CN106111315A - Prepare the method and system of iron ore concentrate - Google Patents
Prepare the method and system of iron ore concentrate Download PDFInfo
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- CN106111315A CN106111315A CN201610626967.XA CN201610626967A CN106111315A CN 106111315 A CN106111315 A CN 106111315A CN 201610626967 A CN201610626967 A CN 201610626967A CN 106111315 A CN106111315 A CN 106111315A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
-
- 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
- B03D3/00—Differential sedimentation
- B03D3/06—Flocculation
Abstract
The invention discloses the method and system preparing iron ore concentrate.Wherein, the method preparing iron ore concentrate includes: iron-stone and dispersant carry out first and sizes mixing processs, in order to obtain having magnetic-particle and mixture that non-magnetic particle out-phase is flocculated；Described mixture and surfactant carry out second size mixing processs, make described magnetic-particle hydrophobic flocculation, in order to obtain containing the mixture of the coagulated particles that is magnetic；And the described mixture containing the coagulated particles that is magnetic is carried out magnetic separation process, in order to obtain iron ore concentrate.The method adds sodium hexameta phosphate as dispersant, the magnetic-particle in elimination solution and the flocculation of non-magnetic particle out-phase, it is achieved dispersion during sizing mixing.Then add surfactant and make sub magnetic debris hydrophobization, form the mixture containing the coagulated particles that is magnetic, make the magnetic-particle of the small particle in ore pulp be prone to magnetic separation, thus the effectively magnetic-particle in magnetic separation ore pulp.
Description
Technical field
The present invention relates to prepare the method for iron ore concentrate and prepare the system of iron ore concentrate.
Background technology
China's iron ore deposit has " lean ", " carefully ", a main feature of " miscellaneous ", and average Iron grade 32% is average ferrum than the world
Grade is low 11 percentage points.Iron ore is as the primary raw material of steel industry, it usually needs could enter after beneficiation enrichment
Blast furnace process.Along with the fast development of steel and iron industry, some easily select iron mine and the higher rich ore of Iron grade constantly to consume.The most such as
What effective exploitation utilizes some Low-grade and hard-to-separate iron ore such as bauxite, high-phosphor oolitic hematite etc. and some industrial solid castoffs
As the iron-containing resources such as Bayer process red mud become main research direction.
Through retrieving existing document and patent, process these iron content by tunnel cave, rotary kiln, shaft furnace or rotary hearth furnace
Resource produces metallized pellet, and then the technique that mill ore magnetic selection produces metal iron powder.But owing to these iron-containing resources exist into
Point complicated, containing more alkali metal refractory material produced corrosion, and the problem such as Iron grade is relatively low, it is impossible to directly as raw material
Carry out the preparation of subsequent metal pellet, need to be further processed, Iron grade can be effectively improved, thus obtain Gao Pin
The iron ore concentrate of position.In recent years, numerous studies have been carried out for the high-grade iron ore concentrate of acquisition both at home and abroad, mainly by single magnetic
The means such as choosing, flotation, effect is poor, and processing cost is higher, it is difficult to obtain high-grade iron ore concentrate.
Accordingly, for the resource of microfine difficulty choosing, magnetic separation is also prepared the method for iron ore concentrate and is required study.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, one object of the present invention
Being to propose a kind of method preparing iron ore concentrate, the method prepares high grade iron concentrate by selectivity hydrophobic flocculation magnetic method,
By adding sodium hexameta phosphate during sizing mixing as dispersant, the magnetic-particle in elimination solution and non-magnetic particle out-phase
Flocculation, it is achieved dispersion.Then add surfactant and make sub magnetic debris hydrophobization, form the mixing containing the coagulated particles that is magnetic
Thing, thus the magnetic-particle of the small particle in effective magnetic separation ore pulp, make the response rate of ferrum significantly improve.
According to an aspect of the present invention, the invention provides a kind of method preparing iron ore concentrate.Reality according to the present invention
Executing example, the method includes: iron-stone and dispersant carry out first and sizes mixing process, in order to obtain having magnetic-particle and non-magnetic
Property granule out-phase flocculation mixture；Described mixture and surfactant carry out second size mixing process, make described magnetic
Grain hydrophobic flocculation, in order to obtain the mixture containing the coagulated particles that is magnetic；And by the described mixing containing the coagulated particles that is magnetic
Thing carries out magnetic separation process, in order to obtain iron ore concentrate.
