AU2017421972A1 - Double-region flotation method for copper-cobalt sulfide ore in industrial production - Google Patents
Double-region flotation method for copper-cobalt sulfide ore in industrial production Download PDFInfo
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- AU2017421972A1 AU2017421972A1 AU2017421972A AU2017421972A AU2017421972A1 AU 2017421972 A1 AU2017421972 A1 AU 2017421972A1 AU 2017421972 A AU2017421972 A AU 2017421972A AU 2017421972 A AU2017421972 A AU 2017421972A AU 2017421972 A1 AU2017421972 A1 AU 2017421972A1
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- slurry
- ore
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- 238000005188 flotation Methods 0.000 title claims description 55
- 238000000034 method Methods 0.000 title claims description 48
- NHPHQYDQKATMFU-UHFFFAOYSA-N [Cu]=S.[Co] Chemical compound [Cu]=S.[Co] NHPHQYDQKATMFU-UHFFFAOYSA-N 0.000 title claims description 20
- 238000009776 industrial production Methods 0.000 title claims description 7
- 238000004140 cleaning Methods 0.000 claims description 94
- 239000002002 slurry Substances 0.000 claims description 63
- 238000000227 grinding Methods 0.000 claims description 41
- 239000012141 concentrate Substances 0.000 claims description 37
- 230000002000 scavenging effect Effects 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 25
- 239000003153 chemical reaction reagent Substances 0.000 claims description 24
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 18
- 239000003112 inhibitor Substances 0.000 claims description 18
- 229910052708 sodium Inorganic materials 0.000 claims description 18
- 239000011734 sodium Substances 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 16
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 10
- 238000000498 ball milling Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000003002 pH adjusting agent Substances 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 229910017052 cobalt Inorganic materials 0.000 description 5
- 239000010941 cobalt Substances 0.000 description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- FWZLXRFUDMNGDF-UHFFFAOYSA-N [Co].[Cu]=O Chemical compound [Co].[Cu]=O FWZLXRFUDMNGDF-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052947 chalcocite Inorganic materials 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
- RYTYSMSQNNBZDP-UHFFFAOYSA-N cobalt copper Chemical compound [Co].[Cu] RYTYSMSQNNBZDP-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001779 copper mineral Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052569 sulfide 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- 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
- B03D1/002—Inorganic 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
- B03D1/001—Flotation agents
- B03D1/004—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
- B03D1/14—Flotation machines
- B03D1/1406—Flotation machines with special arrangement of a plurality of flotation cells, e.g. positioning a flotation cell inside another
-
- 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)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
TWO-ZONED FLOTATION METHOD FOR COPPER-COBALT SULFIDE ORE IN INDUSTRIAL PRODUCTION
FIELD OF THE INVENTION [0001 ] This invention relates to the field of mineral processing engineering, and in particular to a two-zoned flotation method for copper-cobalt sulfide ore in industrial production.
BACKGROUND OF THE INVENTION [0002] There are few mature industrial applications in China for the beneficiation of copper-cobalt sulfide ore. Recovery rate and concentrate grade are two interrelated and contradictory indexes in the field of beneficiation. A problem lies in that it is not easy to relatively separately control the concentrate grade and the recovery rate.
SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to provide a tow-zoned flotation method for copper-cobalt sulfide ore in industrial production, which allows the efficient recovery of copper and cobalt from copper-cobalt sulfide ore in industrial production. A two-zoned, stepwise flotation method effectively alleviates the contradiction between the recovery rate and the concentrate grade in the field and increases the efficiency of quality control. Through this method, the efficiency of optimizing the recovery rate and the concentrate grade is greatly improved, and the relatively separate control of the concentrate grade and the recovery rate can be achieved.
