CN108097452B - The ore-dressing technique of fine quality iron concentrate is produced from iron ore - Google Patents
The ore-dressing technique of fine quality iron concentrate is produced from iron ore Download PDFInfo
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- CN108097452B CN108097452B CN201810147519.0A CN201810147519A CN108097452B CN 108097452 B CN108097452 B CN 108097452B CN 201810147519 A CN201810147519 A CN 201810147519A CN 108097452 B CN108097452 B CN 108097452B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 320
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 160
- 239000012141 concentrate Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007885 magnetic separation Methods 0.000 claims abstract description 48
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000005188 flotation Methods 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 15
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 12
- 239000012190 activator Substances 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims description 65
- 239000004576 sand Substances 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 26
- 239000006260 foam Substances 0.000 claims description 20
- RZFBEFUNINJXRQ-UHFFFAOYSA-M sodium ethyl xanthate Chemical compound [Na+].CCOC([S-])=S RZFBEFUNINJXRQ-UHFFFAOYSA-M 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 16
- 239000005864 Sulphur Substances 0.000 claims description 15
- ZKDDJTYSFCWVGS-UHFFFAOYSA-M sodium;diethoxy-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Na+].CCOP([S-])(=S)OCC ZKDDJTYSFCWVGS-UHFFFAOYSA-M 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 19
- 239000011593 sulfur Substances 0.000 abstract description 19
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 10
- 239000011707 mineral Substances 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 229910001608 iron mineral Inorganic materials 0.000 abstract description 5
- 239000000178 monomer Substances 0.000 abstract description 5
- 238000010494 dissociation reaction Methods 0.000 abstract description 4
- 230000005593 dissociations Effects 0.000 abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract description 3
- 229910000162 sodium phosphate Inorganic materials 0.000 abstract description 3
- 239000001488 sodium phosphate Substances 0.000 abstract description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 2
- 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 description 4
- 238000007689 inspection Methods 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 239000011028 pyrite Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- -1 amyl xanthan Chemical compound 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000008177 pharmaceutical agent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
-
- 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
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of from iron ore produces the ore-dressing technique of fine quality iron concentrate, belongs to mineral engineering field.Contain more magnetic iron ore in Mongolian iron ore, is entered in iron ore concentrate in magnetic separation, cause sulfur content in iron ore concentrate higher, limit the utilization of iron ore concentrate.The present invention selects iron-flotation magnetic iron ore technique using ore grinding-magnetic separation, makes most of iron mineral monomer dissociation first, improve magnetic iron ore particle surface by degree of oxidation；Using the mixture of efficient and rational aluminum sulfate or aluminum sulfate and sodium phosphate, ammonium fluosilicate activates magnetic iron ore mineral surfaces for the activator of magnetic iron ore, pH regulator, and controls the state-of-charge of the mineral surfaces in ore pulp well；Magnetic iron ore that can be different to degree of oxidation using the combined capturing and collecting agent with preferably selectivity and collecting performance while collecting, greatly reduce the sulfur content in iron ore concentrate, obtain fine quality iron concentrate, efficiently separate magnetic iron ore and magnetic iron ore.
Description
Technical field
The invention belongs to mineral engineering fields, and in particular to a kind of ore dressing that fine quality iron concentrate is produced from iron ore
Technique.
Background technique
Mongolian iron ore is largely magnetite ore, and all iron content is higher, belongs to rich iron ore, but due to the content of sulphur
It is higher to limit its utilization.Containing sulfur minerals in Mongolian iron ore are generally magnetic iron ore, since magnetic iron ore has magnetism,
In iron ore magnetic separation as magnetic iron ore enters in iron ore concentrate, cause the sulphur in iron ore concentrate 2.0% or more, it is sometimes even high
Up to 3% or more, the quality of iron ore concentrate is caused and is seriously affected.Containing sulfur minerals present in iron ore concentrate are not only during the sintering process
Atmosphere is polluted, and in order to guarantee that desulfurization effect must be added to more lime, increased so as to cause the quantity of slag, coke ratio raising, separately
Sulphur in outer steel can be also easy to produce " hot-short " in steel hot-working.Magnetic iron ore, which has, is easier oxidation than other sulfide
Feature, the easy argillization in ore grinding, therefore, magnetic iron ore is in floatation process, due to the oxidation of magnetic iron ore, argillization, and oxygen
Change degree is deep mixed, belongs to the mineral of more difficult removing.Ore dressing worker has carried out many researchs to removing magnetic iron ore thus
Work, the method for removing magnetic iron ore is generally floatation, at present to the research of flotation activating, inhibitor and collecting agent compared with
More but bad to the deeper magnetic iron ore separating effect of degree of oxidation, the sulfur-bearing especially often changed to ore properties is higher
Outsourcing Mongolia iron ore be difficult for the sulphur in iron ore concentrate to be down to 0.4% hereinafter, and iron ore concentrate loss it is more, the rate of recovery is insufficient
80%.
