CN114950723B - Method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ore - Google Patents
Method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ore Download PDFInfo
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 93
- 239000004332 silver Substances 0.000 title claims abstract description 93
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 91
- 239000010937 tungsten Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000012141 concentrate Substances 0.000 claims abstract description 87
- 238000005188 flotation Methods 0.000 claims abstract description 53
- 238000007885 magnetic separation Methods 0.000 claims abstract description 26
- 239000003814 drug Substances 0.000 claims abstract description 13
- 230000005291 magnetic effect Effects 0.000 claims description 97
- 229910052952 pyrrhotite Inorganic materials 0.000 claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000007667 floating Methods 0.000 claims description 18
- 230000002000 scavenging effect Effects 0.000 claims description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- -1 ethionine propynyl ester Chemical class 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 239000012188 paraffin wax Substances 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 229940079593 drug Drugs 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- 239000000344 soap Substances 0.000 claims description 5
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical compound CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 2
- 238000010408 sweeping Methods 0.000 claims 2
- 230000005294 ferromagnetic effect Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 18
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 18
- 229910052500 inorganic mineral Inorganic materials 0.000 description 14
- 239000011707 mineral Substances 0.000 description 14
- 239000006148 magnetic separator Substances 0.000 description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 11
- 239000011593 sulfur Substances 0.000 description 11
- 229910052717 sulfur Inorganic materials 0.000 description 11
- 239000003153 chemical reaction reagent Substances 0.000 description 10
- 229910052946 acanthite Inorganic materials 0.000 description 9
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 9
- 229940056910 silver sulfide Drugs 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 8
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 description 6
- DSCFFEYYQKSRSV-UHFFFAOYSA-N 1L-O1-methyl-muco-inositol Natural products COC1C(O)C(O)C(O)C(O)C1O DSCFFEYYQKSRSV-UHFFFAOYSA-N 0.000 description 4
- VJXUJFAZXQOXMJ-UHFFFAOYSA-N D-1-O-Methyl-muco-inositol Natural products CC12C(OC)(C)OC(C)(C)C2CC(=O)C(C23OC2C(=O)O2)(C)C1CCC3(C)C2C=1C=COC=1 VJXUJFAZXQOXMJ-UHFFFAOYSA-N 0.000 description 4
- DSCFFEYYQKSRSV-KLJZZCKASA-N D-pinitol Chemical compound CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@H]1O DSCFFEYYQKSRSV-KLJZZCKASA-N 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- ZXOKVTWPEIAYAB-UHFFFAOYSA-N dioxido(oxo)tungsten Chemical compound [O-][W]([O-])=O ZXOKVTWPEIAYAB-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004088 foaming agent Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 229910052911 sodium silicate Inorganic materials 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 239000011028 pyrite Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910052979 sodium sulfide Inorganic materials 0.000 description 3
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 3
- CONMNFZLRNYHIQ-UHFFFAOYSA-N 3-methylbutoxymethanedithioic acid Chemical compound CC(C)CCOC(S)=S CONMNFZLRNYHIQ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002223 garnet Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- UYKQQBUWKSHMIM-UHFFFAOYSA-N silver tungsten Chemical compound [Ag][W][W] UYKQQBUWKSHMIM-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000006246 high-intensity magnetic separator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052611 pyroxene Inorganic materials 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ores. The method comprises the steps of raw ore grinding, low-intensity magnetic separation, silver flotation, high-intensity magnetic separation and tungsten flotation. The method can realize the efficient enrichment and comprehensive recovery of useful components in the silver-containing tungsten multi-metal ore, and finally can obtain silver concentrate and tungsten concentrate, and has the advantages of short flow, low dosage of medicament and advanced index.
Description
Technical Field
The invention relates to the technical field of mineral separation, in particular to a method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ores.
