CN110420760B - Beneficiation and recovery method of silver copper ore - Google Patents
Beneficiation and recovery method of silver copper ore Download PDFInfo
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- CN110420760B CN110420760B CN201910660897.3A CN201910660897A CN110420760B CN 110420760 B CN110420760 B CN 110420760B CN 201910660897 A CN201910660897 A CN 201910660897A CN 110420760 B CN110420760 B CN 110420760B
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- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000011084 recovery Methods 0.000 title claims abstract description 58
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 title claims abstract description 28
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 145
- 229910052709 silver Inorganic materials 0.000 claims abstract description 144
- 239000004332 silver Substances 0.000 claims abstract description 144
- 239000012141 concentrate Substances 0.000 claims abstract description 127
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 claims abstract description 60
- 239000010949 copper Substances 0.000 claims abstract description 60
- 238000002386 leaching Methods 0.000 claims abstract description 35
- 238000007667 floating Methods 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 93
- 230000002000 scavenging effect Effects 0.000 claims description 90
- 238000005188 flotation Methods 0.000 claims description 45
- 238000000926 separation method Methods 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 12
- 238000010408 sweeping Methods 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 6
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical compound CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 4
- AEOCXXJPGCBFJA-UHFFFAOYSA-N ethionamide Chemical compound CCC1=CC(C(N)=S)=CC=N1 AEOCXXJPGCBFJA-UHFFFAOYSA-N 0.000 claims description 4
- 229960002001 ethionamide Drugs 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 235000017550 sodium carbonate Nutrition 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- QTANTQQOYSUMLC-UHFFFAOYSA-O Ethidium cation Chemical compound C12=CC(N)=CC=C2C2=CC=C(N)C=C2[N+](CC)=C1C1=CC=CC=C1 QTANTQQOYSUMLC-UHFFFAOYSA-O 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 3
- 239000001760 fusel oil Substances 0.000 claims description 3
- RLJMLMKIBZAXJO-UHFFFAOYSA-N lead nitrate Chemical compound [O-][N+](=O)O[Pb]O[N+]([O-])=O RLJMLMKIBZAXJO-UHFFFAOYSA-N 0.000 claims description 3
- QWENMOXLTHDKDL-UHFFFAOYSA-N pentoxymethanedithioic acid Chemical compound CCCCCOC(S)=S QWENMOXLTHDKDL-UHFFFAOYSA-N 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 3
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001648 tannin Substances 0.000 claims description 3
- 229920001864 tannin Polymers 0.000 claims description 3
- 235000018553 tannin Nutrition 0.000 claims description 3
- 239000012991 xanthate Substances 0.000 claims description 3
- 229910001739 silver mineral Inorganic materials 0.000 abstract description 36
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000003112 inhibitor Substances 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 4
- 239000012190 activator Substances 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 21
- 239000011707 mineral Substances 0.000 description 21
- 235000010755 mineral Nutrition 0.000 description 21
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 20
- 229910052725 zinc Inorganic materials 0.000 description 20
- 239000011701 zinc Substances 0.000 description 20
- 238000011160 research Methods 0.000 description 12
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 7
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 7
- 239000005751 Copper oxide Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 235000011941 Tilia x europaea Nutrition 0.000 description 7
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 description 7
- 229910000431 copper oxide Inorganic materials 0.000 description 7
- 239000004571 lime Substances 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 229910001779 copper mineral Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- PPUARQXOOBRUNI-UHFFFAOYSA-N [S--].[S--].[S--].[Cu++].[Zn++].[Pb++] Chemical compound [S--].[S--].[S--].[Cu++].[Zn++].[Pb++] PPUARQXOOBRUNI-UHFFFAOYSA-N 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005272 metallurgy Methods 0.000 description 4
- -1 mirror making Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- DDXFRAKUEHJUDK-UHFFFAOYSA-N [Sb]=S.[Cu].[Ag] Chemical compound [Sb]=S.[Cu].[Ag] DDXFRAKUEHJUDK-UHFFFAOYSA-N 0.000 description 3
- HJCRDHDDIDLLGZ-UHFFFAOYSA-N [Zn].[Ag].[Pb] Chemical compound [Zn].[Ag].[Pb] HJCRDHDDIDLLGZ-UHFFFAOYSA-N 0.000 description 3
- 239000008396 flotation agent Substances 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- 229910052969 tetrahedrite Inorganic materials 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 229910001656 zinc mineral Inorganic materials 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- YCKOAAUKSGOOJH-UHFFFAOYSA-N copper silver Chemical compound [Cu].[Ag].[Ag] YCKOAAUKSGOOJH-UHFFFAOYSA-N 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- LWUVWAREOOAHDW-UHFFFAOYSA-N lead silver Chemical compound [Ag].[Pb] LWUVWAREOOAHDW-UHFFFAOYSA-N 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- PGWMQVQLSMAHHO-UHFFFAOYSA-N sulfanylidenesilver Chemical compound [Ag]=S PGWMQVQLSMAHHO-UHFFFAOYSA-N 0.000 description 2