[0004] The technical solutions of the present application are as follows:
[0005] A two-zoned flotation method for copper-cobalt sulfide ore in industrial production, characterized in that it comprises the following steps:
[0006] 1) step I: coarse grinding [0007] pouring ore transported by a vehicle directly through a raw ore grid screen into an ore storehouse, feeding the ore into a jaw crusher through a heavy plate feeder; transferring a coarse grinding product to an intermediate ore pile through a belt conveyor;
[0008] 2) step II: intermediate ore pile stacking [0009] providing an intermediate ore pile to act as an ore-supplying buffer for a separation process to ensure ore supply during maintenance shutdown of grinding; this is due to an operating system for coarse grinding being different from that for separation;
[0010] 3) step III: grinding [0011] transporting ore from an intermediate ore pile to a semi-autogenous grinding mill by a belt for grinding; transferring a sieved material to a hydrocyclone by a slurry pump for classification after the sieved material enters a grinding sump; transferring sediment to a ball mill for grinding; transferring a product of ball milling to a hydrocyclone by a slurry pump for classification after the product of ball milling enters a grinding sump; sending an overflow product for flotation, transferring sediment to a ball mill for grinding;
[0012] 4) step IV: flotation [0013] adopting a zoned flotation process that is divided into two zones: zone I is mainly for controlling a concentrate index, zone II is for controlling recovery rate, zone I and zone II respectively comprises a mixing bucket, namely al# mixing bucket and a 2# mixing bucket, each zone respectively produces a concentrate product, namely concentrate 1 and concentrate 2;
[0014] adopting a “two roughing, one scavenging, and three cleanings” process for a flotation operation in zone I:
[0015] adding a reagent for zone I roughing I to a 1# mixing bucket; introducing an overflow slurry of a hydrocyclone to a roughing I flotation cell after the overflow slurry enters al# mixing bucket and is thoroughly mixed, the 1# mixing bucket is a starting point of zone 1; introducing slurry of a roughing I operation to a roughing II operation; introducing slurry of a roughing II operation to a scavenging operation; introducing froths of a roughing I operation and a roughing II operation to a cleaning operation area in zone 1; allowing froth from a scavenging operation to return to a roughing II operation and slurry to go to a starting position of zone II, which is a 2# mixing bucket; cleaning zone I involves three cleaning processes: introducing froth of a cleaning I operation to a cleaning II operation, allowing slurry to return to a roughing I operation, introducing froth of a cleaning II operation to a cleaning III operation, adding no reagent in a cleaning III operation, allowing slurries from a cleaning II operation and a cleaning III operation to return to cleaning I and cleaning II separately and sequentially; froth of a cleaning III operation is concentrate I product.
[0016] The reagent for zone I roughing I is added to a 1//mixing bucket, and includes 600 g/t of lime as a pH adjuster to keep the pH of slurry within 9.5 - 10.0, 150 g/t of sodium humate as an inhibitor, 70 g/t of 2# oil as a frothing agent, and 60 g/t of butyl xanthate as a collector.
[0017] The reagent for zone I roughing II added includes 70 g/t of sodium humate as an inhibitor, 24 g/t of 2# oil as a frothing agent, and 35 g/t of butyl xanthate as a collector.
[0018] Only 25 g/t of butyl xanthate as a collector is added in the scavenging operation of zone I.
[0019] Only 40 g/t of sodium humate as an inhibitor is added in the cleaning I operation of zone I.
[0020] Only 20 g/t of sodium humate as an inhibitor is added in the cleaning II operation of zone I.
[0021 ] Adopting a “one roughing, two scavengings, and three cleanings” process for a flotation operation in zone II:
[0022] adding a reagent for zone II roughing to a 2# mixing bucket; introducing slurry to a roughing I flotation cell after the slurry is thoroughly mixed; introducing slurry of a roughing operation to a scavenging I operation; introducing slurry to a zone II cleaning operation area, introducing slurry of a scavenging I operation to a scavenging II operation, allowing froth to return to a roughing operation, adding no flotation reagent in a scavenging II operation, introducing slurry of scavenging II to a tailings pond, transporting the slurry of scavenging II to a tailings thickener by a slurry pump; a cleaning operation in zone II is divided into three cleaning processes, introducing froth from cleaning I to cleaning II, allowing slurry to return to a roughing operation, introducing froth of a cleaning II operation to cleaning III; allowing slurries of a cleaning II operation and a cleaning III operation to return to cleaning I and cleaning II separately and sequentially; froth of cleaning III is concentrate II product.
[0023] The reagent for zone II roughing I includes butyl xanthate as a collector and sodium humate as an inhibitor in an amount of 20 g/t and 30 g/t respectively.
[0024] Only 10 g/t of butyl xanthate as a collector is added to the scavenging I operation of zone II.
[0025] In cleaning I and cleaning II of zone II, only sodium humate as an inhibitor is added in an amount of 15 g/t and 10 g/t respectively.
