CN117383604A - Preparation method for preparing submicron-sized barium sulfate by taking BaS as barium source without filtering - Google Patents
Preparation method for preparing submicron-sized barium sulfate by taking BaS as barium source without filtering Download PDFInfo
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- CN117383604A CN117383604A CN202311424894.2A CN202311424894A CN117383604A CN 117383604 A CN117383604 A CN 117383604A CN 202311424894 A CN202311424894 A CN 202311424894A CN 117383604 A CN117383604 A CN 117383604A
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- bas
- barium sulfate
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 title claims abstract description 101
- 238000001914 filtration Methods 0.000 title claims abstract description 21
- 229910052788 barium Inorganic materials 0.000 title claims abstract description 18
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 55
- 239000002245 particle Substances 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 28
- 239000007921 spray Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 230000032683 aging Effects 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 13
- 238000001035 drying Methods 0.000 abstract description 9
- 238000001556 precipitation Methods 0.000 abstract description 9
- 238000001694 spray drying Methods 0.000 abstract description 6
- 239000010419 fine particle Substances 0.000 abstract description 4
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 241000565357 Fraxinus nigra Species 0.000 description 27
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000009826 distribution Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- CJDPJFRMHVXWPT-UHFFFAOYSA-N barium sulfide Chemical compound [S-2].[Ba+2] CJDPJFRMHVXWPT-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 2
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 2
- 229910001626 barium chloride Inorganic materials 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/462—Sulfates of Sr or Ba
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- 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
-
- 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 invention relates to the technical field of barium sulfate preparation, and discloses a preparation method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtering, which is characterized by comprising the following steps: s1, preparing 60-150 mL of BaS solution with the concentration of 0.1-3.6 mol/L; s2, preserving heat of the BaS solution prepared in the step S1, and stirring; s3, weighing 0.2 to 2.5mol H 2 O 2 Added to the BaS solution in step S2. The preparation method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtering adopts a homogeneous precipitation method to prepare BaSO 4 The homogeneous precipitation method can avoid the phenomenon of uneven local concentration of the system caused by directly adding the precipitant, can control the generation speed of the precipitant, and further can control the growth speed of particles, and the prepared powder has uniform granularity and is submicron particles, and the slurry is dried by adopting a spray drying process, so that the powder clusters in the traditional drying process are well avoidedThe polymerization problem is that the barium sulfate powder with high purity and fine particle size can be directly obtained after spray drying.
Description
Technical Field
The invention relates to the technical field of barium sulfate preparation, in particular to a preparation method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtering.
Background
The industrial method for preparing the barium sulfate mainly adopts a mirabilite-black ash method, and the prepared barium sulfate product has wide particle size distribution (average particle size of about 10 mu m) and low purity, so that the product performance is difficult to be well exerted. The method for preparing the nano-particles in small batch mainly comprises a direct precipitation method, a sulfuric acid precipitation method, a solution crystallization method, a complexation precipitation method and the like.
In the prior artThe industrial method for preparing the barium sulfate mainly comprises the following basic processes of mirabilite-black ash method: mixing natural barium sulfate and pulverized coal at a certain ratio, pulverizing, roasting in rotary kiln at 1100 deg.C to obtain black ash (BaS), dissolving in water to obtain barium sulfide solution, and mixing barium sulfide and nitrate water solution (Na 2 SO 4 ) The mass concentration of the barium sulfate powder is adjusted to be about 130-160 g/L and 120-122 g/L, then the barium sulfate powder is mixed in a compounding tank according to a certain proportion, the mixture is heated to 90 ℃ for double decomposition reaction to reach an equivalent point or when barium sulfide is slightly excessive, the reaction is ended, the mixture is aged about L h, the obtained barium sulfate slurry and a byproduct sodium sulfide solution are subjected to solid-liquid separation, and then the barium sulfate slurry is dried to obtain a barium sulfate product prepared from powder, the particle size distribution is wide (the average particle size is about 10 mu m), the purity is not high, the product performance is difficult to be well exerted, the method for preparing the barium sulfate powder is a direct precipitation method, the crystal nucleus