CN116510884A - Beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ore - Google Patents

Beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ore Download PDF

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CN116510884A
CN116510884A CN202310473439.5A CN202310473439A CN116510884A CN 116510884 A CN116510884 A CN 116510884A CN 202310473439 A CN202310473439 A CN 202310473439A CN 116510884 A CN116510884 A CN 116510884A
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concentrate
primary
copper
scavenging
tailings
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柯圣钊
胡建国
丘世澄
朱淼斌
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Jiangxi Copper Co Ltd
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Jiangxi Copper Co Ltd
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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
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • 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
    • 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
    • B03D1/004—Organic compounds
    • B03D1/008—Organic compounds containing oxygen
    • 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
    • B03D1/004—Organic compounds
    • B03D1/012—Organic compounds containing sulfur
    • 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
    • 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
    • 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
    • B03D2201/04—Frothers
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention relates to a beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ores, which comprises the following steps: ore grinding and pulp mixing, namely selecting copper by adopting a low-alkalinity inhibitor, roughing a first tank foam product to obtain copper concentrate I, and carrying out roughing, scavenging and refining on the ore pulp twice after the selection to obtain copper concentrate II; the copper tailings are subjected to secondary classification, primary classification sand setting is subjected to primary roughing, secondary scavenging and secondary concentration, wherein foam products of a first tank are selected as sulfur concentrate I, and other flotation tank products of the first tank are subjected to secondary concentration to obtain sulfur concentrate II; the secondary grading sand setting is subjected to primary roughing and secondary scavenging to obtain sulfur concentrate III, and secondary grading overflow is subjected to tail discarding in advance; after regrinding the sulfur concentrate 1-3, carrying out roughing and scavenging for one time to obtain copper concentrate III, wherein copper concentrates I and II are copper concentrates; the primary scavenger tailings are sulfur concentrate. The invention realizes the comprehensive recovery of valuable elements in the symbiotic polymetallic ore, has simple separation process flow, and enriches gold and silver into copper concentrate with high price coefficient.

Description

Beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ore
Technical Field
The invention relates to the technical field of mineral separation, in particular to a mineral separation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ores.
Background
At present, the recovery of associated gold and silver minerals from nonferrous metal mineral resources has taken an important role in gold and silver production, and the yield of the recovery of associated gold from nonferrous metal mineral resources is about 10% of the total yield of gold worldwide. The main problems existing in the recovery of associated gold and silver are as follows: (1) The dissociation degree of mineral monomers is not high, the bare gold and silver are few, and the coated gold and silver are most. Jin Yinqian cloth is uneven in granularity and is in irregular granular, flaky, deep round and emulsion drop shapes so as to wrap gold and silver and store the gold and silver among grains in a mineral body, and certain difficulty is brought to gold and silver recovery work. (2) The flotation process flow is simple and single, and the requirement on recovery of associated gold and silver cannot be met. (3) The flotation reagent system is difficult to meet the requirements for recovery of associated gold and silver. The types of gold and silver specific collectors used in the current production are not many, and the capability of adapting to ores is not strong. Copper and sulfur separation mainly uses lime as an inhibitor, and a method of firstly vulcanizing and then floating is adopted for floating copper oxide minerals, so that recovery of gold and silver is influenced. (4) The flotation equipment is aged and behind, and the requirement of recovering gold and silver can not be met. (5) Some of the deposited minerals containing gold and silver cannot be recovered in time, so that gold and silver are lost. The gold and silver-containing sedimentary minerals are divided into two types, one is sedimentary ore sand, and the other is mostly in an ore grinding loop, such as a classifier tank, a sand return tank, a ball mill and the like; the other is calcium-forming substances such as foam tanks, pulp pipes and the like. If the gold-silver-containing sediment cannot be recovered in time, part of coarse-grain gold and silver can be lost in tailings. (6) The recovery work of the lost gold and silver in the byproducts and the tailing products is not known enough, and no necessary measures are taken, so that the overall recovery rate of gold and silver is not high. (7) In the economic contractual operation, enterprises only pay attention to the examination of copper indexes, and neglect the examination of gold and silver production indexes. The reagent system and the process conditions in the ore dressing production only need to meet the copper dressing requirement, but the requirement of gold and silver recovery is not considered, so that gold and silver cannot be fully recovered.
Disclosure of Invention
The invention discloses a beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ores, which aims to solve any one of the above and other potential problems in the prior art.
