CN107983541B - A method of strengthening Hematite selective flocculation - Google Patents
A method of strengthening Hematite selective flocculation Download PDFInfo
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- CN107983541B CN107983541B CN201711364165.7A CN201711364165A CN107983541B CN 107983541 B CN107983541 B CN 107983541B CN 201711364165 A CN201711364165 A CN 201711364165A CN 107983541 B CN107983541 B CN 107983541B
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- bloodstone
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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
- B03D3/00—Differential sedimentation
- B03D3/06—Flocculation
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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
- B03D2201/002—Coagulants and Flocculants
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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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of method for strengthening Hematite selective flocculation, the first step first carries out dry method ore grinding to bloodstone, controls its degree of dissociation；The mineral met the requirements after dissociation are placed in the adjustable magnetic field of magnetic field strength by second step to carry out changing its magnetic and surface nature to hard magnetization by weak；Third step prepares high activity flocculant；Magnetized bloodstone is prepared solution and flocculated in same cavity with dispersing agent, high activity flocculant by the 4th step；Flocculation starts to stir all particles of ore pulp by agitating shaft, regulate and control external rotating excitation field later and secondary agitation further is carried out to bloodstone particle swarm, keep purpose particle fully dispersed and effective floc sedimentation settles, pass through the implementation of this four steps key reinforcement technique means, quality, stability, the intensity of bloodstone subparticle floc sedimentation are guaranteed, and lay the foundation for next step flotation.
Description
Technical field
It is specifically a kind of strong the present invention relates to ore-dressing technique field, the especially method of Hematite efficient flocculating
Change the method for Hematite selective flocculation.
Background technique
Bloodstone is larger in china natural resources reserves, accounts for about the 2/3 of iron ore deposit, but rich ore and easily sorting resource are few, fine
Grain bloodstone, oolitic hematite, speculum iron, the typical complexes difficulty such as limonite using resource China's gross reserves up to 20,000,000,000 t with
On, the features such as these iron ore deposits are difficult to be used directly as steel-making iron-smelting raw material, and iron ore is poor thin miscellaneous, is more obvious, often
Rule technique of preparing is difficult to obtain ideal technical-economic index, causes heavy industrialization difficulty high, therefore, researches and develops efficiently innovation
Hematite separation technology be to realize the task of top priority that utilizes of China's Hematite separation.
Flotation be handle fine-particle minerals a kind of common beneficiation method, but this method need to seek suitable flotation granularity and
Floatability, however the accumulation of the granularity of Hematite is below greatly flotation lower limit, subparticle large specific surface area, surface energy
Height, surface charge are high, and reagent consumption amount is big when sorting, and sorting mineral low efficiency, conventional method for floating is difficult to effectively sort.Together
When, clay mineral content is high in Hematite, is easily attached to bloodstone particle surface, increases sorting difficulty.
Currently, processing method common for Hematite be reached by the modified bloodstone of flocculation technique it is floating
Choosing requires, and there are following characteristics in technology development process: 1. using selection of polymeric flocculants reunion target minreal, forms suitable wadding
Group, reduces that granularity is meticulous influences caused by flotation；2. using either physically or chemically making particle in ore pulp be in stable and uniform
Dispersity；3. flocculated effect directly affects the indices of mineral after flotation, in order to guarantee the effect of floc sedimentation, need to be added
A large amount of flocculants, poor selectivity when causing to flocculate also easily cause the pollution of environment, and addition flocculant influences when less, and floc sedimentation is strong
It is poor to spend, and easily scatters, part bloodstone can not effectively reunite.
In summary problem, the present invention urgently devise a kind of method for strengthening Hematite selective flocculation, with
Bloodstone flocculating effect is improved, is had laid a good foundation for next step hematite flotation.
Summary of the invention
The invention aims to solve the deficiencies in the prior art, a kind of reinforcing Hematite selection is provided
The flocculated method of property.