development and the grain growth process cannot be controlled, the prepared powder has large particle size and wide distribution range, and in the filtering and drying processes, agglomeration among powder particles also causes the problem of coarse particle size, and in order to solve the problem of industrial production, a large amount of laboratory researches such as a direct precipitation method are developed: ethanol is used as a dispersing agent, barium chloride and sodium sulfate are used as raw materials, nano barium sulfate can be prepared, but the particle size distribution interval of the product is too wide, and the method cannot be applied to industries with high uniformity requirements, such as a sulfuric acid precipitation method: the method takes sulfuric acid and barium sulfide as raw materials and reacts in a closed reactor, and the scheme can prepare the barium sulfate with the granularity of 2-20 microns, but the granularity is too coarse, and the particle size distribution range is very wide, such as a solution crystallization method: weighing a certain amount of barium sulfate powder, dissolving the barium sulfate powder into hot concentrated sulfuric acid, and diluting the concentration of the concentrated sulfuric acid in the solution to prepare nano-scale barium sulfate with uniform particle size distribution, wherein the concentrated sulfuric acid is used in the raw materials, so that the safety is poor, and the method is as follows: EDTA is used as complexing agent to prepare nano-level barium sulfate, but the product purity is low, and the nano-level barium sulfate can also be prepared by using a novel reaction device, for example, the super gravity method is a novel technology for strengthening the reaction process by utilizing multiphase flow transmission, and the method can reduce the phenomenon of local supersaturation in solution and inhibit the phenomenonThe growth rate of the crystal grains is produced, and the barium sulfate product with small and uniform grain size is prepared, and the micro-reactor method is adopted: the micro-reactor is a three-dimensional structural element, and the micro-processing technology is used, wherein the channel of the micro-reactor is nano-scale barium sulfate and anhydrous sodium sulfate solution, nitrogen is used as carrier gas, and nano-scale barium sulfate can be prepared after reaction, and the method is as follows: barium sulfate is prepared by preparing barium chloride and sodium sulfate solution, controlling the same flow and injecting the barium sulfate precipitate prepared by a reactor, and performing operations such as centrifugation, washing, drying and the like, but when the barium sulfate is prepared by using a super gravity method, a micro reactor method and an impinging stream-rotating packed bed method, the yield is low, the method is not suitable for industrial batch production, in the preparation method, after the barium sulfate precipitate is prepared, the barium sulfate precipitate needs to be filtered and washed for multiple times, labor hour and energy are consumed, the product purity is limited, and in the subsequent drying process, powder is easy to agglomerate to cause coarse granularity, so the preparation method for preparing submicron barium sulfate by taking BaS as a barium source without filtering is provided.
Disclosure of Invention
(one) solving the technical problems
The invention aims to solve the problems that the prepared barium sulfate has a too wide particle size distribution range, cannot be applied to industries with high uniformity requirements, uses raw material sulfuric acid with poor safety, has low production yield, is not suitable for industrial batch production and requires filtration and washing, and takes time and labor, and provides a preparation method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtration.
(II) technical scheme
The technical scheme for solving the technical problems is as follows:
the preparation method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtration is characterized by comprising the following steps:
s1, preparing 60-150 mL of BaS solution with the concentration of 0.1-3.6 mol/L;
s2, preserving heat of the BaS solution prepared in the step S1, and stirring;
s3, weighing 0.2 to 2.5mol H 2 O 2 Added to step S2Continuously stirring the solution in the BaS solution;
s4, aging the solution in the step S3, and adding the prepared slurry into a bin of a high-speed centrifugal spray dryer after the aging is finished;
s5, starting the high-speed centrifugal spray dryer in the step S4, and collecting powder at a discharge hole to obtain submicron-sized barium sulfate powder with the average particle size of 0.3-0.6 microns.
On the basis of the technical scheme, the invention can be improved as follows.
Further, in the step S2, heat preservation and stirring are carried out through a water bath kettle, wherein the temperature of the heat preservation water bath is 30-100 ℃, and the stirring rotating speed is 30-500 r/min.
Further, in step S3, H 2 O 2 The effective content of the aqueous solution is 27.5% -70%.
Further, the stirring time period in the step S3 is 10 to 100 minutes, and the heating is stopped after the stirring is completed.
Further, in step S3, H 2 O 2 And the amount of BaS material is in the ratio range of 3:1 to 5:1.
Further, the aging time in step S4 is 0.1 to 6 hours.
