CN113751206B - Beneficiation method for arsenic-containing lead-zinc ore - Google Patents
Beneficiation method for arsenic-containing lead-zinc ore Download PDFInfo
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- CN113751206B CN113751206B CN202111080077.0A CN202111080077A CN113751206B CN 113751206 B CN113751206 B CN 113751206B CN 202111080077 A CN202111080077 A CN 202111080077A CN 113751206 B CN113751206 B CN 113751206B
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- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 235
- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 226
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 59
- 239000012141 concentrate Substances 0.000 claims abstract description 177
- 238000005188 flotation Methods 0.000 claims abstract description 79
- 239000003814 drug Substances 0.000 claims abstract description 75
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 24
- 239000011707 mineral Substances 0.000 claims abstract description 24
- -1 sulfur arsenic lead Chemical compound 0.000 claims abstract description 21
- 230000002000 scavenging effect Effects 0.000 claims description 133
- 229940079593 drug Drugs 0.000 claims description 45
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 41
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 41
- 229960001763 zinc sulfate Drugs 0.000 claims description 41
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 36
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 36
- 239000004571 lime Substances 0.000 claims description 36
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical compound CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 claims description 35
- CMGLSTYFWSQNEC-UHFFFAOYSA-N o-ethyl n-ethylcarbamothioate Chemical class CCNC(=S)OCC CMGLSTYFWSQNEC-UHFFFAOYSA-N 0.000 claims description 27
- 239000003112 inhibitor Substances 0.000 claims description 25
- GGLZPLKKBSSKCX-YFKPBYRVSA-N L-ethionine Chemical class CCSCC[C@H](N)C(O)=O GGLZPLKKBSSKCX-YFKPBYRVSA-N 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 14
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 14
- 239000002516 radical scavenger Substances 0.000 claims description 11
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 7
- 239000007844 bleaching agent Substances 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 235000010265 sodium sulphite Nutrition 0.000 claims description 7
- 239000002283 diesel fuel Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 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
- 229920000767 polyaniline Polymers 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims 2
- 238000000926 separation method Methods 0.000 abstract description 10
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 45
- 239000011701 zinc Substances 0.000 description 41
- 229910052725 zinc Inorganic materials 0.000 description 41
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 36
- RIZMRRKBZQXFOY-UHFFFAOYSA-N ethion Chemical compound CCOP(=S)(OCC)SCSP(=S)(OCC)OCC RIZMRRKBZQXFOY-UHFFFAOYSA-N 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 18
- 229910052949 galena Inorganic materials 0.000 description 8
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 description 5
- 229910052964 arsenopyrite Inorganic materials 0.000 description 5
- 229910052981 lead sulfide Inorganic materials 0.000 description 4
- 229940056932 lead sulfide Drugs 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 2
- 239000005083 Zinc sulfide Substances 0.000 description 2
- HUEBVZADHUOMHL-UHFFFAOYSA-N [As].[Pb] Chemical compound [As].[Pb] HUEBVZADHUOMHL-UHFFFAOYSA-N 0.000 description 2
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YBRBMKDOPFTVDT-UHFFFAOYSA-N tert-butylamine Chemical compound CC(C)(C)N YBRBMKDOPFTVDT-UHFFFAOYSA-N 0.000 description 2
- 229910052984 zinc sulfide Inorganic materials 0.000 description 2
- 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 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- LAISNASYKAIAIK-UHFFFAOYSA-N [S].[As] Chemical compound [S].[As] LAISNASYKAIAIK-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229910052957 realgar Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910001656 zinc mineral Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of mineral processing, and particularly discloses a mineral separation method of arsenic-containing lead-zinc ores. The arsenic-containing lead-zinc ore treated by the method comprises the following steps of: grinding the lead zinc ore containing arsenic into ore pulp, carrying out arsenic flotation to obtain arsenic concentrate, and carrying out lead flotation to obtain lead concentrate. According to the beneficiation method for the arsenic-containing lead-zinc ore, the arsenic flotation is creatively performed for the first time, the arsenic concentrate is obtained through ore grinding and adopting a proper arsenic flotation process and a flotation reagent, and the gray sulfur arsenic lead ore contained in the arsenic-containing lead-zinc ore is basically recycled into the arsenic concentrate so as not to enter lead flotation operation; and then carrying out lead flotation on tailings obtained by arsenic flotation, wherein under a proper lead flotation process and a flotation reagent, the arsenic content in lead concentrate obtained by flotation is obviously reduced, and the arsenic grade is controlled below 0.4%. The method also has the advantages of small dosage of the medicament and good separation effect.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a mineral separation method of arsenic-containing lead-zinc ores.
Background
The arsenic removal and arsenic reduction of lead concentrate products in the beneficiation of the lead zinc ores containing arsenic are important research subjects. At present, arsenic is reduced by a mineral separation method mainly aiming at arsenic-containing minerals such as arsenopyrite, realgar and arsenopyrite. For example, chinese patent publication No. CN105251620B discloses a complex beneficiation method for arsenic-containing lead zinc sulfide ores, which can obtain qualified lead and zinc concentrate products containing arsenic. In chinese patent application publication No. CN106513182a, a beneficiation method for arsenic-containing lead sulfide ore is disclosed, and lead concentrate and arsenic concentrate can be obtained, wherein the lead grade of the lead concentrate is 66.30%, the lead recovery rate is 85.04%, the arsenic grade of the arsenic concentrate is 8.48%, and the arsenic recovery rate is 79.84%. The arsenic reduction method aims at arsenic reduction of the arsenopyrite arsenic-containing minerals in the above patent, and because the arsenopyrite arsenic-containing minerals can be dissociated or separated from lead zinc sulfide ores by physical means such as ore grinding, the arsenic in the arsenopyrite arsenic-containing minerals is easier to remove, and corresponding qualified concentrate products are obtained.