In order to achieve the above objectives, the present invention is implemented according to following technical scheme:
A method of strengthening Hematite selective flocculation, the first step first carries out dry method ore grinding, control to bloodstone
Make its degree of dissociation；The mineral met the requirements after dissociation are placed in the adjustable magnetic field of magnetic field strength and carry out by weak to strong by second step
Magnetization changes its magnetic and surface nature；Third step prepares high activity flocculant；Magnetized bloodstone is prepared solution by the 4th step
And it flocculates in same cavity with dispersing agent, high activity flocculant；Flocculation start by agitating shaft to all particles of ore pulp into
Row agitation regulates and controls external rotating excitation field later and further carries out secondary agitation to bloodstone particle swarm, divides purpose particle sufficiently
It dissipates and effectively floc sedimentation sedimentation, it is the quality of bloodstone subparticle floc sedimentation, steady by the implementation of this four steps key reinforcement technique means
Qualitative, intensity is guaranteed, and lays the foundation for next step flotation, the specific steps are as follows:
Step 1: bloodstone is put into progress dry method ore grinding in ball mill, the control ore grinding time in 15-120min, is chosen
Bloodstone particle after ore grinding of the degree of dissociation of bloodstone monomer between 70%-80%, it is spare；
Step 2: taking the bloodstone particle after the dissociation chosen in step 1 to be placed on magnetic field strength is 1500Gs-
Magnetize 3-18h in the permanent magnetic field of 13000Gs, chooses particle agglomeration and the good bloodstone particle of wetability, it is spare；
Step 3: choosing grade > 50% after flyash magnetic separation, the concentrate of magnetisable material content > 90% forms sediment with causticization corn
One of powder, sodium carboxymethylcellulose, polyacrylamide high polymer coagulant is uniformly mixed, and is prepared into high activity flocculant；
Step 4: the bloodstone particle after magnetizing in step 2 and water mixing preparation to be added in ore pulp and divide at ore pulp
Being put into stirring, the axis revolving speed for controlling agitating device in agitating device in powder and step 3 after high activity flocculant obtained is
600r/min stirs 1-2min；The rotating excitation field that magnetic field strength is 0.1-0.4T is set outside agitating device, is then turned on rotation
Turn magnetic field, the rotation speed control of rotating excitation field is 200-300r/min, stirs 2-3min, and magnetized bloodstone particle swarm will be by
It is used as high speed rotation and the floc sedimentation constantly under the effect of catching of the net of high activity flocculant to Double stirring work；Stirring dress is closed later
It sets, rotating excitation field, standing sedimentation 3-5min, collects floc sedimentation, enter flotation flowsheet after characterization.
To make Fe in bloodstone2O3It is separated as far as possible with other clay mineral, to the granularity of bloodstone particle after ore grinding and red
The degree of dissociation of iron ores particle is characterized；If pursued high degree of dissociation simply, then overground phenomenon certainly will be will cause, granularity is meticulous
Also it is unfavorable for later period flocculation, a kind of preferred embodiment as above-mentioned technical proposal, the control ore grinding time is in 60- in the step 1
90min。
A kind of preferred embodiment as above-mentioned technical proposal, the magnetic field strength of permanent magnetic field is in the step 2
8000Gs, magnetizing time 12h.
A kind of preferred embodiment as above-mentioned technical proposal, the bloodstone particle after magnetizing in the step 4 are mixed with water
It is deployed into the ore pulp that concentration is 5% afterwards, the efficient flocculant of 2mg/l and the dispersing agent of 40mg/l are added in ore pulp.
A kind of preferred embodiment as above-mentioned technical proposal, the magnetic field strength of rotating excitation field is 0.4T in the step 4,
Rotation speed is 250r/min.
A kind of preferred embodiment as above-mentioned technical proposal, after high activity flocculant is by flyash magnetic separation in the step 3
Grade > 50%, the concentrate of magnetisable material content > 90% and polyacrylamide be made, wherein polyacrylamide and flyash magnetic separation
The weight ratio of the concentrate of grade > 50%, magnetisable material content > 90% afterwards is 80mg/g.
