CN209481197U - A kind of rotary kiln producing anatase thpe white powder - Google Patents
A kind of rotary kiln producing anatase thpe white powder Download PDFInfo
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- CN209481197U CN209481197U CN201920043031.3U CN201920043031U CN209481197U CN 209481197 U CN209481197 U CN 209481197U CN 201920043031 U CN201920043031 U CN 201920043031U CN 209481197 U CN209481197 U CN 209481197U
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Abstract
The utility model discloses a kind of rotary kilns for producing anatase thpe white powder, cylinder including kiln hood lid, kiln tail case and inner hollow, the kiln hood, which covers, is provided with burner, feed device is provided on the kiln tail case, combustion platform is equipped in the middle part of the inner barrel, several lifting blades are provided on cylinder inboard wall between the combustion platform and burner, the lifting blade is axially uniformly arranged along cylinder.The rotary kiln of the utility model can be such that material obtains in high-temperature region fully dispersed, avoid agglomerating, ensure that anatase titanium dioxide grain growth, and the titanium dioxide primary product made has good reducing power, hardness and color.
Description
Technical field
The utility model relates to field of titanium dioxide production, especially a kind of rotary kiln for producing anatase thpe white powder.
Background technique
Rotary kiln is common calciner plant during Titanium White Production By Sulfuric Acid Process.In Titanium White Production By Sulfuric Acid Process process
In, usually ilmenite concentrate and titanium slag are mixed and are crushed, generates metatitanic acid using processes such as acidolysis, hydrolysis, salt treatment, so
High-temperature calcination is carried out in rotary kiln afterwards, metatitanic acid is made to be converted into titanium dioxide, titanium dioxide primary product is obtained, most afterwards through crushing packing
Obtain titanium dioxide finished product.When metatitanic acid is burnt in rotary kiln, in addition to being dehydrated desulfurization, conversion and grain are most importantly carried out
Son two processes of growth；And the titanium dioxide with pigment performance has two kinds of crystal forms of anatase titanium dioxide and rutile-type.
In the calcination process of production anatase titanium dioxide, rotary kiln temperature controls the most key, usual sulfuric acid process
Metatitanic acid obtained stably generates anatase titanium dioxide when lower temperature is calcined, and begins to when temperature is more than 900 DEG C to rutile-type
Conversion, therefore, it is necessary to the calcination temperatures in each section inside strict control rotary kiln, meanwhile, existing rotary kiln is generally deposited
Cause conversion ratio low in energy consumption height, titanium dioxide easy-sintering, finally obtains the unstable quality of product, especially reducing power, face
The problems such as expecting color and serious hardness fluctuations.
In existing patent, application No. is 201721137899.7, the applying date is that the patent of 2017.09.06 discloses one kind
Insulating layer is arranged in sulfuric acid method titanium pigment calcination rotary kiln on the cylinder of rotary kiln, and double heat preservations especially are arranged in high-temperature region
Layer extends material in the time of high-temperature region, keeps metatitanic acid desulfurization more thorough, the transformation of crystal time is longer, and titanium dioxide crystal grain is more
It is uniform and stable.However, the setting of its insulating layer is only capable of slowing down temperature gradient, transformation time extends, and can not guarantee inclined titanium
Acid is uniformly dispersed in calcination process, and burner cannot guarantee that combustion even, to be also easy to produce titanium dioxide caking phenomenon.
Utility model content
The purpose of this utility model is that: in view of the above problems, provide a kind of time for producing anatase thpe white powder
Rotary kiln forms combustion space by setting combustion platform, reduces thickness of feed layer, improve the delivery rate of temperature, make rutile titania
Type crystal form is sufficiently converted, and is arranged by lifting blade, is obtained material in high-temperature region fully dispersed, is avoided agglomerating, and is guaranteed
Anatase titanium dioxide grain growth, the titanium dioxide primary product made have good reducing power, hardness and color.
The technical solution adopted in the utility model is as follows:
The rotary kiln of the production anatase thpe white powder of the utility model, the cylinder including kiln hood lid, kiln tail case and inner hollow
Body, the kiln hood, which covers, is provided with burner, and feed device is provided on the kiln tail case, is equipped in the middle part of the inner barrel
Combustion platform is provided with several lifting blades on the cylinder inboard wall between the combustion platform and burner, and the lifting blade is along cylinder
Axially it is uniformly arranged.
