CN109158204A - A kind of high-sulfur bloodstone selects iron sulphur removal enrichment method - Google Patents
A kind of high-sulfur bloodstone selects iron sulphur removal enrichment method Download PDFInfo
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- CN109158204A CN109158204A CN201810713923.XA CN201810713923A CN109158204A CN 109158204 A CN109158204 A CN 109158204A CN 201810713923 A CN201810713923 A CN 201810713923A CN 109158204 A CN109158204 A CN 109158204A
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- flotation
- tailing
- iron
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- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 52
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 48
- 239000011593 sulfur Substances 0.000 title claims abstract description 44
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000012141 concentrate Substances 0.000 claims abstract description 186
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 152
- 238000005188 flotation Methods 0.000 claims abstract description 85
- 229910052742 iron Inorganic materials 0.000 claims abstract description 70
- 238000007885 magnetic separation Methods 0.000 claims abstract description 47
- 239000011019 hematite Substances 0.000 claims abstract description 46
- 229910052595 hematite Inorganic materials 0.000 claims abstract description 46
- 238000005119 centrifugation Methods 0.000 claims abstract description 43
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000005864 Sulphur Substances 0.000 claims abstract description 14
- 239000004115 Sodium Silicate Substances 0.000 claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 12
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 10
- 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 9
- 239000011734 sodium Substances 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 230000010349 pulsation Effects 0.000 claims description 8
- 239000002516 radical scavenger Substances 0.000 claims description 8
- 239000000344 soap Substances 0.000 claims description 8
- 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 claims description 7
- 230000005484 gravity Effects 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 4
- 239000004088 foaming agent Substances 0.000 claims description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 4
- 239000011028 pyrite Substances 0.000 claims description 3
- 229910052683 pyrite Inorganic materials 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 14
- 239000011707 mineral Substances 0.000 abstract description 14
- 238000007796 conventional method Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 231100001261 hazardous Toxicity 0.000 description 9
- 238000011084 recovery Methods 0.000 description 9
- 239000000686 essence Substances 0.000 description 5
- 210000001367 artery Anatomy 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
Landscapes
- Centrifugal Separators (AREA)
Abstract
Iron sulphur removal enrichment method is selected the present invention relates to a kind of high-sulfur bloodstone, belongs to technical field of mineral processing.High-sulfur bloodstone raw ore or high-sulfur bloodstone rough concentrate be crushed, sieve by the present invention, ore grinding, is classified to -0.074mm and accounts for 75 ~ 85% and obtain fine fraction bloodstone or fine fraction bloodstone rough concentrate II, and the progress pulsating high gradient magnetic separation roughing of fine fraction bloodstone is obtained bloodstone rough concentrate I and pulsating magnetic selection tailing；Bloodstone rough concentrate I and/or fine fraction bloodstone rough concentrate II carry out centrifugation high-gradient magnetic separation and obtain centrifugation High-gradient Magnetic concentrate selection and be centrifuged magnetic tailing；According to the actual situation, will centrifugation High-gradient Magnetic concentrate selection to carry out table concentration, flotation selected or not selected obtain hematite concentrate.The present invention is directed to " pulsating high gradient roughing-centrifugation high-gradient magnetic separation-flotation or table concentration are selected " technique of high-sulfur bloodstone, compared with traditional handicraft, keep the removal of sulphur more thorough, the more difficult magnetic iron ore removed of conventional method can be removed, obtain superior sorting index.
Description
Technical field
Iron sulphur removal enrichment method is selected the present invention relates to a kind of high-sulfur bloodstone, belongs to technical field of mineral processing.
Background technique
China's bloodstone is resourceful, but universal Iron grade is low, harmful element sulphur is exceeded.However, iron-smelting raw material is generally wanted
Iron grade is asked to be greater than 50%, sulfur content is even lower less than 1%, therefore China's overwhelming majority bloodstone resource, it is necessary to further
Make enrichment except sulphuring treatment could utilize.Traditional bloodstone selects iron desulfurization process general are as follows: tail-is thrown in pulsating high gradient magnetic separation roughing
Gravity treatment or flotation are selected.But sulfur content is higher, especially have part sulphur in the form of magnetic iron ore in the presence of, traditional handicraft is difficult to reduce
Sulfur content is to criterion of acceptability.Sulphur removal is carried out according to pulsating high gradient roughing-gravity separation technology, the selected stream of gravity treatment for needing complicated Cen long
Cheng Caineng keeps sulfur content up to standard, and cost will be significantly greatly increased and reduce iron recovery；According to pulsating high gradient roughing-flotation work
Skill, since magnetic iron ore has part magnetism, and floatability is poor, and the technique is more difficult to be down to criterion of acceptability for sulfur content.
