Method for the enhanced activation of carbonate type copper oxide ores by flotation

Abstract

The application discloses a kind of carbonate type copper oxide ore intensification activation flotation method, belong to mineral processing technical field.The single copper reagent activation flotation method exists activation effect, collector is difficult to stable adsorption, excessive serious inhibition copper oxide ore flotation etc., the application uses NH3·H2O and copper reagent synergic activation to take malachite or azurite as main carbonate type copper oxide ore.The ore is crushed, grinds ore after pulp preparation, obtains the slurry to be floated, first NH3·H2O is added to the slurry and is pretreated, then copper reagent is added to activate copper oxide ore, and after activation, collector, frother is sequentially added to recover copper oxide mineral in ore.The number of active sites on the surface of the mineral is increased by NH3·H2O and copper reagent synergic activation of copper oxide, which promotes the stable adsorption of xanthate collector on the surface of the mineral, realizes the intensification activation of copper oxide mineral in the ore, reduces the dosage of copper reagent, improves the recovery rate of copper oxide ore flotation, and reduces the cost of mineral processing.

Description

TECHNICAL FIELD

[0001] The application relates to a carbonate-type copper oxide ore intensified activation and flotation method and belongs to the technical field of mineral processing. BACKGROUND

[0002] Copper is one of the earliest discovered and used metals, and copper and its alloys are widely used in the fields of energy, transportation, electricity and the like due to excellent electrical conductivity, thermal conductivity and wear resistance. At present, copper sulfide ore is still the main raw material for copper smelting. However, with the continuous advancement of global industrialization, the contradiction between supply and demand of copper resources and copper materials will be increasingly intensified, and copper sulfide ore is difficult to meet the growing demand for copper resources. Efficient development and utilization of copper oxide ore, as one of the important copper ore resources, undoubtedly is an important supplement to copper metal resources and is also an important research direction of mineral processing workers.

[0003] At present, carbonate-type copper oxide ore (malachite, azurite) is the most widely distributed copper oxide mineral. For the recovery of such minerals, the most widely used in the industry is still the sulfidation-xanthate flotation method, that is, a sulfidation agent such as Na2S, NaHS is used to modify the surface of the carbonate-type copper oxide ore to generate a thin film of copper sulfide compound with strong hydrophobicity, and then a xanthate collector is added for recovery. In recent years, some organic chelating agents have been used to activate complex and refractory copper oxide ores due to their strong chelating ability to metal ions and high selectivity, such as D2, 8-hydroxyquinoline and triethanolamine. Among them, D2 has been used in industrial production due to its small dosage, fast flotation speed and strong adaptability.

[0004] 2,5-dimercapto-134-thiadiazole (Chinese name: copper test reagent, English name: DMTD) is the main active ingredient of D2, which is a white to light yellow crystal powder and is commonly used for the detection of bismuth, copper, lead, palladium and antimony. In particular, it can react with copper to generate a brown precipitate. Copper test reagent is an excellent activator for carbonate-type copper oxide ore and has been successfully applied to industrial production, which can increase the flotation recovery rate of carbonate-type copper oxide ore by nearly 50%. However, the dosage range of copper test reagent is relatively narrow. When the dosage is low, it is difficult to effectively activate the copper oxide ore, and when the dosage is high, it will seriously inhibit the flotation recovery of the copper oxide ore, resulting in that the production cannot be carried out normally. Although theoretical research shows that the solid-liquid separation method can improve the problem of excessive copper test reagent inhibiting the flotation of copper oxide ore to a certain extent, this method cannot be applied to industrial production due to environmental protection and cost problems. Therefore, it is of great significance to the industrial production to deeply study the activation process of carbonate-type copper oxide ore, to directionally control the state of the mineral surface activation product, to intensify the activation effect of the activator and to broaden the dosage range of the activator. SUMMARY

[0005] The present application aims at the problems of poor activation effect, difficult stable adsorption of collector, and serious inhibition of flotation of copper oxide ore in direct activation flotation method of copper reagent, and provides a kind of carbonate type copper oxide ore enhanced activation flotation method, that is, adding adjusting agent NH3·H2O to treat carbonate type copper oxide ore before activation, which can change the mineral surface properties and pulp solution components, then adding activator copper reagent, the pretreatment of NH3·H2O enhances the activation effect of copper reagent on carbonate type copper oxide ore, and finally adding collector and frother in turn to recover copper minerals in the ore.