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 2
- 239000011135 tin Substances 0.000 description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 description 2
- VIQXJBJZCTWMKO-UHFFFAOYSA-N C(C=C=C)(=O)[O-].[NH4+] Chemical compound C(C=C=C)(=O)[O-].[NH4+] VIQXJBJZCTWMKO-UHFFFAOYSA-N 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- WIKSRXFQIZQFEH-UHFFFAOYSA-N [Cu].[Pb] Chemical compound [Cu].[Pb] WIKSRXFQIZQFEH-UHFFFAOYSA-N 0.000 description 1
- KYYKWNCRORCFJS-UHFFFAOYSA-N [Cu].[Pb].[Ag] Chemical compound [Cu].[Pb].[Ag] KYYKWNCRORCFJS-UHFFFAOYSA-N 0.000 description 1
- UXNBTDLSBQFMEH-UHFFFAOYSA-N [Cu].[Zn].[Pb] Chemical compound [Cu].[Zn].[Pb] UXNBTDLSBQFMEH-UHFFFAOYSA-N 0.000 description 1
- 229910052946 acanthite Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- YNTQKXBRXYIAHM-UHFFFAOYSA-N azanium;butanoate Chemical compound [NH4+].CCCC([O-])=O YNTQKXBRXYIAHM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 1
- 229940056910 silver sulfide Drugs 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052959 stibnite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- IHBMMJGTJFPEQY-UHFFFAOYSA-N sulfanylidene(sulfanylidenestibanylsulfanyl)stibane Chemical compound S=[Sb]S[Sb]=S IHBMMJGTJFPEQY-UHFFFAOYSA-N 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/10—Hydrochloric acid, other halogenated acids or salts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/025—Precious metal ores
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- 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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- Geochemistry & Mineralogy (AREA)
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Abstract
The invention relates to a beneficiation and recovery method of a silver copper ore. The beneficiation recovery method comprises the following steps: firstly, grinding ore until the ore is-0.074 mm and accounts for 60% -85%, floating independent silver mineral with better floatability by adopting a high-selectivity regulator and a collector to the ground ore product to obtain silver concentrate 1 and floating silver tailings, adding an activator, an inhibitor and a strong collector to the floating silver tailings for floating, intensively recovering independent silver mineral with poorer floatability and carrier silver mineral to obtain silver-rich copper concentrate and floating tailings, and performing acid leaching on the silver-rich copper concentrate to obtain copper-containing leaching solution and silver concentrate 2 (leaching slag). The method has the advantages of strong adaptability, high grade of the obtained silver concentrate, high silver recovery rate and the like, and is suitable for recovering silver from the silver-copper ore and comprehensively recovering copper.
Description
Technical Field
The invention relates to a mineral processing technology, in particular to a beneficiation and recovery method of silver copper ore.
Technical Field
Silver is a precious metal, and its electrical and thermal conductivity is the highest among all metals, and is used to fabricate extremely sensitive physical instrument elements, various automation devices, rockets, submarines, computers, nuclear devices, and communication systems, and a large number of contact points in all of these devices are made of silver. Pure silver is a beautiful silver metal and has good ductility, so that a lot of silver ornaments are available. In addition, silver is widely used in the fields of photosensitive materials, medicines, mirror making, glass coloring, and the like. More than 70% of silver in China is produced from copper-lead-zinc ore deposits, the silver is produced in an associated form basically, and independent silver ores are rare, so that research on the independent silver ores is few, and mineral separation and recovery of the independent silver ores are rare.
For the beneficiation of silver ores, some research has been conducted by scientists.
The invention discloses a mineral separation method for silver guide recovery in a copper-lead-zinc sulfide ore separation process, and a Chinese patent with the application number of CN201611169464.0 discloses a mineral separation method for silver guide recovery in a copper-lead-zinc sulfide ore separation process. The method specifically comprises the steps of raw ore selection, ore grinding, copper-lead-silver mixed flotation, copper-silver mixed flotation, lead-silver mixed flotation, zinc-sulfur mixed flotation and zinc-sulfur separation, further optimizes the adjusting agent and the collecting agent, and finally obtains copper-silver concentrate, lead-silver concentrate, zinc concentrate and sulfur concentrate respectively. The method disclosed by the patent has the advantages that the separation effect of the copper-lead-zinc sulfide ore is good, the silver recovery rate in the copper-lead concentrate is greatly improved, the comprehensive utilization rate of silver resources of mine enterprises is greatly improved, and the economic benefit is obvious. However, this patent emphasizes the separation of the copper-lead-zinc sulphide ores from each other and directs the silver to concentrate on copper concentrate and lead concentrate rather than on the beneficiation recovery of separate silver ores.