Currently, still lacking a kind of low cost and be effectively treated the high-sulfur bloodstone containing magnetic iron ore select iron sulphur removal enrichment side
Method.
Summary of the invention
For the above-mentioned problems of the prior art and deficiency, what the present invention provided a kind of high-sulfur bloodstone selects iron sulphur removal rich
Set method, the present invention are directed to " pulsating high gradient magnetic separation-centrifugation high-gradient magnetic separation " operation of bloodstone, and select according to the actual situation
It selects and carries out selected operation, Iron grade and sulfur content qualified hematite concentrate up to standard can be obtained.
Technical solution of the present invention: the rough concentrate of the raw ore of high-sulfur bloodstone or high-sulfur bloodstone is crushed, is sieved,
Ore grinding is classified to -0.074 mm and accounts for 75 ~ 85% and obtains fine fraction bloodstone or fine fraction bloodstone rough concentrate II, then will classification
Fine fraction bloodstone afterwards carries out pulsating high gradient magnetic separation roughing, abandons a large amount of gangue minerals and obtains bloodstone rough concentrate；It will
Bloodstone rough concentrate and/or fine fraction bloodstone rough concentrate II are through being centrifuged high-gradient magnetic separation, the centrifugation for the sulfur-containing impurities that are removed
High-gradient Magnetic concentrate selection；According to the actual situation, will centrifugation High-gradient Magnetic concentrate selection through further table concentration or flotation it is selected or
Without selected, qualified hematite concentrate is finally obtained.
A kind of high-sulfur bloodstone selects iron sulphur removal enrichment method, the specific steps are as follows:
(1) high-sulfur bloodstone raw ore be crushed, sieved, ore grinding, be classified to -0.074mm and account for 75 ~ 85% to obtain fine fraction red
Iron ore；
(2) the fine fraction bloodstone of step (1) is subjected to pulsating high gradient magnetic separation roughing and obtains bloodstone rough concentrate I and pulsation magnetic
Select tailing；Pulsating high gradient magnetic separation roughing can abandon a large amount of gangue minerals；
(3) rough concentrate of high-sulfur bloodstone be crushed, sieved, ore grinding, be classified to -0.074mm and account for 75 ~ 85% and obtain particulate
Grade bloodstone rough concentrate II；
(4) the fine fraction bloodstone rough concentrate II of the bloodstone rough concentrate I of step (2) and/or step (3) is carried out being centrifuged high ladder
Degree magnetic separation obtains centrifugation High-gradient Magnetic concentrate selection and is centrifuged cleaner tailings；Centrifugation high gradient can both remove sulphur impurity, can also be into
One step promotes concentrate Iron grade；
(5) if the Iron grade of the centrifugation High-gradient Magnetic concentrate selection of step (4) is not less than 50%, it is centrifuged High-gradient Magnetic concentrate selection i.e.