Technical Field
Silver is a noble metal, is widely used in jewelry, vessels, religious letters, medicines and the like, has strong conductivity, ductility, heat transfer property and oxidizing property, and is widely used in electronic industry and parts of power generation equipment. Tungsten is a metal with extremely high melting point, high hardness, good high-temperature strength, high tensile strength, better electrical conductivity and thermal conductivity than any metal, low heat dissipation coefficient, and high chemical stability and corrosion resistance. Silver has stronger sulfur affinity, often exists in the form of silver sulfide in the ore forming process, and is often symbiotic with sulphide ores such as pyrrhotite, pyrite and the like, and valuable elements such as tungsten and the like are often symbiotic in silver ores, so that silver-tungsten symbiotic ores are formed. Although the tungsten mineral is various, the tungsten mineral with recovery meaning is mainly wolframite and scheelite, the reserve of scheelite is far greater than that of wolframite, and the wolframite has the advantages of good crystallization, coarse granularity, high specific gravity, deep color and luster, easy separation, and is the earliest tungsten mineral which is developed and utilized, however, the amount of the wolframite is small after long-term large-scale development and utilization. In contrast, scheelite has fine cloth embedding granularity, low specific gravity, light color and luster and high dressing and smelting difficulty, but scheelite is mainly developed and utilized tungsten mineral along with the progress of dressing and smelting technology. Tungsten ore in the silver-tungsten intergrowth ore is mainly scheelite, has the characteristics of more valuable elements, complex properties and the like, is difficult to develop and utilize, and has low ore dressing index and a large amount of precious resources lost in tailings due to lack of reasonable technology.
Research has been reported on the recovery technology of scheelite. Gao Zhanwei et al (Gao Zhanwei et al, scheelite normal temperature flotation test research [ J ] China tungsten industry, 2010 (06): 18-20) conducting scheelite flotation research on the flotation molybdenum tailings in Luanchuan area, under the condition that the grade of raw ores is about 0.062%, obtaining tungsten rough concentrate through normal temperature roughing, obtaining scheelite concentrate through improved 'Peterlov method' heating and concentrating, and obtaining scheelite concentrate through closed circuit test, wherein the grade of WO 3 is 22.56%, and the recovery rate is 83.02%. Wu Haiyan et al (Wu Haiyan et al. Application of novel collector ZL in scheelite flotation [ J ] China tungsten industry, 2019 (05): 25-30) performed systematic collector flotation exploration test for scheelite in Jiangxi, scheelite flotation using sodium carbonate as regulator, sodium silicate as inhibitor, ZL as collector, and closed flotation test for the ore to obtain scheelite concentrate containing WO 3 66.80.80% and recovery rate 88.49%. Liang Youwei (Liang Youwei. Research on mineral comprehensive utilization of scheelite beneficiation test in Guizhou, 2010 (02): 3-6) is researched for a certain ore in Guizhou, and finally, a floating-gravity combined process is adopted, so that two products of WO 3 74.39%, 32.28% WO 3 40.51% and 52.74% of recovery rate can be obtained. The patent with the name of scheelite flotation method discloses that a composition of lignocellulose intercalation modified montmorillonite and carboxymethyl cellulose with the mass ratio of 70:30-85:15 is selected as an inhibitor, when the addition amount of the inhibitor is 300-500 g/t, flotation can be realized at normal temperature, and the recovery rate and grade of the obtained concentrate are obviously improved compared with the flotation method with water glass as the inhibitor. However, a method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ores is not reported in the literature of mineral dressing comprehensive recovery technology at present.