But howeverThere has been no breakthrough in the study of the arsenic reduction of lead concentrate for gray sulfur arsenic lead minerals containing arsenic in a lattice similar to galena in nature. Gray sulfur arsenic lead ore (Pb) 5 (Sb,As) 2 S 8 ) The crystal is plate-shaped, has pseudo hexagonal shape, lead gray color, opacity, metallic luster, shell shape of fracture, friable property, hardness of 3, and density of 6.44g/cm 3 . The gray sulfur arsenic lead ore and galena are in continuous generation, the embedded granularity is fine, and a small part of gray sulfur arsenic lead ore is contained in the galena in inclusion smaller than 10 microns, so that the arsenic content in the lead concentrate exceeds the standard. Because the properties of the gray sulfur arsenic lead ore are very similar to those of galena, the flow direction of the gray sulfur arsenic lead ore in ore dressing is basically consistent with that of galena, once the raw ore contains the arsenic-containing mineral, the arsenic-containing mineral enters the lead concentrate in the flotation process, and the lead concentrate is easy to exceed the standard of arsenic. If the arsenic content in the lead concentrate exceeds the standard, the quality of smelting products can be seriously affected, and harmful substances can be generated by arsenic in the smelting process, equipment is corroded, and the atmosphere is polluted.
Therefore, the lead concentrate with the arsenic content meeting the requirement is obtained by carrying out intensive research on the arsenic-containing lead-zinc minerals of the gray sulfur-arsenic lead ores so as to effectively solve the problem of separation from galena.
Disclosure of Invention
The invention mainly solves the technical problem of providing the beneficiation method for the lead-zinc ore containing arsenic, and the lead concentrate product with the arsenic content lower than 0.4% can be obtained.
In order to solve the technical problems, the invention adopts the following technical scheme: an arsenical lead-zinc ore dressing method, wherein the arsenical lead-zinc ore contains gray sulfur arsenical lead ore, and the dressing method comprises the following steps: grinding the arsenic-containing lead-zinc ore into ore pulp, carrying out arsenic flotation to obtain arsenic concentrate, and carrying out lead flotation to obtain lead concentrate.
And performing zinc flotation on the obtained lead tailings to obtain zinc concentrate.
As a preferred embodiment of the invention, the arsenic flotation comprises one arsenic rougher, at least one beneficiation and at least one scavenger; the agent adopted by the arsenic roughing comprises an arsenic collector and a combined inhibitor; and/or the agent used for the beneficiation comprises a combination inhibitor, and/or the agent used for the scavenging comprises an arsenic collector;
wherein the arsenic collector comprises nigrosine and modified ethyl thiourethane; the combination inhibitor comprises at least one of sodium carbonate, humate, bleaching powder, sodium sulfite and zinc sulfate.
As a preferred embodiment of the invention, the combined inhibitor is a mixture of sodium carbonate, humate, bleaching powder, sodium sulfite and zinc sulfate, and the mass ratio of the sodium carbonate, the humate, the bleaching powder, the sodium sulfite and the zinc sulfate in the combined inhibitor is (15-25): (5-10): (10-20): (20-30): (30-50);
the modified ethyl thiourethane is a mixture of ethyl thiourethane and diesel oil, and preferably the ethyl thiourethane and the diesel oil are mixed according to the mass ratio of 1 (2-4).
As a preferred embodiment of the invention, the arsenic flotation comprises one arsenic rougher, 1-2 beneficiations and 1-2 scavenger, preferably the arsenic flotation comprises one arsenic rougher, 2 beneficiations and 2 scavenger.
As a preferred embodiment of the invention, the medicaments adopted in arsenic roughing are a combined inhibitor, an aniline black drug and modified ethyl thiourethane, wherein the dosage of the combined inhibitor is 1000-2500 g/t, the dosage of the aniline black drug is 5-50 g/t, and the dosage of the modified ethyl thiourethane is 10-50 g/t based on the mass of the arsenical lead zinc ore raw ore;
the first carefully chosen medicament is a combined inhibitor, and the dosage of the combined inhibitor is 100-500 g/t based on the mass of the arsenical lead zinc ore raw ore; and/or the medicament adopted in the second concentration is a combined inhibitor, and the dosage of the combined inhibitor is 50-100 g/t based on the mass of the arsenicum lead zinc ore raw ore;
the medicaments adopted in the first scavenging are nigrosine medicaments and modified ethyl thiourethane, wherein the dosage of the nigrosine medicaments is 2-20 g/t and the dosage of the modified ethyl thiourethane is 4-20 g/t based on the raw mineral mass of arsenical lead zinc ores; and/or the agents adopted in the second scavenging are nigrosine drugs and modified ethyl thiourethane, wherein the dosage of the nigrosine drugs is 1-10 g/t and the dosage of the modified ethyl thiourethane is 1-10 g/t based on the mass of the arsenical lead zinc ore raw ore.