A kind of preferred embodiment as above-mentioned technical proposal is the ore pulp for collecting the ore pulp after sedimentation in the step 4
Floc sedimentation at 35% under liquid level.
A kind of preferred embodiment as above-mentioned technical proposal, the dispersing agent are calgon.
A kind of method for strengthening Hematite selective flocculation of the present invention, in conjunction with the existing flocculation process of bloodstone,
The embedded crucial reinforcement technique means of involvement flocculation, are completed to the preparation before the efficient flotation separation of Hematite.With it is existing
There is technology to compare, with following beneficial outcomes:
1, the selection of granularity is not to pursue to meet maximum degree of dissociation simply, but take into account before flocculating described in the present invention
The granularity simultaneously compound best magnetic efficiency reaches required granularity requirements.
2, high activity flocculant is synthesized with polyacrylamide using flyash high intensity magnetic separation concentrate and occur in magnetic field environment
To the effect of catching of the net of bloodstone, flocculating polymer, magnetic kind and bloodstone coupling which can be provided using composite flocculation agent
The double effects of conjunction improve floc sedimentation quality, guarantee Floc strength.
3, by outside agitating device plus rotary steerable low-intensity magnetic field so that bloodstone particle swarm in rotation ore pulp again by
Magnetic stirring action, the effect in the comprehensive field of force will be so that Fe in bloodstone2O3Efficiently reunite and combines.
4, the control of degree of dissociation, magnetization modification, the addition of high activity flocculant, this red iron of four steps of external rotary steerable magnetic field
The crucial reinforcement technique means of mine flocculation, it is all linked with one another, it is closely coupled, it is indispensable, pass through the reinforcement technique means of this four step, wadding
Solidifying effect greatly improves, and haves laid a good foundation to flotation.
Detailed description of the invention
Fig. 1 is method route figure of the invention.
Fig. 2 is that the present invention uses intensifying method to the flocculated specific implementation process figure of somewhere bloodstone.
Specific embodiment
The invention will be further described combined with specific embodiments below, in the illustrative examples and explanation of the invention
For explaining the present invention, but it is not as a limitation of the invention.
Embodiment 1
As shown in Figure 1, being method route figure of the invention, a kind of reinforcing Hematite of the present embodiment is selectively wadded a quilt with cotton
Solidifying method, the specific steps are as follows:
Step 1: bloodstone is put into progress dry method ore grinding in ball mill, make Fe in bloodstone2O3With other clay mines
Object separates as far as possible, characterizes to the granularity of bloodstone particle after ore grinding and the degree of dissociation of bloodstone particle；It is as high in pursued simply
Degree of dissociation, then overground phenomenon certainly will be will cause, granularity is meticulous to be also unfavorable for later period flocculation, controls the ore grinding time in 60-
90min, the bloodstone particle after choosing ore grinding of the degree of dissociation of bloodstone monomer between 70%-80%, spare, bloodstone particle
The ratio of middle monomer and intergrowth is suitable, not only contributes to the implementation of magnetization technology, and guarantee floc sedimentation quality to a certain degree；
Step 2: take the bloodstone particle after the dissociation chosen in step 1 be placed on magnetic field strength be 13000Gs forever
Magnetize 3h in magnetic magnetic field, changes fine mineral particle surface nature, so that its surface charge, magnetic property, wetability etc. is changed, by magnetic
Occur cluster pattern between the particle of change, chooses particle agglomeration and the good bloodstone particle of wetability, it is spare；
Step 3: choosing grade > 50% after flyash magnetic separation, the concentrate of magnetisable material content > 90% forms sediment with causticization corn
Powder is uniformly mixed, and is prepared into high activity flocculant, wherein causticization cornstarch and grade > 50%, the magnetic material after flyash magnetic separation
The weight ratio of the concentrate of matter content > 90% is 80mg/g；
Step 4: the ore pulp for being 5% at concentration by the bloodstone particle after magnetizing in step 2 and water mixing preparation, in mine
The high activity flocculant of 2mg/l and the calgon of 40mg/l are added in slurry, dispersing agent and step 3 are added in ore pulp
In be put into stirring in agitating device after high activity flocculant obtained, the axis revolving speed for controlling agitating device is 600r/min, stirring
1min；The rotating excitation field that magnetic field strength is 0.1T is set outside agitating device, is then turned on rotating excitation field, the rotation of rotating excitation field
Rotary speed control is 200r/min, stirs 2min, magnetized bloodstone particle swarm will be made to be used as by Double stirring high speed rotation,
And the floc sedimentation constantly under the effect of catching of the net of high activity flocculant；Closing agitating device, rotating excitation field later, standing sedimentation 3min,
Floc sedimentation at 35% under the mineral syrup liquid of ore pulp after sedimentation enters the conventional flotation process of next step after characterization.
