CN106315671B - The system and method for handling chloridising production Titanium dioxide slurry - Google Patents
The system and method for handling chloridising production Titanium dioxide slurry Download PDFInfo
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- CN106315671B CN106315671B CN201610832110.3A CN201610832110A CN106315671B CN 106315671 B CN106315671 B CN 106315671B CN 201610832110 A CN201610832110 A CN 201610832110A CN 106315671 B CN106315671 B CN 106315671B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/07—Producing by vapour phase processes, e.g. halide oxidation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
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Abstract
The invention discloses the system and method for processing chloridising production Titanium dioxide slurry, system includes：Pressure filtration washing device, it has Titanium dioxide slurry entrance, filtered solid outlet and filtrate (liquid；Subsider, it has filtrate inlet, flocculant entrance, supernatant outlet and bottom slurry outlet；Slurry surge tank, it expects that entrance and surge tank discharging opening, surge tank charging aperture are connected with bottom slurry outlet after having surge tank charging aperture, the first coating；Coating tank, there is the first coating slurry inlet, the second coating slurry inlet, outlet, the entrance of storage tank is connected with buffer outlet, and the outlet of storage tank is connected with the entrance of storage tank before press filtration.Storage tank before press filtration, it expects that entrance and outlet, reservoir inlet are connected with surge tank discharging opening after having reservoir inlet, the second coating, and outlet is connected with Titanium dioxide slurry entrance.The rate of recovery of titanium is not only increased using the system, and can realize to the controllable of titanium dioxide product quality and ensure the continuity of production.
Description
Technical field
The invention belongs to metallurgical technology field, and specifically, the present invention relates to one kind processing chloridising production titanium dioxide slurry
The system and method for material.
Background technology
CN 1066043 discloses a kind of process for preparing rutile type titanium white, and it includes：1) by high titanium slag with
Petroleum coke is put into chlorination furnace after uniformly mixing, and is passed through chlorine and fluidizing chlorination is carried out at a temperature of 800~900 DEG C；2) to chlorination
The rough titanium tetrachloride obtained afterwards carries out separating-purifying and removes the impurity such as magnesium, iron, silicon and vanadium, obtains refining titanic chloride；3) will
Obtained refining titanic chloride liquid is converted into gas phase in evaporator, and is preheated to 450~800 DEG C；4) by the chlorination of gas phase four
To oxidation furnace, oxygen heats through plasma generator to be entered for supply after titanium mixes with a small amount of compound modifying agent gas phase alchlor
Oxidation furnace, at a temperature of 1300~1500 DEG C, oxidation reaction generation solid phase titanium dioxide is carried out in less than 0.1 second；5) it is rapid
Titanium dioxide solids powder, which is removed, reaction zone and makes reaction heat remove rapidly, collects titanium dioxide and chlorine, and by chlorine
It is back to chlorination furnace；6) the titanium dioxide granule powder of collection is beaten into liquid, sorted through two-stage, thin less than 1 micron
Grain titanium dioxide is post-processed again, the polished re-grading of obtained coarse granule；7) using auxiliary agent at a temperature of 50~70 DEG C
Coating processing is carried out to fine grained titanium dioxide under the conditions of pH=7~8；8) titanium dioxide slurries after coating is handled carry out two
Secondary filtration washing, charging is aqueous to be less than 45%, and discharging is aqueous to be less than 1%；9) to that will filter twice at a temperature of 120~160 DEG C
Ultramicro grinding is carried out after the filtration cakes torrefaction obtained afterwards, obtains the titanium dioxide product that particle mean size accounts for 70% below 0.3 μm.
But titanium dioxide slurries after handling coating carry out filtration washing process twice produce the turbidity of waste water compared with
Height, the cleaning of filter cloth is more frequent, so the subsider flocculation of process deposited substantial amounts of titanium dioxide after washing, part is not wadded a quilt with cotton
Coagulate complete titanium dioxide and the raw water box of sewage mixing channel, accident groove and saliferous workshop section is entered with waste water, and then mix sewage
Groove, accident groove and raw water box also deposited substantial amounts of titanium dioxide, while intermediate products be carried out in production process of titanium pigment
Detection and analysis, the sample returned after sample presentation analysis detection heap, and have impact on the continuous operation of subsequent production, while the slurry of this part
Material can not recycle, and cause titanium recovery rate low.
Therefore, the technology of existing processing Titanium dioxide slurry is further improved.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
One purpose is to propose a kind of system and method for handling chloridising production Titanium dioxide slurry, not only increased using the system
The rate of recovery of titanium, and can realize to the controllable of titanium dioxide product quality and ensure the continuity of production.
