CN109225602A - The method for handling Ultra-low-grade magnetite - Google Patents
The method for handling Ultra-low-grade magnetite Download PDFInfo
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- CN109225602A CN109225602A CN201810887314.6A CN201810887314A CN109225602A CN 109225602 A CN109225602 A CN 109225602A CN 201810887314 A CN201810887314 A CN 201810887314A CN 109225602 A CN109225602 A CN 109225602A
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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
Abstract
The invention discloses a kind of methods for handling Ultra-low-grade magnetite, this method comprises: Ultra-low-grade magnetite is carried out wet ground by (1), to obtain ore pulp；(2) ore pulp is mixed with the first collecting agent, foaming agent and carries out iron concentrate flotation, to obtain iron concentrate and sulphur flotation tailing；(3) the sulphur flotation tailing and regulator, the second collecting agent, inhibitor mixed are subjected to phosphorus concentrate flotation, to obtain phosphorus concentrate and phosphorus flotation tailing；(4) the phosphorus flotation tailing is subjected to low intensity magnetic separation, to obtain iron ore concentrate and tailing.The method achieve the synthetical recoveries of iron, sulphur, phosphorus valuable component in Ultra-low-grade magnetite, significantly improve the ore-dressing technique of existing Ultra-low-grade magnetite.
Description
Technical field
The invention belongs to technical field of mineral processing, specifically, the present invention relates to the methods of processing Ultra-low-grade magnetite.
Background technique
China's iron resource natural endowment is poor, and from the point of view of the grade of iron ore, China's iron ore is based on lean ore.It is easy to sort processing
Magnetite ore, with the exploitation of many years, high grade ore is exploited totally, and the cutoff grade of development and utilization gradually reduces.
In this case, many iron ore deposits utilized that can not sort in the past are paid attention to, and super low-grade magnetite is it
In it is very typical a kind of.Super low-grade magnetite is mainly distributed on China Chengde area, is prominent domestic big mausoleum formula
The sub- mineral of one of vanadium titano-magnetite.Compared with general iron ore, every kind of valuable component content is significant low in the type ore
In the cutoff grade that current prior art can develop and use.Such general P of ore2O5Content is in 3wt% hereinafter, S content exists
0.5wt% or so, MFe (Armco magnetic iron) content is in 7wt% or so.In such ore, magnetic iron content is very low, individually picks up it
In iron mineral, economic benefit is not significant, but strictly according to the facts now valuable component comprehensive utilization, economic benefit can be greatly improved.
Currently, the comprehensive utilization of super low-grade vanadium titano-magnetite is also not on a large scale, iron is only recycled in most mines, a small number of right
Phosphorus, titanium resource are recycled, but first to select iron as top priority, then sort phosphorus, titanium etc., whole ore-dressing technique needs into one
Step is improved and is improved.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of method for handling Ultra-low-grade magnetite.The method achieve iron, sulphur, phosphorus in Ultra-low-grade magnetite are valuable
The synthetical recovery of component significantly improves the ore-dressing technique of existing Ultra-low-grade magnetite.
In one aspect of the invention, according to the present invention the invention proposes a kind of method for handling Ultra-low-grade magnetite
Embodiment, this method comprises:
(1) Ultra-low-grade magnetite is subjected to wet ground, to obtain ore pulp；
(2) ore pulp is mixed with the first collecting agent, foaming agent and carries out iron concentrate flotation, to obtain iron concentrate and sulphur
Flotation tailing；
(3) the sulphur flotation tailing and regulator, the second collecting agent, inhibitor mixed are subjected to phosphorus concentrate flotation, so as to
Obtain phosphorus concentrate and phosphorus flotation tailing；
(4) the phosphorus flotation tailing is subjected to low intensity magnetic separation, to obtain iron ore concentrate and tailing.
The method of processing Ultra-low-grade magnetite according to an embodiment of the present invention, by floating Ultra-low-grade magnetite progress iron concentrate
Choosing, can be obtained the iron concentrate that sulfur content is greater than 40%, and sulfur recovery rate is greater than 70%；By the way that sulphur flotation tailing progress phosphorus concentrate is floated
Choosing, can be obtained the phosphorus concentrate that phosphorus pentoxide content is greater than 33%, and the rate of recovery of phosphorus pentoxide is greater than 80%；By the way that phosphorus is floated
It selects tailing to carry out low intensity magnetic separation, the iron ore concentrate that TFe content is greater than 65% can be obtained, the rate of recovery of MFe Armco magnetic iron is greater than 95%, and iron
Sulfur content is lower than 0.3% in concentrate, and phosphorus content is lower than 0.15%.Hereby it is achieved that valuable group of iron, sulphur, phosphorus in Ultra-low-grade magnetite
The synthetical recovery divided, significantly improves the ore-dressing technique of existing Ultra-low-grade magnetite.
