A beneficiation method for high-carbon copper sulfide ore

Abstract

The present invention relates to the technical field of mineral metallurgy processing and provides a beneficiation method for high-carbon copper sulfide ore, comprising: grinding; roughing to obtain a copper rough concentrate and rougher tailings; scavenging the rougher tailings I to obtain a copper scavenged concentrate I and a first scavenged tailings; scavenging the first scavenged tailings II to obtain a copper scavenged concentrate II and a second scavenged tailings; concentrating the copper rougher concentrate I to obtain a copper concentrate I and a concentrating tailings I; concentrating the copper concentrate I II to obtain a copper concentrate II and a concentrating tailings II; combining the copper scavenged concentrate I and the concentrating tailings I and returning them to the roughing, returning the copper scavenged concentrate II to the scavenging I, and returning the concentrating tailings II to the concentrating I; and adding collectors such as sodium butyl xanthate, sodium amyl xanthate, and butylammonium nitrofuran, and frothers such as neutral oil and No. 2 oil, during the roughing, scavenging, and II processes. The present invention can reduce the amount of reagents used and the cost in the beneficiation process of high-carbon copper sulfide ore, and achieve a high concentrate grade and copper and cobalt recovery rate.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral metallurgy processing, in particular to a beneficiation method for high-carbon copper sulfide ore. Background Art

[0002] Copper ore resources, as a crucial strategic resource for the industrialization process, are widely used in various industries and fields, playing a decisive role in socio-economic development and occupying a significant position in my country's mineral resources. Copper sulfide ore is an important copper resource, and copper-sulfur symbiosis is the most common type of copper sulfide stone. Among them, organic carbon-rich copper sulfide ores are complex and difficult to process, due to the fact that their organic carbon is dispersed as fine particles in carbonaceous slate, the copper minerals are unevenly embedded in the particle size, and the degree of monomer dissociation is poor. The copper sulfide minerals are severely intertwined with the organic carbon and with the gangue minerals, resulting in low comprehensive utilization rates. Although there have been some developments in the beneficiation technology for difficult-to-process copper sulfide ores in recent years, relatively few technologies are targeted at this type of high-carbon copper sulfide ore. Furthermore, the amount of reagents used and the cost of the beneficiation technology for this complex and difficult-to-process high-carbon copper-sulfide ore are too high, resulting in poor concentrate grade and recovery rates. Summary of the Invention

[0003] In response to the problems existing in the prior art, the present invention provides a beneficiation method for high-carbon copper sulfide ore, which can reduce the dosage and cost of reagents in the beneficiation process of high-carbon copper sulfide ore, and obtain a higher concentrate grade and a comprehensive recovery rate of copper and cobalt.

[0004] The technical solution of the present invention is:

[0005] A method for beneficiating high-carbon copper sulfide ore comprises the following steps:

[0006] Step 1: Grinding

[0007] Crushing and grinding the copper sulfide ore to a particle size of -0.074 mm, accounting for 75-80%, and adding water to adjust the slurry to a slurry concentration of 30-35% and a pH value of 7-8;

[0008] Step 2: Rough Selection

[0009] Add copper mineral collector LS-01 to the slurry and stir for 2-3 minutes; add foaming agent TZ-01 and stir for 1-2 minutes to perform roughing of copper sulfide minerals. The roughing time is 11-15 minutes to obtain copper rough concentrate and roughing tailings.

[0010] Step 3: Scan I

[0011] Add collector LS-01 to the roughing tailings and stir for 2-3 minutes; add frother TZ-01 and stir for 1-2 minutes, and then carry out the first copper sulfide scavenging for 7-11 minutes to obtain copper scavenging concentrate I and the first scavenging tailings;

[0012] Step 4: Scan II

[0013] Add collector LS-01 to the first scavenging tailings and stir for 2-3 minutes; add frother TZ-01 and stir for 1-2 minutes, then carry out the second copper sulfide scavenging for 5-7 minutes to obtain copper scavenging concentrate II and the second scavenging tailings;

[0014] Step 5: Selection I

[0015] The copper concentrate is firstly cleaned by stirring the pulp for 2-3 minutes and then flotation. The flotation time is 7-9 minutes to obtain copper concentrate I and cleaned tailings I.