Disclosure of Invention
The invention aims to overcome the defects or the shortcomings of the prior art and provides a method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ores. The method can realize the efficient enrichment and comprehensive recovery of useful components in the silver-containing tungsten multi-metal ore, and finally can obtain silver concentrate and tungsten concentrate, and has the advantages of short flow, low dosage of medicament and advanced index.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ores comprises the following steps:
S1, grinding raw ores: grinding the raw ore until the raw ore is 0.074mm accounting for 60% -85%;
s2, carrying out weak magnetic separation: carrying out low-intensity magnetic separation on the product after ore grinding to obtain pyrrhotite concentrate and low-intensity magnetic tailings;
S3, silver floatation: concentrating the weak magnetic tailings to 25% -35% of pulp concentration, adding 500-1000 g/t of regulator and 50-120 g/t of collector according to the weight of ore feeding, and performing roughing; then adding 15 g/t-50 g/t of collecting agent for scavenging; adding 200 g/t-800 g/t of regulator, and carrying out secondary to tertiary concentration to obtain silver concentrate and floating silver tailings;
s4, strong magnetic separation: carrying out strong magnetic roughing on the floating silver tailings to obtain strong magnetic roughing tailings and strong magnetic roughing concentrate;
carrying out strong magnetic concentration on the strong magnetic roughing concentrate to obtain strong magnetic concentration tailings and a strong magnetic product;
S5, tungsten flotation: combining the strong magnetic tailings and the strong magnetic tailings into strong magnetic tailings, concentrating to 25-35% of pulp concentration, adding 500-1000 g/t of regulator A, 2000-4000 g/t of regulator B, stirring, 100-300 g/t of collector, and stirring for roughing; adding 30 g/t-60 g/t of collecting agent for scavenging; adding 100 g/t-800 g/t of regulator B, and carrying out concentration for four to six times to obtain tungsten concentrate and floating tungsten tailings; the regulator A is one or two of sodium carbonate or sodium hydroxide; the regulator B is water glass.
The silver-containing tungsten polymetallic ore is characterized by multiple valuable element types, complex gangue composition, weak magnetic siliceous gangue minerals, non-magnetic calcareous gangue minerals, and strong magnetic pyrrhotite. The silver ore and scheelite have small mineral amount, and in order to obtain high-grade silver ore concentrate and scheelite concentrate, the strong magnetic pyrrhotite and the weak magnetic siliceous gangue are removed in advance by adopting a reasonable process flow, and the calcareous gangue mineral is inhibited by adopting a reasonable process flow and a medicament system. Therefore, the effective recovery of silver and tungsten from silver-containing tungsten polymetallic ores places high demands on the combination of beneficiation processes and beneficiation reagents.
The inventor of the invention provides a beneficiation method of silver-containing tungsten polymetallic ore, combines the special properties of the silver-containing tungsten polymetallic ore, adopts the process flows of combining weak magnetic separation, silver sulfide flotation, strong magnetic separation and scheelite flotation, and effectively recovers silver and tungsten in the ore.
Specifically, the pyrrhotite with great floatability difference and excellent floatability easily enters silver concentrate in the excellent floatation process of silver sulfide, so that the grade and recovery rate of the silver concentrate are low, the pyrrhotite with extremely poor floatability is difficult to effectively remove in floatation, the subsequent scheelite floatation is extremely adversely affected, the sulfur of the scheelite concentrate is super-standard, the grade is low, and the concentrate is unqualified. The magnetic difference of the pyrrhotite is also very large, most of the pyrrhotite has strong magnetism, and a small part of the pyrrhotite has weak magnetism, and the pyrrhotite with strong magnetism is removed in advance by adopting weak magnetic separation aiming at the characteristic of the pyrrhotite, so that the adverse effect of the pyrrhotite on silver sulfide flotation is effectively avoided. The silver sulfide mineral has good floatability, and can be subjected to preferential floatation of silver sulfide to the tailings of the weak magnetic separation pyrrhotite so as to obtain silver concentrate. The maggot tailings contain weak-magnetic gangue minerals such as maggot and garnet, and weak-magnetic gangue minerals such as pyroxene and garnet, which can be effectively removed by adopting strong magnetic separation, thereby not only effectively avoiding adverse effects of the maggot on tungsten flotation, but also greatly reducing the feeding amount of tungsten flotation and improving the feeding grade of tungsten flotation. The strong magnetic separation tailings adopt sodium silicate and the like as regulators, are stirred, effectively inhibit calcium-containing gangue such as calcite, fluorite and the like, and realize scheelite flotation under normal temperature conditions to obtain tungsten concentrate. The method adopts a process of combining weak magnetic separation and strong magnetic separation, effectively solves the problems that the magnetic pyrite with huge floatability difference and large magnetic difference in the silver-containing tungsten polymetallic ore has interference to silver flotation, and avoids the interference to scheelite flotation caused by the magnetic pyrite and weak magnetic gangue minerals, thereby obtaining high-grade silver concentrate and qualified scheelite concentrate.
