CN118106133A - Process method for separating copper, nickel and sulfur from low-grade copper, nickel sulfide ore with high pyrrhotite content - Google Patents
Process method for separating copper, nickel and sulfur from low-grade copper, nickel sulfide ore with high pyrrhotite content Download PDFInfo
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- CN118106133A CN118106133A CN202410522941.5A CN202410522941A CN118106133A CN 118106133 A CN118106133 A CN 118106133A CN 202410522941 A CN202410522941 A CN 202410522941A CN 118106133 A CN118106133 A CN 118106133A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 258
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 129
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 90
- 239000010949 copper Substances 0.000 title claims abstract description 90
- 229910052952 pyrrhotite Inorganic materials 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 35
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000011593 sulfur Substances 0.000 title claims abstract description 32
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title claims abstract description 22
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 title description 3
- 239000012141 concentrate Substances 0.000 claims abstract description 129
- 238000005188 flotation Methods 0.000 claims abstract description 52
- 239000004088 foaming agent Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012190 activator Substances 0.000 claims abstract description 8
- 239000003112 inhibitor Substances 0.000 claims description 82
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical group [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 76
- 239000000292 calcium oxide Substances 0.000 claims description 38
- 235000012255 calcium oxide Nutrition 0.000 claims description 38
- 238000007670 refining Methods 0.000 claims description 29
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 26
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 25
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 25
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 25
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical group CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 claims description 10
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 8
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical group CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 claims description 7
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 7
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 5
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical group [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 5
- 229940079593 drug Drugs 0.000 claims description 5
- QWENMOXLTHDKDL-UHFFFAOYSA-N pentoxymethanedithioic acid Chemical compound CCCCCOC(S)=S QWENMOXLTHDKDL-UHFFFAOYSA-N 0.000 claims description 5
- 125000003158 alcohol group Chemical group 0.000 claims description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 3
- 229920001451 polypropylene glycol Polymers 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 241000872198 Serjania polyphylla Species 0.000 claims 1
- YFLLTMUVNFGTIW-UHFFFAOYSA-N nickel;sulfanylidenecopper Chemical compound [Ni].[Cu]=S YFLLTMUVNFGTIW-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052683 pyrite Inorganic materials 0.000 abstract description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011028 pyrite Substances 0.000 abstract description 2
- 239000002366 mineral element Substances 0.000 abstract 1
- 238000010408 sweeping Methods 0.000 description 18
- 229910000570 Cupronickel Inorganic materials 0.000 description 8
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 238000007885 magnetic separation Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052954 pentlandite Inorganic materials 0.000 description 2
- OJNSBQOHIIYIQN-UHFFFAOYSA-M sodium;bis(2-methylpropyl)-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Na+].CC(C)CP([S-])(=S)CC(C)C OJNSBQOHIIYIQN-UHFFFAOYSA-M 0.000 description 2
- 239000012991 xanthate Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- YNTQKXBRXYIAHM-UHFFFAOYSA-N azanium;butanoate Chemical group [NH4+].CCCC([O-])=O YNTQKXBRXYIAHM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052951 chalcopyrite Inorganic materials 0.000 description 1
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 238000005728 strengthening 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
- 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
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
-
- 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
- B03D1/08—Subsequent treatment of concentrated product
-
- 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
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a process method for separating copper, nickel and sulfur from low-grade copper, nickel and sulfide ores with high pyrrhotite content. The process method comprises the following steps: (1) adding an adjusting agent during ore grinding; (2) Adding a copper collector and a foaming agent into the ore pulp obtained by grinding in the step (1) for floatation; (3) Regrinding the concentrate produced by the flotation in the step (2), and then carrying out concentration to obtain copper concentrate; (4) Adding a nickel activator, a nickel collector and an auxiliary collector into tailings obtained by flotation in the step (2) for flotation; (5) Adding a regulator into the concentrate produced by the flotation in the step (4) and regrinding, and then carrying out concentration to obtain nickel concentrate; (6) And (3) adding a sulfur collector into tailings produced in the flotation in the step (4) for flotation, wherein the produced concentrate is sulfur concentrate. Compared with the prior art, the method can separate the copper concentrate, the nickel concentrate and the sulfur concentrate with higher quality from the low-grade copper-nickel sulfide ore with higher pyrite and pyrrhotite, thereby realizing the full utilization of mineral elements.