In order to solve the problems, the technical scheme of the invention is as follows: a beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ores specifically comprises the following steps:
s1) grinding copper and sulfur symbiotic polymetallic ore, pulping, adding a low-alkalinity inhibitor for copper flotation, adding a selective strong collector, directly roughing a first tank foam product into a high-grade copper concentrate I, and carrying out twice roughing, twice scavenging and three times concentration on the rest roughing flotation tank products to obtain a high-grade copper concentrate II;
s2) carrying out secondary classification on copper tailings, carrying out primary roughing, secondary scavenging and secondary concentration on primary classified sand setting, wherein the concentrate is directly discharged from a first concentrating tank to obtain sulfur concentrate I, and the foam products of the other first concentrating tanks are subjected to secondary concentration to obtain sulfur concentrate II;
s3) carrying out primary roughing and secondary scavenging on secondary grading sand setting, wherein a roughing foam product is sulfur concentrate III, and secondary grading overflow is subjected to tail discarding in advance; regrinding the obtained sulfur concentrate I, sulfur concentrate II and sulfur concentrate III, adding a collector with strong selectivity for one roughing and one scavenging to obtain low-grade copper concentrate III;
s4) combining the low-grade copper concentrate III obtained in the step S3) with the high-grade copper concentrate I and copper concentrate II to obtain copper concentrate; the primary scavenger tail is the final sulfur concentrate.
Further, the step S1) specifically comprises the following steps:
s1.1) grinding raw ore until the raw ore is 0.74mm to 60-70%, adding water and mixing pulp until the concentration is 33-39%;
s1.2) sequentially adding 60-100 g/ton of low alkalinity inhibitor, 30-60 g/ton of collector and 10-15 g/ton of foaming agent into ore pulp for primary roughing of copper to obtain high-grade copper concentrate I, and adding 8-15 g/ton of collector and 5-8 g/ton of foaming agent into tailings for secondary roughing of copper to obtain copper roughing concentrate and copper roughing tailing pulp;
s1.3) sequentially adding 5-8 g/ton of collector and 3-5 g/ton of foaming agent into the copper roughing tailing pulp for primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings; 200-300 g/ton lime is added at the stirring barrel of the copper roughing concentrate, and then three blank concentration is carried out to obtain high-grade copper concentrate II, and the high-grade copper concentrate II and the high-grade copper concentrate I are mixed to form high-grade copper concentrate; mixing the tailings and the primary scavenging concentrate, regrinding until the fineness is-0.074 mm and accounts for 90-95%, and returning to primary roughing of copper; and adding 3-5 g/ton of collector into the primary scavenging tailings in sequence to perform secondary scavenging to obtain secondary scavenging concentrate and copper flotation tailings, and returning the secondary scavenging concentrate to the primary scavenging.
Further, the grade of copper in the copper-sulfur symbiotic polymetallic ore is not lower than 0.650%, the grade of sulfur is not lower than 8.50%, and the grade of associated gold and silver is not lower than 0.35g/t and 10.00g/t.
Further, the components of the low alkalinity inhibitor include sodium hydroxide, sodium humate, calcium oxide, ammonium sulfate and calcium chloride mixture; the mass ratio of each component is as follows: 9:0.6:0.2:0.1:0.1;
the collector is ethionamide ester, and the foaming agent is terpineol oil.
Further, the specific steps of S2) are as follows:
s2.1) carrying out primary classification on copper flotation tailings by a cyclone to obtain primary classified overflow and primary classified sand setting; adding water into the primary classified sand setting, adjusting the concentration to 43% -48%, sequentially adding 30-40 g/ton of collector and 3-5 g/ton of foaming agent for sulfur coarse-grain roughing to obtain coarse-grain roughing concentrate and coarse-grain roughing tailings;
s2.2) adding 15-20 g/ton of collector and 1-3 g/ton of foaming agent into coarse-grain coarse-dressing tailings to perform coarse-grain primary scavenging to obtain coarse-grain primary scavenging middlings and coarse-grain primary scavenging tailings;
s2.3) carrying out primary blank concentration on the sulfur coarse-grain rough concentration concentrate, and directly forming a sulfur concentrate 1 by using a foam product of a first flotation machine; the rest primary concentrating foam products are primary concentrating concentrates, and the primary concentrating tailings and the primary coarse-grain scavenging tailings return to coarse-grain roughing;
s2.4) adding 5-10 g/ton of collector into the primary concentrate for secondary concentration to obtain sulfur concentrate II.
Further, the collector in S2) is butyl xanthate; the foaming agent is terpineol oil.