In one aspect of the invention, the present invention proposes a kind of system for handling chloridising production Titanium dioxide slurry.Root
According to embodiments of the invention, the system includes：
Pressure filtration washing device, the pressure filtration washing device have Titanium dioxide slurry entrance, filtered solid outlet and filtrate (liquid, and
Suitable for carrying out pressure filtration washing processing to Titanium dioxide slurry, to obtain filter cake and filtrate；
Subsider, the subsider have filtrate inlet, flocculant entrance, supernatant outlet and bottom slurry outlet, institute
Filtrate inlet is stated with the filtrate (liquid to be connected, and suitable for carrying out the filtrate with flocculant to mix sedimentation, on obtaining
Clear liquid and bottom slurry；
Slurry surge tank, the slurry surge tank expect that entrance and surge tank go out after having surge tank charging aperture, the first coating
Material mouth, the surge tank charging aperture are connected with the bottom slurry outlet, the surge tank discharging opening and the Titanium dioxide slurry
Entrance is connected, and suitable for the bottom slurry is mixed with expecting after the first coating, to obtain mixed slurry, and by described in
Mixed slurry is back to the pressure filtration washing device and carries out the pressure filtration washing processing；
Coating tank, the coating tank expects entrance before having the first coating, expect entrance and the second coating before the second coating after expect
Outlet, and suitable for will material carries out coating processing before material and the second coating before the first coating, to expect after obtaining the second coating；And
Storage tank before press filtration, storage tank expects entrance and outlet, second coating after having the second coating before the press filtration
Expect that entrance is connected with material outlet after second coating afterwards, the outlet is connected with the Titanium dioxide slurry entrance, and suitable
Expect after second coating is stored, and by material supply after the coating into the pressure filtration washing device.
Thus, the system of processing chloridising according to embodiments of the present invention production Titanium dioxide slurry is by the way that chloridising is produced
Filtrate after Titanium dioxide slurry progress pressure filtration washing is supplied into subsider to carry out mixing settlement treatment with flocculant, and uses
Slurries surge tank obtains during being tested and analyzed the bottom slurry obtained in subsider and coating process back segment intermediate products
To sampling returning charge mixed after supply pressure filtration washing processing is carried out into pressure filtration washing device, while by coating process leading portion
Normal production supplied materials in sampling returning charge and coating front-end-of-line that intermediate products obtain during being tested and analyzed is through coating
Pressure filtration washing device is back to after storage tank before press filtration to be handled, can effectively reclaim in subsider and not flocculate completely after processing
Titanium dioxide, so as to the complete titanium dioxide that effectively avoids not flocculating into sewage mixing channel, accident Cao Ji saliferous workshop section
In raw water box, and can solve coating process leading portion and back segment intermediate products tested and analyzed during obtained sampling return
The problem of wastage of material caused by material bulk deposition, and then the rate of recovery of titanium is not only increased, and can realize to titanium white
The continuity that is controllable and ensureing production of powder product quality.
In addition, the system of processing chloridising production Titanium dioxide slurry according to the above embodiment of the present invention can also have such as
Additional technical characteristic down：
In some embodiments of the invention, the system of the processing chloridising production Titanium dioxide slurry further comprises：
First samples material-returning device, expects that entrance is connected with the described first sampling material-returning device after first coating, and described first
Sampling material-returning device is arranged on titanium dioxide coating process back segment.Thus, it is possible to significantly improve the rate of recovery of titanium.
In some embodiments of the invention, the system of the processing chloridising production Titanium dioxide slurry further comprises：
Second sampling material-returning device, the second sampling material-returning device is with expecting that entrance is connected before second coating, second sampling
Material-returning device is arranged on titanium dioxide coating process leading portion.Thus, it is possible to further improve the rate of recovery of titanium.
In some embodiments of the invention, the system of the processing chloridising production Titanium dioxide slurry further comprises：
Equipment for drying is dodged, the sudden strain of a muscle equipment for drying is connected with the filtered solid outlet, and suitable for the filter cake is carried out into flash drying processing, so as to
Obtain titanium dioxide coating particle.
In another aspect of the invention, the present invention proposes a kind of using above-mentioned processing chloridising production Titanium dioxide slurry
System implement processing chloridising production Titanium dioxide slurry method.According to an embodiment of the invention, methods described includes：
Titanium dioxide slurry is supplied into the pressure filtration washing device and carries out pressure filtration washing processing, to obtain filter cake and filter
Liquid；
The filtrate is supplied with flocculant and carries out mixing sedimentation into the subsider, to obtain supernatant and bottom
Slurry；
The bottom slurry is mixed with material supply after the first coating into the slurry surge tank, to be mixed
Slurry is closed, and the mixed slurry is back in the pressure filtration washing device and carries out the pressure filtration washing processing；
Coating processing will be carried out into the coating tank with material supply before the second coating by material before first coating, to obtain the
Expect after two coatings；And
Material supply it will be stored after second coating into storage tank before the press filtration, and before the press filtration will be stored in
Material supply carries out the pressure filtration washing processing into the pressure filtration washing device after the second coating in storage tank.