Description
Technical Field
The invention belongs to the field of mineral separation, and particularly relates to a process method for separating copper, nickel and sulfur from low-grade copper, nickel and sulfide ores with high pyrrhotite content.
Background
At present, copper-nickel sulfide ore flotation is mainly copper-nickel mixed flotation, and then copper-nickel separation is carried out on the mixed concentrate or high-nickel-copper-nickel separation is carried out after smelting the mixed concentrate. The case of selecting copper and then nickel is not common. In one class of nickel sulphide copper ores, the sulphide of nickel is mainly pentlandite and the sulphide of copper is mainly chalcopyrite, wherein the main sulphur-containing mineral is pyrrhotite, the content of which is far higher than that of nickel copper sulphide. The property of the pyrrhotite is similar to that of the pyrrhotite, the pyrrhotite is easy to collect by the conventional xanthate collector in a floatation way, the quality in the concentrate is low, the pyrrhotite activated by the agent is difficult to separate from the pyrrhotite, and particularly, after the pyrrhotite is circularly enriched in the closed cycle process of floatation, a large amount of pyrrhotite enters the concentrate, so that the quality of the concentrate can be obviously deteriorated, a large amount of lime is often required to be added for restraining the floated pyrrhotite, so that floatation foam is sticky, a pipeline is easy to block and the like.
In chinese patent CN 102319618B, a method for beneficiating copper-nickel sulfide ore with high pyrrhotite content is described, wherein the copper-nickel sulfide ore is first subjected to mixed flotation; copper and nickel are separated after the mixed flotation concentrate is selected to produce copper concentrate and nickel concentrate; and (3) a mixed flotation tailing re-selection procedure. The separation index is that nickel concentrate with the grade of 7.6 percent, the recovery rate of 85.1 percent and copper concentrate with the grade of 26.5 percent and the recovery rate of 54 percent are obtained under the condition that the nickel grade of raw ore is 1.14 percent and the copper grade is 0.3 percent. Under the condition that the raw ore contains higher nickel and reaches more than 1%, the content of nickel concentrate is only 7.6%, which indicates that a large amount of pyrrhotite contained in the concentrate cannot be effectively removed, and the quality of the concentrate is low; the recovery rate of copper is only 54%, and the copper recovery rate index is low.
In chinese patent CN 106583022A, a magnetic separation is adopted, and after one-time medium-strong magnetic separation, regrinding and then weak magnetic separation, pyrrhotite is concentrated in the magnetic separation concentrate to be selected as iron concentrate, a non-magnetic product is regrinded and desliming by a cyclone, the sand setting by the cyclone and the weak magnetic separation tailings are used as ore feeding for copper-nickel mixed flotation, copper-nickel mixed concentrate is produced through flotation, and the overflow of the cyclone and the tailings obtained through flotation are used as total tailings. The method only produces copper-nickel bulk concentrates, but fails to separate copper from nickel, and has the advantages of large dosage of flotation additive agents, high cost, direct tailing discharge due to desliming of the cyclone, loss of fine-grained useful minerals and reduction of concentrate recovery rate.
Disclosure of Invention
The invention aims to solve the problems and provides a process method for separating copper, nickel and sulfur from low-grade copper, nickel and sulfide ores with high pyrrhotite content.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The process method for separating copper, nickel and sulfur from the low-grade copper, nickel and sulfide ore of the high-pyrrhotite is characterized by comprising the following steps of:
(1) Grinding: adding an adjusting agent during ore grinding;
(2) Roughing copper: adding a copper collector and a foaming agent into the ore pulp obtained by grinding in the step (1) for floatation;
(3) Copper selection: regrinding the concentrate produced by the flotation in the step (2), and then carrying out concentration to obtain copper concentrate;
(4) Roughing nickel: adding a nickel activator, a nickel collector and an auxiliary collector into tailings obtained by flotation in the step (2) for flotation;
(5) Nickel selection: adding a regulator into the concentrate produced by the flotation in the step (4) and regrinding, and then carrying out concentration to obtain nickel concentrate;
(6) Sulfur flotation: and (3) adding a sulfur collector into tailings produced in the flotation in the step (4) for flotation, wherein the produced concentrate is sulfur concentrate.
