CN114392834B - Beneficiation method for associated low-grade copper, lead, zinc and silver in gold ore and application - Google Patents
Beneficiation method for associated low-grade copper, lead, zinc and silver in gold ore and application Download PDFInfo
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- CN114392834B CN114392834B CN202210297881.2A CN202210297881A CN114392834B CN 114392834 B CN114392834 B CN 114392834B CN 202210297881 A CN202210297881 A CN 202210297881A CN 114392834 B CN114392834 B CN 114392834B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/025—Precious metal ores
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Abstract
The invention relates to the technical field of flotation separation, in particular to a beneficiation method and application of associated low-grade copper, lead, zinc and silver in gold ore. The beneficiation method for the associated low-grade copper, lead, zinc and silver in the gold ore adopts the floatable re-separation of gold, silver, copper, lead, zinc and sulfur mixed flotation, zinc and sulfur mixed concentrate cyaniding leaching and slag leaching zinc and sulfur separation process, so that the comprehensive recovery of the associated low-grade copper, lead, zinc and silver in the gold ore is realized, and the purpose of efficiently and fully recycling the associated low-grade valuable elements can be achieved.
Description
Technical Field
The invention relates to the technical field of flotation separation, in particular to a beneficiation method and application of associated low-grade copper, lead, zinc and silver in gold ore.
Background
Most of the gold mineral resources are associated minerals, and most of the gold deposit minerals are accompanied by various valuable metals such as silver, copper, lead, zinc, sulfur and the like. However, due to the characteristics of low grade, close association relationship and complex embedding relationship of associated valuable metals, the comprehensive recovery of the associated valuable metals is difficult and high in cost, so that recovery of heavy metals is usually only noted in many gold ores, the recovery rate of associated elements is generally low, resource waste is caused, and economic benefits of enterprises are damaged.
Mineral resources are fully utilized, the resource utilization rate is improved, and the method is technically feasible, economically reasonable and maximized in resource utilization under the existing conditions. Under the condition of unfavorable economic situation of mining industry, the existing resources are required to be comprehensively developed and utilized, the production cost is reduced, and the yield and income of enterprises are increased.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
One aspect of the invention relates to a beneficiation method for associated low-grade copper, lead, zinc and silver in gold ore, which comprises the following steps:
(a) adding a first collecting agent and a foaming agent into the gold ore pulp, and then performing at least one time of equal-floatability rough separation to obtain equal-floatability rough concentrate and equal-floatability rough separation tailings;
(b) performing at least one time of equal-floatability concentration on the equal-floatability rough concentrate obtained in the step (a) to obtain equal-floatability concentrate; adding a pH regulator into the floatable concentrate, and then carrying out first ore grinding treatment; adding an inhibitor into the ore pulp obtained after the first ore grinding treatment, and then performing at least one separation roughing to obtain gold rough concentrate and gold rough tailings; after the inhibitor is added into the gold rough concentrate, carrying out at least one separation and concentration to obtain gold concentrate; adding a second collecting agent into the gold roughing tailings, and then performing at least one separation scavenging to obtain a first zinc-sulfur concentrate;
(c) adding a first collecting agent into the floatable rougher tailings obtained in the step (a) and then performing at least one time of floatation so as to obtain floatable scavenged tailings; adding an activating agent, a third collecting agent and the foaming agent into the floatable scavenging tailings in sequence, and performing zinc-sulfur roughing at least once to obtain zinc-sulfur rough concentrate and zinc-sulfur roughing tailings; performing at least one zinc-sulfur concentration on the zinc-sulfur rough concentrate to obtain a second zinc-sulfur concentrate; adding the activating agent and the third collecting agent into the zinc-sulfur roughing tailings and then carrying out at least one time of zinc-sulfur scavenging to obtain tailings;
(d) mixing the first zinc-sulfur concentrate obtained in the step (b) and the second zinc-sulfur concentrate obtained in the step (c) to obtain zinc-sulfur bulk concentrate; carrying out second ore grinding treatment and leaching on the zinc-sulfur bulk concentrate in sequence to obtain pregnant solution and zinc-sulfur leaching residue; adding the pH regulator, the activator, the third collector and the foaming agent into the zinc-sulfur leaching residue, and then performing zinc-sulfur separation and roughing for at least one time to obtain zinc rough concentrate and sulfur rough concentrate;
(e) adding the pH regulator to the zinc rough concentrate obtained in the step (d) and then carrying out at least one zinc concentration to obtain zinc concentrate; adding the activating agent and the third collecting agent into the sulfur rough concentrate obtained in the step (d) and then carrying out sulfur scavenging for at least one time to obtain sulfur concentrate.
The beneficiation method for the associated low-grade copper, lead, zinc and silver in the gold ore effectively realizes the comprehensive recovery of the associated low-grade copper, lead, zinc and silver in the gold ore and achieves the purpose of efficiently and fully comprehensively recycling the associated low-grade valuable elements.
In another aspect of the invention, the invention also relates to a utilization method of the gold ore associated with the low-grade copper, lead, zinc and silver, comprising a beneficiation method of the associated low-grade copper, lead, zinc and silver in the gold ore.
The utilization method of the gold ore associated with the low-grade copper, lead, zinc and silver can comprehensively recycle the gold ore and the associated low-grade valuable metal elements, and effectively avoids the waste of the low-grade valuable metal elements.
Compared with the prior art, the invention has the beneficial effects that:
(1) the beneficiation method for the associated low-grade copper, lead, zinc and silver in the gold ore effectively realizes the comprehensive recovery of the associated low-grade copper, lead, zinc and silver in the gold ore and achieves the purpose of efficiently and fully comprehensively recycling the associated low-grade valuable elements.