[0016] Step 6: Selection II

[0017] The copper concentrate I is subjected to a second concentration, and the slurry is stirred for 2-3 minutes for flotation, and the flotation time is 5-7 minutes to obtain copper concentrate II and concentrated tailings II;

[0018] Step 7: Closed Loop

[0019] The slurry formed by combining the copper scavenging concentrate I and the beneficiated tailings I is returned to step 2 for roughing operation, the copper scavenging concentrate II is returned to step 3 for scavenging operation, and the beneficiated tailings II is returned to step 5 for beneficiation operation;

[0020] The collector LS-01 is composed of a mixture of butyl sodium xanthate, amyl sodium xanthate, and butyl ammonium xanthate;

[0021] The foaming agent TZ-01 is composed of a mixture of neutral oil and 2# oil.

[0022] Furthermore, the total dosage of the collector LS-01 is 1400-1600 g / t, and the mass ratio of butyl sodium xanthate, amyl sodium xanthate, and butylammonium xanthate in the collector LS-01 is 8:1:1.

[0023] Furthermore, the collector LS-01 is prepared by mixing butyl sodium xanthate, amyl sodium xanthate, and butyl ammonium xanthate, adding distilled water and stirring for 5-10 minutes at room temperature and pressure.

[0024] Furthermore, the total usage of the foaming agent TZ-01 is 650-750 g / t, and the mass ratio of neutral oil to 2# oil in the foaming agent TZ-01 is 2:1.

[0025] Furthermore, the foaming agent TZ-01 is prepared by mixing neutral oil and 2# oil and stirring the mixture at room temperature and pressure for 5-10 minutes.

[0026] Among them, the copper sulfide mineral is mainly chalcopyrite, with a mass fraction of chalcopyrite of 1.8-2.1%; the cobalt mineral is mainly pyroxenite, followed by arsenic cobaltite and hydrocobaltite; the gangue mineral is mainly dolomite, followed by sericite and quartz, which are rich in organic carbon. The organic carbon is dispersed in the carbonaceous slate in the form of fine particles, and the organic carbon content is ≥4%.

[0027] The beneficial effects of the present invention are:

[0028] (1) The present invention performs one roughing operation, two scavenging operations, and two concentrating operations after grinding, and returns the copper scavenging concentrate I and the concentrating tailings I to the roughing operation after merging, returns the copper scavenging concentrate II to the first scavenging operation, and returns the concentrating tailings II to the first concentrating operation. At the same time, a collector LS-01 composed of a mixture of butyl sodium xanthate, amyl sodium xanthate, and butyl ammonium black medicine and a frother TZ-01 composed of a mixture of neutral oil and 2# oil are used. The amount of reagents used and the cost of reagents in the beneficiation process of high-carbon copper sulfide ore with an organic carbon content of ≥4% can be reduced, a higher concentrate grade and a comprehensive recovery rate of copper and cobalt are obtained, and an economic reference solution is provided for the separation of high-carbon copper sulfide ore. The technical problems in the prior art of difficulty in copper flotation, high reagent usage and cost, and low copper beneficiation indicators when the organic carbon content is ≥4% are solved.

[0029] (2) The present invention adopts an optimized reagent combination and reagent addition amount, which effectively avoids excessive consumption of reagents and the impact on separation indicators caused by organic carbon, a substance unique to high-carbon copper sulfide ore.

[0030] (3) The collector used in the present invention is prepared by mixing sodium butyl xanthate, sodium amyl xanthate and butyl ammonium black medicine. The collector has a good comprehensive collecting effect and a small amount of use. Among them, xanthate has the characteristics of strong collecting performance and low price. At the same time, high-grade xanthate has stronger collecting performance and certain foaming properties, which is beneficial to improving the mineral processing recovery rate; the collecting performance of butyl ammonium black medicine is similar to that of xanthate, but its collecting ability is weaker than that of xanthate, while its selectivity is stronger than that of xanthate, especially its collecting ability for pyrite is very weak, which is beneficial to improving the concentrate grade; the present invention optimizes the combination of these three collectors, and under the optimized ratio conditions, a complementary interaction is generated, which can improve the concentrate grade and recovery rate, while reducing the reagent cost, solving the technical problem of poor copper mineral processing indicators caused by poor collector selectivity in the copper flotation process.

