CN111250270A - Poisonous sand combined inhibitor and beneficiation method for high-sulfur high-arsenic lead-zinc silver ore - Google Patents
Poisonous sand combined inhibitor and beneficiation method for high-sulfur high-arsenic lead-zinc silver ore Download PDFInfo
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- CN111250270A CN111250270A CN202010104260.9A CN202010104260A CN111250270A CN 111250270 A CN111250270 A CN 111250270A CN 202010104260 A CN202010104260 A CN 202010104260A CN 111250270 A CN111250270 A CN 111250270A
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- 239000003112 inhibitor Substances 0.000 title claims abstract description 83
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 56
- 239000004332 silver Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 41
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 231100000614 poison Toxicity 0.000 title claims description 5
- 230000007096 poisonous effect Effects 0.000 title claims description 5
- 239000004576 sand Substances 0.000 title claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title abstract description 23
- 229910052785 arsenic Inorganic materials 0.000 title abstract description 19
- 239000011593 sulfur Substances 0.000 title abstract description 19
- 229910052717 sulfur Inorganic materials 0.000 title abstract description 19
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 188
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 188
- 239000011701 zinc Substances 0.000 claims abstract description 188
- 230000002000 scavenging effect Effects 0.000 claims abstract description 125
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 claims abstract description 121
- 229910052964 arsenopyrite Inorganic materials 0.000 claims abstract description 121
- 239000012141 concentrate Substances 0.000 claims abstract description 105
- 238000005188 flotation Methods 0.000 claims abstract description 55
- 229910052952 pyrrhotite Inorganic materials 0.000 claims abstract description 46
- 238000007885 magnetic separation Methods 0.000 claims abstract description 39
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 13
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 13
- 239000004571 lime Substances 0.000 claims abstract description 13
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 11
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 11
- 239000011734 sodium Substances 0.000 claims abstract description 11
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 66
- 239000010665 pine oil Substances 0.000 claims description 48
- 235000010265 sodium sulphite Nutrition 0.000 claims description 33
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 33
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 32
- 229960001763 zinc sulfate Drugs 0.000 claims description 32
- 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 26
- RIZMRRKBZQXFOY-UHFFFAOYSA-N ethion Chemical compound CCOP(=S)(OCC)SCSP(=S)(OCC)OCC RIZMRRKBZQXFOY-UHFFFAOYSA-N 0.000 claims description 14
- 229910002651 NO3 Inorganic materials 0.000 claims description 9
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 9
- APYGBEXYIRZQJR-UHFFFAOYSA-N [N].C(C)[S] Chemical compound [N].C(C)[S] APYGBEXYIRZQJR-UHFFFAOYSA-N 0.000 claims description 6
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- GGLZPLKKBSSKCX-YFKPBYRVSA-N L-ethionine Chemical compound CCSCC[C@H](N)C(O)=O GGLZPLKKBSSKCX-YFKPBYRVSA-N 0.000 claims description 3
- 229910001739 silver mineral Inorganic materials 0.000 abstract description 10
- 238000000926 separation method Methods 0.000 abstract description 9
- 238000005456 ore beneficiation Methods 0.000 abstract description 7
- 239000011133 lead Substances 0.000 description 183
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- 238000011084 recovery Methods 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
- 235000010755 mineral Nutrition 0.000 description 8
- 239000006260 foam Substances 0.000 description 7
- 239000003513 alkali Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 239000006080 lead scavenger Substances 0.000 description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000001201 calcium accumulation Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229910001656 zinc mineral Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910001919 chlorite Inorganic materials 0.000 description 2
- 229910052619 chlorite group Inorganic materials 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000010436 fluorite Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 229910052949 galena Inorganic materials 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- 229910052627 muscovite Inorganic materials 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910052969 tetrahedrite Inorganic materials 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- HJCRDHDDIDLLGZ-UHFFFAOYSA-N [Zn].[Ag].[Pb] Chemical compound [Zn].[Ag].[Pb] HJCRDHDDIDLLGZ-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052626 biotite Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 1
- LMBWSYZSUOEYSN-UHFFFAOYSA-N diethyldithiocarbamic acid Chemical compound CCN(CC)C(S)=S LMBWSYZSUOEYSN-UHFFFAOYSA-N 0.000 description 1
- 229950004394 ditiocarb Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- AEOCXXJPGCBFJA-UHFFFAOYSA-N ethionamide Chemical compound CCC1=CC(C(N)=S)=CC=N1 AEOCXXJPGCBFJA-UHFFFAOYSA-N 0.000 description 1
- 229960002001 ethionamide Drugs 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229940001482 sodium sulfite Drugs 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 229940116411 terpineol Drugs 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- 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
- 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
- B03D2203/04—Non-sulfide ores
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a arsenopyrite combined inhibitor and a beneficiation method for high-sulfur high-arsenic lead-zinc silver ores, wherein the arsenopyrite combined inhibitor is formed by mixing lime, calcium hypochlorite and sodium humate in a mass ratio of 4.0-8.0: 2.0-4.0: 1.0-2.0. The lead-zinc-silver ore beneficiation method comprises the following steps: adding a arsenopyrite combined inhibitor into the raw ore pulp to perform lead roughing to obtain lead roughing concentrate and lead roughing tailings; performing lead scavenging on the lead roughing tailings at least once to obtain lead scavenging tailings; carrying out lead concentration on the lead roughing concentrate for at least one time to obtain lead concentrate; carrying out magnetic separation on the lead scavenging tailings to obtain magnetic separation tailings; concentrating and dehydrating the magnetic separation tailings to obtain concentrated ore pulp, and adding a arsenopyrite combined inhibitor into the concentrated ore pulp to perform zinc flotation to obtain zinc concentrate. The method can realize effective separation of the lead-zinc-silver minerals from the pyrrhotite and the arsenopyrite, and is simple, easy, efficient and environment-friendly.