As a preferred embodiment of the invention, the lead flotation comprises one lead roughing, at least one beneficiation and at least one scavenging; the medicament adopted by lead roughing comprises lime, zinc sulfate, ethionazole, butylammonium black medicine and No. 2 oil; and/or, the medicaments adopted by the fine selection comprise lime and zinc sulfate; and/or the agent used for scavenging comprises ethionazole and butylammonium black medicine.
As a preferred embodiment of the invention, the lead flotation comprises one lead roughing, 1-2 beneficiations and 1-3 scavenger, preferably the lead flotation comprises one lead roughing, 2 beneficiations and 3 scavenger.
As a preferred embodiment of the invention, the medicaments adopted by the lead roughing are lime, zinc sulfate, ethionazole, butylammonium black medicine and No. 2 oil; based on the raw mineral mass of the arsenical lead zinc ore, the lime, zinc sulfate, ethionamide, butylammonium black drug and No. 2 oil (i.e. 2 # Oil) is respectively 1000-5000 g/t, 1000-2000 g/t, 40-100 g/t, 20-50 g/t and 5-30 g/t;
the medicaments adopted in the first selection are lime and zinc sulfate, and the dosage of the lime and the zinc sulfate is respectively 200-500 g/t and 100-200 g/t according to the mass of the arsenical lead zinc ore raw ore; and/or the medicaments adopted in the second concentration are lime and zinc sulfate, and the dosages of the lime and the zinc sulfate are respectively 100-200 g/t and 50-100 g/t according to the mass of the arsenicum lead zinc ore raw ore;
the preparation adopted in the first scavenging is ethionine and butylammonium black drug, and the dosage of the ethionine and the butylammonium black drug is respectively 20-50 g/t and 10-25 g/t according to the mass of the arsenicum lead zinc ore raw ore; and/or the agents adopted in the second scavenging are ethionine and butylamine black drug, and the dosage of the ethionine and the butylamine black drug is respectively 10-25 g/t and 5-15 g/t according to the mass of the arsenicum lead zinc ore raw ore; and/or the agent adopted in the third scavenging is ethionine and butylammonium black drug, and the dosage of the ethionine and the butylammonium black drug is respectively 1-10 g/t and 1-10 g/t according to the mass of the arsenicum lead zinc ore raw ore.
In the invention, the fineness of the arsenic-containing lead-zinc ore grinding is 65-85% of-0.075 mm, namely the mass percentage of the ore with the grain diameter smaller than 0.075mm in the grinding product is 65-85%.
The invention provides a mineral separation method of arsenic-containing lead-zinc ore, wherein arsenic in the treated arsenic-containing lead-zinc ore mainly exists in the form of gray sulfur arsenic lead ore and arsenic lead ore. Wherein the crystal lattice of the gray sulfur arsenic lead mineral contains arsenic, and the physical method cannot remove the arsenic. And because various physical and chemical properties of the gray sulfur arsenic lead ore are similar to those of galena, the flow direction of the gray sulfur arsenic lead ore in the ore dressing is basically consistent with that of the galena, and arsenic easily enters the lead concentrate in the flotation process, so that arsenic in the lead concentrate obtained by flotation exceeds standard, and the arsenic content in the lead concentrate obtained by flotation is generally more than 0.5%, so that the next use of the lead concentrate is seriously influenced. Therefore, how to obtain a lead concentrate product with acceptable arsenic content is a problem to be solved.
At present, when treating arsenic-containing lead-zinc ore containing gray sulfur arsenic lead ore, there is a method of carrying out lead flotation to obtain lead concentrate, and then carrying out ore dressing and arsenic reduction on the lead concentrate. The existing beneficiation process has the problems of large dosage of medicament and poor arsenic reduction and separation effects. Because the lead concentrate obtained by flotation contains more medicament, in order to achieve the arsenic reduction separation effect, the medicament needs to be removed firstly, and then the arsenic reduction flotation is carried out, so that the inhibitor consumption is also more.
The invention provides a beneficiation method of arsenical lead-zinc ore, which adopts a 'preferential arsenic flotation-post lead flotation' process for the first time, namely, arsenic flotation is carried out firstly, and specifically comprises the following steps: through grinding, then adopting a proper arsenic flotation process and a flotation reagent, obtaining arsenic concentrate through flotation, and basically recycling gray sulfur arsenic lead ore contained in arsenic-containing lead zinc ore into the arsenic concentrate so as not to enter lead flotation operation; then, carrying out lead flotation on tailings obtained by arsenic flotation, and under a proper lead flotation process and a flotation reagent, obviously reducing the arsenic content in lead concentrate obtained by flotation, wherein the arsenic grade energy is controlled to be below 0.4 percent and about 0.35 percent, so that the problem of exceeding the standard of the arsenic content in the lead concentrate is effectively solved; and then carrying out zinc flotation on tailings obtained by lead flotation, wherein the problem of exceeding arsenic content of zinc concentrate is generally avoided, and the qualified zinc concentrate can be obtained by recycling zinc in the obtained lead tailings by adopting the conventional zinc flotation method. The method can be used for treating the arsenic-containing plumbum-zinc ore, is particularly suitable for treating the arsenic-containing plumbum-zinc ore containing gray sulfur, arsenic-containing plumbum-zinc ore, can respectively obtain arsenic concentrate, qualified arsenic-containing plumbum concentrate and zinc concentrate products, and effectively separates minerals in the arsenic-containing plumbum-zinc ore.