From the above, the method can realize the efficient enrichment and comprehensive recovery of useful components in the silver-containing tungsten polymetallic ore, and finally can obtain silver concentrate and tungsten concentrate, and has the advantages of short flow, low dosage of medicament and advanced index.
Preferably, the magnetic field intensity of the weak magnetic separation in S2 is 0.15T-0.45T
Preferably, in S2, the weak magnetic separation is performed by using a weak magnetic separator.
Preferably, the regulator in the coarse selection of S3 is one or both of sodium carbonate and sodium hydroxide.
Preferably, the collector in the coarse selection of the S3 is one or more of Z200, butylammonium black drug, ethionazole, butyl xanthate, isopentyl xanthate or isopentyl xanthate propylene ester.
Preferably, the roughing process in S3 is: concentrating the weak magnetic tailings to 25% -35% of pulp concentration, adding 500-1000 g/t of regulator according to the weight of ore feeding, and stirring for 2-3 minutes; then 50 g/t-120 g/t of collecting agent is added, and the mixture is stirred for 1 to 2 minutes for roughing.
Preferably, the process of the scavenging in S3 is: adding 10 g/t-30 g/t of collecting agent, and performing one-time scavenging; then adding 5 g/t-20 g/t of collecting agent for secondary scavenging.
Preferably, the collector in the S3 scavenging is one or more of Z200, butylammonium black drug, ethionazole, butyl xanthate, isopentyl xanthate or isopentyl xanthate propylene ester.
Preferably, in S4, the high intensity magnetic separation is performed by using a high intensity magnetic separator.
Preferably, the strong magnetism of S4 is roughly selected, and the magnetic field intensity is 0.6T-0.8T.
Preferably, in the strong magnetic refining of S4, the magnetic field strength is 0.5T-0.7T.
Preferably, the roughing process in S5 is: adding 500 g/t-1000 g/t of regulator A, 2000 g/t-4000 g/t of regulator B, stirring for 8 min-20 min, 100 g/t-300 g/t of collector, stirring for 2 min-4 min, and roughing.
Preferably, the process of the scavenging in S5 is: adding 20 g/t-40 g/t of collecting agent, and performing one-time scavenging; then adding 10 g/t-20 g/t of collecting agent for secondary scavenging.
Preferably, the collector in the S5 scavenger is one or both of oxidized paraffin soap and sulfonated oxidized paraffin.
Preferably, the raw ore is a silver-containing tungsten polymetallic ore.
Compared with the prior art, the invention has the following beneficial effects:
The method can realize the efficient enrichment and comprehensive recovery of useful components in the silver-containing tungsten multi-metal ore, and finally can obtain silver concentrate and tungsten concentrate, and has the advantages of short flow, low dosage of medicament and advanced index.
Drawings
Fig. 1 is a process flow diagram of example 1.
Detailed Description
The invention is further illustrated below with reference to examples. These examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. The experimental procedures in the examples below, without specific details, are generally performed under conditions conventional in the art or recommended by the manufacturer; the raw materials, reagents and the like used, unless otherwise specified, are those commercially available from conventional markets and the like. Any insubstantial changes and substitutions made by those skilled in the art in light of the above teachings are intended to be within the scope of the invention as claimed.