[0026] The beneficial effects of the present invention are as follows:
[0027] This beneficiation method of copper-cobalt sulfide ore has a simple reagent system and achieves a good separation effect through the optimization of both the process and the ratio of reagents. The beneficiation process of this method is applied in a copper-cobalt mine. Flotation zone I controls a product index, whereas flotation zone II mainly controls the recovery rate. By adapting zoned-flotation and dividing the tasks, the contradiction between recovery rate and concentrate grade in a beneficiation process can be alleviated, which separates the technical solutions for these two goals and facilitates the control of indexes.
BRIEF DESCRIPTION OF THE DRAWINGS [0028] The present invention has 3 drawings in total.
[0029] FIG. 1 is a diagram showing the devices for the two-zoned flotation method for copper-cobalt sulfide ore according to the present invention.
[0030] FIG. 2 is a diagram showing the steps of the two-zoned flotation method for copper-cobalt sulfide ore according to the present invention.
[0031] FIG. 3 is a flow chart showing the process of the two-zoned flotation method for copper-cobalt sulfide ore according to the present invention.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS [0032] The present invention will be described in further detail below with reference to the drawings and preferred embodiments.
[0033] Embodiment 1 [0034] The type of raw ore targeted is mainly copper-cobalt sulfide ore, of which the average grade of copper is 1.5%, the average grade of cobalt is 0.5%. Its mineralogical characteristics are as follows: copper minerals in the ore mainly include chalcopyrite, followed by porphyrite, chalcocite, a very small amount of natural copper and copper blue, among others; cobalt mineral is carrollite; sulfide minerals are mainly pyrite, among others; gangue minerals mainly include dolomite, quartz, mica, among others; the ore contains a small amount of carbonaceous matter.
[0035] Grinding involves a SAB process of semi-autogenous grinding and ball milling.
[0036] The separation process involves flotation. The flotation process is a zoned flotation process which takes place in two zones. Zone 1 is mainly for controlling a concentrate index, whereas zone 2 is for controlling the recovery rate.
[0037] The main process is as follows:
[0038] 1. Coarse grinding [0039] Raw ore density: 2.73 t/m3, loose factor: 1.5-1.7, moisture content of the ore: 2-5%.
[0040] The coarse crushing station is arranged in the open air. The ore transported by a vehicle is directly poured through a raw ore grid screen into a storehouse.
[0041] The ore is then fed into a jaw crusher through a 1500χ8000 mm heavy plate feeder. [0042] The size of the crusher's feeding port is 850 χ 1100 mm; the particle size of the incoming feed is 0-750 mm; the maximum particle size of the product is 150 mm; the coarse grinding product is transferred to an intermediate ore pile through al# belt conveyor.
[0043] 2. Intermediate ore pile [0044] As the operating system for grinding is different from that for separation, to ensure ore supply during maintenance shutdown of grinding, an intermediate ore pile is provided to act as an ore-supplying buffer for the separation process.
Main Equipment at the Intermediate Ore Pile:
| Name | Main technical parameters |
| Belt conveyor | B = 1000, Lh = 198.95 m, a = 8° |
| Heavy plate feeder | 1200x 6000 (width χ length) |
| Electric hoist | Q = 2t |
| Submerged pump | 65ZJLA-B30 |
| LPM7B-450 type air box pulse bag filter | Air volume: 12,000 m3/h, resistance: 470 - 1770 Pa, filtering area: 434 m2, net filtering area: 372 m2 |
| 9-26NO11.2D type centrifugal fan | Wind volume: 19,966 m3/h, wind pressure: 3225 Pa, rotation speed: 960 r/min |
| D941W-1C type electric butterfly valve | DN630 |
[0045] 3. Grinding [0046] The particle size of a semi-autogenous grinding incoming ore is 250-0 mm, P80 = 175mm; the required particle size of the discharged ore is -2mm > 80%, and grinding concentration (average) is 75% - 80%. The discharge end is provided with a double-layer cylindrical sieve (the size of an inner-layer sieve opening is 20 χ 40mm, the size of an outer-layer sieve opening is 6 x 15mm). The sieved material enters a grinding sump and is sent to a hydrocyclone by a slurry pump for classification: the overflow product is sent for flotation; the sediment enters a ball mill for grinding.