In addition, the method for processing Ultra-low-grade magnetite according to the above embodiment of the present invention can also have following additional skill
Art feature:
In some embodiments of the invention, in step (2), the ore pulp and first collecting agent, the blistering
The mass ratio of agent is 100000:3~2:2~2.5.Be conducive to improve the flotation efficiency and product quality of iron concentrate as a result,.
In some embodiments of the invention, in step (3), the phosphorus concentrate flotation include roughing, scan with it is selected.
Be conducive to improve the product quality of phosphorus concentrate as a result,.
In some embodiments of the invention, in step (3), the sulphur flotation tailing and the regulator, described the
Two collecting agents, the inhibitor mass ratio be 10000:1.2~1.8:1.5~1.8:2~2.4.Be conducive to improve phosphorus as a result,
The flotation efficiency of concentrate and the quality for further increasing phosphorus concentrate.
In some embodiments of the invention, in step (4), the low intensity magnetic separation includes roughing, fine grinding and selected.By
This, is conducive to the product quality for improving iron ore concentrate.
In some embodiments of the invention, in step (4), the magnetic separation strength of the roughing is 219-159kA/m.By
This, can further improve the product quality of iron ore concentrate.
In some embodiments of the invention, in step (4), the selected magnetic field strength is 76-116kA/m.By
This, can further improve the product quality of iron ore concentrate.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the method flow schematic diagram of processing Ultra-low-grade magnetite according to an embodiment of the invention；
Fig. 2 is the system structure signal according to an embodiment of the invention for implementing to handle the method for Ultra-low-grade magnetite
Figure.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In one aspect of the invention, according to the present invention the invention proposes a kind of method for handling Ultra-low-grade magnetite
Embodiment, with reference to Fig. 1, this method comprises:
S100: Ultra-low-grade magnetite is subjected to wet ground
In the step, Ultra-low-grade magnetite is subjected to wet ground, to obtain ore pulp.The partial size of the ore pulp Minerals can be with
For 50% or more the accounting less than 0.074mm, the mass concentration of ore pulp Minerals can be 30~40wt%.
S200: ore pulp is mixed with the first collecting agent, foaming agent and carries out iron concentrate flotation
In the step, ore pulp is mixed with the first collecting agent, foaming agent and carries out iron concentrate flotation, so as to obtain iron concentrate and
Sulphur flotation tailing.Specifically, at normal temperature, using the first collecting agent, foaming agent to sulphur such as pyrite, magnetic iron ore in ore pulp
Change iron mineral and carry out flotation, obtain the iron concentrate that sulfur content is greater than 40%, in whole process, the rate of recovery of sulphur is greater than 70%, effect
Fruit is significant.Inventors have found that the hydrophobicity on iron sulfide mineral surface can be enhanced in the first collecting agent, enhance it in conjunction with bubble
Ability, foaming agent help to be formed in ore pulp stablize, scale is suitable, the sufficient bubble of quantity, in the first collecting agent and blistering
Under the synergistic effect of agent, facilitate the flotation recovery of iron sulfide mineral.
According to one embodiment of present invention, the mass ratio of ore pulp and the first collecting agent, foaming agent can be 100000:3
~2:2~2.5.Inventors have found that the first collecting agent and the too low rate of recovery that can significantly reduce iron sulfide mineral of foaming agent, and mistake
Height will cause the waste of resource.
Still another embodiment in accordance with the present invention, the first collecting agent can be butyl xanthate, isopropyl xanthate, amyl group xanthate
At least one of.Inventors have found that the first collecting agent of the above-mentioned type can combine closely with iron sulfide mineral, vulcanization is realized
The strength collecting of iron mineral.
According to still another embodiment of the invention, foaming agent can in 2# oil and methyl isobutyl carbinol at least it
One.As a result, the flotation of iron concentrate can be realized with the first collecting agent collective effect.
