CN115594215B - Method and equipment for controlling particle size of primary titanium dioxide product by using chlorination process - Google Patents
Method and equipment for controlling particle size of primary titanium dioxide product by using chlorination process Download PDFInfo
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- CN115594215B CN115594215B CN202211288648.4A CN202211288648A CN115594215B CN 115594215 B CN115594215 B CN 115594215B CN 202211288648 A CN202211288648 A CN 202211288648A CN 115594215 B CN115594215 B CN 115594215B
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000002245 particle Substances 0.000 title claims abstract description 56
- 230000008569 process Effects 0.000 title claims abstract description 25
- 238000005660 chlorination reaction Methods 0.000 title claims abstract description 10
- 239000004408 titanium dioxide Substances 0.000 title description 11
- 230000005684 electric field Effects 0.000 claims abstract description 63
- 238000006243 chemical reaction Methods 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 54
- 235000010215 titanium dioxide Nutrition 0.000 claims abstract description 51
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims abstract description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000001301 oxygen Substances 0.000 claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 31
- 230000003647 oxidation Effects 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000008247 solid mixture Substances 0.000 claims description 9
- NSYYPXSKPGPMBW-UHFFFAOYSA-N [O-2].[O-2].[Ti+4].Cl Chemical compound [O-2].[O-2].[Ti+4].Cl NSYYPXSKPGPMBW-UHFFFAOYSA-N 0.000 claims description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000460 chlorine Substances 0.000 claims description 6
- 229910052801 chlorine Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000008901 benefit Effects 0.000 abstract description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 5
- 239000000654 additive Substances 0.000 abstract description 3
- 235000011164 potassium chloride Nutrition 0.000 abstract description 3
- 239000001103 potassium chloride Substances 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 16
- 239000011164 primary particle Substances 0.000 description 12
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000012463 white pigment Substances 0.000 description 2
- 230000005653 Brownian motion process Effects 0.000 description 1
- 229910003074 TiCl4 Inorganic materials 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The application provides a method and equipment for controlling the grain size of a primary titanium white product by a chlorination process, wherein the method comprises the following steps: setting parameters of an electric field applied to a mixed reaction zone and/or a cooling zone according to the particle size of a target titanium white primary product; introducing the heated oxygen into an oxygen channel; heating TiCl 4 And AlCl 3 Introducing a feeding channel to react with oxygen in a mixed reaction zone; and cooling and separating the titanium chloride white oxidation primary product generated by the reaction in a cooling zone. The scheme of the application can conveniently control the granularity of the titanium white primary product and optimize the granularity distribution of the powder. The average grain diameter of the titanium chloride white primary product produced by the method can reach a controllable level of 180-260 nm. In addition, the scheme of the application has the advantages of low cost and simple operation, and particularly, the use of additives such as potassium chloride is eliminated, so that obvious economic benefits can be brought if the scheme is popularized and applied in the titanium chloride industry.
Description
Technical Field
The application relates to the technical field of titanium dioxide production by a chlorination method, in particular to a method and equipment for controlling the particle size of a primary titanium dioxide product by the chlorination method.
Background
There are currently two main processes for producing titanium dioxide: the chlorination process and the sulfuric acid process. Compared with the sulfuric acid method, the chlorination method has the advantages of high automation degree, advanced technology, high quality and environmental protection, and thus gradually becomes the main trend of the development of the titanium white industry. The titanium dioxide has stable property, is the best white pigment at present, and is widely applied to the fields of paint, plastics, paper making, printing ink and the like. Titanium chloride white of different particle sizes has a large influence on optical properties, for example: titanium chloride white with the granularity of 220-240nm has excellent visual whiteness and excellent covering power and decoloring power in an aqueous and oily system; titanium chloride with the granularity of 180nm-200nm has better white pigment property in a plastic and resin system. In the production process of the titanium chloride, the particle size of the primary product of the titanium chloride determines the particle size of the finished product of the titanium chloride, so that the control of the particle size of the primary product is a key link for controlling the type and quality grade of the finished product of the titanium chloride, and how to control the particle size of the titanium chloride and optimize the particle size distribution becomes a problem to be solved urgently.
Against this background, the inventors of the present application have realized that there is still room for further improvement in this type of prior art solution.