Further, the specific steps of S3) are as follows:
s3.1) returning the secondary concentrating tailings to primary concentration; adding 5-10 g/ton of collector into the coarse-grain primary scavenging tailings to perform coarse-grain secondary scavenging to obtain coarse-grain secondary scavenging middlings and coarse-grain secondary scavenging tailings, namely tailings 1;
s3.2) carrying out primary scavenging operation from coarse-grain secondary scavenging middlings to coarse-grain primary scavenging; the primary grading overflow flows through a cyclone for secondary grading to obtain secondary grading sand setting and secondary grading overflow, namely tailings III;
s3.3) adding water into the secondary classified sand setting, adjusting the concentration to 32% -40%, sequentially adding 25-30 g/ton of collector and 2-4 g/ton of foaming agent for rough concentration of sulfur fine particles to obtain sulfur concentrate II, and mixing the sulfur concentrate II and sulfur concentrate I into sulfur concentrate;
s3.4) adding 10-15 g/ton of collector into the fine-grain rough tailings for primary scavenging to obtain fine-grain primary scavenging middlings and fine-grain primary scavenging tailings; adding 5-8 g/ton of collector into the fine-grained primary scavenging tailings to perform secondary scavenging to obtain fine-grained secondary scavenging middlings and fine-grained secondary scavenging tailings, namely tailings II; the ore selecting sequence of each level of fine particle sweeping returns to the upper level operation; combining the first tailings, the second tailings and the secondary grading overflow into total tailings;
s3.5) regrinding the sulfur concentrate obtained in the step S3.3) until the sulfur concentrate is minus 0.74mm accounting for 90-95%; sequentially adding 10-20 g/ton of low-alkalinity inhibitor, 5-10 g/ton of collector and 1-3 g/ton of foaming agent for one-time roughing to obtain low-grade copper concentrate three and roughing tailings; the roughing tailings are sequentially added with 1-3 g/ton of collector for primary scavenging, the primary scavenging tailings return to roughing, and the primary scavenging tailings are high-sulfur concentrate.
Further, the collector in the S3.5) is sodium alkyl ether alcohol sulfate; the foaming agent is terpineol oil.
Further, the grade of the copper concentrate recovered by the beneficiation method is more than 22.00%, the copper recovery rate is more than 90.00%, and the gold and silver recovery rates are respectively more than 65% and 78%, and are mainly enriched into the copper concentrate with high valuation coefficient; the grade of the sulfur concentrate is more than 45.00%, and the sulfur recovery rate is more than 80.00%.
The beneficial effects of the invention are as follows: by adopting the technical scheme, the beneficiation method adopts the low-alkalinity inhibitor to float out high-grade copper concentrate in the weak alkaline medium preferentially, and the coarse first tank directly discharges the concentrate to realize early recovery and recovery, so that the circulation quantity of middlings is reduced, and the gold recovery rate in the copper concentrate reaches 40%;2. the foam product of the first flotation machine for sulfur coarse grain concentration is directly formed into sulfur concentrate, which is beneficial to improving sulfur recovery rate; 3. the ore dressing is carried out under the condition of coarser granularity, so that the excessive crushing of the ore is avoided, the recovery rate of copper and sulfide is high, and the cost is low; 4. the sulfur concentrate is regrind and recleaning, and a collecting agent with high selectivity is adopted, so that part of gold and silver are recovered and mixed into the copper concentrate, the gold pricing coefficient is improved, the copper recovery rate is improved, the flow is simple, and the index is high.
Drawings
FIG. 1 is a flow chart of a beneficiation method for recovering valuable metals from high-grade copper-sulfur symbiotic polymetallic ores.
Detailed Description
For a better understanding of the present invention, the following examples are set forth to illustrate the present invention, but are not to be construed as limiting the present invention.
As shown in fig. 1, the beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ores comprises the following steps:
s1) grinding and pulping copper and sulfur symbiotic polymetallic ore, adding a low-alkalinity inhibitor for copper flotation, directly roughing a first tank foam product into high-grade copper concentrate I, and carrying out twice roughing, twice scavenging and three times concentration on the rest roughing flotation tank products to obtain high-grade copper concentrate II;
s2) carrying out secondary classification on copper tailings, carrying out primary roughing, secondary scavenging and secondary concentration on primary classified sand setting, wherein a first concentrating tank directly produces concentrate to obtain sulfur concentrate I, and a remaining first concentrating flotation tank carries out secondary concentration to obtain sulfur concentrate II;
s3) carrying out primary roughing and secondary scavenging on the secondary classified sand setting to obtain sulfur concentrate III, and carrying out secondary classified overflow and pre-tailing discarding; regrinding the sulfur concentrate I, the sulfur concentrate II and the sulfur concentrate III, adding a collector with strong selectivity for primary roughing and primary scavenging to obtain low-grade copper concentrate III;
s4) merging the low-grade copper concentrate III obtained in the step S3) with the high-grade copper concentrate I and the copper concentrate II into copper concentrate; the primary scavenger tail is the final sulfur concentrate.