[0031] (4) The foaming agent used in the present invention is prepared by mixing neutral oil and 2# oil, which has good foaming effect and requires less amount. Among them, neutral oil molecules first adhere to the surface of 2# oil. Since neutral oil is hydrophobic, the neutral oil wrapped on the outer surface reduces the contact area between 2# oil and slurry. At the same time, neutral oil itself has certain capture properties and is selectively adsorbed on the surface of carbonaceous particles, which not only reduces the consumption of 2# oil but also improves the flotation environment, solving the technical problems of large amounts of organic carbon adsorbing agents, large amounts of agents, and poor foaming effect.

[0032] (5) The entire process of the present invention is coordinated with the components and ratios of the collector and frother to form a whole, which can efficiently sort complex and difficult-to-select high-carbon copper-sulfur ores. Not only is the process technology simple, adaptable and operable, but the mineral processing indicators are excellent, the production cost is low, and it is beneficial to energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure is a process flow chart of the beneficiation method of high-carbon copper sulfide ore of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] In Example 1, the raw ore is a high-carbon copper sulfide ore, including copper sulfide minerals, cobalt minerals, and gangue minerals, containing 2.55% copper, 0.051% cobalt, and 4.5% organic carbon. The copper sulfide minerals are primarily chalcopyrite, followed by chalcocite, with minor amounts of bornite and covellite, and very minor amounts of copper oxide minerals, including chelonite, cuprite, native copper, malachite, and chrysocolla. The cobalt minerals are primarily pyrite, followed by arsenic cobaltite and hydrocobaltite. Limonite and psilomelane both contain cobalt. The only other sulfide mineral is a small amount of pyrite. The gangue minerals are primarily dolomite, followed by sericite and quartz, and are rich in organic carbon, which is dispersed as fine particles in the carbonaceous slate.

[0037] 8 g of butyl sodium xanthate, 1 g of amyl sodium xanthate and 1 g of butyl ammonium xanthate were mixed, dissolved in 100 ml of distilled water in a beaker at room temperature and pressure, and stirred with a magnetic stirrer for 10 minutes to obtain collector LS-01.

[0038] 10 g of neutral oil and 5 g of 2# oil were stirred in a beaker as a container with a magnetic stirrer at room temperature and pressure for 10 minutes to obtain foaming agent TZ-01.

[0039] It should be noted that in all the embodiments, the collector used in each step is a prepared aqueous solution, and the foaming agent is added as a stock solution; the dosage of the reagents is calculated per ton of raw ore.

[0040] like Figure 1 As shown, in this embodiment 1, the beneficiation method of high-carbon copper sulfide ore of the present invention includes the following steps:

[0041] Step 1: Grinding

[0042] Crushing and grinding the copper sulfide ore to fully separate the useful minerals from the gangue minerals in the copper sulfide ore. Weigh 600g of dry ore in a conical ball mill XMQ-Φ240×90, add 300ml of water, grind the ore to a concentration of 66.67%, and grind the ore until the copper sulfide ore particle size is -0.074mm, accounting for 75%. Add water to adjust the slurry to a concentration of 30% and a pH of 7.