Embodiment 2
As shown in Figure 1, being method route figure of the invention, a kind of reinforcing Hematite of the present embodiment is selectively wadded a quilt with cotton
Solidifying method, the specific steps are as follows:
Step 1: bloodstone is put into progress dry method ore grinding in ball mill, make Fe in bloodstone2O3With other clay mines
Object separates as far as possible, characterizes to the granularity of bloodstone particle after ore grinding and the degree of dissociation of bloodstone particle；It is as high in pursued simply
Degree of dissociation, then overground phenomenon certainly will be will cause, granularity is meticulous to be also unfavorable for later period flocculation, controls the ore grinding time in 60-
90min, the bloodstone particle after choosing ore grinding of the degree of dissociation of bloodstone monomer between 70%-80%, spare, bloodstone particle
The ratio of middle monomer and intergrowth is suitable, not only contributes to the implementation of magnetization technology, and guarantee floc sedimentation quality to a certain degree；
Step 2: the bloodstone particle after the dissociation chosen in step 1 is taken to be placed on the permanent magnetism that magnetic field strength is 1500Gs
Magnetize 18h in magnetic field, changes fine mineral particle surface nature, so that its surface charge, magnetic property, wetability etc. is changed, by magnetic
Occur cluster pattern between the particle of change, chooses particle agglomeration and the good bloodstone particle of wetability, it is spare；
Step 3: choosing grade > 50% after flyash magnetic separation, the concentrate of magnetisable material content > 90%, with carboxymethyl cellulose
Plain sodium is uniformly mixed, and is prepared into high activity flocculant, wherein sodium carboxymethylcellulose and grade > 50%, the magnetic after flyash magnetic separation
Property content of material > 90% concentrate weight ratio be 80mg/g；
Step 4: the ore pulp for being 5% at concentration by the bloodstone particle after magnetizing in step 2 and water mixing preparation, in mine
The high activity flocculant of 2mg/l and the calgon of 40mg/l are added in slurry, dispersing agent and step 3 are added in ore pulp
In be put into stirring in agitating device after high activity flocculant obtained, the axis revolving speed for controlling agitating device is 600r/min, stirring
2min；The rotating excitation field that magnetic field strength is 0.4T is set outside agitating device, is then turned on rotating excitation field, the rotation of rotating excitation field
Rotary speed control is 300r/min, stirs 3min, magnetized bloodstone particle swarm will be made to be used as by Double stirring high speed rotation,
And the floc sedimentation constantly under the effect of catching of the net of high activity flocculant；Closing agitating device, rotating excitation field later, standing sedimentation 5min,
Floc sedimentation at 35% under the mineral syrup liquid of ore pulp after sedimentation enters the conventional flotation process of next step after characterization.