(2) The utilization method of the gold ore associated with low-grade copper, lead, zinc and silver provided by the invention can realize comprehensive utilization of the gold ore and the associated low-grade valuable metal elements thereof, and effectively avoids resource waste.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following detailed description, but those skilled in the art will understand that the following described examples are some, not all, of the examples of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
One aspect of the invention relates to a beneficiation method for associated low-grade copper, lead, zinc and silver in gold ore, which comprises the following steps:
(a) adding a first collecting agent and a foaming agent into the gold ore pulp, and then performing at least one time of equal-floatability rough separation to obtain equal-floatability rough concentrate and equal-floatability rough separation tailings;
(b) performing at least one-time equal-floatable concentration on the equal-floatable rough concentrate obtained in the step (a) to obtain equal-floatable concentrate; adding a pH regulator into the floatable concentrate, and then carrying out first ore grinding treatment; adding an inhibitor into the ore pulp obtained after the first ore grinding treatment, and then performing at least one separation roughing to obtain gold rough concentrate and gold rough tailings; after the inhibitor is added into the gold rough concentrate, carrying out at least one separation and concentration to obtain gold concentrate; adding a second collecting agent into the gold roughing tailings, and then performing at least one separation scavenging to obtain a first zinc-sulfur concentrate;
(c) adding a first collecting agent into the floatable rougher tailings obtained in the step (a) and then performing at least one time of floatation so as to obtain floatable scavenged tailings; adding an activating agent, a third collecting agent and the foaming agent into the floatable scavenging tailings in sequence, and performing zinc-sulfur roughing at least once to obtain zinc-sulfur rough concentrate and zinc-sulfur roughing tailings; performing at least one zinc-sulfur concentration on the zinc-sulfur rough concentrate to obtain a second zinc-sulfur concentrate; adding the activating agent and the third collecting agent into the zinc-sulfur roughing tailings and then carrying out at least one time of zinc-sulfur scavenging to obtain tailings;
(d) mixing the first zinc-sulfur concentrate obtained in the step (b) and the second zinc-sulfur concentrate obtained in the step (c) to obtain zinc-sulfur bulk concentrate; carrying out second ore grinding treatment and leaching on the zinc-sulfur bulk concentrate in sequence to obtain pregnant solution and zinc-sulfur leaching residue; adding the pH regulator, the activating agent, the third collecting agent and the foaming agent into the zinc-sulfur leaching residue, and then performing at least one time of zinc-sulfur separation and roughing to obtain zinc rough concentrate and sulfur rough concentrate;
(e) adding the pH regulator to the zinc rough concentrate obtained in the step (d) and then carrying out at least one zinc concentration to obtain zinc concentrate; adding the activating agent and the third collecting agent into the sulfur rough concentrate obtained in the step (d) and then performing sulfur scavenging for at least one time to obtain sulfur concentrate.
The beneficiation method for the associated low-grade copper, lead, zinc and silver in the gold ore can recover the associated low-grade copper, lead, zinc and silver from the gold ore, and achieves the purpose of efficiently, fully and comprehensively recycling the associated low-grade valuable elements.
The beneficiation method adopts the floatable re-separation of gold, silver, copper, lead, zinc and sulfur bulk flotation, zinc and sulfur bulk concentrate cyaniding leaching, slag leaching and zinc and sulfur separation process, and performs the floatable flotation of gold, silver, copper, lead, zinc and sulfur and the like by utilizing the floatability difference between different kinds of minerals and between the same kind of minerals. Carrying out preferential flotation on gold, silver, copper, lead and a part of zinc and sulfur with good floatability, and then separating the gold, the silver, the copper, the lead and the gold-containing zinc and sulfur to obtain gold concentrate containing copper, lead and silver and first gold-containing zinc and sulfur concentrate; the grade of gold in the obtained gold concentrate is high, and the associated low-grade copper, lead and silver in the gold concentrate also reaches a higher pricing standard, so that comprehensive recovery is realized; zinc-sulfur mixed flotation is carried out on the equal-floatability flotation tailings containing most of sulfur to obtain second gold-containing zinc-sulfur concentrate, the two gold-containing zinc-sulfur concentrates are mixed and then reground, and the reground is leached to recover gold therein, so that the recovery rate of the gold is ensured, and then the leached slag, namely the zinc-sulfur concentrate is separated to obtain a zinc concentrate product, so that the comprehensive recovery of zinc is realized.
Preferably, the gold ore raw ore is subjected to a third ore grinding treatment to obtain the gold ore pulp.
Preferably, in the gold ore raw ore, the grade of gold is more than or equal to 1.5g/t, the grade of silver is less than or equal to 10.00g/t, the grade of copper is less than or equal to 0.1%, the grade of lead is less than or equal to 0.1%, the grade of zinc is 0.30-0.80%, and the grade of sulfur is more than 4%.
The beneficiation method provided by the invention aims at the problems that the grade of copper and lead is low, products cannot be formed, the grade range of zinc is in a low grade range, products can be formed, and the copper, lead and zinc are not priced gold ore due to the mixed flotation with high sulfur content.
Preferably, the concentration of the gold ore pulp is 28wt% to 42wt% (e.g., 28wt%, 32wt%, 36wt%, 40wt%, or 42 wt%).
The concentration of the gold ore pulp is within a certain range, so that the metal to be recovered with a certain content in the ore pulp can be ensured, and the recovery efficiency is ensured.
Preferably, the gold ore pulp contains 55wt% to 75wt% (e.g., 55wt%, 60wt%, 65wt%, 70wt% or 75 wt%) of particles with fineness ≤ 74 μm.
Preferably, in the step (b), the ore slurry obtained after the first ore grinding treatment contains 75wt% to 95wt% (for example, 75wt%, 80wt%, 85wt%, 90wt% or 95 wt%) of particles with fineness less than or equal to 38 μm.
Preferably, in the step (d), the particles with fineness less than or equal to 20 μm in the zinc-sulfur bulk concentrate after the second ore grinding treatment account for 70wt% -95 wt% (e.g. 70wt%, 75wt%, 80wt%, 85wt%, 90wt% or 95 wt%).
The fineness of ore pulp in the ore dressing process is controlled within a proper range, the final recovery efficiency can be ensured, and the cost rise caused by excessive ore grinding can be avoided.
Preferably, the first collector is selected from at least one of ethyl xanthate, isopropyl xanthate, butyl xanthate, isoamyl xanthate, ethioamine, aniline nigride, butylammonium nigride or ethionamide.
Preferably, in the step (a), the first collector is added to the gold ore pulp in an amount of 20-200 g (for example, 20g, 40g, 60g, 80g, 100g, 120g, 140g, 160g, 180g or 200 g) per ton of the gold ore raw ore.
Preferably, in the step (c), the first collector is added to the floatable tailings in an amount of 5-200 g (for example, 5g, 20g, 40g, 60g, 80g, 100g, 120g, 140g, 160g, 180g or 200 g) per ton of the gold ore raw ore.
