CN105435954A - Method for increasing copper and nickel recycling rate from copper-nickel sulfide ore flotation middlings - Google Patents
Method for increasing copper and nickel recycling rate from copper-nickel sulfide ore flotation middlings Download PDFInfo
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- CN105435954A CN105435954A CN201510899106.4A CN201510899106A CN105435954A CN 105435954 A CN105435954 A CN 105435954A CN 201510899106 A CN201510899106 A CN 201510899106A CN 105435954 A CN105435954 A CN 105435954A
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- flotation
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- copper nickel
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- nickel sulfide
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- 238000005188 flotation Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 59
- YFLLTMUVNFGTIW-UHFFFAOYSA-N nickel;sulfanylidenecopper Chemical compound [Ni].[Cu]=S YFLLTMUVNFGTIW-UHFFFAOYSA-N 0.000 title claims abstract description 47
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title abstract description 37
- 229910052759 nickel Inorganic materials 0.000 title abstract description 23
- 229910052802 copper Inorganic materials 0.000 title abstract description 20
- 239000010949 copper Substances 0.000 title abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract description 10
- 238000004064 recycling Methods 0.000 title abstract 5
- 239000012141 concentrate Substances 0.000 claims abstract description 73
- 230000008569 process Effects 0.000 claims abstract description 40
- 238000002386 leaching Methods 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims description 56
- 239000000047 product Substances 0.000 claims description 44
- 229910052569 sulfide mineral Inorganic materials 0.000 claims description 39
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 34
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 34
- 238000011084 recovery Methods 0.000 claims description 31
- 239000004088 foaming agent Substances 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 14
- 239000002893 slag Substances 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 7
- 239000002516 radical scavenger Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 39
- 239000003112 inhibitor Substances 0.000 abstract description 21
- 239000000395 magnesium oxide Substances 0.000 abstract description 20
- 230000002829 reductive effect Effects 0.000 abstract description 13
- 230000002411 adverse Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 238000007667 floating Methods 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 3
- 229910052749 magnesium Inorganic materials 0.000 abstract 3
- 239000011777 magnesium Substances 0.000 abstract 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 2
- 239000006260 foam Substances 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 abstract 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 17
- 239000000391 magnesium silicate Substances 0.000 description 17
- 229910052919 magnesium silicate Inorganic materials 0.000 description 17
- 235000019792 magnesium silicate Nutrition 0.000 description 17
- 239000004115 Sodium Silicate Substances 0.000 description 16
- 235000019795 sodium metasilicate Nutrition 0.000 description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 16
- 229910052911 sodium silicate Inorganic materials 0.000 description 16
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 description 11
- 235000010755 mineral Nutrition 0.000 description 11
- 239000011707 mineral Substances 0.000 description 11
- 238000003756 stirring Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 6
- 229910001919 chlorite Inorganic materials 0.000 description 4
- 229910052619 chlorite group Inorganic materials 0.000 description 4
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000454 talc Substances 0.000 description 4
- 229910052623 talc Inorganic materials 0.000 description 4
- 235000012222 talc Nutrition 0.000 description 4
- 239000010459 dolomite Substances 0.000 description 3
- 229910000514 dolomite Inorganic materials 0.000 description 3
- 229910052889 tremolite Inorganic materials 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000010450 olivine Substances 0.000 description 2
- 229910052609 olivine Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for increasing the copper and nickel recycling rate from copper-nickel sulfide ore flotation middlings. The technical problems that, the copper-nickel sulfide ore middling circulation amount is large, floatability is poor, and recycling is hard can be solved, meanwhile, the adverse effect of magnesium-containing silicate to flotation of copper-nickel sulfide ore can be lowered, the content of magnesium oxide in concentrate and the usage amount of inhibitor are reduced, and the copper and nickel recycling rate is increased. In the copper-nickel sulfide ore flotation process, selective acid leaching magnesium removing treatment is carried out on the middlings (scavenging concentrate and cleaner tailings) in the copper-nickel sulfide ore through acid adding under the normal temperature and the normal pressure, and therefore the circulation number of middlings floating hardly is reduced, and the adverse effect of magnesium-containing silicate on flotation of copper-nickel sulfide ore is lowered. After leaching is finished, flotation is carried out on leaching residues, the copper and nickel recycling rate is increased, and foam products obtained through two times of flotation are combined to serve as low-grade concentrate. The method is reasonable in technology and simple in process, and industrial implementation is easy.