Drawings
FIG. 1 is a process flow diagram of a beneficiation method for arsenical lead zinc ores provided by the invention;
FIG. 2 is a process flow diagram of the beneficiation process of the arsenic-containing lead-zinc ore employed in comparative examples 1-3 of the present invention.
Detailed Description
The technical scheme of the invention is described in detail through specific examples.
In the following examples, the drugs used are commercially available products unless otherwise specified. The concentration or content in each example is mass percent.
The combination inhibitor used in examples 1 to 3 (the combination inhibitor is represented by Tf in the following examples) was a mixture of sodium carbonate, humate, bleaching powder, sodium sulfite and zinc sulfate, and the mass ratio of sodium carbonate, humate, bleaching powder, sodium sulfite and zinc sulfate in the combination inhibitor was: 20:8:15:25:40. Wherein the humate comprises sodium humate, potassium humate, magnesium humate, zinc humate, etc.
The collector modified ethyl thiourethane is a mixture of ethyl thiourethane and diesel oil, and the ethyl thiourethane and the diesel oil are mixed according to the mass ratio of 1:3.
The dosage g/t of the agent is relative to the weight of the treated raw ore.
During flotation operation, the times of scavenging and carefully selecting can be adjusted according to actual conditions.
As the tailings obtained by lead flotation are subjected to zinc flotation again, the problem that the arsenic content of zinc concentrate exceeds the standard is generally avoided, and therefore, a qualified zinc concentrate product can be obtained by adopting a conventional zinc flotation method for the lead flotation tailings. For example, in the following examples and comparative examples, zinc flotation can be performed to obtain zinc concentrate by the following process, and the present invention is not limited thereto.
Zinc flotation process: adding sulfur inhibitor (lime 0-4000 g/t), zinc activator (copper sulfate 50-300 g/t), zinc collector (butyl xanthate 5-100 g/t), and foaming agent (2 g/t 5-30 g/t) # Oil), zinc roughing concentrate and zinc roughing tailings are obtained through zinc roughing for 1-2 times; adding sulfur inhibitor (lime with the dosage of 0-1000 g/t) into the zinc roughing concentrate, and carrying out zinc concentration for 0-4 times to obtain zinc concentrate; adding butyl xanthate with the dosage of 0-50g/t into the zinc roughing tailings, and obtaining the zinc scavenging tailings after 1-5 times of zinc scavenging. Wherein, any of the above middlings of zinc scavenging and zinc concentrating are respectively returned to the previous layer of operation in sequence.
Example 1
The method comprises the steps of (1) treating raw ores of arsenical lead-zinc ores by adopting a process flow shown in figure 1, wherein the raw ores contain 6.25% of lead, 0.25% of arsenic and 82.35% of lead sulfide; arsenic mainly exists in the form of gray sulfur arsenic lead ore and arsenic lead ore. The flotation process is as follows:
(1) Grinding the raw ore to the grinding fineness of-0.075 mm accounting for 70%;
(2) Adding the ground ore pulp into a flotation machine, adding 1500g/t Tf, stirring, adding 5g/t nigrosine and 10g/t modified ethylthiourethane, and carrying out arsenic roughing to obtain arsenic roughing concentrate and arsenic roughing tailings;
(3) Adding 2g/t of nigrosine and 5g/t of modified ethyl thiourethane into the arsenic roughing tailings, stirring, and carrying out primary arsenic scavenging to obtain primary arsenic scavenging concentrate and primary arsenic scavenging tailings, wherein the primary arsenic scavenging concentrate returns to the previous operation;
(4) Adding 1g/t of nigrosine and 2g/t of modified ethyl thiourethane into the arsenic primary scavenging tailings, stirring, and then carrying out arsenic secondary scavenging to obtain arsenic secondary scavenging concentrate and arsenic secondary scavenging tailings, wherein the arsenic secondary scavenging concentrate returns to the previous operation;
(5) Adding Tf of 100g/t into the arsenic roughing concentrate, stirring, and carrying out primary arsenic concentration to obtain arsenic primary concentrate and arsenic primary tailings, wherein the arsenic primary tailings return to the previous operation;
(6) Adding 50g/t Tf into the arsenic primary concentrate, stirring, and carrying out arsenic secondary concentration to obtain arsenic secondary concentrate and arsenic secondary tailings, wherein the arsenic secondary tailings return to the previous operation, and the obtained arsenic secondary concentrate is arsenic concentrate;
(7) Adding 2000g/t lime, 1500g/t zinc sulfate, 50g/t ethionine, 30g/t butylammonium black drug and 10g/t 2 into the arsenic secondary scavenger tailings, namely arsenic tailings # Oil is subjected to lead roughing, and lead roughing concentrate and lead roughing tailings are obtained;
(8) Adding 25g/t of ethion nitrogen and 15g/t of butylamine black drug into the lead roughing tailings, stirring, and then carrying out primary lead scavenging to obtain primary lead scavenging concentrate and primary lead scavenging tailings; the lead primary scavenging concentrate returns to the previous stage operation;
(9) Adding 10g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead primary scavenging tailings, stirring, and then carrying out lead secondary scavenging to obtain lead secondary scavenging concentrate and lead secondary scavenging tailings; the lead secondary scavenging concentrate returns to the previous stage operation;
(10) Adding 2g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead secondary scavenging tailings, stirring, and then carrying out lead tertiary scavenging to obtain lead tertiary scavenging concentrate and lead tertiary scavenging tailings; the lead three-time scavenging concentrate returns to the previous stage operation;
(11) Adding 300g/t lime and 150g/t zinc sulfate into the lead roughing concentrate, stirring, and carrying out primary lead concentration to obtain primary lead concentration concentrate and primary lead concentration tailings; the lead primary tailings are returned to the previous stage of operation;
(12) Adding 100g/t lime and 50g/t zinc sulfate into the primary lead concentrate, stirring, and performing secondary lead concentration to obtain secondary lead concentrate and secondary lead tailings, wherein the secondary lead tailings return to the previous stage; the obtained secondary lead concentrate is lead concentrate;
(13) The obtained lead tertiary scavenging tailings are lead tailings, and the lead tailings are subjected to conventional zinc flotation, so that a zinc concentrate product can be obtained.