The invention discloses a beneficiation method for recovering silver, copper, sulfur and tin from tin-silver symbiotic polymetallic ore, and a Chinese patent with application number of CN201611110249.3 discloses the following steps: adding medicine into raw ore, grinding and mixing the raw ore, preferentially floating silver in a weakly alkaline medium to obtain high-grade silver concentrate, mixing the raw ore, floating sulfur in a weakly acidic medium to obtain sulfur concentrate, grading, reselecting a coarse grain part to recover cassiterite, desliming a fine grain part, floating sulfur, and then floating cassiterite to obtain tin concentrate. The method has the advantages of comprehensive recovery of valuable elements in the tin-silver symbiotic polymetallic ores, simple and reasonable separation process flow, low cost, high index, small occupied area and contribution to industrialization. However, the patent emphasizes the comprehensive recovery of silver, copper, sulfur and tin in the tin-silver co-polymetallic ore, the independent silver mineral in the silver-tin co-occurrence ore is not introduced, and the research emphasis is not the ore dressing recovery of the independent silver ore.
Ramarie et al (mineral separation process experimental research on certain low-grade associated silver-lead-zinc polymetallic ore [ J)]And an article published in gold science and technology 2018.02, 212-217) aims at the problems of low grading index, unreasonable medicament system and the like of certain low-grade associated silver-lead-zinc polymetallic sulphide ore, a series of laboratory mineral separation condition tests are developed on the basis of analyzing the composition of raw ore and ore property ore preparation, and the preferential flotation process of zinc-inhibiting lead flotation is determined. A combined agent consisting of ammonium butyrate black drug and butyl xanthate according to the proportion of 1:1 is used as a lead collecting agent, and Na is added2S is sulfur inducer, CaO and Na2CO3ZnSO as an inhibitor for pyrite and magnetite4And CuSO4Respectively as zinc inhibitor and activator, and butyl xanthate as zinc collectorAnd (3) preparing. Through a flotation closed circuit test of two-coarse three-fine three-sweep, the lead grade of the lead concentrate is 60.29%, the recovery rate is 92.02%, and the lead content is 826.13 x 10-6The recovery rate of silver is 72.75%; the zinc grade of the zinc concentrate is 48.32%, the recovery rate is 92.30%, the recovery rate of silver is 61.71 x 10 < -6 >, and the recovery rate of silver is 19.19%, which indicates that the flotation index of the process is good, and the process has guiding significance for sorting the ores. However, the research object of the article is the mineral separation recovery of associated silver-lead-zinc polymetallic ores, not independent silver ores.
Luoxianping (New process research for improving associated silver dressing index of certain lead-zinc ore [ J)]And mining and metallurgy engineering 2011,03:35-40) uses CaCl to improve the mineral dressing index of associated silver of certain lead-zinc ore2+ LY-05 combination as an inhibitor of pyrite, ZnSO4As an inhibitor of zinc minerals, the ethidium-nitrogen and ammonium butadienoate are used as a collector of lead minerals, and a zinc-inhibiting lead flotation priority flotation process is adopted under the condition of a lower pH value of ore pulp to realize lead-zinc separation and recover silver minerals in the lead-zinc separation as much as possible. The test result shows that the new process can lead the lead grade in the lead concentrate product to reach 65.15 percent, the recovery rate is 60.29 percent, the silver grade reaches 3200g/t, and the recovery rate is 44.09 percent, compared with the original process, the lead recovery rate is improved by 3.26 percent, the silver recovery rate is improved by 31.98 percent, the zinc grade in the zinc concentrate product reaches 58.25 percent, the recovery rate is 83.65 percent, the silver grade reaches 230g/t, and the recovery rate is 30.97 percent, compared with the original process, the zinc recovery rate is improved by 5.40 percent, and the silver recovery rate is improved by 12.05 percent. Compared with the prior art, the new process not only greatly improves the recovery rate of silver, but also improves the quality and the recovery rate of lead and zinc concentrate. However, the research object of the article is the separation of lead and zinc in lead-zinc ores and the comprehensive recovery of associated silver, but not the ore dressing recovery of independent silver ores.