[0047] The particle size of the incoming ore for ball milling: P80 = 2mm; grinding concentration (average): 75% -80%; cyclic loading: 300%; rotation speed: 13 r/min; rotation rate: 75%. The grinding product of the ball mill enters the grinding sump (shared with semi-autogenous grinding) and is then pumped into a hydrocyclone by a slurry pump for classification: the overflow product is sent for flotation; the sediment enters a ball mill for grinding.
[0048] The specification of the group of hydrocyclones: Φ500χ10; the amount of incoming feed slurry: 335.7m3/h (taking fluctuation coefficient into account); the weight concentration of the overflow: 30%; overflow fineness: -0.074mm accounts for 80%.
Main Equipment in a Grinding Workshop
| Name | Main technical parameters |
| Belt conveyor | B= 1000, Lh= 118.0 m, a= 15° |
| Wet-type semi-autogenous grinding mill | Φ5.5x3.0 (EGL) |
| With a semi-autogenous grinding low-pressure part | |
| Overflow-type ball mill | Φ3.8χ6.6 m |
| With a ball mill low-pressure part | |
| Slurry pump (cyclone feed) | 250/200 |
| Group of hydrocyclones | Φ500χ6 |
| Electric hoist | Q = 2t, H = 15 m |
| Pipe sampler (raw ore) | DN600 |
| Submerged pump | 65 (exit) |
| Car crane | Q = 50 t |
| Car crane | Q = 20 t |
| T35-11NO4 axial fan | Wind volume: 3800 m3/h, full pressure: 88 Pa, rotation speed: 1450 r/min |
| T35-11NO6.3 axial fan | Wind volume: 10,472 m3/h, full pressure: 101 Pa, rotation speed: 960 rpm |
| KF-72LW air-cooled cabinet air conditioner | Cooling capacity: 7200 W |
| Electronic belt scale | 0 - 200 t/h |
| Electromagnetic Flowmeter | 0 - 60 m3/h; DN100 |
| Electric regulating butterfly valve | DN100 |
| Ultrasonic level meter | 0-4m |
| Pressure transmitter with remote transmission | 0-0.12 MPa |
| Online particle size analyzer | -0.074 mm accounts for 65% |
| Density meter | 0 - 40% |
[0049] 4. Flotation [0050] Two operation zones, zone 1 and zone 2 are involved in flotation. Each of the two zones comprises a mixing bucket, namely, al# mixing bucket and a 2# mixing bucket. Each of the two zones produces a concentrate product, namely, concentrate I and concentrate II. The detailed process is described below.
[0051] The flotation operation in zone 1 can be summarized as a “two roughing, one scavenging, and three cleanings” process.
[0052] The overflow slurry from the hydrocyclone enters al# mixing bucket, which is the starting point of zone 1.
[0053] In zone 1 roughing I, reagents are added to the 1# mixing bucket. The reagents include 600 g/t of lime as a pH adjuster to keep the pH of the slurry within 9.5 - 10.0, 150 g/t of sodium humate as an inhibitor, 70 g/t of 2# oil as a frothing agent, and 60 g/t of butyl xanthate as a collector. After the slurry is thoroughly stirred, it enters a roughing I flotation cell. The slurry of the roughing I operation then enters a roughing II operation.
[0054] The reagents added in the roughing II operation are 70 g/t of sodium humate as an inhibitor, 24 g/t of 2# oil as a frothing agent, and 35 g/t of butyl xanthate as a collector.
[0055] The slurry of the roughing II operation goes to scavenging. The froths of the roughing I operation and the roughing II operation go to a cleaning operation area in zone 1.
[0056] In the scavenging operation, only 25 g/t of butyl xanthate as a collector is added. The froth of the scavenging operation returns to the roughing II operation, the slurry goes to the starting position of zone 2, which is the 2# mixing bucket.
[0057] The cleaning operation in zone 1 is divided into three cleaning processes.
[0058] In a cleaning I operation, only 40 g/t of sodium humate as an inhibitor is added. The froth of cleaning I goes to a cleaning II operation, the slurry returns to the roughing I operation. [0059] Similarly, in cleaning II, only 20 g/t of sodium humate as an inhibitor is added. The froth of cleaning II goes to a cleaning III operation.