Centrifugation magnetic tailing for hematite concentrate, step (4) merges to obtain tailing with the pulsating magnetic selection tailing of step (2)；If step
(4) granularity -0.074mm is not low lower than 50% and in centrifugation High-gradient Magnetic concentrate selection for the Iron grade of centrifugation High-gradient Magnetic concentrate selection
In 80%, then carry out that flotation is selected to obtain hematite concentrate and flotation tailing, flotation tailing, step (4) centrifugation cleaner tailings with
The pulsating magnetic selection tailing of step (2) merges to obtain tailing；If the Iron grade of the centrifugation High-gradient Magnetic concentrate selection of step (4) is lower than
50% and centrifugation High-gradient Magnetic concentrate selection in granularity -0.074mm be lower than 80%, then carry out table concentration and obtain hematite concentrate and shaking
Bed gravity tailings, table concentration tailing, step (4) centrifugation cleaner tailings merge to obtain with the pulsating magnetic selection tailing of step (2)
Tailing；
Sulphur in the high-sulfur bloodstone mainly exists in the form of pyrite and/or magnetic iron ore；
Magnetic field strength is 0.8 ~ 1.0T in pulsating high gradient roughing in the step (2)；
It is 0.5 ~ 0.7 T that the centrifugation High-gradient Magnetic, which chooses magnetic field strength, and centrifugal intensity is 4 ~ 6g, and wherein g is gravity value；
It is that a roughing flotation obtains flotation rough concentrate and rougher tailings that flotation is selected in the step (5), and rougher tailings carries out
Flotation scans scavenger concentrate chats and to scan tailing, flotation rough concentrate carry out flotation it is selected selected concentrate and cleaner tailings,
Scavenger concentrate and cleaner tailings, which merge, returns to roughing flotation process；If the grade of iron in the selected obtained selected concentrate of a flotation
Not less than 50%, then selected concentrate is hematite concentrate；If the grade of iron is lower than in the selected obtained selected concentrate of a flotation
50%, then increase the grade of the selected iron into n-th flotation selected obtained n times selected concentrate of n times flotation not less than 50%, then the
The selected concentrate of n times is hematite concentrate；The wherein condition of roughing flotation are as follows: slurry pH 5 ~ 7, sodium soap dosage 300 ~ 500
G/t, 200 ~ 300 g/t of amount of sodium silicate, 150 g/t of calgon dosage, 40 g/t of foaming agent, flotation time are 3 ~ 5
min；Condition is scanned in flotation are as follows: slurry pH 5 ~ 7,2 min of flotation time, medicament sodium soap, sodium metasilicate, calgon,
The dosage of foaming agent is the half of roughing flotation Chinese medicine dosage；The selected condition of flotation: slurry pH 5,100 g/ of sodium metasilicate
T, 3 min of flotation time；
Table concentration is that a shaking table roughing obtains shaking table rougher concentration and rougher tailings in the step (5), rougher concentration into
Row shaker re-election obtains shaker re-election concentrate and selects tailing again, and rougher tailings carries out shaking table final election and obtains shaking table final election concentrate and float
Tailing is selected, shaker re-election concentrate and final election concentrate merge to obtain table concentration concentrate, and shaker re-election tailing and final election tailing merge
Shaking table tailing is obtained, if the grade of iron is not less than 50% in table concentration concentrate, table concentration concentrate is hematite concentrate；If shaking
The grade of iron is lower than 50% in the selected concentrate of bed, then increases n times shaker re-election and the final election of n times shaking table to n-th table concentration concentrate
The grade of middle iron is not less than 50%, then n-th table concentration concentrate is hematite concentrate.
The beneficial effects of the present invention are:
(1) for pulsating high gradient magnetic separation in conjunction with centrifugation high-gradient magnetic separation technique, the throwing tail of a large amount of gangue minerals is laggard in the present invention
Row centrifugation high-gradient magnetic separation sorts efficient, high-precision sorting, it can be achieved that bloodstone, greatly reduces subsequent selected processing mine
Amount, effectively reduces sorting cost；
(2) in the present invention pulsating high gradient magnetic separation be centrifuged in conjunction with high-gradient magnetic separation technique, common magnetic separation, flotation and again can be sorted
Choosing is difficult to the magnetic magnetic iron ore poor compared with strong, floatability removed, reduces concentrate sulfur content；
(3) for sulfur content is higher and sulphur mainly in the form of magnetic iron ore existing for bloodstone raw ore or rough concentrate, side of the present invention
Method can effectively realize the removal of harmful element sulphur in bloodstone, obtain the hematite concentrate that Iron grade is not less than 50%；
(4) the method for the present invention both can effectively realize removal of sulphur, also can guarantee iron recovery.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the process flow chart of embodiment 1；
Fig. 3 is the process flow chart of comparative example 1；
Fig. 4 is the process flow chart of embodiment 2；
Fig. 5 is the process flow chart of comparative example 2；
Fig. 6 is the process flow chart of embodiment 3；
Fig. 7 is the process flow chart of comparative example 3.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1: the high-sulfur low grade hematite of the present embodiment, Fe grade 19.52%, iron are mainly deposited in the form of bloodstone