The article of Yangbei and the like (improving the mineral separation index of certain lead-zinc associated silver ore research [ J ] < mineral protection and utilization > < 2012.06: 25-27)' is researched aiming at certain lead-zinc silver ore, in order to improve the mineral separation index of certain lead-zinc silver ore, a combined inhibitor (sodium carbonate + zinc sulfate) is provided for inhibiting zinc and lead floating under the condition of low alkali, ethionamide is taken as a lead mineral collecting agent, copper sulfate is taken as an activating agent of a zinc mineral in lead separation tailings, butyl xanthate is taken as a zinc mineral collecting agent, the comprehensive recovery of lead, zinc and silver can be realized, lead concentrate containing 66.37% of lead, 2612.50g/t of silver and 3.73% of zinc can be obtained in the test, and the recovery rates of lead and silver are respectively 87.31% and 81.45%; the zinc concentrate contains 52.77 percent of zinc, 131.27g/t of silver and 0.95 percent of lead, and the recovery rates of the zinc and the silver are respectively 90.57 percent and 8.07 percent; the total recovery rate of silver in lead and zinc concentrate is up to 89.52%. Compared with the prior art, the recovery rate of lead is improved by 5.25 percent; the recovery rate of silver in lead concentrate is improved by 10.02 percent. However, the research object of the article is still the separation of lead and zinc in lead-zinc ores and the comprehensive recovery of associated silver, but not the ore dressing recovery of independent silver ores.
Therefore, the development of a method for recovering the independent silver minerals aiming at the silver-copper ores has important research significance and economic value.
Disclosure of Invention
The invention aims to overcome the defect of the prior art that the method for recovering the independent silver minerals from the silver copper ores is lacked, and provides a method for separating and recovering the silver copper ores. The method combines the special properties of the independent silver ores, adopts the combined process flow of subsection step-by-step selection and metallurgy, and realizes the good recovery of the main metal element silver and the associated element copper in the independent silver ores. Firstly, according to the characteristic that the floatability of the independent silver mineral is relatively good, but the independent silver mineral is sensitive to the pH value of the ore pulp, especially very sensitive to lime, the combination of two or more regulators is specially adopted to adjust the pH value of the ore pulp, the addition of the lime is avoided, the floatability of the independent silver mineral is maintained and improved, and the silver concentrate 1 taking the independent silver mineral as the main body is obtained by preferential flotation; secondly, combining the characteristics that the carrier silver mineral is mainly copper mineral and is oxidized to form copper oxide, and adopting a plurality of regulators and collectors to combine and intensively recover the carrier silver mineral to obtain silver-rich copper concentrate; according to the characteristic that the carrier mineral of the silver is a copper oxide mineral, acid leaching is adopted to leach the copper aiming at the silver-rich copper concentrate, so that the silver is separated from the copper, and a copper-containing leaching solution and a silver concentrate 2 (leaching residue) are obtained, so that the grade of the silver concentrate is ensured, the recovery rate of the silver is obviously improved, and the copper associated in the ore is recovered.
In order to realize the purpose of the invention, the invention adopts the following scheme:
the beneficiation and recovery method of the silver copper ore comprises the following steps:
s1: grinding raw ore to-0.074 mm, wherein the raw ore accounts for 60-85%;
s2: mixing the product subjected to the ore grinding in the S1 pulp until the concentration of the ore pulp is 20-35%, adding a regulator and a collecting agent, stirring, and performing rough concentration to obtain rough concentrate and rough tailings; the addition amount of the conditioning agent in the rough concentration is 500-3000 g/t; the adding amount of the collecting agent in the rough separation is 30-100 g/t;
adding a collecting agent into the rougher tailings for primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings; adding a collecting agent into the primary scavenging tailings to perform secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; the adding amount of the collecting agent in the primary sweeping is 5-30 g/t; the adding amount of the collecting agent in the secondary sweeping is 3-20 g/t;
adding a regulator into the roughed concentrate for primary and secondary fine separation to obtain silver concentrate 1 and floating silver tailings; the adding amount of the regulator in the selection is 100-1000 g/t;
the middlings of each stage obtained in the processes of rough concentration, primary scavenging, secondary scavenging and fine concentration are sequentially returned to the upper stage to form closed cycle;
s2, in the roughing and concentrating procedures, the conditioning agents are independently selected from at least two of sodium carbonate, water glass, tannin or carboxymethyl cellulose; the collecting agents in the S2 rough concentration, primary scavenging and secondary scavenging processes are independently selected from at least two of Z200, butyl ammonium black powder, 25# black powder or ethidium and nitrogen;
s3: adding a regulator and a collector into the flotation silver tailings, stirring, and performing rough concentration to obtain rough concentrate and rough tailings; the addition amount of the regulator in the rough concentration is 1000-2500 g/t; the adding amount of the collecting agent in the rough separation is 100-500 g/t;
adding a collecting agent into the roughed tailings to perform primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings; adding a collecting agent into the primary scavenging tailings to perform secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; the adding amount of the collecting agent in the primary sweeping is 30-100 g/t; the adding amount of the collecting agent in the secondary sweeping is 30-100 g/t;
adding a collecting agent into the rough concentration concentrate, and carrying out two to three times of fine concentration to obtain silver-copper-rich concentrate and flotation tailings; the adding amount of the collecting agent in the fine selection is 20-100 g/t;
the middlings of each stage obtained in the processes of rough concentration, primary scavenging, secondary scavenging and fine concentration are sequentially returned to the upper stage to form closed cycle;
the conditioning agent in the S3 roughing flow is independently selected from at least two of copper sulfate, lead nitrate or sodium sulfide; s2 the collecting agent in the rough concentration, the first scavenging, the second scavenging and the concentration process is independently selected from at least two of butylammonium black powder, 25# black powder, ethionamide, butyl xanthate, amyl xanthate or mixed base xanthate synthesized by fusel oil;
s4: adding a copper leaching agent into the silver-rich copper concentrate, and stirring and leaching to obtain leached silver-rich copper concentrate;
s5: and carrying out solid-liquid separation on the leached silver-copper-rich concentrate to obtain a copper-containing leaching solution and a silver concentrate 2.
