CN109019648A - Deacidification furnace, alumina powder deacidifying process - Google Patents
Deacidification furnace, alumina powder deacidifying process Download PDFInfo
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- CN109019648A CN109019648A CN201811173712.8A CN201811173712A CN109019648A CN 109019648 A CN109019648 A CN 109019648A CN 201811173712 A CN201811173712 A CN 201811173712A CN 109019648 A CN109019648 A CN 109019648A
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- furnace body
- body section
- furnace
- deacidification
- alumina powder
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/46—Purification of aluminium oxide, aluminium hydroxide or aluminates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The present invention relates to a kind of deacidification furnaces, comprising: the first furnace body section, the second furnace body section and the third furnace body section set gradually from top to bottom；Wherein, the inside of the first furnace body section is equipped with filter plate, and the first furnace body section is separated into the first cavity and the second cavity by filter plate from top to bottom；First cavity is equipped with offgas outlet, and the second cavity is equipped with feed inlet；Second furnace body section is equipped with steam entry；Third furnace body section is equipped with hot air inlet, and the end of third furnace body section is equipped with discharge port.Above-mentioned deacidification furnace is divided into three different furnace body sections, steam entry is located at the second furnace body section, hot air inlet is located at third furnace body section, steam entry and hot air inlet are separately positioned on to different furnace body sections, so that depickling and ultimate drying separately carry out, alumina powder drying can be made more abundant, obtained powder quality is preferable.
Description
Technical field
The present invention relates to deacidifying process technical fields, more particularly to a kind of deacidification furnace, alumina powder deacidifying process.
Background technique
The characteristic that vapor phase method aluminium oxide has high-specific surface area, good dispersion, surface positively charged, is widely used in saving
The fields such as energy lamp, papermaking, film preparation, powdery paints.Vapor phase method alumina powder surface is attached with hydrogen chloride, such as mass fraction
PH value for 4% vapor phase method alumina fluid dispersion limits aluminium oxide application space with stronger acidity in 4.5-5.5
Expansion.Therefore, depickling is the important link in the production of vapor phase method alumina powder.
Common acid stripping method has hot-air that alcohol method, hot-air is added to add amine method, heated dry air method, damp-heat air method, decompression
Vibratory liquefaction method etc..Hot-air adds alcohol method and hot-air to add amine method that can introduce impurity group in powder surface, influences aluminium oxide
Energy.Heated dry air method needs higher depickling temperature and longer depickling time, and pH value is difficult to reach requirement.Damp-heat air method and subtract
Press vibratory liquefaction method that there is similar depickling principle, depickling temperature is low, not will increase impurity, and work efficiency is high, therefore both
Technique is common two kinds of acid stripping methods in production.
In traditional damp-heat air method deacidification process, the dry insufficient problem of alumina powder often occurs, in turn
Cause alumina powder that secondary agglomeration occurs, the product cut size after leading to depickling is larger.
Summary of the invention
Based on this, it is necessary to be asked in traditional damp-heat air method deacidification process, alumina powder drying is insufficient
Topic, provides a kind of deacidification furnace.
A kind of deacidification furnace, comprising: the first furnace body section, the second furnace body section and the third furnace body set gradually from top to bottom
Section；Wherein, the inside of the first furnace body section is equipped with filter plate, and the filter plate separates the first furnace body section from top to bottom
At the first cavity and the second cavity；First cavity is equipped with offgas outlet, and second cavity is equipped with feed inlet；Described second
Furnace body section is equipped with steam entry；The third furnace body section is equipped with hot air inlet, and the end of the third furnace body section is equipped with
Material mouth.
