CN111659529A - Method for separating and utilizing micro-fine particle embedded lead-zinc oxide ore by dressing and smelting - Google Patents

Abstract

The invention discloses a method for beneficiation, metallurgy, separation and utilization of fine-grain embedded lead-zinc oxide ore, belonging to the technical field of mineral processing. In the present invention, after crushing, grinding and sizing of fine-grained embedded lead-zinc oxide ore, a combination inhibitor is added to synergistically suppress gangue minerals, a copper-ammine complex is added to activate lead-zinc minerals in a step-by-step manner, and a combined vulcanizing agent is added to synergize sulfide oxidation. Lead-zinc minerals, adding a combined collector to strengthen the hydrophobicity of the sulfided lead-zinc oxide minerals, effectively remove the gangue minerals in the ore, and obtain the lead-zinc flotation mixed concentrate, and then use sulfuric acid to leaching the zinc minerals in it, solidify the ore. The lead-containing leaching residue and the zinc-containing leaching solution are obtained after liquid separation; the lead-containing leaching residue adopts methanesulfonic acid as the leaching agent, and the lead minerals are leached by heating and stirring to obtain the lead-containing leaching solution; the invention solves the problem of micro-particle embedding economically and efficiently. The technical problem that the lead-zinc oxide ore is difficult to separate has improved the comprehensive utilization rate of lead-zinc resources, and the social, environmental and economic benefits are remarkable.

Description

A method for beneficiation, metallurgy, separation and utilization of fine-grain embedded lead-zinc oxide ore

technical field

The invention relates to a method for beneficiation, metallurgy, separation and utilization of fine-grained embedded lead-zinc oxide ore, belonging to the technical field of mineral processing.

Background technique

For a long time, lead-zinc smelting has always used sulfide minerals as raw materials. However, with the continuous consumption of limited lead-zinc sulfide resources, the existing lead-zinc sulfide minerals can no longer meet the growing demand for metals. Therefore, in order to ensure the preservation of lead-zinc metals The high-efficiency development and utilization of lead-zinc oxide ore has become inevitable. Lead-zinc oxide ore is an important lead-zinc mineral resource in my country, with abundant reserves, but it has the characteristics of being poor, fine, miscellaneous, and seriously muddy, and this type of ores contains a large amount of soluble salts; compared with lead-zinc sulfide minerals, lead oxide Zinc minerals have higher solubility and surface hydrophilicity, so a large number of lead-zinc oxide mineral resources have not been fully exploited yet, and a considerable part of low-grade lead-zinc oxide minerals are stored near the mine after mining, which not only causes resource waste, It can also cause environmental problems.

Ore beneficiation is an important method for enriching lead oxide ore. However, due to the large number of minerals in lead oxide ore, the ore structure is complex, the associated components are unstable, and it contains a large amount of activated quartz, calcite and soluble salt minerals. There are still some problems in the recovery of ore by beneficiation. The pyrotechnic process can process lead-zinc oxide ore with high grade of lead and zinc and low calcium and magnesium content. Large, lead and zinc losses are high, and the amount of additives is large; in addition, the pyrotechnic recovery of lead and zinc has different degrees of lead vapor pollution, and the environmental risk is relatively large. At present, the leaching process is commonly used to extract lead-zinc oxide ore, and the leaching solution obtained after sulfuric acid leaching can directly extract metallic zinc through solvent extraction or electrowinning process. higher, and the cost of follow-up treatment is higher; when using alkaline system, ammonium salt system, and chloride salt system to leaching lead-zinc oxide ore, the amount of leaching slag is large, the alkali content in the slag is high, and at the same time, a strong alkali leaching slag that is difficult to handle will be formed. The accumulation of a large amount of strong alkaline leaching residue will cause secondary pollution and cause great environmental risks, which greatly limits the promotion of this process.

