CN111659531B - Method for flotation separation of lead-zinc sulfide ore containing intergrowth - Google Patents
Method for flotation separation of lead-zinc sulfide ore containing intergrowth Download PDFInfo
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- CN111659531B CN111659531B CN202010549692.0A CN202010549692A CN111659531B CN 111659531 B CN111659531 B CN 111659531B CN 202010549692 A CN202010549692 A CN 202010549692A CN 111659531 B CN111659531 B CN 111659531B
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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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
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
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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
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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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
Abstract
The invention discloses a flotation separation method of lead-zinc sulfide ore containing intergrowths, belonging to the technical field of mineral processing. The method adopts the mixed flotation to enrich the lead-zinc sulfide ore containing the intergrowth, so as to obtain lead-zinc mixed rough concentrate and flotation tailings; and carrying out flotation and tailing discarding on the lead-zinc bulk rough concentrate by adding a combined gangue inhibitor to obtain lead-zinc bulk concentrate with higher lead-zinc content and obviously reduced ore amount, finely grinding the lead-zinc bulk concentrate, and carrying out flotation separation by adopting a zinc-inhibiting lead-floating process to obtain zinc concentrate and lead concentrate. According to the method, lead and zinc minerals in the ore are synchronously enriched through the mixed flotation, the lead and zinc mixed rough concentrate is subjected to flotation and tailing discarding, the lead and zinc grade is improved, the ore treatment capacity in the fine grinding process is reduced, the monomer dissociation of the lead and zinc minerals in the mixed concentrate is realized through the fine grinding, the zinc floating lead suppression is facilitated, the problem of the flotation separation of the lead and zinc sulfide ore containing the intergrowth is solved, and the comprehensive utilization rate of lead and zinc resources is improved.
Description
Technical Field
The invention relates to a method for flotation separation of lead-zinc sulfide ore containing intergrowths, belonging to the technical field of mineral processing.
Background
Lead-zinc metal is widely used in the fields of electrical industry, mechanical industry, military industry, chemical industry and the like. Lead-zinc sulfide ore is the main mineral resource for extracting lead-zinc metal, wherein the vast majority of lead yield in industry is derived from galena, and zinc yield is derived from sphalerite and sphalerite. Lead and zinc have strong thiophilic property, and the mineralization condition and geochemical behavior of the lead and zinc sulfide are similar, so that lead and zinc sulfide ore is often closely symbiotic in ore deposits. In view of the complex intercalated structure and uneven intercalated granularity of lead-zinc sulfide ore, multi-stage ore grinding is usually adopted to fully and singly dissociate target minerals in the ore, and then lead-zinc minerals in the ore are recovered through the processes of preferential flotation, mixed flotation, partial mixed flotation, floatation and the like. The preferential flotation is to float different minerals in turn according to the floatability difference of the different minerals in the ore, and is suitable for the ore with higher grade and coarser disseminated granularity; the mixed flotation is to perform synchronous flotation enrichment on copper, lead and zinc sulfide minerals in ores and then perform mutual separation, and is suitable for ores with low lead and zinc content, close symbiotic relationship of lead and zinc sulfide ores, fine embedding and easy intergrowth of sulfide minerals dissociated from gangue minerals during ore grinding; the partial mixed flotation is to separate the copper and lead minerals in the ores after the mixed flotation, and the copper and lead flotation tailings are subjected to zinc separation, so that the process has the advantages of both preferential flotation and mixed flotation; the floatation is to float various sulfide minerals with similar floatation in the ore together to obtain different bulk concentrates, and then to float and separate the concentrates in sequence.
