Combined collecting agent for copper-molybdenum bulk flotation and application of combined collecting agent

Abstract

The invention discloses a combined collector for copper-molybdenum bulk flotation and application thereof.The combined collector is prepared by mixing 3418A, ammonium dibutyl dithiophosphate, hydrocarbons and alcohols according to the mass ratio of 20%, 40%, 15% and 25%, and then conducting ultrasonic dispersion through an ultrasonic crusher under the conditions that the ultrasonic power is 500-1000 W and the ultrasonic time is 5-10 min to prepare a milk white solution, namely the combined collector. The combined collecting agent is applied to the copper-molybdenum bulk flotation process, the dosage of the combined collecting agent is remarkably reduced compared with that of a conventional single collecting agent, a higher flotation index can be obtained, agent consumption is effectively reduced, and production benefits are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mineral flotation separation, in particular to a combined collector for copper-molybdenum mixed flotation and application thereof. Background Art

[0002] At present, the main source of copper and molybdenum metals in industry is porphyry copper-molybdenum ore (chalcopyrite), but they all have the characteristics of (1) few large-scale deposits; (2) more poor ores and fewer rich ores; (3) less single copper minerals and more associated copper minerals, which also leads to the fact that the production capacity of copper-molybdenum ore is far from meeting the actual demand. In porphyry copper-molybdenum deposits, most of them are coexistent copper and molybdenum minerals, and the main minerals are chalcopyrite and molybdenite. The commonly used process is coarse grinding, copper-molybdenum mixed flotation - mixed concentrate regrinding - copper-molybdenum separation, and finally obtain copper concentrate and molybdenum concentrate. Low-grade porphyry copper-molybdenum ore is a typical molybdenum-containing copper mine, and may also be associated with precious metals such as gold and silver. This type of ore often contains pyrite, which is not only affected by oxidation, but also difficult to separate copper, molybdenum and sulfur. Therefore, it is difficult to obtain the ideal quality and recovery rate of copper-molybdenum mixed concentrate with a single collector. The effective combination of different types of collectors can achieve functional complementarity, produce synergistic effects, and obtain ideal separation and recovery effects.

[0003] Therefore, in order to solve the problem of poor flotation ability of a single collector, improve the utilization rate of copper and molybdenum resources and reduce production costs, developing a high-performance combined collector is one of the keys to improving copper and molybdenum mixed flotation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a combined collector for copper-molybdenum mixed flotation and its application, which can not only realize the efficient collection of chalcopyrite, but also enhance the recovery of molybdenite, ensure the grade of copper-molybdenum concentrate, and reduce the dosage of reagents.

[0005] In order to solve the above technical problems, the technical scheme of the present invention is as follows: a combined collector for copper-molybdenum mixed flotation, wherein the combined collector is mixed with 3418A, butyl ammonium black medicine, hydrocarbons and alcohols in a mass ratio of 20%, 40%, 15% and 25%, and then ultrasonically dispersed with an ultrasonic crusher under the conditions of an ultrasonic power of 500-1000W and an ultrasonic time of 5-10min to obtain a milky white solution, namely the combined collector;

[0006] The hydrocarbons are n-pentane and cyclopentane, and the alcohol is n-pentanol.

[0007] The application of the combined collector for copper-molybdenum mixed flotation comprises the following steps:

[0008] (1) Grinding the raw ore to obtain a slurry having a grinding product particle size of -0.074 mm accounting for 60%, a grinding concentration of 75%, and a flotation slurry concentration of 30%;

[0009] (2) adding inhibitor CaO in an amount of 200 g / t, the combined collector in an amount of 10-80 g / t, and No. 2 oil as a frother in an amount of 10-30 g / t, and fully slurrying to perform roughing to obtain roughing concentrate and roughing tailings;

[0010] (3) Grinding the rougher concentrate again to obtain a pulp with a grinding fineness of -0.074 mm accounting for 80%, and then concentrating twice. The dosage of the combined collector in the first concentrating is 10g / t, and the dosage of the frother is 5g / t. No reagent is added in the second concentrating to obtain a concentrated concentrate. The combined collector and the frother are added to the rougher tailings to perform scavenging twice. The dosage of the combined collector in each scavenging is 20-40g / t, and the dosage of the frother is 5-30g / t to obtain scavenging tailings.