Disclosure of Invention
The present disclosure summarizes aspects of the embodiments and should not be used to limit the claims. Other embodiments may be devised in light of the techniques described herein, which will be apparent to one of ordinary skill in the art upon examination of the following figures and detailed description, and are intended to be included within the scope of the present application.
The inventor of the present application has recognized that there is a need for a method and apparatus for controlling the particle size of a primary titanium white product by the chloride process, which is capable of conveniently controlling the particle size of the primary titanium white product while optimizing the particle size distribution of the powder, and which is advantageous in that it is low in cost and simple in operation.
According to one aspect of the application, there is provided a method for controlling the particle size of a primary titanium white product by a chloride process, comprising the steps of:
setting parameters of an electric field applied to a mixed reaction zone and/or a cooling zone according to the particle size of a target titanium white primary product;
introducing the heated oxygen into an oxygen channel;
heating TiCl 4 And AlCl 3 Introducing a feeding channel to react with oxygen in a mixed reaction zone;
and cooling and separating the titanium chloride white oxidation primary product generated by the reaction in a cooling zone.
According to one embodiment of the application, the setting of the parameters of the electric field applied to the mixed reaction zone and/or the cooling zone according to the target titanium white primary particle size comprises:
the length of the region of the electric field applied to the mixing reaction zone and/or the cooling zone is set according to the particle size of the target titanium white primary product.
According to one embodiment of the application, the setting of the parameters of the electric field applied to the mixed reaction zone and/or the cooling zone according to the target titanium white primary particle size comprises:
the electric field strength of the electric field applied to the mixing reaction zone and/or the cooling zone is set according to the particle size of the target titanium white primary product.
According to one embodiment of the application, the setting of the parameters of the electric field applied to the mixed reaction zone and/or the cooling zone according to the target titanium white primary particle size comprises:
an electric field is applied to a region of the mixing reaction zone and/or the cooling zone spaced apart from the feed inlet of the feed channel by a predetermined distance.
According to one embodiment of the application, the cooling and separating of the titanium chloride white oxidation primary product generated by the reaction in the cooling zone comprises:
and cooling the gas-solid mixture generated by the reaction through a water bath metal conduit in a cooling zone, wherein the temperature of the end of the conduit is controlled to be 150-200 ℃, and the pressure of circulating chlorine is controlled to be 100-220 kPa.
According to one embodiment of the application, the cooling and separating of the titanium chloride white oxide primary product generated by the reaction comprises the following steps:
and (3) carrying out gas-solid separation on the cooled gas-solid mixture to obtain a titanium chloride white primary product.
According to another aspect of the present application, there is provided a control apparatus for controlling a particle size of a primary titanium white product by a chloride process, comprising:
the oxygen channel is used for receiving the preheated oxygen;
the mixed reaction zone is communicated with the oxygen channel;
TiCl 4 the feed inlet is arranged between the oxygen channel and the mixed reaction zone;
a controllable electric field device configured to apply an electric field to the mixed reaction zone,
the parameters of the electric field applied by the controllable electric field device are determined based on the particle size of the target titanium white primary product to be generated.
According to one embodiment of the application, the controllable electric field means is configured to apply an electric field to a region of the mixed reaction zone that is 0.05m-25m from the feed inlet.
According to one embodiment of the application, the reactor further comprises a cooling zone in communication with the mixed reaction zone, and the controllable electric field device is further configured to apply an electric field to the cooling zone.
According to one embodiment of the application, wherein the parameter of the electric field comprises the length of the area of the applied electric field or the strength of the electric field.
The scheme of the application can conveniently control the granularity of the titanium white primary product and optimize the granularity distribution of the powder. The average grain diameter of the titanium chloride white primary product produced by the method can reach a controllable level of 180-260 nm. In addition, the scheme of the application has the advantages of low cost and simple operation, and particularly, the use of additives such as potassium chloride is eliminated, so that obvious economic benefits can be brought if the scheme is popularized and applied in the titanium chloride industry.
Drawings
For a better understanding of the application, reference may be made to the embodiments illustrated in the following drawings. The components in the figures are not necessarily to scale and related elements may be omitted or the proportions may have been exaggerated in some cases in order to emphasize and clearly illustrate the novel features described herein. In addition, the system components may be arranged differently, as is known in the art. Furthermore, in the drawings, like reference numerals designate corresponding parts throughout the several views.
