CN108097452A - 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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- CN108097452A CN108097452A CN201810147519.0A CN201810147519A CN108097452A CN 108097452 A CN108097452 A CN 108097452A CN 201810147519 A CN201810147519 A CN 201810147519A CN 108097452 A CN108097452 A CN 108097452A
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- 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
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- 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
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- 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
Abstract
The present invention relates to a kind of ore-dressing techniques that fine quality iron concentrate is produced from iron ore, belong to mineral engineering field.Containing more magnetic iron ore in Mongolian iron ore, entered in magnetic separation in iron ore concentrate, cause sulfur content in iron ore concentrate higher, limit the utilization of iron ore concentrate.The present invention using mill ore magnetic selection selects iron flotation magnetic iron ore technique, makes most of iron mineral monomer dissociation first, improve magnetic iron ore particle surface by degree of oxidation；Efficient and rational aluminum sulfate or aluminum sulfate and the activator of sodium phosphate, the mixture of ammonium fluosilicate for magnetic iron ore, pH regulators are used, magnetic iron ore mineral surfaces is activated, and controls the state-of-charge of the mineral surfaces in ore pulp well；Using the combined capturing and collecting agent with preferable selectivity and collecting performance, magnetic iron ore that can be different to degree of oxidation while collecting greatly reduce the sulfur content in iron ore concentrate, obtain fine quality iron concentrate, efficiently separated 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 technology
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
The higher utilization for limiting it.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 is entered in iron ore concentrate, cause the sulphur in iron ore concentrate more than 2.0%, it is sometimes even high
Up to more than 3%, the quality of iron ore concentrate is caused and is seriously affected.Containing sulfur minerals present in iron ore concentrate are not only in sintering process
Air is polluted, and in order to ensure that desulfurization effect must be added to more lime, is raised so as to cause quantity of slag increase, coke ratio, separately
Sulphur in outer steel can be also easy to produce " hot-short " in steel hot-working.Magnetic iron ore has is easier what is aoxidized 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 therefore
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 is difficult that the sulphur in iron ore concentrate is down to less than 0.4%, and iron ore concentrate loss is more, rate of recovery deficiency
80%.
The content of the invention
The object of the present invention is to provide a kind of ore-dressing technique that fine quality iron concentrate is produced from iron ore, which makes iron smart
Sulphur in ore deposit is down to less than 0.4%, and the rate of recovery for ensureing iron ore concentrate, more than 87%, the sulphur for not only reducing iron ore concentrate contains
Amount, eliminates influence of the sulphur to subsequent job, and reduces the loss of iron ore concentrate, reduces pollution of the sulphur to air.
The purpose of the present invention is realized as follows.
1st, 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.
2nd, iron is selected in magnetic separation；
Using 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 intensity 135-159kA/m, obtain a stages of magnetic separation rough concentrate, and throw except part tailing；
One stages of magnetic separation rough concentrate under the conditions of magnetic field intensity 119-135kA/m is subjected to secondary magnetic separation, obtains two stages of magnetic separation concentrate in
Ore deposit due to the most of non-monomer dissociation of chats iron mineral, carries out ore grinding back to three sections of grinding machines, makes iron mineral monomer dissociation follow-up
Continuous progress magnetic separation sorts.Mongolian iron ore, can be from containing full iron 52-57%% using the ore-dressing technique of three sections of-two stages of magnetic separation of ore grinding
Iron ore in, obtain full iron more than 66%, the rate of recovery be more than 94% iron ore concentrate.
3rd, 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
Aluminum sulfate and the mixture of ammonium fluosilicate or mass ratio 1-2:PH of the mixture of 3-2 aluminum sulfate and 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
Amount compares 3-2:2-1:The collecting agent of 1-0.5 amylic sodium xanthogenates, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, in pH
Regulator and activator level are 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；Made with roughing iron ore concentrate
Raw material is scanned for flotation, with mass ratio 3-2:2-1:1-0.5 amylic sodium xanthogenates, sodium ethylxanthate and fourth Sodium Aerofloat are as magnetic
The collecting agent of pyrite, collector dosage 0.05-0.15kg/t stir 1-3min, Ran Hou under the conditions of natural slurry temperature
It is scanned under natural ph, obtains sulfur grade 0.1-0.4%, full Iron grade is more than the excellent of 67%, operation recovery 90-94%
Matter iron ore concentrate and scan foam.