[0011] The beneficial effects of the present invention are:

[0012] 1. The combined collector for copper-molybdenum mixed flotation prepared by the present invention has stable physical and chemical properties and can be stably stored.

[0013] 2. Ultrasonic waves can break hydrocarbons into micron-level particles, which can be better adsorbed on the surface of molybdenum ore. 3418A and butyl ammonium black powder can also be fully integrated to act on the surface of chalcopyrite in a synergistic co-adsorption manner, increasing the hydrophobic area of ​​the chalcopyrite surface, thereby achieving efficient recovery of copper-molybdenum mixed ore.

[0014] 3. Under the condition of obtaining similar flotation indexes, the combined collector prepared by the present invention can significantly reduce the dosage compared with a single collector.

[0015] 4. This combined collector is used in copper-molybdenum mixed flotation. It can efficiently capture chalcopyrite and molybdenite, improve the grade and recovery rate of copper-molybdenum concentrate, and reduce the dosage of reagents and production costs by optimizing the reagent ratio and preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flow chart of a copper-molybdenum mixed flotation recovery process using the combined collector for copper-molybdenum mixed flotation. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] Example 1

[0019] This embodiment is an example of the application of the combined collector for copper-molybdenum mixed flotation described herein in copper-molybdenum mixed flotation.

[0020] Ore raw materials: A molybdenum-containing porphyry copper mine in Yunnan, which contains 0.42% copper and 0.007% molybdenum. The target metals are mainly copper and molybdenum. Copper is mainly found in chalcopyrite and chalcocite, and molybdenum is mainly found in molybdenite. The main gangue minerals are serpentine and chlorite.

[0021] As attached Figure 1 The specific steps are as follows:

[0022] (1) The combined collector is composed of 3418A, butyl ammonium black medicine, n-pentane and n-pentanol in a mass ratio of 20%, 40%, 15% and 25%, and then dispersed in an ultrasonic crusher at a power of 700 W for 10 minutes to form a milky white solution.

[0023] (2) Weigh 300g of ore and put it into a ball mill. Add 100g of tap water to make the grinding concentration reach 75%, and the particle size of the grinding product is controlled at -0.074mm, accounting for 60%. The ball-milled sample is placed in a flotation tank and slurried to a pulp concentration of 30%.

[0024] (3) Add inhibitor CaO, combined collector and foaming agent No. 2 oil to the flotation tank in sequence, and after sufficient slurry mixing, fill with air for roughing to obtain roughing concentrate and roughing tailings.

[0025] (4) The roughing concentrate is placed in a ball mill to increase the grinding fineness to 85%, and the combined collector and foaming agent No. 2 oil are added in sequence. After sufficient slurry mixing, air is added to perform concentration 1, and then a second concentration is performed without adding reagents. The concentrate obtained by the last concentration is a copper-molybdenum concentrate. The roughing tailings are scavenged twice, and the tailings of the last scavenging are copper tailings. The tailings of the first concentration are combined with the concentrate of the first scavenging and returned to the roughing process for re-selection; the tailings of the second concentration are returned to the first concentration process for re-selection; the concentrate of the second scavenging is returned to the first scavenging process for re-selection.

[0026] In the above steps (3) and (4), the amount of CaO used in the roughing is 200 g / t, the amount of the combined collector is 80 g / t, and the amount of No. 2 oil is 30 g / t; the amount of the combined collector used in the first scavenging is 40 g / t, and the amount of No. 2 oil is 15 g / t; the amount of the combined collector used in the second scavenging is 20 g / t, and the amount of No. 2 oil is 10 g / t; the amount of the combined collector used in the first fine cleaning is 10 g / t, and the amount of No. 2 oil is 5 g / t.

[0027] Example 2

[0028] This embodiment is an example of the application of the combined collector for copper-molybdenum mixed flotation described in this invention in copper-molybdenum mixed flotation. The ore raw material is the same as that in Example 1, and the specific operation steps are as follows:

[0029] (1) The combined collector is composed of 3418A, butyl ammonium black medicine, cyclopentane and n-pentanol in a mass ratio of 20%, 40%, 15% and 25%, and then dispersed in an ultrasonic crusher at a power of 700 W for 10 minutes to form a milky white solution.

