CN104028369B - A kind of low-grade refractory that improves selects the beneficiation method of speculum iron recovery rate in ore-dressing - Google Patents
A kind of low-grade refractory that improves selects the beneficiation method of speculum iron recovery rate in ore-dressing Download PDFInfo
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- CN104028369B CN104028369B CN201410245867.3A CN201410245867A CN104028369B CN 104028369 B CN104028369 B CN 104028369B CN 201410245867 A CN201410245867 A CN 201410245867A CN 104028369 B CN104028369 B CN 104028369B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000011084 recovery Methods 0.000 title claims abstract description 19
- 238000006396 nitration reaction Methods 0.000 claims abstract description 51
- 239000012141 concentrate Substances 0.000 claims abstract description 39
- 238000007885 magnetic separation Methods 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 230000006698 induction Effects 0.000 claims description 15
- 239000006148 magnetic separator Substances 0.000 claims description 9
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000498 ball milling Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 12
- 230000004044 response Effects 0.000 description 10
- 241000196324 Embryophyta Species 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005188 flotation Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052635 ferrosilite Inorganic materials 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 2
- 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 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 235000010921 Betula lenta Nutrition 0.000 description 1
- 240000001746 Betula lenta Species 0.000 description 1
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 239000006246 high-intensity magnetic separator Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000012545 processing Methods 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
- 238000012958 reprocessing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of low-grade refractory that improves and select the beneficiation method of speculum iron recovery rate in ore-dressing, the technique, the step that use be: by the low-grade spiegel Ore of Iron grade >=28.0% through broken ore grinding to 0.076mm 82 88%, roughly selects through one section of strong magnetic and obtains a stages of magnetic separation iron ore concentrate in advance；Strong magnetic rougher tailings is scanned I, one section of strong magnetic through one section of strong magnetic and is scanned the continuous magnetic concentration working of II, one section of high intensity magnetic separation mine tailing of dishing out；One section of strong magnetic is scanned I, one section of strong magnetic and is scanned the concentrate merging of II, regrind to 0.043mm 86 94%, roughly select through the strong magnetic of two-stage nitration again, the strong magnetic of two-stage nitration scans I, the strong magnetic of two-stage nitration scan II continuous magnetic concentration working, after two-stage nitration high intensity magnetic separation mine tailing of dishing out, it is thus achieved that two-stage nitration magnetic separation of iron ore concentrate.This technique both can shift to an earlier date obtaining portion deciliter lattice iron ore concentrate, the Iron grade of can dishing out the in advance again mine tailing less than 10%, and entering two-stage nitration ball milling ore deposit amount (chats) can be greatly decreased, and mill can be greatly lowered and select energy consumption.
Description
Technical field
The present invention relates to the beneficiation method of a kind of iron ore, especially relate to a kind of low-grade refractory choosing
The beneficiation method of spiegel Ore, is particularly well-suited to process the low-grade of Iron grade 29.0-33.0%
Spiegel Ore, it is possible to obtain Iron grade >=49.5%, the high scaling loss spiegel of iron recovery >=75.0%
Concentrate.
Background technology
Speculum iron also falls within hematite, according to the production practices at home of this type of Ore, and classical work
Process flow has two kinds, and one is stage grinding-thickness grading-weight-magnetic-floating combined process flow, mainly
Apply at the neat dashan concentrator of Anshan iron and steel plant, East Anshan ore dressing plant, ore dressing plant, Hu Jia mausoleum, Hebei Si Jia
Battalion ore dressing plant, Li Lou ore dressing plant, Huoqiu County etc., its advantage is coarse and fine separation, it is achieved that narrow rank enters
The reasonable process of choosing, takes out part coarse-grain coarse ore concentrate under the conditions of thicker grinding particle size, it is achieved that
Can receive and early receive；Another kind is stage grinding-strong magnetic-reverse flotation flowsheet, is mainly used in Anshan iron and steel plant and adjusts
Jun Tai ore dressing plant, ore dressing plant, Taiyuan Iron and Steel Co. Yuan Jia village etc., its advantage is reasonable flowsheet structure, compact,
Relatively strong to the adaptability of ore properties change, produce stable.The drawback of above two flow process also shows
And be clear to, one is to be all combined process flow, and flowage structure is complex；Two is all to obtain by flotation
Obtaining qualified iron extract mine producation, flotation needs to use floating agent, if mine tailing wastewater is mishandling,
Easily pollute environment, be unfavorable for the construction of friendly environment society.