[0006] A kind of carbonate type copper oxide ore enhanced activation flotation method, the specific steps are as follows:

[0007] (1) after crushing, grinding and pulp preparation of copper oxide ore, a slurry for flotation is obtained;

[0008] (2) adjusting agent, activator, collector and frother are added in turn to the slurry of step (1) to carry out a roughing operation, to obtain a roughing concentrate and a roughing tailings;

[0009] (3) adjusting agent, activator, collector and frother are added in turn to the roughing tailings of step (2) to carry out a scavenging operation, to obtain a scavenging concentrate and a scavenging tailings; the scavenging concentrate is returned and added to the roughing operation, adjusting agent, activator, collector and frother are added in turn to the scavenging tailings to carry out a secondary scavenging operation, to obtain a secondary scavenging concentrate and a secondary scavenging tailings, the secondary scavenging concentrate is returned and added to the scavenging operation, and the secondary scavenging tailings are the final tailings;

[0010] (4) collector and frother are added to the roughing concentrate of step (2) to carry out a cleaning operation, to obtain a cleaning concentrate and a cleaning tailings, the cleaning tailings are returned and added to the roughing operation; collector is added to the cleaning concentrate to carry out a secondary cleaning operation, to obtain a secondary cleaning concentrate and a secondary cleaning tailings, the secondary cleaning tailings are returned and added to the cleaning operation; the secondary cleaning concentrate is subjected to a third blank cleaning operation, to obtain a third cleaning concentrate and a third cleaning tailings, the third cleaning tailings are returned and added to the secondary cleaning operation, and the third cleaning concentrate is the copper oxide concentrate.

[0011] The mass percentage content of copper in the copper oxide ore of step (1) is 0.5-4.5%.

[0012] In the roughing operation of step (2), the amount of adjusting agent added is 100-500 g per ton of copper oxide ore, the amount of activator added is 100-500 g, the amount of collector added is 50-400 g, and the amount of frother added is 20-80 g.

[0013] The amount of reagent added to the primary roughing tailings in step (3) is 100-300 g of conditioning agent, 100-300 g of activating agent, 50-300 g of collecting agent and 20-50 g of frother per ton of copper oxide ore. The amount of reagent added to the primary scavenging tailings is 100-200 g of conditioning agent, 100-200 g of activating agent, 50-200 g of collecting agent and 20-40 g of frother per ton of copper oxide ore.

[0014] The amount of reagent added to the primary roughing concentrate in step (4) is 50-200 g of collecting agent and 10-50 g of frother per ton of copper oxide ore. The amount of reagent added to the primary cleaning concentrate is 50-100 g of collecting agent.

[0015] The conditioning agent is NH3·H2O, the activating agent is DMTD, the collecting agent is butyl xanthate and the frother is pine oil. The mass ratio of the conditioning agent NH3·H2O to the activating agent DMTD added in the ore pulp is (1-2):1.

[0016] The present application pre-treats the carbonate type copper oxide mineral with NH3·H2O, which on one hand strengthens the activation effect of the subsequently added activating agent DMTD, greatly increases the content of active components on the mineral surface, enhances the stability of the activated product on the mineral surface, thereby promotes the adsorption of the collecting agent on the mineral surface and realizes the strengthened activation and efficient recovery of the carbonate type copper oxide mineral in the ore. On the other hand, the colloid product in the solution is greatly reduced due to the regulation of NH3·H2O, which greatly improves the flotation environment of the carbonate type copper oxide mineral, effectively solves the technical problem of the inhibition of the mineral floating by excessive activating agent, widens the dosage range of the activating agent and ensures the stability of the beneficiation indexes in industrial production.

[0017] The beneficial effects of the present application are:

[0018] (1) The present application pre-treats the carbonate type copper oxide mineral with NH3·H2O, which strengthens the activation effect of the subsequently added activating agent DMTD, greatly increases the content of active components on the mineral surface, enhances the stability of the activated product on the mineral surface, thereby promotes the adsorption of the collecting agent on the mineral surface and realizes the strengthened activation and efficient recovery of the carbonate type copper oxide mineral in the ore.

[0019] (2) The present application pre-treats the carbonate type copper oxide mineral with NH3·H2O, which strengthens the activation effect of the subsequently added activating agent DMTD, greatly increases the content of active components on the mineral surface, enhances the stability of the activated product on the mineral surface, thereby promotes the adsorption of the collecting agent on the mineral surface and realizes the strengthened activation and efficient recovery of the carbonate type copper oxide mineral in the ore.