[0043] Step 2: Rough Selection

[0044] 850 g / t of copper mineral collector LS-01 was added to the slurry and stirred for 2 minutes; 370 g / t of foaming agent TZ-01 was added and stirred for 1 minute, and roughing of copper sulfide minerals was carried out for 11 minutes to obtain copper rough concentrate and roughing tailings;

[0045] Step 3: Scan I

[0046] 335 g / t of collector LS-01 was added to the rougher tailings and stirred for 2 min; 190 g / t of frother TZ-01 was added and stirred for 1 min, and the first copper sulfide scavenging was carried out for 7 min to obtain copper scavenging concentrate I and the first scavenging tailings;

[0047] Step 4: Scan II

[0048] Add 215g / t of collector LS-01 to the first scavenging tailings and stir for 2 minutes; add 90g / t of foaming agent TZ-01 and stir for 1 minute. Then carry out the second copper sulfide scavenging for 5 minutes to obtain copper scavenging concentrate II and the second scavenging tailings.

[0049] Step 5: Selection I

[0050] The copper rough concentrate was first concentrated. The pulp was stirred for 2 minutes and then flotated. The flotation time was 7 minutes to obtain copper concentrate I and concentrated tailings I.

[0051] Step 6: Selection II

[0052] The copper concentrate I was subjected to a second concentration, and the pulp was stirred for 2 minutes for flotation, and the flotation time was 5 minutes to obtain copper concentrate II and concentrated tailings II;

[0053] Step 7: Closed Loop

[0054] The slurry obtained by combining the copper scavenging concentrate I and the concentrated tailings I is returned to step 2 for roughing operation, the copper scavenging concentrate II is returned to step 3 for scavenging operation, and the concentrated tailings II is returned to step 5 for concentrating operation.

[0055] In this Example 1, the grades and recovery rates of Cu and Co in the final copper-cobalt concentrate and tailings are shown in Table 1. As can be seen from Table 1, the copper grade of the copper-cobalt concentrate obtained by the mineral processing method of the present invention is 30.12%, the cobalt grade is 0.57%, the copper recovery rate is 92.05%, and the cobalt recovery rate is 82.82%.

[0056] Table 1

[0057]

[0058] Example 2

[0059] In this embodiment 2, the beneficiation method of high-carbon copper sulfide ore of the present invention includes the following steps:

[0060] Step 1: Grinding

[0061] Crushing and grinding the copper sulfide ore to fully separate the useful minerals from the gangue minerals in the copper sulfide ore. Weigh 600g of dry ore in a conical ball mill XMQ-Φ240×90, add 300ml of water, grind the ore to a concentration of 66.67%, and grind the ore until the copper sulfide ore particle size is -0.074mm, accounting for 77.5%. Add water to adjust the slurry to a concentration of 32% and a pH of 7.6.

[0062] Step 2: Rough Selection

[0063] 900 g / t of copper mineral collector LS-01 was added to the slurry and stirred for 2.5 minutes; 400 g / t of foaming agent TZ-01 was added and stirred for 1.5 minutes, and the copper sulfide mineral was roughly separated for 13 minutes to obtain copper rough concentrate and roughing tailings;

[0064] Step 3: Scan I

[0065] 400 g / t of collector LS-01 was added to the rougher tailings and stirred for 2.5 min; 200 g / t of frother TZ-01 was added and stirred for 1.5 min, and the first copper sulfide scavenging was carried out for 9 min to obtain copper scavenging concentrate I and the first scavenging tailings;

[0066] Step 4: Scan II

[0067] Add 200g / t of collector LS-01 to the first scavenging tailings and stir for 2.5min; add 100g / t of foaming agent TZ-01 and stir for 1.5min, then carry out the second copper sulfide scavenging for 6min to obtain copper scavenging concentrate II and the second scavenging tailings;

[0068] Step 5: Selection I

[0069] The copper concentrate was first concentrated. The pulp was stirred for 2.5 minutes and then flotated. The flotation time was 8 minutes, and copper concentrate I and concentrated tailings I were obtained.

[0070] Step 6: Selection II

[0071] The copper concentrate I was subjected to a second concentration, and the pulp was stirred for 2.5 minutes before flotation. The flotation time was 6 minutes, and copper concentrate II and concentrated tailings II were obtained.

[0072] Step 7: Closed Loop

[0073] The slurry obtained by combining the copper scavenging concentrate I and the concentrated tailings I is returned to step 2 for roughing operation, the copper scavenging concentrate II is returned to step 3 for scavenging operation, and the concentrated tailings II is returned to step 5 for concentrating operation.