Description
Technical field
The present invention relates to a kind of method improving copper nickel sulfide mineral flotation chats copper nickel recovery, particularly reduce the method containing magnesium silicate, copper nickel sulfide mineral flotation adverse effect being improved to copper nickel recovery, use the method to reduce, containing magnesium silicate, the circulation of chats in flotation flowsheet is floated to the adverse effect of cu-ni sulphide ore flotation and difficulty, reduce magnesian content in concentrate, improve copper nickel recovery.
Background technology
China's copper nickel sulfide mineral aboundresources, but most copper nickel sulfide mineral has the feature of high magnesium iron, and its main gangue mineral is that serpentine, the tremolite, chlorite and talcum etc. contain the high silicate mineral of MgO.In the floatation process of copper nickel sulfide mineral, because of containing magnesium silicate mineral surfaces lotus positive electricity, easily with electronegative copper-nickel sulfide mineral generation heteromophism coacervation, worsen the floatation process of copper nickel sulfide mineral, cause the rising of content of MgO in concentrate.
In addition, because the embedding cloth relation of valuable mineral in copper nickel sulfide mineral is complicated, for improving the degree of dissociation of target minreal, in production practices, sorting of copper nickel sulfide mineral adopts multistage grinding, multistage flotation flowsheet more, also therefore a large amount of floating chats of micro-size fraction difficulty is produced, there is following characteristics in the recovery of copper nickel sulfide mineral flotation chats: in (1) chats, copper nickel thing mostly is lean intergrowth, and embedding cloth relation is complicated, disseminated grain size is thin; (2) chats clay content is large, ore grain size is fine; (3) alteration is serious, and serpentine, the tremolite etc. are high containing magnesium silicate content, and content of MgO is generally up to more than 18%.In current most of copper nickel sulfide mineral flotation process, all that this part difficult floating chats is back in upper level flotation operation step by step, but this mode not only increases serpentine and difficulty floats the circulation of chats in flotation flowsheet, affect the flotation of copper nickel thing, reduce the recovery rate in ore-dressing of copper nickel, easily cause the rising of content of MgO in concentrate simultaneously.Therefore, how to find a kind of method effectively and reasonably and handle this part difficult floating chats well, and reduce the adverse effect of serpentine to floatation process, there is important practical significance.
Containing magnesium silicate to the content of MgO in the adverse effect of copper nickel flotation and copper-nickel concentrate for reducing serpentine etc., how reaching this purpose by adding a large amount of floatation regulators at present.Main adjusting agent is divided into sludge dispersant and the inhibitor containing magnesium silicate, as carboxymethyl cellulose (CMC), sodium carbonate, sodium metasilicate and calgon etc.But a large amount of uses of inhibitor, easily to the raw inhibitory action of copper nickel produce, affect the recovery of nickel and copper, make tailing filtration sedimentation difficulty simultaneously.Therefore, how while not affecting copper nickel recovery, reduce the difficult problem that serpentine etc. is cu-ni sulphide ore ore dressing to the adverse effect of flotation and the content that reduces MgO in concentrate containing magnesium silicate always.Liu Yu waits by force people by adding the concentrated sulfuric acid at nickel ore concentrate, magnesia in the concentrated sulfuric acid and concentrate is reacted, produce magnesium sulfate, carrying out Separation of Solid and Liquid, make it be stranded in sulfuric acid solution to be separated with concentrate, but because in concentrate, ambrose alloy content is higher, and the sulfuric acid concentration that the method uses is higher, easily cause nickel and copper dissolution loss (number of patent application 201210526480.6) in concentrate.The people such as Feng Qiming adopt ultrasonic wave to produce supersonic jet and cavitation to raw ore slurry or add the ore pulp after collecting agent and carry out ultrasonic pretreatment, thus reduce serpentine etc. containing the absorption of magnesium silicate on nickel sulfide mineral surface and cover cap, and then magnesian content in reduction concentrate, though the method can reduce the loss of nickel and copper, reduce the content of MgO in concentrate, but be difficult to industrial applications (number of patent application 201310268992.1).The people such as Zhang Guofan are according to containing the high feature of magnesium silicate surface potential, have developed a kind of organic assembling inhibitor EP, rely on a large amount of-OH of the water-soluble rear generation of EP and-COOH, positive potential containing magnesium silicate surface is reduced greatly, prevent the carrying out hindering flotation containing forming " heterocoagulation " phenomenon between magnesium silicate and copper nickel composition granule, strengthen the suppression containing magnesium silicate gangue mineral, but the method inhibitor large usage quantity, easily inhibitory action is produced to part copper nickel mineral and intergrowth particle, affect ambrose alloy recovery (Zhang Guofan etc. mineral products protection and development, 1999, (3): 28-31).