Preferably, in the step (1), grinding is performed until the fineness of the ground lime reaches-200 meshes and 60-70%, wherein the regulator is quicklime, and the dosage is 100-300 g/t.
Preferably, in the step (2), the copper collector is dithiophosphinate, and the dosage is 10-30 g/t.
Preferably, in the step (2), the foaming agent is an alcohol foaming agent, the dosage is 10-30 g/t, and more preferably, the alcohol foaming agent is methyl isobutyl carbinol or methoxy polypropylene glycol.
Preferably, in the step (3), the powder is ground again until the fineness of 325 meshes is 80-90%.
Preferably, in step (3), the beneficiation comprises:
(3a) Adding gangue inhibitor, nickel inhibitor, copper collector and foaming agent into the regrind ore pulp for primary concentration;
(3b) Adding gangue inhibitors and nickel inhibitors into the concentrate produced by primary concentration, and carrying out secondary concentration;
(3c) Carrying out tertiary concentration on the concentrate produced by secondary concentration, wherein the concentrate produced by tertiary concentration is copper concentrate;
(3d) Adding gangue inhibitors and nickel inhibitors into tailings produced by primary concentration, performing primary fine cleaning, returning the produced concentrate to regrinding in the step (3), and combining the produced tailings with ore pulp regrinded in the step (5);
(3e) And (3) adding nickel inhibitor into tailings produced by secondary concentration, performing secondary refining, wherein the produced tailings are nickel concentrate, and combining the produced concentrate with tailings produced by tertiary concentration to return to the secondary concentration in the step (3 b).
More preferably, in the step (3 a), the gangue inhibitor is carboxymethyl cellulose, the dosage is 50-100 g/t, the nickel inhibitor is quicklime, the dosage is 30-80 g/t, the copper collector is dithiophosphinate, the dosage is 1-10 g/t, the foaming agent is an alcohol foaming agent, and the dosage is 1-10 g/t.
More preferably, in the step (3 b), the gangue inhibitors are carboxymethyl cellulose and water glass, the dosage is 5-30 g/t and 10-50 g/t respectively, the nickel inhibitor is quicklime, and the dosage is 10-40 g/t.
More preferably, in the step (3 d), the gangue inhibitor is carboxymethyl cellulose, the dosage is 10-50 g/t, the nickel inhibitor is quicklime, and the dosage is 10-50 g/t.
More preferably, in the step (3 e), the nickel inhibitor is quicklime, and the dosage is 10-40 g/t.
Preferably, in the step (4), the nickel activator is copper sulfate with the dosage of 20-50 g/t, the nickel collector is one or more of ethyl xanthate, butyl xanthate or amyl xanthate with the dosage of 50-100 g/t, and the auxiliary collector is ammonium butyrate with the dosage of 10-30 g/t.
Preferably, in the step (5), the mixture is ground to the fineness of-325 meshes accounting for 70-80%, and the amount of the regulator is 100-300 g/t.
Preferably, in step (5), the beneficiation comprises the steps of:
(5a) Adding gangue inhibitors and auxiliary collectors into the regrind ore pulp for primary concentration;
(5b) Adding gangue inhibitors and pyrrhotite inhibitors into the concentrate produced by primary concentration, and carrying out secondary concentration;
(5c) Adding pyrrhotite inhibitor into the concentrate produced by the secondary concentration, and carrying out tertiary concentration, wherein the produced concentrate is nickel concentrate;
(5d) The tailings produced by primary concentration return to the nickel roughing of the step (4), the tailings produced by secondary concentration return to the primary concentration of the step (5 a), and the tailings produced by tertiary concentration return to the secondary concentration of the step (5 c).