The method preparing iron ore concentrate according to embodiments of the present invention, adds sodium hexameta phosphate as dispersion during sizing mixing
Agent, eliminates the magnetic-particle in solution and the flocculation of non-magnetic particle out-phase, it is achieved dispersion.Then add surfactant and make weak magnetic
Property particles hydrophobic, formed containing being magnetic the mixture of coagulated particles, make the magnetic-particle of the small particle in ore pulp be prone to magnetic separation,
Thus the effective magnetic-particle in magnetic separation ore pulp.Thus, the method is applicable to multiple microfine difficulty and selects iron-containing resource, and, ferrum
The response rate and grade significantly improve, and, the method flow process is simple, it is easy to operation, be suitable to commercial Application, the production of iron ore concentrate
Cost significantly reduces.
It addition, the method preparing iron ore concentrate according to the above embodiment of the present invention, it is also possible to there is following additional technology
Feature:
According to embodiments of the invention, described iron-stone is selected from bauxite, high-phosphor oolitic hematite and red mud extremely
Few one.
According to embodiments of the invention, the iron-holder of described iron-stone is 10-25 mass %.
According to embodiments of the invention, described dispersant is sodium hexameta phosphate.
According to embodiments of the invention, the consumption of described sodium hexameta phosphate is 2～3kg/ tons.
According to embodiments of the invention, described surfactant is the emulsion containing oleic acid and kerosene.
According to embodiments of the invention, in described surfactant, the content of oleic acid is 1.5～2.0kg/t, containing of kerosene
Amount is 3～4kg/t.
According to embodiments of the invention, the described second speed of agitator sizing mixing process is 1000～1300r/min, during stirring
Between be 10～15min.
According to embodiments of the invention, the background lectromagnetism field that described magnetic separation processes is 0.5～2T.
According to a further aspect in the invention, the invention provides a kind of implement the aforesaid method preparing iron ore concentrate be
System.According to embodiments of the invention, this system includes: the first paste mixer, and described first paste mixer has iron-stone entrance, divides
Powder entrance and have magnetic-particle and non-magnetic particle out-phase flocculation mixture outlet；Second paste mixer, described second adjusts
Pulp grinder has mixture inlet, surfactant entrance and the mixture outlet containing the coagulated particles that is magnetic, and described mixture enters
Mouth is connected with the described mixture outlet with magnetic-particle and the flocculation of non-magnetic particle out-phase；Magnetic separator, described magnetic separation facility
Having magnetic separation thing entrance, magnetic separation particle outlet and nonmagnetics outlet, described magnetic separation thing entrance contains, with described, the coagulated particles that is magnetic
Mixture outlet be connected.
Prepare the system of iron ore concentrate according to an embodiment of the invention, dispersant entrance is set at the first paste mixer, thus
Sodium hexameta phosphate is added as dispersant, the magnetic-particle in elimination solution and non-magnetic particle out-phase wadding during sizing mixing
Solidifying, it is achieved dispersion.Then added surfactant by the surfactant entrance of the second paste mixer and make sub magnetic debris hydrophobization,
Forming the mixture containing the coagulated particles that is magnetic, the magnetic-particle of the small particle in ore pulp is prone to magnetic separation, thus effectively utilizes magnetic
Select the magnetic-particle in machine magnetic separation ore pulp.Thus, this system is applicable to multiple microfine difficulty and selects iron-containing resource, and, returning of ferrum
Yield and grade significantly improve, and, this system structure is simple, it is easy to operation, is suitable to commercial Application, the production cost of iron ore concentrate
Significantly reduce.
According to embodiments of the invention, described second paste mixer is blender.
According to embodiments of the invention, the background lectromagnetism field of described magnetic separator is 0.5～2T.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 shows the schematic flow sheet of the method preparing iron ore concentrate according to an embodiment of the invention；
Fig. 2 shows the structural representation of the system preparing iron ore concentrate according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", " second " feature permissible
Express or implicitly include one or more this feature.Further, in describing the invention, unless otherwise saying
Bright, " multiple " are meant that two or more.