[0060] In the cleaning III operation, no reagent is added. The slurries of the cleaning II operation and the cleaning III operation return to cleaning I and cleaning II separately and sequentially. The froth of the cleaning III operation is concentrate I product.
[0061] The flotation operation in zone 2 can be summarized as a “one roughing, two scavengings, and three cleanings” process.
[0062] In a zone 2 roughing operation, reagents are added to the 2# mixing bucket. The reagents include 20g/t g/t of butyl xanthate as a collector and 30 g/t of sodium humate as an inhibitor. After the slurry is thoroughly stirred, it enters a roughing I flotation cell. The slurry of the roughing operation then goes to a scavenging I operation, the slurry goes to a zone 2 cleaning operation area.
[0063] In the scavenging I operation, only 10 g/t of butyl xanthate as a collector is added. The slurry from the scavenging I operation goes to a scavenging II operation, the froth returns to the roughing operation. In the scavenging II operation, no floatation reagent is added. The slurry from scavenging II goes to the tailings pond and is transported to a tailings thickener by a slurry pump [0064] The cleaning operation in zone 2 is divided into three cleaning processes.
[0065] The froth of a cleaning I operation goes to a cleaning II operation, the slurry returns to the roughing operation. In cleaning I and cleaning II, only sodium humate as an inhibitor is added in an amount of 15 g/t and 10 g/t respectively.
[0066] The froth from the cleaning II operation goes to cleaning III. The slurries of the cleaning II operation and the cleaning III operation return to cleaning I and cleaning II separately and sequentially.
[0067] The froth of cleaning III is concentrate II product.
Main Equipment in a Flotation Workshop
| Name | Main technical parameters |
| Flotation cell (flotation of sulfide ore) | Φ3.5x4.0 m |
| Flotation cell (flotation of oxide ore) | Φ4.0x4.5 m |
| Flotation machine | XCF-30 |
| Flotation machine | KYF-30 |
| Flotation machine | XCF-8 |
| Flotation machine | KYF-8 |
| Slurry pump (sulfide ore flotation concentrate) | 80/65 |
| Slurry pump (oxide ore flotation concentrate) | 50/40 |
| Slurry pump (tailings) | 250/200 |
| Pipe sampler (copper-cobalt sulfide concentrate) | DN200 |
| Pipe sampler (copper cobalt oxide concentrate) | DN200 |
| Pipe sampler (flotation tailings) | DN350 |
| Blower | 450 m3, 50 kPa |
| Submerged pump (accident pool) | 65 (exit) |
| Submerged pump (in a tailings pit) | 65 (exit) |
| Liquid level of a sulfide ore cleaning tailings pump pool | 0 - 1.5 m |
| Liquid level of a sulfide ore flotation concentrate pump pool | 0 - 1.5 m |
| Liquid level of an oxide ore flotation concentrate pump pool | 0 - 1.5 m |
| Liquid level of a flotation tailings pump pool | 0 - 2.5 m |
| Blower outlet wind pressure | 0 - 0.05 MPa |
[0068] Production indexes are summarized in the table below.
| Raw Ore | The amount of ore selected | Tons | 86855 |
| Grade of the ore selected | |||
| Wherein Cu | % | 1.50% | |
| Co | % | 0.61% | |
| The amount of metal in the ore selected | |||
| Wherein Cu | Tons | 1306.44 | |
| Co | Tons | 528.56 |
| Concentrate | The amount of concentrate | Tons | 5635 |
| Concentrate grade | |||
| Wherein Cu | % | 21.15% | |
| Co | % | 7.43% | |
| The amount of metal in concentrate | |||
| Wherein Cu | Tons | 1191.86 | |
| Co | Tons | 418.79 | |
| Concentrate yield | % | 6.49% | |
| Recovery rate | |||
| Wherein Cu | % | 91.23% | |
| Co | % | 79.23% | |
| Tailings | The amount of tailings | Tons | 81220 |
| Tailings grade | |||
| Wherein Cu | % | 0.141% | |
| Co | % | 0.135% | |
| The amount of metal in tailings | |||
| Wherein Cu | Tons | 114.58 | |
| Co | Tons | 109.77 |
[0069] Judging from the production results, this method allows efficient separation of copper-cobalt sulfide ore.