In the prior art, a large number of intergrowths exist in the fine-grain or micro-fine-grain embedded lead-zinc sulfide ore in the sorting process, so that the lead-zinc separation effect is influenced, meanwhile, the intergrowths containing lead and zinc can increase the lead-zinc content after entering concentrate products, the concentrate grade is reduced, lead and zinc loss can be caused after entering tailings, and the lead-zinc recovery rate is low. The separation process of the high-sulfur lead-zinc ore adopts primary ore grinding, mixed flotation, secondary ore grinding, lead-zinc-sulfur flotation, zinc-sulfur separation and tailing recleaning of zinc, so that the effective separation of lead, zinc and sulfur in the ore is realized; the flotation separation process of the lead-zinc sulfide ore difficult to select comprises the steps of performing lead-zinc mixed flotation after coarse grinding of the ore, then finely grinding lead-zinc mixed concentrate, and realizing lead-zinc separation through a zinc-inhibiting lead flotation process; the method adopts the flotation separation process of high-sulfur lead-zinc ore under the high-concentration environment, preferentially selects lead and associated gold and silver minerals under the high-concentration neutral natural pH flotation environment, adopts two-stage roughing mixing flotation to float the zinc-sulfur minerals from lead flotation tailings, adopts lime to regulate the pH value and potential of ore pulp during the zinc-sulfur separation flotation so as to realize the zinc-sulfur separation, and adds a small amount of activating agent and collecting agent to strengthen the floating of the difficultly-floated zinc minerals.
The method can realize separation of lead and zinc minerals in the ore, but a part of valuable metals are lost in tailings, so that comprehensive recovery of the valuable metals cannot be realized, however, the demand for the lead and zinc metals is continuously increased at present, and the lead and zinc ores which are easy to select are far from meeting the demand for lead and zinc smelting, so that efficient development and utilization of the complex and difficult-to-treat lead and zinc ores become an effective way for solving the problem of lead and zinc resource deficiency. A large amount of intergrowth-containing lead-zinc sulfide ores exist in China, the resources are associated with noble metals such as gold, silver and the like, the comprehensive utilization value is high, but the intergrowth-containing lead-zinc sulfide ores cannot be well developed and utilized due to the limitation of ore dressing technology.
Disclosure of Invention
In a large number of practical processes, the applicant creatively discovers that the reason that valuable metals are lost in tailings is that effective separation and enrichment of lead-zinc sulfide ore intergrowths in ores are not fully considered in a flotation process; aiming at the difficult problem of flotation separation of the lead-zinc sulfide ore containing the intergrowth, the invention provides a method for flotation separation of the lead-zinc sulfide ore containing the intergrowth, namely, the mixed flotation is adopted to enrich the lead-zinc sulfide ore containing the intergrowth, and lead-zinc mixed rough concentrate and flotation tailings are obtained; the lead-zinc bulk concentrates are subjected to flotation and tailing discarding by adding a combined gangue inhibitor to obtain lead-zinc bulk concentrates with higher lead-zinc content and obviously reduced ore amount, and then fine grinding is carried out; and performing flotation separation on the ground lead-zinc bulk concentrate by adopting a zinc-lead inhibition flotation process to obtain zinc concentrate and lead concentrate.
According to the invention, lead and zinc minerals in the ore are synchronously enriched through the mixed flotation, and the obtained lead and zinc mixed rough concentrate is subjected to flotation and tailing discarding, so that the lead and zinc grade is improved, the ore treatment capacity in the fine grinding process is reduced, the monomer dissociation of the lead and zinc minerals in the mixed concentrate is realized through the fine grinding, the zinc and lead flotation is favorably inhibited, the problem of the flotation separation of the lead and zinc sulfide ore containing the intergrowth is economically and efficiently solved, and the comprehensive utilization rate of lead and zinc resources is improved.