The present invention is according to the physical property feature containing magnesium silicate such as the enrichment discipline of copper nickel in copper nickel sulfide mineral and serpentine, the flotation chats of high serpentine content is processed separately, instead of be back to upper level flotation operation, decrease serpentine etc. and circulate in flotation flowsheet containing magnesium silicate.Meanwhile, flotation chats is carried out the process of selective acidleach de-magging at normal temperatures and pressures, while guarantee copper and mickel loss late is lower, obviously can reduces magnesian content in concentrate, improve the sorting index of copper nickel.
Summary of the invention
The object of this invention is to provide a kind of method improving copper nickel sulfide mineral flotation chats copper nickel recovery, enrichment discipline according to copper and mickel in copper nickel sulfide mineral floatation process and the physical property feature containing magnesium silicate, a certain amount of acid is used to carry out the process of selective acidleach de-magging to chats at normal temperatures and pressures, again flotation is carried out to chats, instead of be back to upper level flotation operation; This method reduce serpentine etc. containing magnesium silicate to the adverse effect of floatation process with decrease its circulation in flotation flowsheet, improve the recovery rate in ore-dressing of copper nickel.
The present invention realizes by following technical scheme:
(1) by after copper nickel sulfide mineral ore grinding, carry out routine and roughly select, scan with selected, selected and scan in process, cleaner tailings and scavenger concentrate are not back to the selected operation of upper level or scan operation, obtain copper nickel sulfide mineral high-grade concentrate, chats and mine tailing;
(2) use the hydrochloric acid of the concentrated sulfuric acid or mass percent concentration 15 ~ 25% to carry out the process of selective acidleach de-magging to chats, extraction temperature is normal temperature, and extraction time is 1 ~ 1.5h, and carry out Separation of Solid and Liquid after having leached, filtrate returns leaching, and leaching slag carries out flotation;
(3) by step (2) gained leaching slag add water size mixing to ore pulp mass percent concentration be 25 ~ 30%;
(4) flotation is carried out to step (3) gained ore pulp, flotation operation is divided into twice, first time flotation adds collecting agent 80 ~ 120g/t and foaming agent 40 ~ 60g/t sizes mixing, flotation is carried out after having sized mixing, the froth pulp of flotation is as low-grade concentrate, in groove, product carries out second time flotation, collecting agent 40 ~ 60g/t and foaming agent 20 ~ 30g/t is added equally in floatation process, froth pulp and the froth pulp of first time flotation of second time flotation merge common as low-grade concentrate, and in the groove of second time flotation, product is as tailing waste.
Described chats is scavenger concentrate and cleaner tailings.
The hydrochloric acid consumption of the described concentrated sulfuric acid or mass percent concentration 15 ~ 25% is 8 ~ 15kg/t, and the concentrated sulfuric acid is commercial products.
Described collecting agent is that ethyl xanthate is or/and butyl xanthate.
Described foaming agent is J-622.
