, 15 ℃, 16 ℃, 17 ℃, 18 ℃, 19 ℃, 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃ and the like.

Preferably, the rougher concentrate in the step (2) is ground rougher concentrate.

Preferably, the mass percentage of-0.045 mm fraction materials in the roughed concentrate after grinding is 80-90%, for example, 80%, 82%, 84%, 86%, 88%, 90% and the like.

Preferably, the concentration of step (2) is blank concentration.

Preferably, said concentrating of step (2) comprises at least three concentrating operations.

Preferably, the beneficiation comprises beneficiation I, beneficiation II, and beneficiation III.

Preferably, the middlings obtained by the concentration I are returned to the rough concentration operation for separation.

Preferably, middlings obtained by the concentration II and the concentration III are sequentially returned to the previous concentration operation for separation.

Preferably, the temperature for the selection in step (2) is 9 to 25 ℃, for example, 9 ℃, 10 ℃, 11 ℃, 12 ℃, 13 ℃, 14 ℃, 15 ℃, 16 ℃, 17 ℃, 18 ℃, 19 ℃, 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃ and the like.

Preferably, the scavenging of the step (2) comprises at least two scavenging operations.

Preferably, the scavenging of step (2) comprises scavenging I and scavenging II.

Preferably, a collector is added in the scavenging of the step (2).

In the invention, the collecting agent added in the scavenging process is the same as the collecting agent added in the step (1).

Preferably, the collecting agent in the scavenging process I has a mass of 10-20 g, for example, 10g, 11g, 12g, 13g, 14g, 15g, 16g, 17g, 18g, 19g, 20g and the like, based on 1t of the copper-molybdenum raw ore.

Preferably, the mass of the collecting agent in the scavenging II is 5-10 g, for example, 5g, 6g, 7g, 8g, 9g, 10g, and the like, based on 1t of the mass of the copper-molybdenum raw ore.

Preferably, the middlings obtained by the scavenging I are returned to the roughing operation for sorting.

Preferably, the middlings obtained by the scavenging II are returned to the scavenging I operation for sorting.

Preferably, the temperature of the scavenging in the step (2) is 9 to 25 ℃, for example, 9 ℃, 10 ℃, 11 ℃, 12 ℃, 13 ℃, 14 ℃, 15 ℃, 16 ℃, 17 ℃, 18 ℃, 19 ℃, 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃ and the like.

As a preferable technical scheme of the invention, the beneficiation method comprises the following steps:

(1) grinding copper-molybdenum raw ore, adding water and mixing to obtain ore pulp; adding a regulator, a collecting agent and a foaming agent into the ore pulp, and then performing rough concentration to obtain rough concentrate and rough tailings;

(2) grinding the rough concentration obtained in the step (1), and carrying out blank concentration to obtain copper-molybdenum concentrate; and (2) adding a collecting agent into the roughed tailings obtained in the step (1), and scavenging to obtain tailings.

The recitation of numerical ranges herein includes not only the above-recited values, but also any values between any of the above-recited numerical ranges not recited, and for brevity and clarity, is not intended to be exhaustive of the specific values encompassed within the range.

Compared with the prior art, the invention has the beneficial effects that:

according to the ore dressing method for copper-molybdenum ores in alpine regions, the combination of N, N-diethyl dithiocarbamate propionitrile ester, methyl isobutyl carbinol, alkylphenol polyoxyethylene ether and diesel oil is adopted as the collecting agent, so that the recovery of copper and molybdenum can be considered at the same time, and the selectivity of minerals is improved; meanwhile, the beneficiation method can also efficiently recover copper and molybdenum at the temperature of less than or equal to 25 ℃, wherein the grade of copper in the copper-molybdenum bulk concentrate is more than 24 percent, and the grade of molybdenum is more than or equal to 0.42 percent; the recovery rate of copper is more than 88 percent, and the recovery rate of molybdenum is more than 73 percent.

Drawings

Fig. 1 is a schematic flow chart of a beneficiation method according to embodiment 1 of the present invention.