Description
Technical Field
The invention relates to the technical field of lead-zinc ore beneficiation, in particular to a arsenopyrite combined inhibitor and a high-sulfur high-arsenic lead-zinc silver ore (the high-sulfur high-arsenic lead-zinc silver ore refers to a lead-zinc silver ore rich in pyrrhotite and arsenopyrite, and the lead-zinc silver ore has the mass percent of sulfur of more than 14.00% and the mass percent of arsenic of more than 2.50%).
Background
Along with the development and utilization of a large amount of mineral resources, the reserves of high-grade easily-recovered lead-zinc ores are continuously reduced, and the ore dressing and recovery of lead-zinc-silver polymetallic sulfide ores which are complex in ore structure, intergrowth, substitution or wrapping of the ores and poor in fineness and impurity and difficult to treat are more and more emphasized.
At present, the beneficiation and recovery method of lead-zinc sulfide ore mainly comprises the following steps: the method comprises a lead-zinc-sulfur preferential flotation method, a lead-zinc mixed flotation-lead-zinc separation-sulfur flotation method and a lead flotation-zinc-sulfur mixed flotation-zinc-sulfur separation method in sequence. For lead-zinc-silver polymetallic sulfide ores with high mineral content such as pyrrhotite and arsenopyrite, a mode of adding a large amount of lime to strengthen and inhibit pyrrhotite and arsenopyrite (namely a high-alkali method) is generally adopted to realize separation of lead-zinc-silver minerals and sulfur and arsenic minerals. The traditional high-alkali process for inhibiting sulfur and arsenic easily causes the problems of low recovery rate of associated gold and silver, sticky flotation foam, low concentrate grade, easy calcium accumulation and blockage of an ore pulp conveying pipeline and a filter and the like, and also easily causes the problem of standard exceeding of sulfur and arsenic in lead-zinc concentrate. Therefore, aiming at lead-zinc-silver polymetallic sulfide ores rich in pyrrhotite and arsenopyrite, an efficient, green and wide-applicability beneficiation method is urgently needed to be developed so as to realize effective separation of lead-zinc-silver minerals from pyrrhotite and arsenopyrite, improve the comprehensive utilization level of resources, increase the enterprise benefit and protect the ecological environment.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the arsenopyrite combined inhibitor and the lead-zinc-silver ore beneficiation method rich in pyrrhotite and arsenopyrite, which can realize the effective separation of the lead-zinc-silver ore from the pyrrhotite and the arsenopyrite, can effectively avoid the technical problems of low recovery rate of associated gold and silver, sticky flotation foam, low concentrate grade, easy calcium formation and blockage of an ore pulp conveying pipeline and a filter, excessive arsenic content of a lead-zinc concentrate product and the like easily caused by the traditional high-alkali method, are simple, easy, efficient and environment-friendly, are favorable for improving the comprehensive utilization level of resources, increase the enterprise benefit and protect the ecological environment.
The purpose of the invention is realized by the following technical scheme:
the poisonous sand combined inhibitor is prepared by mixing lime, calcium hypochlorite and sodium humate, wherein the mass ratio of the lime to the calcium hypochlorite is as follows: calcium hypochlorite: sodium humate is 4.0-8.0: 2.0-4.0: 1.0-2.0.
A lead-zinc-silver ore beneficiation method rich in pyrrhotite and arsenopyrite comprises the following steps:
step 1, preparing ore pulp: grinding the lead-zinc-silver ore raw ore rich in pyrrhotite and arsenopyrite to 75-85% of fineness of-0.074 mm, thereby obtaining raw ore pulp with the concentration of 30-40%;
step 2, lead flotation: adding 1000-1500 g/t of the arsenopyrite combined inhibitor, 1000-1500 g/t of zinc sulfate, 500-750 g/t of sodium sulfite, 30-50 g/t of ethion and 15-30 g/t of pine oil into the raw ore pulp, and performing lead roughing to obtain lead roughing concentrate and lead roughing tailings; adding 500-750 g/t of the arsenopyrite combined inhibitor, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethion and 5-15 g/t of pine oil into the lead roughing tailings, and performing at least one lead scavenging to obtain lead scavenging middlings and lead scavenging tailings; returning the lead scavenging middling sequence to the previous flotation operation; adding 500-750 g/t of the arsenopyrite combined inhibitor, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethion and 5-15 g/t of pine oil into the lead roughing concentrate to carry out at least one lead roughing so as to obtain lead roughing middlings and lead concentrate; returning the lead concentration middlings to the previous flotation operation in sequence;
step 3, magnetic separation: carrying out magnetic separation on the lead scavenging tailings under the magnetic induction intensity of 1500-3000 Oe, thereby obtaining magnetic separation concentrate and magnetic separation tailings;
step 4, dewatering magnetic separation tailings: concentrating and dehydrating the magnetic separation tailings to obtain concentrated ore pulp with the concentration of 30-40%;
step 5, zinc flotation: adding 1000-1500 g/t of the arsenopyrite combined inhibitor, 100-200 g/t of copper sulfate, 40-60 g/t of ethion and 15-30 g/t of pine oil into the concentrated ore pulp, and performing zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings; adding 500-750 g/t of the arsenopyrite combined inhibitor, 20-30 g/t of ethyl-sulfur-nitrogen and 5-15 g/t of pine oil into the zinc roughing tailings, and performing at least one zinc scavenging to obtain zinc scavenging middlings and zinc scavenging tailings; returning the zinc scavenging middling sequence to the previous flotation operation; adding 500-750 g/t of the arsenopyrite combined inhibitor into the zinc roughing concentrate, and performing zinc concentration for at least one time to obtain zinc concentration middlings and zinc concentrate; and returning the zinc concentration middlings to the previous flotation operation in sequence.