, in bloodstone iron distributive law be 78.27%；Hazardous elements S content 1.96% in the ore severely exceeds, and S is mainly with pyrite
Form preservation, partially with magnetic iron ore preservation；Gangue mineral is mainly quartz, dolomite and calcite etc..According to traditional work
Skill process is sorted, and is difficult to drop to S into Eligibility requirements, and be affected to iron recovery during sulphur removal;
As illustrated in fig. 1 and 2, a kind of high-sulfur bloodstone selects iron sulphur removal enrichment method, the specific steps are as follows:
(1) high-sulfur bloodstone raw ore be crushed, sieved, ore grinding, be classified to -0.074mm and account for 76% and obtain the red iron of fine fraction
Mine；
(2) the fine fraction bloodstone of step (1) is subjected to pulsating high gradient magnetic separation roughing and obtains bloodstone rough concentrate I and pulsation magnetic
Select tailing；Wherein pulsating high gradient magnetic separation condition are as follows: 0.8 T of magnetic field strength, 3 mm magnetic mediums, 180 r/min of jig frequency of pulsing, arteries and veins
6 mm of dynamic stroke；Pulsating high gradient magnetic separation roughing can abandon a large amount of gangue minerals；
(3) bloodstone rough concentrate I is subjected to centrifugation high-gradient magnetic separation and obtains centrifugation High-gradient Magnetic concentrate selection and centrifugation cleaner tailings；
Wherein it is centrifuged high-gradient magnetic separation condition: 0.5 T of magnetic field strength, 3 mm magnetic mediums, 4 g of centrifugal intensity；It is centrifuged high-gradient magnetic separation essence
The Iron grade of mine is 41.53%, and being centrifuged granularity -0.074mm in High-gradient Magnetic concentrate selection is 69.25%；
(4) centrifugation High-gradient Magnetic concentrate selection is subjected to table concentration and obtains hematite concentrate and table concentration tailing, table concentration
Tailing, step (4) centrifugation cleaner tailings merge to obtain tailing with the pulsating magnetic selection tailing of step (2)；
Table concentration is that a shaking table roughing obtains shaking table rougher concentration and rougher tailings, and rougher concentration carries out shaker re-election and obtains
Shaker re-election concentrate and tailing is selected again, rougher tailings carries out shaking table final election and obtains shaking table final election concentrate and flotation tailing, and shaking table is again
Concentrate selection and final election concentrate merge to obtain table concentration concentrate, and shaker re-election tailing and final election tailing merge to obtain shaking table tailing；It shakes
The grade of iron is 55.72% in the selected concentrate of bed, and table concentration concentrate is hematite concentrate；
The yield of the present embodiment hematite concentrate is 27.88%, and the Fe grade of hematite concentrate is 55.72%, hematite concentrate iron
The rate of recovery is 79.57%, and hazardous elements S content is reduced to 0.13%(to be shown in Table 1).
Comparative example 1: the mineral research object of this comparative example is same as Example 1；As shown in figure 3, being directed to the sample ore, use
Traditional sorting process is sorted, the specific steps are as follows:
(1) raw ore be crushed, sieved, ore grinding, be classified to -0.074 mm and account for 76%, obtaining fine fraction bloodstone sample ore；
(2) bloodstone after classification is subjected to pulsating high gradient magnetic separation roughing, abandoning a large amount of gangue minerals, to obtain bloodstone coarse-fine
Mine；Pulsating high gradient roughing condition are as follows: 0.8 T of magnetic field strength, 3 mm magnetic mediums, 180 r/min of jig frequency of pulsing, pulsion stroke 6
mm；
(3) bloodstone rough concentrate carries out to pulsating high gradient magnetic separation is selected obtains the selected concentrate of pulsating high gradient and pulsating high gradient
Cleaner tailings；The selected condition of high gradient: 0.6 T of magnetic field strength, 3 mm magnetic mediums, 180 r/min of jig frequency of pulsing, pulsion stroke 6
mm；The Iron grade of the selected concentrate of pulsating high gradient is 32.45%, and granularity -0.074mm is in the selected concentrate of pulsating high gradient
71.51%；
(4) the selected concentrate of pulsating high gradient magnetic separation is obtained into hematite concentrate and shaking table weight using the progress of table concentration technique is selected
Select tailing；Table concentration process are as follows: a shaking table roughing obtains shaking table rougher concentration and rougher tailings, and shaking table rougher concentration carries out
Shaker re-election obtains shaker re-election concentrate and selects tailing again, and rougher tailings carries out shaking table final election and obtains shaking table final election concentrate and final election tail
Shaker re-election concentrate and final election concentrate are merged to obtain table concentration concentrate by mine, and shaker re-election tailing and final election tailing merge to shake
Tailstock mine；The grade of iron is 52.34% in table concentration concentrate, and table concentration concentrate is hematite concentrate；
The yield of the hematite concentrate of this comparative example is 23.06%, and the Fe grade of hematite concentrate is 52.34%, hematite concentrate
Iron recovery is 61.84%, and hazardous elements S content is reduced to 0.79%(to be shown in Table 1)；
Table 1
As it can be seen from table 1 Fe grade is improved 3.48% by embodiment 1, iron recycling compared with traditional handicraft (comparative example 1)
Rate improves 17.73%, and S content is reduced to 0.13%, reduces 0.66%, and thus the method for embodiment 1 is better than traditional sorting side
Method.