4th, iron-flotation magnetic iron ore sorting process is selected using ore grinding-magnetic separation, 2%% Mongolian iron ore can be more than from sulfur-bearing
Shi Zhong obtains sulfur grade 0.1-0.3%, full Iron grade is more than the 67%, fine quality iron concentrate of rate of recovery 87-92%；
5th, the roughing foam that obtains above-mentioned steps and the raw material that foam is incorporated as further selecting sulphur is scanned.
Compared with prior art, the technology of the present invention effect includes：
This technology using three sections of ore grindings-two-stages magnetic separation recycling iron mineral, not only realizes most of iron mineral first
Monomer dissociation, improve magnetic iron ore particle surface by degree of oxidation, and every section of ore grinding is controlled using classifying equipoment
Good mog, 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 regulators, 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, realizes efficiently separating for magnetic iron ore and magnetic iron ore.
The present invention produces I classes of C67 or the ore-dressing technique of II class fine quality iron concentrate using a kind of from Mongolian iron ore, that is, adopts
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,
The sulphur in iron ore concentrate is made to be down to less than 0.4%, and the rate of recovery for ensureing iron ore concentrate not only reduces iron ore concentrate more than 87%
Sulfur content, eliminate influence of the sulphur to subsequent job, and reduce the loss of iron ore concentrate, and produce I classes of C67 or II class
Fine quality iron concentrate.
It should be appreciated that above general description and following detailed description are only exemplary and explanatory, not
It can the limitation present invention.
Description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and the principle for explaining the present invention together with specification.
Fig. 1 is the flow chart for the ore-dressing technique for producing 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 put into practice it
.
Embodiment 1
A kind of ore-dressing technique that fine quality iron concentrate is produced from Mongolian iron ore, mainly including following components：
The 1st, Mongolian iron ore is carried out to primary grinding (3.2 × 4.5m of grinding machine model Φ) first, primary grinding product enters
Grader carries out scalping operation, obtains scalping sand setting product and scalping overflow product；
2nd, the scalping sand setting product obtained with above-mentioned steps carries out secondary grinding (3.6 × 4.0m of grinding machine model Φ),
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；
3rd, the secondary grading sand setting product obtained with above-mentioned steps carries out three sections of ore grindings (3.6 × 6.0m of grinding machine model Φ),
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；
4th, using the secondary grading overflow product of above-mentioned steps acquisition and three times after Grading Overflow product mix as a magnetic
The raw material of choosing carries out magnetic separation under the conditions of magnetic field intensity 143kA/m, obtains a stages of magnetic separation rough concentrate, and throws except part tailing；It will
One stages of magnetic separation rough concentrate carries out secondary magnetic separation under the conditions of magnetic field intensity 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 full iron
In 53.20%% iron ore, full Iron grade 67.00%, the iron ore concentrate of the rate of recovery 96.85% are obtained；
5th, 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 regulators and activator, using mass ratio 2:1.5:0.5 amylic sodium xanthogenate, sodium ethylxanthate and fourth Sodium Aerofloat are 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；
6th, the roughing iron ore concentrate obtained using above-mentioned steps scans raw material as flotation, with mass ratio 2:1.5:0.5 amyl is yellow
The collecting agent of ortho acid sodium, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, collector dosage 0.1kg/t, in natural ore deposit
3min is stirred under the conditions of slurry temperature degree, is then scanned under natural ph, obtains sulfur grade 0.19%, full Iron grade
68.10%th, the fine quality iron concentrate of operation recovery 91.21% and foam is scanned；
7th, 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, sulfur grade 0.19%, full Iron grade 68.10%, the fine quality iron concentrate of the rate of recovery 88.33% are obtained；
8th, the roughing foam that obtains above-mentioned steps and the raw material that foam is incorporated as further selecting sulphur is scanned.