According to an aspect of the present invention, the invention provides a kind of method preparing iron ore concentrate.With reference to Fig. 1, according to this
Inventive embodiment, explains the method preparing iron ore concentrate, and the method includes:
S100 first sizes mixing process
According to embodiments of the invention, iron-stone and dispersant are carried out first and sizes mixing process, obtain that there is magnetic
Grain and the mixture of non-magnetic particle out-phase flocculation.Thus, during sizing mixing, sodium hexameta phosphate is added as dispersant, elimination
Magnetic-particle in solution and the flocculation of non-magnetic particle out-phase, it is achieved dispersion, it is simple to the follow-up magnetic particle aggregation making small particle
Flocculation.
According to embodiments of the invention, iron-stone is selected from bauxite, high-phosphor oolitic hematite and at least the one of red mud
Kind.Thus, the raw material sources that the method is suitable for are wide, it is easy to popularization and application, are suitable to commercial production.
According to embodiments of the invention, the iron-holder of iron-stone is 10-25 mass %.The method of the present invention is particularly suited for
Iron content is low, and the iron-stone of subparticle difficulty choosing, realizes effective to the ore resource being difficult by and trade waste
Utilize, reduce production cost.
According to embodiments of the invention, dispersant is sodium hexameta phosphate.It not metaphosphate due to sodium hexameta phosphate, do not deposit
At (PO3)6 6-The most independent unit, but become chain to connect by multiple phosphorus oxygen tetrahedrons by top, shared angle oxygen atom
Come.When sodium hexameta phosphate is hydrolyzed to multi-phosphate anion agglomerate, a part of group of this agglomerate and iron mine in ore pulp
On thing or magnetic kind surface, iron ion combines, and is adsorbed on surface, and with unadsorbed electronegative group towards aqueous phase so that red
The zeta potential on iron mine surface becomes negative, plays peptizaiton, so that the magnetic-particle in ore pulp and non-magnetic particle out-phase flocculating effect
Good.
According to embodiments of the invention, the consumption of sodium hexameta phosphate is 2～3kg/ tons.Thereby it is ensured that magnetic-particle and non-
The abundant out-phase of magnetic-particle is flocculated.
S200 second sizes mixing process
According to embodiments of the invention, mixture and surfactant are carried out second and sizes mixing processs, make magnetic-particle thin
Water flocculation, obtains the mixture containing the coagulated particles that is magnetic.Thus, add surfactant and make sub magnetic debris hydrophobization, shape
Become containing being magnetic the mixture of coagulated particles, make the magnetic-particle of the small particle in ore pulp be prone to magnetic separation, thus effectively magnetic concentration
Magnetic-particle in slurry.And then, the method is applicable to multiple microfine difficulty and selects iron-containing resource, and, the response rate of ferrum and grade
Significantly improve.
According to embodiments of the invention, surfactant is the emulsion containing oleic acid and kerosene.Oleic acid and kerosene are in ore deposit
After being broken up into emulsion droplet in slurry, oleic acid adsorbs on oil-water interfaces, changes the current potential on emulsion droplet surface, oil water interfacial tension, and
And provide on oil-water interfaces can be at the polar group of water and minerals adsorbed on interfaces.It addition, oleic acid is to iron mineral Surface Fe ion
Specific adsorption effect, contribute to emulsified oil droplet and the selection of iron mineral reunited.
According to embodiments of the invention, in surfactant, the content of oleic acid is 1.5～2.0kg/t, and the content of kerosene is
3～4kg/t.Thus, the content of oleic acid and kerosene is suitable, it is ensured that the magnetic separation particles hydrophobic flocculation in ore pulp, reunites agglomerating
Block, it is simple to screening.
According to embodiments of the invention, the second speed of agitator sizing mixing process is 1000～1300r/min, and mixing time is
10～15min.Thus, under this rotating speed, even if ore mix is sufficiently mixed with the emulsion containing oleic acid and kerosene, make oil
Acid polar group on water and minerals interface, avoids again that rotating speed is too fast makes magnetic-particle be difficult to flocculate, and mixing time 10～
15min can make most magnetic-particle hydrophobic flocculation, avoids again mixing time long, extends the time of technological process.