Preferably, in step 2, when two or more lead sweeps are performed, the arsenopyrite combination inhibitor, zinc sulphate, sodium sulphite, ethidium nitrate and pine oil are added only in the first lead sweep, and ethidium nitrate and pine oil are added only in the subsequent lead sweep.
Preferably, in step 2, when two or more lead beneficiations are performed, the foregoing arsenopyrite combination inhibitor, zinc sulfate, sodium sulfite, diethyldithiocarbamate and pine oil are added only in the first lead beneficiating, and the foregoing arsenopyrite combination inhibitor, zinc sulfate and sodium sulfite are added only in the subsequent lead beneficiating.
Preferably, in step 5, when two or more zinc sweeps are performed, the arsenopyrite combination inhibitor, ethidium and pine oil are added only in the first zinc sweep, and ethidium and pine oil are added only in the subsequent zinc sweeps.
Preferably, only the above-described arsenopyrite combination inhibitor is added at step 5 for each zinc beneficiation.
According to the technical scheme provided by the invention, the lime, the calcium hypochlorite and the sodium humate are mixed into the arsenopyrite combined inhibitor according to a specific proportion, and the specific processes of lead flotation, magnetic separation, concentration dehydration and zinc flotation are matched, so that the effective separation of lead-zinc-silver minerals, pyrrhotite and arsenopyrite can be realized, the lead, silver, zinc and sulfur minerals in the lead-zinc-silver polymetallic sulfide ore rich in pyrrhotite and arsenopyrite can be effectively recovered, the qualified lead concentrate and zinc concentrate products can be obtained, the beneficiation wastewater can be directly recycled, and the water resource is effectively saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a lead-zinc-silver ore beneficiation method rich in pyrrhotite and arsenopyrite in the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The arsenopyrite combined inhibitor and the beneficiation method of the high-sulfur high-arsenic lead-zinc silver ore (the high-sulfur high-arsenic lead-zinc silver ore refers to a lead-zinc silver ore rich in pyrrhotite and arsenopyrite, and the mass percent of sulfur in the lead-zinc silver ore is more than 14.00%, and the mass percent of arsenic in the lead-zinc silver ore is more than 2.50%) provided by the invention are described in detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The poisonous sand combined inhibitor is prepared by mixing lime, calcium hypochlorite and sodium humate, wherein the mass ratio of the lime to the calcium hypochlorite is as follows: calcium hypochlorite: sodium humate is 4.0-8.0: 2.0-4.0: 1.0-2.0.
As shown in fig. 1, a lead-zinc-silver ore beneficiation method rich in pyrrhotite and arsenopyrite can comprise the following steps:
step 1, preparing ore pulp: crushing the lead-zinc-silver ore raw ore rich in pyrrhotite and arsenopyrite, grinding the crushed raw ore until the fineness is-0.074 mm and the ground raw ore accounts for 75-85%, and determining the specific size fraction according to the properties of the ore, thereby obtaining the raw ore pulp with the solid-phase concentration of 30-40%.
Step 2, lead flotation: adding 1000-1500 g/t (the g/t in the document indicates the use amount of each ton of raw ore, for example, 1000-1500 g/t indicates the use amount of 1000-1500 g/ton of raw ore, and the description is omitted below) of the arsenopyrite combination inhibitor, 1000-1500 g/t of zinc sulfate, 500-750 g/t of sodium sulfite, 30-50 g/t of ethyl sulfur nitrogen, and 15-30 g/t of pine oil into the raw ore pulp, and performing lead roughing to obtain lead roughing concentrate and lead roughing tailings; adding 500-750 g/t of the arsenopyrite combined inhibitor, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethion and 5-15 g/t of pine oil into the lead roughing tailings, and performing at least one lead scavenging to obtain lead scavenging middlings and lead scavenging tailings; returning the lead scavenging middling sequence to the previous flotation operation; adding 500-750 g/t of the arsenopyrite combined inhibitor, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethion and 5-15 g/t of pine oil into the lead roughing concentrate to carry out at least one lead roughing so as to obtain lead roughing middlings and lead concentrate; and returning the lead concentration middlings to the previous flotation operation in sequence.
Step 3, magnetic separation: and carrying out magnetic separation on the lead scavenging tailings under the magnetic induction intensity of 1500-3000 Oe, so as to obtain magnetic separation concentrate (the magnetic separation concentrate is a magnetic product mainly comprising pyrrhotite) and magnetic separation tailings (the magnetic separation tailings are nonmagnetic minerals).
Step 4, dewatering magnetic separation tailings: and concentrating and dehydrating the magnetic separation tailings to obtain concentrated ore pulp with the concentration of 30-40%.