Fine-grained embedded lead-zinc oxide ore is a kind of lead-zinc oxide ore that is extremely difficult to separate. Even if the fine grinding process is used, the lead-zinc oxide minerals in the ore cannot be effectively dissociated. It is difficult to separate lead and zinc by traditional beneficiation methods. The mutual content of lead and zinc in the product is high, and it is difficult to meet the needs of the subsequent treatment process. Therefore, it is urgent to develop a new process that can efficiently separate and utilize fine-grain embedded lead-zinc oxide ore, so as to maximize the comprehensive utilization rate of such resources, alleviate the contradiction between supply and demand of lead and zinc, and increase enterprise benefits.

SUMMARY OF THE INVENTION

The invention provides a fine-grain embedded type lead-zinc oxide ore dressing and smelting in order to solve the technical problems that the fine-grain embedded type lead-zinc oxide ore is difficult to separate by a single flotation process, the single leaching method is high in cost, and the impurity elements in the leaching solution are high. The method of separation and utilization is that after the fine-grain embedded lead-zinc oxide ore is crushed, ground, and pulped, a combination inhibitor is added to synergistically inhibit the gangue minerals, a copper-ammine complex is added to activate the lead-zinc minerals, and a combined sulfide is added. The sulfided lead-zinc oxide minerals are sulfided together with the combined collectors, and the sulfided lead-zinc oxide minerals are strengthened and hydrophobic, and the gangue minerals in the ore are effectively thrown away to obtain the lead-zinc flotation mixed concentrate, and then sulfuric acid is used to leaching the ore in it. Zinc minerals, lead-containing leaching residue and zinc-containing leaching solution are obtained after solid-liquid separation; lead-containing leaching residues use methanesulfonic acid as leaching agent, and lead minerals are leached by heating and stirring to obtain lead-containing leaching solution; The technical problem that the fine-grained embedded lead-zinc oxide ore is difficult to separate has improved the comprehensive utilization rate of lead-zinc resources, and has significant social, environmental and economic benefits.

A method for beneficiation, metallurgy, separation and utilization of fine-grain embedded lead-zinc oxide ore, the specific steps are as follows:

(1) The mass percentage of fine-grained embedded lead-zinc oxide ore is crushed and ground to -74μm size, accounting for 80-90%, and the mass percentage of the pulp is adjusted to 30-40%. The combined inhibitor, the cupro-ammine complex A, the combined vulcanizing agent, the cupro-ammine complex B, the combined collector and the foaming agent are added in sequence, and the roughing operation is carried out to obtain roughing concentrate and roughing tailings;

(2) in step (1) roughing tailings are sequentially added combined inhibitor, cuproammine complex A, combined vulcanizing agent, cuproammine complex B, combined collector and foaming agent to carry out a sweep The operation obtains a sweeping concentrate and a sweeping tailings, of which the first sweeping concentrate is returned to the slurry to be incorporated into the roughing operation; in the first sweeping tailings, a combination inhibitor, a copper ammonia complex A, a combination of Sulfurizing agent, copper ammonia complex B, combined collector and foaming agent, carry out secondary sweeping operation to obtain secondary sweeping concentrate and flotation tailings, of which the secondary sweeping concentrate is returned to slurry mixing and incorporated One scan job;

(3) Perform a beneficiation operation on the rougher concentrate in step (1) to obtain a beneficiary concentrate and a beneficiary tailings, a beneficiation tailings are returned to the slurry to be incorporated into the roughing operation, and a beneficiation concentrate is carried out The secondary beneficiation operation obtains lead-zinc flotation mixed concentrate and secondary beneficiation tailings, of which the secondary beneficiary tailings are returned to slurry mixing and merged into the primary beneficiation operation;

(4) Slurrying the lead-zinc flotation mixed concentrate obtained in step (3), and performing sulfuric acid leaching for 60-120 min under stirring conditions at a temperature of 45-75°C, and obtaining lead-containing leaching slag and lead-containing leaching slag after solid-liquid separation Zinc leaching solution;

(5) slurrying the lead-containing leaching residue obtained in step (4), under stirring conditions at a temperature of 40 to 60° C., leaching with methanesulfonic acid for 35 to 55 minutes, and obtaining a lead-containing solution and a leaching tail after solid-liquid separation scum.