[0070] Finally, using this method, a copper-cobalt sulfide concentrate with a Cu grade of 23% and a Co grade of 8% can be produced from a copper-cobalt sulfide raw ore with a Cu grade of 1.5% and a Co grade of 0.5%. The copper recovery rate is over 90%, and the cobalt recovery rate is over 80%. In addition, through the optimization of the reagent system, the reformed process allows mixed separation of copper-cobalt sulfide ores and copper-cobalt oxide ores; thus, oxide ore can also be treated.
[0071] Adapting the process described in Fig. 3, processing capacity reaches 3000 t/d; a copper-cobalt sulfide concentrate with a Cu grade of 23% and a Co grade of 8% can be produced from a copper-cobalt sulfide raw ore with a Cu grade of 1.5% and a Co grade of 0.5%. The copper recovery rate is over 90%, and the cobalt recovery rate is over 80%.
Claims (9)
1) step I: coarse grinding pouring ore transported by a vehicle directly through a raw ore grid screen into an ore storehouse, feeding the ore into a jaw crusher through a heavy plate feeder; transferring a coarse grinding product to an intermediate ore pile through a belt conveyor;
1. A two-zoned flotation method for copper-cobalt sulfide ore in industrial production, characterized in that it comprises the following steps:
2. The method according to claim 1, characterized in that the reagent for zone I roughing I is added to a 1//mixing bucket, and includes 600 g/t of lime as a pH adjuster to keep the pH of slurry within 9.5 - 10.0, 150 g/t of sodium humate as an inhibitor, 70 g/t of 2# oil as a frothing agent, and 60 g/t of butyl xanthate as a collector.
2) step II: intermediate ore pile stacking providing an intermediate ore pile to act as an ore-supplying buffer for a separation process to ensure ore supply during maintenance shutdown of grinding; this is due to an operating system for coarse grinding being different from that for separation;
3. The method according to claim 1, characterized in that the reagent for zone I roughing II added includes 70 g/t of sodium humate as an inhibitor, 24 g/t of 2# oil as a frothing agent, and 35 g/t of butyl xanthate as a collector.
3) step III: grinding transporting ore from an intermediate ore pile to a semi-autogenous grinding mill by a belt for grinding; transferring a sieved material to a hydrocyclone by a slurry pump for classification after the sieved material enters a grinding sump; transferring sediment to a ball mill for grinding; transferring a product of ball milling to a hydrocyclone by a slurry pump for classification after the product of ball milling enters a grinding sump; sending an overflow product for flotation, transferring sediment to a ball mill for grinding;
4. The method according to claim 1, characterized in that only 25 g/t of butyl xanthate as a collector is added in the scavenging operation of zone I.
4) step IV: flotation adopting a zoned flotation process that is divided into two zones: zone I is mainly for controlling a concentrate index, zone II is for controlling recovery rate, zone I and zone II respectively comprises a mixing bucket, namely al# mixing bucket and a 2# mixing bucket, each zone respectively produces a concentrate product, namely concentrate 1 and concentrate 2;
adopting a “two roughing, one scavenging, and three cleanings” process for a flotation operation in zone I:
adding a reagent for zone I roughing I to a 1# mixing bucket; introducing an overflow slurry of a hydrocyclone to a roughing I flotation cell after the overflow slurry enters al# mixing bucket and is thoroughly mixed, the 1# mixing bucket is a starting point of zone 1; introducing slurry of a roughing I operation to a roughing II operation; introducing slurry of a roughing II operation to a scavenging operation; introducing froths of a roughing I operation and a roughing II operation to a cleaning operation area in zone 1; allowing froth from a scavenging operation to return to a roughing II operation and slurry to go to a starting position of zone II, which is a 2# mixing bucket; cleaning zone I involves three cleaning processes: introducing froth of a cleaning I operation to a cleaning II operation, allowing slurry to return to a roughing I operation, introducing froth of a cleaning II operation to a cleaning III operation, adding no reagent in a cleaning III operation, allowing slurries from a cleaning II operation and a cleaning III operation to return to cleaning I and cleaning II separately and sequentially; froth of a cleaning III operation is concentrate I product;
adopting a “one roughing, two scavengings, and three cleanings” process for a flotation operation in zone II:
adding a reagent for zone II roughing to a 2# mixing bucket; introducing slurry to a roughing I flotation cell after the slurry is thoroughly mixed; introducing slurry of a roughing operation to a scavenging I operation; introducing slurry to a zone II cleaning operation area, introducing slurry of a scavenging I operation to a scavenging II operation, allowing froth to return to a roughing operation, adding no flotation reagent in a scavenging II operation, introducing slurry of scavenging II to a tailings pond, transporting the slurry of scavenging II to a tailings thickener by a slurry pump; a cleaning operation in zone II is divided into three cleaning processes, introducing froth from cleaning I to cleaning II, allowing slurry to return to a roughing operation, introducing froth of a cleaning II operation to cleaning III; allowing slurries of a cleaning II operation and a cleaning III operation to return to cleaning I and cleaning II separately and sequentially; froth of cleaning III is concentrate II product.