Step 5, zinc flotation: adding 1000-1500 g/t of the arsenopyrite combined inhibitor, 100-200 g/t of copper sulfate, 40-60 g/t of ethion and 15-30 g/t of pine oil into the concentrated ore pulp, and performing zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings; adding 500-750 g/t of the arsenopyrite combined inhibitor, 20-30 g/t of ethyl-sulfur-nitrogen and 5-15 g/t of pine oil into the zinc roughing tailings, and performing at least one zinc scavenging to obtain zinc scavenging middlings and zinc scavenging tailings; returning the zinc scavenging middling sequence to the previous flotation operation; adding 500-750 g/t of the arsenopyrite combined inhibitor into the zinc roughing concentrate, and performing zinc concentration for at least one time to obtain zinc concentration middlings and zinc concentrate; and returning the zinc concentration middlings to the previous flotation operation in sequence.
Specifically, the beneficiation method for the lead-zinc-silver ore rich in pyrrhotite and arsenopyrite can comprise the following embodiments:
(1) in step 2, the arsenopyrite combined inhibitor is used as the arsenopyrite combined inhibitor, zinc sulfate and sodium sulfite are used as zinc mineral inhibitors, ethionine is used as a collector, and pine oil is used as a foaming agent to perform lead flotation.
(2) In the step 2, at least one lead scavenging is performed on the lead roughing tailings to improve the recovery rate of lead concentrate, for example, one lead scavenging, two lead scavenging, three lead scavenging and the like can be performed, and no specific limitation is imposed on the lead scavenging, and the specific lead scavenging times and the dosage of lead scavenging operation reagents are adjusted according to actual conditions. When two or more lead scavenging processes are carried out, the arsenopyrite combined inhibitor, zinc sulfate, sodium sulfite, ethidium nitrate and the pine oil are only added in the first lead scavenging process, and the ethidium nitrate and the pine oil are only added in the subsequent lead scavenging process. For example: as shown in fig. 1, performing two lead scavenging on the lead rougher tailings, adding 500-750 g/t of the arsenopyrite combination inhibitor, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethidium and 5-15 g/t of pine oil into the lead rougher tailings, performing first lead scavenging to obtain first lead scavenger middlings and first lead scavenger tailings, and then adding 5-15 g/t of ethidium and 0-5 g/t of pine oil into the first lead scavenger tailings to perform second lead scavenging to obtain second lead scavenger middlings and second lead scavenger tailings; sequentially returning the first lead scavenging middlings and the second lead scavenging middlings to the previous flotation operation; the second lead scavenging tailings are the final lead scavenging tailings.
(3) In step 2, at least one lead concentration is performed on the lead roughing concentrate to improve the grade of the lead concentrate, for example, one lead concentration, two lead concentrations, three lead concentrations, four lead concentrations, and the like may be performed, which is not particularly limited, and the specific lead concentration times and the lead concentration dosage should be adjusted according to actual situations. When two or more lead beneficiations are performed, the arsenopyrite combination inhibitor, zinc sulfate, sodium sulfite, ethionine and pine oil are added only in the first lead beneficiation, and the arsenopyrite combination inhibitor, zinc sulfate and sodium sulfite are added only in the subsequent lead beneficiation. For example: as shown in fig. 1, when the lead roughing concentrate is subjected to the third lead concentration, 500-750 g/t of the arsenopyrite combined inhibitor, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethion and 5-15 g/t of pine oil may be added to the lead roughing concentrate to perform the first lead concentration, so as to obtain a first lead concentration middling and a first lead concentration concentrate, then 250-350 g/t of the arsenopyrite combined inhibitor, 250-350 g/t of zinc sulfate and 150-250 g/t of sodium sulfite are added to the first lead concentration concentrate to perform the second lead concentration, so as to obtain a second lead concentration middling and a second lead concentration concentrate, and then 100-200 g/t of the arsenopyrite combined inhibitor, 100-200 g/t of zinc sulfate, and a third lead concentration are added to the second lead concentration concentrate, Carrying out third lead concentration by 50-100 g/t sodium sulfite to obtain third lead concentration middlings and third lead concentration concentrates; and sequentially returning the first lead concentration middling, the second lead concentration middling and the third lead concentration middling to the previous flotation operation, wherein the third lead concentration concentrate is the final lead concentrate.
(4) In step 5, zinc flotation is carried out by taking the arsenopyrite combined inhibitor as the arsenopyrite combined inhibitor, copper sulfate as an activating agent, ethionamide as a collecting agent and terpineol oil as a foaming agent.
(5) In step 5, at least one zinc scavenging is performed on the zinc roughing tailings to improve the recovery rate of the zinc concentrate, for example, one zinc scavenging, two zinc scavenging, three zinc scavenging, and the like can be performed, which is not particularly limited, and the specific zinc scavenging times and the dosage of the zinc scavenging operation agent are adjusted according to actual conditions. When two or more zinc scavenging are carried out, the arsenopyrite combined inhibitor, the ethidium and the pine alcohol oil are only added in the first zinc scavenging, and the ethidium and the pine alcohol oil are only added in the subsequent zinc scavenging. For example: as shown in fig. 1, zinc scavenging is performed on the zinc roughing tailings twice, then 500-750 g/t of the arsenopyrite combination inhibitor, 20-30 g/t of ethidium and 5-15 g/t of pine oil can be added into the zinc roughing tailings, zinc scavenging is performed for the first time, so that middlings and first zinc scavenging tailings are obtained, then 10-15 g/t of ethidium and 0-5 g/t of pine oil are added into the first zinc scavenging tailings, zinc scavenging is performed for the second time, so that middlings and second zinc scavenging tailings are obtained; the first zinc scavenging middling and the second zinc scavenging middling are sequentially returned to the previous flotation operation; the second zinc scavenging tailings are the final zinc scavenging tailings.