Further, the cylinder body outer wall is provided with rotational structure, and the rotational structure includes idler wheel and driving cog wheel rim,
The idler wheel is supported and fixed on ground or bracket by tugboat group, the transmission gear on the driving cog wheel rim and transmission device
Engagement, the transmission device can drive barrel body rotation.
Further, the cylinder is obliquely installed, and the height of the kiln hood is lower than the height of kiln tail.
Further, the trapezoidal shape in combustion platform section, it is oblique close to kiln tail one end, be in close to kiln hood one end
Vertical shape.
Further, it is provided with discharge port below the kiln hood lid, kiln tail case upper end is provided with exhanst gas outlet.
Further, drainage lid, the drainage lid flare are installed on the burner.
Further, the kiln tail case is provided with strainer close to cylinder one end, and the feeding port of the feed device passes through filter
Material is sent into inner barrel by net.
Further, the cylinder inboard wall is evenly arranged with insulating layer, and the insulating layer is laid with by refractory brick.
Further, the combustion platform, lifting blade are made of heat-resisting material.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1, rotary kiln in the present invention forms combustion space, just by the way that combustion platform is arranged in the middle part of inner barrel
In the conversion of control anatase titanium dioxide crystal form, meanwhile, combustion platform reduces inner barrel diameter, so as to reduce thickness of feed layer, mentions
The delivery rate of high-temperature makes the abundant rapid conversion of anatase titanium dioxide crystal form.
2, by the way that lifting blade is arranged in kiln hood, inner barrel is made to segment out grain growth region；Lifting blade is in cylinder inboard wall
Multiple convex blocks are formed, when material is when lifting blade region is reacted, convex block can make material irregular movement during overturning,
To keep material dispersion uniform, calcination temperature is uniform, avoids the contact for a long time of material and thermal-flame and material sintering, guarantees object
Material sufficiently grows into anatase titanium dioxide completely.
3, using the rotary kiln of the utility model, the production capacity of single device can be improved 60% or more, and calcination time can subtract
The quality of as little as 8h, the anatase thpe white powder that can and obtain are more stable, and sintering and clustering phenomena are reduced between particle, obtain
Particle shape is round and smooth regular, has good reducing power, hardness and color, and the ratio of first-grade products is increased to 99%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model rotary kiln；
Fig. 2 is sectional view along A-A in Fig. 1；
Marked in the figure: 1- burner, 2- kiln hood lid, 3- lifting blade, 4- cylinder, 5- combustion platform, 6- exhanst gas outlet, 7- feeding
Device, 8- kiln tail case, 9- motor, 10- transmission device, 11- transmission gear, 12- driving cog wheel rim, 13- tugboat group, 14- idler wheel,
15- drainage lid, 16- discharge port.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Embodiment 1
As shown in Figs. 1-2, the rotary kiln of the production anatase thpe white powder of the utility model, including kiln hood lid 2, kiln tail case 8
With the cylinder 4 of inner hollow, the kiln hood lid 2 and kiln tail case 8 are sealingly mounted at 4 both ends of cylinder, preferably available screw thread or
It is bolted but is not limited to the sealed connection mode of screw thread or bolt, to guarantee that sealing calcining is normally carried out in kiln, is convenient for simultaneously
The cleaning or maintenance of calciner plant；It is provided with burner 1 on the kiln hood lid 2, is provided with feed device on the kiln tail case
7, preferably feed device is feed screw；4 inside middle part of the cylinder is equipped with combustion platform 5, and the setting of combustion platform can be
Combustion space is formed in the middle part of cylinder, convenient for controlling the conversion of anatase titanium dioxide crystal form, meanwhile, combustion platform reduces inner barrel diameter,
So as to reduce thickness of feed layer, the delivery rate of temperature is improved, the abundant rapid conversion of anatase titanium dioxide crystal form is made.Further, described
Several lifting blades 3 are provided on 4 inner wall of cylinder between combustion platform 5 and burner 1, the lifting blade 3 is axial along cylinder 4
Even setting, lifting blade 3 are arranged in grain growth region, multiple convex blocks are formed in cylinder inboard wall, when material is in lifting blade region
When reaction, convex block can make material irregular movement during overturning, to keep material dispersion uniform, calcination temperature is equal
It is even, the contact for a long time of material and thermal-flame and material sintering are avoided, guarantees that anatase titanium dioxide particle shoots up.It is preferred that lifting blade 3
Settable 4-8 item, every size is identical, length 3.5m-5m, height 280mm-350mm, width 180-260mm.