[0020] (3) The NH3·H2O-DMTD activation system adopted in the application greatly improves the flotation recovery rate of the carbonate type copper oxide ore, and green and efficient economic solution is provided for the difficult recovery problem of the complex and difficult carbonate type copper oxide ore, and the economic, social and environmental benefits are remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The process flow chart of the application is shown in the following. DETAILED DESCRIPTION

[0022] The application will be further described in detail below in combination with specific examples, but the protection scope of the application is not limited to the described content.

[0023] The adjusting agent in the following examples of the application is NH3·H2O, the activation agent is the test reagent, the collecting agent is butyl xanthate, and the frother is pine oil. The mass ratio of the adjusting agent NH3·H2O to the activation agent test reagent added in the ore pulp is (1-2):1.

[0024] Example 1: In this example 1, a flotation separation test is conducted on a certain copper oxide ore in Yunnan, and the raw ore contains 1.25% of Cu. The copper in the ore mainly exists in the form of malachite, and the gangue minerals mainly include quartz, pyrite, dolomite and feldspar.

[0025] Comparative Example 1-1: In this example, a conventional single test reagent is used as the activation agent of the copper oxide ore, and the test flow chart is shown in Figure 1 The specific steps are as follows:

[0026] (1) The copper oxide ore is crushed and finely ground to a mass percentage of 80% of-74 μm particle size, and the pulp is adjusted to a mass percentage concentration of 40%.

[0027] (2) The activation agent test reagent, the collecting agent butyl xanthate and the frother pine oil are sequentially added into the ore pulp of step (1) to perform a first roughing operation, and a first roughing concentrate and a first roughing tailings are obtained; the activation agent 200 g, the collecting agent 100 g and the frother 50 g are added into the ore pulp per ton of copper oxide ore.

[0028] (3) to the tailings of the step (2), add the activator of the agent of the test, the collector of the butyl xanthate and the foaming agent of the pine oil in turn to carry out the first cleaning operation, and obtain the first cleaning concentrate and the first cleaning tailings; the first cleaning concentrate returns and is added into the first roughing operation, and the activator of the agent of the test, the collector of the butyl xanthate and the foaming agent of the pine oil are added in turn in the first cleaning tailings to carry out the second cleaning operation, and obtain the second cleaning concentrate and the second cleaning tailings, and the second cleaning concentrate returns and is added into the first cleaning operation. The amount of the agent added into the first roughing tailings is 175g of the activator, 100g of the collector and 30g of the foaming agent per ton of the copper oxide ore;

[0029] (4) add the collector of the butyl xanthate and the foaming agent of the pine oil into the first cleaning concentrate of the step (2) to carry out the first cleaning operation, and obtain the first cleaning concentrate and the first cleaning tailings, and the first cleaning tailings returns and is added into the first roughing operation; add the collector of the butyl xanthate into the first cleaning concentrate to carry out the second cleaning operation, and obtain the second cleaning concentrate and the second cleaning tailings, and the second cleaning tailings returns and is added into the first cleaning operation; carry out the third blank cleaning operation on the second cleaning concentrate, and obtain the third cleaning concentrate and the third cleaning tailings, and the third cleaning tailings returns and is added into the second cleaning operation. The amount of the agent added into the first roughing concentrate in the step (4) is 100g of the collector and 20g of the foaming agent per ton of the copper oxide ore; and the amount of the agent added into the first cleaning concentrate is 75g of the collector. The test results of the embodiment are shown in Table 1.

[0030] Embodiments 1-2 of the application: in the embodiment, NH3·H2O is used as the adjusting agent, and the agent of the test is used as the activator of the copper oxide ore, and the test flow chart is as shown in Figure 1 The specific steps are as follows:

[0031] (1) the copper oxide ore is crushed and ground to the mass percentage of-74μm particle size of 80%, and the pulp is adjusted to the mass percentage of 40%;

[0032] (2) add the adjusting agent of NH3·H2O, the activator of the agent of the test, the collector of the butyl xanthate and the foaming agent of the pine oil into the pulp of the step (1) in turn to carry out the first roughing operation, and obtain the first roughing concentrate and the first roughing tailings; the amount of the agent added into the pulp is 200g of the adjusting agent, 200g of the activator, 100g of the collector and 50g of the foaming agent per ton of the copper oxide ore;