" certain speculum iron ore-dressing technique experimental study " of publication " Chinese Mining Industry " in February, 2012
In one literary composition, describe the beneficiation test result to certain speculum iron in detail.According to the document, raw ore
Middle iron-bearing mineral is mainly speculum iron and bloodstone, and raw ore is milled to fineness-200 mesh 95%, adopts
Sort with shaking table and can obtain 64.28%, the response rate be only 19.52% iron ore concentrate；Use once
Roughly select, primary cleaning and the strong magnetic flux journey of once purging selection, grade 61.71% can be obtained, reclaim
The iron ore concentrate of rate 45.35%；By strong magnet-gravity, grade 61.64%, the response rate can be obtained
The iron ore concentrate of only 17.80%；By strong magnetic-reverse flotation, it is thus achieved that iron concentrate grade 66.62
%, the better index of the response rate 58.38%.But this technology iron mineral response rate is low, causes
The serious waste of resource.
In addition to above several flow processs, single high intensity magnetic separation flow process also can be used to process speculum iron.
But often due to technological parameter selects unreasonable, causing iron concentrate grade low, iron recovery is also
Low.
Summary of the invention
The purpose of the present invention is aiming at the above-mentioned problems in the prior art, and provides a kind of
Improve low-grade refractory and select the beneficiation method of speculum iron recovery rate in ore-dressing, utilize this beneficiation method, both
Obtaining portion deciliter lattice iron ore concentrate can be shifted to an earlier date, mine tailing of can dishing out again, and ore grinding energy consumption is low, no
Only can improve iron concentrate grade, the iron ore concentrate response rate more can be greatly improved.
For realizing the above-mentioned purpose of the present invention, one of the present invention improves low-grade refractory and selects speculum iron to select
The beneficiation method of the ore deposit response rate is achieved through the following technical solutions.
A kind of low-grade refractory that improves of the present invention selects the beneficiation method of speculum iron recovery rate in ore-dressing, uses
Technique, step be: by the low-grade spiegel Ore of Iron grade >=28.0% through broken-one section
Ore grinding, to the fineness of-0.076mm 82-88%, is roughly selected through one section of strong magnetic and is obtained a stages of magnetic separation in advance
Iron ore concentrate；Strong magnetic rougher tailings is scanned I, one section of strong magnetic through one section of strong magnetic and is scanned the continuous magnetic of II
It is elected to be industry, one section of high intensity magnetic separation mine tailing of dishing out；One section of strong magnetic is scanned I, one section of strong magnetic and is scanned II
Concentrate merges, and is milled to the fineness of-0.043mm 86-94% by secondary grinding operation, then passes through
The strong magnetic of two-stage nitration is roughly selected, the strong magnetic of two-stage nitration scans I, the strong magnetic of two-stage nitration scan II continuous magnetic concentration working,
Dishing out after two-stage nitration high intensity magnetic separation mine tailing, acquisition two-stage nitration strong magnetic rougher concentration, the strong magnetic of two-stage nitration are scanned respectively
The strong magnetic of I concentrate, two-stage nitration scans II concentrate；One stages of magnetic separation iron ore concentrate and two-stage nitration strong magnetic rougher concentration,
The strong magnetic of two-stage nitration scans I concentrate, the strong magnetic of two-stage nitration is scanned II concentrate and is incorporated as total iron ore concentrate；Described
One section of strong magnetic roughly select, one section of strong magnetic is scanned I, one section of strong magnetic and is scanned II and all use the high ladder of pulsation
Degree intensity magnetic separator, magnetic induction is respectively 0.18-0.22T, 0.65-0.75T, 0.75-0.9T；
The strong magnetic of described two-stage nitration is roughly selected, the strong magnetic of two-stage nitration scans I, the strong magnetic of two-stage nitration is scanned II and is also adopted by pulsation
High gradient high intensity magnetic separator, magnetic induction is in 0.25-0.35T scope.
The Iron grade of described spiegel Ore is preferred in 29.0-33.0% scope；Described one section
The mog of ore grinding be-0.076mm 83-87% scope, described secondary grinding ore grinding thin
Degree is advisable for-0.043mm 88-92% scope.
Above-mentioned one section of strong magnetic is roughly selected, one section of strong magnetic is scanned I, one section of strong magnetic and scanned the magnetic induction of II
Intensity more suitably scope is respectively 0.19-0.21T, 0.68-0.72T, 0.78-0.82T；
The strong magnetic of described two-stage nitration is roughly selected, the strong magnetic of two-stage nitration scans I, the strong magnetic of two-stage nitration scan II magnetic induction strong
Spending size preferably is 0.28-0.32T.
One section of described strong magnetic is roughly selected, one section of strong magnetic is scanned I, one section of strong magnetic and scanned the magnetic strength of II
It is optimal for answering intensity to be respectively 0.2T, 0.7T, 0.8T；The strong magnetic of described two-stage nitration roughly selects, two
The strong magnetic of section scans I, the strong magnetic of two-stage nitration is scanned the magnetic induction of II and is the most preferably all 0.3T；Institute
The pulsating high gradient intensity magnetic separator stated is that Ganzhou gold ring Slon-750 type founds ring pulsating high gradient magnetic
Select machine.