Further, in the step S5, the inlet temperature of the spray dryer is set between 150 and 350 degrees, and the outlet temperature is set between 60 and 120 degrees.
(III) beneficial effects
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
1. the raw material BaS used in the invention is directly derived from the heavy-rock ore enterprises, so that the heavy-rock ore can be developed and utilized with high added value;
2. the invention adopts a homogeneous precipitation method to prepare the BaSO 4 The homogeneous precipitation method can avoid the phenomenon of uneven local concentration of the system caused by directly adding the precipitant, can control the generation speed of the precipitant, and further can control the growth speed of particles to prepare the granularity of the powderEven, submicron particles are adopted, meanwhile, a spray drying process is adopted to dry the slurry, the problem of powder agglomeration in the traditional drying process is well avoided, and the barium sulfate powder with high purity and fine particle size can be directly obtained after spray drying;
3. the filtering process is not needed, the process flow is greatly shortened, and the agglomeration problem caused by filtering and drying in the traditional process is solved.
Drawings
FIG. 1 is a flow chart of a method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtering.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the preparation method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtration comprises the following steps:
s1, preparing 60-150 mL of BaS solution with the concentration of 0.1-3.6 mol/L;
s2, carrying out heat preservation on the BaS solution prepared in the step S1, stirring, and carrying out heat preservation and stirring through a water bath kettle, wherein the temperature of the heat preservation water bath is 30-100 ℃, the stirring speed is 30-500 r/min, and meanwhile, the heat preservation method is not limited to water bath heat preservation, so long as the temperature of a reaction system can be maintained between 30 and 100 ℃;
s3, weighing 0.2 to 2.5mol H 2 O 2 Adding into the BaS solution in the step S2, continuously stirring, H 2 O 2 The effective content of the aqueous solution is 27.5 to 70 percent, the stirring time is 10 to 100 minutes, the heating is stopped after the stirring is finished, and H 2 O 2 And the amount of BaS material is in the ratio range of 3:1 to 5:1;
s4, aging the solution in the step S3, and adding the prepared slurry into a storage bin of a high-speed centrifugal spray dryer after the aging is finished, wherein the aging time is 0.1-6 hours, and the slurry can be dried by using a pressure type spray dryer and an airflow type spray dryer;
s5, starting the high-speed centrifugal spray dryer in the step S4, collecting powder at a discharge hole, namely obtaining submicron-sized barium sulfate powder with the average particle size of 0.3-0.6 microns, setting the inlet temperature of the spray dryer between 150 and 350 ℃ and the outlet temperature between 60 and 120 ℃.
The barium sulfate product prepared by the traditional method mirabilite-black ash method has the problems of wide particle size distribution, large average particle size, low purity and the like. The prior art has more or less defects, and can not be well applied to industrial mass production of barium sulfate powder with narrow submicron particle size distribution. Based on the method, the invention takes the raw material BaS used in industrial production as a barium source and utilizes S in the BaS 2- By H 2 O 2 Is an oxidizing agent, wherein the reactions involved are: bas+4h 2 O 2 ＝BaSO 4 +4H 2 O. The technical scheme is different from the traditional method mirabilite-black ash method in that:
the invention is realized by S in BaS 2- And H 2 O 2 S in (2) 2- Performing oxidation-reduction reaction to generate SO 4 2- Generated SO 4 2- The concentration can be controlled by adjusting the concentration of the reactant or the parameters of the reaction conditions, SO that the slow generation of SO by regulating the oxidation-reduction reaction can be realized 4 2- Is to adjust the speed of the BaSO 4 Reaction rate of precipitate formation, and avoid Ba in the conventional method 2+ And SO 4 2- The problem of abnormal growth of crystal grains caused by overlarge local concentration brought by direct participation reaction. SO is realized by regulating and controlling technological parameters 4 2- The conditions of homogeneous precipitation are slowly met, and homogeneous nucleation of barium sulfate is realized, so that the barium sulfate powder prepared by the method has the advantages of fine particle size (0.3-0.6 microns), normal particle size distribution and narrow particle size range, and can well solve the industrial practical problem. Only need to dry and removeThe barium sulfate with high purity can be obtained by the water in the reaction product. Compared with the prior art, the invention has the following advantages: firstly, the raw material BaS is the raw material used in industrial production, and can directly utilize the heavy-crystal ore source; secondly, the slurry obtained by the reaction can directly obtain barium sulfate powder with high purity and fine particle size by a spray drying process; thirdly, the spray drying process can well avoid the problem of powder agglomeration in the traditional drying process; fourthly, the process is simple, and the production can be carried out on the original production line of enterprises.