FIG. 1 shows a block diagram of a method for controlling the particle size of a primary titanium white product by a chloride process according to an embodiment of the application;
FIG. 2 is a block diagram showing a method for controlling the particle size of a primary titanium white product by a chloride process according to another embodiment of the present application;
fig. 3 shows a schematic diagram of a chloride process titanium white primary particle size control apparatus according to an embodiment of the present application.
100. 200, two examples of a method for controlling the particle size of a titanium white primary product by a chloride process; 110-140, steps one to four of an embodiment of a method for controlling the particle size of a titanium white primary product by a chloride process; 210-260, and steps one to six of another embodiment of the method for controlling the particle size of the titanium dioxide primary product by the chloride process; 10. the particle size control equipment of the primary titanium white product by the chlorination process; 12. an oxygen passage; 14. a mixing reaction zone; 16. a feed inlet; 18. a controllable electric field device; 20. and a cooling zone.
Detailed Description
Embodiments of the present disclosure are described below. However, it is to be understood that the disclosed embodiments are merely examples and that other embodiments may take various alternative forms. The figures are not necessarily to scale; some functions may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present application. As will be appreciated by one of ordinary skill in the art, the various features illustrated and described with reference to any one of the figures may be combined with features illustrated in one or more other figures to produce embodiments that are not explicitly illustrated or described. The combination of features shown provides representative embodiments for typical applications. However, various combinations and modifications of the features consistent with the teachings of the present disclosure may be desired for certain specific applications or implementations.
As mentioned in the background section above, the present inventors have realized that there is room for improvement in prior art chloride process titanium white primary particle size control schemes. The inventors of the present application have provided, in one or more embodiments, a method and apparatus for controlling the particle size of a titanium white primary product in a chloride process, which is believed to solve one or more of the problems of the prior art.
According to one aspect of the present application, there is provided a method 100 for controlling the particle size of a primary titanium white product by the chloride process, referring to the flowchart in fig. 1 and the apparatus shown in fig. 3, comprising the steps of:
step 110, setting parameters of an electric field applied to the mixed reaction zone 14 and/or the cooling zone 20 according to the particle size of the target titanium white primary product;
step 120, introducing the heated oxygen into the oxygen channel 12;
step 130, introducing the heated TiCl4 and AlCl3 into a feed channel to react with oxygen in the mixed reaction zone 14;
step 140 cools and separates the primary titanium chloride oxide product produced by the reaction in cooling zone 20.
In the region where the electric field is applied, the electric field is controlled to collide and form a plurality of uniform TiO 2 And (3) particles. The present application allows for newly generated TiO by applying a controllable electric field across the mixed reaction zone 14 and/or the cooling zone 20 2 Charged ions are attached to the particle surface. Micro TiO 2 The particles undergo Brownian motion in the mixing reaction zone 14 of the oxidation reactor, collide with each other and grow up continuously, but due to the different sizes among the particles, the smaller particles have a faster motion speed under the action of electromagnetic force, can rapidly approach to large particle crystals, and are mutually fused under the action of high temperature. The growth of the crystal size of the titanium dioxide is promoted, and a plurality of uniform particles are obtained, so that the particle size distribution of the powder is optimized while the particle size of the particles is improved.
It will be appreciated by those skilled in the art that the order of the steps of the method described above and illustrated below is not limited to the order listed and may be modified as desired in practice without departing from the scope of the application.
Referring to fig. 2, which is a block diagram of a method 200 for controlling the particle size of a titanium white primary product according to another embodiment of the present application, step 110 may include setting parameters of an electric field applied to the mixing reaction zone 14 and/or the cooling zone 20 according to the target titanium white primary product particle size:
step 210 sets the zone length of the electric field applied to the mixing reaction zone 14 and/or the cooling zone 20 according to the target titanium white primary particle size and/or sets the electric field strength of the electric field applied to the mixing reaction zone 14 and/or the cooling zone 20 according to the target titanium white primary particle size. For example, for a conventional chloride process titanium dioxide production process, the applied electric field may have a zone length of between 10-30 m; the applied electric field strength may be between e=u/d=220 to 370V/m, where U is the voltage and d is the reaction zone or cooling conduit diameter, for example 80 to 230mm.