Example 1
The mineral separation method of the silver-containing tungsten polymetallic ore comprises the following steps:
s1, grinding raw ore until the raw ore reaches-0.074 mm accounting for 60%;
S2, feeding the product after ore grinding into a weak magnetic separator for weak magnetic separation, and adjusting the magnetic field strength to 0.15T to obtain pyrrhotite concentrate and weak magnetic tailings;
s3, concentrating the weak magnetic tailings to the concentration of 35% of ore pulp, and adding a silver flotation reagent to perform silver flotation to obtain silver concentrate and silver flotation tailings;
S4, feeding the floating silver tailings into a high-gradient strong magnetic separator for strong magnetic roughing, regulating the magnetic field intensity to be 0.8T, obtaining strong magnetic rough concentrate and strong magnetic roughing tailings, feeding the strong magnetic rough concentrate into the high-gradient strong magnetic separator for strong magnetic concentration, and regulating the magnetic field intensity to be 0.7T, thus obtaining strong magnetic products and strong magnetic concentration tailings;
S5, combining and concentrating the strong magnetic roughing tailings and the strong magnetic concentrating tailings to the concentration of ore pulp of 35%, adding a tungsten flotation reagent, and performing scheelite flotation to obtain tungsten concentrate and tungsten flotation tailings.
The specific agent use cases are shown in table 1. The ore feeding is a tungsten polymetallic ore containing silver in Jiangxi, and specific indexes are shown in Table 6.
Example 2
A beneficiation method for silver-containing tungsten polymetallic ores comprises the following steps:
S1, grinding raw ore until the raw ore is 0.074mm accounting for 85%;
s2, feeding the product after ore grinding into a weak magnetic separator for weak magnetic separation, and adjusting the magnetic field strength to be 0.45T to obtain pyrrhotite concentrate and weak magnetic tailings;
s3, concentrating the weak magnetic tailings to the concentration of 25% of ore pulp, and adding a silver flotation reagent to perform silver flotation to obtain silver concentrate and silver flotation tailings;
S4, feeding the floating silver tailings into a high-gradient strong magnetic separator for strong magnetic roughing, regulating the magnetic field intensity to be 0.6T to obtain strong magnetic rough concentrate and strong magnetic roughing tailings, feeding the strong magnetic rough concentrate into the high-gradient strong magnetic separator for strong magnetic roughing, and regulating the magnetic field intensity to be 0.5T to obtain a strong magnetic product and strong magnetic roughing tailings;
S5, combining and concentrating the strong magnetic roughing tailings and the strong magnetic concentrating tailings to the pulp concentration of 25%, adding a tungsten flotation reagent, and performing scheelite flotation to obtain tungsten concentrate and tungsten flotation tailings.
The specific agent use cases are shown in table 1. The ore feeding is tungsten polymetallic ore containing silver in inner Mongolia, and specific indexes are shown in Table 6.
Example 3
A beneficiation method for silver-containing tungsten polymetallic ores comprises the following steps:
s1, grinding raw ore until the raw ore is 0.074mm accounting for 75%;
S2, feeding the product after ore grinding into a weak magnetic separator for weak magnetic separation, and adjusting the magnetic field strength to be 0.35T to obtain pyrrhotite concentrate and weak magnetic tailings;
S3, concentrating the weak magnetic tailings to 30% of the concentration of the ore pulp, and adding a silver flotation reagent to perform silver flotation to obtain silver concentrate and silver flotation tailings;
S4, feeding the floating silver tailings into a high-gradient strong magnetic separator for strong magnetic roughing, regulating the magnetic field intensity to be 0.7T to obtain strong magnetic rough concentrate and strong magnetic roughing tailings, feeding the strong magnetic rough concentrate into the high-gradient strong magnetic separator for strong magnetic roughing, and regulating the magnetic field intensity to be 0.6T to obtain a strong magnetic product and strong magnetic roughing tailings;
S5, combining and concentrating the strong magnetic roughing tailings and the strong magnetic concentrating tailings to the pulp concentration of 30%, adding a tungsten flotation reagent, and performing scheelite flotation to obtain tungsten concentrate and tungsten flotation tailings.