Summary of the invention
The object of the present invention is to provide a kind of from iron ore produces the ore-dressing technique of fine quality iron concentrate, which keeps iron smart
Sulphur in mine be down to 0.4% hereinafter, and guarantee the rate of recovery of iron ore concentrate 87% or more, the sulphur for not only reducing iron ore concentrate contains
Amount, eliminates influence of the sulphur to subsequent job, and reduce the loss of iron ore concentrate, reduces pollution of the sulphur to atmosphere.
The purpose of the present invention is realized as follows.
1, three sections of ore grindings of raw material；
Mongolian iron ore is subjected to primary grinding first, primary grinding product enters grader and carries out scalping operation,
Obtain scalping sand setting product and scalping overflow product；Scalping sand setting product carries out secondary grinding and obtains two sections of mills
Mineral products, secondary grinding product return to scalping and carry out Inspection graduation；Scalping overflow product enter hydrocyclone into
Row secondary grading operation obtains secondary grading sand setting product and secondary grading overflow product；Secondary grading sand setting product carries out three
Section ore grinding obtains three sections of ore milling products, and three sections of ore milling products enter hydrocyclone and carry out graded operation three times, divided three times
Grade sand setting product and three times Grading Overflow product；Classification sand setting product continues ore grinding back to three sections of grinding machines three times；By two
Secondary Grading Overflow product and three times Grading Overflow product mix, -200 mesh of granularity account for 70-77%, the raw material as magnetic separation.
2, iron is selected in magnetic separation；
By the secondary grading overflow product of above-mentioned steps acquisition and three times after Grading Overflow product mix as a magnetic separation
Raw material, carry out magnetic separation under the conditions of magnetic field strength 135-159kA/m, obtain a stages of magnetic separation rough concentrate, and throw and remove part tailing；
One stages of magnetic separation rough concentrate is subjected to secondary magnetic separation under the conditions of magnetic field strength 119-135kA/m, obtains two stages of magnetic separation concentrate in
Mine is carried out ore grinding back to three sections of grinding machines, is kept iron mineral monomer dissociation subsequent due to the most of non-monomer dissociation of chats iron mineral
Continuous progress magnetic separation sorts.Mongolian iron ore uses the ore-dressing technique of three sections of-two stages of magnetic separation of ore grinding, can be from containing full iron 52-57%%
Iron ore in, obtain full iron greater than 66%, the rate of recovery be greater than 94% iron ore concentrate.
3, floatation desulphurization；
Using the iron ore concentrate that above-mentioned steps obtain as the raw material of flotation magnetic iron ore, with aluminum sulfate or mass ratio 3-1:1-2
The pH of the mixture or mass ratio 1-2:3-2 aluminum sulfate of aluminum sulfate and ammonium fluosilicate and the mixture of sodium phosphate as magnetic iron ore
Regulator and activator, the collecting agent of amylic sodium xanthogenate, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, using matter
The collecting agent than 3-2:2-1:1-0.5 amylic sodium xanthogenate, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore is measured, in pH
Regulator and activator level be 1.5-3.5kg/t, collector dosage 0.2-0.8kg/t, natural slurry temperature, pH value 4.5-
Under conditions of 5.5, one roughing is carried out after stirring 3-8min, obtains roughing iron ore concentrate and roughing foam；With roughing iron ore concentrate work
Raw material is scanned for flotation, using mass ratio 3-2:2-1:1-0.5 amylic sodium xanthogenate, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic
The collecting agent of pyrite, collector dosage 0.05-0.15kg/t stir 1-3min under the conditions of natural slurry temperature, then exist
It is scanned under natural ph, obtains sulfur grade 0.1-0.4%, full Iron grade is greater than the excellent of 67%, operation recovery 90-94%
Matter iron ore concentrate and scan foam.