More preferably, in the step (5 a), the gangue inhibitor is carboxymethyl cellulose, the dosage is 50-100 g/t, the auxiliary collector is butylammonium black drug, and the dosage is 10-40 g/t.
More preferably, in the step (5 b), the gangue inhibitor is carboxymethyl cellulose, the dosage is 10-30 g/t, and the pyrrhotite inhibitor is quicklime, and the dosage is 50-100 g/t.
More preferably, in the step (5 c), the pyrrhotite inhibitor is quicklime, and the dosage is 50-100 g/t.
Preferably, in the step (6), the sulfur collecting agent is one or more of ethyl xanthate, butyl xanthate and amyl xanthate, and the dosage is 10-50 g/t.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention adopts the process of preferential copper flotation, nickel flotation and final sulfur flotation, regrinding and concentration of the copper rough concentrate, regrinding and strengthening nickel separation of the nickel rough concentrate, can separate copper concentrate and nickel concentrate with higher quality from low-grade copper nickel ore with higher pyrite and pyrrhotite content as smelting raw materials, and can separate pyrrhotite as a vulcanizing agent for subsequent smelting.
2. The invention carries out fine grinding on the rough copper concentrate and the rough nickel concentrate, so that the dissociation degree of useful mineral monomers is improved, and the quality of the separated concentrate is improved.
3. According to the invention, different flotation agents are adopted for copper-nickel roughing, dithiophosphinate which is used for efficiently collecting copper and foaming agent without collecting capacity are adopted for copper roughing, so that the floating of nickel minerals is reduced; and a xanthate collector and a butylammonium black powder auxiliary collector (with foamability) are adopted for nickel flotation, so that nickel recovery is enhanced.
4. CMC, water glass and lime are adopted in a targeted manner for gangue minerals, pyrrhotite and pentlandite respectively; lime is used as inhibitor when copper is selected to inhibit nickel concentrate and nickel is floated to inhibit pyrrhotite, but the floatability difference is utilized, and the optimal inhibition effect is achieved by adjusting the lime consumption and using the least lime consumption.
Drawings
FIG. 1 is a process flow diagram of the separation of copper, nickel and sulfur from the low-grade copper, nickel sulphide ore of high pyrrhotite content of the invention.
Detailed Description
The technical scheme of the invention is further described in detail below by combining examples.
Example 1
The process flow of copper, nickel and sulfur separation of the high-pyrrhotite-containing low-grade copper, nickel and sulfide ore is shown in a figure 1, and comprises the following specific steps:
And 1, grinding. Grinding crushed low-grade copper-nickel sulphide ore with high pyrrhotite content, wherein quicklime (CaO) is added as a regulator during grinding, the dosage is 100g/t, and the grinding fineness is 60 percent of-200 meshes (74 mu m).
And step 2, copper roughing. Copper collector dithiophosphinate (Aerophine 3418A, sodium diisobutyldithiophosphinate) 10g/t and foamer methyl isobutyl carbinol (MIBC) 10g/t were added to the ore pulp obtained from the grinding in step 1 for flotation. The concentrate produced by flotation is blister copper concentrate.
And 3, carefully selecting copper. And (3) regrinding the rough copper concentrate produced in the step (2), wherein the grinding fineness is 80% of that of minus 325 meshes (45 mu m). The regrind pulp is subjected to primary concentration (copper concentration I), and 50g/t of gangue inhibitor carboxymethyl cellulose (CMC), 30g/t of nickel inhibitor quicklime, 1g/t of copper collector dithiophosphinate 3418A and 1g/t of foaming agent MIBC are added during primary concentration. And (3) carrying out primary fine sweeping (copper fine sweeping I) on tailings produced by primary fine sweeping, adding 10g/t of gangue inhibitor CMC and 10g/t of nickel inhibitor quicklime during primary fine sweeping, returning concentrate produced by primary fine sweeping to regrinding, and feeding the produced tailings into a subsequent step (5) of nickel fine sweeping. The concentrate produced by the primary concentration is subjected to secondary concentration (copper concentration II), and gangue inhibitors (CMC 5g/t and water glass 10 g/t) and nickel inhibitors (quicklime 10 g/t) are added during the secondary concentration. And (3) carrying out three-time concentration (copper concentration III) on the concentrate produced by the secondary concentration, wherein the concentrate produced by the three-time concentration is the copper concentrate. And (3) performing secondary refining (copper refining II) on tailings produced by secondary refining, and adding nickel inhibitor (quicklime 10 g/t) during secondary refining, wherein the tailings produced by secondary refining are first nickel concentrate. The tailings produced by the third concentration and the concentrate produced by the second concentration are combined and returned to the second concentration for ore feeding to form closed cycle.