Preferably, the second collector is selected from at least one of ethyl xanthate, ethyl thiourethane, aniline nigride, butylammonium nigride or ethyl sulphur nitrogen.
Preferably, in the step (b), the second collector is added in an amount of 0.1-20 g (e.g. 0.1g, 1g, 6g, 9g, 13g, 17g or 20 g) per ton of the gold ore raw ore.
Preferably, the third collector is selected from at least one of ethyl xanthate, isopropyl xanthate, butyl xanthate or isoamyl xanthate.
Preferably, in the step (c), the third collector is added to the floatable tailings in an amount of 20-200 g (for example, 20g, 40g, 60g, 80g, 100g, 120g, 140g, 160g, 180g or 200 g) per ton of the gold ore raw ore.
Preferably, in the step (c), the third collecting agent is added to the zinc-sulfur rougher tailings in an amount of 5-200 g (for example, 5g, 15g, 40g, 60g, 80g, 100g, 120g, 140g, 160g, 180g, or 200 g) per ton of the gold ore raw ore.
Preferably, in the step (d), the third collecting agent is added to the zinc-sulfur leaching residue in an amount of 10-200 g (for example, 10g, 20g, 40g, 60g, 80g, 100g, 120g, 140g, 160g, 180g or 200 g) per ton of the gold ore crude ore.
Preferably, in the step (d), the third collector is added to the sulfur rough concentrate in an amount of 10-200 g (for example, 10g, 20g, 40g, 60g, 80g, 100g, 120g, 140g, 160g, 180g or 200 g) per ton of the gold ore crude ore.
The collector can be selectively adsorbed on the surface of the mineral, and can improve the hydrophobic degree of the surface of the mineral, so that the surface of the mineral is easy to adhere to bubbles, and the floatability of the mineral is improved. If the amount of the collecting agent is too small in the mineral separation process, the mineral flotation effect is directly influenced, the excessive adding amount can cause the waste of the collecting agent, and the matching effect between the collecting agent and other mineral separation agents can be influenced.
Preferably, the foaming agent is selected from at least one of methyl isobutyl carbinol, pine oil, pine alcohol oil, alcohols or butyl ether alcohols.
Preferably, in the step (a), the foaming agent is added to the gold ore pulp in an amount of 4-40 g (e.g. 4g, 8g, 12g, 18g, 26g, 30g, 36g or 40 g) per ton of the gold ore raw ore.
Preferably, in the step (c), the foaming agent is added to the equal-flotable tailings in an amount of 0.1-30 g (for example, 0.1g, 1g, 5g, 10g, 15g, 20g, 25g or 30 g) per ton of the gold ore raw ore.
Preferably, in the step (d), the foaming agent is added to the zinc-sulfur leaching residue in an amount of 0.1-20 g (for example, 0.1g, 1g, 5g, 10g, 15g or 20 g) per ton of the gold ore crude ore.
The foaming agent can reduce the surface tension of water to form foam, so that air bubbles in flotation pulp can be attached to selectively floating mineral particles, the foaming agent and the collecting agent are adsorbed on the surfaces of the mineral particles together and play a synergistic role, the consumption of the foaming agent needs to be controlled within a proper range, and the foaming agent and the collecting agent can be guaranteed to play a good flotation effect.
Preferably, the pH adjusting agent is selected from at least one of lime, sodium hydroxide, sodium humate, or calcium chloride.
Preferably, in the step (b), the amount of the pH regulator added to the floatable concentrate is 50-800 g (for example, 50g, 100g, 150g, 200g, 300g, 350g, 400g, 450g, 550g, 650g, 750g or 800 g) per ton of the gold ore crude ore.
Preferably, in the step (d), the amount of the pH regulator added to the zinc-sulfur leaching residue is 20-800 g (for example, 20g, 100g, 200g, 300g, 400g, 500g, 600g, 700g or 800 g) per ton of the gold ore crude ore.
Preferably, in the step (e), the amount of the pH regulator added to the zinc rough concentrate is 20-800 g (for example, 20g, 100g, 200g, 300g, 400g, 500g, 600g, 700g or 800 g) per ton of the gold ore crude ore.
The pH regulator can regulate the action of the collecting agent and the minerals, promote or inhibit the floatability of the minerals and regulate the pH value and the ion composition of ore pulp, so that the addition amount of the pH regulator needs to be controlled within a proper range in the ore dressing process.
Preferably, the inhibitor is selected from zinc sulphate and/or sodium sulphite.
Preferably, in the step (b), the amount of the inhibitor added to the ore slurry obtained after the first ore grinding treatment is 20-800 g (for example, 20g, 100g, 200g, 300g, 400g, 500g, 600g, 700g or 800 g) per ton of the gold ore raw ore.
Preferably, in the step (b), the inhibitor is added to the gold rough concentrate in an amount of 20-800 g (e.g. 20g, 100g, 200g, 300g, 400g, 500g, 600g, 700g or 800 g) per ton of the gold ore crude ore.
The inhibitor can destroy or weaken the adsorption of minerals to the collector, and if the addition amount of the inhibitor is not enough, the interference effect of the inhibitor on the collector can be influenced, and if the addition amount of the inhibitor is too much, the inhibitor can be wasted.
Preferably, the activator is selected from at least one of copper sulfate, copper nitrate or lead nitrate.
Preferably, in the step (c), the amount of the activating agent added to the equal-flotable tailings is 20-200 g (for example, 20g, 40g, 80g, 120g, 140g, 160g or 200 g) per ton of the gold ore raw ore.
Preferably, in the step (c), the amount of the activator added to the zinc-sulfur rougher tailings is 20-200 g (for example, 20g, 40g, 80g, 120g, 140g, 160g or 200 g) per ton of the gold ore raw ore.
Preferably, in the step (d), the activator is added to the zinc-sulfur leaching residue in an amount of 10-200 g (for example, 10g, 20g, 40g, 80g, 120g, 140g, 160g or 200 g) per ton of the gold ore crude ore.
Preferably, in the step (e), the activator is added to the sulfur rough concentrate in an amount of 10-200 g (e.g., 10g, 20g, 40g, 80g, 120g, 140g, 160g, or 200 g) per ton of the gold ore raw ore.