Calculated per ton of fine-grained embedded lead-zinc oxide ore, in the step (1), add 1400-2200 g of combined inhibitor, 500-900 g of copper ammonia complex A, 3200 to 7600 g of combined vulcanizing agent, and copper ammonia complex Compound B 300-600g, combined collector 800-1400g, foaming agent 60-80g.

Calculated per ton of fine-grained embedded lead-zinc oxide ore, the step (2) is followed by adding 700-1100 g of combined inhibitor, 250-450 g of copper ammine complex A, and 1600-3800 g of combined vulcanizing agent into the roughing tailings in step (2). , Copper ammonia complex B150～300g, combined collector 400～700g, foaming agent 30～40g.

In the step (2), 350-550 g of combined inhibitor, 125-225 g of copper-ammine complex A, and 800-800 g of combined vulcanizing agent are sequentially added to the tailings in step (2) in terms of per ton of fine-grained embedded lead-zinc oxide ore. 1900g, copper ammonia complex B75-150g, combined collector 200-350g, foaming agent 15-20g.

In the step (4) of the lead-zinc flotation mixed concentrate, the slurry concentration is such that the liquid-solid mass ratio of the slurry is 3:1, and the sulfuric acid concentration is 55-135 g/L.

In the step (5), the concentration of the lead-containing leaching slag is adjusted so that the liquid-solid mass ratio of the pulp is 3:1, and the concentration of the methanesulfonic acid is 45-95 g/L.

The combined inhibitor includes water glass, sodium tripolyphosphate and carboxymethyl cellulose, wherein the mass ratio of water glass, sodium tripolyphosphate and carboxymethyl cellulose is 4:3:3.

The combined vulcanizing agent includes sodium sulfide, sodium polysulfide and sodium hydrosulfide, wherein the mass ratio of sodium sulfide, sodium polysulfide and sodium hydrosulfide is 5:2:3.

The combined collector includes isopentyl xanthate, ethionine and butylammonium black medicine, wherein the mass ratio of isopentyl xanthate, ethionine and butylammonium black medicine is 4:3:3.

Described cuprammonium complex A and cuprammonium complex B are identical cuprammonium complexes, and the preparation method thereof is:

1) using concentrated ammonia water to carry out stirring and leaching of high-purity copper oxide minerals to obtain a copper ammine complex solution;

2) The copper ammine complex solution of step 1) is placed in an ethanol solution for multiple crystallization to obtain the activator copper ammine complex.

Preferably, the foaming agent is terpineol oil.

Beneficial effects of the present invention:

(1) the present invention adopts the copper ammine complex to carry out the cascade activation of the lead-zinc minerals in the fine-grained embedded lead-zinc oxide ore, enhances the mineral surface reactivity, promotes the mineral surface vulcanization reaction, and forms a thicker and more stable sulfide layer , to achieve enhanced vulcanization; at the same time, copper ammonia complex ions can also selectively adsorb on the surface of lead-zinc oxide minerals after enhanced vulcanization, thereby enhancing the adsorption of collectors and improving the hydrophobicity of the mineral surface;

(2) The present invention synergistically inhibits gangue minerals by combining inhibitors, activates lead-zinc oxide minerals in a step-by-step manner with copper ammine complexes, combines vulcanizing agents to synergistically sulfide lead-zinc oxide minerals, and adds combined collectors to strengthen the hydrophobic surface of the vulcanized minerals. , which not only realizes the effective enrichment of lead and zinc minerals in the ore, but also removes a large number of gangue minerals that are not conducive to the leaching process, greatly reducing the amount of ore in the leaching process, reducing the content of impurity elements in the leaching solution, and reducing the amount of ore. processing costs;

(3) the present invention adopts sulfuric acid leaching lead-zinc flotation mixed concentrate to obtain lead-containing leaching residue and zinc-containing leaching solution, and the lead-containing leaching residue is leached with methanesulfonic acid to obtain lead-containing leaching solution and leaching tailings, and realizes fine particles The efficient recovery and separation of embedded lead-zinc oxide ore economically and efficiently solves the technical problems that the fine-grain embedded lead-zinc oxide ore is difficult to separate by a single flotation process, the single leaching method is costly, and the impurity elements in the leaching solution are high. .