According to still another embodiment of the invention, iron concentrate flotation can successively include roughing, scan with it is selected.Specifically,
Roughing operation obtains sulphur rough concentrate and sulphur rougher tailings, and the medicament used is the first collecting agent and foaming agent, and ore pulp is caught with first
Receive agent, the mass ratio of foaming agent can be 100000:1.9-1.1:1.1-1.4；The sulphur rough concentrate that roughing operation obtains feeds essence
It is elected to be industry, medicament is not added in selected operation；The sulphur rougher tailings that roughing operation obtains, which is fed, scans operation, strengthens iron sulfide mineral
Collecting, the medicament used is the first collecting agent and foaming agent, and the mass ratio of sulphur rougher tailings and the first collecting agent, foaming agent can
Think 100000:1.1~0.9:0.9~1.1, sulphur flotation tailing is obtained after scanning.Yellow iron in iron concentrate is obtained after featured
Mine and magnetic iron ore accounting are greater than 75wt%, and the oxidations such as quartz and silicate mineral accounting are less than 25wt%.It is according to the present invention
One specific embodiment, iron concentrate flotation may include one roughing, once purging selection and triple cleaning.Sulphur can be obtained as a result, to contain
Amount is greater than 40% iron concentrate, and sulfur recovery rate is greater than 70%.
S300: sulphur flotation tailing and regulator, the second collecting agent, inhibitor mixed are subjected to phosphorus concentrate flotation
In the step, sulphur flotation tailing and regulator, the second collecting agent, inhibitor mixed are subjected to phosphorus concentrate flotation, with
Just phosphorus concentrate and phosphorus flotation tailing are obtained.Specifically, at normal temperature, it is floating to sulphur using regulator, the second collecting agent and inhibitor
It selects the Phosphate minerals such as the apatite in tailing to be recycled, obtains the phosphorus concentrate that phosphorus pentoxide content is greater than 33%, whole process
In, the rate of recovery of phosphorus pentoxide is greater than 80%, significant effect.Inventors have found that sulphur flotation tailing is sufficiently mixed with regulator,
The surface characteristic for advantageously forming suitable Phosphate minerals flotation further increases Phosphate minerals and other arteries and veins under the action of inhibitor
The surface property differences of stone ore object can strengthen the flotation of Phosphate minerals under the action of the second collecting agent, obtain comparatively ideal phosphorus ore
Object flotation effect.
According to one embodiment of present invention, sulphur flotation tailing and regulator, the second collecting agent, inhibitor mass ratio can
Think 10000:1.2~1.8:1.5~1.8:2~2.4.Inventors have found that sulphur flotation tailing and regulator, the second collecting agent,
The mass ratio of inhibitor is not answered too high or too low, and wherein regulator and when excessively high inhibitor, significantly affects the floatability of Phosphate minerals
Can, the rate of recovery of Phosphate minerals is reduced, it is too low, sufficient adjustment effect can not be had to ore pulp, it is difficult to it is same sufficiently to expand Phosphate minerals
The difference of surface nature between gangue mineral；The excessively high quality that can significantly reduce phosphorus concentrate of second collecting agent, it is too low to also result in
The rate of recovery of Phosphate minerals declines.
Still another embodiment in accordance with the present invention, regulator can be at least one of sodium carbonate, sodium bicarbonate.Invention
People's discovery, above-mentioned regulator can effectively adjust slurry pH, and eliminate the shadow of calcium ion excessive in ore pulp, magnesium ion
It rings.
According to still another embodiment of the invention, the second collecting agent can be in oxidized paraffin wax soap class or oleic-acid collecting agent
At least one of.Inventors have found that above-mentioned second collecting agent can effective collecting Phosphate minerals.
According to still another embodiment of the invention, inhibitor can be at least one of waterglass, acidified sodium silicate.Hair
Bright people's discovery, above-mentioned inhibitor have significant inhibiting effect to gangue minerals such as silicates under suitable amounts.
According to still another embodiment of the invention, phosphorus concentrate flotation can successively include roughing, scan with it is selected.Specifically,
Sulphur flotation tailing obtains phosphorus rough concentrate and phosphorus rougher tailings after roughing operation, and the medicament used is regulator, the second collecting agent
And inhibitor, sulphur flotation tailing ore pulp and regulator, the second collecting agent, inhibitor mass ratio can for 10000:1.2~
1.8:1~1.2:1~1.2；The phosphorus rough concentrate that roughing operation obtains feeds selected operation, and inhibitor is added in selected operation, and phosphorus is thick
The mass ratio of concentrate pulp and inhibitor is 10000:1~1.2；The phosphorus rougher tailings that roughing operation obtains, which is fed, scans operation,
Strengthen the collecting of Phosphate minerals, the medicament used is the second collecting agent, and phosphorus rougher tailings ore pulp and the mass ratio of the second collecting agent are
10000:0.5~0.6 obtains phosphorus flotation tailing after scanning, and available apatite accounting is greater than 78.5%, Fang Xie after featured
The phosphorus concentrate of the oxidations such as stone, quartz and silicate mineral accounting less than 21.5%.A specific embodiment according to the present invention, phosphorus
Concentrate flotation may include that one roughing, once purging selection and four times are selected.Phosphorus pentoxide content can be obtained as a result, greater than 33%
Phosphorus concentrate, the rate of recovery of phosphorus pentoxide is greater than 80%.