The activator can destroy the interference effect of the inhibitor on the collector, the collector can easily adsorb mineral particles, the activator is often required to be added when the collector needs to be reused for adsorption in the mineral separation process, and the specific dosage of the activator directly influences the degree of the recovery absorption capacity of the collector, so that the collector needs to be controlled in a proper range.
Preferably, the leaching agent of the leach comprises sodium cyanide and/or potassium cyanide.
Preferably, in the step (d), 50-5000 g (for example, 50g, 800g, 1500g, 2000g, 2500g, 3000g, 3500g, 4000g, 4500g or 5000 g) of the leaching agent is added per ton of the gold ore raw ore.
In another aspect of the invention, the invention also relates to a utilization method of the gold ore associated with the low-grade copper, lead, zinc and silver, comprising a beneficiation method of the associated low-grade copper, lead, zinc and silver in the gold ore.
The utilization method of the gold ore associated with the low-grade copper, lead, zinc and silver can realize the comprehensive utilization of the gold ore and the associated low-grade valuable metal elements, and can effectively avoid the waste of resources.
The present invention will be further explained and illustrated with reference to specific examples and comparative examples.
Example 1
In the gold ore raw ore, the gold content is 1.73g/t, the silver content is 4.5 g/t, the copper content is 0.03wt%, the lead content is 0.07wt%, the zinc content is 0.35wt% and the sulfur content is 5.6 wt%.
The beneficiation method provided by the embodiment comprises the following steps:
A. grinding the gold ore raw ore, wherein particles with fineness less than or equal to 74 mu m account for 70% after grinding to obtain gold ore pulp, the concentration of the ore pulp is 33wt%, sequentially adding a collecting agent and a foaming agent terpineol oil into the gold ore pulp, and performing equal-floatable rough separation for 2 times to obtain equal-floatable rough concentrate and equal-floatable rough tailings; the dosage of the floatable crude selection medicament of the 1 st time is as follows: adding 40g of collecting agent and 8g of pine oil to each ton of raw ore correspondingly; the dosage of the 2 nd-grade floatable coarse selection medicament is as follows: adding 20g of collecting agent and 4g of pine oil to each ton of raw ore correspondingly;
adding a collecting agent into the equal-floatable rougher tailings for 2 times of equal-floatable scavenging to obtain equal-floatable scavenged tailings; 10g of collecting agent is correspondingly added to each ton of raw ore in the 1 st equal flotation; 5g of collecting agent is correspondingly added to each ton of raw ore in the 2 nd equal flotation;
the collecting agent is prepared from ethyl xanthate, ammonium butanamide and ethyl sulfur nitrogen according to the weight ratio of 2:1: 1;
B. carrying out 2 times of equal-floatable concentration on the equal-floatable rough concentrate to obtain equal-floatable concentrate; regrinding the floatable rough concentrate, adding 300g of lime serving as a pH regulator into each ton of raw ore in the process of grinding ore, adjusting the pH value of ore pulp to be 12, and using particles with the regrinding degree of less than or equal to 38 mu m to account for 90 wt%; adding 500g of inhibitor zinc sulfate into each ton of raw ore in the reground equal-floatable concentrate ore pulp, and performing primary separation and roughing to obtain gold rough concentrate and gold rough tailings;
adding inhibitor zinc sulfate into the gold rough concentrate for at least two times of separation and concentration, thereby obtaining gold concentrate: wherein 100g of zinc sulfate is correspondingly added to each ton of raw ore in the 1 st separation and fine selection; 50g of zinc sulfate is correspondingly added to each ton of raw ore in the 2 nd separation and concentration;
adding a collecting agent into the gold roughing tailings for twice separation scavenging to obtain a first zinc-sulfur concentrate: the collecting agent is prepared from ammonium butyrate black powder and ethionine according to the weight ratio of 1:1, and 4g of the collecting agent is correspondingly added to each ton of raw ore in the 1 st separation and sweeping; adding 2g of collecting agent to each ton of raw ore in the 2 nd separation scavenging;
C. adding 80g of activating agent copper sulfate, 60g of collecting agent butyl xanthate and 16g of foaming agent in turn to each ton of raw ore in the equal-flotation scavenged tailings, and performing primary zinc-sulfur roughing to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings; performing secondary mixed concentration on the zinc-sulfur mixed rough concentrate to obtain a second zinc-sulfur concentrate;
sequentially adding an activating agent copper sulfate and a collecting agent butyl xanthate into the zinc-sulfur roughing tailings, and performing zinc-sulfur mixed scavenging twice to obtain tailings; wherein: adding 40g of copper sulfate into each ton of raw ore of the zinc-sulfur scavenging activator for the 1 st time, and adding 30g of butyl xanthate serving as a collecting agent into each ton of raw ore; 20g of copper sulfate as an activator for zinc-sulfur scavenging for the 2 nd time is correspondingly added to each ton of raw ores, and 15g of butyl xanthate as a collector is correspondingly added to each ton of raw ores;
D. mixing the first zinc-sulfur concentrate and the second zinc-sulfur concentrate to obtain zinc-sulfur bulk concentrate, adding 1000g of a leaching agent sodium cyanide to each ton of raw ore in the reground zinc-sulfur bulk concentrate, and leaching to obtain pregnant solution and zinc-sulfur leaching residue; wherein, the grain with the regrinding degree less than or equal to 20 μm of the zinc-sulfur bulk concentrate accounts for 88wt percent;
E. adding 200g of pH regulator lime, 50g of activator copper sulfate, 40g of collecting agent butyl xanthate and 4g of foaming agent terpineol oil into the zinc-sulfur leaching residue per ton of raw ore, adjusting the pH value of the ore pulp to be 12, and carrying out primary zinc-sulfur separation and roughing to obtain zinc rough concentrate and sulfur rough concentrate;
adding lime serving as a pH regulator into the zinc rough concentrate, and performing zinc concentration twice to obtain zinc concentrate; wherein, 100g of lime is correspondingly added into each ton of raw ore in the 1 st zinc concentration, and the pH value of the ore pulp is adjusted to be 12; adding 50g of lime into each ton of raw ore in the 2 nd zinc concentration, and adjusting the pH value of the ore pulp to 12;
adding an activating agent copper sulfate and a collecting agent butyl xanthate into the sulfur rough concentrate, and performing sulfur scavenging twice to obtain sulfur concentrate; wherein: adding 25g of activating agent copper sulfate for the 1 st sulfur scavenging for each ton of raw ore, and adding 15g of collecting agent butyl xanthate for each ton of raw ore; 15g of activating agent copper sulfate is correspondingly added into each ton of raw ore in the 2 nd sulfur scavenging, and 10g of collecting agent butyl xanthate is correspondingly added into each ton of raw ore;
the stirring speed of the flotation operation in the steps A-E is 1750r/min, and the flotation time is 4 min.