The research object of the invention is silver ore, which contains independent silver mineral and silver with copper mineral as carrier.
The research finds that the silver copper ore has the following special properties: (1) the cassiterite is easy to be crushed; (2) independent silver mineral flotation is particularly sensitive to pulp pH, especially very sensitive to lime; (3) the carrier silver mineral is mainly a copper mineral and has been oxidized to form copper oxide.
The method combines the special properties of the independent silver ores, adopts the combined process flow of subsection step-by-step selection and metallurgy, and realizes the good recovery of the main metal element silver and the associated element copper in the independent silver ores. Firstly, according to the characteristic that the floatability of the independent silver mineral is relatively good, but the independent silver mineral is sensitive to the pH value of the ore pulp, especially very sensitive to lime, the combination of two or more regulators is specially adopted to adjust the pH value of the ore pulp, the addition of the lime is avoided, the floatability of the independent silver mineral is maintained and improved, and the silver concentrate 1 taking the independent silver mineral as the main body is obtained by preferential flotation; secondly, combining the characteristics that the carrier silver mineral is mainly copper mineral and is oxidized to form copper oxide, and adopting a plurality of regulators and collectors to combine and intensively recover the carrier silver mineral to obtain silver-rich copper concentrate; according to the characteristic that the carrier mineral of the silver is a copper oxide mineral, acid leaching is adopted to leach the copper aiming at the silver-rich copper concentrate, so that the silver is separated from the copper, and a copper-containing leaching solution and a silver concentrate 2 (leaching residue) are obtained, so that the grade of the silver concentrate is ensured, the recovery rate of the silver is obviously improved, and the copper associated in the ore is recovered.
The method has the advantages of strong adaptability, high grade of the obtained silver concentrate, high silver recovery rate and the like, and is suitable for recovering silver from the silver-copper ore and comprehensively recovering copper.
Preferably, the ore is ground in S1 using a mill.
Preferably, the roughing process of S2 is: adding a regulator, and stirring for 3-5 min; and adding a collecting agent, stirring for 2-4 minutes, and performing rough separation.
Preferably, the addition amount of the regulator in the rough concentration of S2 is 1300-2200 g/t.
Preferably, the adding amount of the collecting agent in the roughing in the S2 is 50-60 g/t.
Preferably, the adding amount of the collecting agent in the one-time sweeping of S2 is 15-20 g/t.
Preferably, the adding amount of the collecting agent in the secondary sweeping of S2 is 8-11 g/t.
Preferably, the addition amount of the regulator in the selection of S2 is 230-600 g/t.
Preferably, the conditioning agents in the roughing and concentrating processes in S2 are independently selected from 2-3 of sodium carbonate, water glass, tannin or carboxymethyl cellulose.
Preferably, the collecting agent in the rough concentration, primary scavenging and secondary scavenging processes of S2 is 2-3 of Z200, butyl ammonium black powder, 25# black powder or ethidium and nitrogen.
Preferably, the roughing process of S3 is: adding a regulator, and stirring for 2-5 min; and adding a collecting agent, stirring for 2-4 minutes, and performing rough separation.
Preferably, the addition amount of the regulator in the rough concentration of S3 is 1300-2200 g/t.
Preferably, the adding amount of the collecting agent in the roughing in the S3 is 240-340 g/t.
Preferably, the adding amount of the collecting agent in the one-time sweeping of S3 is 55-70 g/t.
Preferably, the adding amount of the collecting agent in the secondary sweeping of S3 is 35-60 g/t.
Preferably, the adding amount of the collecting agent in the concentration of S3 is 52-60 g/t.
Preferably, the modifier in the S3 roughing flow is 2-3 of copper sulfate, lead nitrate or sodium sulfide.