(6) In step 5, at least one zinc concentration is performed on the zinc rough concentration to improve the grade of the zinc concentrate, for example, one zinc concentration, two zinc concentrations, three zinc concentrations, four zinc concentrations, etc. may be performed, which is not particularly limited, and the specific zinc concentration times and the dosage of the zinc concentration operation reagent should be adjusted according to the actual situation. Only the above-described arsenopyrite combination inhibitor was added per zinc concentration. For example: as shown in fig. 1, when the zinc rougher concentrate is subjected to three times of zinc concentration, 500-750 g/t of the arsenopyrite combined inhibitor can be added to the zinc rougher concentrate to perform first zinc concentration, so as to obtain a first zinc concentration middling and a first zinc concentration concentrate, then 250-350 g/t of the arsenopyrite combined inhibitor can be added to the first zinc concentration concentrate to perform second zinc concentration, so as to obtain a second zinc concentration middling and a second zinc concentration concentrate, and then 100-200 g/t of the arsenopyrite combined inhibitor can be added to the second zinc concentration concentrate to perform third zinc concentration, so as to obtain a third zinc concentration middling and a third zinc concentration concentrate; and returning the first zinc concentration middling, the second zinc concentration middling and the third zinc concentration middling to the previous flotation operation in sequence, wherein the third zinc concentration concentrate is the final zinc concentrate.
(7) Middling refers to the tailings of the concentration operation and the foam products of the scavenging operation of the flotation machine in the flotation process. Middlings are between the concentrate and the tailings and need further treatment. The processing method of the middlings is determined according to factors such as the content of intergrowth in the flotation middlings, the floatability of the required concentrates, the composition of the middlings, the foam content of the medicament in the middlings, the requirement on the quality of the concentrates and the like. In the invention, the lead concentrate obtained by each lead concentration is sequentially returned to the previous flotation operation, the lead scavenging middlings obtained by each lead scavenging are sequentially returned to the previous flotation operation, the zinc concentrating middlings obtained by each zinc concentration are sequentially returned to the previous flotation operation, and the zinc scavenging middlings obtained by each zinc scavenging are sequentially returned to the previous flotation operation.
Compared with the prior art, the arsenopyrite combined inhibitor and the lead-zinc-silver ore beneficiation method rich in pyrrhotite and arsenopyrite, which are provided by the invention, have the following advantages:
(1) according to the invention, "lime + calcium hypochlorite + sodium humate" is mixed into the arsenopyrite combined inhibitor according to a specific proportion, and is matched with specific lead flotation, magnetic separation, concentration dehydration and zinc flotation processes, so that the effective separation of lead-zinc-silver minerals from pyrrhotite and arsenopyrite can be realized, and the technical problems that the recovery rate of associated gold and silver is low, flotation foams are sticky, the concentrate grade is not high, ore pulp conveying pipelines and a filter are easy to be calcium-forming and blocked, the arsenic content of lead-zinc concentrate products exceeds the standard and the like due to the fact that the lead-zinc-silver minerals rich in pyrrhotite and arsenopyrite are processed by a traditional high-alkali method when the using amount of lime is too.
(2) The arsenopyrite combined inhibitor provided by the invention can effectively inhibit arsenopyrite in lead-zinc-silver ores.
(3) The arsenopyrite combined inhibitor takes lime, calcium hypochlorite and sodium humate as raw materials, and the lime, the calcium hypochlorite and the sodium humate are common mineral dressing agents, are low in price and easy to obtain, and cannot pollute the environment.
(4) In the process of treating the complex lead-zinc-silver ore which is rich in pyrrhotite and arsenopyrite and is difficult to treat, the ore pulp does not need to be specially treated, the process is easy to control, and the technical index is stable.
(5) The beneficiation wastewater generated by the beneficiation method for the lead-zinc-silver ore rich in pyrrhotite and arsenopyrite provided by the invention can be directly recycled, so that water resources are effectively saved.
(6) The beneficiation method for the lead-zinc-silver ore rich in pyrrhotite and arsenopyrite, provided by the invention, is simple and easy to implement, strong in adaptability to materials, safe and stable to use, small in dosage of a medicament, low in alkalinity of ore pulp, environment-friendly and good in application prospect.
In conclusion, the embodiment of the invention can realize the effective separation of the lead-zinc-silver mineral from the pyrrhotite and the arsenopyrite, can effectively avoid the technical problems that the traditional high-alkali method is easy to cause low recovery rate of associated gold and silver, sticky flotation foam, low concentrate grade, easy calcium accumulation and blockage of an ore pulp conveying pipeline and a filter, excessive arsenic content of a lead-zinc concentrate product and the like, is simple, easy, efficient and environment-friendly, is beneficial to improving the comprehensive utilization level of resources, increases the enterprise benefit and protects the ecological environment.
In order to more clearly show the technical scheme and the technical effects provided by the invention, the arsenopyrite combination inhibitor and the beneficiation method of the high-sulfur high-arsenic lead-zinc silver ore provided by the invention are described in detail by using specific examples.
Example 1
In certain lead-zinc-silver polymetallic ores rich in pyrrhotite and arsenopyrite in inner Mongolia, the silver grade is 118.14g/t, the lead grade is 1.14%, the zinc grade is 3.68%, the sulfur grade is 14.50%, and the arsenic grade is 2.54%. The lead in the ore exists mainly in the form of galena, the zinc mineral exists mainly in the form of marmatite, the silver mineral exists mainly in the form of silver tetrahedrite, and other metal sulfides are mainly pyrrhotite and arsenopyrite. The gangue minerals mainly comprise quartz and muscovite, and small amount of biotite, chlorite, kaolinite, fluorite, etc.
