CN107243409A - A kind of high-sulfur magnetic iron ore puies forward the beneficiation method of iron sulfur reduction - Google Patents
A kind of high-sulfur magnetic iron ore puies forward the beneficiation method of iron sulfur reduction Download PDFInfo
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- CN107243409A CN107243409A CN201710624926.1A CN201710624926A CN107243409A CN 107243409 A CN107243409 A CN 107243409A CN 201710624926 A CN201710624926 A CN 201710624926A CN 107243409 A CN107243409 A CN 107243409A
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- sulfur
- iron ore
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- magnetic iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 229
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 114
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 48
- 239000011593 sulfur Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 37
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 102000005298 Iron-Sulfur Proteins Human genes 0.000 title claims abstract description 21
- 108010081409 Iron-Sulfur Proteins Proteins 0.000 title claims abstract description 21
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000005188 flotation Methods 0.000 claims abstract description 36
- 238000007885 magnetic separation Methods 0.000 claims abstract description 36
- 239000012141 concentrate Substances 0.000 claims abstract description 33
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000004088 foaming agent Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 14
- 229910052683 pyrite Inorganic materials 0.000 claims abstract description 12
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011028 pyrite Substances 0.000 claims abstract description 12
- 239000003002 pH adjusting agent Substances 0.000 claims abstract description 11
- 238000010926 purge Methods 0.000 claims abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 24
- 230000006698 induction Effects 0.000 claims description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 239000006148 magnetic separator Substances 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims 1
- 238000001802 infusion Methods 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 7
- 239000012190 activator Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 3
- 238000006467 substitution reaction Methods 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 229910052635 ferrosilite Inorganic materials 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 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 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052952 pyrrhotite Inorganic materials 0.000 description 1
- 229910021646 siderite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses the beneficiation method that a kind of high-sulfur magnetic iron ore puies forward iron sulfur reduction, for the ore dressing of raw ore TFe grades are between 55%~59%, TS contents are between 3%~4% high-sulfur magnetic iron ore, using following technique, step：(1) high-sulfur magnetic iron ore ore grinding, classification low intensity magnetic separation operation；(2) one step flotation removing pyrite operations, use butyl xanthate for the collecting agent of pyrite, and 2# oil is foaming agent；(3) two step flotation removing magnetic iron ore operations, using one roughing, once purging selection, use oxalic acid for pH adjuster and the activator of magnetic iron ore, and butyl xanthate is the collecting agent of magnetic iron ore, and 2# oil is foaming agent.The present invention has the advantages that iron ore concentrate TFe grades are high, objectionable impurities S contents are low, production stable, safe and efficient, reduces security risk；Using oxalic acid (solid) the substitution concentrated sulfuric acid as pH adjuster and magnetic iron ore activator, operation is simple in production, safety and reliability.
Description
Technical field
The invention belongs to iron ore dressing technical field, and in particular to a kind of iron ore puies forward the beneficiation method of iron sulfur reduction, special
Be not suitable for processing raw ore TFe grades between 55%-59%, TS contents between 3-4%, wherein using the sulphur of magnetic iron ore as
Main high-sulfur magnetic iron ore.
Background technology
Impurity sulfur content is high in magnetite concentrate, will directly affect the quality of ironmaking, steel-making, also has harm to blast fumance,
Therefore the impurity sulfur content in stove iron ore concentrate should be strictly controlled, typically requires TS<0.30%.
High-sulfur magnetic iron ore carry that iron sulfur reduction generally uses for ore grinding-magnetic-floating combined process flow, i.e., first by raw ore ore grinding to conjunction
Suitable grinding particle size, first throws tail with low intensity magnetic separation, obtains the qualified magnetite concentrate of Iron grade, then magnetite concentrate progress reverse flotation is taken off
Sulphur.
Ore grinding-magnetic-floating the advantage of combined process flow in itself has：(1) tail is thrown in first low intensity magnetic separation, obtains the magnetic for meeting Iron grade requirement
Iron ore concentrate, and greatly reduce the treating capacity of follow-up flotation；(2) floatation desulphurization mature technology, index is excellent.