Embodiment 3
As shown in Figure 1, being method route figure of the invention, a kind of reinforcing Hematite of the present embodiment is selectively wadded a quilt with cotton
Solidifying method, the specific steps are as follows:
Step 1: bloodstone is put into progress dry method ore grinding in ball mill, make Fe in bloodstone2O3With other clay mines
Object separates as far as possible, characterizes to the granularity of bloodstone particle after ore grinding and the degree of dissociation of bloodstone particle；It is as high in pursued simply
Degree of dissociation, then overground phenomenon certainly will be will cause, granularity is meticulous to be also unfavorable for later period flocculation, controls the ore grinding time in 60-
90min, the bloodstone particle after choosing ore grinding of the degree of dissociation of bloodstone monomer between 70%-80%, spare, bloodstone particle
The ratio of middle monomer and intergrowth is suitable, not only contributes to the implementation of magnetization technology, and guarantee floc sedimentation quality to a certain degree；
Step 2: the bloodstone particle after the dissociation chosen in step 1 is taken to be placed on the permanent magnetism that magnetic field strength is 8000Gs
Magnetize 12h in magnetic field, changes fine mineral particle surface nature, so that its surface charge, magnetic property, wetability etc. is changed, by magnetic
Occur cluster pattern between the particle of change, chooses particle agglomeration and the good bloodstone particle of wetability, it is spare；
Step 3: choosing grade > 50% after flyash magnetic separation, the concentrate of magnetisable material content > 90%, with polyacrylamide
It is uniformly mixed, is prepared into high activity flocculant, wherein polyacrylamide contains with grade > 50%, the magnetisable material after flyash magnetic separation
The weight ratio of the concentrate of amount > 90% is 80mg/g；
Step 4: the ore pulp for being 5% at concentration by the bloodstone particle after magnetizing in step 2 and water mixing preparation, in mine
The high activity flocculant of 2mg/l and the calgon of 40mg/l are added in slurry, dispersing agent and step 3 are added in ore pulp
In be put into stirring in agitating device after high activity flocculant obtained, the axis revolving speed for controlling agitating device is 600r/min, stirring
1min；The rotating excitation field that magnetic field strength is 0.4T is set outside agitating device, is then turned on rotating excitation field, the rotation of rotating excitation field
Rotary speed control is 250r/min, stirs 2min, magnetized bloodstone particle swarm will be made to be used as by Double stirring high speed rotation,
And the floc sedimentation constantly under the effect of catching of the net of high activity flocculant；Closing agitating device, rotating excitation field later, standing sedimentation 3min,
Floc sedimentation at 35% under the mineral syrup liquid of ore pulp after sedimentation enters the conventional flotation process of next step after characterization.
It can be described as further combined with Fig. 2 for the flocculated reinforcing detailed process of somewhere oolitic hematite:
Step 1: oolitic hematite is put into progress dry method ore grinding in ball mill, make Fe in oolitic hematite2O3With other
Clay mineral separate as far as possible, carry out table to the granularity of oolitic hematite particle after ore grinding and the degree of dissociation of oolitic hematite particle
Sign；If pursued high degree of dissociation simply, then overground phenomenon certainly will be will cause, granularity is meticulous to be also unfavorable for later period flocculation, control
Roe shape red iron of the ore grinding time in 60-90min, after choosing ore grinding of the degree of dissociation of oolitic hematite monomer between 70%-80%
Mine particle, it is spare；
Step 2: taking the oolitic hematite particle after the dissociation chosen in step 1 to be placed on magnetic field strength is 8000Gs's
Magnetize 12h in permanent magnetic field, change fine mineral particle surface nature, its surface charge, magnetic property, wetability etc. is made to change,
Occur cluster pattern between the particle being magnetized, chooses particle agglomeration and the good oolitic hematite particle of wetability, it is spare；
Step 3: choosing grade > 50% after flyash magnetic separation, the concentrate of magnetisable material content > 90%, with polyacrylamide
It is uniformly mixed, is prepared into high activity flocculant, wherein polyacrylamide contains with grade > 50%, the magnetisable material after flyash magnetic separation
The weight ratio of the concentrate of amount > 90% is 80mg/g；
Step 4: the ore pulp for being 5% at concentration by the oolitic hematite particle after magnetizing in step 2 and water mixing preparation,
The high activity flocculant of 2mg/l and the calgon of 40mg/l are added in ore pulp, dispersing agent and step are added in ore pulp
Stirring in agitating device is put into rapid three after high activity flocculant obtained, the axis revolving speed for controlling agitating device is 600r/min,
Stir 1min；The rotating excitation field that magnetic field strength is 0.4T is set outside agitating device, is then turned on rotating excitation field, rotating excitation field
Rotation speed control be 250r/min, stir 2min, magnetized oolitic hematite particle swarm will make to be used as by Double stirring
High speed rotation and the floc sedimentation constantly under the effect of catching of the net of high activity flocculant；Agitating device, rotating excitation field are closed later, are stood
Settle 3min, 35% under the mineral syrup liquid of the ore pulp after sedimentation at floc sedimentation, the conventional flotation process of next step is entered after characterization.