The S1) comprises the following specific steps:
s1.1) grinding raw ore until the raw ore is 0.74mm to 60-70%, adding water and mixing pulp until the concentration is 33-39%;
s1.2) sequentially adding 60-100 g/ton of low alkalinity inhibitor, 30-60 g/ton of collector and 10-15 g/ton of foaming agent into ore pulp for primary roughing of copper to obtain high-grade copper concentrate I, and adding 8-15 g/ton of collector and 5-8 g/ton of foaming agent into tailings for secondary roughing of copper to obtain copper roughing concentrate and copper roughing tailing pulp;
s1.3) sequentially adding 5-8 g/ton of collector and 3-5 g/ton of foaming agent into the copper roughing tailing pulp for primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings; 200-300 g/ton lime is added at the stirring barrel of the copper roughing concentrate, and then three blank concentration is carried out to obtain a high-grade copper concentrate II, and the high-grade copper concentrate II and the high-grade copper concentrate I are mixed to form a high-grade copper concentrate; mixing the tailings and the primary scavenging concentrate, regrinding until the fineness is-0.074 mm and accounts for 90-95%, and returning to primary roughing of copper; and adding 3-5 g/ton of collector into the primary scavenging tailings in sequence to perform secondary scavenging to obtain secondary scavenging concentrate and copper flotation tailings, and returning the secondary scavenging concentrate to the primary scavenging.
The components of the low alkalinity inhibitor comprise sodium hydroxide, sodium humate, calcium oxide, ammonium sulfate and calcium chloride mixture; the mass ratio of each component is as follows: 9:0.6:0.2:0.1:0.1;
the collector is ethionamide ester, and the foaming agent is terpineol oil.
The specific steps of S2) are as follows:
s2.1) carrying out primary classification on copper flotation tailings by a cyclone to obtain primary classified overflow and primary classified sand setting; adding water into the primary classified sand setting, adjusting the concentration to 43% -48%, sequentially adding 30-40 g/ton of collector and 3-5 g/ton of foaming agent for sulfur coarse-grain roughing to obtain coarse-grain roughing concentrate and coarse-grain roughing tailings;
s2.2) adding 15-20 g/ton of collector and 1-3 g/ton of foaming agent into coarse-grain coarse-dressing tailings to perform coarse-grain primary scavenging to obtain coarse-grain primary scavenging middlings and coarse-grain primary scavenging tailings;
s2.3) carrying out primary blank concentration on the sulfur coarse-grain rough concentration concentrate, and directly forming a first sulfur concentrate by using a foam product of a first flotation machine; the rest primary concentrating foam products are primary concentrating concentrates, and the primary concentrating tailings and the primary coarse-grain scavenging tailings return to coarse-grain roughing;
s2.4) adding 5-10 g/ton of collecting agent butyl xanthate into the primary concentrate for secondary concentration to obtain sulfur concentrate 2.
The collecting agent in the S2) is butyl xanthate; the foaming agent is terpineol oil.
The specific steps of the S3) are as follows:
s3.1) returning the secondary concentrating tailings to primary concentration; adding 5-10 g/ton of collector into the coarse-grain primary scavenging tailings to perform coarse-grain secondary scavenging to obtain coarse-grain secondary scavenging middlings and coarse-grain secondary scavenging tailings, namely tailings I;
s3.2) carrying out primary scavenging operation from coarse-grain secondary scavenging middlings to coarse-grain primary scavenging; the primary grading overflow flows through a cyclone for secondary grading to obtain secondary grading sand setting and secondary grading overflow, namely tailings III;
s3.3) adding water into the secondary classified sand setting, adjusting the concentration to 32% -40%, sequentially adding 25-30 g/ton of collector and 2-4 g/ton of foaming agent for rough concentration of sulfur fine particles to obtain sulfur concentrate II, and mixing the sulfur concentrate II and sulfur concentrate I into sulfur concentrate;
s3.4) adding 10-15 g/ton of collector into the fine-grain rough tailings for primary scavenging to obtain fine-grain primary scavenging middlings and fine-grain primary scavenging tailings; adding 5-8 g/ton of collector into the fine-grained primary scavenging tailings to perform secondary scavenging to obtain fine-grained secondary scavenging middlings and fine-grained secondary scavenging tailings, namely tailings II; the ore selecting sequence of each level of fine particle sweeping returns to the upper level operation; combining the first tailings, the second tailings and the secondary grading overflow into total tailings;
s3.5) regrinding the sulfur concentrate obtained in the step S3.3) until the sulfur concentrate is minus 0.74mm accounting for 90-95%; sequentially adding 10-20 g/ton of low-alkalinity inhibitor, 5-10 g/ton of collector and 1-3 g/ton of foaming agent for one-time roughing to obtain low-grade copper concentrate three and roughing tailings; the roughing tailings are sequentially added with 1-3 g/ton of collector for primary scavenging, the primary scavenging tailings return to roughing, and the primary scavenging tailings are high-sulfur concentrate.