Embodiment 2: the present embodiment high-sulfur bloodstone rough concentrate is obtained by the pulsating high gradient magnetic separation of production scene；The red iron of high-sulfur
Fe grade 41.85% in mine rough concentrate, hazardous elements S content 0.57%, S mainly exist in the form of pyrite and magnetic iron ore；Arteries and veins
Stone ore object is mainly quartz；
As shown in figs. 1 and 4, a kind of high-sulfur bloodstone selects iron sulphur removal enrichment method, the specific steps are as follows:
(1) rough concentrate of high-sulfur bloodstone be crushed, sieved, ore grinding, be classified to -0.074mm and account for 80% to obtain fine fraction red
Iron ore rough concentrate II；
(2) by the fine fraction bloodstone rough concentrate II of step (1) carry out centrifugation high-gradient magnetic separation it is selected obtain centrifugation High-gradient Magnetic
Concentrate selection and centrifugation cleaner tailings；Wherein it is centrifuged high-gradient magnetic separation condition: 0.6 T of magnetic field strength, 3 mm magnetic mediums, centrifugal intensity
6 g；The Iron grade for being centrifuged High-gradient Magnetic concentrate selection is 52.68%；Being centrifuged High-gradient Magnetic concentrate selection is hematite concentrate；
The yield of the present embodiment hematite concentrate is 68.77%, and the Fe grade of hematite concentrate is 52.34%, hematite concentrate iron
The rate of recovery is 86.57%, and hazardous elements S content is reduced to 0.085%(to be shown in Table 2).
Comparative example 2: the mineral research object of this comparative example is same as Example 2；As shown in figure 5, this comparative example is using biography
The pulsating high gradient magnetic separation of system-floatation process technology is sorted, the specific steps are as follows:
(1) rough concentrate of high-sulfur bloodstone be crushed, sieved, ore grinding, be classified to -0.074mm and account for 80% to obtain fine fraction red
Iron ore rough concentrate sample ore；
(2) the fine fraction bloodstone rough concentrate sample ore of step (1) is subjected to pulsating high gradient magnetic separation sorting, obtains pulsating high gradient
Magnetic concentrate；Pulsating high gradient magnetic separation condition are as follows: 0.9 T of magnetic field strength, 3 mm magnetic mediums, 200 r/min of jig frequency of pulsing, pulsation
6 mm of stroke；
(3) pulsating high gradient magnetic separation concentrate progress pulsating high gradient magnetic separation is selected, further increase concentrate Iron grade；Pulsation is high
The selected condition of gradient magnetic separation: 0.7 T of magnetic field strength, 3 mm magnetic mediums, pulse 200 r/min of jig frequency, 6 mm of pulsion stroke；
(4) the selected concentrate of pulsating high gradient magnetic separation is subjected to sulphur removal operation using a flotation process, is contained with reducing concentrate S
Amount；Flotation conditions are as follows: add H2SO4PH to 6.5 is adjusted, 80 g/t of ethyl xanthogenate is added, adds No. two 40 g/t of oil, 3 min of flotation；
The yield of the hematite concentrate of this comparative example is 59.19%, and the Fe grade of hematite concentrate is 51.96%, hematite concentrate
Iron recovery is 73.49%, and hazardous elements S content is reduced to 0.21%(to be shown in Table 2)；
Table 2
From table 2 it can be seen that Fe grade is improved 0.72% by embodiment 2, iron recycling compared with traditional handicraft (comparative example 2)
Rate improves 13.08%, and S content is reduced to 0.085%, reduces 0.125%；It, can be same using the method for the present embodiment
Operation completes sulphur removal and proposes iron enrichment purpose, and thus the method for embodiment 2 is better than conventional sorting methods.