It is disadvantageous in that：The addition concentrated sulfuric acid, which is sized mixing and cleans hardly possible, during magnetite concentrate floatation desulphurization floats magnetic iron ore table
Face, is allowed to after sulfide mineral collector is added, is floated, so as to realize the purpose of iron ore concentrate sulfur reduction.Concentrated sulfuric acid addition exists
Operational control difficulty is big in production, easily causes security incident.Such as in December, 2005, Tongling Nonferrous Metals Dongguashan Copper Mine ore dressing plant adds
Motorized adjustment ball valve locator failure in sour control system, causes ball valve to be in open position, the concentrated sulfuric acid is poured out, mistake
Vigorous reaction occurs for sulfide moment in ore pulp in the sulfuric acid and tank diameter of amount, a large amount of hydrogen sulfide gas is produced, in result in
The generation of malicious accident, causes 4 dead 6 wounds.
《Modern Mineral》" certain iron ore carries iron sulfur reduction beneficiation test " that 1st phase in 2014 delivers, be for certain iron ore
Sulfur-containing magnetite stone, the problem of final iron ore concentrate Iron grade that the existing production technology in ore dressing plant is obtained is relatively low, sulfur content is higher is right
Raw ore has carried out ore-dressing technique research, using raw ore stage grinding-floating sulphur-weak magnetic separation process of low intensity magnetic separation-bis- section magnetic essence, obtains
Higher Iron grade and the qualified iron ore concentrate of sulfur content were obtained, iron concentrate grade reaches more than 63%, and contains the sulphur in iron ore concentrate
Amount is reduced to less than 0.6%.But the technique is also that difficult floating Surface of Pyrrhotite is sized mixing and cleaned using the concentrated sulfuric acid, is not only existed
Potential safety hazard, and the sulfur content of the iron ore concentrate finally obtained is still higher.
The content of the invention
The purpose of the present invention aiming at the above-mentioned problems in the prior art, and provide a kind of technological process it is simple,
Iron concentrate grade is high, desulfurized effect is good and safe and efficient high-sulfur magnetic iron ore puies forward the beneficiation method of iron sulfur reduction.
To realize the above-mentioned purpose of the present invention, what the beneficiation method that a kind of high-sulfur magnetic iron ore of the invention puies forward iron sulfur reduction was used
Technical scheme is：
A kind of high-sulfur magnetic iron ore of the present invention puies forward the beneficiation method of iron sulfur reduction, for raw ore TFe grades 55%~59%
Between, the ore dressing of high-sulfur magnetic iron ore of the TS contents between 3%~4%, described sulfur mineral based on magnetic iron ore, use
Following technique, step：
(1) high-sulfur magnetic iron ore ore grinding, classification-low intensity magnetic separation operation
First to the progress ore grinding-classification-low intensity magnetic separation of high-sulfur magnetic iron ore, acquisition TFe grade >=69.0%, TS contents≤
3.0% weak magnetic separation iron concentrate, discharges low intensity magnetic separation mine tailing.
This step, gangue mineral of not only dishing out, the grade for improving iron in weak magnetic separation iron concentrate, while also by most of weak magnetic
Property pyrite throw remove.
(2) one step flotation removing pyrite operations
The weak magnetic separation iron concentrate of TFe grade >=69.0%, TS content≤3.0% is fed into the yellow iron of step flotation operation removing
Ore deposit, obtains TFe grade >=69.5%, the bottom land product of TS content≤1.5%.
A described step flotation uses butyl xanthate for the collecting agent of pyrite, and 2# oil is foaming agent；According to flotation to ore deposit
Ore deposit gauge is done, dosing is：Butyl xanthate consumption is 350~450g/t, and foaming agent 2# oil consumptions are 25~35g/t.
This step, further increases Iron grade, and throw the yellow iron except entering in step (1) in weak magnetic separation iron concentrate
Ore deposit.
(3) two step flotation removing magnetic iron ore operations
Bottom land product in step (2) is fed into two step flotation operations removing magnetic iron ore, TFe grades are obtained>70.0%th,
TS contents<0.30% desulfurization iron ore concentrate；
Two described step flotation use one roughing, once purging selection, use oxalic acid for pH adjuster and magnetic iron ore
Activator, butyl xanthate is the collecting agent of magnetic iron ore, and 2# oil is foaming agent；Dry ore deposit gauge according to flotation to ore deposit, roughing pH value
Regulator 850~1200g/t of consumption of oxalic acid, collecting agent butyl xanthate consumption be 400~500g/t, foaming agent 2# oil consumption be 26~
35g/t；Collecting agent butyl xanthate consumption is scanned for 120~180g/t, foaming agent 2# oil consumptions are 18~23g/t.