In addition, the method for processing chloridising production Titanium dioxide slurry according to the above embodiment of the present invention can also have such as
Additional technical characteristic down：
Thus, the method for processing chloridising according to embodiments of the present invention production Titanium dioxide slurry is by the way that chloridising is produced
Filtrate after Titanium dioxide slurry progress pressure filtration washing is supplied into subsider to carry out mixing settlement treatment with flocculant, and uses
Slurries surge tank obtains during being tested and analyzed the bottom slurry obtained in subsider and coating process back segment intermediate products
To sampling returning charge mixed after supply pressure filtration washing processing is carried out into pressure filtration washing device, while by coating process leading portion
Normal production supplied materials in sampling returning charge and coating front-end-of-line that intermediate products obtain during being tested and analyzed is through coating
Pressure filtration washing device is back to after storage tank before press filtration to be handled, can effectively reclaim in subsider and not flocculate completely after processing
Titanium dioxide, so as to the complete titanium dioxide that effectively avoids not flocculating into sewage mixing channel, accident Cao Ji saliferous workshop section
In raw water box, and can solve coating process leading portion and back segment intermediate products tested and analyzed during obtained sampling return
The problem of wastage of material caused by material bulk deposition, and then the rate of recovery of titanium is not only increased, and can realize to titanium white
The continuity that is controllable and ensureing production of powder product quality.
In some embodiments of the invention, expect that the sampling come from coating process back segment is returned after first coating
Material.
In some embodiments of the invention, expect to come from normal production in coating process leading portion before first coating to come
Expect, material comes from the sampling returning charge in coating process leading portion before second coating.Thus, it is possible to significantly improve the recovery of titanium
Rate.
In some embodiments of the invention, the method for the processing chloridising production Titanium dioxide slurry further comprises：
The filter cake is supplied to progress flash drying processing in equipment for drying is dodged, to obtain titanium dioxide coating particle.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the system structure diagram of processing chloridising production Titanium dioxide slurry according to an embodiment of the invention；
Fig. 2 is that the system architecture that Titanium dioxide slurry is produced according to the processing chloridising of further embodiment of the present invention is illustrated
Figure；
Fig. 3 is illustrated according to the system architecture of the processing chloridising production Titanium dioxide slurry of another embodiment of the invention
Figure；
Fig. 4 is illustrated according to the system architecture of the processing chloridising production Titanium dioxide slurry of another embodiment of the invention
Figure；
Fig. 5 is the method flow schematic diagram of processing chloridising production Titanium dioxide slurry according to an embodiment of the invention；
Fig. 6 is that the method flow that Titanium dioxide slurry is produced according to the processing chloridising of further embodiment of the present invention is illustrated
Figure.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In one aspect of the invention, the present invention proposes a kind of system for handling chloridising production Titanium dioxide slurry.Need
It is explained that unless otherwise specified, " chloridising production Titanium dioxide slurry " herein refers in disclosed patent CN 1066043
Coating is handled after titanium dioxide slurries carry out the filtrate obtained twice after filtration washing.
According to an embodiment of the invention, include with reference to figure 1-3, the system：Pressure filtration washing device 100, subsider 200, slurry
Storage tank 500 before material surge tank 300, coating tank 400 and press filtration.
According to an embodiment of the invention, pressure filtration washing device 100 has Titanium dioxide slurry entrance 101, the and of filtered solid outlet 102
Filtrate (liquid 103, and suitable for carrying out pressure filtration washing processing to Titanium dioxide slurry, obtain filter cake and filtrate.It should be noted that this
Art personnel can select according to the concrete operations condition being actually needed to pressure filtration washing.
According to an embodiment of the invention, subsider 200 has filtrate inlet 201, flocculant entrance 202, supernatant outlet
203 and bottom slurry outlet 204, filtrate inlet 201 be connected with filtrate (liquid 103, and suitable for by filtrate obtained above with wadding
Solidifying agent carries out mixing sedimentation, so as to obtain supernatant and bottom slurry.During being somebody's turn to do, contain titanium in filtrate obtained above
White powder, in the presence of flocculant, most titanium dioxide flocculating setting is to sedimentation trench bottom, and along with partly not flocculating
Complete titanium dioxide is also deposited to sedimentation trench bottom, obtains in supernatant containing partial impurities (such as Na2SO4, the impurity such as NaCl)
Supply to brine waste workshop section is handled, and contains the complete and complete two parts that do not flocculate that flocculate in obtained bottom slurry
Titanium dioxide.