The advantage of the present invention's existence compared with known technology:
1, the present invention is only for copper nickel sulfide mineral, after copper nickel sulfide mineral ore grinding, carry out conventional roughly selecting, concentrate and scanning, cleaner tailings and scavenger concentrate (flotation chats) are not back to upper level flotation operation, decrease difficult floating chats and containing the circulation of magnesium silicate in flotation flowsheet;
2, only carry out the process of selective acidleach de-magging to flotation chats, treating capacity is less, and cost is lower, reduces the content of MgO in concentrate simultaneously;
3, in leaching process, sour consumption is only 8 ~ 15kg/t, and extraction temperature is normal temperature, decreases the loss of copper nickel in leaching process;
4, by carrying out the process of selective acidleach de-magging to flotation chats, decreasing the use of inhibitor, improving flotation operation environment, improve the rate of recovery of main metallic nickel and copper;
5, this method technological process is reasonable, and flowage structure is simple, is easy to industrializing implementation.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is conventional process flow schematic diagram.
Detailed description of the invention
Below in conjunction with drawings and Examples, method of the present invention is described in further detail, but scope is not limited to described content.
Embodiment 1: ore sample is the copper nickel sulfide mineral in mining area, Jinchuan, Gansu, raw ore is containing Ni1.64%, Cu0.78%, MgO21%, and main gangue mineral is serpentine, talcum and olivine.
Copper nickel sulfide mineral accounts for 85.3% through muck ore grinding to fineness-0.074mm according to flow process shown in Fig. 1, add water size mixing to ore pulp mass percent concentration be 33%, then add inhibitor sodium metasilicate 1200g/t, collecting agent butyl xanthate 120g/t and foaming agent J-62260g/t to carry out stirring and size mixing, carry out after having sized mixing conventional roughly selecting, selected and scan, in selected groove product and the froth pulp scanned be not back to upper level roughly select, selected or scan operation, obtain high-grade nickel concentrate, chats and mine tailing;
Add concentrated sulfuric acid 10kg/t after being merged by chats and carry out selective acidleach de-magging, extraction time is 1h, after leaching completes, filtration obtains filtrate and leaching slag, filtrate returns leaching, leaching slag add water size mixing to ore pulp mass percent concentration be 28%, then collecting agent butyl xanthate 90g/t is added, foaming agent J-62240g/t sizes mixing, first time flotation is carried out after having sized mixing, flotation froth product is as low-grade concentrate, mine tailing is adding butyl xanthate 40g/t successively, second time flotation is carried out after foaming agent J-62220g/t sizes mixing, flotation froth product merges as low-grade concentrate with first time flotation froth product, in groove, product is as tailing waste, in final low-grade concentrate and high-grade concentrate, the overall recovery of Cu and Ni is respectively 79.73%, 90.02%, content of MgO 4.21%,
Adopt the technological process shown in Fig. 2, copper nickel sulfide mineral is accounted for 85.3% through muck ore grinding to fineness-0.074mm, add water size mixing to ore pulp mass percent concentration be 33%, then inhibitor sodium metasilicate 2000g/t is added successively, collecting agent butyl xanthate 120g/t and foaming agent J-62260g/t carries out stirring and sizes mixing, conventional roughly selecting is carried out after having sized mixing, selected and scan, selected and scan in process, product and scan froth pulp and be back to upper level and roughly select in cleaner cell, selected and scan operation, final acquisition copper-nickel concentrate and mine tailing two products, in concentrate, the overall recovery of Cu and Ni is respectively 77.32%, 86.42%, in concentrate, content of MgO is 6.8%.Visible, adopt this invention, in concentrate, magnesian content can be reduced to 4.21% by 6.8%, and improves copper nickel recovery 2.41 and 3.6 percentage points simultaneously, and in rougher process, the consumption of inhibitor sodium metasilicate is reduced to 1200g/t by 2000g/t.
Embodiment 2: ore sample is the copper nickel sulfide mineral in copper nickel district of Baima, Yunnan stockaded village, raw ore is on average containing Ni1.2%, Cu0.7%, MgO16.67%, and main gangue mineral is serpentine, chlorite, dolomite and quartz.