Preferably, the collecting agent in the S3 roughing, primary scavenging, secondary scavenging and concentrating processes is independently selected from 2-3 kinds of butyl ammonium black powder, 25# black powder, ethionamide, butyl xanthate, amyl xanthate or mixed base xanthate synthesized by fusel oil.
Copper leaching agents conventional in the art may be used in the present invention, also in conventional amounts.
Preferably, the copper leaching agent in S4 is one or more of sulfuric acid or hydrochloric acid.
Preferably, the adding amount of the copper leaching agent in S4 is 5-50 kg/t.
Compared with the prior art, the invention has the following beneficial effects:
the method combines the special properties of the independent silver ores, adopts the combined process flow of subsection step-by-step selection and metallurgy, and realizes the good recovery of the main metal element silver and the associated element copper in the independent silver ores.
(1) According to the characteristic that the floatability of the independent silver minerals is relatively good, but the independent silver minerals are sensitive to the pH value of the ore pulp, especially very sensitive to lime, the combination of two or more regulators is specially adopted to adjust the pH value of the ore pulp, the addition of the lime is avoided, the floatability of the independent silver minerals is maintained and improved, and the silver concentrate 1 mainly comprising the independent silver minerals is obtained by preferential flotation;
(2) combining the characteristics that the carrier silver mineral is mainly copper mineral and is oxidized to form copper oxide, and adopting a plurality of regulators and collectors to combine and strengthen the recovery of the carrier silver mineral to obtain silver-rich copper concentrate;
(3) according to the characteristic that the carrier mineral of silver is a copper oxide mineral, aiming at the silver-rich copper concentrate, the copper is leached by acid leaching, so that the silver is separated from the copper, and a copper-containing leaching solution and a silver concentrate 2 (leaching residue) are obtained, thereby ensuring the grade of the silver concentrate, remarkably improving the recovery rate of the silver, and simultaneously recovering the copper associated in the ore.
The method has the advantages of strong adaptability, high grade of the obtained silver concentrate, high silver recovery rate and the like, and is suitable for recovering silver from the silver-copper ore and comprehensively recovering copper.
Drawings
FIG. 1 is a schematic process flow diagram provided in example 1.
Detailed Description
The invention is further illustrated by the following examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention. Experimental procedures without specific conditions noted in the examples below, generally according to conditions conventional in the art or as suggested by the manufacturer; the raw materials, reagents and the like used are, unless otherwise specified, those commercially available from the conventional markets and the like. Any insubstantial changes and substitutions made by those skilled in the art based on the present invention are intended to be covered by the claims.
Example 1
The embodiment provides a beneficiation and recovery method of a silver copper ore, and the process is as follows, as shown in figure 1.
The feeding ore is an independent silver ore in Africa.
(1) Independent silver mineral (including spiral sulfur silver ore, sulfur antimony copper silver ore, sulfur antimony lead silver ore and the like) flotation: grinding raw ore to-0.074 mm, wherein the ore accounts for 65%, adding water into the ground product, mixing the mixture to reach the concentration of ore pulp of 30%, sequentially adding a regulator, stirring for 3 minutes, stirring a collecting agent for 2 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a regulator into the rough concentration concentrate to carry out secondary concentration; obtaining silver concentrate 1 and floating silver tailings; the middlings of each stage obtained in the flotation process (namely roughing, primary scavenging, secondary scavenging and fine concentration, the same below) are sequentially returned to the upper stage to form closed cycle.
(2) Flotation of carrier silver minerals: adding a regulator into the flotation silver tailings, stirring for 3 minutes, stirring a collecting agent for 2 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a collecting agent into the rough concentration concentrate to carry out tertiary concentration; obtaining silver-rich copper concentrate and flotation tailings; and returning all levels of middlings obtained in the flotation process to the previous level to form closed cycle. Concentrating and pulping the silver-rich copper concentrate until the concentration of the pulp is 35%, adding 12kg/t of sulfuric acid according to the weight of the raw ore, and leaching for 90 minutes to obtain leached silver-rich copper concentrate; and (3) carrying out solid-liquid separation on the leached silver-copper-rich concentrate to obtain a copper-containing leaching solution and a silver concentrate 2 (leaching residue). The flotation reagent system is shown in table 1, and the obtained indexes are shown in table 2.
Example 2
The embodiment provides a beneficiation and recovery method of a silver copper ore, and the process is as follows.
The feeding ore is silver-tin paragenic ore in some places in Yunnan province.