[0074] In this Example 2, the grades and recovery rates of Cu and Co in the final copper-cobalt concentrate and tailings are shown in Table 2. As can be seen from Table 2, the copper grade of the copper-cobalt concentrate obtained by the mineral processing method of the present invention is 29.90%, the cobalt grade is 0.54%, the copper recovery rate is 92.42%, and the cobalt recovery rate is 82.22%.

[0075] Table 2

[0076]

[0077] Example 3

[0078] In this embodiment 3, the beneficiation method of high-carbon copper sulfide ore of the present invention includes the following steps:

[0079] Step 1: Grinding

[0080] Crushing and grinding the copper sulfide ore to fully separate the useful minerals from the gangue minerals in the copper sulfide ore. Weigh 600g of dry ore in a conical ball mill XMQ-Φ240×90, add 300ml of water, grind the ore to a concentration of 66.67%, and grind until the copper sulfide ore particle size is -0.074mm, accounting for 80%. Add water to adjust the slurry to a concentration of 35% and a pH of 8.

[0081] Step 2: Rough Selection

[0082] 950 g / t of copper mineral collector LS-01 was added to the slurry and stirred for 3 minutes; 425 g / t of foaming agent TZ-01 was added and stirred for 2 minutes, and roughing of copper sulfide minerals was carried out for 15 minutes to obtain copper rough concentrate and roughing tailings;

[0083] Step 3: Scan I

[0084] 425 g / t of collector LS-01 was added to the rougher tailings and stirred for 3 minutes; 215 g / t of frother TZ-01 was added and stirred for 2 minutes. The first copper sulfide scavenging was carried out for 11 minutes to obtain copper scavenging concentrate I and the first scavenging tailings.

[0085] Step 4: Scan II

[0086] Add 225g / t of collector LS-01 to the first scavenging tailings and stir for 3 minutes; add 110g / t of foaming agent TZ-01 and stir for 2 minutes, then carry out the second copper sulfide scavenging for 7 minutes to obtain copper scavenging concentrate II and the second scavenging tailings;

[0087] Step 5: Selection I

[0088] The copper rough concentrate was first concentrated. The pulp was stirred for 3 minutes and then flotated. The flotation time was 9 minutes, and copper concentrate I and concentrated tailings I were obtained.

[0089] Step 6: Selection II

[0090] The copper concentrate I was subjected to a second concentration, and the pulp was stirred for 3 minutes before flotation, and the flotation time was 7 minutes to obtain copper concentrate II and concentrated tailings II;

[0091] Step 7: Closed Loop

[0092] The slurry obtained by combining the copper scavenging concentrate I and the concentrated tailings I is returned to step 2 for roughing operation, the copper scavenging concentrate II is returned to step 3 for scavenging operation, and the concentrated tailings II is returned to step 5 for concentrating operation.

[0093] In this Example 3, the grades and recovery rates of Cu and Co in the final copper-cobalt concentrate and tailings are shown in Table 3. As can be seen from Table 3, the copper grade of the copper-cobalt concentrate obtained by the mineral processing method of the present invention is 29.72%, the cobalt grade is 0.53%, the copper recovery rate is 92.78%, and the cobalt recovery rate is 82.09%.

[0094] Table 3

[0095]

[0096] In the above three embodiments, the high-carbon copper sulfide ore beneficiation method of the present invention is used to beneficiate high-carbon copper sulfide ore, and higher concentrate grade and recovery rate indicators are achieved while reducing the amount of reagents used. It can be seen that the present invention performs one roughing, two scavenging and two concentrating operations after grinding, and merges the copper scavenging concentrate I and the concentrating tailings I and returns them to the roughing operation, returns the copper scavenging concentrate II to the first scavenging operation, and returns the concentrating tailings II to the first concentrating operation. At the same time, the collector LS-01 composed of a mixture of butyl sodium xanthate, amyl sodium xanthate and butyl ammonium black medicine and the frother TZ-01 composed of a mixture of neutral oil and 2# oil are used. The dosage and cost of the reagents in the beneficiation process of high-carbon copper sulfide ore with an organic carbon content of ≥4% can be reduced, and a higher concentrate grade and copper-cobalt comprehensive recovery rate can be obtained. The economic reference solution is provided for the separation of high-carbon copper sulfide ore, and the technical problems in the prior art of difficulty in copper flotation when the organic carbon content is ≥4%, excessively high dosage and cost of the reagents, and low copper beneficiation indicators are solved.