Copper nickel sulfide mineral according to flow process shown in Fig. 1, adds water and sizes mixing to ore pulp mass percent concentration to be 30%, then to add inhibitor sodium metasilicate 1600g/t successively, collecting agent ethyl xanthate 100g/t and foaming agent 2 after muck ore grinding accounts for 76.43% to fineness-0.074mm
#oil 40g/t carries out stirring and sizes mixing, and carries out conventional roughly selecting, selected and scan after having sized mixing, in selected groove product and the froth pulp scanned be not back to upper level roughly select, selected or scan operation, obtain high-grade nickel concentrate, chats and mine tailing;
Add concentrated sulfuric acid 8kg/t after being merged by flotation chats and carry out selective acidleach de-magging, extraction time is 1.5h, after leaching completes, filtration obtains filtrate and leaching slag, filtrate returns leaching, leaching slag add water size mixing to ore pulp mass percent concentration be 25%, then collecting agent ethyl xanthate 80g/t is added successively, foaming agent J-62250g/t sizes mixing, first time flotation is carried out after having sized mixing, flotation froth product is as low-grade concentrate, in groove, product adds ethyl xanthate 50g/t, second time flotation is carried out after foaming agent J-62225g/t sizes mixing, flotation froth product and first time flotation froth product merge common as low-grade concentrate, in groove, product is as tailing waste, in final low-grade concentrate and high-grade concentrate, the overall recovery of Cu and Ni is respectively 81.58%, 88.4%, content of MgO 3.8%.
Adopt the technological process shown in Fig. 2, copper nickel sulfide mineral is accounted for 76.43% through muck ore grinding to fineness-0.074mm, add water and size mixing to ore pulp mass percent concentration to be 30%, then to add inhibitor sodium metasilicate 3000g/t successively, collecting agent ethyl xanthate 100g/t and foaming agent 2
#oil 40g/t carries out stirring and sizes mixing, carry out after having sized mixing conventional roughly selecting, selected and scan, in cleaner cell product and scan froth pulp be back to upper level roughly select, selected and scan operation, final acquisition copper-nickel concentrate and mine tailing two products, in concentrate, the rate of recovery of Cu and Ni is respectively 78.86%, 85.4%, and in concentrate, content of MgO is 5.4%.Visible, adopt this invention, magnesian content in concentrate can be made to be reduced to 3.8% by 5.4%, and improve copper nickel recovery 2.72 and 3.0 percentage points simultaneously, in rougher process, the consumption of inhibitor sodium metasilicate is reduced to 1600g/t by 3000g/t.
Embodiment 3: ore sample is Xinjiang low grade copper-nickel sulphide ores, raw ore is on average containing Ni0.52%, Cu0.39%, MgO9.32%, and main gangue mineral is talcum, chlorite, dolomite and the tremolite.
Low grade copper-nickel sulphide ores according to flow process shown in Fig. 1 after muck ore grinding accounts for 82.34% to fineness-0.074mm, add water size mixing to ore pulp mass percent concentration be 32.3%, then inhibitor sodium metasilicate 2000g/t is added successively, collecting agent butyl xanthate 120g/t and foaming agent J-62260g/t carries out stirring and sizes mixing, carry out after having sized mixing conventional roughly selecting, selected and scan, in selected groove product and the froth pulp scanned be not back to upper level roughly select, selected or scan operation, obtain high-grade nickel concentrate, chats and mine tailing;
Add concentrated sulfuric acid 15kg/t after being merged by flotation chats and carry out selective acidleach de-magging, extraction time is 1.2h, after leaching completes, filtration obtains filtrate and leaching slag, filtrate returns leaching, leaching slag add water size mixing to ore pulp mass percent concentration be 30%, then collecting agent 110g/t(butyl xanthate 50g/t successively, ethyl xanthate 60g/t), foaming agent J-62260g/t sizes mixing, first time flotation is carried out after having sized mixing, flotation froth product is as low-grade concentrate, in groove, product adds collecting agent 60g/t(butyl xanthate 30g/t, ethyl xanthate 30g/t), second time flotation is carried out after foaming agent J-62230g/t sizes mixing, flotation froth product and first time flotation froth product merge common as low-grade concentrate, in groove, product is as tailing waste, in final low-grade concentrate and high-grade concentrate, the overall recovery of Cu and Ni is respectively 78.32%, 82.6%, content of MgO 4.34%.