After the gold ore raw ore is treated by the beneficiation method provided by the embodiment 1, the gold grade of 326.86 g/t, the silver grade of 832.00 g/t, the copper grade of 8.26% and the lead grade of 25.83% are finally obtained; the gold concentrate has the gold recovery rate of 70.85%, the silver recovery rate of 68.44%, the copper recovery rate of 83.63% and the lead recovery rate of 88.16%; obtaining zinc concentrate with 47.83 percent of zinc grade and 87.80 percent of zinc recovery rate; the total recovery rate of gold dressing and metallurgy is 94.07%, and the total recovery rate of silver dressing and metallurgy is 90.39%.
Example 2
The gold ore raw ore was the same as in example 1.
The beneficiation method provided by the embodiment comprises the following steps:
A. grinding the gold ore raw ore, wherein particles with fineness less than or equal to 74 mu m account for 55% after grinding to obtain gold ore pulp, the concentration of the ore pulp is 42wt%, sequentially adding a collecting agent and a foaming agent terpineol oil into the gold ore pulp, and performing equal-floatable rough separation for 2 times to obtain equal-floatable rough concentrate and equal-floatable rough tailings; the dosage of the 1 st grade floatable coarse selection medicament is as follows: adding 200g of collecting agent and 40g of pine oil to each ton of raw ore correspondingly; the dosage of the 2 nd-grade floatable coarse selection medicament is as follows: adding 20g of collecting agent and 4g of pine oil to each ton of raw ore correspondingly;
adding a collecting agent into the equal-floatable rougher tailings for 2 times of equal-floatable scavenging to obtain equal-floatable scavenged tailings; 10g of collecting agent is correspondingly added to each ton of raw ore in the 1 st equal flotation; 5g of collecting agent is correspondingly added to each ton of raw ore in the 2 nd equal flotation;
the collecting agent is prepared from ethyl xanthate, ammonium butanamide and ethyl sulfur nitrogen according to the weight ratio of 2:1: 1;
B. carrying out 2 times of equal-floatable concentration on the equal-floatable rough concentrate to obtain equal-floatable concentrate; regrinding the floatable rough concentrate, correspondingly adding 50g of pH regulator lime into each ton of raw ore in the process of grinding, adjusting the pH value of ore pulp to 12, and controlling the proportion of particles with the regrinding degree of less than or equal to 38 mu m to 75 wt%; adding 800g of inhibitor zinc sulfate to each ton of raw ore in the reground equal-floatable concentrate pulp, and performing primary separation and roughing to obtain gold rough concentrate and gold rough tailings;
adding inhibitor zinc sulfate to the gold rough concentrate for at least two times of separation and concentration, thereby obtaining gold concentrate: wherein, 200g of zinc sulfate is correspondingly added to each ton of raw ore in the 1 st separation and fine selection; 100g of zinc sulfate is correspondingly added to each ton of raw ore in the 2 nd separation and concentration;
adding a collecting agent into the gold rougher tailings for twice separation and scavenging to obtain a first zinc-sulfur concentrate: the collecting agent is prepared from ammonium butyrate black powder and ethionine according to the weight ratio of 1:1, and 20g of the collecting agent is correspondingly added to each ton of raw ore in the 1 st separation and sweeping; adding 2g of collecting agent to each ton of raw ore in the 2 nd separation scavenging;
C. adding 200g of activating agent copper sulfate, 100g of collecting agent butyl xanthate and 30g of foaming agent into each ton of raw ore in the equal-flotation scavenged tailings in sequence, and performing zinc-sulfur roughing to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings; performing secondary mixed concentration on the zinc-sulfur mixed rough concentrate to obtain a second zinc-sulfur concentrate;
sequentially adding an activating agent copper sulfate and a collecting agent butyl xanthate into the zinc-sulfur roughing tailings, and performing zinc-sulfur mixed scavenging twice to obtain tailings; wherein: 20g of activating agent copper sulfate is correspondingly added to each ton of raw ore in the 1 st zinc-sulfur scavenging, and 30g of collecting agent butyl xanthate is correspondingly added to each ton of raw ore; 10g of copper sulfate as an activator for zinc-sulfur scavenging for the 2 nd time is correspondingly added to each ton of raw ores, and 15g of butyl xanthate as a collector is correspondingly added to each ton of raw ores;
D. mixing the first zinc-sulfur concentrate and the second zinc-sulfur concentrate to obtain zinc-sulfur bulk concentrate, adding 5000g of a leaching agent sodium cyanide to each ton of raw ore in the reground zinc-sulfur bulk concentrate, and leaching to obtain a pregnant solution and zinc-sulfur leaching residue; wherein, the proportion of particles with the regrinding degree less than or equal to 20 mu m in the zinc-sulfur bulk concentrate is 95 wt%;
E. adding 200g of pH regulator lime, 80g of activator copper sulfate, 50g of collecting agent butyl xanthate and 20g of foaming agent terpineol oil into the zinc-sulfur leaching residue per ton of raw ore, adjusting the pH value of the ore pulp to be 12, and carrying out primary zinc-sulfur separation and roughing to obtain zinc rough concentrate and sulfur rough concentrate;
adding lime serving as a pH regulator into the zinc rough concentrate, and performing zinc concentration twice to obtain zinc concentrate; wherein, 100g of lime is correspondingly added into each ton of raw ore in the 1 st zinc concentration, and the pH value of the ore pulp is adjusted to be 12; adding 50g of lime into each ton of raw ore in the 2 nd zinc concentration, and adjusting the pH value of the ore pulp to 12;
adding an activating agent copper sulfate and a collecting agent butyl xanthate into the sulfur rough concentrate, and performing sulfur scavenging twice to obtain sulfur concentrate; wherein: 50g of the activator copper sulfate for the 1 st sulfur scavenging is correspondingly added to each ton of raw ore, and 40g of the collector butyl xanthate is correspondingly added to each ton of raw ore; 10g of activating agent copper sulfate is correspondingly added to each ton of raw ore in the 2 nd sulfur scavenging, and 10g of collecting agent butyl xanthate is correspondingly added to each ton of raw ore;
the stirring speed of the flotation operation in the steps A-E is 1750r/min, and the flotation time is 4 min.