The specific agent use cases are shown in Table 2. The ore feeding is tungsten polymetallic ore containing silver in inner Mongolia, and specific indexes are shown in Table 6.
Table 1 use of the agents of examples 1 and 2
TABLE 2 pharmaceutical use of example 3
Comparative example 1
The existing beneficiation method of the silver-containing tungsten polymetallic ore comprises the following steps:
s1, grinding raw ore until the raw ore reaches-0.074 mm accounting for 60%;
S2, adding a collecting agent butyl xanthate and a foaming agent pinitol oil into the ground product for mixed flotation to obtain sulfide ore mixed concentrate and floating sulfur tailings;
s3, adding lime serving as a regulator to inhibit pyrrhotite in the mixed concentrate, and performing silver sulfide flotation to obtain silver concentrate and pyrrhotite concentrate;
s4, adding regulator sodium carbonate and water glass into the floating sulfur tailings to inhibit gangue, and then adding collector oxidized paraffin soap to perform scheelite normal-temperature flotation to obtain scheelite rough concentrate and tungsten flotation tailings;
s5, adding modifier sodium silicate, sodium hydroxide and sodium sulfide into the scheelite rough concentrate to carry out Wen Jingxuan, and obtaining scheelite concentrate and tungsten heating tailings.
The use condition of the specific medicament is shown in table 3, the ore feeding is the same as that of example 1, and the specific index is shown in table 6.
Comparative example 2
The existing beneficiation method of the silver-containing tungsten polymetallic ore comprises the following steps:
S1, grinding raw ore until the raw ore is 0.074mm accounting for 85%;
S2, adding a collecting agent butyl xanthate and a foaming agent pinitol oil into the ground product for mixed flotation to obtain sulfide ore mixed concentrate and floating sulfur tailings;
s3, adding lime serving as a regulator to inhibit pyrrhotite in the mixed concentrate, and performing silver sulfide flotation to obtain silver concentrate and pyrrhotite concentrate;
s4, adding regulator sodium carbonate and water glass into the floating sulfur tailings to inhibit gangue, and then adding collector oxidized paraffin soap to perform scheelite normal-temperature flotation to obtain scheelite rough concentrate and tungsten flotation tailings;
s5, adding modifier sodium silicate, sodium hydroxide and sodium sulfide into the scheelite rough concentrate to carry out Wen Jingxuan, and obtaining scheelite concentrate and tungsten heating tailings.
The use condition of the specific medicament is shown in table 4, the ore feeding is the same as that of example 2, and the specific index is shown in table 6.
Comparative example 3
The existing beneficiation method of the silver-containing tungsten polymetallic ore comprises the following steps:
s1, grinding raw ore until the raw ore is 0.074mm accounting for 75%;
S2, adding a collecting agent butyl xanthate and a foaming agent pinitol oil into the ground product for mixed flotation to obtain sulfide ore mixed concentrate and floating sulfur tailings;
s3, adding lime serving as a regulator to inhibit pyrrhotite in the mixed concentrate, and performing silver sulfide flotation to obtain silver concentrate and pyrrhotite concentrate;
s4, adding regulator sodium carbonate and water glass into the floating sulfur tailings to inhibit gangue, and then adding collector oxidized paraffin soap to perform scheelite normal-temperature flotation to obtain scheelite rough concentrate and tungsten flotation tailings;
s5, adding modifier sodium silicate, sodium hydroxide and sodium sulfide into the scheelite rough concentrate to carry out Wen Jingxuan, and obtaining scheelite concentrate and tungsten heating tailings.
The use condition of the specific medicament is shown in table 5, the ore feeding is the same as that of example 3, and the specific index is shown in table 6.