The present invention is a kind of improve low-grade refractory select the beneficiation method of speculum iron recovery rate in ore-dressing use with
Have the advantage that after upper technical scheme
(1) this technique both can shift to an earlier date obtaining portion deciliter lattice iron ore concentrate, can dish out in advance again
The Iron grade mine tailing less than 10%, entering two-stage nitration ball milling ore deposit amount (chats) can be greatly decreased, permissible
Mill is greatly lowered and selects energy consumption.
(2) middling regrinding and reprocessing use low magnetic induction the strong magnetic of two-stage nitration roughly select, two-stage nitration strong
Magnetic scans I, the strong magnetic of two-stage nitration scan II substep magnetic separation process, not only can improve iron concentrate grade,
The iron ore concentrate response rate more can be greatly improved.
(3) all magnetic plants all use pulsating high gradient intensity magnetic separator, it is simple to in-site installation
And operational management.
Accompanying drawing explanation
Fig. 1 is that a kind of low-grade refractory that improves of the present invention selects the ore dressing side of speculum iron recovery rate in ore-dressing
Several quality process figures of method.
Detailed description of the invention
For describing the present invention, with embodiment, one of the present invention is improved low-grade below in conjunction with the accompanying drawings
Difficulty selects the beneficiation method of speculum iron recovery rate in ore-dressing to further describe.
The Ore processed in the present embodiment is wine steel mirror ferrum mahogany birch tree ditch fine ore, and raw ore Iron grade is
31.40%, belong to the speculum iron of extremely difficult choosing.
Raw ore is carried out multielement analysis and Fe clusters analysis, the results are shown in Table 1, table 2.
Table 1 raw ore chemistry multielement analysis result
| Lab work | TFe | SFe | FeO | SiO2 | Al2O3 | CaO |
| Content (%) | 31.25 | 30.85 | 9.10 | 24.94 | 3.72 | 0.97 |
| Lab work | MgO | S | P | K2O | Na2O | Scaling loss |
| Content (%) | 1.48 | 0.99 | 0.009 | 1.16 | 0.026 | 10.89 |
| Lab work | MnO | Cu | Zn | TiO2 | V | Cr/Ni |
| Content (%) | 1.02 | 0.019 | 0.044 | 0.28 | 0.009 | 0.002/0.007 |
Table 2 raw ore Fe clusters analysis result
| Mineral name | Ferrum phase iron-holder (%) | Occupation rate (%) |
| Magnetic iron ore | 0.11 | 0.35 |
| Red (brown) iron mine | 27.66 | 87.95 |
| Ferric carbonate | 3.17 | 10.08 |
| Ferrosilite | 0.31 | 0.98 |
| Iron sulfide | <0.2 | 0.64 |
Analysis result shows, in Ore, main valuable mineral is hematite-limonite, is secondly magnetic iron ore,
Ferric carbonate, ferrosilite and pyrite content are relatively low, and the ferrum of hematite-limonite accounts for 87.95%.Harmful
Sulfur impurity content is 0.99%, and phosphorus content is relatively low, (CaO+MgO)/(SiO2+Al2O3)=0.085,
For acid drift.
A kind of low-grade refractory that improves as shown in Figure 1 selects the ore dressing side of speculum iron recovery rate in ore-dressing
Several quality process figures of method are found out, the spiegel Ore of Iron grade 31.40% is through broken-ore grinding extremely
-0.076mm 85%, test uses the Slon-750 strong magnetomechanical of type pulsating high gradient, thick through strong magnetic
Choosing can obtain productivity 25.41%, Iron grade 50.92%, the iron ore concentrate of iron recovery 41.21%；
Rougher tailings is scanned through twice, and discardable productivity is 31.28%, Iron grade 9.60%, ferrum reclaim
The mine tailing of rate 9.56%.One section of strong magnetic is roughly selected, one section strong magnetic once purging selection, one section strong magnetic secondary
The magnetic field intensity scanned is respectively 0.2T, 0.7T, 0.8T.Result of the test is shown in Table 3.
3 one sections of high intensity magnetic separations one of table thick two sweep checking result of the test (%)
Strong magnetic chats (scanning comprehensive concentrate) is regrinded to-0.043mm 90%, thick through the strong magnetic of two-stage nitration
Choosing, two-stage nitration strong magnetic once purging selection, two-stage nitration strong magnetic secondary are scanned, and testing equipment uses Slon-750
The strong magnetomechanical of type pulsating high gradient, can obtain again productivity be 22.11%, Iron grade 48.00%, ferrum
The iron ore concentrate of the response rate 33.80%.Result of the test is shown in Table 4.