A method for flotation separation of lead-zinc sulfide ore containing intergrowths comprises the following specific steps:
(1) crushing and grinding the symbiont-containing lead-zinc sulfide ore until the mass percentage of-74 mu m size fraction accounts for 65-75%, mixing the pulp until the mass percentage concentration of the pulp is 30-40%, sequentially adding lime, a combined inhibitor A, a copper-ammonia complex, a combined collector A and terpineol oil into the pulp, and performing lead-zinc roughing I operation to obtain lead-zinc roughing I concentrate and lead-zinc roughing I tailings; sequentially adding lime, a combined inhibitor A, a copper ammonia complex, a combined collector A and pine oil into the lead-zinc roughing I tailings, and performing lead-zinc roughing II operation to obtain lead-zinc roughing II concentrate and lead-zinc roughing II tailings;
(2) sequentially adding lime, a combined inhibitor A, a copper ammonia complex, a combined collector A and pine oil into the tailings of the lead-zinc roughing II in the step (1), and performing lead-zinc scavenging I operation to obtain a concentrate of the lead-zinc scavenging I and the tailings of the lead-zinc scavenging I, wherein the concentrate of the lead-zinc scavenging I is returned to be size-mixed and is merged into the tailings of the lead-zinc roughing II; sequentially adding lime, a combined inhibitor A and a combined collector A into the lead-zinc scavenging I tailings, and performing lead-zinc scavenging II operation to obtain lead-zinc scavenging II concentrate and flotation tailings, wherein the lead-zinc scavenging II concentrate is returned to be size-mixed and is merged into the lead-zinc scavenging I operation;
(3) combining the lead-zinc roughing I concentrate and the lead-zinc roughing II concentrate obtained in the step (1) to obtain lead-zinc mixed rough concentrate, sequentially adding a combined inhibitor B, a combined collector A and pine oil into the lead-zinc mixed rough concentrate, performing flotation and tailing discarding to obtain lead-zinc mixed concentrate and a flotation and tailing discarding product, wherein the flotation and tailing discarding product is returned to size mixing and is merged into the lead-zinc roughing I operation;
(4) finely grinding the lead-zinc bulk concentrate obtained in the step (3) until the mass percentage content of the-45 mu m size fraction is more than 80%, adjusting the pulp until the mass percentage concentration of the pulp is 35%, sequentially adding a combined inhibitor C, a combined collector B and pine oil into the pulp, and performing zinc suppression and lead floating operation to obtain lead rough concentrate and zinc concentrate;
(5) sequentially adding a combined inhibitor C, a combined collector B and pine oil into the lead rough concentrate obtained in the step (4), and performing lead concentration I operation to obtain lead concentration I concentrate and lead concentration I tailings, wherein the lead concentration I tailings are returned to size mixing and merged into zinc suppression lead flotation operation; and (2) sequentially adding a combined inhibitor C, a combined collector B and the pinitol oil into the lead concentration I concentrate to perform lead concentration II operation to obtain lead concentrate and lead concentration II tailings, wherein the lead concentration II tailings are returned to size mixing and merged into the lead concentration I operation.
Adding 800-1600 g of lime, 1000-2000 g of combined inhibitor A, 200-400 g of copper-ammonia complex, 400-800 g of combined collector A and 40-60 g of pine oil into the ore pulp in the step (1) by each ton of symbiont-containing lead-zinc sulfide ore; 400-800 g of lime, 500-1000 g of combined inhibitor A, 100-200 g of copper-ammonia complex, 200-400 g of combined collector A and 20-30 g of pine oil are added into the lead-zinc roughing I tailings.
Based on each ton of symbiont-containing lead zinc sulfide ore, 200-400 g of lime, 250-500 g of combined inhibitor A, 50-100 g of copper-ammonia complex, 100-200 g of combined collector A and 10-15 g of terpineol oil are added into the tailings of the lead-zinc roughing II in the step (2); 100-200 g of lime, 125-250 g of combined inhibitor A and 50-100 g of combined collector A are added into the tailings I of lead-zinc scavenging.
And (3) adding 600-1000 g of combined inhibitor B, 100-200 g of combined collector A and 20-30 g of pine oil into each ton of intergrowth-containing lead-zinc sulfide ore in the step (3).
And (3) adding 1500-2500 g of combined inhibitor C, 200-400 g of combined collector B and 30-50 g of pine oil into the ore pulp obtained in the step (4) by each ton of symbiont-containing lead-zinc sulfide ore.
And (2) adding 750-1250 g of combined inhibitor C, 100-200 g of combined collector B and 15-25 g of pine oil into each ton of intergrowth-containing lead zinc sulfide ore in the step (5), and adding 375-625 g of combined inhibitor C, 50-100 g of combined collector B and 15-25 g of pine oil into lead concentrate I.
The combination inhibitor A comprises water glass, carboxymethyl cellulose and sodium tripolyphosphate, wherein the mass ratio of the water glass to the carboxymethyl cellulose to the sodium tripolyphosphate is 2:2: 1; the combined collector A comprises butyl xanthate, ethidium nitrate and butyl ammonium blackant, wherein the mass ratio of the butyl xanthate to the ethidium nitrate to the butyl ammonium blackant is 5:4: 1.
The preparation method of the copper ammonia complex comprises the following steps:
1) stirring and leaching the high-purity copper oxide minerals by adopting strong ammonia water to obtain a copper ammonia complex solution;
2) and (3) placing the copper ammonia complex solution obtained in the step 1) in an ethanol solution for crystallization for multiple times to obtain the copper ammonia complex of the activator.