[0030] (2) Weigh 300g of ore and put it into the ball mill. Add 100g of tap water to make the grinding concentration reach 75%. The particle size of the grinding product is controlled at -0.074mm, accounting for 60%. The ball-milled sample is placed in the flotation tank and the pulp is adjusted to a pulp concentration of 30%.

[0031] (3) Add inhibitor CaO, combined collector and foaming agent No. 2 oil to the flotation tank in sequence, and after sufficient slurry mixing, fill with air for roughing to obtain roughing concentrate and roughing tailings.

[0032] (4) The roughing concentrate is placed in a ball mill to increase the grinding fineness to 85%, and the combined collector and foaming agent No. 2 oil are added in sequence. After sufficient slurry mixing, air is added to perform concentration 1, and then a second concentration is performed without adding reagents. The concentrate obtained from the last concentration is copper-molybdenum concentrate. The roughing tailings are scavenged twice, and the tailings from the last scavenging are copper tailings. The tailings from the first concentration are combined with the concentrate from the first scavenging and returned to the roughing process for re-selection; the tailings from the second concentration are returned to the first concentration process for re-selection; and the concentrate from the second scavenging is returned to the first scavenging process for re-selection.

[0033] In the above steps (3) and (4), the amount of CaO used in the roughing is 200 g / t, the amount of the combined collector is 80 g / t, and the amount of No. 2 oil is 30 g / t; the amount of the combined collector used in the first scavenging is 40 g / t, and the amount of No. 2 oil is 15 g / t; the amount of the combined collector used in the second scavenging is 20 g / t, and the amount of No. 2 oil is 10 g / t; the amount of the combined collector used in the first fine selection is 10 g / t, and the amount of No. 2 oil is 5 g / t.

[0034] Example 3

[0035] This embodiment is an example of the application of the combined collector for copper-molybdenum mixed flotation described in this invention in copper-molybdenum mixed flotation. The ore raw material is the same as that in Example 1, and the specific operation steps are as follows:

[0036] (1) The combined collector is composed of 3418A, butyl ammonium black powder, hydrocarbons (n-pentane and cyclopentane in a ratio of 1:1) and n-pentanol in a mass ratio of 20%, 40%, 15% and 25%, and then dispersed in an ultrasonic crusher at a power of 700 W for 10 minutes to form a milky white solution.

[0037] (2) Weigh 300g of ore and put it into the ball mill. Add 100g of tap water to make the grinding concentration reach 75%. The particle size of the grinding product is controlled at -0.074mm, accounting for 60%. The ball-milled sample is placed in the flotation tank and the pulp is adjusted to a pulp concentration of 30%.

[0038] (3) Add inhibitor CaO, combined collector and foaming agent No. 2 oil to the flotation tank in sequence, and after sufficient slurry mixing, fill with air for roughing to obtain roughing concentrate and roughing tailings.

[0039] (4) The roughing concentrate is placed in a ball mill to increase the grinding fineness to 85%, and the combined collector and foaming agent No. 2 oil are added in sequence. After sufficient slurry mixing, air is added to perform concentration 1, and then a second concentration is performed without adding reagents. The concentrate obtained from the last concentration is copper-molybdenum concentrate. The roughing tailings are scavenged twice, and the tailings from the last scavenging are copper tailings. The tailings from the first concentration are combined with the concentrate from the first scavenging and returned to the roughing process for re-selection; the tailings from the second concentration are returned to the first concentration process for re-selection; and the concentrate from the second scavenging is returned to the first scavenging process for re-selection.

[0040] In the above steps (3) and (4), the amount of CaO used in the roughing is 200 g / t, the amount of the combined collector is 80 g / t, and the amount of No. 2 oil is 30 g / t; the amount of the combined collector used in the first scavenging is 40 g / t, and the amount of No. 2 oil is 15 g / t; the amount of the combined collector used in the second scavenging is 20 g / t, and the amount of No. 2 oil is 10 g / t; the amount of the combined collector used in the first fine selection is 10 g / t, and the amount of No. 2 oil is 5 g / t.

[0041] Comparative Example 1

[0042] A combined collector for copper-molybdenum mixed flotation and its application. This comparative example is significantly different from Example 1 in the type of reagent combination. This comparative example does not add a hydrocarbon collector, and the ore raw material is the same as that of Example 1. The specific operation steps are as follows:

[0043] (1) Weigh 300g of ore and put it into a ball mill. Add 100g of tap water to make the grinding concentration reach 75%. The particle size of the grinding product is controlled at -0.074mm, accounting for 60%. The ball-milled sample is placed in a flotation tank and slurried to a slurry concentration of 30%.