The collector is sodium alkyl ether alcohol sulfate.
The grade of the copper concentrate of the beneficiation method is more than 22.00%, the copper recovery rate is more than 90.00%, and the gold and silver recovery rates are respectively more than 65% and 78%, and are mainly enriched into the copper concentrate with high price coefficient; the grade of the sulfur concentrate is more than 45.00%, and the sulfur recovery rate is more than 80.00%.
Examples:
implementing the following steps: copper and sulfur symbiotic polymetallic ores in a certain place in Jiangxi, wherein copper ores in the ores are mainly chalcopyrite, and small amounts of tetrahedrite, bornite and blue chalcocite are additionally arranged; other metal minerals are mainly pyrite and pyrite, and other small amounts of limonite and magnetite; the nonmetallic minerals are mainly lime garnet, quartz, calcite and dolomite, and secondly lime garnet, chlorite, kaolinite, potassium feldspar, plagioclase, diopside and the like. The average grades of main valuable elements of copper, sulfur, gold and silver in the ore are 0.71%, 10.86%, 0.37g/t and 12.49g/t.
Grinding raw ore until the raw ore accounts for 65 percent below zero (mm), adding 75 g/ton of inhibitor, 50 g/ton of ethyl thiourethane and 12 g/ton of pine pollen oil for copper primary roughing, and obtaining high-grade copper concentrate 1 (the yield is 0.50 percent, the copper grade is 23.00 percent, the copper recovery rate is 16.20 percent, jin Pinwei 5.35.35 g/t, the gold recovery rate is 7.23 percent, the silver grade is 225.89g/t and the silver recovery rate is 10.77 percent) in a first roughing tank. Adding 10 g/ton of ethionine and 6 g/ton of foaming agent for secondary copper roughing, wherein the residual copper primary roughing and the copper secondary roughing foam product are copper roughing concentrates, and the copper secondary roughing tailings are copper roughing tailings; 200 g/ton lime is added at a copper roughing concentrate stirring barrel, and three blank concentration is carried out to obtain high-grade copper concentrate II (yield 2.05%, copper grade 24.50%, copper recovery rate 70.74%, jin Pinwei 5.88.88 g/t, gold recovery rate 32.58%, silver grade 248.64g/t and silver recovery rate 48.59%). Adding 5 g/ton of ethyl thiourethane and 3 g/ton of pine alcohol oil into ore pulp of copper roughing tailings for primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings, regrinding the primary scavenging concentrate and primary scavenging tailings to the fineness of-0.074 mm accounting for 98%, and returning to primary roughing. And sequentially adding 2 g/ton of ethionamide into the primary scavenging tailings to perform secondary scavenging to obtain secondary scavenging concentrate and copper flotation tailings, and returning the secondary scavenging concentrate to the primary scavenging. And carrying out primary classification on copper flotation tailings by using a cyclone to obtain primary classified overflow and primary classified sand setting. Adding water into the primary classified sand setting, adjusting the concentration to 43% -48%, sequentially adding 30 g/ton of butyl xanthate and 5 g/ton of foaming agent (pine oil) for sulfur coarse grain roughing, and obtaining coarse grain roughing concentrate and coarse grain roughing tailings; adding 15 g/ton of collector and 2 g/ton of foaming agent into coarse-grain coarse-dressing tailings to perform coarse-grain primary scavenging to obtain coarse-grain primary scavenging middlings and coarse-grain primary scavenging tailings; the sulfur coarse grain roughing concentrate is subjected to primary blank concentration, and the foam product of the first flotation machine is directly formed into sulfur concentrate I (yield 4.84%, sulfur grade 44.87%, sulfur recovery rate 20.00%, jin Pinwei 0.57.57 g/t, gold recovery rate 7.46%, silver grade 13.66g/t and silver recovery rate 5.29%); the rest primary concentrating foam products are primary concentrating concentrates, and the primary concentrating tailings and the primary coarse-grain scavenging tailings return to coarse-grain roughing; adding 6 g/ton of collecting agent butyl xanthate into the primary concentrate for secondary concentration to obtain sulfur concentrate II (yield 9.77%, sulfur grade 45.89%, sulfur recovery 41.28%, jin Pinwei 0.55.55 g/t, gold recovery 14.52%, silver grade 12.87g/t and silver recovery 10.07%), and returning the secondary tailings to primary concentration; adding 2 g/ton butyl xanthate into coarse-grain primary scavenging tailings to perform coarse-grain secondary scavenging to obtain coarse-grain secondary scavenging middlings and coarse-grain secondary scavenging tailings (tailings I); performing primary scavenging operation from middling secondary scavenging to coarse-grained primary scavenging; the primary grading overflow flows through a cyclone for secondary grading to obtain secondary grading overflow (tailings III) and secondary grading sand setting; adding water into the secondary classified sand setting, regulating the concentration to 32% -40%, sequentially adding 25 g/ton butyl xanthate and 3 g/ton pine oil for rough concentration of sulfur fine particles to obtain sulfur concentrate three (yield 5.32%, sulfur grade 44.78%, sulfur recovery rate 21.94%, jin Pinwei 0.42.42 g/t, gold recovery rate 6.04%, silver grade 11.20g/t and silver recovery rate 4.77%), and mixing with sulfur concentrate I to obtain sulfur concentrate; adding 15 g/ton butyl xanthate into the fine-grain roughing tailings for primary scavenging to obtain fine-grain primary scavenging middlings and fine-grain primary scavenging tailings; adding 5 g/ton of collector into the fine-grain primary scavenging tailings to perform secondary scavenging, so as to obtain fine-grain secondary scavenging middlings and fine-grain secondary scavenging tailings (second tailings); the ore selecting sequence of each level of fine particle sweeping returns to the upper level operation; and combining the first tailings, the second tailings and the secondary grading overflow into total tailings.