The combined inhibitor B comprises water glass, sodium tripolyphosphate and sodium humate, wherein the mass ratio of the water glass to the sodium tripolyphosphate to the sodium humate is 4:3: 3; the combined collector B comprises ethyl xanthate and ethyl sulfur nitrogen, wherein the mass ratio of the ethyl xanthate to the ethyl sulfur nitrogen is 2: 3.
The combined inhibitor C comprises zinc sulfate, sodium sulfite and sodium sulfide, wherein the mass ratio of the zinc sulfate to the sodium sulfite to the sodium sulfide is 5:3: 2.
The invention has the beneficial effects that:
(1) according to the invention, the mixed flotation process is adopted to treat the lead-zinc sulfide ore containing the intergrowth, so that the synchronous enrichment of lead-zinc minerals in the ore is realized, the lead-zinc grade is improved, a large amount of gangue minerals are removed, the ore treatment capacity in the fine grinding process is reduced, and the ore treatment cost is reduced;
(2) according to the invention, the combined inhibitor is adopted to synergistically inhibit gangue minerals, the combined collector is adopted to synergistically drain target minerals, and the activating agent copper-ammonia complex is adopted to enhance the reaction activity of the mineral surface, promote the adsorption of the collector, improve the hydrophobicity of the mineral surface and increase the recovery rate of coarse particles and intergrowth lead-zinc minerals;
(3) according to the method, the lead-zinc minerals in the ores are synchronously recovered after coarse grinding, the lead-zinc minerals can be prevented from being crushed excessively, the loss of fine-grained minerals is reduced, meanwhile, the proportion of the lead-zinc mineral intergrowth in the mixed rough concentrate is increased, the ore grinding efficiency can be improved through fine grinding, the lead-zinc minerals can be fully and singly dissociated, and lead and zinc separation is realized;
(4) the invention increases the flotation and tailing discarding of lead-zinc mixed rough concentrate, effectively reduces the treatment load of the subsequent process, simultaneously can avoid the interference of the gangue minerals on lead-zinc separation, reduces the lead-zinc content in the concentrate, economically and efficiently solves the problem of separation of the lead-zinc sulfide ore containing the intergrowth, and has remarkable social, environmental and economic benefits.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited to the examples.
The combined inhibitor A in the following examples comprises water glass, carboxymethyl cellulose and sodium tripolyphosphate, wherein the mass ratio of the water glass to the carboxymethyl cellulose to the sodium tripolyphosphate is 2:2: 1; the combined collecting agent A comprises butyl xanthate, ethidium azote and butylammonium melanophore, wherein the mass ratio of the butyl xanthate to the ethidium azote to the butylammonium melanophore is 5:4: 1; the combined inhibitor B comprises water glass, sodium tripolyphosphate and sodium humate, wherein the mass ratio of the water glass to the sodium tripolyphosphate to the sodium humate is 4:3: 3; the combined collector B comprises ethyl xanthate and ethyl sulfur nitrogen, wherein the mass ratio of the ethyl xanthate to the ethyl sulfur nitrogen is 2: 3; the combined inhibitor C comprises zinc sulfate, sodium sulfite and sodium sulfide, wherein the mass ratio of the zinc sulfate to the sodium sulfite to the sodium sulfide is 5:3: 2;
the preparation method of the copper ammonia complex comprises the following steps:
1) stirring and leaching the high-purity copper oxide minerals by adopting strong ammonia water to obtain a copper ammonia complex solution;
2) and (3) placing the copper ammonia complex solution obtained in the step 1) in an ethanol solution for crystallization for multiple times to obtain the copper ammonia complex of the activator.