In the embodiment, a beneficiation process of lead flotation after preferential arsenic flotation is adopted, the grade of lead in the obtained lead concentrate product is 66.25%, the content of arsenic is 0.35% and is lower than 0.4%, and the arsenic is not out of standard.
This example also obtained an arsenic concentrate product containing 5.10% arsenic.
Example 2
The process shown in figure 1 is adopted to treat the raw ore of the arsenical lead zinc ore, the raw ore contains 5.39 percent of lead, 0.28 percent of arsenic and 86.77 percent of lead sulfide, and the arsenic mainly exists in the form of gray sulfur, arsenic and lead ore. The flotation process is as follows:
(1) Grinding the raw ore to the grinding fineness of-0.075 mm accounting for 68.95%;
(2) Adding the ground ore pulp into a flotation machine, adding 1800g/t Tf, stirring, adding 8g/t nigrosine and 13g/t modified ethionine, and carrying out arsenic roughing to obtain arsenic roughing concentrate and arsenic roughing tailings;
(3) Adding 3g/t of nigrosine and 6g/t of modified ethyl thiourethane into the arsenic roughing tailings, stirring, and then carrying out primary arsenic scavenging to obtain primary arsenic scavenging concentrate and primary arsenic scavenging tailings; the arsenic primary scavenging concentrate returns to the previous operation;
(4) Adding 1g/t of nigrosine and 2g/t of modified ethyl thiourethane into the arsenic primary scavenging tailings, stirring, and then carrying out arsenic secondary scavenging to obtain arsenic secondary scavenging concentrate and arsenic secondary scavenging tailings; the arsenic secondary scavenging concentrate returns to the previous operation;
(5) Adding 130g/t Tf into the arsenic roughing concentrate, stirring, and carrying out primary arsenic concentration to obtain primary arsenic concentration concentrate and primary arsenic concentration tailings; the arsenic primary tailings are subjected to concentration and returned to the previous operation;
(6) Adding 60g/t Tf into the arsenic primary concentrate, stirring, and carrying out arsenic secondary concentration to obtain arsenic secondary concentrate and arsenic secondary tailings; the arsenic secondary concentrating tailings are returned to the previous operation; arsenic secondary concentrate is arsenic concentrate;
(7) 2100g/t lime, 1600g/t zinc sulfate, 55g/t ethionine, 35g/t butylamine black drug and 10g/t 2 are added into the arsenic secondary scavenger tailings # Oil is subjected to lead roughing, and lead roughing concentrate and lead roughing tailings are obtained;
(8) Adding 30g/t of ethion nitrogen and 15g/t of butylamine black drug into the lead roughing tailings, stirring, and then carrying out primary lead scavenging to obtain primary lead scavenging concentrate and primary lead scavenging tailings; the lead primary scavenging concentrate returns to the previous operation;
(9) Adding 15g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead primary scavenging tailings, stirring, and then carrying out lead secondary scavenging to obtain lead secondary scavenging concentrate and lead secondary scavenging tailings; the lead secondary scavenging concentrate returns to the previous operation;
(10) Adding 3g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead secondary scavenging tailings, stirring, and then carrying out lead tertiary scavenging to obtain lead tertiary scavenging concentrate and lead tertiary scavenging tailings; the lead three-time scavenging concentrate returns to the previous operation;
(11) Adding 320g/t lime and 180g/t zinc sulfate into the lead roughing concentrate, stirring, and carrying out primary lead concentration to obtain lead primary concentrate and lead primary tailings; the lead primary tailings are returned to the previous operation;
(12) 110g/t lime and 60g/t zinc sulfate are added into the primary lead concentrate, and secondary lead concentration is carried out after stirring, so as to obtain secondary lead concentrate and secondary lead tailings; the lead secondary concentrating tailings return to the previous operation, and the lead secondary concentrating concentrate is lead concentrate;
(13) The obtained lead tertiary scavenging tailings are lead tailings, and the lead tailings are subjected to conventional zinc flotation, so that a zinc concentrate product can be obtained.
In the embodiment, a beneficiation process of lead flotation after preferential arsenic flotation is adopted, the grade of lead in the obtained lead concentrate product is 68.39%, the content of arsenic is 0.37% and is lower than 0.4%, and the arsenic is not out of standard.
This example also obtained an arsenic concentrate product containing 4.88% arsenic.