S300 magnetic separation processes
According to embodiments of the invention, magnetic separation process will be carried out containing the mixture of the coagulated particles that is magnetic, in order to obtain ferrum
Concentrate.Thus, processed by magnetic separation, effectively realize slag sluicing system, it is thus achieved that high-grade iron ore concentrate.Some according to the present invention are real
Executing example, the Iron grade of iron ore concentrate is 35%～55%, and iron recovery is 55%～65%.
According to embodiments of the invention, the background lectromagnetism field that magnetic separation processes is 0.5～2T.Thus, under this background lectromagnetism field, magnetic
Property efficiency high, effective.
The method preparing iron ore concentrate according to embodiments of the present invention, adds sodium hexameta phosphate as dispersion during sizing mixing
Agent, eliminates the magnetic-particle in solution and the flocculation of non-magnetic particle out-phase, it is achieved dispersion.Then add surfactant, make weak
Magnetic-particle hydrophobization, forms the mixture containing the coagulated particles that is magnetic, makes the magnetic-particle of the small particle in ore pulp be prone to magnetic
Choosing, thus the magnetic-particle in effective magnetic separation ore pulp.Thus, the method is applicable to the difficulties such as multiple microfine and selects iron-containing resource, and
And, the response rate and the grade of ferrum significantly improve, and, the method flow process is simple, it is easy to operation, is suitable to commercial Application, iron ore concentrate
Production cost significantly reduce.
According to a further aspect in the invention, the invention provides a kind of implement the aforesaid method preparing iron ore concentrate be
System.According to embodiments of the invention, this system includes: the first paste mixer the 100, second paste mixer 200 and magnetic separator 300.Below
Each device is explained:
First paste mixer 100: according to embodiments of the invention, the first paste mixer 100 has iron-stone entrance 101, divides
Powder entrance 102 and there is magnetic-particle and the mixture outlet 103 of non-magnetic particle out-phase flocculation.Thus, the first paste mixer
During sizing mixing, sodium hexameta phosphate is added as dispersant, the magnetic-particle in elimination solution and non magnetic by powder entrance
Grain out-phase flocculation, it is achieved dispersion, it is simple to the follow-up magnetic particle aggregation making small particle flocculates.
According to embodiments of the invention, iron-stone is selected from bauxite, high-phosphor oolitic hematite and at least the one of red mud
Kind.Thus, the raw material sources that this system is suitable for are wide, it is easy to popularization and application, are suitable to commercial production.
According to embodiments of the invention, the iron-holder of iron-stone is 10-25 mass %.The system of the present invention is particularly suited for
Iron content is low, and the iron-stone of subparticle difficulty choosing, realizes effective to the ore resource being difficult by and trade waste
Utilize, reduce production cost.
According to embodiments of the invention, the consumption of sodium hexameta phosphate is 2～3kg/ tons.Thereby it is ensured that magnetic-particle and non-
The abundant out-phase of magnetic-particle is flocculated.
Second paste mixer 200: according to embodiments of the invention, the second paste mixer has mixture inlet 201, surface activity
Agent entrance 202 and containing being magnetic the mixture outlet 203 of coagulated particles, wherein, mixture inlet 201 with have magnetic-particle and
The mixture outlet 103 of non-magnetic particle out-phase flocculation is connected.Thus, the surfactant entrance through the second paste mixer adds table
Face activating agent makes sub magnetic debris hydrophobization, forms the mixture containing the coagulated particles that is magnetic, and makes the magnetic of small particle in ore pulp
Property granule be prone to magnetic separation, thus the effectively magnetic-particle in magnetic separation ore pulp.And then, this system is applicable to the difficult choosing of multiple microfine
Iron-containing resource, and, the response rate and the grade of ferrum significantly improve.
According to embodiments of the invention, surfactant is the emulsion containing oleic acid and kerosene.Oleic acid and kerosene are in ore deposit
After being broken up into emulsion droplet in slurry, oleic acid adsorbs on oil-water interfaces, changes the current potential on emulsion droplet surface, oil water interfacial tension, and
And provide on oil-water interfaces can be at the polar group of water and minerals adsorbed on interfaces.It addition, oleic acid is to iron mineral Surface Fe ion
Specific adsorption effect, contribute to emulsified oil droplet and the selection of iron mineral reunited.