S400: phosphorus flotation tailing is subjected to low intensity magnetic separation
In the step, phosphorus flotation tailing is subjected to low intensity magnetic separation, to obtain iron ore concentrate and tailing.Specifically, by phosphorus flotation
Tailing carries out magnetic separation under the action of low-intensity magnetic field, recycles the magnetic iron ore in phosphorus flotation tailing, and TFe content can be obtained and be greater than 65%
The rate of recovery of iron ore concentrate, MFe (Armco magnetic iron) is greater than 95%, and the sulfur content in gained iron ore concentrate, less than 0.3%, P content is less than
0.15%, compared with existing Ultra-low-grade magnetite ore-dressing technique, there is significant effect.
According to one embodiment of present invention, low intensity magnetic separation may include roughing, fine grinding and selected.One according to the present invention
Specific embodiment, low intensity magnetic separation may include one roughing, a fine grinding and primary cleaning.Specifically, first phosphorus flotation tailing is existed
Roughing is carried out under the magnetic field strength of 219-159kA/m, obtains iron roughing mine and iron rougher tailings, then the iron roughing mine is carried out carefully
Mill, be finely ground to partial size less than 0.074mm accounting be greater than 80%, then by the iron roughing mine after fine grinding 76-116kA/m magnetic
It carries out selected under field intensity, obtains iron ore concentrate and iron cleaner tailings, wherein on the sum of iron rougher tailings and iron cleaner tailings be
State tailing.The iron ore concentrate that TFe content is greater than 65% can be obtained as a result, the rate of recovery of MFe (Armco magnetic iron) is greater than 95%, and gained
Sulfur content in iron ore concentrate is less than 0.3%, and P content is less than 0.15%, compared with existing Ultra-low-grade magnetite ore-dressing technique, has aobvious
The effect of work.Inventors have found that magnetic field strength is excessively high to will cause concentrate product iron content in iron ore concentrate roughing and refining process
Reduction, be unfavorable for obtaining qualified concentrate product；The too low drop that will cause the ferro element rate of recovery in concentrate product of magnetic field strength
It is low, it is unfavorable for obtaining ideal metal recovery rate.
The method of processing Ultra-low-grade magnetite according to an embodiment of the present invention, by floating Ultra-low-grade magnetite progress iron concentrate
Choosing, can be obtained the iron concentrate that sulfur content is greater than 40%, and sulfur recovery rate is greater than 70%；By the way that sulphur flotation tailing progress phosphorus concentrate is floated
Choosing, can be obtained the phosphorus concentrate that phosphorus pentoxide content is greater than 33%, and the rate of recovery of phosphorus pentoxide is greater than 80%；By the way that phosphorus is floated
It selects tailing to carry out low intensity magnetic separation, the iron ore concentrate that TFe content is greater than 65% can be obtained, the rate of recovery of MFe Armco magnetic iron is greater than 95%, and iron
Sulfur content is lower than 0.3% in concentrate, and phosphorus content is lower than 0.15%.Hereby it is achieved that valuable group of iron, sulphur, phosphorus in Ultra-low-grade magnetite
The synthetical recovery divided, significantly improves the ore-dressing technique of existing Ultra-low-grade magnetite.
In order to facilitate understanding, below to the processing Ultra-low-grade magnetite of the method for implementing above-mentioned processing Ultra-low-grade magnetite
System is described in detail, according to an embodiment of the invention, the system includes: wet mill unit 100, iron concentrate flotation with reference to Fig. 2
Unit 200, phosphorus concentrate flotation cells 300 and low intensity magnetic separation unit 400.
According to an embodiment of the invention, wet mill unit 100 has Ultra-low-grade magnetite entrance 101 and slurry outlet 102, and suitable
In Ultra-low-grade magnetite is carried out wet ground, to obtain ore pulp.The partial size of the ore pulp Minerals can be for less than 0.074mm's
50% or more accounting, the mass concentration of ore pulp Minerals can be 30~40wt%.