According to one embodiment of present invention, filtrate caused by filter press collects the filter in filtrate tank, filtrate tank
Liquid, by being mixed after distribution ring addition flocculant by static mixer, adds aluminum sulfate solution, added upon mixing in conveying
Enter subsider flocculating setting after adding.Flocculant and aluminum sulfate addition can be added by Frequency pump, and addition can basis
Flow of filtrate is adjusted, specifically, the addition of flocculant PAMA is 2.5~30L/m3, aluminum sulfate
Addition is 0.5-5L/m3, thereby may be ensured that final discharge filtrate reaches requirement.Flocculation can select aluminum sulfate, flocculant or
The methods of aluminum sulfate and flocculant mix is flocculated, and preferably flocculant and aluminum sulfate is used in mixed way, and wherein flocculant can be
Aluminum sulfate, aluminium chloride, polyaluminium sulfate, aluminium polychloride, PAMA, anion pp acid, anion gather
At least one of PAA and anion pp acid calcium.Inventor has found, it is notable to be substantially better than other using this method
Improve the flocculating setting effect of titanium dioxide.
It should be noted that the addition of flocculant, aluminum sulfate can use variable frequency pump to add, it can specifically pass through filtrate
Middle titanium white powder content adjusts addition, and the concrete operations that those skilled in the art can settle according to being actually needed to mixing
Condition is selected.
According to an embodiment of the invention, slurry surge tank 300 expects entrance after having surge tank charging aperture 301, the first coating
302 and surge tank discharging opening 303, surge tank charging aperture 301 be connected with bottom slurry outlet 204, surge tank discharging opening 303 and titanium
White powder slurry inlet 101 is connected, and suitable for bottom slurry is mixed with expecting after the first coating, to obtain mixed slurry,
And gained mixed slurry is back to pressure filtration washing device and carries out pressure filtration washing processing.
According to one embodiment of present invention, material can be that the sampling in coating process back segment is returned after the first coating
Material.It is to be understood that unless otherwise specified, " coating process back segment " mentioned in this article can refer to disclosed patent CN
Coating processing is carried out to fine grained titanium dioxide under the conditions of pH=7~8 at a temperature of 50~70 DEG C using auxiliary agent in 1066043
Material is the intermediate products obtained after coating is handled in any process after any process after process, i.e. the first coating, and coating
Returning charge is sampled in process back segment to be detected in production process of titanium pigment to the intermediate products of any process after coating processing
Sample after analysis.According to a particular embodiment of the invention, with reference to figure 2, by material supply after the first coating into slurry surge tank
It is to be carried out by using the first sampling material-returning device 600, expects that entrance 302 and first samples material-returning device 600 after the first coating
It is connected, and the first sampling material-returning device 600 is arranged on titanium dioxide coating process back segment, i.e., by the sampling in coating process back segment
Return collecting is supplied into slurry surge tank 300 after being sampled to first in material-returning device 600 through the first coating material entrance 302.Hair
A person of good sense has found, carries out the bottom slurry obtained in subsider and coating process back segment intermediate products by using slurries surge tank
Supply can be solved in coating process back segment into subsequent handling after the sampling returning charge obtained during detection and analysis is mixed
Between product tested and analyzed during caused by obtained sampling returning charge bulk deposition wastage of material problem, and then not only
The rate of recovery of titanium is improved, and can realize to the controllable of titanium dioxide product quality and ensure the continuity of production.
According to an embodiment of the invention, coating tank 400 expects entrance 401 before having the first coating, expects entrance before the second coating
402 and second outlet of material after coating 403, and suitable for will material carries out coating processing before material and the second coating before the first coating, so as to
Expect after obtaining the second coating.It should be noted that those skilled in the art can be according to being actually needed to used coating agent
Particular type and coating condition selected.