[0033] (3) to the tailings of the first roughing of step (2), adjusting agent NH3H2O, activator Ag agent, collector butyl xanthate and frother pine oil are added in turn to carry out the first scavenging operation, and the first scavenging concentrate and the first scavenging tailings are obtained; the first scavenging concentrate is returned and added into the first roughing operation, adjusting agent NH3H2O, activator Ag agent, collector butyl xanthate and frother pine oil are added in turn to carry out the second scavenging operation, and the second scavenging concentrate and the second scavenging tailings are obtained, the second scavenging concentrate is returned and added into the first scavenging operation, and the second scavenging tailings are the final tailings; in terms of per ton of copper oxide ore, 175 g of adjusting agent, 175 g of activator, 100 g of collector and 30 g of frother are added into the tailings of the first roughing; the amount of reagents added into the tailings of the first scavenging is 125 g of adjusting agent, 125 g of activator, 75 g of collector and 30 g of frother.

[0034] (4) collector butyl xanthate and frother pine oil are added into the concentrate of the first roughing of step (2) to carry out the first cleaning operation, and the first cleaning concentrate and the first cleaning tailings are obtained, and the first cleaning tailings are returned and added into the first roughing operation; collector butyl xanthate is added into the first cleaning concentrate to carry out the second cleaning operation, and the second cleaning concentrate and the second cleaning tailings are obtained, and the second cleaning tailings are returned and added into the first cleaning operation; the second cleaning concentrate is subjected to the third blank cleaning operation, and the third cleaning concentrate and the third cleaning tailings are obtained, and the third cleaning tailings are returned and added into the second cleaning operation; in terms of per ton of copper oxide ore, 100 g of collector and 20 g of frother are added into the concentrate of the first roughing of step (4), and 75 g of collector is added into the first cleaning concentrate.

[0035] Table 1 test results of example 1

[0036]

[0037]

[0038] The test results of the example are shown in Table 1, and the data in Table 1 show that the NH3H2O-Ag agent system has better activation effect on the carbonate type copper oxide ore, and can achieve more excellent beneficiation indexes.

[0039] Example 2: In this example, a certain copper oxide ore in Jiangxi is subjected to flotation separation test, and the raw ore contains 1.02% of Cu. Copper in the ore mainly exists in the form of malachite, blue copper ore and the like, and gangue minerals mainly include quartz, fayalite, mica and feldspar and the like.

[0040] Comparative example 2-1: In this example, a conventional single Ag agent is used as the activator of the copper oxide ore, and the test flow chart is as shown in Figure 1 The specific steps are as follows:

[0041] (1) The copper oxide ore is crushed and ground to a mass percentage of 75% of -74 μm particle size, and the pulp is adjusted to a mass percentage of 40%.

[0042] (2) The activator Ag agent, the collector butyl xanthate and the frother pinol oil are sequentially added to the pulp of step (1) to perform a first roughing operation, to obtain a first roughing concentrate and a first roughing tailing; the activator is added in an amount of 100 g, the collector is added in an amount of 50 g, and the frother is added in an amount of 20 g per ton of copper oxide ore.

[0043] (3) The activator Ag agent, the collector butyl xanthate and the frother pinol oil are sequentially added to the first roughing tailing of step (2) to perform a first scavenging operation, to obtain a first scavenging concentrate and a first scavenging tailing; the first scavenging concentrate is returned and added to the first roughing operation, and the activator Ag agent, the collector butyl xanthate and the frother pinol oil are sequentially added to the first scavenging tailing to perform a second scavenging operation, to obtain a second scavenging concentrate and a second scavenging tailing, and the second scavenging concentrate is returned and added to the first scavenging operation. The activator is added in an amount of 100 g, the collector is added in an amount of 50 g, and the frother is added in an amount of 20 g per ton of copper oxide ore. The activator is added in an amount of 100 g, the collector is added in an amount of 50 g, and the frother is added in an amount of 20 g to the first scavenging tailing.