Adopt the technological process shown in Fig. 2, copper nickel sulfide mineral is accounted for 82.34% through muck ore grinding to fineness-0.074mm, add water size mixing to ore pulp mass percent concentration be 32.3%, then inhibitor sodium metasilicate 3200g/t is added, collecting agent butyl xanthate 120g/t and foaming agent J-62260g/t carries out stirring and sizes mixing, conventional roughly selecting is carried out after having sized mixing, selected and scan, product and scan froth pulp and be back to upper level and roughly select in cleaner cell, selected and scan operation, final acquisition copper-nickel concentrate and mine tailing two products, in concentrate, the rate of recovery of Cu and Ni is respectively 74.43%, 78.26%, in concentrate, content of MgO is 5.16%.Visible, adopt this invention, magnesian content in concentrate can be made to be reduced to 4.34% by 5.16%, and improve copper nickel recovery 3.89 and 4.43 percentage points simultaneously, in rougher process, the consumption of inhibitor sodium metasilicate is reduced to 2000g/t by 3200g/t.
Embodiment 4: ore sample is the copper nickel sulfide mineral in copper nickel district of Baima, Yunnan stockaded village, raw ore is on average containing Ni1.2%, Cu0.7%, MgO16.67%, and main gangue mineral is serpentine, chlorite, dolomite and quartz.
Copper nickel sulfide mineral according to flow process shown in Fig. 1, adds water and sizes mixing to ore pulp mass percent concentration to be 30%, then to add inhibitor sodium metasilicate 1600g/t successively, collecting agent ethyl xanthate 100g/t and foaming agent 2 after muck ore grinding accounts for 76.43% to fineness-0.074mm
#oil 40g/t carries out stirring and sizes mixing, and carries out conventional roughly selecting, selected and scan after having sized mixing, in selected groove product and the froth pulp scanned be not back to upper level roughly select, selected or scan operation, obtain high-grade nickel concentrate, chats and mine tailing;
The hydrochloric acid 9kg/t adding mass percent concentration 20% after being merged by flotation chats carries out selective acidleach de-magging, extraction time is 1h, after leaching completes, filtration obtains filtrate and leaching slag, filtrate returns leaching, leaching slag add water size mixing to ore pulp mass percent concentration be 27%, then collecting agent ethyl xanthate 100g/t is added successively, foaming agent J-62245g/t sizes mixing, first time flotation is carried out after having sized mixing, flotation froth product is as low-grade concentrate, in groove, product adds ethyl xanthate 55g/t, second time flotation is carried out after foaming agent J-62225g/t sizes mixing, flotation froth product and first time flotation froth product merge common as low-grade concentrate, in groove, product is as tailing waste, in final low-grade concentrate and high-grade concentrate, the overall recovery of Cu and Ni is respectively 80.92%, 87.38%, content of MgO 4.21%.
Adopt the technological process shown in Fig. 2, copper nickel sulfide mineral is accounted for 76.43% through muck ore grinding to fineness-0.074mm, add water and size mixing to ore pulp mass percent concentration to be 30%, then to add inhibitor sodium metasilicate 3000g/t successively, collecting agent ethyl xanthate 100g/t and foaming agent 2
#oil 40g/t carries out stirring and sizes mixing, carry out after having sized mixing conventional roughly selecting, selected and scan, in cleaner cell product and scan froth pulp be back to upper level roughly select, selected and scan operation, final acquisition copper-nickel concentrate and mine tailing two products, in concentrate, the rate of recovery of Cu and Ni is respectively 78.86%, 85.4%, and in concentrate, content of MgO is 5.4%; Visible, adopt this invention, magnesian content in concentrate can be made to be reduced to 4.21% by 5.4%, and improve copper nickel recovery 2.06 and 1.98 percentage points simultaneously, in rougher process, the consumption of inhibitor sodium metasilicate is reduced to 1600g/t by 3000g/t.
Embodiment 5: ore sample is the copper nickel sulfide mineral in mining area, Jinchuan, Gansu, raw ore is containing Ni1.64%, Cu0.78%, MgO21%, and main gangue mineral is serpentine, talcum and olivine.