Regrinding sulfur concentrate until the sulfur concentrate accounts for 95% of minus 0.74 mm; sequentially adding 15 g/ton of inhibitor (sodium hydroxide, sodium humate, calcium oxide, ammonium sulfate and calcium chloride mixture), 15 g/ton of collector (sodium alkyl ether alcohol sulfate) and 2 g/ton of foaming agent (pine oil) for one roughing to obtain low-grade copper concentrate three (yield 0.36%, copper grade 6.50%, copper recovery rate 3.30%, jin Pinwei 1.49.49 g/t, gold recovery rate 1.45%, silver grade 66.88g/t and silver recovery rate 2.30%) and roughing tailings; adding 3 g/ton of sodium alkyl ether alcohol sulfate into the roughing tailings in sequence to perform primary scavenging, returning the primary scavenging tailings to the roughing, wherein the primary scavenging tailings are high-sulfur concentrate (the yield is 19.57%, the sulfur grade is 45.53%, the sulfur recovery rate is 82.04%, the gold recovery rate is 26.57%, the silver grade is 8.59g/t and the silver recovery rate is 17.83%); the low-grade copper concentrate III and the high-grade copper concentrate I and the copper concentrate II are mixed into copper concentrate (the yield is 2.91%, the copper grade is 22.02%, the copper recovery rate is 90.23%, the Jin Pinwei 5.25.25 g/t, the gold recovery rate is 41.26%, the silver grade is 222.25g/t, the silver recovery rate is 61.65%), and the associated gold and silver recovery rates respectively reach 67.83% and 79.49%.
And II, implementation: the grade of copper and sulfur of a certain copper-sulfur symbiotic polymetallic ore is 0.750%, the grade of sulfur is 9.00%, and the grade of associated gold and silver is 0.51g/t and 15.33g/t.
Grinding raw ore until the raw ore is 60% of-0.74 mm, and carrying out a medicament system, wherein the process flows of twice roughing, three scavenging and three concentrating are adopted, namely, refining the first tailings, scavenging the first concentrate, scavenging the third concentrate middling regrinding are adopted, the first groove foam product of roughing is copper concentrate I, and the refined third foam product is copper concentrate II. Classifying copper tailings by a cyclone, wherein the primary classifying cyclone sand setting adopts the processes of primary roughing, tertiary scavenging and secondary concentration, and the foam product of the first tank of the first concentrate is sulfur concentrate I and the foam product of the second concentrate is sulfur concentrate II; the primary grading overflow adopts primary roughing, secondary scavenging and secondary concentration to obtain sulfur concentrate II. Grinding the sulfur concentrate I and the sulfur concentrate II to the diameter of-0.074 mm accounting for 90 percent by a regrinding machine, obtaining copper concentrate III by one roughing and one scavenging, wherein scavenging tailings are sulfur concentrate, and the copper concentrate I, the copper concentrate II and the copper concentrate III are combined into copper concentrate.
Copper concentrate copper grade 23.50%, copper recovery 91.00%, gold recovery 43.50%, silver recovery 65.05%; sulfur concentrate sulfur grade 45.00%, sulfur recovery 85.00%, gold recovery 27.00%, silver recovery 19.50%.
