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Pharmaceutical granules typically undergo granulation, drying, and sizing processes. Depending on the manufacturing conditions, the resulting materials may contain particles of different sizes. If the proportion of fine and coarse particles does not meet downstream process requirements, additional challenges may arise in material handling and processing.
1. Influence on Material Flowability
Particle size and particle size distribution can affect the packing, flow, and conveying characteristics of granules. In production processes requiring consistent material feeding, an unsuitable particle size composition may contribute to fluctuations in material discharge.
2. Influence on Blending Uniformity
Particles of different sizes may exhibit different movement characteristics during blending. When particle size differences are significant, the blending process may be affected. Particle size control should therefore be considered together with formulation, particle density, and mixing conditions.
3. Influence on Downstream Pharmaceutical Processing
During tablet compression and capsule filling, particle size distribution may be associated with flowability, filling behavior, and material transfer performance. Appropriate screening can help prepare granules with a particle size distribution suited to the requirements of subsequent processes.
It is important to recognize that particle size uniformity is not the only factor determining pharmaceutical product quality. Formulation, particle density, moisture content, manufacturing processes, and equipment parameters can also influence the final product.
A rotary vibratory sieve separates materials primarily according to particle size and the relationship between particles and screen apertures.
After entering the screening area, materials move across the screen surface under vibration. Particles small enough to pass through the mesh move to the lower screen deck or corresponding discharge outlet, while larger particles remain on the screen surface. This process separates materials into different particle size fractions.
For pharmaceutical granule applications, screening solutions can be planned around the following factors.
Screen Mesh Aperture: Matching the Target Particle Size
Screen mesh aperture directly affects the particle size range that can pass through the screen. During equipment selection, the mesh specification should be determined according to the target particle size, acceptable size variation, and actual particle characteristics. Apertures that are too large or too small may affect classification performance.
Multi-Deck Screens: Supporting Multiple Size Fractions
When production requires several particle size fractions, multiple screen decks can be configured according to the equipment design. Different mesh apertures allow materials to be separated into corresponding size grades for collection and further processing.
Vibration Parameters: Adjusting to Material Characteristics
Particle density, shape, flowability, and moisture content can all influence how materials move across the screen surface. Appropriate adjustments to operating parameters and feeding conditions can help improve material distribution and support consistent screening operation.
Feeding Method: Maintaining an Even Material Distribution
Excessive feeding or localized material accumulation may create an uneven load on the screen surface and reduce effective particle-screen contact. Controlling the feeding rate according to equipment capacity and material characteristics helps maintain a more consistent screening process.
Pharmaceutical granules vary in formulation and granulation processes. As a result, their screening requirements may also differ.
| Material Type | Particle Size Control Focus | Screening Configuration Considerations |
|---|---|---|
| Traditional Chinese medicine granules | Fine-to-coarse particle ratio and particle size distribution | Select suitable screen mesh specifications |
| Pharmaceutical granules for Western medicines | Target particle size range and classification requirements | Match screen aperture to the required size range |
| Granule formulation ingredients | Particle uniformity and fine-particle content | Evaluate the number of screen decks and screening arrangement |
| Fragile pharmaceutical granules | Particle integrity during screening | Consider feeding methods and vibration parameters |
| Production involving multiple particle size specifications | Different product size requirements | Plan screen replacement and equipment configurations |
For fragile granules, simply increasing vibration intensity or extending screening time to improve classification is not necessarily appropriate. Particle strength, equipment operating conditions, and actual processing capacity should all be considered. Screening trials can help determine suitable operating parameters.
Screening equipment should be selected and configured according to the target particle size, material characteristics, and production requirements rather than focusing solely on the number of screen decks or equipment size.
Define the Target Particle Size Range
First, identify the required particle size range and the proportion of fine or oversized particles that needs to be separated. This provides a basis for selecting the appropriate screen mesh specifications.
Evaluate Material Screening Characteristics
Understand the particle shape, density, moisture content, flowability, and fragility of the material. These factors help determine whether auxiliary screen-cleaning devices or other configurations should be considered.
Match Equipment Capacity to Production Requirements
The processing capacity of the screening machine should be coordinated with upstream feeding and downstream production schedules. Excessive feeding may increase the load on the screen surface and affect classification performance. Equipment capacity should therefore be selected according to actual production conditions.