Example 3
The process shown in figure 1 is adopted to treat the raw ore of the arsenical lead zinc ore, the raw ore contains 6.45 percent of lead, 0.33 percent of arsenic and 84.30 percent of lead sulfide, and the arsenic mainly exists in the forms of gray sulfur arsenical lead ore and arsenical lead ore. The flotation process is as follows:
(1) Grinding the raw ore to the grinding fineness of-0.075 mm accounting for 71.05%;
(2) Adding the ground ore pulp into a flotation machine, adding 1600g/t Tf, stirring, adding 8g/t nigrosine and 12g/t modified ethionine, and carrying out arsenic roughing to obtain arsenic roughing concentrate and arsenic roughing tailings;
(3) Adding 3g/t of nigrosine and 4g/t of modified ethyl thiourethane into the arsenic roughing tailings, stirring, and then carrying out primary arsenic scavenging to obtain primary arsenic scavenging concentrate and primary arsenic scavenging tailings; the arsenic primary scavenging concentrate returns to the previous operation;
(4) Adding 2g/t of nigrosine and 2g/t of modified ethyl thiourethane into the arsenic primary scavenging tailings, stirring, and then carrying out arsenic secondary scavenging to obtain arsenic secondary scavenging concentrate and arsenic secondary scavenging tailings; the arsenic secondary scavenging concentrate returns to the previous operation;
(5) Adding 150g/t Tf into the arsenic roughing concentrate, stirring, and carrying out primary arsenic concentration to obtain primary arsenic concentration concentrate and primary arsenic concentration tailings; the arsenic primary tailings are subjected to concentration and returned to the previous operation;
(6) Adding 80g/t Tf into the arsenic primary concentrate, stirring, and carrying out arsenic secondary concentration to obtain arsenic secondary concentrate and arsenic secondary tailings; the arsenic secondary concentrating tailings are returned to the previous operation; the arsenic secondary concentrate is the arsenic concentrate;
(7) 1800g/t lime, 1600g/t zinc sulfate, 70g/t ethionine, 25g/t butylamine black drug and 15g/t 2 are added into the arsenic secondary scavenger tailings # Oil is subjected to lead roughing to obtain lead roughing concentrate and lead roughing tailings;
(8) Adding 20g/t of ethion nitrogen and 20g/t of butylammonium black drug into the lead roughing tailings, stirring, and then carrying out primary lead scavenging to obtain primary lead scavenging concentrate and primary lead scavenging tailings; the lead primary scavenging concentrate returns to the previous operation;
(9) Adding 15g/t of ethion nitrogen and 10g/t of butylammonium black drug into the lead primary scavenging tailings, stirring, and then carrying out lead secondary scavenging to obtain lead secondary scavenging concentrate and lead secondary scavenging tailings; the lead secondary scavenging concentrate returns to the previous operation;
(10) Adding 1g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead secondary scavenging tailings, stirring, and then carrying out lead tertiary scavenging to obtain lead tertiary scavenging concentrate and lead tertiary scavenging tailings; the lead three-time scavenging concentrate returns to the previous operation;
(11) Adding 250g/t lime and 180g/t zinc sulfate into the lead roughing concentrate, stirring, and carrying out primary lead concentration to obtain primary lead concentration concentrate and primary lead concentration tailings; the lead primary tailings are returned to the previous operation;
(12) Adding 120g/t lime and 60g/t zinc sulfate into the primary lead concentrate, stirring, and performing secondary lead concentration to obtain secondary lead concentrate and secondary lead tailings; the lead secondary concentration tailings return to the previous operation; the secondary lead concentrate is lead concentrate;
(13) The obtained lead tertiary scavenging tailings are lead tailings, and the lead tailings are subjected to conventional zinc flotation, so that a zinc concentrate product can be obtained.
In the embodiment, a beneficiation process of lead flotation after preferential arsenic flotation is adopted, the grade of lead in the obtained lead concentrate product is 63.64%, the content of arsenic is 0.34% and is lower than 0.4%, and the arsenic is not out of standard.
This example also obtained an arsenic concentrate product containing 5.25% arsenic.
Comparative example 1
The process flow shown in fig. 2 is adopted to treat the raw ore of the arsenical lead zinc ore, and lead floatation is directly carried out, and the raw ore is the same as in the embodiment 1, and the main difference is that the arsenic floatation process is not preferential. The flotation process is as follows:
(1) Grinding the raw ore to the grinding fineness of-0.075 mm accounting for 70%;
(2) Adding the ground ore pulp into a flotation machine, adding 2500g/t lime, 1600g/t zinc sulfate, 60g/t ethionine, 35g/t butylammonium black drug and 10g/t 2 # Oil is subjected to lead roughing to obtain lead roughing concentrate and lead roughing tailings;
(3) Adding 25g/t of ethion nitrogen and 15g/t of butylamine black drug into the lead roughing tailings, stirring, and then carrying out primary lead scavenging to obtain primary lead scavenging concentrate and primary lead scavenging tailings; the lead primary scavenging concentrate returns to the previous operation;
(4) Adding 10g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead primary scavenging tailings, stirring, and then carrying out lead secondary scavenging to obtain lead secondary scavenging concentrate and lead secondary scavenging tailings; the lead secondary scavenging concentrate returns to the previous operation;
(5) Adding 2g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead secondary scavenging tailings, stirring, and then carrying out lead tertiary scavenging to obtain lead tertiary scavenging concentrate and lead tertiary scavenging tailings; the lead three-time scavenging concentrate returns to the previous operation;
(6) Adding 300g/t lime and 150g/t zinc sulfate into the lead roughing concentrate, stirring, and carrying out primary lead concentration to obtain primary lead concentration concentrate and primary lead concentration tailings; the lead primary tailings are returned to the previous operation;
(7) Adding 100g/t lime and 50g/t zinc sulfate into the primary lead concentrate, stirring, and performing secondary lead concentration to obtain secondary lead concentrate and secondary lead tailings; and returning the lead secondary concentration tailings to the previous operation.