Detailed Description

For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

The beneficiation method of the embodiment and the comparative example adopts a one-rough-two-sweep-three-fine flow, wherein middlings obtained by concentration I and scavenging I return to rough concentration operation, middlings obtained by concentration II and concentration III sequentially return to the previous concentration operation, and middlings obtained by scavenging II sequentially return to scavenging I operation.

Example 1

The embodiment provides a beneficiation method for copper-molybdenum ores in alpine regions, which comprises the following specific steps:

(1) grinding copper and molybdenum raw ores (0.52 percent of Cu, 0.011 percent of Mo and 0.64 percent of S) to 65 percent of the mass percentage of-0.074 mm size fraction materials, adding water for size mixing to obtain ore pulp with the solid content of 35 percent, adding 300g/t of regulator, 100g/t of collecting agent and 35g/t of foaming agent, and performing primary roughing at 20 ℃ to obtain roughed concentrate and roughed tailings; wherein the regulator comprises 1 part of lime and 1 part of sodium carbonate in parts by weight; the collecting agent comprises 72 parts of N, N-diethyl dithiocarbamate propionitrile ester, 8 parts of methyl isobutyl carbinol, 1 part of alkylphenol polyoxyethylene ether (NP-10) and 23 parts of diesel oil in parts by weight; the foaming agent is terpineol oil;

(2) grinding the roughing concentrates obtained in the step (1) to 90% by mass of materials with-0.045 mm size fraction, and carrying out blank concentration (including concentration I, concentration II and concentration III) for three times at 20 ℃ to obtain copper-molybdenum concentrates; and (2) carrying out scavenging twice on the roughed tailings obtained in the step (1) at 20 ℃, adding 15g/t of collecting agent into the scavenging I, and adding 7g/t of collecting agent into the scavenging II to obtain the tailings.

Example 2

The embodiment provides a beneficiation method for copper-molybdenum ores in alpine regions, which comprises the following specific steps:

(1) grinding copper and molybdenum raw ores (0.66 percent of Cu, 0.015 percent of Mo and 0.84 percent of S) to 55 percent of the mass percentage of-0.074 mm size fraction materials, adding water for size mixing to obtain ore pulp with the solid content of 30 percent, adding 200g/t of regulator, 140g/t of collecting agent and 40g/t of foaming agent, and performing primary roughing at 20 ℃ to obtain roughed concentrate and roughed tailings; wherein the regulator comprises 1.5 parts of lime and 0.5 part of sodium carbonate in parts by weight; the collecting agent comprises 65 parts of N, N-diethyl dithiocarbamate propionitrile ester, 5 parts of methyl isobutyl carbinol, 1 part of alkylphenol polyoxyethylene (NP-10) and 20 parts of diesel oil in parts by weight; the foaming agent is terpineol oil;

(2) grinding the roughing concentrates obtained in the step (1) to 88 mass percent of-0.045 mm size fraction materials, and carrying out blank concentration (including concentration I, concentration II and concentration III) for three times at 20 ℃ to obtain copper-molybdenum concentrates; and (2) carrying out scavenging twice on the roughed tailings obtained in the step (1) at 20 ℃, adding 10g/t of collecting agent into scavenging I, and adding 6g/t of collecting agent into scavenging II to obtain tailings.

Example 3

The embodiment provides a beneficiation method for copper-molybdenum ores in alpine regions, which comprises the following specific steps:

(1) grinding copper and molybdenum raw ores (0.85 percent of Cu, 0.020 percent of Mo and 1.15 percent of S) to the mass percentage content of-0.074 mm grain-size materials of 70 percent, adding water for size mixing to obtain ore pulp with the solid content of 40 percent, adding 500g/t of regulator, 60g/t of collecting agent and 60g/t of foaming agent, and performing primary roughing at 20 ℃ to obtain roughed concentrate and roughed tailings; wherein the regulator comprises 0.5 part of lime and 1.5 parts of sodium carbonate in parts by weight; the collecting agent comprises 74 parts by weight of N, N-diethyl dithiocarbamate propionitrile ester, 10 parts by weight of methyl isobutyl carbinol, 3 parts by weight of alkylphenol polyoxyethylene ether (NP-10) and 24 parts by weight of diesel oil; the foaming agent is terpineol oil;