Description of drawings

Fig. 1 is a process flow diagram of the present invention.

Detailed ways

The present invention will be described in further detail below with reference to specific embodiments, but the protection scope of the present invention is not limited to the content.

In the following embodiments of the present invention, the combined inhibitor includes water glass, sodium tripolyphosphate and carboxymethyl cellulose, wherein the mass ratio of water glass, sodium tripolyphosphate and carboxymethyl cellulose is 4:3:3; the combined vulcanization Agents include sodium sulfide, sodium polysulfide and sodium hydrosulfide, wherein the mass ratio of sodium sulfide, sodium polysulfide and sodium hydrosulfide is 5:2:3; combined collectors include isopentyl xanthate, ethionine and butylated Ammonium black medicine, wherein the mass ratio of isopentyl xanthate, ethionine and butylammonium black medicine is 4:3:3; foaming agent is terpineol oil;

Cuprammonium complex A and cuprammonium complex B are identical cuprammonium complexes, and their preparation method is:

1) using concentrated ammonia water to carry out stirring and leaching of high-purity copper oxide minerals to obtain a copper ammine complex solution;

2) The copper ammine complex solution of step 1) is placed in an ethanol solution for multiple crystallization to obtain the activator copper ammine complex.

Embodiment 1: The mass percentage content of lead in the fine-grained embedded lead-zinc oxide ore of this embodiment is 4.3%, and the mass percentage content of zinc is 5.4%;

As shown in Figure 1, a kind of method for beneficiation and smelting separation and utilization of fine-grain embedded type lead-zinc oxide ore, the concrete steps are as follows:

(1) The fine-grained embedded lead-zinc oxide ore is crushed and ground to -74μm with a mass percentage of 90%, and the pulp is slurried until the mass percentage concentration of the pulp is 30%. Type lead-zinc oxide ore, add 1400g combined inhibitor, 500g cupro-ammine complex A, 3200g combined vulcanizing agent, 300g cupro-ammine complex B, 800g combined collector and 60g foaming agent in the pulp in sequence, and carry out The roughing operation produces rougher concentrate and rougher tailings;

(2) in terms of each ton of fine-grain embedded lead-zinc oxide ore, in step (1) roughing tailings, add 700g combined inhibitor, 250g cupro ammonia complex A, 1600g combined vulcanizing agent, 150g cupro ammonia Complex B, 400g combined collector and 30g foaming agent, carry out a sweep operation to obtain a sweep concentrate and a sweep tailing, of which the first sweep concentrate is returned to slurry mixing and incorporated into the roughing operation; 350g of combined inhibitor, 125g of cupro-ammine complex A, 800g of combined vulcanizing agent, 75g of cupro-ammine complex B, 200g of combined collector and 15g of foaming agent were added to the tailings in the first sweep, and the secondary sweep was carried out. The operation obtains secondary scavenging concentrates and flotation tailings, of which the secondary scavenging concentrates are returned to slurry and merged into the primary scavenging operation;

(3) Perform a beneficiation operation on the rougher concentrate in step (1) to obtain a beneficiary concentrate and a beneficiary tailings, a beneficiation tailings are returned to the slurry to be incorporated into the roughing operation, and a beneficiation concentrate is carried out The secondary beneficiation operation obtains lead-zinc flotation mixed concentrate and secondary beneficiation tailings, of which the secondary beneficiary tailings are returned to slurry mixing and merged into the primary beneficiation operation;

(4) the lead-zinc flotation mixed concentrate obtained in step (3) is slurried to a liquid-solid mass ratio of 3:1, and the sulfuric acid is carried out under the stirring condition that the temperature is 45° C. and the sulfuric acid concentration is 55 g/L. After leaching for 120min, lead-containing leaching residue and zinc-containing leaching solution are obtained after solid-liquid separation;

(5) the liquid-solid mass ratio of the lead-containing leaching slag of step (4) gained to slurry is 3:1, under the stirring condition that temperature is 40 ℃, methanesulfonic acid concentration is 45g/L, carry out methyl acid The base sulfonic acid was leached for 55 minutes, and the lead-containing solution and the leaching tailings were obtained after solid-liquid separation;

In this example, the recovery rate of lead was 87.8%, and the recovery rate of zinc was 88.3%.