After the gold ore raw ore is treated by the beneficiation method provided by the embodiment 2, the gold grade of 292.53 g/t, the silver grade of 784.85 g/t, the copper grade of 8.06% and the lead grade of 24.15% are finally obtained; gold concentrate with gold recovery rate of 75.32%, silver recovery rate of 73.23%, copper recovery rate of 84.97% and lead recovery rate of 91.95%; obtaining zinc concentrate with 46.16 percent of zinc grade and 89.91 percent of zinc recovery rate; the total recovery rate of gold dressing and metallurgy is 95.89%, and the total recovery rate of silver dressing and metallurgy is 91.05%.
Example 3
The gold ore raw ore was the same as in example 1.
The beneficiation method provided by the embodiment comprises the following steps:
A. grinding the gold ore raw ore, wherein particles with fineness less than or equal to 74 mu m account for 75% after grinding to obtain gold ore pulp, the concentration of the ore pulp is 28wt%, sequentially adding a collecting agent and a foaming agent terpineol oil into the gold ore pulp, and performing equal-floatability rough separation for 2 times to obtain equal-floatability rough concentrate and equal-floatability rough separation tailings; the dosage of the 1 st grade floatable coarse selection medicament is as follows: adding 40g of collecting agent and 8g of pine oil to each ton of raw ore correspondingly; the dosage of the floatable crude selection medicament of the 2 nd time is as follows: adding 20g of collecting agent and 4g of pine oil to each ton of raw ore correspondingly;
adding a collecting agent into the equal-floatable rougher tailings for 2 times of equal-floatable scavenging to obtain equal-floatable scavenged tailings; 10g of collecting agent is correspondingly added to each ton of raw ore in the 1 st equal flotation; 5g of collecting agent is correspondingly added to each ton of raw ore in the 2 nd equal flotation;
the collecting agent is prepared from ethyl xanthate, ammonium butyrate nigricans and ethyl sulfur nitrogen according to the weight ratio of 2:1: 1;
B. carrying out 2 times of equal-floatable concentration on the equal-floatable rough concentrate to obtain equal-floatable concentrate; regrinding the floatable rough concentrate, correspondingly adding 800g of pH regulator lime into each ton of raw ore in the process of grinding ore, adjusting the pH value of ore pulp to 12, and enabling the regrinding degree to be less than or equal to 38 mu m to account for 95wt% of particles; adding 200g of inhibitor zinc sulfate to each ton of raw ore in the reground equal-floatable concentrate pulp, and performing primary separation and roughing to obtain gold rough concentrate and gold rough tailings;
adding inhibitor zinc sulfate into the gold rough concentrate for at least two times of separation and concentration, thereby obtaining gold concentrate: wherein 100g of zinc sulfate is correspondingly added to each ton of raw ore in the 1 st separation and fine selection; 50g of zinc sulfate is correspondingly added to each ton of raw ore in the 2 nd separation and concentration;
adding a collecting agent into the gold roughing tailings for twice separation scavenging to obtain a first zinc-sulfur concentrate: the collecting agent is prepared from ammonium butyrate black powder and ethionine according to the weight ratio of 1:1, and 4g of the collecting agent is correspondingly added to each ton of raw ore in the 1 st separation and sweeping; adding 2g of collecting agent to each ton of raw ore in the 2 nd separation scavenging;
C. adding 40g of activating agent copper sulfate, 30g of collecting agent butyl xanthate and 16g of foaming agent in turn to each ton of raw ore in the equal-flotation scavenged tailings, and performing zinc-sulfur roughing to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings; performing secondary mixed concentration on the zinc-sulfur mixed rough concentrate to obtain a second zinc-sulfur concentrate;
sequentially adding an activating agent copper sulfate and a collecting agent butyl xanthate into the zinc-sulfur roughing tailings, and performing zinc-sulfur mixed scavenging twice to obtain tailings; wherein: 20g of copper sulfate is added to each ton of raw ore of the zinc-sulfur scavenging activator for the 1 st time, and 15g of butyl xanthate serving as a collecting agent is added to each ton of raw ore; 10g of activating agent copper sulfate is correspondingly added to each ton of raw ore in the 2 nd zinc-sulfur scavenging, and 10g of collecting agent butyl xanthate is correspondingly added to each ton of raw ore;
D. mixing the first zinc-sulfur concentrate and the second zinc-sulfur concentrate to obtain zinc-sulfur bulk concentrate, adding 50g of a leaching agent sodium cyanide to each ton of raw ore in the reground zinc-sulfur bulk concentrate, and leaching to obtain pregnant solution and zinc-sulfur leaching residue; wherein, the proportion of the particles with the regrinding degree less than or equal to 20 mu m in the zinc-sulfur bulk concentrate is 70 wt%;
E. adding 50g of pH regulator lime, 30g of activator copper sulfate, 10g of collecting agent butyl xanthate and 4g of foaming agent terpineol oil into the zinc-sulfur leaching residue per ton of raw ore, adjusting the pH value of the ore pulp to be 12, and carrying out primary zinc-sulfur separation and roughing to obtain zinc rough concentrate and sulfur rough concentrate;
adding lime serving as a pH regulator into the zinc rough concentrate, and performing zinc concentration twice to obtain zinc concentrate; wherein, in the 1 st zinc concentration, 40g of lime is correspondingly added into each ton of raw ore, and the pH value of the ore pulp is adjusted to be 12; adding 20g of lime into each ton of raw ore in the 2 nd zinc concentration, and adjusting the pH value of the ore pulp to 12;
adding an activating agent copper sulfate and a collecting agent butyl xanthate into the sulfur rough concentrate, and performing sulfur scavenging twice to obtain sulfur concentrate; wherein: adding 25g of copper sulfate as an activator for the 1 st sulfur scavenging per ton of raw ore, and adding 15g of butyl xanthate as a collector per ton of raw ore; adding 15g of activating agent copper sulfate into each ton of raw ore in the 2 nd sulfur scavenging, and adding 10g of collecting agent butyl xanthate into each ton of raw ore;
the stirring speed of the flotation operation in the steps A-E is 1750r/min, and the flotation time is 4 min.