According to an embodiment of the invention, iron concentrate flotation cells 200 have ore pulp entrance 201, the first collecting agent entrance
202, foaming agent entrance 203, iron concentrate outlet 204 and sulphur flotation tailing outlet 205, ore pulp entrance 201 and 102 phase of slurry outlet
Even, and it is suitable for mixing ore pulp into progress iron concentrate flotation with the first collecting agent, foaming agent, to obtain iron concentrate and sulphur flotation tail
Mine.Specifically, at normal temperature, using the first collecting agent, foaming agent to iron sulfide minerals such as pyrite, magnetic iron ore in ore pulp
Flotation is carried out, the iron concentrate that sulfur content is greater than 40% is obtained, in whole process, the rate of recovery of sulphur is greater than 70%, significant effect.Hair
Bright people's discovery, the first collecting agent can be enhanced the hydrophobicity on iron sulfide mineral surface, enhance its ability in conjunction with bubble, blister
Agent help to be formed in ore pulp stablize, scale is suitable, the sufficient bubble of quantity, make in the collaboration of the first collecting agent and foaming agent
Under, facilitate the flotation recovery of iron sulfide mineral.
According to one embodiment of present invention, iron concentrate flotation cells may include that iron concentrate roughing device, iron concentrate are swept
Screening device and iron concentrate selecting device.Specifically, roughing operation obtains sulphur rough concentrate and sulphur rougher tailings, the medicament used is the
One collecting agent and foaming agent, ore pulp and the first collecting agent, foaming agent mass ratio can be 100000:1.9-1.1:1.1-1.4；
The sulphur rough concentrate that roughing operation obtains feeds selected operation, and medicament is not added in selected operation；The sulphur roughing tail that roughing operation obtains
Mine, which is fed, scans operation, strengthens the collecting of iron sulfide mineral, and the medicament used is the first collecting agent and foaming agent, sulphur rougher tailings
Mass ratio with the first collecting agent, foaming agent can be 100000:1.1~0.9:0.9~1.1, and sulphur flotation is obtained after scanning
Tailing.Pyrite and magnetic iron ore accounting in iron concentrate are obtained after featured is greater than 75wt%, the oxidations such as quartz and silicate mine
Object accounting is less than 25wt%.A specific embodiment according to the present invention, iron concentrate flotation may include one roughing, once sweep
Choosing and triple cleaning.The iron concentrate that sulfur content is greater than 40% can be obtained as a result, sulfur recovery rate is greater than 70%.
Still another embodiment in accordance with the present invention, ore pulp and the first collecting agent, foaming agent mass ratio can be 100000:
3~2:2~2.5.Inventors have found that the first collecting agent and the too low rate of recovery that can significantly reduce iron sulfide mineral of foaming agent, and
The excessively high waste that will cause resource.
According to still another embodiment of the invention, the first collecting agent can be yellow for butyl xanthate, isopropyl xanthate, isobutyl group
At least one of medicine, amyl group xanthate.Inventors have found that the first collecting agent of the above-mentioned type can closely be tied with iron sulfide mineral
It closes, realizes the strength collecting of iron sulfide mineral.
According to still another embodiment of the invention, foaming agent can in 2# oil and methyl isobutyl carbinol at least it
One.As a result, the flotation of iron concentrate can be realized with the first collecting agent collective effect.
According to an embodiment of the invention, phosphorus concentrate flotation cells 300 have sulphur flotation tailing entrance 301, regulator entrance
302, the second collecting agent entrance 303, inhibitor entrance 304, phosphorus concentrate outlet 305 and phosphorus flotation tailing outlet 306, sulphur flotation tail
Mine entrance 301 is connected with sulphur flotation tailing outlet 205, and is suitable for sulphur flotation tailing and regulator, the second collecting agent, inhibitor
Mixing carries out phosphorus concentrate flotation, to obtain phosphorus concentrate and phosphorus flotation tailing.Specifically, at normal temperature, using regulator, second
Collecting agent and inhibitor recycle the Phosphate minerals such as apatite in sulphur flotation tailing, obtain phosphorus pentoxide content and are greater than
33% iron concentrate, in whole process, the rate of recovery of phosphorus pentoxide is greater than 80%, significant effect.Inventors have found that sulphur flotation
Tailing is sufficiently mixed with regulator, advantageously forms the surface characteristic of suitable Phosphate minerals flotation, under the action of inhibitor, into one
The surface property differences that step increases Phosphate minerals and other gangue minerals can strengthen Phosphate minerals under the action of the second collecting agent
Flotation obtains comparatively ideal Phosphate minerals flotation effect.