Embodiment 2: the mass percentage content of lead in the fine-grained embedded lead-zinc oxide ore of this embodiment is 5.4%, and the mass percentage content of zinc is 6.8%;

As shown in Figure 1, a kind of method for beneficiation and smelting separation and utilization of fine-grain embedded type lead-zinc oxide ore, the concrete steps are as follows:

(1) The fine-grained embedded lead-zinc oxide ore is crushed and ground to -74μm with a mass percentage of 85%, and the pulp is slurried until the mass percentage concentration of the ore pulp is 35%. Type lead-zinc oxide ore, add 1800g combined inhibitor, 700g cupro-ammine complex A, 5400g combined vulcanizing agent, 450g cupro-ammine complex B, 1100g combined collector and 70g foaming agent in the pulp in sequence, and carry out The roughing operation produces rougher concentrate and rougher tailings;

(2) In terms of each ton of fine-grained embedded type lead-zinc oxide ore, in step (1) the roughing tailings were successively added with 900g combined inhibitor, 350g copper ammonia complex A, 2700g combined vulcanizing agent, 225g copper ammonia Complex B, 550g combined collector and 35g foaming agent, carry out a sweeping operation to obtain a sweeping concentrate and a sweeping tailings, of which the first sweeping concentrate is returned to slurry mixing and is incorporated into the roughing operation; 450g of combined inhibitor, 175g of copper ammonia complex A, 1350g of combined vulcanizing agent, 112g of copper ammonia complex B, 275g of combined collector and 17g of foaming agent were added to the tailings in the first sweep, and the second sweep was carried out. The operation obtains secondary scavenging concentrates and flotation tailings, of which the secondary scavenging concentrates are returned to slurry and merged into the primary scavenging operation;

(3) Perform a beneficiation operation on the rougher concentrate in step (1) to obtain a beneficiary concentrate and a beneficiary tailings, a beneficiation tailings are returned to the slurry to be incorporated into the roughing operation, and a beneficiation concentrate is carried out The secondary beneficiation operation obtains lead-zinc flotation mixed concentrate and secondary beneficiation tailings, of which the secondary beneficiary tailings are returned to slurry mixing and merged into the primary beneficiation operation;

(4) the lead-zinc flotation mixed concentrate obtained in step (3) is slurried to a liquid-solid mass ratio of 3:1, and the sulfuric acid is carried out under the stirring condition that the temperature is 60° C. and the sulfuric acid concentration is 95 g/L. After leaching for 90 minutes, lead-containing leaching residue and zinc-containing leaching solution are obtained after solid-liquid separation;

(5) the liquid-solid mass ratio of the lead-containing leaching slag obtained in step (4) to slurry is 3:1, and the temperature is 50 ° C and the methanesulfonic acid concentration is under the stirring condition of 75 g/L. The base sulfonic acid was leached for 45 minutes, and the lead-containing solution and the leaching tailings were obtained after solid-liquid separation;

In this example, the recovery rate of lead was 88.2%, and the recovery rate of zinc was 89.1%.