After the gold ore raw ore is treated by the beneficiation method provided by the embodiment 3, the gold grade of 303.24 g/t, the silver grade of 798.70 g/t, the copper grade of 8.01% and the lead grade of 24.98% are finally obtained; gold concentrate with gold recovery rate of 72.69%, silver recovery rate of 69.94%, copper recovery rate of 85.01% and lead recovery rate of 88.98%; obtaining zinc concentrate with zinc grade 49.15% and zinc recovery rate 86.25%; the total recovery rate of gold dressing and smelting is 95.92%, and the total recovery rate of silver dressing and smelting is 91.05%.
Comparative example 1
The gold ore raw ore was the same as in example 1.
In situ process
A. Grinding the gold ore raw ore, wherein particles with fineness less than or equal to 74 mu m account for 70% after grinding to obtain gold ore pulp, the concentration of the ore pulp is 33wt%, sequentially adding an activating agent, a collecting agent and a foaming agent pinitol oil into the gold ore pulp, and performing mixed roughing for 2 times to obtain mixed rough concentrate and mixed rough tailings; the dosage of the 1 st mixed rough selection medicament is as follows: 100g of copper sulfate, 40g of isoamyl xanthate and 8g of pinitol oil are correspondingly added to each ton of raw ore; the dosage of the 2 nd mixed crude selection medicament is as follows: 30g of copper sulfate, 20g of isoamyl xanthate and 4g of pinitol oil are correspondingly added to each ton of raw ore;
B. regrinding the bulk flotation rough concentrate, wherein the grains with the regrinding degree of less than or equal to 38 mu m account for 65wt%, and performing 3 times of bulk concentration on the reground bulk flotation rough concentrate to obtain gold concentrate;
c, adding a collecting agent into the mixed rough tailings for scavenging for 2 times to obtain tailings; adding 15g of copper sulfate and 10g of isoamyl xanthate into each ton of raw ore in the 1 st mixed scavenging; and 5g of copper sulfate and 5g of isoamyl xanthate are mixed and scavenged for the 2 nd time.
After the gold ore raw ore is processed by the beneficiation method provided by the comparison 1, the gold grade of 37.46 g/t and the silver grade of 89.38 g/t are finally obtained; the gold recovery rate is 95.32 percent, and the silver recovery rate is 91.24 percent.
The beneficiation method provided by the comparative example 1 only considers the recovery of gold in the raw ore, and the associated metal has low grade in the gold concentrate and is not priced, so that the resource waste and the economic loss are caused.
Compared with the embodiment 1, the comparative example 1 has higher sulfur content in the gold rough concentrate and poorer separation effect of the comparative example 1, so that the yield of the gold concentrate is higher, the gold grade is lower, the valuation coefficient of gold is lower, the associated metal copper, lead and silver entering the gold concentrate has low element grade and is not priced, and the associated metal zinc is activated and then enters the gold concentrate and cannot be separately recovered.
It can be clearly seen from the comparison of the final products obtained by the beneficiation methods in the above example 1 and the comparative example 1 that the comparative example 1 adopts the traditional beneficiation method to obtain a low-grade gold concentrate product, but the associated metals of copper, lead, zinc and silver in the product cannot be recovered due to low grade, which causes resource waste and enterprise economic benefit loss.
The beneficiation method of the invention obtains two products of high-grade gold concentrate and zinc concentrate, wherein the gold grade in the gold concentrate is greatly improved, the valuation coefficient of gold is improved, and the high-coefficient valuation recovery is realized by accompanying elements of copper, lead and silver.
In conclusion, the method can effectively solve the problems that the low-grade associated copper, lead, zinc and silver in the gold ore cannot be separated and is difficult to recover, and metal resources are wasted, realize the valuation recovery of the associated copper, lead and silver in the gold ore, obtain high-quality gold concentrate and single zinc concentrate products, and realize the comprehensive recycling of the associated low-grade copper, lead, zinc and silver in the gold ore.
While particular embodiments of the present invention have been illustrated and described, it will be appreciated that the above embodiments are merely illustrative of the technical solution of the present invention and are not restrictive; those of ordinary skill in the art will understand that: modifications may be made to the above-described embodiments, or equivalents may be substituted for some or all of the features thereof without departing from the spirit and scope of the present invention; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; it is therefore intended to cover in the appended claims all such alternatives and modifications that are within the scope of the invention.