Above-mentioned technical proposal at least has following technical effect that deacidification furnace is divided into three different furnace body sections, alumina powder
Body is added in deacidification furnace from the feed inlet of the second cavity being located in the first furnace body section, using powder itself sedimentation successively
By the second furnace body section and third furnace body section, depickling and drying are completed.Steam entry is located at the second furnace body section, hot air inlet
Positioned at third furnace body section, steam entry and hot air inlet are separately positioned on to different furnace body sections, so that depickling and ultimate
It is dry separately to carry out, alumina powder drying can be made more abundant, obtained powder quality is preferable.First furnace body section was equipped with
Filter plate can prevent the powder in mixed gas to be discharged.After mixed gas first drains into pickling and alkaline cleaner from offgas outlet, then
It is discharged into atmosphere.Discharge port is set to the end of third furnace body section, can directly connect with transmission device, rapidly collect powder.
Above-mentioned technical proposal is described further below.
The first furnace body section, the second furnace body section and the third furnace body Duan Jun in one of the embodiments,
For cylindrical shape, and the diameter of the first furnace body section is greater than the diameter of the second furnace body section, the diameter of the second furnace body section
Greater than the diameter of the third furnace body section.
The week of connection changeover portion between the first furnace body section and the second furnace body section in one of the embodiments,
It is gradually reduced to size.
The week of connection changeover portion between the second furnace body section and the third furnace body section in one of the embodiments,
It is gradually reduced to size.
The discharge port is since the end of the third furnace body section in one of the embodiments, and the discharge port
The end of circumferential size from the third furnace body section be gradually increased.
The filter plate is installed on institute by being fixed on the connector of the first furnace body section in one of the embodiments,
State the inside of the first furnace body section.
The filter plate has multiple through-holes through the filtering plate thickness direction in one of the embodiments,.
The filter plate is arranged to conical surface on the surface of first cavity in one of the embodiments,.
The first furnace body section, the second furnace body section and the third furnace body section in one of the embodiments,
Outside is enclosed with thermal insulation material.
The present invention also provides a kind of alumina powder deacidifying process.
A kind of alumina powder deacidifying process, using described in any item deacidification furnaces as above, the technique includes following step
It is rapid: vapor and hot-air being each led by steam entry and hot air inlet, preheated for deacidification furnace；It will by feed inlet
Alumina powder is added in the first furnace body section, alumina powder sedimentation and successively after the second furnace body section and third furnace body section
It is discharged from discharge port, vapor is passed through into the second furnace body section in alumina powder infall process, to third furnace body Duan Zhongtong
Enter hot-air.
Above-mentioned technical proposal at least has following technical effect that alumina powder deacidifying process using above-mentioned deacidification furnace, water
Vapour inlet is located at the second furnace body section, and hot air inlet is located at third furnace body section, and steam entry and hot air inlet are distinguished
Different furnace body sections is set, so that depickling and ultimate drying separately carry out, alumina powder drying can be made more abundant.First
Be passed through vapor and hot-air, preheat deacidification furnace first, then by alumina powder from be located at the first furnace body section in the second chamber
The feed inlet of body is added in deacidification furnace, successively passes through the second furnace body section and third furnace body section using the sedimentation of powder itself, complete
At depickling and drying.First furnace body section is equipped with filter plate, and the powder in mixed gas can be prevented to be discharged.Mixed gas is from tail gas
After outlet first drains into pickling and alkaline cleaner, then it is discharged into atmosphere.Discharge port be set to third furnace body section end, can directly with biography
It send device to connect, rapidly collects powder.
Detailed description of the invention
Fig. 1 is one embodiment of the invention deacidification furnace structural schematic diagram；
Fig. 2 is one embodiment of the invention alumina powder deacidifying process flow chart.
Wherein: 100, deacidification furnace 120, the first furnace body section 122, the first cavity
124, the second cavity 126, offgas outlet 128, feed inlet
129, connector 130, the second furnace body section 132, steam entry
140, third furnace body section 142, hot air inlet 150, filter plate
160, discharge port
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited by the specific embodiments disclosed below.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term used in the description herein is intended merely to description specific embodiment
Purpose, it is not intended that in limitation the present invention.Term " and or " used herein includes one or more relevant institute's lists
Any and all combinations of purpose.