And 4, nickel roughing. And (3) adding 20g/t of nickel activator copper sulfate, 50g/t of nickel collecting agent ethyl xanthate and 10g/t of auxiliary collecting agent butylammonium black powder into tailings obtained by flotation in the step (2) for flotation, wherein concentrate obtained by flotation is coarse nickel concentrate.
And 5, nickel concentration. The coarse nickel concentrate in the step 4 is regrind, the grinding fineness is 70 percent of minus 325 meshes (45 mu m), and the inhibitor quicklime is added for 100g/t during regrind. Combining the regrind ore pulp with tailings produced in the primary refining in the step 3 for primary refining (nickel refining I), and adding 50g/t of gangue inhibitor CMC and 10g/t of auxiliary collector butylammonium black drug during primary refining. The tailings produced by primary concentration are returned to nickel roughing to form closed cycle. And (3) carrying out secondary concentration (nickel concentration II) on the concentrate produced by the primary concentration, wherein 10g/t of CMC (gangue inhibitor) and 50g/t of quicklime (pyrrhotite inhibitor) are added during the secondary concentration. The tailings produced by the secondary concentration return to the primary concentration to form closed cycle. And (3) carrying out three-time concentration (nickel concentration III) on the concentrate produced by the secondary concentration, and adding 50g/t of pyrrhotite inhibitor quicklime during the three-time concentration. Tailings produced by the third concentration are returned to the second concentration for ore feeding to form closed cycle, and concentrate produced by the third concentration is the second nickel concentrate.
And 6, sulfur floatation. And (3) adding 10g/t butyl xanthate into tailings produced in the flotation in the step (4) for sulfur flotation, wherein the produced concentrate is sulfur concentrate, and the tailings are final tailings. The specific results are shown in Table 1.
TABLE 1 various indices of raw ore and concentrate
Example 2
A process method for separating copper, nickel and sulfur from low-grade copper, nickel and sulfide ores with high pyrrhotite content comprises the following steps:
And 1, grinding. Grinding the crushed low-grade copper-nickel sulphide ore with high pyrrhotite content, wherein the grinding fineness is 65% of-200 meshes (74 mu m) when adding 200g/t of quicklime as an adjusting agent.
And step 2, copper roughing. And (3) adding 20g/t of copper collector dithiophosphinate 3418A and 20g/t of foaming agent MIBC into the ore pulp obtained by grinding in the step (1) for floatation. The concentrate produced by flotation is blister copper concentrate.