[0044] (2) Add inhibitor CaO, 3418A and foaming agent No. 2 oil to the flotation tank in sequence, and after sufficient slurry mixing, fill with air for roughing to obtain roughing concentrate and roughing tailings.

[0045] (3) The roughing concentrate is placed in a ball mill to increase the grinding fineness to 85%, and the combined collector and foaming agent No. 2 oil are added in sequence. After sufficient slurry mixing, air is added to perform concentration 1, and then a second concentration is performed without adding reagents. The concentrate obtained from the last concentration is copper-molybdenum concentrate. The roughing tailings are scavenged twice, and the tailings from the last scavenging are copper tailings. The tailings from the first concentration are combined with the concentrate from the first scavenging and returned to the roughing process for re-selection; the tailings from the second concentration are returned to the first concentration process for re-selection; and the concentrate from the second scavenging is returned to the first scavenging process for re-selection.

[0046] In the above steps (2) and (3), the amount of CaO used in the roughing is 200 g / t, the amount of 3418A used is 120 g / t, and the amount of No. 2 oil used is 30 g / t; the amount of the combined collector used in the first scavenging is 40 g / t, and the amount of No. 2 oil used is 15 g / t; the amount of the combined collector used in the second scavenging is 20 g / t, and the amount of No. 2 oil used is 10 g / t; the amount of the combined collector used in the first fine cleaning is 10 g / t, and the amount of No. 2 oil used is 5 g / t.

[0047] Comparative Example 2

[0048] A combined collector for copper-molybdenum mixed flotation and its application. This comparative example is significantly different from Example 2 in the type of reagent combination. This comparative example does not add n-pentanol, and the ore raw material is the same as that of Example 1. The specific operation steps are as follows:

[0049] (1) Weigh 300g of ore and put it into a ball mill. Add 100g of tap water to make the grinding concentration reach 75%. The particle size of the grinding product is controlled at -0.074mm, accounting for 60%. The ball-milled sample is placed in a flotation tank and slurried to a slurry concentration of 30%.

[0050] (2) Add inhibitor CaO, 3418A and foaming agent No. 2 oil to the flotation tank in sequence, and after sufficient slurry mixing, fill with air for roughing to obtain roughing concentrate and roughing tailings.

[0051] (3) The roughing concentrate is placed in a ball mill to increase the grinding fineness to 85%, and the combined collector and foaming agent No. 2 oil are added in sequence. After sufficient slurry mixing, air is added to perform concentration 1, and then a second concentration is performed without adding reagents. The concentrate obtained from the last concentration is copper-molybdenum concentrate. The roughing tailings are scavenged twice, and the tailings from the last scavenging are copper tailings. The tailings from the first concentration are combined with the concentrate from the first scavenging and returned to the roughing process for re-selection; the tailings from the second concentration are returned to the first concentration process for re-selection; and the concentrate from the second scavenging is returned to the first scavenging process for re-selection.

[0052] In the above steps (2) and (3), the amount of CaO used in the roughing is 200 g / t, the amount of butyl ammonium black powder used is 120 g / t, and the amount of No. 2 oil used is 30 g / t; the amount of the combined collector used in the first scavenging is 40 g / t, and the amount of No. 2 oil used is 15 g / t; the amount of the combined collector used in the second scavenging is 20 g / t, and the amount of No. 2 oil used is 10 g / t; the amount of the combined collector used in the first fine selection is 10 g / t, and the amount of No. 2 oil used is 5 g / t.

[0053] The experimental results of the above-mentioned Examples 1-2 and Comparative Examples 1-2 are shown in Table 1 below:

[0054] Table 1 Experimental results of Examples 1-2 and Comparative Examples 1-2.

[0055]

[0056] It can be seen from the above test results that the combined collectors of the embodiment and the comparative example respectively increase the recovery rates of copper and molybdenum by about 10% under the condition of obtaining similar copper and molybdenum grades, and significantly improve the recovery of copper and molybdenum, indicating that the combined collectors of the embodiment significantly enhance the comprehensive utilization rate of copper and molybdenum.

[0057] The above embodiments are only some implementation cases of the present invention. The scope of protection of the present invention is not limited to the following specific embodiments, and all embodiments obtained by non-significant creative improvements on the basis of the present invention in the art belong to the protection scope of the present invention.