And the secondary lead concentrate is lead concentrate. The grade of lead in the obtained lead concentrate is 61.21%, wherein the arsenic content is 0.48%, and the arsenic exceeds the standard.
Comparative example 2
The process flow shown in fig. 2 is adopted to treat the raw ore of the arsenical lead zinc ore, and lead floatation is directly carried out, and the raw ore is the same as in the embodiment 2, and the main difference is that the arsenic floatation process is not preferential. The flotation process is as follows:
(1) Grinding the raw ore to the grinding fineness of-0.075 mm accounting for 68.95%;
(2) Adding the ground ore pulp into a flotation machine, adding 2300g/t lime, 1800g/t zinc sulfate, 65g/t ethionine, 30g/t butylammonium black drug and 10g/t 2 # Oil is subjected to lead roughing to obtain lead roughing concentrate and lead roughing tailings;
(3) Adding 30g/t of ethion nitrogen and 15g/t of butylamine black drug into the lead roughing tailings, stirring, and then carrying out primary lead scavenging to obtain primary lead scavenging concentrate and primary lead scavenging tailings; the lead primary scavenging concentrate returns to the previous operation;
(4) Adding 15g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead primary scavenging tailings, stirring, and then carrying out lead secondary scavenging to obtain lead secondary scavenging concentrate and lead secondary scavenging tailings; the lead secondary scavenging concentrate returns to the previous operation;
(5) Adding 3g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead secondary scavenging tailings, stirring, and then carrying out lead tertiary scavenging to obtain lead tertiary scavenging concentrate and lead tertiary scavenging tailings; the lead three-time scavenging concentrate returns to the previous operation;
(6) Adding 320g/t lime and 180g/t zinc sulfate into the lead roughing concentrate, stirring, and carrying out primary lead concentration to obtain lead primary concentrate and lead primary tailings; the lead primary tailings are returned to the previous operation;
(7) 110g/t lime and 60g/t zinc sulfate are added into the primary lead concentrate, and secondary lead concentration is carried out after stirring, so as to obtain secondary lead concentrate and secondary lead tailings; and returning the lead secondary concentration tailings to the previous operation.
The secondary lead concentrate is lead concentrate, the grade of lead in the obtained lead concentrate is 64.21%, the arsenic content is 0.50%, and the arsenic exceeds the standard.
Comparative example 3
The process flow shown in fig. 2 is adopted to treat the raw ore of the arsenical lead zinc ore, and lead floatation is directly carried out, and the raw ore is the same as in the embodiment 3, and the main difference is that the arsenic floatation process is not preferential. The flotation process is as follows:
(1) Grinding the raw ore to the grinding fineness of-0.075 mm accounting for 71.05%;
(2) Adding the ground ore pulp into a flotation machine, adding 1700g/t lime, 1500g/t zinc sulfate, 65g/t ethionine, 30g/t butylammonium black drug and 15g/t 2 # Oil is subjected to lead roughing to obtain lead roughing concentrate and lead roughing tailings;
(3) Adding 20g/t of ethion nitrogen and 20g/t of butylammonium black drug into the lead roughing tailings, stirring, and then carrying out primary lead scavenging to obtain primary lead scavenging concentrate and primary lead scavenging tailings; the lead primary scavenging concentrate returns to the previous operation;
(4) Adding 15g/t of ethion nitrogen and 10g/t of butylammonium black drug into the lead primary scavenging tailings, stirring, and then carrying out lead secondary scavenging to obtain lead secondary scavenging concentrate and lead secondary scavenging tailings; the lead secondary scavenging concentrate returns to the previous operation;
(5) Adding 1g/t of ethion nitrogen and 5g/t of butylammonium black drug into the lead secondary scavenging tailings, stirring, and then carrying out lead tertiary scavenging to obtain lead tertiary scavenging concentrate and lead tertiary scavenging tailings; the lead three-time scavenging concentrate returns to the previous operation;
(6) Adding 250g/t lime and 180g/t zinc sulfate into the lead roughing concentrate, stirring, and carrying out primary lead concentration to obtain primary lead concentration concentrate and primary lead concentration tailings; the lead primary tailings are returned to the previous operation;
(7) Adding 120g/t lime and 60g/t zinc sulfate into the primary lead concentrate, stirring, and performing secondary lead concentration to obtain secondary lead concentrate and secondary lead tailings; and returning the lead secondary concentration tailings to the previous operation.
The secondary lead concentrate is lead concentrate, the grade of lead in the obtained lead concentrate is 61.04%, the arsenic content is 0.52%, and the arsenic exceeds standard.
The lead concentrates obtained in comparative examples 1-3 all had the problem of arsenic exceeding, and arsenic reduction treatment was necessary to obtain satisfactory lead concentrates. In the subsequent arsenic reduction treatment, the lead concentrate contains more flotation reagents, so that the lead concentrate needs to be subjected to reagent removal and then arsenic reduction treatment. The problems of large dosage of the medicament and poor arsenic reduction and separation effect exist.
Examples 1-3 the lead flotation method after preferential arsenic flotation is adopted, and for complex minerals containing arsenic, lead and zinc ores of ash sulfur arsenic and lead ore minerals, the mineral separation method provided by the invention can stably reduce the content of harmful impurity arsenic in lead concentrate, and lead concentrate products with arsenic content lower than 0.4% can be obtained.