Embodiment 3: the mass percentage content of lead in the fine-grained embedded lead-zinc oxide ore of this embodiment is 6.7%, and the mass percentage content of zinc is 7.3%;

As shown in Figure 1, a kind of method for beneficiation and smelting separation and utilization of fine-grain embedded type lead-zinc oxide ore, the concrete steps are as follows:

(1) The fine-grained embedded lead-zinc oxide ore is crushed and ground to -74 μm with a mass percentage of 80%, and the pulp is adjusted to a mass percentage concentration of 40%. Type lead-zinc oxide ore, add 2200g combined inhibitor, 900g cupro-ammine complex A, 7600g combined vulcanizing agent, 600g cupro-ammine complex B, 1400g combined collector and 80g foaming agent in the pulp in sequence, and carry out The roughing operation produces rougher concentrate and rougher tailings;

(2) In terms of per ton of fine-grained embedded lead-zinc oxide ore, in step (1) roughing tailings were sequentially added 1100g combined inhibitor, 450g copper ammonia complex A, 3800g combined vulcanizing agent, 300g copper ammonia Complex B, 700g of combined collector and 40g of foaming agent, carry out a sweeping operation to obtain a sweeping concentrate and a sweeping tailings, of which the first sweeping concentrate is returned to slurry mixing and is incorporated into the roughing operation; 550g combined inhibitor, 225g copper ammonia complex A, 1900g combined vulcanizing agent, 150g copper ammonia complex B, 350g combined collector and 20g foaming agent were sequentially added to the tailings in the first sweep for secondary sweep. The operation obtains secondary scavenging concentrates and flotation tailings, of which the secondary scavenging concentrates are returned to slurry and merged into the primary scavenging operation;

(3) Perform a beneficiation operation on the rougher concentrate in step (1) to obtain a beneficiary concentrate and a beneficiary tailings, a beneficiation tailings are returned to the slurry to be incorporated into the roughing operation, and a beneficiation concentrate is carried out The secondary beneficiation operation obtains lead-zinc flotation mixed concentrate and secondary beneficiation tailings, of which the secondary beneficiary tailings are returned to slurry mixing and merged into the primary beneficiation operation;

(4) the lead-zinc flotation mixed concentrate obtained in step (3) is slurried to a liquid-solid mass ratio of 3:1, and the sulfuric acid is carried out under the stirring condition that the temperature is 75° C. and the sulfuric acid concentration is 135 g/L. After leaching for 60min, lead-containing leaching residue and zinc-containing leaching solution are obtained after solid-liquid separation;

(5) the liquid-solid mass ratio of the lead-containing leaching slag of step (4) gained to slurry is 3:1, under the stirring condition that temperature is 60 DEG C, the methanesulfonic acid concentration is 95g/L, carry out methyl acid The base sulfonic acid was leached for 35 minutes, and the lead-containing solution and the leaching tailings were obtained after solid-liquid separation;

In this example, the recovery rate of lead was 89.4%, and the recovery rate of zinc was 90.3%.

Claims (10)