[0044] (4) The collector butyl xanthate and the frother pinol oil are added to the first roughing concentrate of step (2) to perform a first cleaning operation, to obtain a first cleaning concentrate and a first cleaning tailing, and the first cleaning tailing is returned and added to the first roughing operation; the collector butyl xanthate is added to the first cleaning concentrate to perform a second cleaning operation, to obtain a second cleaning concentrate and a second cleaning tailing, and the second cleaning tailing is returned and added to the first cleaning operation; the second cleaning concentrate is subjected to a third blank cleaning operation, to obtain a third cleaning concentrate and a third cleaning tailing, and the third cleaning tailing is returned and added to the second cleaning operation. The collector is added in an amount of 50 g, and the frother is added in an amount of 10 g to the first roughing concentrate, and the collector is added in an amount of 50 g to the first cleaning concentrate in step (4). The test results of the embodiment are shown in Table 2.

[0045] Embodiment 2-2 of the application: In this embodiment, NH3·H2O is used as the adjusting agent, and Ag agent is used as the activator for the copper oxide ore, and the test flow chart is as shown in Figure 1 , and the specific steps are as follows:

[0046] (1) The copper oxide ore is crushed and ground to a mass percentage of 75% of -74 μm particle size, and the pulp is adjusted to a mass percentage of 40%.

[0047] (2) To the slurry of step (1), adjusting agent NH3H2O, activating agent bismuth reagent, collector butyl xanthate and frother pine oil were added in sequence to perform a primary roughing operation, to obtain a primary roughing concentrate and a primary roughing tailing; the adjusting agent was added in an amount of 100 g, the activating agent was added in an amount of 100 g, the collector was added in an amount of 50 g, and the frother was added in an amount of 20 g per ton of the oxidized copper ore.

[0048] (3) To the primary roughing tailing of step (2), adjusting agent NH3H2O, activating agent bismuth reagent, collector butyl xanthate and frother pine oil were added in sequence to perform a primary scavenging operation, to obtain a primary scavenging concentrate and a primary scavenging tailing; the primary scavenging concentrate was returned to the primary roughing operation, and adjusting agent NH3H2O, activating agent bismuth reagent, collector butyl xanthate and frother pine oil were added in sequence to the primary scavenging tailing to perform a secondary scavenging operation, to obtain a secondary scavenging concentrate and a secondary scavenging tailing, and the secondary scavenging concentrate was returned to the primary scavenging operation. The adjusting agent was added in an amount of 100 g, the activating agent was added in an amount of 100 g, the collector was added in an amount of 50 g, and the frother was added in an amount of 20 g per ton of the oxidized copper ore. The adjusting agent was added in an amount of 100 g, the activating agent was added in an amount of 100 g, the collector was added in an amount of 50 g, and the frother was added in an amount of 20 g to the primary scavenging tailing.

[0049] (4) To the primary roughing concentrate of step (2), collector butyl xanthate and frother pine oil were added to perform a primary cleaning operation, to obtain a primary cleaning concentrate and a primary cleaning tailing, and the primary cleaning tailing was returned to the primary roughing operation; collector butyl xanthate was added to the primary cleaning concentrate to perform a secondary cleaning operation, to obtain a secondary cleaning concentrate and a secondary cleaning tailing, and the secondary cleaning tailing was returned to the primary cleaning operation; the secondary cleaning concentrate was subjected to a third blank cleaning operation, to obtain a third cleaning concentrate and a third cleaning tailing, and the third cleaning tailing was returned to the secondary cleaning operation. The collector was added in an amount of 50 g, and the frother was added in an amount of 10 g per ton of the oxidized copper ore to the primary roughing concentrate in step (4); the collector was added in an amount of 50 g to the primary cleaning concentrate.

[0050] Table 2 Test results of Example 2

[0051]

[0052]

[0053] The test results of the present example are shown in Table 2, and the data in Table 2 show that, compared with the single bismuth reagent system, under the NH3H2O-bismuth reagent system, the grade of the oxidized copper concentrate is increased by 3.28%, and the recovery rate is increased by 9.78%, and the flotation index is significantly improved.

[0054] Example 3: This example 2 is a flotation separation test on a copper oxide ore in Anhui, the raw ore contains Cu 3.65%. The copper in the ore mainly exists in the form of malachite, blue copper ore, etc., and the gangue minerals mainly include dolomite, pyroxene, feldspar and hornblende, etc.

[0055] Comparative Example 3-1: In this example, a conventional single copper test agent is used as the activator of the copper oxide ore, and the test flow chart is as shown in Figure 1 The specific steps are as follows:

[0056] (1) The copper oxide ore is crushed and ground to a mass percentage of 70% of the -74 μm size fraction, and the pulp is adjusted to a mass percentage of 40%.