4, iron-flotation magnetic iron ore sorting process is selected using ore grinding-magnetic separation, 2%% Mongolian iron ore can be greater than from sulfur-bearing
Shi Zhong obtains sulfur grade 0.1-0.3%, full Iron grade is greater than the fine quality iron concentrate of 67%, rate of recovery 87-92%；
5, it by roughing foam that above-mentioned steps obtain and scans foam and is incorporated as further selecting the raw material of sulphur.
Compared with prior art, the technology of the present invention effect includes:
This technology uses three sections of ore grindings-two-stages magnetic separation recycling iron mineral first, not only realizes most of iron mineral
Monomer dissociation, improve magnetic iron ore particle surface by degree of oxidation, and every section of ore grinding is all made of classifying equipoment control
Good grinding fineness, this not only lowers ore grinding energy consumptions, save ore grinding cost, and will not be again magnetic because of overground generation argillization
Pyrite monomer flotation creates condition；Using efficient activator and pH regulator, make magnetic iron ore mineral surfaces well
It is activated, and controls the state-of-charge of the mineral surfaces in ore pulp well；Using with preferable selectivity and collecting performance
Combined capturing and collecting agent, the collecting simultaneously of magnetic iron ore that can be different to degree of oxidation greatly reduces the sulfur content in iron ore concentrate,
Fine quality iron concentrate is obtained, efficiently separating for magnetic iron ore and magnetic iron ore is realized.
The present invention is adopted using a kind of ore-dressing technique for producing I class of C67 or II class fine quality iron concentrate from Mongolian iron ore
Iron-flotation magnetic iron ore technique is selected with ore grinding-magnetic separation, efficient pharmaceutical agent combinations is equipped with and removes magnetic iron ore from iron ore concentrate,
Make the sulphur in iron ore concentrate be down to 0.4% hereinafter, and guarantee iron ore concentrate the rate of recovery 87% or more, not only reduce iron ore concentrate
Sulfur content, eliminate influence of the sulphur to subsequent job, and reduce the loss of iron ore concentrate, and produce I class of C67 or II class
Fine quality iron concentrate.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is the flow chart for producing the ore-dressing technique of fine quality iron concentrate in the present invention from iron ore.
Specific embodiment
It is described below and specific embodiments of the present invention is fully shown, to enable those skilled in the art to practice it
?.
Embodiment 1
A kind of ore-dressing technique producing fine quality iron concentrate from Mongolian iron ore, mainly includes following components:
1, Mongolian iron ore is carried out first primary grinding (3.2 × 4.5m of grinding machine model Φ), primary grinding product enters
Grader carries out scalping operation, obtains scalping sand setting product and scalping overflow product；
2, secondary grinding (3.6 × 4.0m of grinding machine model Φ) is carried out with the scalping sand setting product that above-mentioned steps obtain,
Secondary grinding product returns to scalping and carries out Inspection graduation；Scalping overflow product enters cyclone and carries out secondary grading work
Industry obtains secondary grading sand setting product and secondary grading overflow product；
3, three sections of ore grindings (3.6 × 6.0m of grinding machine model Φ) are carried out with the secondary grading sand setting product that above-mentioned steps obtain,
Three sections of ore milling products enter cyclone and carry out graded operation three times, are classified sand setting product three times and Grading Overflow produces three times
Product；Classification sand setting product continues ore grinding back to three sections of grinding machines three times；It is classified secondary grading overflow product and three times and overflows
Product mix is flowed, -200 mesh of granularity accounts for 72.8%, the raw material as magnetic separation；
4, a magnetic is used as after Grading Overflow product mix by the secondary grading overflow product of above-mentioned steps acquisition and three times
The raw material of choosing carries out magnetic separation under the conditions of magnetic field strength 143kA/m, obtains a stages of magnetic separation rough concentrate, and throw and remove part tailing；It will
One stages of magnetic separation rough concentrate carries out secondary magnetic separation under the conditions of magnetic field strength 127kA/m, obtains two stages of magnetic separation concentrate and chats, chats
Ore grinding is carried out back to three sections of grinding machines.Mongolian iron ore is sorted by three sections of-two stages of magnetic separation ore-dressing techniques of ore grinding, can be from containing Quan Tie
In 53.20%% iron ore, the iron ore concentrate of full Iron grade 67.00%, the rate of recovery 96.85% is obtained；
5, using the iron ore concentrate that above-mentioned steps obtain as the raw material of flotation magnetic iron ore, using aluminum sulfate as magnetic iron ore