Comparative example 4
The specific steps of the beneficiation method for the silver-containing tungsten polymetallic ore are basically the same as those of the embodiment 1, except that the step of weak magnetic separation is absent, and the method specifically comprises the following steps:
s1, grinding raw ore until the raw ore reaches-0.074 mm accounting for 60%;
s2, adding a silver flotation reagent into the ground product to perform silver flotation to obtain silver concentrate and silver flotation tailings;
S3, adding the floating silver tailings into a collector butylxanthate and a foaming agent pinitol oil to perform pyrrhotite flotation, so as to obtain pyrrhotite concentrate and floating sulfur tailings;
S4, feeding the floating sulfur tailings into a high-gradient strong magnetic separator for strong magnetic roughing, regulating the magnetic field strength to be 0.8T, obtaining strong magnetic rough concentrate and strong magnetic roughing tailings, feeding the strong magnetic rough concentrate into the high-gradient strong magnetic separator for strong magnetic concentration, and regulating the magnetic field strength to be 0.7T, thus obtaining strong magnetic products and strong magnetic concentration tailings;
S5, combining and concentrating the strong magnetic roughing tailings and the strong magnetic concentrating tailings to the concentration of ore pulp of 35%, adding a tungsten flotation reagent, and performing scheelite flotation to obtain tungsten concentrate and tungsten flotation tailings.
The specific pharmaceutical use cases are shown in Table 1 (same as in example 1). The ore feeding is a tungsten polymetallic ore (same as in example 1) containing silver in Jiangxi, and specific indexes are shown in Table 6.
TABLE 3 pharmaceutical use of comparative example 1
TABLE 4 pharmaceutical use of comparative example 2
TABLE 5 pharmaceutical use of comparative example 3
The results of the selection of each example and comparative example are shown in Table 6.
Table 6 beneficiation indicators for each example and comparative example
From the ore dressing indexes of the above examples and comparative examples, it can be seen that the silver-containing tungsten polymetallic ore is treated by the prior art (sulfur-containing tungsten polymetallic ore dressing technology, comparative examples 1 to 3), the silver concentrate Ag grade obtained reaches 5063g/t at maximum, the recovery rate reaches 80.35%, the tungsten concentrate WO 3 grade reaches 64.09%, and the recovery rate reaches 74.33%.
The index obtained by the method is obviously higher than that obtained by the prior art, and has obvious progress. Specifically, the silver concentrate obtained by the method of the invention in the example 1 has high grade 852g/t and high recovery rate 5.76%, the grade of the tungsten concentrate obtained by the invention is basically the same as that obtained by the prior art (comparative example 1), but the recovery rate of the tungsten concentrate obtained by the invention is 8.10% higher than that obtained by the comparative example 1; the silver concentrate obtained by the method of the invention in example 2 has a high grade of 1553g/t and a recovery rate of 8.15%, and the tungsten concentrate obtained by the method of the invention is basically the same as the tungsten concentrate obtained by the prior art (comparative example 2), but the recovery rate of the tungsten concentrate obtained by the method of the invention is 9.12% higher than that of the tungsten concentrate obtained by the method of the invention in comparative example 2. The grade of the silver concentrate obtained by the method of the invention in example 3 is 271g/t higher, the recovery rate is 4.88%, the grade of the tungsten concentrate obtained by the method of the invention is basically the same as that obtained by the prior art (comparative example 3), but the recovery rate of the tungsten concentrate obtained by the method of the invention is 6.42% higher than that obtained by the method of the invention in comparative example 3. In comparative example 4, the grade of the obtained silver concentrate is 3012g/t due to the lack of the weak magnetic separation of the pyrrhotite, which is greatly reduced by 2396g/t and the silver recovery rate is also reduced by 8.09% compared with the grade 5408g/t of the silver concentrate obtained by adopting the embodiment 1 of the invention, which proves that the adoption of the weak magnetic separation to remove the pyrrhotite in advance is very important for improving the silver sorting index.