The mineral separation method for recovering valuable metals from the symbiotic polymetallic ore provided by the embodiment of the application is described in detail. The above description of embodiments is only for aiding in understanding the method of the present application and its core ideas; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As referred to throughout the specification and claims, the terms "comprising," including, "and" includes "are intended to be interpreted as" including/comprising, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect. The description hereinafter sets forth the preferred embodiment for carrying out the present application, but is not intended to limit the scope of the present application in general, for the purpose of illustrating the general principles of the present application. The scope of the present application is defined by the appended claims.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that this application is not limited to the forms disclosed herein, but is not to be construed as an exclusive use of other embodiments, and is capable of many other combinations, modifications and environments, and adaptations within the scope of the teachings described herein, through the foregoing teachings or through the knowledge or skills of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims (10)

1. A beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ores is characterized by comprising the following steps of:
s1) grinding copper and sulfur symbiotic polymetallic ore, pulping, adding a low-alkalinity inhibitor for copper flotation, adding a selective strong collector, directly roughing a first tank foam product into a high-grade copper concentrate I, and carrying out twice roughing, twice scavenging and three times concentration on the rest roughing flotation tank products to obtain a high-grade copper concentrate II;
s2) carrying out secondary classification on copper tailings, carrying out primary roughing, secondary scavenging and secondary concentration on primary classified sand setting, wherein the concentrate is directly discharged from a first concentrating tank to obtain sulfur concentrate I, and the foam products of the other first concentrating tanks are subjected to secondary concentration to obtain sulfur concentrate II;
s3) carrying out primary roughing and secondary scavenging on secondary grading sand setting, wherein a roughing foam product is sulfur concentrate III, and secondary grading overflow is subjected to tail discarding in advance; regrinding the obtained sulfur concentrate I, sulfur concentrate II and sulfur concentrate III, adding a collector with strong selectivity for one roughing and one scavenging to obtain low-grade copper concentrate III;
s4) combining the low-grade copper concentrate III obtained in the step S3) with the high-grade copper concentrate I and copper concentrate II to obtain copper concentrate; the primary scavenger tail is the final sulfur concentrate.
2. The beneficiation process according to claim 1, wherein the S1) comprises the specific steps of:
s1.1) grinding raw ore into ore pulp with a certain particle size, and then adding water to adjust the concentration of the ore pulp;
s1.2) sequentially adding 60-100 g/ton of low alkalinity inhibitor, 30-60 g/ton of collector and 10-15 g/ton of foaming agent into ore pulp for primary roughing of copper to obtain high-grade copper concentrate I, and adding 8-15 g/ton of collector and 5-8 g/ton of foaming agent into tailings for secondary roughing of copper to obtain copper roughing concentrate and copper roughing tailing pulp;
s1.3) sequentially adding 5-8 g/ton of collector and 3-5 g/ton of foaming agent into the copper roughing tailing pulp for primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings; 200-300 g/ton lime is added at the stirring barrel of the copper roughing concentrate, and then three blank concentration is carried out to obtain a high-grade copper concentrate II, and the high-grade copper concentrate II and the high-grade copper concentrate I are mixed to form a high-grade copper concentrate; mixing the tailings and the primary scavenging concentrate, regrinding until the fineness is-0.074 mm and accounts for 90-95%, and returning to primary roughing of copper; and adding 3-5 g/ton of collector into the primary scavenging tailings in sequence to perform secondary scavenging to obtain secondary scavenging concentrate and copper flotation tailings, and returning the secondary scavenging concentrate to the primary scavenging.
3. The beneficiation method according to claim 2, wherein the grade of copper in the copper-sulfur symbiotic polymetallic ore is not lower than 0.650%, the grade of sulfur is not lower than 8.50%, and the grade of associated gold and silver is not lower than 0.35g/t and 10.00g/t.
4. The beneficiation method according to claim 2, wherein the particle size of the ore pulp after the ore grinding is-0.74 mm accounting for 60-70%; the concentration of the ore pulp is 33-39%.
5. A beneficiation process according to claim 2, wherein the components of the low alkalinity inhibitor comprise sodium hydroxide, sodium humate, calcium oxide, ammonium sulphate and calcium chloride mixtures; the mass ratio of each component is as follows: 9:0.6:0.2:0.1:0.1;
the collector is ethionamide ester, and the foaming agent is terpineol oil.
6. The beneficiation process according to claim 1, wherein the specific step of S2) is:
s2.1) carrying out primary classification on copper flotation tailings by a cyclone to obtain primary classified overflow and primary classified sand setting; adding water into the primary classified sand setting, adjusting the concentration to 43% -48%, sequentially adding 30-40 g/ton of collector and 3-5 g/ton of foaming agent for sulfur coarse-grain roughing to obtain coarse-grain roughing concentrate and coarse-grain roughing tailings;
s2.2) adding 15-20 g/ton of collector and 1-3 g/ton of foaming agent into coarse-grain coarse-dressing tailings to perform coarse-grain primary scavenging to obtain coarse-grain primary scavenging middlings and coarse-grain primary scavenging tailings;
s2.3) carrying out primary blank concentration on the sulfur coarse-grain rough concentration concentrate, and directly forming a first sulfur concentrate by using a foam product of a first flotation machine; the rest primary concentrating foam products are primary concentrating concentrates, and the primary concentrating tailings and the primary coarse-grain scavenging tailings return to coarse-grain roughing;
s2.4) adding 5-10 g/ton of collecting agent butyl xanthate into the primary concentrate for secondary concentration to obtain sulfur concentrate 2.