According to one embodiment of present invention, expect to refer to come from coating process leading portion before the first coating normally to produce
Supplied materials, material comes from the sampling returning charge in coating process leading portion before the second coating.It is to be understood that unless otherwise specified, this
" the normally production supplied materials in coating process leading portion " referred in text, which can refer in disclosed patent CN 1066043, uses auxiliary agent
Process slurry before coating treatment process is carried out under the conditions of pH=7~8 at a temperature of 50~70 DEG C to fine grained titanium dioxide；Herein
In " the coating process leading portion " that refers to can refer in disclosed patent CN 1066043 using auxiliary agent at a temperature of 50~70 DEG C
Any process before coating treatment process is carried out under the conditions of pH=7~8 to fine grained titanium dioxide, i.e. material is before the second coating
The intermediate products obtained before coating processing in any process, and it is in titanium white production mistake that returning charge is sampled in coating process leading portion
Sample after being tested and analyzed in journey to the intermediate products of any process of coating before processing.
According to a particular embodiment of the invention, with reference to figure 3, will before the second coating material supply be into coating tank by using
What the second sampling material-returning device 700 was carried out, the second sampling material-returning device 700 is connected with material entrance before the second coating, and second
Sampling material-returning device 700 is arranged on titanium dioxide coating process leading portion, i.e., by the sampling return collecting in coating process leading portion to the
Supplied after in two sampling material-returning devices 700 through the second coating material entrance 402 into coating tank 400.
According to an embodiment of the invention, storage tank 500 expects entrance 501 and outlet 502 after having the second coating before press filtration,
Expect that entrance 501 is connected with material outlet 403 after second coating after second coating, the outlet 502 and the titanium
White powder slurry inlet 101 is connected, and is supplied suitable for expecting after storing second coating, and by material after the coating to the press filtration
In wash mill.Thus, by the sampling returning charge that is obtained during coating process leading portion intermediate products are tested and analyzed and
Normal production supplied materials in coating front-end-of-line is back to pressure filtration washing device after coating is handled after storage tank before follow-up press filtration
Handled, can effectively reclaim the complete titanium dioxide that do not flocculated in subsider, it is complete so as to effectively avoid not flocculating
Titanium dioxide enter sewage mixing channel, accident Cao Ji saliferous workshop section raw water box in, and can solve among coating process leading portion
The problem of wastage of material caused by the sampling returning charge bulk deposition that product obtains during being tested and analyzed, and then not only carry
The high rate of recovery of titanium, and the continuity of production can be realized to the controllable of titanium dioxide product quality and ensure, and this
It need not make larger improvement to original system in the system of processing chloridising production Titanium dioxide slurry in application.
The system of processing chloridising production Titanium dioxide slurry according to embodiments of the present invention by chloridising by producing titanium white
Filtrate after slurry material progress pressure filtration washing is supplied into subsider to carry out mixing settlement treatment with flocculant, and uses slurries
What surge tank obtained during being tested and analyzed the bottom slurry obtained in subsider and coating process back segment intermediate products
Supply carries out pressure filtration washing processing into pressure filtration washing device after sampling returning charge is mixed, while by among coating process leading portion
Normal production supplied materials in sampling returning charge and coating front-end-of-line that product obtains during being tested and analyzed is handled through coating
Handled by pressure filtration washing device is back to after storage tank before press filtration, can effectively reclaim the complete titanium that do not flocculated in subsider
White powder, so as to the complete titanium dioxide that effectively avoids not flocculating into sewage mixing channel, the raw water of accident Cao Ji saliferous workshop section
In case, and can solve coating process leading portion and back segment intermediate products tested and analyzed during obtained sampling returning charge it is big
The problem of wastage of material caused by amount accumulation, and then the rate of recovery of titanium is not only increased, and can realize and titanium dioxide is produced
The continuity that is controllable and ensureing production of quality.
With reference to figure 4, the system of processing chloridising according to embodiments of the present invention production Titanium dioxide slurry further comprises：Dodge
Equipment for drying 800.
According to an embodiment of the invention, dodge equipment for drying 800 with filtered solid outlet 102 to be connected, and be suitable to pressure filtration washing device
In obtained filter cake carry out flash drying processing, so as to obtain titanium dioxide coating particle.It should be noted that ability
Field technique personnel can be selected the concrete operations condition for dodging dry-cure according to being actually needed.
Inventor is had found, the Titanium dioxide slurry and sample for test time in press filteration system filtrate can be realized using the system
The recovery of returning charge and the individual system returning charge of material is received, and can solve the material batch mixing of acceptance or rejection by this system
Phenomenon, while realize that coating material and non-coating material are effectively separated reprocessing, the controllability for also achieving product quality is same
When product quality can effectively be traced, while ensure that the continuous operation of production, while ensure that the quality of product, together
The rate of recovery of Shi Tigao titanium dioxides, while realize the continuity of production.