Applicants have found that: traditional damp-heat air method deacidification equipment, vapor and hot-air are same from identical import
When be passed into deacidification equipment, the depickling and drying of alumina powder carry out simultaneously so that alumina powder drying it is insufficient, hold
Secondary agglomeration easily occurs, the product cut size after leading to depickling is larger.
For this purpose, alumina powder can be made dry referring to FIG. 1, one embodiment of the invention provides a kind of deacidification furnace 100
More sufficiently.Deacidification furnace 100 includes: the first furnace body section 120, the second furnace body section 130 and third set gradually from top to bottom
Furnace body section 140.Wherein, the inside of the first furnace body section 120 is equipped with filter plate 150, and filter plate 150 is by the first furnace body section 120 from upper
The first cavity 122 and the second cavity 124 are separated under；First cavity 122 is equipped with offgas outlet 126, and the second cavity 124 is equipped with
Feed inlet 128；Second furnace body section 130 is equipped with steam entry 132；Third furnace body section 140 is equipped with hot air inlet 142, third
The end of furnace body section 140 is equipped with discharge port 160.
The depickling principle of damp-heat air method depickling is that vapor and hot-air are passed into deacidification furnace, will using vapor
The hydrogen chloride removing of the surface attachment of alumina powder recycles hot-air that the alumina powder for being attached with vapor is dry,
Alumina powder after obtaining depickling.
In the present embodiment, deacidification furnace 100 divides for three different furnace body sections, respectively the first furnace body section 120, the second furnace body
Section 130 and third furnace body section 140.First furnace body section 120 is used as segregation section, offgas outlet of the hydrogen chloride from the first furnace body section 120
126 discharges are then exhausted from atmosphere after can draining into pickling and alkaline cleaner neutralization.Second furnace body section 130 is used as Hybrid Heating section, if
There is steam entry 132, after being passed through vapor, the hydrogen chloride on alumina powder surface can be effectively removed, and vapor has
There is certain temperature, to guarantee the temperature in deacidification furnace 100, carries out depickling and preliminarily dried.Third furnace body section 140 is empty as heat
Gas bringing-up section, hot-air can play good desiccation to alumina powder.Second furnace body section 130 and third furnace body section
140 can be improved heating efficiency, and the hot-air of lower temperature can be realized the drying of alumina powder, not need additional heating
Device reduces energy consumption.Steam entry 132 and hot air inlet 142 are set up separately in different positions, can separate and be taken off
Acid and drying, and final alumina powder is dried via hot-air, can obtain the higher alumina powder of degree of drying,
Prevent alumina powder from secondary agglomeration occurs, to obtain the lesser product of partial size.
In addition, feed inlet 128, which is set to the first furnace body section 120, is sequentially completed depickling using the sedimentation of alumina powder itself
And drying steps, internal structure is simpler, completes without other structures auxiliary.Filter plate 150 can will be mixed in hydrogen chloride, water
Alumina powder in the gases such as steam intercepts, and stays it in deacidification furnace 100, preventing from following mixed gas that deacidification furnace is discharged
100.Discharge port 160 is set to end of the third furnace body section 140 far from the second furnace body section 130, and alumina powder is directly from discharge port
160 discharges, transmission device, such as conveyer belt can be set below discharge port 160, directly alumina powder is collected and turned
It moves, it is not necessary to be set to the side wall of furnace body as traditional way, need complicated collection device.
Above-mentioned technical proposal at least has following technical effect that deacidification furnace 100 divides for three different furnace body sections, aluminium oxide
Powder is added in deacidification furnace 100 from the feed inlet 128 for the second cavity 124 being located in the first furnace body section 120, utilizes powder
The second furnace body section 130 and third furnace body section 140 are successively passed through in the sedimentation of itself, complete depickling and drying.Steam entry 132
In the second furnace body section 130, hot air inlet 142 is located at third furnace body section 140, by steam entry 132 and hot air inlet 142
It is separately positioned on different furnace body sections, so that depickling and ultimate drying separately carry out, alumina powder drying can be made more to fill
Point, obtained powder quality is preferable.First furnace body section 120 is equipped with filter plate 150, can prevent the powder in mixed gas from arranging
Out.After mixed gas first drains into pickling and alkaline cleaner from offgas outlet 126, then it is discharged into atmosphere.Discharge port 160 is set to third furnace
The end of body section 140 can directly connect with transmission device, rapidly collect powder.