This step, brings up to more than 70%, and throw except step (2) is entered in bottom land product by final iron concentrate grade
Magnetic iron ore.
In step (1), the classifying equipoment used is advisable with hydrocyclone, and overflow granularity is controlled in -0.076mm82%
~92% is preferred, and preferable overflow granularity control is 85%~90%.
In step (1), weak magnetic separation equipment uses permanent-magnet drum type magnetic separator, and low intensity magnetic separation flow is one roughing, once essence
Elect good as；The magnetic induction control of roughing is advisable in 0.17~0.20 tesla's scope, selected magnetic induction control
0.15~0.165 tesla's scope is preferred.
Dosing in step (2) is preferably：Butyl xanthate consumption is 380~420g/t, and foaming agent 2# oil consumptions are 28
~32g/t；
Dosing in step (3) is preferably：Roughing pH adjuster 950~1050g/t of consumption of oxalic acid, collecting agent fourth
Xanthate consumption is 430~470g/t, and foaming agent 2# oil consumptions are 28~32g/t；Scan collecting agent butyl xanthate consumption for 140~
160g/t, foaming agent 2# oil consumption are 19~21g/t.
In actual applications, suitable technological parameter is：In step (1), weak magnetic separation equipment uses permanent-magnet chamber type magnetic separation
Machine, low intensity magnetic separation flow is one roughing, primary cleaning；The magnetic induction intensity of roughing is 0.18 tesla, and selected magnetic induction is strong
Spend for 0.16 tesla；Dosing in step (2) is：Butyl xanthate consumption is 400g/t, and foaming agent 2# oil consumptions are 30g/
t；Dosing in step (3) is：Roughing pH adjuster 950~1000g/t of consumption of oxalic acid, collecting agent butyl xanthate consumption is
450g/t, foaming agent 2# oil consumption are 30g/t；Collecting agent butyl xanthate consumption is scanned for 150g/t, foaming agent 2# oil consumptions are
20g/t。
The occurrence of the parameters such as above-mentioned grinding particle size, magnetic induction intensity, flotation number of times, dosing, can be according to ore
Property, is determined by laboratory results.
Compared with prior art, the beneficiation method that a kind of high-sulfur magnetic iron ore of the invention puies forward iron sulfur reduction has the following advantages that：
(1) low intensity magnetic separation, stepped-flotation separation sulfur reduction is respectively adopted.Low intensity magnetic separation operation is thrown except the weak magnetic of sulfur-bearing total amount 40% or so
Select mine tailing, and the Iron grade more than 69.0% that raw ore TFe grades are brought up between 55%~59% in weak magnetic separation iron concentrate；
Stepped-flotation separation sulfur reduction is used to weak magnetic separation iron concentrate, after a step flotation, the sulfur content for entering two step flotation is only weak magnetic separation iron concentrate
The sulfide content acted in about the 50% of middle sulfur content, follow-up ore pulp after acid adding with strong acid is reduced, and security risk is greatly lowered.
(2) using oxalic acid (solid powder) as pH adjuster and magnetic iron ore activator, operated in production simpler
Easy, security risk is minimum.
(3) technological process is simple, and beneficiation cost is low, TFe grades in desulfurization iron ore concentrate>70.0%th, TS contents<0.30%,
Good product quality, the market competitiveness is strong, and the price of iron ore concentrate per ton is higher by 30% than the iron ore concentrate of the TFe grades 65% or so of import
More than, achieve unexpected technique effect, economic effect.
Brief description of the drawings
Fig. 1 is the principle process chart for the beneficiation method that a kind of high-sulfur magnetic iron ore of the invention puies forward iron sulfur reduction.
Fig. 2 is the embodiment whole process number quality process for the beneficiation method that a kind of high-sulfur magnetic iron ore of the invention puies forward iron sulfur reduction
Figure.
Embodiment
For the description present invention, the choosing of iron sulfur reduction is proposed to a kind of high-sulfur magnetic iron ore of the invention with reference to the accompanying drawings and examples
Ore deposit method is described in further details.
High-sulfur magnetic iron ore used is derived from Mongolia in the present embodiment, and raw ore chemistry multielement analysis the results are shown in Table 1, iron
Material phase analysis the results are shown in Table 2, and sulphur material phase analysis the results are shown in Table 3.