Embodiment 3: the present embodiment particulate high-sulfur high-grade bloodstone, Fe grade 31.86%, iron is mainly in the form of bloodstone
In the presence of iron distributive law is 75.34% in bloodstone；Hazardous elements S content 1.12% in the ore, content is exceeded, and sulphur is mainly with Huang
Iron ore and magnetic iron ore form preservation；Gangue mineral is fairly simple, predominantly quartz and dolomite；
As shown in figs. 1 and 6, a kind of high-sulfur bloodstone selects iron sulphur removal enrichment method, the specific steps are as follows:
(1) high-sulfur bloodstone raw ore be crushed, sieved, ore grinding, be classified to -0.074mm and account for 85% and obtain the red iron of fine fraction
Mine；
(2) the fine fraction bloodstone of step (1) is subjected to pulsating high gradient magnetic separation roughing and obtains bloodstone rough concentrate I and pulsation magnetic
Select tailing；Wherein pulsating high gradient magnetic separation condition are as follows: 1.0 T of magnetic field strength, 3 mm magnetic mediums, 180 r/min of jig frequency of pulsing, arteries and veins
6 mm of dynamic stroke；Pulsating high gradient magnetic separation roughing can abandon a large amount of gangue minerals；
(3) bloodstone rough concentrate I is subjected to centrifugation high-gradient magnetic separation and obtains centrifugation High-gradient Magnetic concentrate selection and centrifugation cleaner tailings；
Wherein it is centrifuged high-gradient magnetic separation condition: 0.7 T of magnetic field strength, 3 mm magnetic mediums, 5 g of centrifugal intensity；It is centrifuged high-gradient magnetic separation essence
The Iron grade of mine is 45.86%, and being centrifuged granularity -0.074mm in High-gradient Magnetic concentrate selection is 81.37%；
(4) step (3) centrifugation High-gradient Magnetic concentrate selection carries out to flotation is selected obtains hematite concentrate and flotation tailing, flotation tail
Mine, step (4) centrifugation cleaner tailings merge to obtain tailing with the pulsating magnetic selection tailing of step (2)；The wherein selected use of flotation
" one slightly sweeps an essence " floatation process carries out selected: one time roughing flotation obtains flotation rough concentrate and rougher tailings, rougher tailings
Flotation is carried out to scan scavenger concentrate chats and to scan tailing, flotation rough concentrate carry out flotation it is selected selected concentrate and selected tail
Mine, scavenger concentrate and cleaner tailings, which merge, returns to roughing flotation process；The grade of iron is 57.68% in selected concentrate, selected concentrate
As hematite concentrate；Roughing flotation condition are as follows: sulfuric acid tune pH to 7, sodium soap 500g/t, 300 g/t of sodium metasilicate, six inclined phosphorus
Sour 150 g/t of sodium, No. two 40 g/t of oil, 5 min of flotation time；Condition is scanned in flotation are as follows: sulfuric acid tune pH to 8, sodium soap
250g/t, 150 g/t of sodium metasilicate, calgon 75 g/t, No. two 20 g/t of oil, 2 min of flotation time；The selected item of flotation
Part: sulfuric acid tune pH to 5,100 g/t of sodium metasilicate, 3 min of flotation time；
The yield of the hematite concentrate of the present embodiment is 45.09%, and the Fe grade of hematite concentrate is 57.68%, hematite concentrate
Iron recovery is 81.64%, and hazardous elements S content is reduced to 0.12%(to be shown in Table 3).