As shown in fig. 1, a beneficiation method for lead-zinc-silver ore rich in pyrrhotite and arsenopyrite is used for treating a lead-zinc-silver polymetallic ore rich in pyrrhotite and arsenopyrite in inner mongolia, and specifically includes the following steps:
step 1, preparing ore pulp: taking a lead-zinc-silver polymetallic ore rich in pyrrhotite and arsenopyrite in inner Mongolia as raw ore, crushing the raw ore, adding the crushed raw ore into a grinding machine, and grinding the raw ore until the fineness of the raw ore is-0.074 mm and accounts for 80 percent, thereby obtaining raw ore pulp with the concentration of 30-40 percent.
Step 2, lead flotation: the raw ore pulp can comprise the following steps of lead roughing, lead scavenging and lead concentration for three times:
(1) lead roughing: and adding 1000g/t of the arsenopyrite combined inhibitor, 1000g/t of zinc sulfate, 500g/t of sodium sulfite, 40g/t of ethidium nitrate and 20g/t of pine oil into the raw ore pulp, and performing lead roughing to obtain lead roughing concentrate and lead roughing tailings.
(2) Lead scavenging: adding 500g/t of the arsenopyrite combined inhibitor, 500g/t of zinc sulfate, 250g/t of sodium sulfite, 20g/t of ethion and 10g/t of pine oil into the lead roughing tailings, performing first lead scavenging to obtain first lead scavenging middlings and first lead scavenging tailings, and then adding 10g/t of ethion and 5g/t of pine oil into the first lead scavenging tailings to perform second lead scavenging to obtain second lead scavenging middlings and second lead scavenging tailings; sequentially returning the first lead scavenging middlings and the second lead scavenging middlings to the previous flotation operation; the second lead scavenging tailings are the final lead scavenging tailings.
(3) Lead concentration: adding 500g/t of the arsenopyrite combined inhibitor, 500g/t of zinc sulfate, 250g/t of sodium sulfite, 15g/t of ethidium nitrate and 5g/t of pine oil into the lead roughing concentrate to carry out first lead concentration so as to obtain first lead concentration middlings and first lead concentration concentrate, then adding 250g/t of the arsenopyrite combined inhibitor, 250g/t of zinc sulfate and 150g/t of sodium sulfite into the first lead concentration concentrate to carry out second lead concentration, so as to obtain second lead concentration middlings and second lead concentration concentrates, and then adding 100g/t of the arsenopyrite combined inhibitor, 100g/t of zinc sulfate and 50g/t of sodium sulfite into the second lead concentration concentrates to carry out third lead concentration, so as to obtain third lead concentration middlings and third lead concentration concentrates; and sequentially returning the first lead concentration middling, the second lead concentration middling and the third lead concentration middling to the previous flotation operation, wherein the third lead concentration concentrate is the final lead concentrate.
Step 3, magnetic separation: and feeding the second lead scavenging tailings into a magnetic drum for magnetic separation under the magnetic induction of 2000Oe, so as to obtain magnetic separation concentrate (the magnetic separation concentrate is sulfur concentrate mainly comprising pyrrhotite) and magnetic separation tailings.
Step 4, dewatering magnetic separation tailings: and concentrating and dehydrating the magnetic separation tailings to obtain concentrated ore pulp with the concentration of 30-40%.
Step 5, zinc flotation: the concentrated pulp may include the following zinc roughing, two zinc scavenging and three zinc concentrating:
(1) roughing zinc: and adding 1000g/t of the arsenopyrite combined inhibitor, 150g/t of copper sulfate, 50g/t of ethidium and 20g/t of pine oil into the concentrated ore pulp, and performing zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings.
(2) Zinc scavenging: adding 500g/t of the arsenopyrite combined inhibitor, 20g/t of ethidium and 10g/t of pine oil into the zinc roughing tailings, performing first zinc scavenging to obtain first zinc scavenging middlings and first zinc scavenging tailings, and then adding 10g/t of ethidium and 5g/t of pine oil into the first zinc scavenging tailings to perform second zinc scavenging to obtain second zinc scavenging middlings and second zinc scavenging tailings; the first zinc scavenging middling and the second zinc scavenging middling are sequentially returned to the previous flotation operation; the second zinc scavenging tailings are the final zinc scavenging tailings.
(3) Zinc fine selection: adding 500g/t of the arsenopyrite combined inhibitor to the zinc rougher concentrate to perform first zinc concentration, thereby obtaining first zinc concentration middlings and first zinc concentration concentrates, then adding 250g/t of the arsenopyrite combined inhibitor to the first zinc concentration concentrates to perform second zinc concentration, thereby obtaining second zinc concentration middlings and second zinc concentration concentrates, and then adding 100g/t of the arsenopyrite combined inhibitor to the second zinc concentration concentrates to perform third zinc concentration, thereby obtaining third zinc concentration middlings and third zinc concentration concentrates; and returning the first zinc concentration middling, the second zinc concentration middling and the third zinc concentration middling to the previous flotation operation in sequence, wherein the third zinc concentration concentrate is the final zinc concentrate.