The limitation that technical solution of the present invention is not limited to the above specific embodiments, it is all to do according to the technique and scheme of the present invention
Technology deformation out, falls within the scope of protection of the present invention.
Claims (7)
1. a kind of method for strengthening Hematite selective flocculation, which comprises the following steps:
Step 1: bloodstone is put into progress dry method ore grinding in ball mill, the ore grinding time is controlled in 15-120min, chooses red iron
Bloodstone particle after ore grinding of the degree of dissociation of mine monomer between 70%-80%, it is spare；
Step 2: taking the bloodstone particle after the dissociation chosen in step 1 to be placed on magnetic field strength is 1500Gs-13000Gs's
Magnetize 3-18h in permanent magnetic field, chooses particle agglomeration and the good bloodstone particle of wetability, it is spare；
Step 3: choose flyash magnetic separation after grade > 50%, the concentrate of magnetisable material content > 90%, with causticization cornstarch,
One of sodium carboxymethylcellulose, polyacrylamide high polymer coagulant is uniformly mixed, and is prepared into high activity flocculant；
Step 4: the ore pulp for being 5% at concentration by the bloodstone particle after magnetizing in step 2 and water mixing preparation, in ore pulp
It is added in the dispersing agent and step 3 of 40mg/l after the high activity flocculant of 2mg/l obtained and is put into stirring in agitating device, control
The axis revolving speed of agitating device processed is 600r/min, stirs 1-2min；It is 0.1-0.4T that magnetic field strength is arranged outside agitating device
Rotating excitation field, be then turned on rotating excitation field, the rotation speed control of rotating excitation field is 200-300r/min, stirs 2-3min；
Agitating device, rotating excitation field are closed later, and standing sedimentation 3-5min collects floc sedimentation, enters flotation flowsheet after characterization.
2. the method according to claim 1 for strengthening Hematite selective flocculation, it is characterised in that: the step
The ore grinding time is controlled in one in 60-90min.
3. the method according to claim 1 for strengthening Hematite selective flocculation, it is characterised in that: the step
The magnetic field strength of permanent magnetic field is 8000Gs, magnetizing time 12h in two.
4. the method according to claim 1 for strengthening Hematite selective flocculation, it is characterised in that: the step
The magnetic field strength of rotating excitation field is 0.4T, rotation speed 250r/min in four.
5. the method according to claim 1 for strengthening Hematite selective flocculation, it is characterised in that: the step
It is the floc sedimentation under the mineral syrup liquid for collecting the ore pulp after sedimentation at 35% in four.
6. the method according to claim 1 for strengthening Hematite selective flocculation, it is characterised in that: the step
High activity flocculant is by grade > 50% after flyash magnetic separation, the concentrate and polyacrylamide system of magnetisable material content > 90% in three
, wherein the weight ratio of polyacrylamide and the concentrate of grade > 50%, magnetisable material content > 90% after flyash magnetic separation is
80mg/g。
7. the method according to claim 1 or 4 for strengthening Hematite selective flocculation, it is characterised in that: described
Dispersing agent is calgon.
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| CN112156891A (en) * | 2020-07-24 | 2021-01-01 | 广东蓝龙环境科技有限公司 | Method for improving recovery rate of magnetic metal in household garbage incinerator slag |
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