CN106824512B - A kind of beneficiation method improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio - Google Patents
A kind of beneficiation method improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio Download PDFInfo
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- CN106824512B CN106824512B CN201710240440.8A CN201710240440A CN106824512B CN 106824512 B CN106824512 B CN 106824512B CN 201710240440 A CN201710240440 A CN 201710240440A CN 106824512 B CN106824512 B CN 106824512B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 262
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 130
- 239000012141 concentrate Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000003513 alkali Substances 0.000 title claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- 150000001875 compounds Chemical class 0.000 title claims abstract description 27
- 238000007885 magnetic separation Methods 0.000 claims abstract description 55
- 238000005188 flotation Methods 0.000 claims abstract description 40
- 238000010410 dusting Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 14
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 14
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 14
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000012216 screening Methods 0.000 claims abstract description 8
- 229910001608 iron mineral Inorganic materials 0.000 claims abstract description 4
- 230000006698 induction Effects 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000006148 magnetic separator Substances 0.000 claims description 5
- 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 4
- YPJCVYYCWSFGRM-UHFFFAOYSA-H iron(3+);tricarbonate Chemical compound [Fe+3].[Fe+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O YPJCVYYCWSFGRM-UHFFFAOYSA-H 0.000 claims description 4
- 238000012797 qualification Methods 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 210000001367 artery Anatomy 0.000 claims 1
- 239000003814 drug Substances 0.000 claims 1
- 239000006246 high-intensity magnetic separator Substances 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000011707 mineral Substances 0.000 description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 description 10
- 239000004744 fabric Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 241000219991 Lythraceae Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 235000014360 Punica granatum Nutrition 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 240000001085 Trapa natans Species 0.000 description 1
- 235000014364 Trapa natans Nutrition 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- NWXHSRDXUJENGJ-UHFFFAOYSA-N calcium;magnesium;dioxido(oxo)silane Chemical compound [Mg+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O NWXHSRDXUJENGJ-UHFFFAOYSA-N 0.000 description 1
- 229910001748 carbonate mineral Inorganic materials 0.000 description 1
- JDEGMUDWFRGZDH-UHFFFAOYSA-N carbonic acid;iron Chemical compound [Fe].OC(O)=O JDEGMUDWFRGZDH-UHFFFAOYSA-N 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 229910052637 diopside Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052635 ferrosilite Inorganic materials 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001607 magnesium mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000009165 saligot Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- -1 scapolite Chemical compound 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910021646 siderite Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000008719 thickening Effects 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
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of beneficiation methods for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio, and high intensity magnetic separation iron ore concentrate is passed through dusting cover screening operation, obtain the lower qualified iron ore concentrate of sieve；Pre-classification-is fed to oversize and regrinds-high intensity magnetic separation process, throws and removes qualified tailings, obtains high intensity magnetic separation rough concentrate；Direct flotation operation is fed to high intensity magnetic separation rough concentrate, direct flotation iron ore concentrate is obtained, throws and remove qualified tailings, it is final to obtain TFe grade > 58.5%, SiO2The mixing iron ore concentrate of content<4%, alkali than>=0.9.The present invention has many advantages, such as finally to mix that iron ore concentrate beneficial element calcium-magnesium content is high, impurity sial content is low, iron recovery is high, alkali is than high, the loss of particulate iron mineral is small, index is stablized, reagent consumption amount is few, reduce the pollution to environment, energy conservation and consumption reduction effects are obvious.
Description
Technical field
The invention belongs to iron ore dressing technical fields, and in particular to iron essence is improved in a kind of carbonate containing iron ore dressing
The method of alkali ratio in mine, particularly suitable for improve raw ore TFe grade between 40.0%-48.0%, that ferric carbonate accounts for iron mineral is total
Measure the high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio 15% or more.
Background technique
Iron-bearing mineral mainly has magnetic iron ore, half martite, martite, water chestnut in the compound iron ore of hydrochlorate containing high-carbon
Iron ore, pyrite etc.；Gangue mineral mainly has carbonate mineral, chlorite, kaolin, quartz, scapolite, diopside, pomegranate
Sub- stone etc..The process flow that ore dressing at present uses throws tail through two-stage crushing, magnetic, gravity treatment for mill head in advance, obtains rough concentrate
The floating system of mill is fed after fine crushing, -0.076mm content is up to 68% or so after closed circuit grinding, then through floatation desulphurization, low intensity magnetic separation -
High intensity magnetic separation is that (TFe grade > 57%, alkali is 0.75) than about for final iron ore concentrate after dropping phosphorus, thickening filtration dehydration.As digging is to downward
It stretches, magnetic mineral content decline, red (brown) iron ore, siderite ratio rise in raw ore, will further result in iron ore concentrate ferrous grade
With the decline of alkali ratio.