The high-sulfur magnetic iron ore of table 1 chemistry multielement analysis result
| Lab work | TFe | SiO2 | Al2O3 | CaO | MgO |
| Content (%) | 57.52 | 4.86 | 1.19 | 3.88 | 3.23 |
| TS | SS | P | K2O | Na2O | CuO |
| 3.82 | 3.38 | 0.06 | 0.32 | 0.04 | 0.03 |
The high-sulfur magnetic iron ore Fe clusters analysis result of table 2
| Mineral name | Iron phase iron-holder | Occupation rate | Remarks |
| The iron of magnetic iron ore | 50.67 | 87.79 | Armco magnetic iron |
| The iron of magnetic iron ore | 3.30 | 5.72 | Armco magnetic iron |
| The iron of bloodstone | 1.82 | 3.15 | |
| The iron of siderite | 0.90 | 1.56 | |
| The iron of ferrosilite | 0.22 | 0.38 | |
| The iron of pyrite | 0.81 | 1.40 | |
| Quan Tie | 57.72 | 100.00 |
The high-sulfur magnetic iron ore sulphur material phase analysis result (%) of table 3
| It is separate | Content | Occupation rate |
| Elemental sulfur | 0.01 | 0.26 |
| The sulphur of magnetic sulfide | 2.33 | 61.64 |
| The sulphur of other sulfide | 0.98 | 25.93 |
| The sulphur of sulfate | 0.46 | 12.16 |
| Full sulphur | 3.78 | 100.00 |
Analyzed from original ore property, raw ore Iron grade is higher, reach major impurity TS contents in 57.52%, but raw ore
Up to 3.82%, and wherein 61.64% presence in the form of magnetic iron ore, magnetic iron ore belongs to strongly magnetic mineral, in low intensity magnetic separation
During enter in the lump in inferior fine magnetite concentrate with magnetic iron ore, therefore magnetic iron ore can not be removed using single low intensity magnetic separation, it is necessary to using floating
Choosing removing.
A kind of high-sulfur magnetic iron ore as shown in Figure 1 carries principle process chart and Fig. 2 institutes of the beneficiation method of iron sulfur reduction
The embodiment whole process number quality process figure for the beneficiation method that a kind of high-sulfur magnetic iron ore of invention shown puies forward iron sulfur reduction finds out, this hair
The beneficiation method that a kind of bright high-sulfur magnetic iron ore puies forward iron sulfur reduction uses following technique, step：
(1) high-sulfur magnetic iron ore ore grinding, classification-low intensity magnetic separation operation
Ore grinding-classification-low intensity magnetic separation is carried out to high-sulfur magnetic iron ore first, classification uses hydrocyclone, overflow granularity for-
0.076mm85%-90%；Low intensity magnetic separation uses permanent-magnet drum type magnetic separator, and low intensity magnetic separation flow is one roughing, primary cleaning, roughing
Magnetic induction intensity be 0.18 tesla, selected magnetic induction intensity is 0.16 tesla；Obtain TFe grade >=69.0%, TS
The weak magnetic iron ore concentrate of content≤3.0%.
(2) one step flotation removing pyrite operations
The weak magnetic iron ore concentrate of TFe grade >=69.0% in step (1), TS content≤3.0% is fed into a step flotation operation
Remove pyrite.One step flotation operation uses one roughing, and it is foaming agent for pyrite collecting agent, 2# oil to use butyl xanthate；Press
Dry ore deposit gauge according to flotation to ore deposit, a step flotation collector butyl xanthate consumption is that the oily consumption of 400g/t, foaming agent 2# is 30g/t.
(3) two step flotation removing magnetic iron ore operations
Bottom land product in step (2) is fed into two step flotation operations removing magnetic iron ore.Two step flotation operations use one
Secondary roughing, once purging selection.Two step flotation use that oxalic acid is pH adjuster and magnetic iron ore activator, butyl xanthate are magnetic iron ore
Collecting agent, 2# oil are foaming agent；Dry ore deposit gauge according to flotation to ore deposit, roughing pH adjuster consumption of oxalic acid 1000g/t, collecting
Agent butyl xanthate consumption is that the oily consumption of 450g/t, foaming agent 2# is 30g/t；It is 150g/t, foaming to scan collecting agent butyl xanthate consumption
Agent 2# oil consumptions are 20g/t.
Using iron ore concentrate TFe grades after stepped-flotation separation desulfuration>70.0%, TS content<0.30%.
The oxalic acid that the present invention is used is solid powdery product.