In some further embodiments, referring to the chloride process titanium dioxide primary particle size control method 200 of fig. 2, step 110 of setting parameters of the electric field applied to the mixing reaction zone 14 and/or the cooling zone 20 according to the target titanium dioxide primary particle size may comprise:
step 220 applies an electric field to a region of the mixing reaction zone 14 and/or the cooling zone 20 spaced apart from the feed inlet 16 of the feed channel by a predetermined distance range, such as a region 0.05m-25m from the feed inlet.
In addition, with continued reference to the method 200 for controlling the particle size of the primary titanium dioxide chloride product in fig. 2, the cooling and separating the primary titanium dioxide chloride product generated by the reaction in the cooling zone 20 in step 140 may include:
step 250, the gas-solid mixture generated by the reaction is cooled by a water bath metal conduit in the cooling zone 20, the temperature of the end of the conduit is controlled to be 150-200 ℃, and the pressure of circulating chlorine is controlled to be 100-220 kPa.
Further, the cooling and separating the initial oxidized product of the titanium chloride white generated by the reaction in step 140 further comprises:
and step 260, performing gas-solid separation on the cooled gas-solid mixture to obtain a titanium chloride white primary product.
Several embodiments implemented based on the above concepts will be further described below with reference to fig. 3.
Example 1
In this example, the target primary titanium chloride white product particle size to be produced is required to be about 180nm, and thus an electric field is applied in the range of 0.05m to 17m apart from the feed inlet 16 of the feed channel in the mixing reaction zone 14 and/or the cooling zone 20, with the applied electric field strength of e=u/d=370v/m.
Next, oxygen was preheated to 890 degrees celsius and fed into the oxygen passage 12, the supply speed of oxygen being set to 1200 kg/hr; preheating titanium tetrachloride to 450 ℃ and mixing with an aluminum trichloride aqueous solution, and then entering a feed inlet 16 through a feed channel, wherein the feed rate of titanium tetrachloride is set to 5.5 tons/hour, the mass of aluminum trichloride is set to 1% of that of titanium tetrachloride, and the feed rate is set to about 11 kg/hour, as shown in FIG. 3; all materials react under the influence of an electric field in the mixed reaction zone 14, then are cooled in a water bath metal conduit in a cooling zone 20 connected with the mixed reaction zone 14, the temperature of the tail end of the conduit is controlled to be 150-200 ℃, the circulating chlorine pressure is controlled to be 100-220 kPa, and finally, the cooled gas-solid mixture is subjected to gas-solid separation to obtain a titanium chloride white primary product, wherein the actually measured granularity of the titanium chloride white primary product is about 180+/-10 nm.
Example 2
In this example, the target primary titanium chloride white product particle size to be produced is required to be about 210nm, and thus an electric field is applied in the range of 0.05m to 17m apart from the feed inlet 16 of the feed channel in the mixing reaction zone 14 and/or the cooling zone 20, with the applied electric field strength of e=u/d=270V/m.
Next, oxygen was preheated to 890 degrees celsius and fed into the oxygen passage 12, the supply speed of oxygen being set to 1200 kg/hr; preheating titanium tetrachloride to 450 ℃ and mixing with an aluminum trichloride aqueous solution, and then entering a feed inlet 16 through a feed channel, wherein the feed rate of titanium tetrachloride is set to 5.5 tons/hour, the mass of aluminum trichloride is set to 1% of that of titanium tetrachloride, and the feed rate is set to about 11 kg/hour, as shown in FIG. 3; all materials react under the influence of an electric field in the mixed reaction zone 14, then are cooled in a water bath metal conduit in a cooling zone 20 connected with the mixed reaction zone 14, the temperature of the tail end of the conduit is controlled to be 150-200 ℃, the circulating chlorine pressure is controlled to be 100-220 kPa, and finally, the cooled gas-solid mixture is subjected to gas-solid separation to obtain a titanium chloride white primary product, wherein the actually measured granularity of the titanium chloride white primary product is about 210+/-10 nm.