(1) Independent silver minerals (including silver tetrahedrite, spiral sulfur silver ore, stibnite, sulfur antimony copper silver ore, sulfur antimony lead silver ore and the like) are floated: grinding raw ore to 85% of-0.074 mm, adding water into the ground product, mixing the mixture to 25% of pulp concentration, sequentially adding a regulator, stirring for 4 minutes, stirring a collecting agent for 2 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a regulator into the rough concentration concentrate to carry out primary concentration; obtaining silver concentrate 1 and floating silver tailings; and returning all levels of middlings obtained in the flotation process to the previous level to form closed cycle.
(2) Flotation of carrier silver minerals: adding a regulator into the flotation silver tailings, stirring for 2 minutes, stirring a collecting agent for 2 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a collecting agent into the rough concentration concentrate for twice fine concentration; obtaining silver-rich copper concentrate and flotation tailings; and returning all levels of middlings obtained in the flotation process to the previous level to form closed cycle. Concentrating and pulping the silver-rich copper concentrate until the concentration of the pulp is 30%, adding 5kg/t of sulfuric acid according to the weight of the raw ore, and leaching for 150 minutes to obtain leached silver-rich copper concentrate; and (3) carrying out solid-liquid separation on the leached silver-copper-rich concentrate to obtain a copper-containing leaching solution and a silver concentrate 2 (leaching residue). The flotation reagent system is shown in table 1, and the obtained indexes are shown in table 2.
Example 3
The embodiment provides a beneficiation and recovery method of a silver copper ore, and the process is as follows.
The ore feeding is silver-tin paragenic ore in Tibet
(1) Independent silver minerals (including silver tetrahedrite, sulfur antimony copper silver ore, sulfur antimony lead silver ore and the like) are floated: grinding raw ore until the ore with the diameter of-0.074 mm accounts for 75%, adding water into the ground product, mixing the mixture until the concentration of the ore pulp is 20%, sequentially adding a regulator, stirring for 3 minutes, stirring a collecting agent for 2 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a regulator into the rough concentration concentrate to carry out secondary concentration; obtaining silver concentrate 1 and floating silver tailings; and returning all levels of middlings obtained in the flotation process to the previous level to form closed cycle.
(2) Flotation of carrier silver minerals: adding a regulator into the flotation silver tailings, stirring for 2 minutes, stirring a collecting agent for 3 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a collecting agent into the rough concentration concentrate to carry out tertiary concentration; obtaining silver-rich copper concentrate and flotation tailings; and returning all levels of middlings obtained in the flotation process to the previous level to form closed cycle. Concentrating and pulp-mixing the silver-rich copper concentrate until the concentration of the pulp is 45%, adding 50kg/t of hydrochloric acid according to the weight of the raw ore, and leaching for 60 minutes to obtain leached silver-rich copper concentrate; and (3) carrying out solid-liquid separation on the leached silver-copper-rich concentrate to obtain a copper-containing leaching solution and a silver concentrate 2 (leaching residue). The flotation reagent system is shown in table 1, and the obtained indexes are shown in table 2.
Example 4
The embodiment provides a beneficiation and recovery method of a silver copper ore, and the process is as follows.
The mineral is silver-tin paragenetic mineral of Xinjiang
(1) Independent silver minerals (including silver tetrahedrite, spiroid silver sulfide ore and the like) are floated: grinding raw ore to 60% of-0.074 mm, adding water into the ground product, mixing the mixture to 35% of pulp concentration, sequentially adding a regulator, stirring for 5 minutes, stirring a collecting agent for 2 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a regulator into the rough concentration concentrate to carry out secondary concentration; obtaining silver concentrate 1 and floating silver tailings; and returning all levels of middlings obtained in the flotation process to the previous level to form closed cycle.
(2) Flotation of carrier silver minerals: adding a regulator into the flotation silver tailings, stirring for 2 minutes, stirring a collecting agent for 2 minutes, and performing roughing to obtain roughed concentrate and roughed tailings; adding a collecting agent into the roughed tailings, and performing primary scavenging to obtain primary scavenged concentrate and primary scavenged tailings; adding a collecting agent into the primary scavenging tailings, and performing secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; adding a collecting agent into the rough concentration concentrate to carry out secondary concentration; obtaining silver-rich copper concentrate and flotation tailings; and returning all levels of middlings obtained in the flotation process to the previous level to form closed cycle. Concentrating and pulping the silver-rich copper concentrate until the concentration of the pulp is 35%, adding 8kg/t of sulfuric acid according to the weight of the raw ore, and leaching for 120 minutes to obtain leached silver-rich copper concentrate; and (3) carrying out solid-liquid separation on the leached silver-copper-rich concentrate to obtain a copper-containing leaching solution and a silver concentrate 2 (leaching residue). The flotation reagent system is shown in table 1, and the obtained indexes are shown in table 2.
Comparative example 1
This comparative example provides a process for the beneficiation and recovery of a silver copper ore, which is the same as example 1 in the feeding and the steps, and differs in the system of the flotation agent (see table 1).