According to one embodiment of present invention, phosphorus concentrate flotation cells include that phosphorus concentrate roughing device, phosphorus concentrate scan dress
It sets and phosphorus concentrate selecting device.Specifically, sulphur flotation tailing obtains phosphorus rough concentrate and phosphorus rougher tailings after roughing operation, use
Medicament be regulator, the second collecting agent and inhibitor, sulphur flotation tailing ore pulp and regulator, the second collecting agent, inhibitor
Mass ratio can be 10000:1.2~1.8:1~1.2:1~1.2；The phosphorus rough concentrate that roughing operation obtains feeds selected operation,
The mass ratio of selected operation addition inhibitor, phosphorus rough concentrate ore pulp and inhibitor is 10000:1~1.2；What roughing operation obtained
Phosphorus rougher tailings, which is fed, scans operation, strengthens the collecting of Phosphate minerals, and the medicament used is the second collecting agent, phosphorus rougher tailings ore pulp
Mass ratio with the second collecting agent is 10000:0.5~0.6, and phosphorus flotation tailing is obtained after scanning, available phosphorus after featured
Lime stone accounting is greater than 78.5%, the phosphorus concentrate of the oxidations such as calcite, quartz and silicate mineral accounting less than 21.5%.According to this
One specific embodiment of invention, phosphorus concentrate flotation may include that one roughing, once purging selection and four times are selected.It can obtain as a result,
It is greater than 33% phosphorus concentrate to phosphorus pentoxide content, the rate of recovery of phosphorus pentoxide is greater than 80%.
Still another embodiment in accordance with the present invention, sulphur flotation tailing and regulator, the second collecting agent, inhibitor mass ratio
It can be 10000:1.2~1.8:1.5~1.8:2~2.4.Inventors have found that sulphur flotation tailing and regulator, the second collecting
Agent, inhibitor mass ratio do not answer too high or too low, wherein regulator and when excessively high inhibitor, significantly affects swimming for Phosphate minerals
Performance reduces the rate of recovery of Phosphate minerals, too low, and sufficient adjustment effect can not be had to ore pulp, it is difficult to sufficiently expansion Phosphate minerals
With the difference of surface nature between gangue mineral；The excessively high quality that can significantly reduce phosphorus concentrate of second collecting agent, it is too low also to make
Decline at the rate of recovery of Phosphate minerals.
According to still another embodiment of the invention, regulator can be at least one of sodium carbonate, sodium bicarbonate.Invention
People's discovery, the advantage of above-mentioned regulator can effectively adjust slurry pH, and eliminate calcium ion excessive in ore pulp, magnesium ion
It influences.
According to still another embodiment of the invention, the second collecting agent can be in oxidized paraffin wax soap class or oleic-acid collecting agent
At least one of.Inventors have found that above-mentioned second collecting agent can effective collecting Phosphate minerals.
According to still another embodiment of the invention, inhibitor can be at least one of waterglass, acidified sodium silicate.Hair
Bright people's discovery, above-mentioned inhibitor have significant inhibiting effect to gangue minerals such as silicates under suitable amounts.
According to an embodiment of the invention, there is low intensity magnetic separation unit 400 phosphorus flotation tailing entrance 401, iron ore concentrate to export 402 and
Tailing outlet 403, phosphorus flotation tailing entrance 401 are connected with phosphorus flotation tailing outlet 306, and are suitable for carrying out phosphorus flotation tailing weak
Magnetic separation, to obtain iron ore concentrate and tailing.Specifically, phosphorus flotation tailing is carried out magnetic separation under the action of low-intensity magnetic field, phosphorus is recycled
The iron ore concentrate that TFe content is greater than 65% can be obtained in magnetic iron ore in flotation tailing, and the rate of recovery of MFe (Armco magnetic iron) is greater than 95%,
And the sulfur content in gained iron ore concentrate, less than 0.3%, P content is less than 0.15%, compared with existing Ultra-low-grade magnetite ore-dressing technique,
With significant effect.