While the foregoing is directed to particular illustrative embodiments of the present invention, several modifications and variations may be made by those skilled in the art without departing from the principles of the present invention. Indeed, the scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for comprehensively recovering silver and tungsten from silver-containing tungsten polymetallic ores, which is characterized by comprising the following steps:
S1, grinding raw ores: grinding the raw ore until the raw ore is 0.074mm accounting for 60% -85%;
s2, carrying out weak magnetic separation: carrying out low-intensity magnetic separation on the product after ore grinding to obtain pyrrhotite concentrate and low-intensity magnetic tailings;
S3, silver floatation: concentrating the weak magnetic tailings to 25% -35% of pulp concentration, adding 500-1000 g/t of regulator and 50-120 g/t of collector according to the weight of ore feeding, and performing roughing; then adding 15 g/t-50 g/t of collecting agent for scavenging; adding 200 g/t-800 g/t of regulator, and carrying out secondary to tertiary concentration to obtain silver concentrate and floating silver tailings;
s4, strong magnetic separation: carrying out strong magnetic roughing on the floating silver tailings to obtain strong magnetic roughing tailings and strong magnetic roughing concentrate;
carrying out strong magnetic concentration on the strong magnetic roughing concentrate to obtain strong magnetic concentration tailings and a strong magnetic product;
S5, tungsten flotation: combining the strong magnetic tailings and the strong magnetic tailings into strong magnetic tailings, concentrating to 25-35% of pulp concentration, adding 500-1000 g/t of regulator A, 2000-4000 g/t of regulator B, stirring, 100-300 g/t of collector, and stirring for roughing; adding 30 g/t-60 g/t of collecting agent for scavenging; adding 100 g/t-800 g/t of regulator B, and carrying out concentration for four to six times to obtain tungsten concentrate and floating tungsten tailings; the regulator A is one or two of sodium carbonate or sodium hydroxide; the regulator B is water glass.
2. The method according to claim 1, wherein the weak magnetic separation in S2 has a magnetic field strength of 0.15T to 0.45T.
3. The method according to claim 1, wherein the modifier in the coarse selection of S3 is one or both of sodium carbonate or sodium hydroxide;
S3, roughly selecting one or more of a collector Z200, a butylammonium black drug, ethionine propynyl ester, butyl xanthate propynyl ester, isopentyl xanthate propynyl ester or isopentyl xanthate propylene ester;
the collecting agent in the S3 scavenging is one or more of Z200, butylammonium black drug, ethionine propynyl ester, butyl xanthate propynyl ester, isopentyl xanthate propynyl ester or isopentyl xanthate propylene ester.
4. The method according to claim 1, wherein the roughing in S3 is performed by: concentrating the weak magnetic tailings to 25% -35% of pulp concentration, adding 500-1000 g/t of regulator according to the weight of ore feeding, and stirring for 2-3 minutes; then 50 g/t-120 g/t of collecting agent is added, and the mixture is stirred for 1 to 2 minutes for roughing.
5. The method of claim 1, wherein the step of sweeping in S3 is: adding 10 g/t-30 g/t of collecting agent, and performing one-time scavenging; then adding 5 g/t-20 g/t of collecting agent for secondary scavenging.
6. The method of claim 1, wherein the magnetic field strength is 0.6T to 0.8T in the ferromagnetic coarse selection of S4; in the strong magnetic refining of S4, the magnetic field strength is 0.5T-0.7T.
7. The method according to claim 1, wherein the roughing in S5 is performed by: adding 500 g/t-1000 g/t of regulator A, 2000 g/t-4000 g/t of regulator B, stirring for 8 min-20 min, 100 g/t-300 g/t of collector, stirring for 2 min-4 min, and roughing.
8. The method of claim 1, wherein the step of sweeping in S5 is: adding 20 g/t-40 g/t of collecting agent, and performing one-time scavenging; then adding 10 g/t-20 g/t of collecting agent for secondary scavenging.
9. The method of claim 1, wherein the collector in the sweep of S5 is one or both of oxidized paraffin soap or sulfonated oxidized paraffin.
10. The method of claim 1, wherein the raw ore is a silver-containing tungsten polymetallic ore.
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