In the second aspect of the invention, the present invention proposes a kind of using above-mentioned processing chloridising production Titanium dioxide slurry
System implement processing chloridising production Titanium dioxide slurry method.Below with reference to processing chlorinations of the Fig. 5 to the embodiment of the present invention
The method of method production Titanium dioxide slurry is described in detail.According to an embodiment of the invention, this method includes：
S100：Titanium dioxide slurry is supplied into pressure filtration washing device and carries out pressure filtration washing processing
In the step, Titanium dioxide slurry is supplied into pressure filtration washing device and carries out pressure filtration washing processing, so as to
To filter cake and filtrate.It should be noted that " chloridising production Titanium dioxide slurry " is same as above, and those skilled in the art can
To be selected according to the concrete operations condition being actually needed to pressure filtration washing.
S200：Filtrate is supplied into subsider with flocculant and carries out mixing sedimentation
In the step, filtrate obtained above is supplied into subsider with flocculant and carries out mixing sedimentation, so as to
Obtain supernatant and bottom slurry.During being somebody's turn to do, contain titanium dioxide in filtrate obtained above, in the presence of flocculant, greatly
Partial titanium dioxide flocculating setting is also deposited to sedimentation to sedimentation trench bottom along with the complete titanium dioxide that partly do not flocculate
Trench bottom, obtain in supernatant containing partial impurities (such as Na2SO4, the impurity such as NaCl) at supply to brine waste workshop section
Reason, and contain the complete and complete two parts titanium dioxide that do not flocculate that flocculates in obtained bottom slurry.
According to one embodiment of present invention, filtrate caused by filter press collects the filter in filtrate tank, filtrate tank
Liquid, by being mixed after distribution ring addition flocculant by static mixer, adds aluminum sulfate solution, added upon mixing in conveying
Enter subsider flocculating setting after adding.Flocculant and aluminum sulfate addition can be added by Frequency pump, and addition can basis
Flow of filtrate is adjusted, specifically, the addition of flocculant PAMA is 2.5~30L/m3, aluminum sulfate
Addition is 0.5-5L/m3, thereby may be ensured that final discharge filtrate reaches requirement.Flocculation can select aluminum sulfate, flocculant or
The methods of aluminum sulfate and flocculant mix is flocculated, and preferably flocculant and aluminum sulfate is used in mixed way, and wherein flocculant can be
Aluminum sulfate, aluminium chloride, polyaluminium sulfate, aluminium polychloride, PAMA, anion pp acid, anion gather
At least one of PAA and anion pp acid calcium.Inventor has found, it is notable to be substantially better than other using this method
Improve the flocculating setting effect of titanium dioxide.
It should be noted that the addition of flocculant, aluminum sulfate can use variable frequency pump to add, it can specifically pass through filtrate
Middle titanium white powder content adjusts addition, and the concrete operations that those skilled in the art can settle according to being actually needed to mixing
Condition is selected.
S300：Bottom slurry is mixed with material supply after the first coating into slurry surge tank, and gained is mixed
Slurry is back to S100 and carries out pressure filtration washing processing
In the step, material supply to slurry after bottom slurry and the first coating isolated in above-mentioned subsider is buffered
Mixed in tank, so as to obtain mixed slurry, and gained mixed slurry is back in S100 steps and carries out pressure filtering cleaning
Wash processing.
According to one embodiment of present invention, material can be that the sampling in coating process back segment is returned after the first coating
Material.It is to be understood that unless otherwise specified, " coating process back segment " mentioned in this article can refer to disclosed patent CN
Coating processing is carried out to fine grained titanium dioxide under the conditions of pH=7~8 at a temperature of 50~70 DEG C using auxiliary agent in 1066043
Material is the intermediate products obtained after coating is handled in any process after any process after process, i.e. the first coating, and coating
Returning charge is sampled in process back segment to be detected in production process of titanium pigment to the intermediate products of any process after coating processing
Sample after analysis.Inventor has found, by using slurries surge tank by the bottom slurry obtained in subsider and coating process
Supply, can into pressure filtration washing process after the sampling returning charge that back segment intermediate products obtain during being tested and analyzed is mixed
To solve original caused by the sampling returning charge bulk deposition obtained during coating process back segment intermediate products are tested and analyzed
Expect the problem wasted, and then not only increase the rate of recovery of titanium, and can realize to the controllable of titanium dioxide product quality and
Ensure the continuity of production.
S400：Material supply before material before first coating and the second coating is subjected to coating processing into coating tank
In the step, material before material before the first coating and the second coating is subjected to coating processing, after obtaining the second coating
Material.It should be noted that those skilled in the art can according to being actually needed to the particular type of used coating agent and
Coating condition is selected.