Table 4 two-stage nitration high intensity magnetic separation one thick two sweeps result of the test (%)
The final iron ore concentrate productivity obtained is 47.52%, Iron grade 49.56%, iron recovery
75.01%.
Additionally, primary grinding product is also used drum magnetic separator to roughly select by test, work as magnetic strength
Answer intensity also for 0.2T time, it is thus achieved that the response rate roughly selecting iron ore concentrate less than 6%；Work as magnetic induction
When intensity brings up to 0.4T, although magnetic induction is far above 0.2T, but obtain roughly select ferrum
The response rate of concentrate, still less than 10%, uses the strong magnetomechanical of pulsating high gradient to carry out far below the present invention
One section of strong magnetic roughly selects the mineral processing index of the iron recovery 41.21% of acquisition, got purpose less than
Technique effect.
Up to the present, it is the relatively low of 0.18-0.22T, 0.25-0.32T at magnetic induction
In the case of, it is all to use drum magnetic separator, does not the most use the precedent of the strong magnetomechanical of pulsating high gradient.
Claims (5)
1.
A kind of low-grade refractory that improves selects the beneficiation method of speculum iron recovery rate in ore-dressing, it is characterised in that use following technique, step: by the low-grade spiegel Ore of Iron grade >=28.0% through broken-primary grinding to-0.076mm
82-88%, roughly selects through one section of strong magnetic and obtains a stages of magnetic separation iron ore concentrate in advance；Strong magnetic rougher tailings is scanned I, one section of strong magnetic through one section of strong magnetic and is scanned the continuous magnetic concentration working of II, one section of high intensity magnetic separation mine tailing of dishing out；One section of strong magnetic is scanned I, one section of strong magnetic and is scanned the concentrate merging of II, it is milled to-0.043mm 86-94% by secondary grinding operation, roughly select through the strong magnetic of two-stage nitration again, the strong magnetic of two-stage nitration scans I, the strong magnetic of two-stage nitration scan II continuous magnetic concentration working, dish out after two-stage nitration high intensity magnetic separation mine tailing, obtain two-stage nitration strong magnetic rougher concentration respectively, the strong magnetic of two-stage nitration scans I concentrate, the strong magnetic of two-stage nitration scans II concentrate；One stages of magnetic separation iron ore concentrate is with two-stage nitration strong magnetic rougher concentration, the strong magnetic of two-stage nitration scan I concentrate, the strong magnetic of two-stage nitration is scanned II concentrate and is incorporated as total iron ore concentrate；One section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic and scanned II and all use pulsating high gradient intensity magnetic separator, and magnetic induction is respectively 0.18-0.22T, 0.65-0.75T, 0.75-0.9T；The strong magnetic of described two-stage nitration is roughly selected, the strong magnetic of two-stage nitration scans I, the strong magnetic of two-stage nitration is scanned II and is also adopted by pulsating high gradient intensity magnetic separator, and magnetic induction is in 0.25-0.35T scope.
2.
A kind of low-grade refractory that improves as claimed in claim 1 selects the beneficiation method of speculum iron recovery rate in ore-dressing, it is characterised in that: described difficulty selects the Iron grade of speculum iron to be 29.0-33.0%；The mog of described primary grinding is-0.076mm 83-87%；The mog of described secondary grinding is-0.043mm 88-92%.
A kind of low-grade refractory that improves the most as claimed in claim 1 or 2 selects the beneficiation method of speculum iron recovery rate in ore-dressing, it is characterised in that: one section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic and scanned the magnetic induction of II and be respectively 0.19-0.21T, 0.68-0.72T, 0.78-0.82T；The strong magnetic of described two-stage nitration is roughly selected, the strong magnetic of two-stage nitration scans I, to scan the magnetic induction of II be 0.28-0.32T to the strong magnetic of two-stage nitration.
A kind of low-grade refractory that improves the most as claimed in claim 3 selects the beneficiation method of speculum iron recovery rate in ore-dressing, it is characterised in that: one section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic and scanned the magnetic induction of II and be respectively 0.2T, 0.7T, 0.8T；The strong magnetic of described two-stage nitration is roughly selected, the strong magnetic of two-stage nitration scans I, the strong magnetic of two-stage nitration is scanned the magnetic induction of II and is all 0.3T.
A kind of low-grade refractory that improves the most as claimed in claim 3 selects the beneficiation method of speculum iron recovery rate in ore-dressing, it is characterised in that: described pulsating high gradient intensity magnetic separator is Ganzhou gold ring Slon-750 type pulsating high gradient magnetic separator with vertical ring.
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| CN111841883A (en) * | 2020-07-31 | 2020-10-30 | 攀钢集团矿业有限公司 | Strong magnetic separation method of ilmenite |
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