Example 1: in the intergrowth-containing lead-zinc sulfide ore of the present example, the mass percent content of lead was 3.5%, and the mass percent content of zinc was 4.2%;
as shown in fig. 1, a method for flotation separation of lead-zinc sulfide ore containing consortium includes the following steps:
(1) crushing and grinding the intergrowth-containing lead-zinc sulfide ore until the mass percentage of-74 mu m size fraction accounts for 75%, mixing the pulp until the mass percentage concentration of the pulp is 30%, sequentially adding 800g of lime, 1000g of combined inhibitor A, 200g of copper-ammonia complex, 400g of combined collector A and 40g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore, and performing lead-zinc roughing I operation to obtain lead-zinc roughing I concentrate and lead-zinc roughing I tailings; adding 400g of lime, 500g of combined inhibitor A, 100g of copper ammonia complex, 200g of combined collector A and 20g of terpineol oil into the lead-zinc roughing I tailings in sequence, and performing lead-zinc roughing II operation to obtain lead-zinc roughing II concentrate and lead-zinc roughing II tailings;
(2) according to each ton of intergrowth-containing lead-zinc sulfide ore, sequentially adding 200g of lime, 250g of combined inhibitor A, 50g of copper-ammonia complex, 100g of combined collector A and 10g of terpineol into the lead-zinc roughing II tailings in the step (1), and performing lead-zinc scavenging I operation to obtain lead-zinc scavenging I concentrate and lead-zinc scavenging I tailings, wherein the lead-zinc scavenging I concentrate is returned to be size-mixed and is merged into the lead-zinc roughing II operation; sequentially adding 100g of lime, 125g of combined inhibitor A and 50g of combined collector A into the lead-zinc scavenging I tailings, and performing lead-zinc scavenging II operation to obtain lead-zinc scavenging II concentrate and flotation tailings, wherein the lead-zinc scavenging II concentrate is returned to be size-mixed and is merged into the lead-zinc scavenging I operation;
(3) combining the lead-zinc roughing I concentrate and the lead-zinc roughing II concentrate obtained in the step (1) to obtain lead-zinc mixed rough concentrate, sequentially adding 600g of combined inhibitor B, 100g of combined collector A and 20g of pine oil into each ton of intergrowth-containing lead-zinc sulfide ore, and performing flotation and tailing discarding to obtain lead-zinc mixed concentrate and a flotation and tailing discarding product, wherein the flotation and tailing discarding product is returned for size mixing and is merged into the lead-zinc roughing I operation;
(4) finely grinding the lead-zinc bulk concentrate obtained in the step (3) to reach the mass percentage content of-45 mu m size fraction of 83%, adjusting the pulp to the mass percentage concentration of 35%, and sequentially adding 1500g of combined inhibitor C, 200g of combined collector B and 30g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore to perform zinc-inhibiting and lead-floating operation to obtain lead rough concentrate and zinc concentrate;
(5) sequentially adding 750g of combined inhibitor C, 100g of combined collector B and 15g of pine oil into the lead rough concentrate obtained in the step (4) by each ton of symbiont-containing lead zinc sulfide ore, and performing lead concentration I operation to obtain lead concentration I concentrate and lead concentration I tailings, wherein the lead concentration I tailings are returned to size mixing and merged into zinc inhibition lead flotation operation; sequentially adding 375g of combined inhibitor C, 50g of combined collector B and 15g of terpineol oil into lead concentrate I by each ton of symbiont-containing lead zinc sulfide ore, and performing lead concentrate II operation to obtain lead concentrate and lead concentrate II tailings, wherein the lead concentrate II tailings are returned for size mixing and merged into the lead concentrate I operation;
the recovery rate of lead in this example was 90.2% and the recovery rate of zinc was 87.6%.