And 3, carefully selecting copper. And (3) regrinding the rough copper concentrate produced in the step (2), wherein the grinding fineness is 85% of that of minus 325 meshes (45 mu m). The regrind pulp is subjected to primary concentration (copper concentration I), and 70g/t of gangue inhibitor CMC, 50g/t of nickel inhibitor quicklime, 5g/t of copper collector dithiophosphinate 3418A and 5g/t of foaming agent MIBC are added during primary concentration. And (3) carrying out primary fine sweeping (copper fine sweeping I) on tailings produced by primary fine sweeping, adding 30g/t of gangue inhibitor CMC and 20g/t of nickel inhibitor quicklime during primary fine sweeping, returning concentrate produced by primary fine sweeping to regrinding, and feeding the produced tailings into a subsequent step (5) of nickel fine sweeping. The concentrate produced by the primary concentration is subjected to secondary concentration (copper concentration II), and gangue inhibitors (CMC 20g/t and water glass 20 g/t) and nickel inhibitors (quicklime 25 g/t) are added during the secondary concentration. And (3) carrying out three-time concentration (copper concentration III) on the concentrate produced by the secondary concentration, wherein the concentrate produced by the three-time concentration is the copper concentrate. And (3) performing secondary refining (copper refining II) on tailings produced by secondary refining, wherein a nickel inhibitor (quicklime 30 g/t) is added during secondary refining, and the tailings produced by secondary refining are first nickel concentrate. The tailings produced by the third concentration and the concentrate produced by the second concentration are combined and returned to the second concentration for ore feeding to form closed cycle.
And 4, nickel roughing. And (3) adding 30g/t of nickel activator copper sulfate, 70g/t of nickel collecting agent ethyl xanthate and 20g/t of auxiliary collecting agent butylammonium black powder into tailings obtained by flotation in the step (2) for flotation, wherein concentrate obtained by flotation is coarse nickel concentrate.
And 5, nickel concentration. And (3) regrinding the coarse nickel concentrate obtained in the step (4), wherein the grinding fineness is 75% of that of minus 325 meshes (45 mu m), and 200g/t of inhibitor quicklime is added during regrinding. Combining the regrind ore pulp with tailings produced in the primary refining in the step 3 for primary refining (nickel refining I), and adding 80g/t of gangue inhibitor CMC and 30g/t of auxiliary collector butylammonium black drug during primary refining. The tailings produced by primary concentration are returned to nickel roughing to form closed cycle. And (3) carrying out secondary concentration (nickel concentration II) on the concentrate produced by the primary concentration, wherein 20g/t of CMC (gangue inhibitor) and 80g/t of quicklime (pyrrhotite inhibitor) are added during the secondary concentration. The tailings produced by the secondary concentration return to the primary concentration to form closed cycle. And (3) carrying out three-time concentration (nickel concentration III) on the concentrate produced by the secondary concentration, and adding 70g/t of pyrrhotite inhibitor quicklime during the three-time concentration. Tailings produced by the third concentration are returned to the second concentration for ore feeding to form closed cycle, and concentrate produced by the third concentration is the second nickel concentrate.
And 6, sulfur floatation. And (3) adding 30g/t butyl xanthate into tailings produced in the flotation in the step (4) for sulfur flotation, wherein the produced concentrate is sulfur concentrate, and the tailings are final tailings. The specific results are shown in Table 2.
TABLE 2 various indices of raw ore and concentrate
Example 3
A process method for separating copper, nickel and sulfur from low-grade copper, nickel and sulfide ores with high pyrrhotite content comprises the following steps:
and 1, grinding. Grinding crushed low-grade copper-nickel sulphide ore with high pyrrhotite content, wherein the grinding fineness is 70% of that of-200 meshes (74 mu m), and the addition of the regulator quicklime is 300g/t during grinding.
And step 2, copper roughing. Adding 30g/t of copper collector dithiophosphinate 3418A and 30g/t of foamer methoxy polypropylene glycol (DF 250) into ore pulp obtained by grinding in the step 1 for floatation. The concentrate produced by flotation is blister copper concentrate.