In the first embodiment, the water bath temperature is controlled at 30 ℃, 100mL of 0.5mol/LBaS solution is prepared, the BaS solution is stirred at a constant speed in a water bath kettle, heated and kept at a constant temperature, the rotating speed is set at 150r/min, and 0.2mol of H is weighed 2 O 2 ，H 2 O 2 Adding an aqueous solution with the effective content of 27.5% into the BaS solution, continuously stirring for 10 minutes, stopping stirring, aging for 30 minutes, drying the slurry by a centrifugal spray dryer, setting the inlet temperature of the spray dryer at 150 ℃ and the outlet temperature at 60 ℃, and obtaining the barium sulfate powder with the average particle size of 0.359 microns.
In the second example, the water bath temperature is controlled at 100 ℃, 100mL of BaS solution with the concentration of 3.6mol/L is prepared, the BaS solution is stirred at a constant speed in a water bath kettle, heated and kept at a constant temperature, the rotating speed is set at 250r/min, and 1.44mol of H is weighed 2 O 2 ，H 2 O 2 Adding an aqueous solution with the effective content of 70% into the BaS solution, continuously stirring for 30 minutes, stopping stirring, aging for 30 minutes, drying the slurry by a centrifugal spray dryer, setting the inlet temperature of the spray dryer at 350 ℃ and the outlet temperature at 120 ℃, and obtaining the barium sulfate powder with the average particle size of 0.591 microns.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The preparation method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtration is characterized by comprising the following steps:
s1, preparing 60-150 mL of BaS solution with the concentration of 0.1-3.6 mol/L;
s2, preserving heat of the BaS solution prepared in the step S1, and stirring;
s3, weighing 0.2 to 2.5mol H 2 O 2 Adding the mixture into the BaS solution in the step S2, and continuously stirring;
s4, aging the solution in the step S3, and adding the prepared slurry into a bin of a high-speed centrifugal spray dryer after the aging is finished;
s5, starting the high-speed centrifugal spray dryer in the step S4, and collecting powder at a discharge hole to obtain submicron-sized barium sulfate powder with the average particle size of 0.3-0.6 microns.
2. The method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtration according to claim 1, wherein in the step S2, heat preservation and stirring are carried out through a water bath kettle, wherein the temperature of the heat preservation water bath is 30-100 ℃, and the stirring rotating speed is 30-500 r/min.
3. The method for preparing submicron-sized barium sulfate by taking BaS as barium source without filtration according to claim 1, wherein in step S3, H 2 O 2 The effective content of the aqueous solution is 27.5% -70%.
4. The method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtration according to claim 1, wherein the stirring time in the step S3 is 10-100 minutes, and heating is stopped after the stirring is finished.
5. The method for preparing submicron-sized barium sulfate by taking BaS as barium source without filtration according to claim 1, wherein in step S3, H 2 O 2 And the amount of BaS material is in the ratio range of 3:1 to 5:1.
6. The method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtering according to claim 1, wherein the aging time in the step S4 is 0.1-6 hours.
7. The method for preparing submicron-sized barium sulfate by taking BaS as a barium source without filtration according to claim 1, wherein in the step S5, the inlet temperature of the spray dryer is set between 150 and 350 degrees, and the outlet temperature is set between 60 and 120 degrees.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311424894.2A CN117383604A (en) | 2023-10-31 | 2023-10-31 | Preparation method for preparing submicron-sized barium sulfate by taking BaS as barium source without filtering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311424894.2A CN117383604A (en) | 2023-10-31 | 2023-10-31 | Preparation method for preparing submicron-sized barium sulfate by taking BaS as barium source without filtering |
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| CN117383604A true CN117383604A (en) | 2024-01-12 |
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| CN202311424894.2A Pending CN117383604A (en) | 2023-10-31 | 2023-10-31 | Preparation method for preparing submicron-sized barium sulfate by taking BaS as barium source without filtering |
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- 2023-10-31 CN CN202311424894.2A patent/CN117383604A/en active Pending
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