Example 2: in the intergrowth-containing lead-zinc sulfide ore of the present example, the mass percent content of lead was 5.2%, and the mass percent content of zinc was 6.7%;
as shown in fig. 1, a method for flotation separation of lead-zinc sulfide ore containing consortium includes the following steps:
(1) crushing and grinding the intergrowth-containing lead-zinc sulfide ore until the mass percentage of-74 mu m size fraction accounts for 70%, mixing the pulp until the mass percentage concentration of the pulp is 35%, sequentially adding 1200g of lime, 1500g of combined inhibitor A, 300g of copper-ammonia complex, 600g of combined collector A and 50g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore, and performing lead-zinc rough separation I operation to obtain lead-zinc rough separation I concentrate and lead-zinc rough separation I tailings; sequentially adding 600g of lime, 750g of combined inhibitor A, 150g of copper ammonia complex, 300g of combined collector A and 25g of terpineol oil into the lead-zinc roughing I tailings, and performing lead-zinc roughing II operation to obtain lead-zinc roughing II concentrate and lead-zinc roughing II tailings;
(2) sequentially adding 300g of lime, 375g of combined inhibitor A, 75g of copper-ammonia complex, 150g of combined collector A and 15g of terpineol oil into the lead-zinc roughing II tailings obtained in the step (1) by taking each ton of intergrowth-containing lead-zinc sulfide ore, and performing lead-zinc scavenging I operation to obtain lead-zinc scavenging I concentrate and lead-zinc scavenging I tailings, wherein the lead-zinc scavenging I concentrate is returned to be size-mixed and is merged into the lead-zinc roughing II operation; sequentially adding 150g of lime, 190g of combined inhibitor A and 75g of combined collector A into the lead-zinc scavenging I tailings, and performing lead-zinc scavenging II operation to obtain lead-zinc scavenging II concentrate and flotation tailings, wherein the lead-zinc scavenging II concentrate is returned to be size-mixed and is merged into the lead-zinc scavenging I operation;
(3) combining the lead-zinc roughing I concentrate and the lead-zinc roughing II concentrate obtained in the step (1) to obtain lead-zinc mixed rough concentrate, sequentially adding 800g of combined inhibitor B, 150g of combined collector A and 25g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore, and performing flotation and tailing discarding to obtain lead-zinc mixed concentrate and a flotation and tailing discarding product, wherein the flotation and tailing discarding product is returned for size mixing and is merged into the lead-zinc roughing I operation;
(4) finely grinding the lead-zinc bulk concentrate obtained in the step (3) to 86 mass percent of minus 45 mu m size fraction, and mixing the pulp until the mass percent concentration of the pulp is 35%, sequentially adding 2000g of combined inhibitor C, 300g of combined collector B and 40g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore, and performing zinc suppression and lead floating operation to obtain lead rough concentrate and zinc concentrate;
(5) adding 1000g of combined inhibitor C, 150g of combined collector B and 20g of terpineol oil into the lead rough concentrate obtained in the step (4) in sequence by taking each ton of symbiont-containing lead zinc sulfide ore, and performing lead concentration I operation to obtain lead concentration I concentrate and lead concentration I tailings, wherein the lead concentration I tailings are returned to size mixing and merged into zinc inhibition lead flotation operation; according to each ton of symbiont-containing lead zinc sulfide ore, sequentially adding 500g of combined inhibitor C, 75g of combined collector B and 20g of terpineol oil into lead concentrate I to perform lead concentration II operation to obtain lead concentrate and lead concentrate II tailings, wherein the lead concentrate II tailings are returned to be size-mixed and merged into the lead concentration I operation;
the recovery rate of lead in this example was 91.6% and the recovery rate of zinc was 89.2%.
Example 3: in the intergrowth-containing lead-zinc sulfide ore of the present example, the mass percent content of lead was 6.9%, and the mass percent content of zinc was 8.3%;
as shown in fig. 1, a method for flotation separation of lead-zinc sulfide ore containing consortium includes the following steps:
(1) crushing and grinding the intergrowth-containing lead-zinc sulfide ore until the mass percentage of-74 mu m size fraction accounts for 65%, mixing the pulp until the mass percentage concentration of the pulp is 40%, sequentially adding 1600g of lime, 2000g of combined inhibitor A, 400g of copper-ammonia complex, 800g of combined collector A and 60g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore, and performing lead-zinc roughing I operation to obtain lead-zinc roughing I concentrate and lead-zinc roughing I tailings; sequentially adding 800g of lime, 1000g of combined inhibitor A, 200g of copper ammonia complex, 400g of combined collector A and 30g of terpineol oil into the lead-zinc roughing I tailings, and performing lead-zinc roughing II operation to obtain lead-zinc roughing II concentrate and lead-zinc roughing II tailings;
(2) adding 400g of lime, 500g of combined inhibitor A, 100g of copper-ammonia complex, 200g of combined collector A and 15g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore II in the step (1) in sequence, and performing lead-zinc scavenging I operation to obtain lead-zinc scavenging I concentrate and lead-zinc scavenging I tailings, wherein the lead-zinc scavenging I concentrate is returned to be size-mixed and is merged into the lead-zinc roughing II operation; sequentially adding 200g of lime, 250g of combined inhibitor A and 100g of combined collector A into the lead-zinc scavenging I tailings, and performing lead-zinc scavenging II operation to obtain lead-zinc scavenging II concentrate and flotation tailings, wherein the lead-zinc scavenging II concentrate is returned to be size-mixed and is merged into the lead-zinc scavenging I operation;