5. The method according to claim 1, characterized in that only 40 g/t of sodium humate as an inhibitor is added in the cleaning I operation of zone I.
6. The method according to claim 1, characterized in that only 20 g/t of sodium humate as an inhibitor is added in the cleaning II operation of zone I.
7. The method according to claim 1, characterized in that the reagent for zone II roughing I includes butyl xanthate as a collector and sodium humate as an inhibitor in an amount of 20 g/t and 30 g/t respectively.
8. The method according to claim 1, characterized in that only 10 g/t of butyl xanthate as a collector is added to the scavenging I operation of zone II.
9. The method as claimed in claim 1, characterized in that in cleaning I and cleaning II of zone II, only sodium humate as an inhibitor is added in an amount of 15 g/t and 10 g/t respectively.
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| CN201710547556.6A CN107398353B (en) | 2017-07-06 | 2017-07-06 | One kind being used for industrial copper cobalt sulfide ore two-region method for floating |
| CN2017105475566 | 2017-07-06 | ||
| PCT/CN2017/102857 WO2019006889A1 (en) | 2017-07-06 | 2017-09-22 | Double-region flotation method for copper-cobalt sulfide ore in industrial production |
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| CN108298595B (en) * | 2018-04-26 | 2020-03-24 | 浙江美都墨烯科技有限公司 | Method for preparing copper-cobalt sulfide microspheres |
| CN109201320B (en) * | 2018-08-23 | 2020-04-21 | 北京矿冶科技集团有限公司 | Beneficiation method for copper-cobalt ore containing easy-to-float gangue |
| CN110935559A (en) * | 2019-11-14 | 2020-03-31 | 中国恩菲工程技术有限公司 | Method for comprehensively treating copper-cobalt ore |
| CN111850295A (en) * | 2020-07-13 | 2020-10-30 | 浙江科菲科技股份有限公司 | Method for processing African low-grade copper-cobalt ore |
| CN113893952B (en) * | 2021-09-18 | 2023-08-01 | 金川集团股份有限公司 | Copper-cobalt ore beneficiation method |
| CN115121365B (en) * | 2022-07-01 | 2023-04-04 | 阿巴嘎旗金地矿业有限责任公司 | Intelligent molybdenum ore sorting and pre-throwing process |
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| JPS5916502B2 (en) * | 1980-04-11 | 1984-04-16 | 同和鉱業株式会社 | preferential flotation method |
| US5807479A (en) * | 1994-07-15 | 1998-09-15 | Coproco Development Corporation | Process for recovering copper from copper-containing material |
| RU2132748C1 (en) * | 1997-12-16 | 1999-07-10 | АООТ "Институт "Механобр" | Method for controlled finishing of rough copper-nickel concentrates |
| CN100594067C (en) * | 2006-12-30 | 2010-03-17 | 陈铁 | Beneficiation method of complex copper oxide ore |
| CN101954314B (en) * | 2010-09-08 | 2012-12-12 | 大冶有色金属集团控股有限公司 | Method for improving copper concentration technical index of graphite-containing copper ore |
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| CN103480500A (en) * | 2013-09-18 | 2014-01-01 | 北京矿冶研究总院 | Flotation method for carbonaceous matter copper-cobalt ore |
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| CN103611624B (en) * | 2013-11-27 | 2015-11-25 | 中南大学 | A kind of flotation-acidleach process integration processing low-grade mixed copper ore |
| CN106238197B (en) * | 2016-08-11 | 2018-08-31 | 李国民 | Copper concentrate produces the roasting-beneficiation method of " copper matte regulus " |
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