Alkali ratio=(CaO+MgO)/(SiO of ore2+Al2O3), refer to the basic anhydride and acidic oxidation in ore
The ratio of object is acid drift if alkali ratio < 0.5；0.5 < alkali ratio < 0.8 is half self-fluxing ore, 0.8 < alkali ratio < 1.2, for certainly
Fusibleness ore, this kind of ore is not required to addition in ironmaking processes or adds flux less, therefore claims self-fluxing ore.It has reduction coke
The advantages of consumption, the raising capacity factor of a blast furnace is to smelt the higher ore of economic effect.Therefore, in a certain range, suitably
Iron ore concentrate alkali ratio is improved, it is advantageous to smelting.
Weak magnetic-high intensity magnetic separation process that the compound iron ore of hydrochlorate containing high-carbon uses, weak magnetic, high intensity magnetic separation are all used and are repeatedly sorted,
Inferior fine magnetite concentrate merges the iron ore concentrate for obtaining Iron grade > 57% with high intensity magnetic mineral.Because of the SiO in inferior fine magnetite concentrate2Content is very
It is low, therefore to improve the alkali ratio of final iron ore concentrate, then it needs to reduce the SiO in high intensity magnetic mineral2、Al2O3Content.
High intensity magnetic mineral drop sial generally use have dusting cover-regrind-high intensity magnetic separation process process (technique one), high intensity magnetic mineral just
Flotation process (technique two).
The advantages of spun yarn evenness-high intensity magnetic separation process process (technique one) itself, has: (1) using dusting cover, iron concentrate grade can
1.0-2.5 percentage points is improved, or even improves 3-4 percentage points；(2) it is beneficial to prevent overground phenomenon.Dusting cover operation can incite somebody to action
Qualified grain size sifts out in advance, and oversize is regrinded, and process configuration is relatively reasonable.
Disadvantage is that: (1) iron ore of fine grain teeth cloth is difficult to handle, the dusting cover used in the production of iron ore mine
Minimum screen size is 0.076mm, and the thinner ore of disseminated grain size has no the industrial practice using this technique；(2) strong magnetic
It selects process mechanism to be mingled with seriously, causes dusting cover oversize to regrind rear high intensity magnetic mineral Iron grade low, SiO2Content is high, if passing through drop
Low high intensity magnetic separation magnetic field strength improves high intensity magnetic mineral grade, then tailings grade is high, and metal loss is serious.
The advantages of high intensity magnetic mineral direct floatation process process (technique two) itself, has: technical maturity, and index is stablized, operation letter
It is single, the ore of suitable treatment fine grain teeth cloth, the advantages that capable of partially taking into account the recycling of calcic magnesium mineral；But there is also flotation tailings
The excessively high disadvantage of Iron grade, cause the iron ore concentrate rate of recovery low.
Summary of the invention
The purpose of the present invention is to the above-mentioned problems in the prior art, and provide a kind of process flow it is simple,
Sharpness of separation is high, the mixing iron ore concentrate rate of recovery is high and is suitable for the processing of the high-carbon hydrochlorate compound iron ore of fine grain teeth cloth, can
Improve the beneficiation method of high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio.
Above-mentioned purpose to realize the present invention, a kind of choosing for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio of the present invention
Mine method the technical solution adopted is that: first to high-carbon hydrochlorate compound iron ore carry out ore grinding, weak magnetic-high intensity magnetic separation, obtain TFe
Grade >=64.5%, SiO2High intensity magnetic separation iron of the weak magnetic separation iron concentrate and TFe grade of content≤2.5% in 38.5-41.0% is smart
Mine, it is characterised in that also use following technique:
1) high intensity magnetic separation iron ore concentrate passes through dusting cover screening operation, obtains the lower qualified iron ore concentrate of sieve, the screen size of the dusting cover
Control qualification iron ore concentrate TFe grade >=43.5%, SiO under sieve2Content≤7.7%；
2) oversize obtained to step 1) feeds pre-classification-and regrinds-high intensity magnetic separation process, throws and removes qualified tailings, obtains
Obtain high intensity magnetic separation rough concentrate；The overflow granularity of pre-classification is controlled in -0.076mm 85-90%；
3) the high intensity magnetic separation rough concentrate obtained to step 2) feeds direct flotation operation, obtains direct flotation iron ore concentrate, throws except qualification
Tailing, number, pH regulator dosage, collector dosage by adjusting direct flotation, control direct flotation iron ore concentrate TFe grade >=
43.0%, SiO2Content≤7.9%；
4) by qualified iron ore concentrate, step 3) obtain under sieve that weak magnetic separation iron concentrate, step 1) obtain direct flotation iron ore concentrate
Merge and obtains TFe grade > 58.5%, SiO2The final mixing iron ore concentrate of content<4%, alkali than>=0.9.