[0057] (2) Add the activator copper test agent, the collector butyl xanthate and the frother pinol oil to the pulp of step (1) in turn to carry out a first roughing operation, and obtain a first roughing concentrate and a first roughing tailings; the activator is added to the pulp at a rate of 500 g per ton of copper oxide ore, the collector is added at a rate of 400 g per ton of copper oxide ore, and the frother is added at a rate of 80 g per ton of copper oxide ore.

[0058] (3) Add the activator copper test agent, the collector butyl xanthate and the frother pinol oil to the first roughing tailings of step (2) in turn to carry out a first scavenging operation, and obtain a first scavenging concentrate and a first scavenging tailings; the first scavenging concentrate is returned and added to the first roughing operation, and the activator copper test agent, the collector butyl xanthate and the frother pinol oil are added to the first scavenging tailings in turn to carry out a second scavenging operation, and obtain a second scavenging concentrate and a second scavenging tailings, and the second scavenging concentrate is returned and added to the first scavenging operation. The activator is added to the first roughing tailings at a rate of 300 g per ton of copper oxide ore, the collector is added at a rate of 300 g per ton of copper oxide ore, and the frother is added at a rate of 50 g per ton of copper oxide ore. The amount of reagents added to the first scavenging tailings is 200 g of activator, 200 g of collector and 40 g of frother per ton of copper oxide ore.

[0059] (4) Add the collector butyl xanthate and the frother pinol oil to the first roughing concentrate of step (2) to carry out a first cleaning operation, and obtain a first cleaning concentrate and a first cleaning tailings, and the first cleaning tailings is returned and added to the first roughing operation; add the collector butyl xanthate to the first cleaning concentrate to carry out a second cleaning operation, and obtain a second cleaning concentrate and a second cleaning tailings, and the second cleaning tailings is returned and added to the first cleaning operation; carry out a third blank cleaning operation on the second cleaning concentrate, and obtain a third cleaning concentrate and a third cleaning tailings, and the third cleaning tailings is returned and added to the second cleaning operation. The amount of reagents added to the first roughing concentrate in step (4) is 200 g of collector and 50 g of frother per ton of copper oxide ore, and the amount of reagents added to the first cleaning concentrate is 100 g of collector per ton of copper oxide ore. The test results of this example are shown in Table 3.

[0060] Embodiment 3-2 of the present application: in this embodiment, NH3·H2O is used as the adjusting agent, and the trial flow chart is shown in Fig. 3, and the specific steps are as follows: Figure 1

[0061] (1) The copper oxide ore is crushed and ground to a mass percentage of 70% of-74 μm particle size, and the pulp is adjusted to a mass percentage of 40%;

[0062] (2) The adjusting agent NH3·H2O, the activating agent tellurium reagent, the collector butyl xanthate, and the frother pinol oil are sequentially added to the pulp in step (1) to perform a primary roughing operation, and a primary roughing concentrate and a primary roughing tailing are obtained; in terms of per ton of copper oxide ore, the adjusting agent 500 g, the activating agent 500 g, the collector 400 g, and the frother 80 g are added to the pulp.

[0063] (3) The adjusting agent NH3·H2O, the activating agent tellurium reagent, the collector butyl xanthate, and the frother pinol oil are sequentially added to the primary roughing tailing in step (2) to perform a primary scavenging operation, and a primary scavenging concentrate and a primary scavenging tailing are obtained; the primary scavenging concentrate is returned and added to the primary roughing operation, and the adjusting agent NH3·H2O, the activating agent tellurium reagent, the collector butyl xanthate, and the frother pinol oil are sequentially added to the primary scavenging tailing to perform a secondary scavenging operation, and a secondary scavenging concentrate and a secondary scavenging tailing are obtained, and the secondary scavenging concentrate is returned and added to the primary scavenging operation; in terms of per ton of copper oxide ore, the adjusting agent 300 g, the activating agent 300 g, the collector 300 g, and the frother 50 g are added to the primary roughing tailing, and the adjusting agent 200 g, the activating agent 200 g, the collector 200 g, and the frother 40 g are added to the primary scavenging tailing.