According to one embodiment of present invention, low intensity magnetic separation unit 400 includes iron ore concentrate roughing device 410, fine grinding device 420
With iron ore concentrate selecting device 430.It should be noted that iron ore concentrate roughing device and iron ore concentrate selecting device are not limited especially
System, those skilled in the art can select according to actual needs, such as can be adverse current type, downstream-type, half adverse current type
Magnetic separator.A specific embodiment according to the present invention, low intensity magnetic separation may include one roughing, a fine grinding and primary cleaning.
Roughing is carried out under the magnetic field strength of 219-159kA/m specifically, first sending phosphorus flotation tailing to iron ore concentrate roughing device, is obtained
Iron roughing mine and iron rougher tailings, then the iron roughing mine is sent to fine grinding device and carries out fine grinding, partial size is finely ground to less than 0.074mm
Accounting be greater than 80%, then by the iron roughing mine after fine grinding send to iron ore concentrate selecting device 76-116kA/m magnetic field strength
Lower progress is selected, obtains iron ore concentrate and iron cleaner tailings, wherein the sum of iron rougher tailings and iron cleaner tailings are above-mentioned tail
Mine.The iron ore concentrate that TFe content is greater than 65% can be obtained as a result, the rate of recovery of MFe (Armco magnetic iron) is greater than 95%, and gained iron essence
Sulfur content in mine is less than 0.3%, and P content is less than 0.15%, compared with existing Ultra-low-grade magnetite ore-dressing technique, has significant
Effect.Inventors have found that in iron ore concentrate roughing and refining process, the excessively high drop that will cause concentrate product iron content of magnetic field strength
It is low, it is unfavorable for obtaining qualified concentrate product；The too low reduction that will cause the ferro element rate of recovery in concentrate product of magnetic field strength, no
Conducive to the ideal metal recovery rate of acquisition.
The system of processing Ultra-low-grade magnetite according to an embodiment of the present invention, by floating Ultra-low-grade magnetite progress iron concentrate
Choosing, can be obtained the iron concentrate that sulfur content is greater than 40%, and sulfur recovery rate is greater than 70%；By the way that sulphur flotation tailing progress phosphorus concentrate is floated
Choosing, can be obtained the phosphorus concentrate that phosphorus pentoxide content is greater than 33%, and the rate of recovery of phosphorus pentoxide is greater than 80%；By the way that phosphorus is floated
It selects tailing to carry out low intensity magnetic separation, the iron ore concentrate that TFe content is greater than 65% can be obtained, the rate of recovery of MFe Armco magnetic iron is greater than 95%, and iron
Sulfur content is lower than 0.3% in concentrate, and phosphorus content is lower than 0.15%.Hereby it is achieved that valuable group of iron, sulphur, phosphorus in Ultra-low-grade magnetite
The synthetical recovery divided, significantly improves the ore-dressing technique of existing Ultra-low-grade magnetite.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment
The chemical composition analysis of Ultra-low-grade magnetite is as shown in table 1.
A kind of chemical composition analysis of the Ultra-low-grade magnetite of table 1
| Chemical component | TFe | mFe | Ti | P2O5 | S | Na2O |
| Content % | 15.87 | 6.46 | 1.51 | 2.17 | 0.40 | 1.73 |
| Chemical component | Al2O3 | CaO | MgO | SiO2 | K2O | |
| Content % | 10.99 | 13.29 | 10.03 | 34.5 | 1.08 |
Above-mentioned Ultra-low-grade magnetite is subjected to wet ground, the partial size for obtaining ore pulp Minerals is less than the accounting of 0.074mm
50%-55%, mass concentration be 30%~40% ore pulp, then at normal temperature, using amyl group xanthate as the first collecting agent,
2# oil carries out flotation to iron sulfide minerals such as pyrite, magnetic iron ore in ore pulp as foaming agent, specifically, in which: roughing
Operation obtains sulphur rough concentrate and rougher tailings, and the medicament used is the first collecting agent and foaming agent, roughing pulp and penta xanthate, 2#
The mass ratio of oil can be respectively 100000:1.5,100000:1.5；The sulphur rough concentrate that roughing operation obtains feeds selected work
Medicament is not added in industry, selected operation, and selected one tailing return feeds roughing operation, and selected one concentrate feeds selected two, essence
It selecting two tailing to return and feeds selected one, selected two concentrate feeds selected three, and the concentrate of essence three is iron concentrate, selected three