Claims (10)
1. A beneficiation method for associated low-grade copper, lead, zinc and silver in gold ore is characterized by comprising the following steps:
(a) adding a first collecting agent and a foaming agent into the gold ore pulp, and then carrying out at least one equal floatable roughing to obtain equal floatable rough concentrate and equal floatable roughing tailings;
in the step (a), the amount of the foaming agent added into the gold ore pulp is 4-40 g per ton of the gold ore raw ore;
(b) performing at least one time of equal-floatability concentration on the equal-floatability rough concentrate obtained in the step (a) to obtain equal-floatability concentrate; adding a pH regulator into the floatable concentrate, and then carrying out first ore grinding treatment; adding an inhibitor into the ore pulp obtained after the first ore grinding treatment, and then carrying out at least one-time separation and roughing to obtain gold rough concentrate and gold rough tailings; after the inhibitor is added into the gold rough concentrate, carrying out at least one separation and concentration to obtain gold concentrate; adding a second collecting agent into the gold roughing tailings, and then performing at least one separation scavenging to obtain a first zinc-sulfur concentrate;
in the step (b), the amount of the pH regulator added into the equal-floatable concentrate is 50-800 g per ton of the gold ore crude ore;
in the step (b), 75-95 wt% of particles with fineness less than or equal to 38 mu m in the ore pulp obtained after the first ore grinding treatment are contained;
in the step (b), the amount of the inhibitor added into the ore pulp obtained after the first ore grinding treatment is 20-800 g per ton of the gold ore raw ore;
in the step (b), the amount of the inhibitor added into the gold rough concentrate is 20-800 g per ton of the gold ore crude ore;
(c) adding a first collecting agent into the floatable rougher tailings obtained in the step (a) and then performing at least one time of floatation so as to obtain floatable scavenged tailings; adding an activating agent, a third collecting agent and the foaming agent into the floatable scavenging tailings in sequence, and performing zinc-sulfur roughing at least once to obtain zinc-sulfur rough concentrate and zinc-sulfur roughing tailings; performing at least one zinc-sulfur concentration on the zinc-sulfur rough concentrate to obtain a second zinc-sulfur concentrate; adding the activating agent and the third collecting agent into the zinc-sulfur roughing tailings and then carrying out at least one time of zinc-sulfur scavenging to obtain tailings;
(d) mixing the first zinc-sulfur concentrate obtained in the step (b) and the second zinc-sulfur concentrate obtained in the step (c) to obtain zinc-sulfur bulk concentrate; carrying out second ore grinding treatment and leaching on the zinc-sulfur bulk concentrate in sequence to obtain pregnant solution and zinc-sulfur leaching residue; adding the pH regulator, the activating agent, the third collecting agent and the foaming agent into the zinc-sulfur leaching residue, and then performing at least one time of zinc-sulfur separation and roughing to obtain zinc rough concentrate and sulfur rough concentrate;
in the step (d), the third collecting agent is added into the zinc-sulfur leaching residue in an amount of 120-200 g per ton of the gold ore crude ore;
(e) adding the pH regulator into the zinc rough concentrate obtained in the step (d) and then performing at least one zinc concentration to obtain zinc concentrate; adding the activating agent and the third collecting agent into the sulfur rough concentrate obtained in the step (d) and then carrying out sulfur scavenging for at least one time to obtain sulfur concentrate;
in the step (e), the third collecting agent is added into the sulfur rough concentrate in an amount of 120-200 g per ton of the gold ore crude ore;
the third collector is selected from at least one of isopropyl xanthate, butyl xanthate, or isoamyl xanthate.
2. The beneficiation method for the associated low-grade copper, lead, zinc and silver in the gold ore according to claim 1, characterized in that the gold ore raw ore is subjected to third ore grinding to obtain gold ore pulp; in the gold ore raw ore, the grade of gold is more than or equal to 1.5g/t, the grade of silver is less than or equal to 10.00g/t, the grade of copper is less than or equal to 0.1%, the grade of lead is less than or equal to 0.1%, the grade of zinc is 0.30-0.80%, and the grade of sulfur is more than 4%; the concentration of the gold ore pulp is 28-42 wt%; the gold ore pulp contains 55-75 wt% of particles with fineness less than or equal to 74 mu m;
in the step (d), particles with fineness less than or equal to 20 μm in the zinc-sulfur bulk concentrate after the second ore grinding treatment account for 70-95 wt%.
3. The beneficiation method for the accompanying low-grade copper, lead, zinc and silver in gold ores according to claim 2, wherein the first collector is selected from at least one of ethyl xanthate, isopropyl xanthate, butyl xanthate, isoamyl xanthate, ethionamide, aniline nigride, butyl ammonium nigride or ethiazide;
in the step (a), the amount of the first collecting agent added into the gold ore pulp is 20-200 g per ton of the gold ore raw ore; in the step (c), 5-200 g of the first collecting agent is added into the equal-floatable rough concentration tailings in each ton of the gold ore raw ore; the second collecting agent is selected from at least one of ethyl xanthate, ethioamine, aniline nigre, butylammonium nigre or ethionamide; in the step (b), the amount of the second collecting agent added to each ton of the gold ore raw ore is 0.1-20 g.
4. The beneficiation method for the accompanying low-grade copper, lead, zinc and silver in the gold ore according to claim 2, wherein in the step (c), the third collecting agent is added into the equal-floatable tailings in an amount of 20-200 g per ton of the gold ore raw ore; in the step (c), 5-200 g of the third collecting agent is added into the zinc-sulfur rough tailings in each ton of the gold ore raw ore.
5. The beneficiation method for the accompanying low-grade copper, lead, zinc and silver in the gold ore according to claim 2, wherein the foaming agent is at least one selected from methyl isobutyl carbinol, pine oil, alcohols and butyl ether alcohol;
in the step (c), the amount of the foaming agent added into the equal-floatable scavenging tailings is 0.1-30 g per ton of the gold ore raw ore; in the step (d), the amount of the foaming agent added into the zinc-sulfur leaching residue is 0.1-20 g per ton of the gold ore raw ore.
6. The beneficiation method for the accompanying low-grade copper, lead, zinc and silver in the gold ore according to claim 2, wherein the pH adjusting agent is at least one selected from lime, sodium hydroxide, sodium humate and calcium chloride;
in the step (d), the amount of the pH regulator added into the zinc-sulfur leaching residue is 20-800 g per ton of the gold ore crude ore; in the step (e), the amount of the pH regulator added to the zinc rough concentrate is 20-800 g per ton of the gold ore raw ore.
7. The method for beneficiation of associated low-grade copper, lead, zinc and silver in gold ores according to claim 2, wherein the inhibitor is selected from zinc sulfate and/or sodium sulfite.
8. The beneficiation method for the low-grade copper, lead, zinc and silver associated in the gold ore according to claim 2, wherein the activator is at least one selected from copper sulfate, copper nitrate or lead nitrate;
in the step (c), the amount of the activating agent added into the equal-floatable scavenging tailings is 20-200 g per ton of the gold ore raw ore; in the step (c), the amount of the activating agent added into the zinc-sulfur roughed tailings is 20-200 g per ton of the gold ore raw ore; in the step (d), 10-200 g of the activating agent is added into the zinc-sulfur leaching residue per ton of the gold ore crude ore; in the step (e), 10-200 g of the activating agent is added into the sulfur rough concentrate per ton of the gold ore raw ore.
9. The method for beneficiation of associated low-grade copper, lead, zinc and silver in gold ores according to claim 2, wherein the leached leaching agent comprises sodium cyanide and/or potassium cyanide;
in the step (d), 50-5000 g of the leaching agent is added to each ton of the gold ore raw ore.
10. A utilization method of gold ore associated with low-grade copper, lead, zinc and silver, comprising the ore dressing method of the low-grade copper, lead, zinc and silver associated with the gold ore of any one of claims 1 to 9.
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