1. a method for beneficiation and smelting separation and utilization of micro-grain embedded type lead-zinc oxide ore, is characterized in that, concrete steps are as follows: (1) The mass percentage of fine-grained embedded lead-zinc oxide ore is crushed and ground to -74μm size, accounting for 80-90%, and the mass percentage of the pulp is adjusted to 30-40%. The combined inhibitor, the cupro-ammine complex A, the combined vulcanizing agent, the cupro-ammine complex B, the combined collector and the foaming agent are added in sequence, and the roughing operation is carried out to obtain roughing concentrate and roughing tailings; (2) in step (1) roughing tailings are sequentially added combined inhibitor, cuproammine complex A, combined vulcanizing agent, cuproammine complex B, combined collector and foaming agent to carry out a sweep The operation obtains a sweeping concentrate and a sweeping tailings, of which the first sweeping concentrate is returned to slurry and merged into the roughing operation; in the first sweeping tailings, the combination inhibitor, copper ammonia complex A, combination Sulfurizing agent, copper ammonia complex B, combined collector and foaming agent, carry out secondary sweeping operation to obtain secondary sweeping concentrate and flotation tailings, of which the secondary sweeping concentrate is returned to slurry mixing and merged into One scan job; (3) Perform a beneficiation operation on the rougher concentrate in step (1) to obtain a beneficiary concentrate and a beneficiary tailings, a beneficiation tailings are returned to the slurry to be incorporated into the roughing operation, and a beneficiation concentrate is carried out The secondary beneficiation operation obtains lead-zinc flotation mixed concentrate and secondary beneficiation tailings, of which the secondary beneficiary tailings are returned to slurry mixing and merged into the primary beneficiation operation; (4) Slurrying the lead-zinc flotation mixed concentrate obtained in step (3), and performing sulfuric acid leaching for 60-120 min under stirring conditions at a temperature of 45-75°C, and obtaining lead-containing leaching slag and lead-containing leaching slag after solid-liquid separation Zinc leaching solution; (5) slurrying the lead-containing leaching residue obtained in step (4), under stirring conditions at a temperature of 40 to 60° C., leaching with methanesulfonic acid for 35 to 55 minutes, and obtaining a lead-containing solution and a leaching tail after solid-liquid separation scum. 2. the method for separation and utilization of micro-grain embedded type lead-zinc oxide ore according to claim 1, it is characterized in that: in every ton of micro-grain embedded type lead-zinc oxide ore, add in step (1) ore pulp 1400-2200 g of combined inhibitor, 500-900 g of copper ammonia complex A, 3200 to 7600 g of combined vulcanizing agent, 300 to 600 g of copper ammonia complex B, 800 to 1400 g of combined collector, and 60 to 80 g of foaming agent. 3. the method for separation and utilization of micro-grain embedded type lead-zinc oxide ore according to claim 1, is characterized in that: in every ton of micro-grain embedded type lead-zinc oxide ore, step (2) rough selection tail Add 700-1100 g of combined inhibitor, 250-450 g of copper ammine complex A, 1600-3800 g of combined vulcanizing agent, 150-300 g of copper ammine complex B, 400-700 g of combined collector, and 30 ~40g. 4. the method according to claim 1 and 3 described fine-grain embedded type lead-zinc oxide beneficiation and smelting separation and utilization, it is characterized in that: in every ton of fine-grain embedded type lead-zinc oxide ore, step (2) is once Sweep the tailings and sequentially add 350-550 g of combined inhibitor, 125-225 g of copper ammine complex A, 800-1900 g of combined vulcanizing agent, 75-150 g of copper ammine complex B, and 200-350 g of combined collector. Foaming agent 15 ~ 20g. 5. the method for fine-grain embedded type lead-zinc oxide beneficiation separation and utilization according to claim 1, it is characterized in that: step (4) lead-zinc flotation mixed concentrate slurry mixing concentration is the liquid-solid mass ratio of ore pulp It is 3:1, and the concentration of sulfuric acid is 55~135g/L. 6. the method for separation and utilization of micro-grain embedded type lead-zinc oxide ore dressing and smelting according to claim 1, is characterized in that: step (5) lead-containing leaching slag mixing concentration is that the liquid-solid mass ratio of ore pulp is 3: 1. The concentration of methanesulfonic acid is 45～95g/L. 7. The method for beneficiation and smelting separation and utilization of fine-grain embedded lead-zinc oxide ore according to claim 1, characterized in that: the combined inhibitor comprises water glass, sodium tripolyphosphate and carboxymethyl cellulose, wherein water glass The mass ratio of , sodium tripolyphosphate and carboxymethyl cellulose is 4:3:3. 8. the method according to claim 1, characterized in that: the combination vulcanizing agent comprises sodium sulfide, sodium polysulfide and sodium hydrosulfide, wherein sodium sulfide, polysulfide The mass ratio of sodium and sodium hydrosulfide is 5:2:3. 9. the method according to claim 1, characterized in that: the combined collector comprises isopentyl xanthate, ethyl disulfide and butylammonium black medicine, wherein The mass ratio of isopentyl xanthate, ethionine and butylammonium black medicine is 4:3:3. 10. the method according to claim 1, characterized in that: the copper ammonia complex A and the copper ammonia complex B are identical copper ammonia complexes , its preparation method is: 1) using concentrated ammonia water to carry out stirring and leaching of high-purity copper oxide minerals to obtain a copper ammine complex solution; 2) The copper ammine complex solution of step 1) is placed in an ethanol solution for multiple crystallization to obtain the activator copper ammine complex.

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