The high intensity magnetic separation equipment that the step 2) uses is advisable with vertical ring pulsating high gradient intensity magnetic separator, magnetic induction intensity model
It is trapped among 0.28-0.35 tesla, preferably 0.29-0.32 tesla.
Direct flotation operation in the step 3), is preferred using one roughing, once purging selection.
It for pH regulator, petroleum sodium sulfonate is collecting agent that the direct flotation roughing, which uses sulfuric acid,；According to flotation to mine
Dry mine meter, preferable dosing are as follows: direct flotation roughing pH regulator dosage is 1200-1500g/t, collector dosage is
300-400g/t, direct flotation scan the collecting agent that 130-160g/t is added in operation again.
Under normal circumstances, the dusting cover screening operation uses screen size for the high frequency fine screen of 0.1mm；The step
2) pre-classification in uses hydrocyclone, and the overflow granularity of pre-classification is controlled in -0.076mm 85-90%, high intensity magnetic separation
The magnetic induction intensity of the high intensity magnetic separation equipment used in technique is 0.3T；Direct flotation scans operation and adds 150g/t's again in step 3)
Collecting agent.
The occurrence of the parameters such as above-mentioned dusting cover screen size, grinding particle size, magnetic induction intensity, dosing, can basis
Ore properties are determined by laboratory results, but need to guarantee TFe grade > 58.5%, the SiO that finally mix iron ore concentrate2Contain
Measure<4%, alkali ratio>=0.9.
Compared with prior art, a kind of beneficiation method tool for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio of the present invention
It has the following advantages:
1. using dusting cover screening that can obtain accounting for high intensity magnetic separation first the high intensity magnetic separation iron ore concentrate of the compound iron ore of hydrochlorate containing high-carbon
Qualified iron ore concentrate under the sieve of iron ore concentrate amount 60% realizes " can receive early receipts ", the mine amount of subsequent processing is greatly reduced, is conducive to
It is energy-saving.
2. dusting cover oversize is regrinded-high intensity magnetic separation, and can be thrown except most tailings.
3. high intensity magnetic separation rough concentrate can get the direct flotation iron ore concentrate of fraction fine grain teeth cloth through direct flotation, iron is improved
The rate of recovery.
4., using high intensity magnetic separation rough concentrate direct flotation, having evaded high intensity magnetic separation selectivity compared with the technique one in background technique
The disadvantage of difference mainly plays it and is suitable for the characteristics of throwing tail；And the selectively good feature of direct flotation is played.
5., due to regrinding-strong magnetic-direct flotation process integration using dusting cover-, can be dropped compared with the technique two in background technique
Low tailing TFe grade improves metal recovery rate.And the mine amount of the processing of direct flotation is greatly lowered, and just corresponds to high intensity magnetic separation iron essence
The 25% of mine amount, advantageously reduces reagent consumption, reduces environmental pollution, and is conducive to environmental protection.
Detailed description of the invention
Fig. 1 is a kind of principle technique stream for the beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio of the present invention
Cheng Tu.
Fig. 2 is that a kind of embodiment for the beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio of the present invention flows entirely
Number of passes quality process figure.
Specific embodiment
It is of the invention for description, with reference to the accompanying drawings and examples to a kind of raising high-carbon hydrochlorate compound iron ore iron of the present invention
The beneficiation method of concentrate alkali ratio is described in further details.
High-carbon hydrochlorate compound iron ore sample is derived from Jiangsu iron ore, and raw ore chemistry multielement analysis result is shown in Table 1 respectively,
Fe clusters analysis the results are shown in Table 2.
1 high-carbon hydrochlorate compound iron ore chemistry multielement analysis result of table
2 high-carbon hydrochlorate compound iron ore Fe clusters of table analyze result
| Mineral name | Iron phase iron-content (%) | Occupation rate (%) |
| Magnetic iron ore | 27.94 | 59.64 |
| Red (brown) iron ore | 9.04 | 19.30 |
| Ferric carbonate | 7.71 | 16.46 |
| Ferrosilite | 1.03 | 2.20 |
| Iron sulfide | 1.13 | 2.41 |
| Quan Tie | 46.85 | 100.00 |
It can be seen that by table 1, table 2, the high-carbon hydrochlorate compound iron ore impurity is more, and silicon, aluminium, sulphur, phosphorus, potassium, sodium are main miscellaneous
Prime element, useful iron mineral mainly recyclable is magnetic iron ore, red (brown) iron ore and ferric carbonate in ore, due to belonging to magnet
Mine, red (brown) iron ore, carbonic acid iron ore are total to association, and target minreal is more, and impurity element is more, increases and sorts difficulty.