(2) grinding the roughing concentrates obtained in the step (1) to 90% by mass of materials with-0.045 mm size fraction, and carrying out blank concentration (including concentration I, concentration II and concentration III) for three times at 20 ℃ to obtain copper-molybdenum concentrates; and (2) carrying out scavenging twice on the roughed tailings obtained in the step (1) at 20 ℃, adding 20g/t of collecting agent into scavenging I, and adding 10g/t of collecting agent into scavenging II to obtain tailings.

Example 4

The embodiment provides a beneficiation method for copper-molybdenum ores in alpine regions, which comprises the following specific steps:

(1) grinding copper and molybdenum raw ores (0.52 percent of Cu, 0.011 percent of Mo and 0.64 percent of S) to 65 percent of the mass percentage of-0.074 mm size fraction materials, adding water for size mixing to obtain ore pulp with the solid content of 35 percent, adding 300g/t of regulator, 100g/t of collecting agent and 35g/t of foaming agent, and performing primary roughing at 20 ℃ to obtain roughed concentrate and roughed tailings; wherein the regulator is lime; the collecting agent comprises 72 parts of N, N-diethyl dithiocarbamate propionitrile ester, 8 parts of methyl isobutyl carbinol, 1 part of alkylphenol polyoxyethylene (NP-10) and 23 parts of diesel oil in parts by weight, and the foaming agent is terpineol oil;

(2) grinding the roughing concentrates obtained in the step (1) to 90% by mass of materials with-0.045 mm size fraction, and carrying out blank concentration (including concentration I, concentration II and concentration III) for three times at 20 ℃ to obtain copper-molybdenum concentrates; and (2) carrying out scavenging twice on the roughed tailings obtained in the step (1) at 20 ℃, adding 15g/t of collecting agent into the scavenging I, and adding 7g/t of collecting agent into the scavenging II to obtain the tailings.

Example 5

The embodiment provides a beneficiation method for copper-molybdenum ores in alpine regions, which is different from embodiment 1 only in that the temperature of roughing, concentrating and scavenging is 9 ℃, and other components, process parameters and process flows are the same as those in embodiment 1.

Example 6

This example provides a beneficiation method for copper-molybdenum ore in alpine regions, which is different from example 1 only in that the temperature of roughing, concentrating and scavenging is 13 ℃, and other components, process parameters and process flows are the same as those in example 1.

Example 7

This example provides a beneficiation method for copper-molybdenum ore in alpine regions, which is different from example 1 only in that the temperature of roughing, concentrating and scavenging is 17 ℃, and other components, process parameters and process flows are the same as those in example 1.

Example 8

This example provides a beneficiation method for copper-molybdenum ore in alpine regions, which is different from example 1 only in that the temperature of roughing, concentrating and scavenging is 25 ℃, and other components, process parameters and process flows are the same as those in example 1.

Example 9

This example provides a beneficiation process which differs from example 5 only in that the part by weight of the N, N-diethyldithiocarbamate propionitrile ester in the collector is 80 parts, and the other components, process parameters and process flow are the same as in example 5.

Comparative example 1

The comparative example provides a beneficiation method for copper-molybdenum ores in alpine regions, which is different from the embodiment 1 only in that the collecting agent is conventional butyl xanthate, and other raw materials, process parameters and process flows are the same as those in the embodiment 1.

Comparative example 2

The comparative example provides a beneficiation method for copper-molybdenum ores in alpine regions, which is different from the embodiment 1 only in that the collecting agent is ethionamide, and other raw materials, process parameters and process flows are the same as those in the embodiment 1.

Comparative example 3

The comparative example provides a beneficiation method for copper-molybdenum ores in alpine regions, which is different from the embodiment 1 only in that the collecting agent is ammonia black, and other raw materials, process parameters and process flows are the same as those in the embodiment 1.