[0064] (4) The collector butyl xanthate and the frother pinol oil are added to the primary roughing concentrate in step (2) to perform a primary concentration operation, and a primary concentration concentrate and a primary concentration tailing are obtained, and the primary concentration tailing is returned and added to the primary roughing operation; the collector butyl xanthate is added to the primary concentration concentrate to perform a secondary concentration operation, and a secondary concentration concentrate and a secondary concentration tailing are obtained, and the secondary concentration tailing is returned and added to the primary concentration operation; the secondary concentration concentrate is subjected to a third blank concentration operation, and a third concentration concentrate and a third concentration tailing are obtained, and the third concentration tailing is returned and added to the secondary concentration operation; in terms of per ton of copper oxide ore, the collector 200 g and the frother 50 g are added to the primary roughing concentrate in step (4), and the collector 100 g is added to the primary concentration concentrate.

[0065] Table 3: Test results of Example 3

[0066]

[0067] ​The test results of the embodiment are shown in Table 3. The data in Table 3 show that the grade and recovery of the copper oxide concentrate are respectively increased by 2.42% and 9.88% under the NH3·H2O-copper test reagent system, and therefore the NH3·H2O-copper test reagent system has better activation effect on the copper oxide mineral and higher recovery efficiency.

Claims

1. A method for enhanced activation flotation of carbonate-type oxidized copper ore, characterized in that... Follow these steps: (1) The copper oxide ore is crushed, ground and then slurry is prepared to obtain the slurry to be floated; (2) Add modifier, activator, collector and frother to the slurry in step (1) in sequence to carry out a roughing operation to obtain a roughing concentrate and a roughing tailings; (3) Add modifier, activator, collector and frother to the tailings of the first roughing in step (2) in sequence to perform a first scavenging operation to obtain a first scavenging concentrate and a first scavenging tailings; return the first scavenging concentrate to the first roughing operation, add modifier, activator, collector and frother to the tailings of the first scavenging in sequence to perform a second scavenging operation to obtain a second scavenging concentrate and a second scavenging tailings; return the second scavenging concentrate to the first scavenging operation, and the second scavenging tailings are the final tailings; (4) Add collector and frother to the rough concentrate from step (2) for a first cleaning operation to obtain a first clean concentrate and a first clean tailings. The first clean tailings are returned and incorporated into the first rough operation. Add collector to the first clean concentrate for a second cleaning operation to obtain a second clean concentrate and a second clean tailings. The second clean tailings are returned and incorporated into the first cleaning operation. Perform a third blank cleaning operation on the second clean concentrate to obtain a third clean concentrate and a third clean tailings. The third clean tailings are returned and incorporated into the second cleaning operation. The third clean concentrate is copper oxide concentrate. The modifier is NH3·H2O, the activator is bismuth reagent, the collector is butyl xanthate, and the frother is pine oil. That is, the modifier NH3·H2O is added before activation to treat carbonate-type copper oxide minerals, which can change the surface properties of minerals and the composition of slurry solution. Then the activator bismuth reagent is added. The pretreatment with NH3·H2O enhances the activation effect of bismuth reagent on carbonate-type copper oxide minerals. Finally, the collector and frother are added in sequence to recover copper minerals from the ore. The mass ratio of the modifier NH3·H2O to the activator bismuth reagent added to the slurry is (1~2):

1.

2. The enhanced activation flotation method for carbonate-type oxidized copper ore according to claim 1, characterized in that: Step (1) The copper mass percentage content in the copper oxide ore is 0.5~4.5%.

3. The enhanced activation flotation method for carbonate-type oxidized copper ore according to claim 1, characterized in that: For each ton of copper oxide ore, the amount of conditioning agent added in the roughing operation of step (2) is 100~500g, activator 100~500g, collector 50~400g, and frother 20~80g.

4. The enhanced activation flotation method for carbonate-type oxidized copper ore according to claim 1, characterized in that: For each ton of copper oxide ore, the dosage of reagents added to the primary roughing tailings in step (3) is 100-300 g of adjuster, 100-300 g of activator, 50-300 g of collector, and 20-50 g of frother. The dosage of reagents added to the primary scavenging tailings is 100-200 g of adjuster, 100-200 g of activator, 50-200 g of collector, and 20-40 g of frother.

5. The enhanced activation flotation method for carbonate-type copper oxide ores according to claim 1, characterized in that: For each ton of copper oxide ore, the amount of reagent added to the primary roughing concentrate in step (4) is 50-200 g of collector and 10-50 g of frother, and the amount of reagent added to the primary cleaning concentrate is 50-100 g of collector.

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