While the invention has been described in detail in the foregoing general description, embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (8)
1. An arsenic-containing lead-zinc ore dressing method, which is characterized in that the arsenic-containing lead-zinc ore contains gray sulfur arsenic lead ore, and comprises the following steps: grinding the arsenic-containing lead-zinc ore into ore pulp, carrying out arsenic flotation to obtain arsenic concentrate, and carrying out lead flotation to obtain lead concentrate;
the arsenic flotation comprises one-time arsenic roughing, 1-2 times of carefully selecting and 1-2 times of scavenging, wherein the agents adopted in the arsenic roughing are a combined inhibitor, an aniline black and modified ethionine, the dosage of the combined inhibitor is 1000-2500 g/t based on the raw mineral mass of arsenical lead zinc ore, the dosage of the aniline black is 5-50 g/t, and the dosage of the modified ethionine is 10-50 g/t;
the first carefully chosen medicament is a combined inhibitor, and the dosage of the combined inhibitor is 100-500 g/t based on the mass of the arsenical lead zinc ore raw ore; the medicaments adopted in the second carefully selection are combined inhibitors, and the dosage of the combined inhibitors is 50-100 g/t according to the mass of the arsenical lead zinc ore raw ore;
the medicaments adopted in the first scavenging are nigrosine medicaments and modified ethyl thiourethane, wherein the dosage of the nigrosine medicaments is 2-20 g/t and the dosage of the modified ethyl thiourethane is 4-20 g/t based on the raw mineral mass of arsenical lead zinc ores; the agents adopted in the second scavenging are nigrosine drugs and modified ethyl thiourethane, wherein the dosage of the nigrosine drugs is 1-10 g/t and the dosage of the modified ethyl thiourethane is 1-10 g/t based on the raw mineral mass of arsenical lead zinc ores;
the combined inhibitor is a mixture of sodium carbonate, humate, bleaching powder, sodium sulfite and zinc sulfate, and the mass ratio of the sodium carbonate to the humate to the bleaching powder to the sodium sulfite to the zinc sulfate in the combined inhibitor is (15-25): 5-10): 10-20): 20-30): 30-50;
the modified ethyl thiourethane is a mixture of ethyl thiourethane and diesel oil, and the ethyl thiourethane and the diesel oil are mixed according to the mass ratio of 1 (2-4).
2. The method of beneficiation of arsenical lead zinc ore of claim 1, wherein the arsenic flotation comprises one arsenic rougher, 2 beneficiations and 2 scavenger.
3. The method of beneficiation of arsenical lead zincite of claim 1 or 2, wherein the lead flotation comprises one lead roughing, at least one beneficiation and at least one scavenger; the medicament adopted by lead roughing comprises lime, zinc sulfate, ethionazole, butylammonium black medicine and No. 2 oil; the medicaments adopted by the selection comprise lime and zinc sulfate; the agent adopted in the scavenging comprises ethionamide and butylammonium black medicine.
4. A method of beneficiating arsenical lead zincite as claimed in claim 3, wherein the lead flotation comprises one lead rougher, 1-2 beneficiations and 1-3 scavenger.
5. The method of beneficiation of arsenical lead zinc ores of claim 4, wherein the lead flotation comprises one lead rougher, 2 beneficiations and 3 sweeps.
6. The method for beneficiating arsenical lead-zinc ore according to claim 4 or 5, wherein the agents adopted in the lead roughing are lime, zinc sulfate, ethionamide, butylammonium black medicine and No. 2 oil; the dosages of the lime, the zinc sulfate, the ethionamide, the butylamine black drug and the No. 2 oil are respectively 1000-5000 g/t, 1000-2000 g/t, 40-100 g/t, 20-50 g/t and 5-30g/t according to the mass of the arsenicum lead zinc ore raw ore;
the medicaments adopted in the first selection are lime and zinc sulfate, and the dosage of the lime and the zinc sulfate is respectively 200-500 g/t and 100-200 g/t according to the mass of the arsenical lead zinc ore raw ore; the agents adopted in the second concentration are lime and zinc sulfate, and the dosage of the lime and the zinc sulfate is 100-200 g/t and 50-100 g/t respectively according to the raw mineral mass of the arsenicum lead zinc ore;
the preparation adopted in the first scavenging is ethionine and butylammonium black drug, and the dosage of the ethionine and the butylammonium black drug is respectively 20-50 g/t and 10-25 g/t according to the mass of the arsenicum lead zinc ore raw ore;
the agents adopted in the second scavenging are ethionine and butylammonium black drugs, and the dosage of the ethionine and the butylammonium black drugs is respectively 10-25 g/t and 5-15 g/t according to the mass of the arsenicum lead zinc ore raw ore; the agents adopted in the third scavenging are ethionine and butylammonium black drugs, and the dosage of the ethionine and the butylammonium black drugs is 1-10 g/t and 1-10 g/t respectively according to the mass of the arsenicum lead zinc ore raw ore.
7. The method for beneficiation of arsenical lead zinc ore according to claim 1, wherein the fineness of the arsenical lead zinc ore grinding is-0.075 mm and 65-85%.
8. The method of beneficiation of arsenical lead zinc ore according to claim 7, wherein the arsenic content of the lead concentrate is less than 0.4%.
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