Comparative example 4

The comparative example provides a beneficiation method for copper-molybdenum ores in alpine regions, which is different from the embodiment 1 only in that diesel oil is not contained in the collecting agent, and other raw materials, process parameters and process flows are the same as those in the embodiment 1.

Comparative example 5

The comparative example provides a beneficiation method of copper molybdenum ore in alpine regions, which is different from the embodiment 1 only in that methyl isobutyl carbinol is not contained in the collecting agent, and other raw materials, process parameters and process flows are the same as those of the embodiment 1.

Comparative example 6

The comparative example provides a beneficiation method for copper-molybdenum ores in alpine regions, which is different from example 1 only in that the collecting agent is N, N-diethyl dithiocarbamate propionitrile ester, and other raw materials, process parameters and process flows are the same as those in example 1.

Comparative example 7

The comparative example provides a beneficiation method for copper-molybdenum ores in alpine regions, which is different from example 5 only in that N, N-diethyldithiocarbamate propionitrile ester is replaced by ethioamine in the collecting agent, and other raw materials, process parameters and process flows are the same as those in example 5.

The specific test results are shown in table 1:

TABLE 1

As can be seen from the above table, the beneficiation method provided by the invention treats copper-molybdenum ores at different temperatures by improving the formula of the collecting agent, and not only can recover copper and molybdenum; meanwhile, under the condition of low temperature, the recovery rate of copper and molybdenum can be ensured, the resource waste is avoided, and the method is suitable for treating copper and molybdenum ores in alpine regions.

From examples 1 to 9, it can be seen that, at different temperatures, the copper grade in the copper-molybdenum concentrate is more than 24%, the molybdenum grade is not less than 0.42%, the recovery rate of copper is more than 87%, and the recovery rate of molybdenum is more than 72%, so that the molybdenum grade and the recovery rate of molybdenum in a high and cold area can be improved under the condition of ensuring the copper grade and the recovery rate of copper; as can be seen from the comparison between examples 1-3 and example 4, when the modifier is lime, the grade and recovery rate of copper and molybdenum are reduced, which indicates that the combination of lime and sodium carbonate is used as the modifier to facilitate the recovery of copper and molybdenum ore; by comparing example 5 with example 9, it can be seen that at lower temperatures, the copper molybdenum grade and recovery decrease as the weight fraction of N, N-diethyldithiocarbamate propionitrile increases.

Compared with the comparative examples 1-6, the example 1 shows that when other types of collectors are adopted by the collector or the collector of the invention lacks a certain component, the grade and recovery rate of copper and molybdenum are reduced integrally, wherein the recovery rate of molybdenum is lower than 70%. By comparing example 5 with comparative example 7, it can be seen that the copper molybdenum grade and recovery rate are reduced by replacing propionitrile N, N-diethyldithiocarbamate with thioethanamine at lower temperature.

In conclusion, according to the beneficiation method provided by the invention, the collector forms a specific proportion by N, N-diethyldithiocarbamate propionitrile, methyl isobutyl carbinol, alkylphenol ethoxylates and diesel oil, and meanwhile, as a preferable technical scheme, the combination of lime and sodium carbonate is adopted as the regulator, so that the grade and the recovery rate of copper and molybdenum are improved, the defects that in the prior art, copper and molybdenum indexes are difficult to be considered, the indexes are reduced due to the reduction of the activity of the collector and the like in the copper and molybdenum ore in the alpine region are effectively overcome, and the copper and molybdenum ore resources in the alpine region can be efficiently utilized.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (10)

1. The beneficiation method for copper-molybdenum ores in alpine regions is characterized by comprising the following steps:

(1) grinding and size mixing copper and molybdenum raw ores, adding a regulator, a collecting agent and a foaming agent, and performing roughing to obtain roughed concentrate and roughed tailings;

(2) carrying out fine concentration on the rough concentrate obtained in the step (1) to obtain copper-molybdenum concentrate; carrying out scavenging on the roughed tailings obtained in the step (1) to obtain tailings;

the collecting agent in the step (1) comprises the combination of N, N-diethyl dithiocarbamate propionitrile ester, methyl isobutyl carbinol, alkylphenol polyoxyethylene ether and diesel oil.