As a preferred embodiment, the burner 1 includes gas inlet pipe, main blast pipe and secondary blast pipe, secondary
Blast pipe one end is arranged in gas inlet pipe, flushes with the combustion fire end of gas inlet pipe, the combustion fire end setting of gas inlet pipe
In main blast pipe, the combustion fire end of gas inlet pipe is arranged in main blast pipe, and slightly shorter than main blast pipe, preferably combustion gas can be coal
Gas.
Embodiment 2
Based on the above embodiment 1, in order to further enhance the efficiency of calcining, the titanium dioxide primary product enable is sufficiently arranged
Out, the cylinder 4 is obliquely installed, and preferred angled degree is 4%-6%, and the height of kiln hood is lower than the height of kiln tail, is obtained after making calcining
First product can converge in discharge port, sufficiently be discharged.
As a preferred embodiment, 4 outer wall of cylinder is provided with rotational structure, and rotational structure is able to drive cylinder
4 rotations, barrel body rotation is able to drive material and turns to eminence, then falls, and keeps its dispersion more abundant, so that calcination temperature is more equal
It is even, agglomerating sintering is further avoided, guarantees crystal form molding, drum speed can be controlled in 1-3min/ circle.Preferably, the rotation
Structure includes idler wheel 14 and driving cog wheel rim 12, and the idler wheel 14 is supported and fixed on ground or bracket by tugboat group 13, institute
It states driving cog wheel rim 12 to engage with the transmission gear 11 on transmission device 10, motor 9 is connected on the transmission device 11, it is described
Motor 9 is energized to transmission device 11, runs transmission device, and the transmission gear rotation on transmission device drives driving cog wheel rim
Rotation, to drive barrel body rotation, the structure of the rotational structure is simple, easy to operate, can further ensure reaction in cylinder
Progress.
Embodiment 3
Based on the above embodiment 1, the trapezoidal shape in 5 section of combustion platform is greater than close close to the length of cylinder inboard wall
The length of cylinder hollow space, the preferably length of combustion platform are 5m-6m, are highly 300mm-500mm, further, combustion platform leans on
Nearly kiln tail one end is oblique, and convenient for guiding to material on combustion platform, one end close to kiln hood is in a vertical shape, convenient for calcined
The output of material.
As a preferred embodiment, drainage lid 15 is installed on the burner 1, the drainage lid 15 is in loudspeaker
Shape, loudspeaker open end are slightly larger than burner port, and loudspeaker open end diameter is less than cylinder internal diameter；There is drainage lid drainage to make
With, keep combustion gas fully dispersed, convenient for control kiln hood lid front end temperature, so that temperature at combustion platform is maintained at 500-900 DEG C, make to fill
Divide desulfurization and transformation of crystal, calcination temperature is maintained at 860 ~ 950 DEG C at lifting blade, guarantees that particle is sufficiently grown up into anatase titanium dioxide
Powder.Further, it is provided with discharge port 16 below the kiln hood lid 2, is discharged convenient for anatase thpe white powder；8 upper end of kiln tail case
It is provided with exhanst gas outlet 6, it is further convenient for flue gas discharge；Preferably, the kiln tail case 8 is provided with filter close to 4 one end of cylinder
Net, the feeding port of the feed device 7 pass through strainer and material are sent into inside cylinder 4, avoid material from entering the influence of kiln tail case and forge
Burn operation.