In some embodiments, the first furnace body section 120, the second furnace body section 130 and third furnace body section 140 are cylinder
Shape, and the diameter of the first furnace body section 120 is greater than the diameter of the second furnace body section 130, the diameter of the second furnace body section 130 is greater than third furnace
The diameter of body section 140.First furnace body section 120, the second furnace body section 130 and third furnace body section 140 are set as cylindric, and diameter successively subtracts
It is small, it is therefore an objective to prevent alumina powder from descending slowly and lightly everywhere, the radial path for drifting it reduces, and improves the collection of alumina powder
Rate.In addition, the length of the second furnace body section 130 and third furnace body section 140 is longer, the axial path of alumina powder can be increased,
The time of contact for increasing vapor and hot-air and alumina powder, alumina powder is enable to fill within the relatively short time
Divide depickling and drying.Certainly, the first furnace body section 120, the second furnace body section 130 and third furnace body section 140 can also be other
Shape, for example, hollow square or rectangular, not by being limited in the present embodiment.
In some embodiments, the circumferential size of the connection changeover portion between the first furnace body section 120 and the second furnace body section 130
It is gradually reduced.Equally, the circumferential size of the connection changeover portion between the second furnace body section 130 and third furnace body section 140 also gradually subtracts
It is small.It is arranged such, on the one hand, from the appearance the structure of entire deacidification furnace 100 is more coordinated, and connection changeover portion is rounder and more smooth.
On the other hand, connection changeover portion is oblique, convenient for collecting alumina powder, keeps it more along inclined connection changeover portion
Quickly settle.
In some embodiments, discharge port 160 is since the end of third furnace body section 140, and the circumferential ruler of discharge port 160
The very little end from third furnace body section 140 is gradually increased.Discharge port 160 has certain length, and circumferential size is gradually increased, example
Such as, discharge port 160 is in a circular table shape, and the diameter of side wall is gradually increased.Relative to it is traditional by discharge port be designed to circumferential size by
Decrescence small shape can reduce 160 blockage problem of discharge port, meanwhile, after alumina powder natural subsidence, it is easy accumulation and is formed
It is similar cone-shaped, the circumferential size of discharge port 160 is designed to the trend being gradually increased, meets physics sedimentation principle, Neng Goufang
It sets and collects more alumina powders.
In some embodiments, filter plate 150 is installed on first by being fixed on the connector 129 of the first furnace body section 120
The inside of furnace body section 120.The circumferential profile of filter plate 150 and the inner surface contour of the first furnace body section 120 match.As shown in Figure 1,
First furnace body section 120 is separated into two cavitys up and down by filter plate 150, is installed on the first furnace body section 120 by connector 129
Inside, connector 129 are fixed on the end of the first furnace body section 120, that is, in Fig. 1 the first furnace body section 120 top.Connector
129 can be single connecting rod, connect the centre of filter plate 150；It is also possible to multiple connecting rods, uniformly connects filter plate
150；It can also be crozier, catch on filter plate 150.The structure of connector 129 is unrestricted, and connector 129 can also be fixed
In the inner sidewall of the first furnace body section 120.
Further, filter plate 150 has multiple through-holes through 150 thickness direction of filter plate.Filter plate 150 has more
A through-hole through thickness direction, the overall size of the through-hole are less than the particle size of alumina powder, prevent aluminium oxide
Powder is passed through out of through-hole follows mixed gas that deacidification furnace 100 is discharged, but only by mixed gas (hydrogen chloride, vapor etc.)
It is discharged out of through-hole.