And 3, carefully selecting copper. And (3) regrinding the rough copper concentrate produced in the step (2), wherein the grinding fineness is-325 meshes (45 mu m) and accounts for 90 percent. The regrind pulp is subjected to primary concentration (copper concentration I), and 100g/t of gangue inhibitor CMC, 80g/t of nickel inhibitor quicklime, 10g/t of copper collector dithiophosphinate 3418A and 250 g/t of foaming agent DF are added during primary concentration. And (3) carrying out primary fine sweeping (copper fine sweeping I) on tailings produced by primary fine sweeping, adding 50g/t of gangue inhibitor CMC and 50g/t of nickel inhibitor quicklime during primary fine sweeping, returning concentrate produced by primary fine sweeping to regrinding, and feeding the produced tailings into a subsequent step (5) of nickel fine sweeping. The concentrate produced by the primary concentration is subjected to secondary concentration (copper concentration II), and gangue inhibitors (CMC 30g/t and water glass 50 g/t) and nickel inhibitors (quicklime 40 g/t) are added during the secondary concentration. And (3) carrying out three-time concentration (copper concentration III) on the concentrate produced by the secondary concentration, wherein the concentrate produced by the three-time concentration is the copper concentrate. And (3) performing secondary refining (copper refining II) on tailings produced by secondary refining, and adding nickel inhibitor (quicklime 40 g/t) during secondary refining, wherein the tailings produced by secondary refining are first nickel concentrate. The tailings produced by the third concentration and the concentrate produced by the second concentration are combined and returned to the second concentration for ore feeding to form closed cycle.
And 4, nickel roughing. And (3) adding 30g/t of nickel activator copper sulfate, 100g/t of nickel collecting agent amyl xanthate and 30g/t of auxiliary collecting agent butylammonium black powder into tailings produced by the flotation in the step (2) for flotation, wherein concentrate produced by the flotation is coarse nickel concentrate.
And 5, nickel concentration. The coarse nickel concentrate in the step 4 is regrind, the grinding fineness is 80 percent of minus 325 meshes (45 mu m), and the inhibitor quicklime is added for 300g/t during regrind. Combining the regrind ore pulp with tailings produced in the primary refining in the step 3 for primary refining (nickel refining I), and adding 100g/t of gangue inhibitor CMC and 40g/t of auxiliary collector butylammonium black drug during primary refining. The tailings produced by primary concentration are returned to nickel roughing to form closed cycle. And (3) carrying out secondary concentration (nickel concentration II) on the concentrate produced by the primary concentration, and adding 30g/t of CMC (gangue inhibitor) and 100g/t of quicklime (pyrrhotite inhibitor) during the secondary concentration. The tailings produced by the secondary concentration return to the primary concentration to form closed cycle. And (3) carrying out three-time concentration (nickel concentration III) on the concentrate produced by the secondary concentration, and adding 100g/t of pyrrhotite inhibitor quicklime during the three-time concentration. Tailings produced by the third concentration are returned to the second concentration for ore feeding to form closed cycle, and concentrate produced by the third concentration is the second nickel concentrate.
And 6, sulfur floatation. And (3) adding 50g/t butyl xanthate into tailings produced in the flotation in the step (4) for sulfur flotation, wherein the produced concentrate is sulfur concentrate, and the tailings are final tailings. The specific results are shown in Table 3.
TABLE 3 various indices of raw ore and concentrate
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The process method for separating copper, nickel and sulfur from the low-grade copper, nickel and sulfide ore of the high-pyrrhotite is characterized by comprising the following steps of:
(1) Grinding: adding an adjusting agent during ore grinding;
(2) Roughing copper: adding a copper collector and a foaming agent into the ore pulp obtained by grinding in the step (1) for floatation;
(3) Copper selection: regrinding the concentrate produced by the flotation in the step (2), and then carrying out concentration to obtain copper concentrate;
(4) Roughing nickel: adding a nickel activator, a nickel collector and an auxiliary collector into tailings obtained by flotation in the step (2) for flotation;
(5) Nickel selection: adding a regulator into the concentrate produced by the flotation in the step (4) and regrinding, and then carrying out concentration to obtain nickel concentrate;
(6) Sulfur flotation: and (3) adding a sulfur collector into tailings produced in the flotation in the step (4) for flotation, wherein the produced concentrate is sulfur concentrate.
2. The process according to claim 1, characterized in that: in the step (1), grinding is carried out until the fineness is-200 meshes and accounts for 60-70%, and the amount of the regulator is 100-300 g/t.
3. The process according to claim 1, characterized in that: in the step (2), the copper collector is dithiophosphinate, and the dosage is 10-30 g/t;
The foaming agent is an alcohol foaming agent with the dosage of 10-30 g/t, and preferably, the alcohol foaming agent is methyl isobutyl carbinol or methoxy polypropylene glycol.