2. A beneficiation process according to claim 1, wherein the conditioning agent of step (1) comprises a combination of lime and sodium carbonate;

preferably, the regulator in the step (1) comprises 0.5-1.5 parts of lime and 0.5-1.5 parts of sodium carbonate in parts by weight;

preferably, the mass of the regulator in the step (1) is 200-500 g based on 1t of the mass of the copper-molybdenum raw ore.

3. A beneficiation method according to claim 1 or 2, wherein the collector of step (1) comprises 65 to 75 parts by weight of propionitrile N, N-diethyldithiocarbamate, 5 to 10 parts by weight of methyl isobutyl carbinol, 1 to 3 parts by weight of alkylphenol ethoxylate and 20 to 25 parts by weight of diesel oil;

preferably, the mass of the collecting agent is 60-140 g, calculated by 1t of the mass of the copper-molybdenum raw ore.

4. A beneficiation process according to any one of claims 1 to 3, wherein the foaming agent of step (1) comprises a terpineol oil;

preferably, the mass of the foaming agent is 20-60 g based on 1t of the mass of the copper-molybdenum raw ore.

5. A beneficiation method according to any one of claims 1 to 4, wherein the copper molybdenum raw ore in the step (1) is ground until the mass percentage of a material with a-0.074 mm size fraction in the copper molybdenum raw ore is 55 to 70%;

preferably, the step of conditioning comprises: grinding the copper-molybdenum raw ore and mixing the ground copper-molybdenum raw ore with a solvent to obtain ore pulp;

preferably, the solvent is water;

preferably, the solid content of the ore pulp is 30-40%;

preferably, the roughing in the step (1) comprises at least one roughing operation;

preferably, the temperature of the roughing in the step (1) is 9-25 ℃.

6. A beneficiation method according to any one of claims 1 to 5, wherein the rougher concentrate of step (2) is a ground rougher concentrate;

preferably, the mass percentage of-0.045 mm size fraction materials in the ground rough concentration concentrate is 80-90%.

7. A beneficiation method according to any one of claims 1 to 6, wherein the beneficiation of step (2) is blank beneficiation;

preferably, said concentrating of step (2) comprises at least three concentrating operations;

preferably, said beneficiation comprises beneficiation I, beneficiation II, and beneficiation III;

preferably, the middlings obtained by the fine selection I are returned to the rough selection operation for selection;

preferably, middlings obtained by the concentration II and the concentration III sequentially return to the previous concentration operation for separation;

preferably, the temperature of the concentration in the step (2) is 9-25 ℃.

8. A beneficiation method according to any one of claims 1 to 7, wherein the scavenging of step (2) comprises at least two scavenging operations;

preferably, the scavenging of step (2) comprises scavenging I and scavenging II;

preferably, adding a collector in the scavenging of the step (2);

preferably, the mass of the collecting agent in the scavenging I is 10-20 g, calculated by 1t of the mass of the copper-molybdenum raw ore;

preferably, the mass of the collecting agent in the scavenging II is 5-10 g, wherein the mass of the copper-molybdenum raw ore is 1 t.

9. A beneficiation method according to any one of claims 1 to 8, wherein middlings obtained by the scavenging I are returned to a roughing operation for sorting;

preferably, the middlings obtained by the scavenging II are returned to the scavenging I operation for sorting;

preferably, the temperature of the scavenging in the step (2) is 9-25 ℃.

10. Beneficiation process according to any of claims 1 to 9, characterized in that it comprises the following steps:

(1) grinding copper-molybdenum raw ore, adding water and mixing to obtain ore pulp; adding a regulator, a collecting agent and a foaming agent into the ore pulp, and then performing rough concentration to obtain rough concentrate and rough tailings;

(2) grinding the rough concentration obtained in the step (1), and carrying out blank concentration to obtain copper-molybdenum concentrate; and (2) adding a collecting agent into the roughed tailings obtained in the step (1), and scavenging to obtain tailings.

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