Example 3
In this example, the target primary titanium chloride white product particle size to be produced is required to be about 260nm, and thus an electric field is applied in the range of 0.05m to 17m apart from the feed inlet 16 of the feed channel in the mixing reaction zone 14 and/or the cooling zone 20, with the applied electric field strength of e=u/d=220v/m.
Next, oxygen was preheated to 890 degrees celsius and fed into the oxygen passage 12, the supply speed of oxygen being set to 1200 kg/hr; preheating titanium tetrachloride to 450 ℃ and mixing with an aluminum trichloride aqueous solution, and then entering a feed inlet 16 through a feed channel, wherein the feed rate of titanium tetrachloride is set to 5.5 tons/hour, the mass of aluminum trichloride is set to 1% of that of titanium tetrachloride, and the feed rate is set to about 11 kg/hour, as shown in FIG. 3; all materials react under the influence of an electric field in the mixed reaction zone 14, then are cooled in a water bath metal conduit in a cooling zone 20 connected with the mixed reaction zone 14, the temperature of the tail end of the conduit is controlled to be 150-200 ℃, the circulating chlorine pressure is controlled to be 100-220 kPa, and finally, the cooled gas-solid mixture is subjected to gas-solid separation to obtain a titanium chloride white primary product, wherein the actually measured granularity of the titanium chloride white primary product is about 260+/-10 nm.
According to another aspect of the present application, referring to fig. 3, the present application further provides a chloride process titanium white primary particle size control apparatus 10 comprising: an oxygen channel 12, the oxygen channel 12 for receiving preheated oxygen; a mixed reaction zone 14, the mixed reaction zone 14 being in communication with the oxygen passage 12; tiCl 4 A feed inlet 16, the feed inlet 16 being provided between the oxygen passage 12 and the mixing reaction zone 14; and a controllable electric field device 18, the controllable electric field device 18 being configured to apply an electric field to the mixed reaction zone 14, wherein a parameter of the electric field applied by the controllable electric field device 18 is determined based on the target titanium white primary particle size to be generated.
In some embodiments of the application, the controllable electric field device 18 is configured to apply an electric field to a region of the mixed reaction zone 14 that is 0.05m-25m from the feed inlet. In some embodiments of the present application, the chloride process titanium white primary particle size control apparatus 10 further comprises a cooling zone 20, the cooling zone 20 being in communication with the mixing reaction 14 zone, the controllable electric field device 18 being further configured to apply an electric field to the cooling zone 20. In some embodiments of the application, the parameter of the electric field comprises the length of the region of the applied electric field or the strength of the electric field.
In the present document, when an element or portion is referred to as being "on," "engaged to," "connected to," or "coupled to" another element or portion, it can be directly on, engaged, connected, or coupled to the other element or portion, or intervening elements or portions may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," or "directly coupled to" another element or portion, there may be no intervening elements or portions present. Other words used to describe the relationship between elements should be interpreted in a similar fashion.
It should be appreciated that all of the embodiments, features and advantages set forth above for the method 100, 200 for controlling the particle size of a primary titanium dioxide chloride product according to the first aspect of the present application are equally applicable to the apparatus 10 for controlling the particle size of a primary titanium dioxide chloride product according to the other aspect of the present application, without conflicting with each other. That is, all of the embodiments and variations thereof described above may be applied directly and incorporated herein. For the sake of brevity of this disclosure, the description is not repeated here.
In summary, compared with the prior art, the application provides the method and the equipment for controlling the particle size of the primary titanium white product by the chlorination process, and the scheme of the application can conveniently control the particle size of the primary titanium white product and optimize the particle size distribution of the powder. The average grain diameter of the titanium chloride white primary product produced by the method can reach a controllable level of 180-260 nm. In addition, the scheme of the application has the advantages of low cost and simple operation, and particularly, the use of additives such as potassium chloride is eliminated, so that obvious economic benefits can be brought if the scheme is popularized and applied in the titanium chloride industry.
It should be understood that the technical features listed above for the different embodiments may be combined with each other to form further embodiments within the scope of the application, where technically feasible.