(3) combining the lead-zinc roughing I concentrate and the lead-zinc roughing II concentrate obtained in the step (1) to obtain lead-zinc mixed rough concentrate, sequentially adding 1000g of combined inhibitor B, 200g of combined collector A and 30g of pine oil into each ton of intergrowth-containing lead-zinc sulfide ore, and performing flotation and tailing discarding to obtain lead-zinc mixed concentrate and a flotation and tailing discarding product, wherein the flotation and tailing discarding product is returned for size mixing and is merged into the lead-zinc roughing I operation;
(4) finely grinding the lead-zinc bulk concentrate obtained in the step (3) to 88 mass percent of-45 mu m size fraction, mixing the pulp until the mass percent concentration of the pulp is 35%, and sequentially adding 2500g of combined inhibitor C, 400g of combined collector B and 50g of terpineol oil into each ton of intergrowth-containing lead-zinc sulfide ore to perform zinc-inhibiting and lead-floating operation to obtain lead rough concentrate and zinc concentrate;
(5) based on each ton of intergrowth-containing lead-zinc sulfide ore, sequentially adding 1250g of combined inhibitor C, 200g of combined collector B and 25g of terpineol oil into the lead rough concentrate obtained in the step (4), and performing lead concentration I operation to obtain lead concentration I concentrate and lead concentration I tailings, wherein the lead concentration I tailings are returned for size mixing and are merged into zinc suppression lead flotation operation; sequentially adding 625g of combined inhibitor C, 100g of combined collector B and 25g of terpineol oil into lead concentrate I by each ton of symbiont-containing lead zinc sulfide ore, and carrying out lead concentration II operation to obtain lead concentrate and lead concentrate II tailings, wherein the lead concentrate II tailings are returned for size mixing and merged into the lead concentration I operation;
the recovery rate of lead in this example was 92.8% and the recovery rate of zinc was 90.5%.
Claims (10)
1. A method for flotation separation of lead-zinc sulfide ore containing intergrowths is characterized by comprising the following specific steps:
(1) crushing and grinding the symbiont-containing lead-zinc sulfide ore until the mass percentage of-74 mu m size fraction accounts for 65-75%, mixing the pulp until the mass percentage concentration of the pulp is 30-40%, sequentially adding lime, a combined inhibitor A, a copper-ammonia complex, a combined collector A and terpineol oil into the pulp, and performing lead-zinc roughing I operation to obtain lead-zinc roughing I concentrate and lead-zinc roughing I tailings; sequentially adding lime, a combined inhibitor A, a copper ammonia complex, a combined collector A and pine oil into the lead-zinc roughing I tailings, and performing lead-zinc roughing II operation to obtain lead-zinc roughing II concentrate and lead-zinc roughing II tailings;
(2) sequentially adding lime, a combined inhibitor A, a copper ammonia complex, a combined collector A and pine oil into the tailings of the lead-zinc roughing II in the step (1), and performing lead-zinc scavenging I operation to obtain a concentrate of the lead-zinc scavenging I and the tailings of the lead-zinc scavenging I, wherein the concentrate of the lead-zinc scavenging I is returned to be size-mixed and is merged into the tailings of the lead-zinc roughing II; sequentially adding lime, a combined inhibitor A and a combined collector A into the lead-zinc scavenging I tailings, and performing lead-zinc scavenging II operation to obtain lead-zinc scavenging II concentrate and flotation tailings, wherein the lead-zinc scavenging II concentrate is returned to be size-mixed and is merged into the lead-zinc scavenging I operation;
(3) combining the lead-zinc roughing I concentrate and the lead-zinc roughing II concentrate obtained in the step (1) to obtain lead-zinc mixed rough concentrate, sequentially adding a combined inhibitor B, a combined collector A and pine oil into the lead-zinc mixed rough concentrate, performing flotation and tailing discarding to obtain lead-zinc mixed concentrate and a flotation and tailing discarding product, wherein the flotation and tailing discarding product is returned to size mixing and is merged into the lead-zinc roughing I operation;
(4) finely grinding the lead-zinc bulk concentrate obtained in the step (3) until the mass percentage content of the-45 mu m size fraction is more than 80%, adjusting the pulp until the mass percentage concentration of the pulp is 35%, sequentially adding a combined inhibitor C, a combined collector B and pine oil into the pulp, and performing zinc suppression and lead floating operation to obtain lead rough concentrate and zinc concentrate;
(5) sequentially adding a combined inhibitor C, a combined collector B and pine oil into the lead rough concentrate obtained in the step (4), and performing lead concentration I operation to obtain lead concentration I concentrate and lead concentration I tailings, wherein the lead concentration I tailings are returned to size mixing and merged into zinc suppression lead flotation operation; and (2) sequentially adding a combined inhibitor C, a combined collector B and the pinitol oil into the lead concentration I concentrate to perform lead concentration II operation to obtain lead concentrate and lead concentration II tailings, wherein the lead concentration II tailings are returned to size mixing and merged into the lead concentration I operation.
2. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: adding 800-1600 g of lime, 1000-2000 g of combined inhibitor A, 200-400 g of copper-ammonia complex, 400-800 g of combined collector A and 40-60 g of pine oil into the ore pulp in the step (1) by each ton of lead-zinc sulfide ore containing the intergrowth; 400-800 g of lime, 500-1000 g of combined inhibitor A, 100-200 g of copper-ammonia complex, 200-400 g of combined collector A and 20-30 g of pine oil are added into the lead-zinc roughing I tailings.
3. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: adding 200-400 g of lime, 250-500 g of combined inhibitor A, 50-100 g of copper-ammonia complex, 100-200 g of combined collector A and 10-15 g of pine oil into each ton of intergrowth-containing lead-zinc sulfide tailings in the step (2); 100-200 g of lime, 125-250 g of combined inhibitor A and 50-100 g of combined collector A are added into the tailings I of lead-zinc scavenging.
4. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: and (3) adding 600-1000 g of combined inhibitor B, 100-200 g of combined collector A and 20-30 g of pine oil into each ton of intergrowth-containing lead-zinc sulfide ore in the lead-zinc mixed rough concentrate in the step (3).
5. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: and (3) adding 1500-2500 g of combined inhibitor C, 200-400 g of combined collector B and 30-50 g of pine oil into the ore pulp obtained in the step (4) by each ton of the symbiont-containing lead-zinc sulfide ore.
6. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: and (2) adding 750-1250 g of combined inhibitor C, 100-200 g of combined collector B and 15-25 g of pine oil into each ton of intergrowth-containing lead zinc sulfide ore in the step (5), and adding 375-625 g of combined inhibitor C, 50-100 g of combined collector B and 15-25 g of pine oil into lead concentrate I.
7. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: the combined inhibitor A comprises water glass, carboxymethyl cellulose and sodium tripolyphosphate, wherein the mass ratio of the water glass to the carboxymethyl cellulose to the sodium tripolyphosphate is 2:2: 1; the combined collector A comprises butyl xanthate, ethidium nitrate and butyl ammonium blackant, wherein the mass ratio of the butyl xanthate to the ethidium nitrate to the butyl ammonium blackant is 5:4: 1.
8. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: the preparation method of the copper ammonia complex comprises the following steps:
1) stirring and leaching the high-purity copper oxide minerals by adopting strong ammonia water to obtain a copper ammonia complex solution;
2) and (3) placing the copper ammonia complex solution obtained in the step 1) in an ethanol solution for crystallization for multiple times to obtain the copper ammonia complex of the activator.
9. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: the combined inhibitor B comprises water glass, sodium tripolyphosphate and sodium humate, wherein the mass ratio of the water glass to the sodium tripolyphosphate to the sodium humate is 4:3: 3; the combined collector B comprises ethyl xanthate and ethyl sulfur nitrogen, wherein the mass ratio of the ethyl xanthate to the ethyl sulfur nitrogen is 2: 3.
10. The consortium-containing lead-zinc sulfide ore flotation separation method according to claim 1, wherein: the combined inhibitor C comprises zinc sulfate, sodium sulfite and sodium sulfide, wherein the mass ratio of the zinc sulfate to the sodium sulfite to the sodium sulfide is 5:3: 2.
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