PH regulator and activator, using mass ratio 2:1.5:0.5 amylic sodium xanthogenate, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic
The collecting agent of pyrite, addition of aluminum sulfate be 2.5kg/t, collector dosage 0.50kg/t, natural slurry temperature, pH value 5
Under the conditions of, one roughing is carried out after stirring 6min, obtains roughing iron ore concentrate and roughing foam；
6, raw material is scanned as flotation using the roughing iron ore concentrate that above-mentioned steps obtain, it is yellow with mass ratio 2:1.5:0.5 amyl
The collecting agent of ortho acid sodium, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, collector dosage 0.1kg/t, in natural mine
3min is stirred under the conditions of slurry temperature degree, is then scanned under natural ph, and sulfur grade 0.19%, full Iron grade are obtained
68.10%, the fine quality iron concentrate of operation recovery 91.21% and foam is scanned；
7, iron-flotation magnetic iron ore sorting process is selected using three sections of ore grinding-magnetic separation, it can be from the Mongolian iron of sulfur-bearing 2.30%%
In ore, the fine quality iron concentrate of sulfur grade 0.19%, full Iron grade 68.10%, the rate of recovery 88.33% is obtained；
8, it by roughing foam that above-mentioned steps obtain and scans foam and is incorporated as further selecting the raw material of sulphur.
Embodiment 2
A kind of ore-dressing technique producing fine quality iron concentrate from Mongolian iron ore, mainly includes following components:
1, Mongolian iron ore is carried out first primary grinding (3.2 × 4.5m of grinding machine model Φ), primary grinding product enters
Grader carries out scalping operation, obtains scalping sand setting product and scalping overflow product；
2, secondary grinding (3.6 × 4.0m of grinding machine model Φ) is carried out with the scalping sand setting product that above-mentioned steps obtain,
Secondary grinding product returns to scalping and carries out Inspection graduation；Scalping overflow product enters cyclone and carries out secondary grading work
Industry obtains secondary grading sand setting product and secondary grading overflow product；
3, three sections of ore grindings (3.6 × 6.0m of grinding machine model Φ) are carried out with the secondary grading sand setting product that above-mentioned steps obtain,
Three sections of ore milling products enter cyclone and carry out graded operation three times, are classified sand setting product three times and Grading Overflow produces three times
Product；Classification sand setting product continues ore grinding back to three sections of grinding machines three times；It is classified secondary grading overflow product and three times and overflows
Product mix is flowed, -200 mesh of granularity accounts for 76.2%, the raw material as magnetic separation；
4, a magnetic is used as after Grading Overflow product mix by the secondary grading overflow product of above-mentioned steps acquisition and three times
The raw material of choosing carries out magnetic separation under the conditions of magnetic field strength 151kA/m, obtains a stages of magnetic separation rough concentrate, and throw and remove part tailing；It will
One stages of magnetic separation rough concentrate carries out secondary magnetic separation under the conditions of magnetic field strength 131kA/m, obtains two stages of magnetic separation concentrate and chats, chats
Ore grinding is carried out back to three sections of grinding machines.Mongolian iron ore is sorted by three sections of-two stages of magnetic separation ore-dressing techniques of ore grinding, can be from containing Quan Tie
In 55.70% iron ore, the iron ore concentrate of full Iron grade 66.60%, the rate of recovery 96.62% is obtained；
5, using the iron ore concentrate that above-mentioned steps obtain as the raw material of flotation magnetic iron ore, with mass ratio 3:1 aluminum sulfate and fluorine
PH regulator and activator of the mixture of ammonium silicate as magnetic iron ore, mass ratio 3:2:0.8 amylic sodium xanthogenate, ethyl are yellow
The collecting agent of ortho acid sodium and fourth Sodium Aerofloat as magnetic iron ore, pH regulator and activator level are 3.0kg/t, collecting agent is used
Under conditions of measuring 0.60kg/t, natural slurry temperature, pH value 4.8, one roughing is carried out after stirring 8min, obtains roughing iron ore concentrate
With roughing foam；
6, raw material is scanned as flotation using the roughing iron ore concentrate that above-mentioned steps obtain, with mass ratio 3:2:0.8 amyl xanthan
The collecting agent of sour sodium, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, collector dosage 0.13kg/t, in natural ore pulp
Stir 3min under the conditions of temperature, then scanned under natural ph, obtain sulfur grade 0.38%, full Iron grade 67.80%,
The fine quality iron concentrate of operation recovery 90.14% and scan foam；
7, iron-flotation magnetic iron ore sorting process is selected using three sections of ore grinding-magnetic separation, it can be from the Mongolian iron of sulfur-bearing 3.01%%
In ore, the fine quality iron concentrate of sulfur grade 0.38%, full Iron grade 67.80%, the rate of recovery 87.10% is obtained；
8, it by roughing foam that above-mentioned steps obtain and scans foam and is incorporated as further selecting the raw material of sulphur.