Specifically, the treatment results of example 1 of the present invention on a lead-zinc-silver polymetallic ore rich in pyrrhotite and arsenopyrite in inner mongolia are shown in the following table 1:
TABLE 1
Example 2
In a lead-zinc-silver polymetallic ore rich in pyrrhotite and arsenopyrite in Guangdong, the silver grade is 92.33g/t, the lead grade is 0.86%, the zinc grade is 4.06%, the sulfur grade is 18.12%, and the arsenic grade is 3.23%. The lead in the ore exists mainly in the form of galena, the zinc mineral exists mainly in the form of marmatite, the silver mineral exists mainly in the form of silver tetrahedrite, and other metal sulfides are mainly pyrrhotite and arsenopyrite. The gangue minerals are mainly quartz, muscovite, chlorite, kaolinite, fluorite, etc.
As shown in fig. 1, a beneficiation method for lead-zinc-silver ore rich in pyrrhotite and arsenopyrite is used for treating the lead-zinc-silver polymetallic ore rich in pyrrhotite and arsenopyrite in the guangdong, and specifically includes the following steps:
step 1, preparing ore pulp: taking a lead-zinc-silver polymetallic ore rich in pyrrhotite and arsenopyrite in Guangdong as a raw ore, crushing the raw ore, adding the crushed raw ore into a grinding machine, and grinding the raw ore until the fineness is-0.074 mm and the content of the crushed raw ore accounts for 78%, thereby obtaining raw ore pulp with the concentration of 30-40%.
Step 2, lead flotation: the raw ore pulp can comprise the following steps of lead roughing, lead scavenging and lead concentration for three times:
(1) lead roughing: 1200g/t of the arsenopyrite combined inhibitor, 1200g/t of zinc sulfate, 600g/t of sodium sulfite, 35g/t of ethidium nitrate and 25g/t of pine oil are added into the raw ore pulp for lead roughing, so that lead roughing concentrate and lead roughing tailings are obtained.
(2) Lead scavenging: adding 600g/t of the arsenopyrite combined inhibitor, 600g/t of zinc sulfate, 300g/t of sodium sulfite, 20g/t of ethion and 10g/t of pine oil into the lead roughing tailings, performing first lead scavenging to obtain first lead scavenging middlings and first lead scavenging tailings, and then adding 10g/t of ethion and 5g/t of pine oil into the first lead scavenging tailings to perform second lead scavenging to obtain second lead scavenging middlings and second lead scavenging tailings; sequentially returning the first lead scavenging middlings and the second lead scavenging middlings to the previous flotation operation; the second lead scavenging tailings are the final lead scavenging tailings.
(3) Lead concentration: adding 600g/t of the arsenopyrite combined inhibitor, 600g/t of zinc sulfate, 300g/t of sodium sulfite, 15g/t of ethidium and 5g/t of pine oil into the lead roughing concentrate to carry out first lead concentration so as to obtain first lead concentration middlings and first lead concentration concentrate, then 300g/t of the arsenopyrite combined inhibitor, 300g/t of zinc sulfate and 150g/t of sodium sulfite are added into the first lead concentration concentrate to carry out second lead concentration, so as to obtain second lead concentration middlings and second lead concentration concentrates, and then adding 100g/t of the arsenopyrite combined inhibitor, 100g/t of zinc sulfate and 50g/t of sodium sulfite into the second lead concentration concentrates to carry out third lead concentration, so as to obtain third lead concentration middlings and third lead concentration concentrates; and sequentially returning the first lead concentration middling, the second lead concentration middling and the third lead concentration middling to the previous flotation operation, wherein the third lead concentration concentrate is the final lead concentrate.
Step 3, magnetic separation: and feeding the secondary lead scavenging tailings into a magnetic roller for magnetic separation under the magnetic induction of 1800Oe, thereby obtaining magnetic separation concentrate (the magnetic separation concentrate is sulfur concentrate mainly comprising pyrrhotite) and magnetic separation tailings.
Step 4, dewatering magnetic separation tailings: and concentrating and dehydrating the magnetic separation tailings to obtain concentrated ore pulp with the concentration of 30-40%.
Step 5, zinc flotation: the concentrated pulp may include the following zinc roughing, zinc scavenging and zinc concentrating:
(1) roughing zinc: 1200g/t of the arsenopyrite combined inhibitor, 200g/t of copper sulfate, 55g/t of ethion nitrogen and 25g/t of pine oil are added into the concentrated ore pulp for zinc roughing, so that zinc roughing concentrate and zinc roughing tailings are obtained.
(2) Zinc scavenging: adding 600g/t of the arsenopyrite combined inhibitor, 25g/t of ethidium and 10g/t of pine oil into the zinc roughing tailings, performing first zinc scavenging to obtain first zinc scavenging middlings and first zinc scavenging tailings, and then adding 10g/t of ethidium and 5g/t of pine oil into the first zinc scavenging tailings to perform second zinc scavenging to obtain second zinc scavenging middlings and second zinc scavenging tailings; the first zinc scavenging middling and the second zinc scavenging middling are sequentially returned to the previous flotation operation; the second zinc scavenging tailings are the final zinc scavenging tailings.
(3) Zinc fine selection: adding 600g/t of the arsenopyrite combined inhibitor to the zinc roughing concentrate to perform first zinc concentration so as to obtain first zinc concentration middlings and first zinc concentration concentrate, and then adding 300g/t of the arsenopyrite combined inhibitor to the first zinc concentration concentrate to perform second zinc concentration so as to obtain second zinc concentration middlings and second zinc concentration concentrate; and the first zinc concentration middlings and the second zinc concentration middlings are sequentially returned to the previous flotation operation, and the second zinc concentration concentrates are final zinc concentrates.