According to one embodiment of present invention, expect to refer to come from coating process leading portion before the first coating normally to produce
Supplied materials, material comes from the sampling returning charge in coating process leading portion before the second coating.It is to be understood that unless otherwise specified, this
" the normally production supplied materials in coating process leading portion " referred in text, which can refer in disclosed patent CN 1066043, uses auxiliary agent
Process slurry before coating treatment process is carried out under the conditions of pH=7~8 at a temperature of 50~70 DEG C to fine grained titanium dioxide；Herein
In " the coating process leading portion " that refers to can refer in disclosed patent CN 1066043 using auxiliary agent at a temperature of 50~70 DEG C
Any process before coating treatment process is carried out under the conditions of pH=7~8 to fine grained titanium dioxide, i.e. material is before the second coating
The intermediate products obtained before coating processing in any process, and it is in titanium white production mistake that returning charge is sampled in coating process leading portion
Sample after being tested and analyzed in journey to the intermediate products of any process of coating before processing.
S500：It material supply will be stored into storage tank before press filtration, and will be stored in before press filtration in storage tank after second coating
The second coating after material supply to pressure filtration washing device
In the step, material supply after above-mentioned the second resulting coating is stored into storage tank before press filtration, and will deposit
Material is back to the progress pressure filtration washing processing of S100 steps after storing up the second coating before press filtration in storage tank.Thus, by by coating
Normal production in sampling returning charge and coating front-end-of-line that process leading portion intermediate products obtain during being tested and analyzed comes
Material is back to pressure filtration washing device after storage tank before follow-up press filtration after coating is handled and handled, and can effectively reclaim subsider
In do not flocculate complete titanium dioxide, so as to the complete titanium dioxide that effectively avoids not flocculating into sewage mixing channel, accident groove
I.e. in the raw water box of saliferous workshop section, and can solve what is obtained during coating process leading portion intermediate products are tested and analyzed
The problem of wastage of material caused by sampling returning charge bulk deposition, and then the rate of recovery of titanium is not only increased, and can realize
To the controllable of titanium dioxide product quality and ensure the continuity produced, and the processing chloridising production titanium dioxide in the application
Larger improvement need not be made in the system of slurry to original system.
The method of processing chloridising production Titanium dioxide slurry according to embodiments of the present invention by chloridising by producing titanium white
Filtrate after slurry material progress pressure filtration washing is supplied into subsider to carry out mixing settlement treatment with flocculant, and uses slurries
What surge tank obtained during being tested and analyzed the bottom slurry obtained in subsider and coating process back segment intermediate products
Supply carries out pressure filtration washing processing into pressure filtration washing device after sampling returning charge is mixed, while by among coating process leading portion
Normal production supplied materials in sampling returning charge and coating front-end-of-line that product obtains during being tested and analyzed is handled through coating
Handled by pressure filtration washing device is back to after storage tank before press filtration, can effectively reclaim the complete titanium that do not flocculated in subsider
White powder, so as to the complete titanium dioxide that effectively avoids not flocculating into sewage mixing channel, the raw water of accident Cao Ji saliferous workshop section
In case, and can solve coating process leading portion and back segment intermediate products tested and analyzed during obtained sampling returning charge it is big
The problem of wastage of material caused by amount accumulation, and then the rate of recovery of titanium is not only increased, and can realize and titanium dioxide is produced
The continuity that is controllable and ensureing production of quality.
With reference to figure 6, the method for processing chloridising according to embodiments of the present invention production Titanium dioxide slurry further comprises：
S600：Filter cake is supplied to sudden strain of a muscle equipment for drying and carries out flash drying processing
In the step, the filter cake that S100 pressure filtration washing steps obtain is supplied into sudden strain of a muscle equipment for drying and carried out at flash drying
Reason, so as to obtain titanium dioxide coating particle.It should be noted that those skilled in the art can be according to being actually needed pair
The concrete operations condition for dodging dry-cure is selected.