Embodiment 3
A kind of ore-dressing technique producing fine quality iron concentrate from Mongolian iron ore, mainly includes following components:
1, Mongolian iron ore is carried out first primary grinding (3.2 × 4.5m of grinding machine model Φ), primary grinding product enters
Grader carries out scalping operation, obtains scalping sand setting product and scalping overflow product；
2, secondary grinding (3.6 × 4.0m of grinding machine model Φ) is carried out with the scalping sand setting product that above-mentioned steps obtain,
Secondary grinding product returns to scalping and carries out Inspection graduation；Scalping overflow product enters cyclone and carries out secondary grading work
Industry obtains secondary grading sand setting product and secondary grading overflow product；
3, three sections of ore grindings (3.6 × 6.0m of grinding machine model Φ) are carried out with the secondary grading sand setting product that above-mentioned steps obtain,
Three sections of ore milling products enter cyclone and carry out graded operation three times, are classified sand setting product three times and Grading Overflow produces three times
Product；Classification sand setting product continues ore grinding back to three sections of grinding machines three times；It is classified secondary grading overflow product and three times and overflows
Product mix is flowed, -200 mesh of granularity accounts for 74.6%, the raw material as magnetic separation；
4, a magnetic is used as after Grading Overflow product mix by the secondary grading overflow product of above-mentioned steps acquisition and three times
The raw material of choosing carries out magnetic separation under the conditions of magnetic field strength 147kA/m, obtains a stages of magnetic separation rough concentrate, and throw and remove part tailing；It will
One stages of magnetic separation rough concentrate carries out secondary magnetic separation under the conditions of magnetic field strength 123kA/m, obtains two stages of magnetic separation concentrate and chats, chats
Ore grinding is carried out back to three sections of grinding machines.Mongolian iron ore is sorted by three sections of-two stages of magnetic separation ore-dressing techniques of ore grinding, can be from containing Quan Tie
In 55.60%% iron ore, the iron ore concentrate of full Iron grade 66.80%, the rate of recovery 96.11% is obtained；
5, using above-mentioned steps obtain iron ore concentrate be used as flotation magnetic iron ore raw material, with mass ratio 1:1.2 aluminum sulfate with
PH regulator and activator of the mixture of sodium phosphate as magnetic iron ore, using mass ratio 2:1.5:0.5 amylic sodium xanthogenate,
The collecting agent of sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore is 3.0kg/t, collector dosage in addition of aluminum sulfate
Under conditions of 0.52kg/t, natural slurry temperature, pH value 4.9, carry out one roughing after stirring 5min, obtain roughing iron ore concentrate and
Roughing foam；
6, raw material is scanned as flotation using the roughing iron ore concentrate that above-mentioned steps obtain, it is yellow with mass ratio 2:1.5:0.5 amyl
The collecting agent of ortho acid sodium, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, collector dosage 0.1kg/t, in natural mine
3min is stirred under the conditions of slurry temperature degree, is then scanned under natural ph, and sulfur grade 0.23%, full Iron grade are obtained
67.90%, the fine quality iron concentrate of operation recovery 90.78% and foam is scanned；
7, iron-flotation magnetic iron ore sorting process is selected using three sections of ore grinding-magnetic separation, it can be from the Mongolian iron of sulfur-bearing 2.30%%
In ore, the fine quality iron concentrate of sulfur grade 0.23%, full Iron grade 67.90%, the rate of recovery 87.32% is obtained；
8, it by roughing foam that above-mentioned steps obtain and scans foam and is incorporated as further selecting the raw material of sulphur.