According to embodiments of the invention, in surfactant, the content of oleic acid is 1.5～2.0kg/t, and the content of kerosene is
3～4kg/t.Thus, the content of oleic acid and kerosene is suitable, it is ensured that the magnetic separation particles hydrophobic flocculation in ore pulp, reunites agglomerating
Block, it is simple to screening.
According to embodiments of the invention, the second paste mixer is blender.Thus, equipment is simple, and efficiency of sizing mixing is high, effect
The best
Magnetic separator 300: according to embodiments of the invention, magnetic separator 300 has magnetic separation thing entrance 301, magnetic separation particle outlet
302 and nonmagnetics outlet 303, wherein, magnetic separation thing entrance 301 is connected with containing the mixture outlet 203 of coagulated particles of being magnetic.
Thus, processed by magnetic separation, effectively realize slag sluicing system, it is thus achieved that high-grade iron ore concentrate.According to some embodiments of the present invention,
The Iron grade of iron ore concentrate is 35%～55%, and iron recovery is 55%～65%.
According to embodiments of the invention, the background lectromagnetism field of magnetic separator is 0.5～2T.Thus, under this background lectromagnetism field, magnetic
Efficiency is high, effective.
Prepare the system of iron ore concentrate according to an embodiment of the invention, dispersant entrance is set at the first paste mixer, thus
Sodium hexameta phosphate is added as dispersant, the magnetic-particle in elimination solution and non-magnetic particle out-phase wadding during sizing mixing
Solidifying, it is achieved dispersion.Then added surfactant by the surfactant entrance of the second paste mixer, make sub magnetic debris hydrophobic
Changing, form the mixture containing the coagulated particles that is magnetic, the magnetic-particle of the small particle in ore pulp is prone to magnetic separation, thus effectively utilizes
Magnetic-particle in magnet separator magnetic ore dressing slurry.Thus, this system is applicable to multiple microfine difficulty and selects iron-containing resource, and, ferrum
The response rate and grade significantly improve, and, this system structure is simple, it is easy to operation, is suitable to commercial Application, and the production of iron ore concentrate becomes
Originally significantly reduce.
Below with reference to specific embodiment, the present invention will be described, it should be noted that these embodiments are only explanation
Property, and be not considered as limiting the invention.
Embodiment 1
The method utilizing the present invention, prepares iron ore concentrate with somewhere Bayer process red mud for raw material, wherein, and the TFe matter of this red mud
Amount mark is 21.52%, and concrete grammar is as follows:
(1) red mud is added water size mixing, and add the sodium hexameta phosphate of 2kg/t as dispersant, eliminate the magnetic in solution
Granule and the flocculation of non-magnetic particle out-phase, it is achieved dispersion.
(2) emulsion adding surfactant oleic acid and kerosene in mixture step (1) obtained makes weak magnetic
Grain hydrophobization, wherein oleic acid consumption is 1.5kg/t, and kerosene consumption is 3kg/t, and carry out high speed machine stirring size mixing, stirring
Machine rotating speed is 1000r/min, and mixing time is 10min, makes hydrophobic granule generation hydrophobic flocculation.
(3) pulp conveying that step (2) processed through selectivity hydrophobic flocculation method is sorted to intensity magnetic separator, the back of the body
Scape field intensity is 0.8T.The Iron grade of the final iron ore concentrate obtained is 43.37%, and iron recovery is 57.21%.
Embodiment 2
The method utilizing the present invention, prepares iron ore concentrate with somewhere bauxite for raw material, wherein, and the TFe mass of this bauxite
Mark is 11.52%, and concrete grammar is as follows:
(1) bauxite is added water size mixing, and add the sodium hexameta phosphate of 2.5kg/t as dispersant, eliminate in solution
Magnetic-particle and the flocculation of non-magnetic particle out-phase, it is achieved dispersion.
(2) emulsion adding surfactant oleic acid and kerosene in mixture step (1) obtained makes weak magnetic
Grain hydrophobization, wherein oleic acid consumption is 1.5kg/t, and kerosene consumption is 3.5kg/t, and carry out high speed machine stirring size mixing, stir
The machine rotating speed of mixing is 1200r/min, and mixing time is 13min, makes hydrophobic granule generation hydrophobic flocculation.