In above-mentioned all embodiments, the diameter of the calciner plant rotary kiln of the utility model is 3.6m, long 48m, inclination
Degree is 4%-6%, and cylinder is rolled by carbon steel sheet, and cylinder inboard wall is provided with insulating layer, and insulating layer is spread by 300mm alumina firebrick
If forming.In order to guarantee to calcine effect in kiln, the drainage lid 15, combustion platform 5 and lifting blade 3 are made of heat-resisting material,
Combustion platform and lifting blade are arranged on insulating layer；Insulating layer can be avoided temperature diffusion and be lost, and guarantee calcination temperature, and can drop
Low cylinder external temperature, avoids external temperature excessively high, influences operating personnel's operation.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (8)
1. a kind of rotary kiln for producing anatase thpe white powder, which is characterized in that including in kiln hood lid (2), kiln tail case (8) and inside
Empty cylinder (4) is provided with burner (1) on the kiln hood lid (2), is provided on the kiln tail case feed device (7), described
The internal middle part of cylinder (4) is equipped with combustion platform (5), is set on cylinder (4) inner wall between the combustion platform (5) and burner (1)
Several lifting blades (3) are equipped with, the lifting blade (3) is axially uniformly arranged along cylinder (4).
2. the rotary kiln of production anatase thpe white powder as described in claim 1, which is characterized in that cylinder (4) outer wall is set
It is equipped with rotational structure, the rotational structure includes idler wheel (14) and driving cog wheel rim (12), and the idler wheel (14) passes through tugboat group
(13) it is supported and fixed on ground or bracket, the driving cog wheel rim (12) is nibbled with the transmission gear (11) on transmission device (10)
It closes, the transmission device (10) can drive cylinder (4) to rotate.
3. the rotary kiln of production anatase thpe white powder as described in claim 1, which is characterized in that cylinder (4) inclination is set
It sets, the height of the kiln hood is lower than the height of kiln tail.
4. the rotary kiln of production anatase thpe white powder as described in claim 1, which is characterized in that combustion platform (5) section
Trapezoidal shape, it is oblique close to kiln tail one end, it is in a vertical shape close to kiln hood one end.
5. the rotary kiln of production anatase thpe white powder as described in claim 1, which is characterized in that below the kiln hood lid (2)
It is provided with discharge port (16), kiln tail case (8) upper end is provided with exhanst gas outlet (6).
6. the rotary kiln of production anatase thpe white powder as described in claim 1, which is characterized in that pacify on the burner (1)
(15) are covered equipped with drainage, (15) flare is covered in the drainage.
7. the rotary kiln of production anatase thpe white powder as described in claim 1, which is characterized in that the kiln tail case (8) is close
Cylinder (4) one end is provided with strainer, and the feeding port of the feed device (7) passes through strainer and material is sent into cylinder (4) inside.
8. the rotary kiln of production anatase thpe white powder as described in claim 1, which is characterized in that cylinder (4) inner wall is equal
Even to be provided with insulating layer, the insulating layer is laid with by refractory brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920043031.3U CN209481197U (en) | 2019-01-11 | 2019-01-11 | A kind of rotary kiln producing anatase thpe white powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920043031.3U CN209481197U (en) | 2019-01-11 | 2019-01-11 | A kind of rotary kiln producing anatase thpe white powder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361350A (en) * | 2020-11-13 | 2021-02-12 | 新中天环保股份有限公司 | Rotary kiln for hazardous waste incineration |
| CN115406227A (en) * | 2022-08-30 | 2022-11-29 | 江苏炬烽热能科技有限公司 | Temperature partition type calcining device suitable for various materials |
| CN115823866A (en) * | 2023-01-09 | 2023-03-21 | 河北远大中正生物科技有限公司 | Rotary kiln for production and production method thereof |
-
2019
- 2019-01-11 CN CN201920043031.3U patent/CN209481197U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361350A (en) * | 2020-11-13 | 2021-02-12 | 新中天环保股份有限公司 | Rotary kiln for hazardous waste incineration |
| CN115406227A (en) * | 2022-08-30 | 2022-11-29 | 江苏炬烽热能科技有限公司 | Temperature partition type calcining device suitable for various materials |
| CN115823866A (en) * | 2023-01-09 | 2023-03-21 | 河北远大中正生物科技有限公司 | Rotary kiln for production and production method thereof |
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