It should be understood that the invention is not limited to the process and structure that are described above and are shown in the accompanying drawings,
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims
System.
Claims (1)
1. a kind of ore-dressing technique for producing fine quality iron concentrate from iron ore, which is characterized in that including following components:
(1) Mongolian iron ore is subjected to primary grinding first, primary grinding product enters grader and carries out scalping operation, obtains
To scalping sand setting product and scalping overflow product；
(2) the scalping sand setting product of acquisition is subjected to secondary grinding, secondary grinding product returns to scalping and checked
Classification；Scalping overflow product enters cyclone and carries out secondary grading operation, obtains secondary grading sand setting product and secondary point
Grade overflow product；
(3) the secondary grading sand setting product of acquisition is subjected to three sections of ore grindings, three sections of ore milling products enter cyclone and divided three times
Grade operation, is classified sand setting product and three times Grading Overflow product three times；Classification sand setting product returns to three sections of grinding machines three times
Continue ore grinding；By secondary grading overflow product and Grading Overflow product mix three times, -200 mesh of granularity accounts for 72.8%, makees
For the raw material of magnetic separation；
(4) by the secondary grading overflow product of acquisition and the raw material after Grading Overflow product mix as a magnetic separation three times,
Magnetic separation is carried out under the conditions of magnetic field strength 143kA/m, obtains a stages of magnetic separation rough concentrate, and throw and remove part tailing；One stages of magnetic separation is thick
Concentrate carries out secondary magnetic separation under the conditions of magnetic field strength 127kA/m, obtains two stages of magnetic separation concentrate and chats, middling recurrence is to three sections
Grinding machine carries out ore grinding, is sorted by three sections of-two stages of magnetic separation ore-dressing techniques of ore grinding, obtains full Iron grade 67.00%, the rate of recovery
96.85% iron ore concentrate；
(5) using the iron ore concentrate of acquisition as the raw material of flotation magnetic iron ore, pH regulator using aluminum sulfate as magnetic iron ore and
Activator, using mass ratio 2:1.5:0.5 amylic sodium xanthogenate, sodium ethylxanthate and fourth Sodium Aerofloat catching as magnetic iron ore
Receive agent, addition of aluminum sulfate be 2.5kg/t, collector dosage 0.50kg/t, natural slurry temperature, pH value 5 under conditions of, stirring
One roughing is carried out after 6min, obtains roughing iron ore concentrate and roughing foam；
(6) the roughing iron ore concentrate of acquisition is scanned into raw material as flotation, with mass ratio 2:1.5:0.5 amylic sodium xanthogenate, ethyl
The collecting agent of sodium xanthogenate and fourth Sodium Aerofloat as magnetic iron ore, collector dosage 0.1kg/t, under the conditions of natural slurry temperature
3min is stirred, is then scanned under natural ph, fine quality iron concentrate is obtained and scans foam；
(7) it by the roughing foam of acquisition and scans foam and is incorporated as further selecting the raw material of sulphur.
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| CN109821651A (en) * | 2019-04-15 | 2019-05-31 | 宝钢集团新疆八一钢铁有限公司 | A kind of CHARACTERISTICS OF TAILINGS SAND ferro element choosing method again |
| CN113667820B (en) * | 2021-07-20 | 2023-05-26 | 包头钢铁（集团）有限责任公司 | Method for comprehensively and efficiently utilizing iron ore of Mongolian country |
| CN114609000B (en) * | 2022-05-11 | 2022-08-02 | 矿冶科技集团有限公司 | Judgment method for reducing magnetic effectiveness of pyrrhotite and application |
| CN115178346A (en) * | 2022-07-18 | 2022-10-14 | 山东黄金矿业科技有限公司选冶实验室分公司 | Ore grinding quality control method for pyrite in gold ore |
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| CN104069937A (en) * | 2014-05-16 | 2014-10-01 | 马钢集团设计研究院有限责任公司 | Ore dressing method for removing pyrrhotite from iron ore |
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