A kind of principle for the beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio of the present invention as shown in Figure 1
Process flow chart and a kind of reality for the beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio of the present invention shown in Fig. 2
It applies a whole process number quality process figure to find out, the present invention plants the beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio
Using following technique, step:
(1) tcrude ore ore grinding, low intensity magnetic separation-high intensity magnetic separation operation
Ore grinding, low intensity magnetic separation (one thick, sweep)-high intensity magnetic separation (one is thick, two sweep) are carried out to high-carbon hydrochlorate compound iron ore first,
Grinding particle size is -0.076mm65%, obtains TFe grade >=64.5%, SiO2The weak magnetic separation iron concentrate and TFe of content≤2.5%
High intensity magnetic separation iron ore concentrate of the grade in 38.5-41.0%.Low intensity magnetic separation uses permanent-magnet drum type magnetic separator, and the magnetic induction intensity of roughing is
0.15-0.17 tesla, the magnetic induction intensity scanned are 0.38-0.42 tesla；High intensity magnetic separation is strong using vertical ring pulsating high gradient
The magnetic induction intensity of magnetic separator, strong magnetic roughing is 0.18-0.23 tesla, and the magnetic induction intensity that strong magnetic is scanned is respectively 0.24-
0.26 tesla, 0.28-0.33 tesla.
(2) high intensity magnetic separation iron ore concentrate dusting cover operation
High intensity magnetic separation iron ore concentrate passes through dusting cover screening operation, obtains the lower qualified iron ore concentrate of sieve, the screen size control of the dusting cover
System qualification iron ore concentrate TFe grade >=43.5%, SiO under sieve2Content≤7.7%；Dusting cover screening operation use screen size for
The high frequency fine screen of 0.1mm.
(3) dusting cover oversize pre-classification-regrinds-high intensity magnetic separation operation
Dusting cover oversize is fed into hydrocyclone with pump and carries out pre-classification, overflow granularity is controlled in -0.076mm
85-90%, sand setting enter ball mill and are regrinded, and ball mill ore discharging return hydrocyclone forms closed circuit；Hydrocyclone overflows
Stream feeds high intensity magnetic separation, throws except most of tailing, obtains high intensity magnetic separation rough concentrate；The equipment that high intensity magnetic separation uses is vertical ring pulsating high gradient
Intensity magnetic separator, magnetic induction intensity range are preferred in 0.28-0.35 tesla with 0.3 tesla.
(4) high intensity magnetic separation rough concentrate feeds to the direct flotation operation of one roughing, once purging selection, obtain direct flotation iron ore concentrate,
It throws and removes qualified tailings, number, pH regulator dosage, collector dosage by adjusting direct flotation control direct flotation iron ore concentrate TFe
Grade >=43.0%, SiO2Content≤7.9%；It for pH regulator, petroleum sodium sulfonate is collecting agent that direct flotation roughing, which uses sulfuric acid,；
According to flotation to the dry mine meter of mine: direct flotation roughing pH regulator dosage is 1200-1500g/t, collector dosage 300-
400g/t, direct flotation scan the collecting agent that 150g/t is added in operation again.
(5) weak magnetic separation iron concentrate, the lower qualified iron ore concentrate of sieve, direct flotation iron ore concentrate are merged obtain TFe grade > 58.5%,
SiO2The final mixing iron ore concentrate of content<4%, alkali than>=0.9.
The final mixing iron ore concentrate TFe grade that the embodiment of the present invention obtains is up to 58.99%, SiO2Content 3.97%, iron
The rate of recovery > 88.0%, alkali ratio can be improved by 0.75 to 0.98, and final mixing iron ore concentrate becomes self-fluxing nature mine from half self-fluxing ore
Stone.Iron ore concentrate chemistry multielement analysis the results are shown in Table 3.
The total iron ore concentrate chemistry multielement analysis result of table 3
| Lab work | TFe | SFe | FeO | SiO2 | Al2O3 | CaO |
| Content (%) | 58.99 | 58.62 | 20.73 | 3.97 | 0.46 | 2.93 |
| Lab work | MgO | S | P | K2O | Na2O | Scaling loss (Ig) |
| Content (%) | 1.42 | 0.26 | 0.11 | 0.084 | 0.051 | 7.87 |
For self-fluxing nature Iron concentrate.