Comparative example 3: the mineral research object of this comparative example is same as Example 3；
As shown in fig. 7, this comparative example is sorted using traditional pulsating high gradient magnetic separation-floatation process, the specific steps are as follows:
(1) raw ore be crushed, sieved, ore grinding, be classified to -0.074 mm and account for 85%, obtaining fine fraction bloodstone sample ore；
(2) bloodstone after classification is subjected to pulsating high gradient magnetic separation roughing, abandons a large amount of gangue minerals and to obtain bloodstone thick
Concentrate；Pulsating high gradient magnetic separation condition are as follows: 1.0 T of magnetic field strength, 3 mm magnetic mediums, 180 r/min of jig frequency of pulsing, pulsion stroke
6 mm；
(3) further selected through pulsating high gradient by bloodstone mine rough concentrate, obtain the selected essence of the higher pulsating high gradient of grade
Mine；The selected condition of pulsating high gradient magnetic separation are as follows: 0.7 T of magnetic field strength, 3 mm magnetic mediums, 180 r/min of jig frequency of pulsing, pulsation punching
6 mm of journey；
(4) the selected concentrate of pulsating high gradient magnetic separation is selected using " one slightly sweeps two essences " floatation process progress, obtain Iron grade
Hematite flotation concentrate up to standard: roughing flotation obtains flotation rough concentrate and rougher tailings, and rougher tailings carries out flotation and scans
Scavenger concentrate and scan tailing, flotation rough concentrate carries out the selected Iron grade hematite concentrate up to standard and selected of obtaining of secondary flotation
Tailing, scavenger concentrate and cleaner tailings are successively back to previous flotation operation process；Roughing flotation condition are as follows: sulfuric acid tune pH is extremely
8, sodium soap 300g/t, 200 g/t of sodium metasilicate, calgon 150 g/t, No. two 40 g/t of oil, 5 min of flotation time；
Condition is scanned in flotation are as follows: sulfuric acid tune pH to 8, sodium soap 150g/t, 100 g/t of sodium metasilicate, calgon 75 g/t, and No. two
Oil 20 g/t, 2 min of flotation time；The selected condition of flotation: sulfuric acid tune pH to 5,100 g/t of sodium metasilicate, 3 min of flotation time；
(5) flotation concentrate is subjected to desulfuration operations using floatation process, obtains hematite concentrate；Flotation conditions are as follows: add H2SO4It adjusts
PH to 6.5 adds 80 g/t of ethyl xanthogenate, adds No. two 40 g/t of oil, 3 min of flotation；
The yield of the hematite concentrate of this comparative example is 41.26%, and the Fe grade of hematite concentrate is 54.72%, hematite concentrate
Iron recovery is 70.86%, and hazardous elements S content is reduced to 0.23%(to be shown in Table 3)；
Table 3
From table 3 it can be seen that Fe grade is improved 0.72% by embodiment 3, iron recycling compared with traditional handicraft (comparative example 3)
Rate improves 13.08%, and S content is reduced to 0.085%, reduces 0.125%, and thus the method for embodiment 3 is better than tradition sorting
Method.
In conjunction with attached drawing, the embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (6)
1. a kind of high-sulfur bloodstone selects iron sulphur removal enrichment method, which is characterized in that specific step is as follows:
(1) high-sulfur bloodstone raw ore be crushed, sieved, ore grinding, be classified to -0.074mm and account for 75 ~ 85% to obtain fine fraction red
Iron ore；
(2) the fine fraction bloodstone of step (1) is subjected to pulsating high gradient magnetic separation roughing and obtains bloodstone rough concentrate I and pulsation magnetic
Select tailing；
(3) rough concentrate of high-sulfur bloodstone be crushed, sieved, ore grinding, be classified to -0.074mm and account for 75 ~ 85% and obtain particulate
Grade bloodstone rough concentrate II；
(4) the fine fraction bloodstone rough concentrate II of the bloodstone rough concentrate I of step (2) and/or step (3) is carried out being centrifuged high ladder
Degree magnetic separation obtains centrifugation High-gradient Magnetic concentrate selection and is centrifuged cleaner tailings；
(5) if the Iron grade of the centrifugation High-gradient Magnetic concentrate selection of step (4) is not less than 50%, it is centrifuged High-gradient Magnetic concentrate selection i.e.