In the present application, the use of the anti-connotation term is intended to include the connotation term. The use of definite or indefinite articles is not intended to indicate cardinality. In particular, references to "the" object or "a" and "an" object are intended to mean a possible one of a plurality of such objects. Furthermore, rather than a mutually exclusive approach, the conjunction "or" may be used to convey a simultaneous feature. In other words, the conjunctive word "or" is to be understood as comprising "and/or". The term "comprising" is inclusive and has the same scope as "comprising".
The above examples are possible examples of embodiments of the present application and are given only for the purpose of clearly understanding the principle of the present application to those skilled in the art. Those skilled in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosure of embodiments of the application, including the claims, is limited to such examples. The technical features of the above embodiments or in different embodiments can also be combined with each other under the general inventive concept and many other variations of the different aspects of the embodiments of the application as described above are produced, which are not provided in the detailed description for the sake of brevity. Therefore, any omissions, modifications, equivalents, improvements and others that are within the spirit and principles of the embodiments are intended to be included within the scope of the application as claimed.
Claims (3)
1. A method for controlling the particle size of a primary titanium white product by a chlorination process comprises the following steps:
setting parameters of an electric field applied to a mixed reaction zone and/or a cooling zone according to the particle size of a target titanium white primary product;
introducing the heated oxygen into an oxygen channel;
heating TiCl 4 And AlCl 3 Introducing a feed channel to react with oxygen in the mixed reaction zone;
cooling and separating a titanium chloride white oxidation primary product generated by the reaction in the cooling zone;
wherein, the setting of the parameters of the electric field applied to the mixed reaction zone and/or the cooling zone according to the particle size of the target titanium white primary product comprises:
setting the length of an area of an electric field applied to a mixed reaction area and/or a cooling area according to the particle size of a target titanium white primary product;
setting the electric field strength of an electric field applied to the mixed reaction zone and/or the cooling zone according to the particle size of the target titanium white primary product;
applying the electric field to a region of the mixing reaction zone and/or the cooling zone spaced apart from the feed inlet of the feed channel by a preset distance range;
the grain size of the target titanium white primary product is 210-260nm, the length of the area of the applied electric field is 10-30m, the strength of the applied electric field is 220-370V/m, and the electric field is applied to the area which is 0.05-25 m away from the feed inlet.
2. The method for controlling the particle size of a primary titanium dioxide chloride product according to claim 1, wherein the cooling and separating the primary titanium dioxide chloride oxide product generated by the reaction in the cooling zone comprises:
and cooling the gas-solid mixture generated by the reaction through a water bath metal conduit in a cooling zone, wherein the temperature of the end of the conduit is controlled to be 150-200 ℃, and the pressure of circulating chlorine is controlled to be 100-220 kPa.
3. The method for controlling the particle size of a primary titanium dioxide chloride product according to claim 2, wherein the cooling and separating the primary titanium dioxide chloride oxide product generated by the reaction comprises:
and (3) carrying out gas-solid separation on the cooled gas-solid mixture to obtain a titanium chloride white primary product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211288648.4A CN115594215B (en) | 2022-10-20 | 2022-10-20 | Method and equipment for controlling particle size of primary titanium dioxide product by using chlorination process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211288648.4A CN115594215B (en) | 2022-10-20 | 2022-10-20 | Method and equipment for controlling particle size of primary titanium dioxide product by using chlorination process |
Publications (2)
| Publication Number | Publication Date |
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| CN115594215A CN115594215A (en) | 2023-01-13 |
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| WO1999018032A1 (en) * | 1997-10-06 | 1999-04-15 | Hosokawa Micron International, Inc. | Method and apparatus for vapor phase manufacture of nanoparticles |
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| CN112250108A (en) * | 2020-10-30 | 2021-01-22 | 攀钢集团钛业有限责任公司 | Production method of titanium white chloride primary product for plastics |
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| US5698177A (en) * | 1994-08-31 | 1997-12-16 | University Of Cincinnati | Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst |
| WO1999018032A1 (en) * | 1997-10-06 | 1999-04-15 | Hosokawa Micron International, Inc. | Method and apparatus for vapor phase manufacture of nanoparticles |
| CN102731700A (en) * | 2012-07-03 | 2012-10-17 | 浙江大学 | Method for controlling particles distribution by adopting electric field and gas phase polymerization fluidized bed reactor |
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