4. The process according to claim 1, characterized in that: in the step (3), grinding again until the fineness of 325 meshes is 80-90%, wherein the carefully selecting comprises the following steps:
(3a) Adding gangue inhibitor, nickel inhibitor, copper collector and foaming agent into the regrind ore pulp for primary concentration;
(3b) Adding gangue inhibitors and nickel inhibitors into the concentrate produced by primary concentration, and carrying out secondary concentration;
(3c) Carrying out tertiary concentration on the concentrate produced by secondary concentration, wherein the concentrate produced by tertiary concentration is copper concentrate;
(3d) Adding gangue inhibitors and nickel inhibitors into tailings produced by primary concentration, performing primary fine cleaning, returning the produced concentrate to regrinding in the step (3), and combining the produced tailings with ore pulp regrinded in the step (5);
(3e) And (3) adding nickel inhibitor into tailings produced by secondary concentration, performing secondary refining, wherein the produced tailings are nickel concentrate, and combining the produced concentrate with tailings produced by tertiary concentration to return to the secondary concentration in the step (3 b).
5. The process according to claim 4, wherein:
In the step (3 a), the gangue inhibitor is carboxymethyl cellulose, the dosage is 50-100 g/t, the nickel inhibitor is quicklime, the dosage is 30-80 g/t, the copper collector is dithiophosphinate, the dosage is 1-10 g/t, the foaming agent is an alcohol foaming agent, and the dosage is 1-10 g/t;
In the step (3 b), the gangue inhibitors are carboxymethyl cellulose and water glass, the dosage of the gangue inhibitors is 5-30 g/t and 10-50 g/t respectively, and the dosage of the nickel inhibitors is 10-40 g/t;
in the step (3 d), the gangue inhibitor is carboxymethyl cellulose, the dosage is 10-50 g/t, the nickel inhibitor is quicklime, and the dosage is 10-50 g/t;
in the step (3 e), the nickel inhibitor is quicklime, and the dosage is 10-40 g/t.
6. The process according to claim 1, characterized in that: in the step (4), the nickel activator is copper sulfate with the dosage of 20-50 g/t, the nickel collector is one or more of ethyl xanthate, butyl xanthate or amyl xanthate with the dosage of 50-100 g/t, and the auxiliary collector is butyl ammonium black with the dosage of 10-30 g/t.
7. The process according to claim 1, characterized in that: in the step (5), grinding again until the fineness of-325 meshes is 70-80%, wherein the regulator is quicklime, the dosage is 100-300 g/t, and the carefully selecting comprises the following steps:
(5a) Adding gangue inhibitors and auxiliary collectors into the regrind ore pulp for primary concentration;
(5b) Adding gangue inhibitors and pyrrhotite inhibitors into the concentrate produced by primary concentration, and carrying out secondary concentration;
(5c) Adding pyrrhotite inhibitor into the concentrate produced by the secondary concentration, and carrying out tertiary concentration, wherein the produced concentrate is nickel concentrate;
(5d) The tailings produced by primary concentration return to the nickel roughing of the step (4), the tailings produced by secondary concentration return to the primary concentration of the step (5 a), and the tailings produced by tertiary concentration return to the secondary concentration of the step (5 c).
8. The process according to claim 7, wherein:
in the step (5 a), the gangue inhibitor is carboxymethyl cellulose, the dosage is 50-100 g/t, the auxiliary collector is a butylammonium black drug, and the dosage is 10-40 g/t;
in the step (5 b), the gangue inhibitor is carboxymethyl cellulose, the dosage is 10-30 g/t, the pyrrhotite inhibitor is quicklime, and the dosage is 50-100 g/t;
In the step (5 c), the pyrrhotite inhibitor is quicklime, and the dosage is 50-100 g/t.
9. The process according to claim 1, characterized in that: in the step (6), the sulfur collector is one or more of ethyl xanthate, butyl xanthate and amyl xanthate, and the dosage is 10-50 g/t.
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