[0097] Obviously, the above embodiments are only some embodiments of the present invention, rather than all embodiments. The above embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by the present invention.

Claims

1. A beneficiation method for high-carbon copper sulfide ore, characterized in that: The steps include: Step 1: Grinding Crushing and grinding copper sulfide ore to a particle size of -0.074 mm, accounting for 75-80%, and adding water to adjust the slurry to a slurry concentration of 30-35% and a pH value of 7-8; the copper sulfide ore includes chalcopyrite, cobalt minerals, and gangue minerals; the mass fraction of the chalcopyrite is 1.8-2.1%; the cobalt minerals include pyrocobaltite, pyrocobaltite, and hydrocobaltite; the gangue minerals include dolomite, sericite, quartz, and organic carbon, wherein the organic carbon is dispersed in the carbonaceous slate as fine particles, and the organic carbon content is ≥4%; Step 2: Rough Selection Add copper mineral collector LS-01 to the slurry and stir for 2-3 minutes; add foaming agent TZ-01 and stir for 1-2 minutes to perform roughing of copper sulfide minerals. The roughing time is 11-15 minutes to obtain copper rough concentrate and roughing tailings. Step 3: Scan I Add collector LS-01 to the roughing tailings and stir for 2-3 minutes; add frother TZ-01 and stir for 1-2 minutes, and then carry out the first copper sulfide scavenging for 7-11 minutes to obtain copper scavenging concentrate I and the first scavenging tailings; Step 4: Scan II Add collector LS-01 to the first scavenging tailings and stir for 2-3 minutes; add frother TZ-01 and stir for 1-2 minutes, then carry out the second copper sulfide scavenging for 5-7 minutes to obtain copper scavenging concentrate II and the second scavenging tailings; Step 5: Selection I The copper concentrate is firstly cleaned. The pulp is stirred for 2-3 minutes and then flotated. The flotation time is 7-9 minutes to obtain copper concentrate I and cleaned tailings I. Step 6: Selection II The copper concentrate I is subjected to a second concentration, the pulp is stirred for 2-3 minutes and then flotation is performed. The flotation time is 5-7 minutes to obtain copper concentrate II and concentrated tailings II. Step 7: Closed Loop The slurry formed by combining the copper scavenging concentrate I and the beneficiated tailings I is returned to step 2 for roughing operation, the copper scavenging concentrate II is returned to step 3 for scavenging operation, and the beneficiated tailings II is returned to step 5 for beneficiation operation; The collector LS-01 is composed of a mixture of butyl sodium xanthate, amyl sodium xanthate, and butyl ammonium black medicine; the total dosage of the collector LS-01 is 1400-1600 g / t, and the mass ratio of butyl sodium xanthate, amyl sodium xanthate, and butyl ammonium black medicine in the collector LS-01 is 8:1:1; The foaming agent TZ-01 is composed of a mixture of neutral oil and 2# oil; the total usage of the foaming agent TZ-01 is 650-750 g / t, and the mass ratio of neutral oil to 2# oil in the foaming agent TZ-01 is 2:

1.

2. The beneficiation method of high-carbon copper sulfide ore according to claim 1, characterized in that: The collector LS-01 is prepared by mixing sodium butyl xanthate, sodium amyl xanthate and butyl ammonium xanthate, adding distilled water and stirring for 5-10 minutes at normal temperature and pressure.

3. The beneficiation method of high-carbon copper sulfide ore according to claim 1, characterized in that: The foaming agent TZ-01 is prepared by mixing neutral oil and 2# oil and stirring them at normal temperature and pressure for 5-10 minutes.

Images