Claims (5)
1. a kind of high-sulfur magnetic iron ore puies forward the beneficiation method of iron sulfur reduction, for raw ore TFe grades between 55%~59%, TS contains
The ore dressing of the high-sulfur magnetic iron ore between 3%~4% is measured, described sulfur mineral is based on magnetic iron ore, it is characterised in that adopt
With following technique, step：
(1) high-sulfur magnetic iron ore ore grinding, classification-low intensity magnetic separation operation
Ore grinding-classification-low intensity magnetic separation is carried out to high-sulfur magnetic iron ore first, TFe grade >=69.0%, TS content≤3.0% is obtained
Weak magnetic separation iron concentrate, discharge low intensity magnetic separation mine tailing；
(2) one step flotation removing pyrite operations
The weak magnetic separation iron concentrate of TFe grade >=69.0%, TS content≤3.0% is fed into step flotation operation removing pyrite,
Obtain TFe grade >=69.5%, the bottom land product of TS content≤1.5%；
A described step flotation uses butyl xanthate for the collecting agent of pyrite, and 2# oil is foaming agent；Dry ore deposit according to flotation to ore deposit
Gauge, dosing is：Butyl xanthate consumption is 350~450g/t, and foaming agent 2# oil consumptions are 25~35g/t；
(3) two step flotation removing magnetic iron ore operations
Bottom land product in step (2) is fed into two step flotation operations removing magnetic iron ore, TFe grades are obtained>70.0%th, TS contains
Amount<0.30% desulfurization iron ore concentrate；
Two described step flotation use one roughing, once purging selection, use oxalic acid for the activation of pH adjuster and magnetic iron ore
Agent, butyl xanthate is the collecting agent of magnetic iron ore, and 2# oil is foaming agent；Dry ore deposit gauge according to flotation to ore deposit, the adjustment of roughing pH value
Agent 850~1200g/t of consumption of oxalic acid, collecting agent butyl xanthate consumption is 400~500g/t, and foaming agent 2# oil consumptions are 26~35g/
t；Collecting agent butyl xanthate consumption is scanned for 120~180g/t, foaming agent 2# oil consumptions are 18~23g/t.
2. a kind of high-sulfur magnetic iron ore as claimed in claim 1 puies forward the beneficiation method of iron sulfur reduction, it is characterised in that：In step
(1) in, the classifying equipoment used is hydrocyclone, and overflow granularity is controlled in -0.076mm82%~92%.
3. a kind of high-sulfur magnetic iron ore as claimed in claim 2 puies forward the beneficiation method of iron sulfur reduction, it is characterised in that：In step
(1) in, weak magnetic separation equipment uses permanent-magnet drum type magnetic separator, and low intensity magnetic separation flow is one roughing, primary cleaning；The magnetic induction of roughing
Intensity is 0.17~0.20 tesla, and selected magnetic induction intensity is 0.15~0.165 tesla.
4. a kind of high-sulfur magnetic iron ore as described in claim 1,2 or 3 puies forward the beneficiation method of iron sulfur reduction, it is characterised in that：
Dosing in step (2) is：Butyl xanthate consumption is 380~420g/t, and foaming agent 2# oil consumptions are 28~32g/t；
Dosing in step (3) is：Roughing pH adjuster 950~1050g/t of consumption of oxalic acid, collecting agent butyl xanthate consumption
For 430~470g/t, foaming agent 2# oil consumptions are 28~32g/t；Collecting agent butyl xanthate consumption is scanned for 140~160g/t, is risen
Infusion 2# oil consumptions are 19~21g/t.
5. a kind of high-sulfur magnetic iron ore as described in claim 1,2 or 3 puies forward the beneficiation method of iron sulfur reduction, it is characterised in that：
In step (1), weak magnetic separation equipment uses permanent-magnet drum type magnetic separator, and low intensity magnetic separation flow is one roughing, primary cleaning；Slightly
The magnetic induction intensity of choosing is 0.18 tesla, and selected magnetic induction intensity is 0.16 tesla；
Dosing in step (2) is：Butyl xanthate consumption is 400g/t, and foaming agent 2# oil consumptions are 30g/t；
Dosing in step (3) is：Roughing pH adjuster 950~1000g/t of consumption of oxalic acid, collecting agent butyl xanthate consumption
For 450g/t, foaming agent 2# oil consumptions are 30g/t；Collecting agent butyl xanthate consumption is scanned for 150g/t, foaming agent 2# oil consumptions are
20g/t。
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