Comparative example 2
This comparative example provides a process for the beneficiation and recovery of a silver copper ore, which is the same as example 1 in the feeding and the steps, and differs in the system of the flotation agent (see table 1).
TABLE 1 flotation agent dosage for examples 1-4 and comparative examples 1-2
TABLE 2 test results (. about.g/t) of examples 1 to 4 and comparative examples 1 to 2
Therefore, the silver concentrate obtained by the method provided by the embodiments of the invention has high grade and high comprehensive recovery rate of silver, and is suitable for comprehensively recovering silver and copper from silver-copper paragenic ores. The flotation adopts a combined collecting agent and a regulator, so that a 'synergistic effect' can be generated, and the flotation effect is better than that of one collecting agent and one regulator.
While the foregoing is directed to particular example embodiments of the present invention, numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present invention. Rather, the scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The beneficiation and recovery method of the silver copper ore is characterized by comprising the following steps:
s1: grinding raw ore to-0.074 mm, wherein the raw ore accounts for 60-85%;
s2: mixing the product subjected to the ore grinding in the S1 pulp until the concentration of the ore pulp is 20-35%, adding a regulator and a collecting agent, stirring, and performing rough concentration to obtain rough concentrate and rough tailings; s2, the addition amount of the conditioning agent in the rough concentration is 1300-2200 g/t; s2, adding 50-60 g/t of collecting agent in the rough separation;
adding a collecting agent into the rougher tailings for primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings; adding a collecting agent into the primary scavenging tailings to perform secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; s2, adding 15-20 g/t of collecting agent in the primary sweeping; s2, adding the collecting agent in the secondary sweeping at 8-11 g/t;
adding a regulator into the roughed concentrate for primary and secondary fine separation to obtain silver concentrate 1 and floating silver tailings; s2, the adding amount of the regulator in the selection is 230-600 g/t;
the middlings of each stage obtained in the processes of rough concentration, primary scavenging, secondary scavenging and fine concentration are sequentially returned to the upper stage to form closed cycle;
s2, in the roughing and selecting process, the regulators are independently selected from 2-3 of sodium carbonate, water glass, tannin or carboxymethyl cellulose; s2, collecting agents in the rough concentration, primary scavenging and secondary scavenging processes are 2 of Z200, butyl ammonium black powder, 25# black powder or ethidium and nitrogen;
s3: adding a regulator and a collector into the flotation silver tailings, stirring, and performing rough concentration to obtain rough concentrate and rough tailings; the addition amount of the regulator in the rough concentration is 1000-2500 g/t; the adding amount of the collecting agent in the rough separation is 100-500 g/t;
adding a collecting agent into the roughed tailings to perform primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings; adding a collecting agent into the primary scavenging tailings to perform secondary scavenging to obtain secondary scavenging concentrate and secondary scavenging tailings; s3, adding the collecting agent in the primary sweeping at 55-70 g/t; s3, adding 35-60 g/t of collecting agent in the secondary sweeping;
adding a collecting agent into the rough concentration concentrate, and carrying out two to three times of fine concentration to obtain silver-copper-rich concentrate and flotation tailings; s3, adding 52-60 g/t of collecting agent in the fine selection;
the middlings of each stage obtained in the processes of rough concentration, primary scavenging, secondary scavenging and fine concentration are sequentially returned to the upper stage to form closed cycle;
the conditioning agent in the S3 roughing flow is 2-3 of copper sulfate, lead nitrate or sodium sulfide; s3 the collecting agent in the rough concentration, the first scavenging, the second scavenging and the concentration process is independently selected from 2 of butyl ammonium black powder, 25# black powder, ethionamide, butyl xanthate, amyl xanthate or mixed base xanthate synthesized by fusel oil;
s4: adding a copper leaching agent into the silver-rich copper concentrate, and stirring and leaching to obtain leached silver-rich copper concentrate;
s5: and carrying out solid-liquid separation on the leached silver-copper-rich concentrate to obtain a copper-containing leaching solution and a silver concentrate 2.
2. The method of claim 1, wherein the grinding is performed by a mill in S1.
3. The method of claim 1, wherein the rough selection at S2 comprises: adding a regulator, and stirring for 3-5 min; and adding a collecting agent, stirring for 2-4 minutes, and performing rough separation.
4. The method of claim 1, wherein the rough selection at S3 comprises: adding a regulator, and stirring for 2-5 min; and adding a collecting agent, stirring for 2-4 minutes, and performing rough separation.
5. The method as claimed in claim 1, wherein the copper leaching agent in S4 is one or more of sulfuric acid or hydrochloric acid.
6. The method as claimed in claim 1, wherein the copper leaching agent is added in an amount of 5-50 kg/t in S4.
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