According further to sintering formula: TFe*100/ (100-Ig-CaO-MgO)=67.20% illustrates that the high-carbon hydrochlorate mixes
Although the low sial iron ore concentrate Iron grade of high contents of calcium and magnesium that iron ore obtains is lower, it is sintered index and is equivalent to Iron grade 67.2%
Acid fine iron breeze, smelting performance is excellent.
Claims (3)
1. a kind of beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio, the high-carbon hydrochlorate compound iron ore
TFe grade between 40.0%-48.0%, ferric carbonate account for iron mineral total amount 15% or more；To high-carbon hydrochlorate mixing iron ore
Stone carries out ore grinding, weak magnetic-high intensity magnetic separation, obtains TFe grade >=64.5%, SiO2The weak magnetic separation iron concentrate and TFe of content≤2.5%
High intensity magnetic separation iron ore concentrate of the grade in 38.5-41.0%, it is characterised in that also use following technique:
1) high intensity magnetic separation iron ore concentrate passes through dusting cover screening operation, obtains the lower qualified iron ore concentrate of sieve, the screen size control of the dusting cover
Qualification iron ore concentrate TFe grade >=43.5%, SiO under sieve2Content≤7.7%；
2) oversize obtained to step 1) feeds pre-classification-and regrinds-high intensity magnetic separation process, throws and removes qualified tailings, obtains strong
Magnetic separation rough concentrate；The overflow granularity of pre-classification is controlled in -0.076mm 85-90%；The high intensity magnetic separation equipment used is vertical ring arteries and veins
Dynamic High gradient high intensity magnetic separator, magnetic induction intensity range is in 0.28-0.35 tesla；
3) the high intensity magnetic separation rough concentrate obtained to step 2) feeds direct flotation operation, obtains direct flotation iron ore concentrate, throws and remove qualified tailings,
Number, pH regulator dosage, collector dosage by adjusting direct flotation, control direct flotation iron ore concentrate TFe grade >=43.0%,
SiO2Content≤7.9%；
Direct flotation operation in the step 3), using one roughing, once purging selection；The direct flotation roughing uses sulfuric acid
It is collecting agent for pH regulator, petroleum sodium sulfonate；According to flotation to the dry mine meter of mine: direct flotation roughing pH regulator dosage is
1200-1500g/t, collector dosage 300-400g/t, direct flotation scan the collecting agent that 130-160g/t is added in operation again；
4) the direct flotation iron ore concentrate that qualified iron ore concentrate, step 3) obtain under sieve that weak magnetic separation iron concentrate, step 1) obtain is merged
Obtain TFe grade > 58.5%, SiO2The final mixing iron ore concentrate of content<4%, alkali than>=0.9；
Above-mentioned steps 1) dusting cover screen size, 2) grinding particle size regrinded, the magnetic induction intensity of step, the medicament of step 3) uses
The occurrence of amount can be determined by laboratory results according to ore properties, but need to guarantee finally to mix iron ore concentrate
TFe grade > 58.5%, SiO2Content<4%, alkali ratio>=0.9.
2. a kind of beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio as described in claim 1, feature
Be: the magnetic induction intensity range for the vertical ring pulsating high gradient intensity magnetic separator that the step 2) uses 0.29-0.32 it is special this
It draws.
3. a kind of beneficiation method for improving high-carbon hydrochlorate compound iron ore iron ore concentrate alkali ratio as claimed in claim 1 or 2, special
Sign is: the dusting cover screening operation uses screen size for the high frequency fine screen of 0.1mm；Dividing in the step 2) in advance
Grade uses hydrocyclone, and the magnetic induction intensity of the high intensity magnetic separation equipment used in high intensity magnetic separation process is 0.3T；It top-ups in step 3)
The collecting agent that 150g/t is added in operation again is scanned in choosing.
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| CN107029868A (en) * | 2017-06-16 | 2017-08-11 | 鞍钢集团矿业有限公司 | A kind of composite ore high pressure roller mill, double media, the red ore deposit sorting process of magnetic |
| CN107552220B (en) * | 2017-08-30 | 2020-04-10 | 玉溪大红山矿业有限公司 | Safe ore screening optimization process capable of effectively improving yield of concentrate |
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| CN112207037A (en) * | 2020-09-22 | 2021-01-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving TFe grade of vanadium titano-magnetite iron ore concentrate |
| CN112774854B (en) * | 2021-02-03 | 2022-09-30 | 核工业北京化工冶金研究院 | Method for reducing leaching acid consumption of clay uranium ore |
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