Centrifugation magnetic tailing for hematite concentrate, step (4) merges to obtain tailing with the pulsating magnetic selection tailing of step (2)；If step
(4) granularity -0.074mm is not low lower than 50% and in centrifugation High-gradient Magnetic concentrate selection for the Iron grade of centrifugation High-gradient Magnetic concentrate selection
In 80%, then carry out that flotation is selected to obtain hematite concentrate and flotation tailing, flotation tailing, step (4) centrifugation cleaner tailings with
The pulsating magnetic selection tailing of step (2) merges to obtain tailing；If the Iron grade of the centrifugation High-gradient Magnetic concentrate selection of step (4) is lower than
50% and centrifugation High-gradient Magnetic concentrate selection in granularity -0.074mm be lower than 80%, then carry out table concentration and obtain hematite concentrate and shaking
Bed gravity tailings, table concentration tailing, step (4) centrifugation cleaner tailings merge to obtain with the pulsating magnetic selection tailing of step (2)
Tailing.
2. high-sulfur bloodstone selects iron sulphur removal enrichment method according to claim 1, it is characterised in that: in high-sulfur bloodstone
Sulphur mainly exists in the form of pyrite and/or magnetic iron ore.
3. high-sulfur bloodstone selects iron sulphur removal enrichment method according to claim 1, it is characterised in that: pulsation in step (2)
Magnetic field strength is 0.8 ~ 1.0T in high gradient roughing.
4. high-sulfur bloodstone selects iron sulphur removal enrichment method according to claim 1, it is characterised in that: centrifugation high-gradient magnetic separation
Middle magnetic field strength is 0.5 ~ 0.7 T, and centrifugal intensity is 4 ~ 6g.
5. high-sulfur bloodstone selects iron sulphur removal enrichment method according to claim 1, it is characterised in that: flotation in step (5)
Selected is that a roughing flotation obtains flotation rough concentrate and rougher tailings, and rougher tailings carries out flotation and scans to obtain scavenger concentrate chats
With scan tailing, it is selected that selected concentrate and cleaner tailings, scavenger concentrate and cleaner tailings merge that flotation rough concentrate carries out flotation
Return to roughing flotation process；If the grade of iron is not less than 50% in the selected obtained selected concentrate of a flotation, selected concentrate is
Hematite concentrate；If the grade of iron is lower than 50% in the selected obtained selected concentrate of a flotation, it is selected extremely to increase n times flotation
The grade of iron is not less than 50% in the selected obtained selected concentrate of n times of n-th flotation, then the selected concentrate of n-th is bloodstone essence
Mine；The wherein condition of roughing flotation are as follows: slurry pH 5 ~ 7,300 ~ 500 g/t of sodium soap dosage, amount of sodium silicate 200 ~ 300
G/t, 150 g/t of calgon dosage, 40 g/t of foaming agent, flotation time are 3 ~ 5 min；Condition is scanned in flotation are as follows: ore pulp
PH value 5 ~ 7,2 min of flotation time, medicament sodium soap, sodium metasilicate, calgon, foaming agent dosage be roughing flotation
The half of Chinese medicine dosage；The selected condition of flotation: slurry pH 5,100 g/t of sodium metasilicate, 3 min of flotation time.
6. high-sulfur bloodstone selects iron sulphur removal enrichment method according to claim 1, it is characterised in that: gravity treatment in step (5)
Shaking table rougher concentration and rougher tailings are obtained for a shaking table roughing, rougher concentration carries out shaker re-election and obtains shaker re-election concentrate
Tailing is selected again, and rougher tailings carries out shaking table final election and obtains shaking table final election concentrate and flotation tailing, shaker re-election concentrate and final election
Concentrate merges to obtain table concentration concentrate, and shaker re-election tailing and final election tailing merge to obtain shaking table tailing, if table concentration concentrate
The grade of middle iron is not less than 50%, then table concentration concentrate is hematite concentrate；If the grade of iron is lower than in table concentration concentrate
50%, then increase the grade of n times shaker re-election and the final election of n times the shaking table iron into n-th table concentration concentrate not less than 50%, then the
N times table concentration concentrate is hematite concentrate.
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| CN111644261A (en) * | 2020-06-10 | 2020-09-11 | 云南九州再生资源开发有限公司 | Red mud iron separation method |
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