Embodiment 2
A kind of ore-dressing technique that fine quality iron concentrate is produced from Mongolian iron ore, mainly including following components：
The 1st, Mongolian iron ore is carried out to primary grinding (3.2 × 4.5m of grinding machine model Φ) first, primary grinding product enters
Grader carries out scalping operation, obtains scalping sand setting product and scalping overflow product；
2nd, the scalping sand setting product obtained with above-mentioned steps carries out secondary grinding (3.6 × 4.0m of grinding machine model Φ),
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；
3rd, the secondary grading sand setting product obtained with above-mentioned steps carries out three sections of ore grindings (3.6 × 6.0m of grinding machine model Φ),
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；
4th, using the secondary grading overflow product of above-mentioned steps acquisition and three times after Grading Overflow product mix as a magnetic
The raw material of choosing carries out magnetic separation under the conditions of magnetic field intensity 151kA/m, obtains a stages of magnetic separation rough concentrate, and throws except part tailing；It will
One stages of magnetic separation rough concentrate carries out secondary magnetic separation under the conditions of magnetic field intensity 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 full iron
In 55.70% iron ore, full Iron grade 66.60%, the iron ore concentrate of the rate of recovery 96.62% are obtained；
5th, 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 regulators and activator level be 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；
6th, the roughing iron ore concentrate obtained using above-mentioned steps scans raw material as flotation, 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
3min is stirred under temperature conditionss, is 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；
7th, 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, sulfur grade 0.38%, full Iron grade 67.80%, the fine quality iron concentrate of the rate of recovery 87.10% are obtained；
8th, the roughing foam that obtains above-mentioned steps and the raw material that foam is incorporated as further selecting sulphur is scanned.
Embodiment 3
A kind of ore-dressing technique that fine quality iron concentrate is produced from Mongolian iron ore, mainly including following components：
The 1st, Mongolian iron ore is carried out to primary grinding (3.2 × 4.5m of grinding machine model Φ) first, primary grinding product enters
Grader carries out scalping operation, obtains scalping sand setting product and scalping overflow product；
2nd, the scalping sand setting product obtained with above-mentioned steps carries out secondary grinding (3.6 × 4.0m of grinding machine model Φ),
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；
3rd, the secondary grading sand setting product obtained with above-mentioned steps carries out three sections of ore grindings (3.6 × 6.0m of grinding machine model Φ),
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；
4th, using the secondary grading overflow product of above-mentioned steps acquisition and three times after Grading Overflow product mix as a magnetic
The raw material of choosing carries out magnetic separation under the conditions of magnetic field intensity 147kA/m, obtains a stages of magnetic separation rough concentrate, and throws except part tailing；It will
One stages of magnetic separation rough concentrate carries out secondary magnetic separation under the conditions of magnetic field intensity 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 full iron
In 55.60%% iron ore, full Iron grade 66.80%, the iron ore concentrate of the rate of recovery 96.11% are obtained；
5th, using the iron ore concentrate that above-mentioned steps obtain as the raw material of flotation magnetic iron ore, with mass ratio 1:1.2 aluminum sulfate and
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, one roughing is carried out after stirring 5min, obtain roughing iron ore concentrate and
Roughing foam；
6th, the roughing iron ore concentrate obtained using above-mentioned steps scans raw material as flotation, with mass ratio 2:1.5:0.5 amyl is yellow
The collecting agent of ortho acid sodium, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, collector dosage 0.1kg/t, in natural ore deposit
3min is stirred under the conditions of slurry temperature degree, is then scanned under natural ph, obtains sulfur grade 0.23%, full Iron grade
67.90%th, the fine quality iron concentrate of operation recovery 90.78% and foam is scanned；
7th, 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, sulfur grade 0.23%, full Iron grade 67.90%, the fine quality iron concentrate of the rate of recovery 87.32% are obtained；
8th, the roughing foam that obtains above-mentioned steps and the raw material that foam is incorporated as further selecting sulphur is scanned.
It should be appreciated that the invention is not limited in the flow and structure that are described above and are shown in the 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 appended claim
System.