Tailing return feeds selected two；The rougher tailings that roughing operation obtains, which is fed, scans operation, strengthens the collecting of iron sulfide mineral, makes
Medicament is penta xanthate and 2# oil, scan ore pulp and penta xanthate and 2# oil mass ratio can be respectively 100000:0.5,
100000:0.5, it is featured and scan, respectively obtain iron concentrate and sulphur flotation tailing that sulfur content is 43.1wt%, whole process
In, the rate of recovery of sulphur is 75%；Then at normal temperature, using sodium carbonate as regulator, enuatrol as the second collecting agent, water
Glass recycles the Phosphate minerals such as apatite in sulphur flotation tailing as inhibitor, specifically, to obtain phosphorus thick for roughing operation
Concentrate and rougher tailings, the medicament used are sodium carbonate, enuatrol and waterglass, roughing pulp and sodium carbonate, enuatrol and water
The mass ratio of glass is respectively 10000:1.5,10000:1.1,10000:1；The phosphorus rough concentrate that roughing operation obtains feeds selected
Operation selected operation totally four times, adds inhibitor respectively, wherein selected one tailing, which returns, feeds roughing operation, selected one
Concentrate feeds selected two, and selected two tailing return feeds selected one, and selected two concentrate feeds selected three, and the concentrate of essence three is given
Enter selected four, the tailing of selected operation successively feeds last selected operation, the mass ratio of selected operation ore pulp and inhibitor by
Selected one to selected four is followed successively by 10000:0.37,10000:0.25,10000:0.25,10000:0.13；Roughing operation obtains
Phosphorus rougher tailings feed once purging selection operation, strengthen the collecting of Phosphate minerals, the medicament used be enuatrol, scan ore pulp and oil
The mass ratio of sour sodium is 10000:0.5, featured and after scanning, and respectively obtains the phosphorus that phosphorus pentoxide content is 34.65wt%
Concentrate and phosphorus flotation tailing, in whole process, the rate of recovery of phosphorus pentoxide is 85.38%；Finally by above-mentioned phosphorus flotation tailing
Roughing is carried out under the magnetic field strength of 219-159kA/m, obtains iron roughing mine and iron rougher tailings, then the iron roughing mine is carried out
Fine grinding is finely ground to the accounting 80% that partial size is less than 0.074mm, then by the iron roughing mine after fine grinding in the magnetic field of 76-116kA/m
It carries out selected under intensity, obtains iron ore concentrate and iron cleaner tailings, wherein the sum of iron rougher tailings and iron cleaner tailings are as above-mentioned
Tailing.The iron ore concentrate that TFe content is 65.58wt% can be obtained as a result, the rate of recovery of MFe (Armco magnetic iron) is 95.55%, and institute
The sulfur content obtained in iron ore concentrate is 0.2wt%, P content 0.084wt%, compared with existing Ultra-low-grade magnetite ore-dressing technique, tool
There is significant effect.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (7)
1. a kind of method for handling Ultra-low-grade magnetite characterized by comprising
(1) Ultra-low-grade magnetite is subjected to wet ground, to obtain ore pulp；
(2) ore pulp is mixed with the first collecting agent, foaming agent and carries out iron concentrate flotation, to obtain iron concentrate and sulphur flotation
Tailing；
(3) the sulphur flotation tailing and regulator, the second collecting agent, inhibitor mixed are subjected to phosphorus concentrate flotation, to obtain
Phosphorus concentrate and phosphorus flotation tailing；
(4) the phosphorus flotation tailing is subjected to low intensity magnetic separation, to obtain iron ore concentrate and tailing.
2. the method according to claim 1, wherein in step (2), the ore pulp and first collecting
Agent, the foaming agent mass ratio be 100000:3~2:2~2.5.
3. the method according to claim 1, wherein in step (3), the phosphorus concentrate flotation include roughing,
Scan with it is selected.
4. method according to claim 1 or 3, which is characterized in that in step (3), the sulphur flotation tailing with it is described
Regulator, second collecting agent, the inhibitor mass ratio be 10000:1.2~1.8:1.5~1.8:2~2.4.
5. the method according to claim 1, wherein the low intensity magnetic separation includes roughing, fine grinding in step (4)
With it is selected.
6. according to the method described in claim 5, it is characterized in that, the magnetic separation strength of the roughing is 219- in step (4)
159kA/m。
7. according to the method described in claim 6, it is characterized in that, the selected magnetic field strength is 76- in step (4)
116kA/m。
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| CN114226072A (en) * | 2021-12-10 | 2022-03-25 | 临沂会宝岭铁矿有限公司 | Electromagnetic elutriation desulfurization method and system for fine iron powder |
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