Further, surface of the filter plate 150 in the first cavity 122 is arranged to conical surface.It is understood that
Filter plate 150 is arranged to conical surface, can be cone, pyramid.It can also be taper mesa-shaped, such as truncated cone-shaped, terrace with edge
Shape.There is certain tilt angle, more more convenient for alumina powder namely at the relatively close edge contour of filter plate 150
It settles fastly, relative to planar filter plate, quickly alumina powder can be collected, reduce the collection of alumina powder
Time.As shown in Figure 1, the tapered mesa-shaped of filter plate 150, around from center, plane, was then ruler later to filter plate 150 before this
Very little increasing circumferential profile, in certain tilt angle.
In some embodiments, the outside of the first furnace body section 120, the second furnace body section 130 and third furnace body section 140 is wrapped
It is wrapped with thermal insulation material.One layer is enclosed in the outside of the first furnace body section 120, the second furnace body section 130 and third furnace body section 140
The temperature outside of thermal insulation material, the temperature being able to maintain in deacidification furnace 100, thermal insulation material is maintained at 50-55 DEG C.Thermal insulation material can
To be aerosil, precipitated silica, silicoglaserite, vermiculite, glass fibre, quartz glass fibre, boron fibre, ceramics
One or more composition such as fiber can be effectively prevented the loss of 100 heat of deacidification furnace, reduce energy consumption, play good
Heat insulation effect, auxiliary obtain better deacidification effect.
With reference to flow chart shown in Fig. 2, one embodiment of the invention additionally provides a kind of alumina powder deacidifying process, uses
Described in any item deacidification furnaces 100 as above, comprising the following steps:
S100, vapor and hot-air are each led by steam entry and hot air inlet, is preheated for deacidification furnace.
By with certain temperature vapor and hot-air be passed through respectively from steam entry 132 and hot air inlet 142
In deacidification furnace 100, is preheated for deacidification furnace 100, certain depickling temperature is provided.
S200, alumina powder is added in the first furnace body section by feed inlet, alumina powder is settled and successively passed through
The second furnace body section and the discharge of third furnace body Duan Houcong discharge port are crossed, to the second furnace body Duan Zhongtong in alumina powder infall process
Enter vapor, is passed through hot-air into third furnace body section.
Alumina powder is added in deacidification furnace 100 from feed inlet 128, by the effect natural subsidence of itself.Oxidation
Aluminium powder body is fallen via the ultimate drying of third furnace body section 140 from discharge port 160 via 130 depickling of the second furnace body section and preliminarily dried
Enter to be located at the transmission device of 160 lower section of discharge port, such as conveyer belt, the alumina powder after depickling and drying is collected and turned
It moves.Mixed gas (gases such as hydrogen chloride, vapor) rises to the first furnace body section 120 and arranges via filter plate 150 from tail gas port
Deacidification furnace 100 out after can draining into pickling and alkaline cleaner neutralization, then are discharged into atmosphere.
Above-mentioned technical proposal at least has following technical effect that alumina powder deacidifying process uses above-mentioned deacidification furnace 100,
Steam entry 132 is located at the second furnace body section 130, and hot air inlet 142 is located at third furnace body section 140, by steam entry 132
It is separately positioned on different furnace body sections with hot air inlet 142, so that depickling and ultimate drying separately carry out, aluminium oxide can be made
Powder drying is more abundant.It is first passed through vapor and hot-air, preheats deacidification furnace 100 first, then by alumina powder from being located at
The feed inlet 128 of the second cavity 124 in first furnace body section 120 is added in deacidification furnace 100, utilizes the sedimentation of powder itself
Successively pass through the second furnace body section 130 and third furnace body section 140, completes depickling and drying.First furnace body section 120 is equipped with filter plate
150, the powder in mixed gas can be prevented to be discharged.After mixed gas first drains into pickling and alkaline cleaner from offgas outlet 126,
It is discharged into atmosphere again.Discharge port 160 is set to the end of third furnace body section 140, can directly connect with transmission device, rapidly collect
Powder.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of deacidification furnace characterized by comprising
The first furnace body section, the second furnace body section and the third furnace body section set gradually from top to bottom；Wherein,
The inside of the first furnace body section is equipped with filter plate, and the first furnace body section is separated into the by the filter plate from top to bottom
One cavity and the second cavity；First cavity is equipped with offgas outlet, and second cavity is equipped with feed inlet；
The second furnace body section is equipped with steam entry；
The third furnace body section is equipped with hot air inlet, and the end of the third furnace body section is equipped with discharge port.