Claims (3)
1. a kind of ore-dressing technique that fine quality iron concentrate is produced from iron ore, which is characterized in that using three sections of ore grindings-divide three times
- two stages of magnetic separation of grade select iron-flotation magnetic iron ore ore dressing, obtain iron ore concentrate by three sections of ore grindings-two-stages magnetic separation first；Using
Efficient activator and pH regulators, are activated magnetic iron ore mineral surfaces, and control the mineral surfaces in ore pulp
State-of-charge；Using the combined capturing and collecting agent with preferable selectivity and collecting performance, the magnetic iron ore different to degree of oxidation is simultaneously
Collecting greatly reduces the sulfur content in iron ore concentrate, obtains I classes of C67 or II class fine quality iron concentrate；
1) three sections of-two stages of magnetic separation of ore grinding select iron；
A. primary grinding scalping：Mongolian iron ore is subjected to primary grinding first, primary grinding product enter grader into
Row scalping operation, obtains scalping sand setting product and scalping overflow product, and scalping overflow product granularity-
200 mesh account for 60-65%；
B. secondary grinding secondary grading：Scalping sand setting product carries out secondary grinding and obtains secondary grinding product, secondary grinding
Product returns to scalping and carries out Inspection graduation；Scalping overflow product enters hydrocyclone and carries out secondary grading operation,
Secondary grading sand setting product and secondary grading overflow product are obtained, -200 mesh of secondary grading overflow product granularity accounts for 70-76%；
C. three sections of ore grindings are classified three times：Secondary grading sand setting product carries out three sections of ore grindings, and three sections of ore milling products enter hydraulic cyclone
Device carries out graded operation three times, is classified sand setting product and three times Grading Overflow product three times, three times Grading Overflow product grain
- 200 mesh of degree account for 70-79%, are classified sand setting product three times and continue ore grinding back to three sections of grinding machines；
D. using secondary grading overflow product and three times, for Grading Overflow product mix as the raw material of magnetic separation, -200 mesh of granularity accounts for 70-
77%；
E. a magnetic separation：Using secondary grading overflow product and three times after Grading Overflow product mix as raw material, in magnetic field intensity
Magnetic separation is carried out under the conditions of 135-159kA/m, a stages of magnetic separation rough concentrate is obtained, and throws except part tailing；
F. two magnetic separation：One stages of magnetic separation rough concentrate under the conditions of magnetic field intensity 119-135kA/m is subjected to secondary magnetic separation, is obtained complete
Iron is more than the two stages of magnetic separation iron ore concentrates and chats that the 66%, rate of recovery is more than 94%, and middling recurrence carries out ore grinding to three sections of grinding machines, makes
Continue magnetic separation after iron mineral monomer dissociation to sort；
2) floatation desulphurization
A. the activation of magnetic iron ore：Using secondary magnetic separation of iron ore concentrate as the raw material of flotation magnetic iron ore, using aluminum sulfate as magnetic
The pH regulators and activator of pyrite, pH regulators and activator level are 1.5-3.5kg/t, and 3- is stirred under natural temperature
8min, adjustment pH value 4.5-5.5；
B. desulfurization roughing：Using magnetic iron ore activation ore pulp as roughing flotation raw material, mass ratio 3-2 is added in the raw material:2-
1:The collecting agent of 1-0.5 amylic sodium xanthogenates, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, in collector dosage
1-5min is stirred under 0.2-0.5kg/t, natural temperature, carries out roughing, obtains roughing iron ore concentrate and roughing foam；
C. desulfurization is scanned：Raw material is scanned using roughing iron ore concentrate as flotation, with mass ratio 3-2:2-1:1-0.5 amyl xanthic acid
The collecting agent of sodium, sodium ethylxanthate and fourth Sodium Aerofloat as magnetic iron ore, collector dosage 0.05-0.15kg/t, in nature
1-3min is stirred under the conditions of slurry temperature, is then scanned under natural ph, obtains sulfur grade 0.1-0.4%, Quan Tiepin
Position is more than the fine quality iron concentrate of 67%, operation recovery 90-94% and scans foam；
D., roughing foam that desulfurization roughing obtains and desulfurization are scanned to the original scanned foam and be incorporated as further selecting sulphur of acquisition
Material.
2. the ore-dressing technique of fine quality iron concentrate is produced from iron ore according to claim 1, which is characterized in that using quality
Compare 3-1:PH regulator and activator of the mixture of 1-2 aluminum sulfate and ammonium fluosilicate as magnetic iron ore.
3. the ore-dressing technique of fine quality iron concentrate is produced from iron ore according to claim 1, which is characterized in that using quality
Compare 1-2:PH regulator and activator of the mixture of 3-2 aluminum sulfate and sodium phosphate as magnetic iron ore.
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| CN109604070A (en) * | 2018-12-05 | 2019-04-12 | 遵义市博莱金矿业有限责任公司 | A kind of high-sulfur magnetic iron ore ore dressing medicament and its application method |
| 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 |
| CN113667820A (en) * | 2021-07-20 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Comprehensive and efficient utilization method of Mongolian iron ore |
| CN114609000A (en) * | 2022-05-11 | 2022-06-10 | 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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