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 the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (8)
- A kind of 1. system for handling chloridising production Titanium dioxide slurry, it is characterised in that including：Pressure filtration washing device, the pressure filtration washing device has Titanium dioxide slurry entrance, filtered solid outlet and filtrate (liquid, and is suitable to Pressure filtration washing processing is carried out to Titanium dioxide slurry, to obtain filter cake and filtrate；Subsider, the subsider have filtrate inlet, flocculant entrance, supernatant outlet and bottom slurry outlet, the filter Liquid entrance is connected with the filtrate (liquid, and suitable for carrying out the filtrate with flocculant to mix sedimentation, to obtain supernatant With bottom slurry；Slurry surge tank, the slurry surge tank expect entrance and surge tank discharging opening after having surge tank charging aperture, the first coating, The surge tank charging aperture is connected with the bottom slurry outlet, the surge tank discharging opening and the Titanium dioxide slurry entrance phase Even, and suitable for the bottom slurry is mixed with expecting after the first coating, to obtain mixed slurry, and by the mixing slurry Material is back to the pressure filtration washing device and carries out the pressure filtration washing processing；Coating tank, the coating tank export with material after expecting entrance and the second coating before material entrance, the second coating before the first coating, And suitable for will material carries out coating processing before material and the second coating before the first coating, to expect after obtaining the second coating；AndStorage tank before press filtration, storage tank expects entrance and outlet after having the second coating before the press filtration, expects after second coating Entrance is connected with material outlet after second coating, and the outlet is connected with the Titanium dioxide slurry entrance, and suitable for depositing Expect after storing up second coating, and by material supply after the coating into the pressure filtration washing device.
- 2. system according to claim 1, it is characterised in that further comprise：First sampling material-returning device, described first Expect that entrance is connected with the described first sampling material-returning device after coating, and the first sampling material-returning device is arranged on titanium dioxide bag Membrane process back segment.
- 3. system according to claim 1 or 2, it is characterised in that further comprise：Second sampling material-returning device, it is described For second sampling material-returning device with expecting that entrance is connected before second coating, the second sampling material-returning device is arranged on titanium dioxide bag Membrane process leading portion.
- 4. system according to claim 3, it is characterised in that further comprise：Equipment for drying is dodged, the sudden strain of a muscle equipment for drying is connected with the filtered solid outlet, and suitable for the filter cake is carried out into flash drying processing, To obtain titanium dioxide coating particle.
- 5. a kind of method of system processing chloridising production Titanium dioxide slurry using any one of claim 1-4, its It is characterised by, including：Titanium dioxide slurry is supplied into the pressure filtration washing device and carries out pressure filtration washing processing, to obtain filter cake and filtrate；The filtrate is supplied with flocculant and carries out mixing sedimentation into the subsider, to obtain supernatant and bottom slurry Material；The bottom slurry is mixed with material supply after the first coating into the slurry surge tank, to obtain mixing slurry Material, and the mixed slurry is back in the pressure filtration washing device and carries out the pressure filtration washing processing；Material before first coating and material supply before the second coating are subjected to coating processing into the coating tank, to obtain the second bag Expect after film；AndMaterial supply after second coating is stored into storage tank before the press filtration, and storage tank before the press filtration will be stored in In the second coating after material supply the pressure filtration washing processing is carried out into the pressure filtration washing device.
- 6. according to the method for claim 5, it is characterised in that material comes from coating process back segment after first coating Sampling returning charge.
- 7. the method according to claim 5 or 6, it is characterised in that before material comes from coating process before first coating It is normal in section to produce supplied materials, expect to come from the sampling returning charge in coating process leading portion before second coating.
- 8. according to the method for claim 7, it is characterised in that further comprise：The filter cake is supplied to sudden strain of a muscle equipment for drying Middle progress flash drying processing, to obtain titanium dioxide coating particle.
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| CN1328962A (en) * | 2000-06-15 | 2002-01-02 | 泰兴纳米材料厂 | Method for preparing nanometer titanium dioxide micropowder |
| CN203668019U (en) * | 2013-12-09 | 2014-06-25 | 云南新立有色金属有限公司 | System for preparing titanium dioxide |
| CN105771352A (en) * | 2016-04-27 | 2016-07-20 | 安徽金星钛白（集团）有限公司 | Chemical-fiber titanium dioxide washing system and chemical-fiber titanium dioxide washing method |
| CN206188417U (en) * | 2016-09-19 | 2017-05-24 | 云南冶金新立钛业有限公司 | System for handle way of chloride production titanium white powder thick liquids |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7255847B2 (en) * | 2004-11-16 | 2007-08-14 | The Hong Kong Polytechnic University | Method for making single-phase anatase titanium oxide |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328962A (en) * | 2000-06-15 | 2002-01-02 | 泰兴纳米材料厂 | Method for preparing nanometer titanium dioxide micropowder |
| CN203668019U (en) * | 2013-12-09 | 2014-06-25 | 云南新立有色金属有限公司 | System for preparing titanium dioxide |
| CN105771352A (en) * | 2016-04-27 | 2016-07-20 | 安徽金星钛白（集团）有限公司 | Chemical-fiber titanium dioxide washing system and chemical-fiber titanium dioxide washing method |
| CN206188417U (en) * | 2016-09-19 | 2017-05-24 | 云南冶金新立钛业有限公司 | System for handle way of chloride production titanium white powder thick liquids |
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