(3) pulp conveying that step (2) processed through selectivity hydrophobic flocculation method is sorted to intensity magnetic separator, the back of the body
Scape field intensity is 0.9T.The Iron grade of the final iron ore concentrate obtained is 38.37%, and iron recovery is 56.41%.
Embodiment 3
The method utilizing the present invention, prepares iron ore concentrate with somewhere Bayer process red mud for raw material, wherein, and the TFe matter of this red mud
Amount mark is 21.52%, and concrete grammar is as follows:
(1) bloodstone is added water size mixing, and add the sodium hexameta phosphate of 3kg/t as dispersant, eliminate the magnetic in solution
Property granule and non-magnetic particle out-phase flocculation, it is achieved dispersion.
(2) emulsion adding surfactant oleic acid and kerosene in mixture step (1) obtained makes weak magnetic
Grain hydrophobization, wherein oleic acid consumption is 2.0kg/t, and kerosene consumption is 4kg/t, and carry out high speed machine stirring size mixing, stirring
Machine rotating speed is 1300r/min, and mixing time is 15min, makes hydrophobic granule generation hydrophobic flocculation.
(3) pulp conveying that step (2) processed through selectivity hydrophobic flocculation method is sorted to intensity magnetic separator, the back of the body
Scape field intensity is 0.8T.The Iron grade of the final iron ore concentrate obtained is 53.37%, and iron recovery is 58.21%.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
These embodiments can be carried out multiple change in the case of departing from the principle of the present invention and objective, revise, replace and modification, this
The scope of invention is limited by claim and equivalent thereof.
Claims (10)
1. the method preparing iron ore concentrate, it is characterised in that including:
Iron-stone and dispersant carry out first size mixing processs, in order to obtain that there is magnetic-particle and non-magnetic particle out-phase is wadded a quilt with cotton
Solidifying mixture；
Described mixture and surfactant carry out second size mixing process, make described magnetic-particle hydrophobic flocculation, in order to obtain
Mixture containing the coagulated particles that is magnetic；And
The described mixture containing the coagulated particles that is magnetic is carried out magnetic separation process, in order to obtain iron ore concentrate.
Method the most according to claim 1, it is characterised in that described iron-stone is red selected from bauxite, high-phosphor oolitic
At least one of iron mine and red mud.
Method the most according to claim 1, it is characterised in that the iron-holder of described iron-stone is 10-25 mass %.
Method the most according to claim 1, it is characterised in that described dispersant is sodium hexameta phosphate,
Optionally, the consumption of described sodium hexameta phosphate is 2～3kg/ tons.
Method the most according to claim 1, it is characterised in that described surfactant is the emulsifying containing oleic acid and kerosene
Liquid,
Optionally, in described surfactant, the content of oleic acid is 1.5～2.0kg/t, and the content of kerosene is 3～4kg/t.
Method the most according to claim 1, it is characterised in that described second size mixing process speed of agitator be 1000～
1300r/min, mixing time is 10～15min.
Method the most according to claim 1, it is characterised in that the background lectromagnetism field that described magnetic separation processes is 0.5～2T.
8. the system of the method preparing iron ore concentrate implemented described in any one of claim 1-7, it is characterised in that including:
First paste mixer, described first paste mixer has iron-stone entrance, dispersant entrance and has magnetic-particle and non-magnetic
Property granule out-phase flocculation mixture outlet；
Second paste mixer, described second paste mixer has mixture inlet, surfactant entrance and contains the coagulated particles that is magnetic
Mixture outlet, described mixture inlet with described have magnetic-particle and non-magnetic particle out-phase flocculation mixture outlet
It is connected；
Magnetic separator, described magnetic separator has magnetic separation thing entrance, magnetic separation particle outlet and nonmagnetics outlet, described magnetic separation thing entrance
It is connected with the described mixture outlet containing the coagulated particles that is magnetic.
System the most according to claim 8, it is characterised in that described second paste mixer is blender.
System the most according to claim 8 or claim 9, it is characterised in that the background lectromagnetism field of described magnetic separator is 0.5～2T.
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