Copper nickel sulfide mineral accounts for 85.3% through muck ore grinding to fineness-0.074mm according to flow process shown in Fig. 1, add water size mixing to ore pulp mass percent concentration be 33%, then add inhibitor sodium metasilicate 1200g/t, collecting agent butyl xanthate 115g/t and foaming agent J-62255g/t to carry out stirring and size mixing, carry out after having sized mixing conventional roughly selecting, selected and scan, in selected groove product and the froth pulp scanned be not back to upper level roughly select, selected or scan operation, obtain high-grade nickel concentrate, chats and mine tailing;
The hydrochloric acid 15kg/t adding mass percent concentration 15% after being merged by chats carries out selective acidleach de-magging, extraction time is 1.5h, after leaching completes, filtration obtains filtrate and leaching slag, filtrate returns leaching, leaching slag add water size mixing to ore pulp mass percent concentration be 30%, then collecting agent butyl xanthate 90g/t is added, foaming agent J-62240g/t sizes mixing, first time flotation is carried out after having sized mixing, flotation froth product is as low-grade concentrate, mine tailing is adding butyl xanthate 40g/t successively, second time flotation is carried out after foaming agent J-62220g/t sizes mixing, flotation froth product merges as low-grade concentrate with first time flotation froth product, in groove, product is as tailing waste, in final low-grade concentrate and high-grade concentrate, the overall recovery of Cu and Ni is respectively 78.4%, 88.32%, content of MgO 4.86%,
Adopt the technological process shown in Fig. 2, copper nickel sulfide mineral is accounted for 85.3% through muck ore grinding to fineness-0.074mm, add water size mixing to ore pulp mass percent concentration be 33%, then inhibitor sodium metasilicate 2000g/t is added successively, collecting agent butyl xanthate 120g/t and foaming agent J-62260g/t carries out stirring and sizes mixing, conventional roughly selecting is carried out after having sized mixing, selected and scan, selected and scan in process, product and scan froth pulp and be back to upper level and roughly select in cleaner cell, selected and scan operation, final acquisition copper-nickel concentrate and mine tailing two products, in concentrate, the overall recovery of Cu and Ni is respectively 77.32%, 86.42%, in concentrate, content of MgO is 6.8%.Visible, adopt this invention, in concentrate, magnesian content can be reduced to 4.86% by 6.8%, and improves copper nickel recovery 1.08 and 1.9 percentage points simultaneously, and in rougher process, the consumption of inhibitor sodium metasilicate is reduced to 1200g/t by 2000g/t.
Claims (4)
1. improve a method for copper nickel sulfide mineral flotation chats copper nickel recovery, it is characterized in that concrete steps are as follows:
(1) by after copper nickel sulfide mineral ore grinding, carry out routine and roughly select, scan with selected, selected and scan in process, cleaner tailings and scavenger concentrate be not back to upper level roughly select, selected or scan operation, obtain copper nickel sulfide mineral high-grade concentrate, chats and mine tailing;
(2) use the hydrochloric acid of the concentrated sulfuric acid or mass percent concentration 15 ~ 25% to carry out the process of selective acidleach de-magging to chats, extraction temperature is normal temperature, and extraction time is 1 ~ 1.5h, and carry out Separation of Solid and Liquid after having leached, filtrate returns leaching, and leaching slag carries out flotation;
(3) by step (2) gained leaching slag add water size mixing to ore pulp mass percent concentration be 25 ~ 30%;
(4) flotation is carried out to step (3) gained ore pulp, flotation operation is divided into twice, first time flotation adds collecting agent 80 ~ 120g/t and foaming agent 40 ~ 60g/t sizes mixing, flotation is carried out after having sized mixing, the froth pulp of flotation is as low-grade concentrate, in groove, product carries out second time flotation, collecting agent 40 ~ 60g/t and foaming agent 20 ~ 30g/t is added equally in floatation process, froth pulp and the froth pulp of first time flotation of second time flotation merge common as low-grade concentrate, and in the groove of second time flotation, product is as tailing waste.
2. the method for raising copper nickel sulfide mineral flotation chats copper nickel recovery according to claim 1, is characterized in that: the hydrochloric acid consumption of the concentrated sulfuric acid or mass percent concentration 15 ~ 25% is 8 ~ 15kg/t.
3. the method for raising copper nickel sulfide mineral flotation chats copper nickel recovery according to claim 1 and 2, is characterized in that: collecting agent is that ethyl xanthate is or/and butyl xanthate.
4. the method for raising copper nickel sulfide mineral flotation chats copper nickel recovery according to claim 3, is characterized in that: foaming agent is J-622.
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