7. The beneficiation process according to claim 6, wherein the collector in S2) is butyl xanthate; the foaming agent is terpineol oil.
8. The beneficiation process according to claim 1, wherein the specific step of S3) is:
s3.1) returning the secondary concentrating tailings to primary concentration; adding 5-10 g/ton of collector into the coarse-grain primary scavenging tailings to perform coarse-grain secondary scavenging to obtain coarse-grain secondary scavenging middlings and coarse-grain secondary scavenging tailings, namely tailings I;
s3.2) carrying out primary scavenging operation from coarse-grain secondary scavenging middlings to coarse-grain primary scavenging; the primary grading overflow flows through a cyclone for secondary grading to obtain secondary grading sand setting and secondary grading overflow, namely tailings III;
s3.3) adding water into the secondary classified sand setting, adjusting the concentration to 32% -40%, sequentially adding 25-30 g/ton of collector and 2-4 g/ton of foaming agent for rough concentration of sulfur fine particles to obtain sulfur concentrate II, and mixing the sulfur concentrate II and sulfur concentrate I into sulfur concentrate;
s3.4) adding 10-15 g/ton of collector into the fine-grain rough tailings for primary scavenging to obtain fine-grain primary scavenging middlings and fine-grain primary scavenging tailings; adding 5-8 g/ton of collector into the fine-grained primary scavenging tailings to perform secondary scavenging to obtain fine-grained secondary scavenging middlings and fine-grained secondary scavenging tailings, namely tailings II; the ore selecting sequence of each level of fine particle sweeping returns to the upper level operation; combining the first tailings, the second tailings and the secondary grading overflow into total tailings;
s3.5) regrinding the sulfur concentrate obtained in the step S3.3) until the sulfur concentrate is minus 0.74mm accounting for 90-95%; sequentially adding 10-20 g/ton of low-alkalinity inhibitor, 5-10 g/ton of collector and 1-3 g/ton of foaming agent for one roughing to obtain low-grade copper concentrate 3 and roughing tailings; the roughing tailings are sequentially added with 1-3 g/ton of collector for primary scavenging, the primary scavenging tailings return to roughing, and the primary scavenging tailings are high-sulfur concentrate.
9. The beneficiation process according to claim 8, wherein the collector in S3.5) is sodium alkyl ether alkoxide sulfate; the foaming agent is terpineol oil.
10. The beneficiation method according to claim 1, wherein the grade of the copper concentrate recovered by the beneficiation method is more than 22.00%, the copper recovery rate is more than 90.00%, the gold recovery rate and the silver recovery rate are respectively more than 65% and 78%, and the gold recovery rate and the silver recovery rate are mainly enriched in the copper concentrate with high valuation coefficient; the grade of the sulfur concentrate is more than 45.00%, and the sulfur recovery rate is more than 80.00%.
CN202310473439.5A 2023-04-27 2023-04-27 Beneficiation method for recovering valuable metals from high-grade copper and sulfur symbiotic polymetallic ore Pending CN116510884A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116921068A (en) * 2023-09-18 2023-10-24 北京科技大学 Collector composition and method for concentrating copper ore containing fine-grained copper, gold and silver by using same
CN117772423A (en) * 2024-02-27 2024-03-29 矿冶科技集团有限公司 Copper-sulfur flotation separation combined inhibitor and method for copper-sulfur flotation by using same under lime-free condition

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116921068A (en) * 2023-09-18 2023-10-24 北京科技大学 Collector composition and method for concentrating copper ore containing fine-grained copper, gold and silver by using same
CN116921068B (en) * 2023-09-18 2024-01-16 北京科技大学 Collector composition and method for concentrating copper ore containing fine-grained copper, gold and silver by using same
CN117772423A (en) * 2024-02-27 2024-03-29 矿冶科技集团有限公司 Copper-sulfur flotation separation combined inhibitor and method for copper-sulfur flotation by using same under lime-free condition
CN117772423B (en) * 2024-02-27 2024-05-31 矿冶科技集团有限公司 Copper-sulfur flotation separation combined inhibitor and method for copper-sulfur flotation by using same under lime-free condition

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