Specifically, the results of processing the silver-lead-zinc polymetallic ore rich in pyrrhotite and arsenopyrite in Guangdong of example 2 of the present invention are shown in the following table 2:
TABLE 2
In conclusion, the embodiment of the invention can realize the effective separation of the lead-zinc-silver mineral from the pyrrhotite and the arsenopyrite, can effectively avoid the technical problems that the traditional high-alkali method is easy to cause low recovery rate of associated gold and silver, sticky flotation foam, low concentrate grade, easy calcium accumulation and blockage of an ore pulp conveying pipeline and a filter, excessive arsenic content of a lead-zinc concentrate product and the like, is simple, easy, efficient and environment-friendly, is beneficial to improving the comprehensive utilization level of resources, increases the enterprise benefit and protects the ecological environment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The poisonous sand combined inhibitor is characterized by being prepared by mixing lime, calcium hypochlorite and sodium humate, wherein the mass ratio of the lime to the calcium hypochlorite is as follows: calcium hypochlorite: sodium humate is 4.0-8.0: 2.0-4.0: 1.0-2.0.
2. The beneficiation method of the lead-zinc-silver ore rich in pyrrhotite and arsenopyrite is characterized by comprising the following steps of:
step 1, preparing ore pulp: grinding the lead-zinc-silver ore raw ore rich in pyrrhotite and arsenopyrite to 75-85% of fineness of-0.074 mm, thereby obtaining raw ore pulp with the concentration of 30-40%;
step 2, lead flotation: adding 1000-1500 g/t of the arsenopyrite combined inhibitor of claim 1, 1000-1500 g/t of zinc sulfate, 500-750 g/t of sodium sulfite, 30-50 g/t of ethyl sulfur nitrogen and 15-30 g/t of pine oil into the raw ore pulp, and performing lead roughing to obtain lead roughing concentrate and lead roughing tailings; adding 500-750 g/t of the arsenopyrite combined inhibitor of claim 1, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethyl sulfur nitrogen and 5-15 g/t of pine oil into the lead roughing tailings, and performing at least one lead scavenging to obtain lead scavenging middlings and lead scavenging tailings; returning the lead scavenging middling sequence to the previous flotation operation; adding 500-750 g/t of the arsenopyrite combined inhibitor of claim 1, 500-750 g/t of zinc sulfate, 250-350 g/t of sodium sulfite, 15-30 g/t of ethyl sulfur nitrogen and 5-15 g/t of pine oil into the lead roughing concentrate, and carrying out at least one lead concentration to obtain lead concentration middlings and lead concentrate; returning the lead concentration middlings to the previous flotation operation in sequence;
step 3, magnetic separation: carrying out magnetic separation on the lead scavenging tailings under the magnetic induction intensity of 1500-3000 Oe, thereby obtaining magnetic separation concentrate and magnetic separation tailings;
step 4, dewatering magnetic separation tailings: concentrating and dehydrating the magnetic separation tailings to obtain concentrated ore pulp with the concentration of 30-40%;
step 5, zinc flotation: adding 1000-1500 g/t of the arsenopyrite combined inhibitor of claim 1, 100-200 g/t of copper sulfate, 40-60 g/t of ethidium and 15-30 g/t of pine oil into the concentrated ore pulp, and performing zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings; adding 500-750 g/t of the arsenopyrite combination inhibitor of claim 1, 20-30 g/t of ethion and 5-15 g/t of pine oil into the zinc roughing tailings, and performing zinc scavenging for at least one time to obtain zinc scavenging middlings and zinc scavenging tailings; returning the zinc scavenging middling sequence to the previous flotation operation; adding 500-750 g/t of the arsenopyrite combined inhibitor of claim 1 to the zinc rougher concentrate, and performing at least one zinc cleaner to obtain a zinc cleaner middlings and a zinc concentrate; and returning the zinc concentration middlings to the previous flotation operation in sequence.
3. The beneficiation method of the lead-zinc-silver ore enriched in pyrrhotite and arsenopyrite according to claim 2, wherein in step 2, when two or more lead sweeps are performed, the arsenopyrite combination inhibitor according to claim 1, zinc sulfate, sodium sulfite, ethidium nitrate and pine oil are added only in the first lead sweep, and only ethidium nitrate and pine oil are added in the subsequent lead sweep.
4. The beneficiation method of lead-zinc-silver ores enriched in pyrrhotite and arsenopyrite according to claim 2 or 3, wherein in step 2, when two or more lead beneficiations are performed, the arsenopyrite combination inhibitor according to claim 1, zinc sulfate, sodium sulfite, ethionine and pine oil are added only in the first lead beneficiating, and only the arsenopyrite combination inhibitor according to claim 1, zinc sulfate and sodium sulfite are added in the subsequent lead beneficiating.
5. The beneficiation method of lead-zinc-silver ores enriched in pyrrhotite and arsenopyrite according to claim 2 or 3, wherein in step 5, when two or more zinc sweeps are performed, the arsenopyrite combination inhibitor, ethidium and pine oil according to claim 1 are added only in the first zinc sweep, and only ethidium and pine oil are added in the subsequent zinc sweep.
6. The beneficiation process of lead zinc silver ores enriched in pyrrhotite and arsenopyrite according to claim 2 or 3, wherein in step 5, only the arsenopyrite combination inhibitor according to claim 1 is added per zinc beneficiation.
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