Claims

1. A combined collector for copper-molybdenum mixed flotation, characterized in that: The combined collector is prepared by mixing 3418A, butyl ammonium black medicine, hydrocarbons and alcohols in a mass ratio of 20%, 40%, 15% and 25%, and then using an ultrasonic crusher to ultrasonically disperse under the conditions of an ultrasonic power of 500-1000W and an ultrasonic time of 5-10min to obtain a milky white solution, which is the combined collector; The hydrocarbons are n-pentane and cyclopentane, and the alcohol is n-pentanol.

2. The use of the combined collector for copper-molybdenum mixed flotation according to claim 1, characterized in that: The following steps are involved: (1) Grinding the raw ore to obtain a slurry having a grinding product particle size of -0.074 mm accounting for 60%, a grinding concentration of 75%, and a flotation slurry concentration of 30%; (2) adding an inhibitor CaO in an amount of 200 g / t, a combined collector in an amount of 10-80 g / t, and a foaming agent of No. 2 oil in an amount of 10-30 g / t, and fully slurrying to perform roughing to obtain a roughing concentrate and a roughing tailing; (3) Grinding the rougher concentrate again to obtain a pulp with a grinding fineness of -0.074 mm accounting for 80%, and then concentrating twice. The dosage of the combined collector in the first concentrating is 10g / t, and the dosage of the frother is 5g / t. No reagent is added in the second concentrating to obtain a concentrated concentrate. The combined collector and the frother are added to the rougher tailings to perform scavenging twice. The dosage of the combined collector in each scavenging is 20-40g / t, and the dosage of the frother is 5-30g / t to obtain scavenging tailings.

3. The use of the combined collector for copper-molybdenum mixed flotation according to claim 1, characterized in that: The following steps are involved: (1) The combined collector is prepared by mixing 3418A, butyl ammonium black medicine, cyclopentane and n-pentanol in a mass ratio of 20%, 40%, 15% and 25%, and then dispersing in an ultrasonic crusher at a power of 700 W for 10 min to form a milky white solution; (2) Weigh 300g of ore and put it into a ball mill. Add 100g of tap water to make the grinding concentration reach 75%. The particle size of the grinding product is controlled at -0.074mm, accounting for 60%. The ball-milled sample is placed in a flotation tank and slurried to a pulp concentration of 30%; (3) adding inhibitor CaO, the combined collector and foaming agent No. 2 oil to the flotation tank in sequence, and after sufficient slurry mixing, filling with air for roughing to obtain roughing concentrate and roughing tailings; (4) placing the roughing concentrate in a ball mill to increase the grinding fineness to 85%, sequentially adding the combined collector and the foaming agent No. 2 oil, and filling with air after sufficient slurry mixing for concentration 1, and then performing a second concentration without adding reagents, wherein the concentrate obtained by the last concentration is a copper-molybdenum concentrate, and the roughing tailings are scavenged twice, and the tailings of the last scavenging are copper tailings, and the first concentration tailings are combined with the first scavenging concentrate and returned to the roughing process for re-selection; the second concentration tailings are returned to the first concentration process for re-selection; the second scavenging concentrate is returned to the first scavenging process for re-selection; and finally, the Cu concentrate grade is 22.53%, the Cu recovery rate is 87.25%, and the Mo concentrate grade is 0.21%, and the Mo recovery rate is 74.23%; In the above steps (3) and (4), the amount of inhibitor CaO in the rough selection is 200g / t, the amount of the combined collector is 80g / t, and the amount of No. 2 oil is 30g / t; the amount of the combined collector in the first scavenging is 40g / t, and the amount of No. 2 oil is 15g / t; the amount of the combined collector in the second scavenging is 20g / t, and the amount of No. 2 oil is 10g / t; the amount of the combined collector in the first fine selection is 10g / t, and the amount of No. 2 oil is 5g / t.

4. The use of the combined collector for copper-molybdenum mixed flotation according to claim 1, characterized in that: The ore raw material is molybdenum-containing porphyry copper ore, which contains 0.42% copper and 0.007% molybdenum. The target metals are copper and molybdenum. Copper is found in chalcopyrite and chalcocite, molybdenum is found in molybdenite, and the gangue minerals are serpentine and chlorite.

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