2. deacidification furnace according to claim 1, which is characterized in that the first furnace body section, the second furnace body section and
The third furnace body section is cylindrical shape, and the diameter of the first furnace body section is greater than the diameter of the second furnace body section, described
The diameter of second furnace body section is greater than the diameter of the third furnace body section.
3. deacidification furnace according to claim 1, which is characterized in that between the first furnace body section and the second furnace body section
The circumferential size of connection changeover portion be gradually reduced.
4. deacidification furnace according to claim 1, which is characterized in that between the second furnace body section and the third furnace body section
The circumferential size of connection changeover portion be gradually reduced.
5. deacidification furnace according to claim 1, which is characterized in that open the end of the discharge port from the third furnace body section
Begin, and the end of the circumferential size of the discharge port from the third furnace body section is gradually increased.
6. deacidification furnace according to claim 1, which is characterized in that the filter plate is by being fixed on the first furnace body section
Connector be installed on the inside of the first furnace body section.
7. deacidification furnace according to claim 1, which is characterized in that the filter plate has multiple through the filtering plate thickness
Spend the through-hole in direction.
8. deacidification furnace according to claim 1, which is characterized in that the filter plate is arranged on the surface of first cavity
Tapered surface.
9. deacidification furnace according to claim 1, which is characterized in that the first furnace body section, the second furnace body section and
The outside of the third furnace body section is enclosed with thermal insulation material.
10. a kind of alumina powder deacidifying process, which is characterized in that use depickling as described in any one of claim 1 to 9
Furnace, the technique the following steps are included:
Vapor and hot-air are each led by steam entry and hot air inlet, is preheated for deacidification furnace；
Alumina powder is added in the first furnace body section by feed inlet, alumina powder settles and successively passes through the second furnace body
Section and the discharge of third furnace body Duan Houcong discharge port, are passed through vapor into the second furnace body section in alumina powder infall process,
Hot-air is passed through into third furnace body section.
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| CN201811173712.8A CN109019648A (en) | 2018-10-09 | 2018-10-09 | Deacidification furnace, alumina powder deacidifying process |
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| CN201811173712.8A CN109019648A (en) | 2018-10-09 | 2018-10-09 | Deacidification furnace, alumina powder deacidifying process |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201882923U (en) * | 2010-10-27 | 2011-06-29 | 信息产业电子第十一设计研究院科技工程股份有限公司 | Deacidifying furnace for production process of white carbon black by adopting gaseous phase method |
| CN102513031A (en) * | 2011-11-30 | 2012-06-27 | 广州吉必盛科技实业有限公司 | Deacidification process and equipment thereof |
| CN209010163U (en) * | 2018-10-09 | 2019-06-21 | 苏州华微特粉体技术有限公司 | Deacidification furnace |
-
2018
- 2018-10-09 CN CN201811173712.8A patent/CN109019648A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201882923U (en) * | 2010-10-27 | 2011-06-29 | 信息产业电子第十一设计研究院科技工程股份有限公司 | Deacidifying furnace for production process of white carbon black by adopting gaseous phase method |
| CN102513031A (en) * | 2011-11-30 | 2012-06-27 | 广州吉必盛科技实业有限公司 | Deacidification process and equipment thereof |
| CN209010163U (en) * | 2018-10-09 | 2019-06-21 | 苏州华微特粉体技术有限公司 | Deacidification furnace |
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