Conduct Screening Trials to Confirm the Configuration
Different pharmaceutical granules may behave differently during screening. Before finalizing equipment selection, manufacturers are advised to provide representative material samples for testing. Screen mesh specifications, operating parameters, screening efficiency, and particle integrity can then be evaluated to support equipment configuration decisions.
Precision screening of pharmaceutical granules requires more than selecting an appropriate screen mesh. Equipment structure, operating parameters, and production processes must also work together.
Gaofu Machinery can provide rotary vibratory sieve selection and configuration recommendations based on material characteristics, target particle size ranges, processing capacity, and site conditions. Screen mesh specifications, the number of screening decks, feeding methods, and auxiliary devices can be evaluated according to specific application requirements.
From fine powder separation and oversized particle removal to multi-fraction particle classification, a properly configured rotary vibratory sieve can help manufacturers optimize the granule screening stage and prepare materials that meet process-specific requirements for subsequent blending, tablet compression, and capsule filling.
Define the target particle size. Match the screen mesh to the material. Evaluate the configuration through practical screening trials.
Gaofu Machinery provides rotary vibratory sieve equipment and screening solution recommendations for pharmaceutical granule classification, based on actual production requirements.
Pharmaceutical Industry Client Testimonials
Dong-E E-Jiao, Harbin Pharmaceutical Group, North China Pharmaceutical,Yangtze River Pharmaceutical Group, Taiji Group, Huadong Medicine,CSPC Group, Northeast Pharmaceutical, Guangzhou Baiyunshan, Tongrentang,Huiren Pharmaceutical, Fosun Pharma, Xiuzheng Pharmaceutical, Lijun Pharmaceutical,Luye Pharma Group, Di'ao Group, TianGongLi, Hengrui Medicine, Jiuzhitang, Jiangzhong Pharmaceutical, Lunan Pharmaceutical, Yunnan Baiyao, Sunflower Pharmaceutical,China Sanjiu Enterprise Group, Sanjin Pharmaceutical, Yiling Pharmaceutical,Wantong Pharmaceutical, Pientzehuang, Ma Yinglong Pharmaceutical, Guangyuyuan,Aodong Pharmaceutical, Besunyen, Jingfukang Pharmaceutical, Furen Pharmaceutical Group,Guizhou Bailing, Conba, Huasu Pharmaceutical, Yifang Pharmaceutical
Fortune 500 Client Testimonials
CNPC、CSCEC、Sinochem Holdings、CRCC、China Minmetals Corporation、CNOOC、CR、Sinopharm、CHN Energy、COFCO Corporation、Huawei Technologies、PowerChina、CITIC Group、Wuchan Zhongda Group、NORINCO、Chalco、CNBM、 Shaanxi Coal and Chemical Industry Group、Ansteel Group、CETC、CSSC、CASC、CEC、Jinchuan Group、CASIC、Conch Cement、CNNC、SPH、Shanxi Coking Coal Group、 Zhongtai Chemical、GPHL、DEC、Sinosteel Corporation、MCC、China National Salt Industry Chemical、China Baowu Steel Group、China Animal Husbandry Industry Co., Ltd.、CECEP
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was founded back in the 1980s. With over 40 years of development, it has been certified as a National-level Specialized, Refined, Unique & Innovative Little Giant Enterprise, National Green Factory, National High-tech Enterprise, and National Intellectual Property Advantage Enterprise, and serves as the President Unit of China Vibration Screening Industry Association.
The company is accredited with the Henan Provincial Industrial Design Center, Henan Provincial Engineering Technology Research Center for Intelligent On-line Screening System, and Xinxiang Municipal Engineering Technology Research Center for Fine Screening.
Gaofu has obtained more than 500 patents including invention patents, utility model patents and design patents, been awarded the Science and Technology Achievement Prize issued by the Ministry of Industry and Information Technology of China, and participated in drafting and formulating 4 national standards.
Gaofu's product portfolio covers multiple series and hundreds of specifications, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment and automatic material handling systems.
Core products include vibrating screens, screening machines, vibratory sifters, rotary vibrating screens, ultrasonic vibrating screens, linear vibrating screens, airflow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeding machines, dust-free feeding stations, bulk bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag-discharging filters, leaf filters, clay filters, toothed roll crushers, coal crushers and other machinery.
These products are widely applied in food, pharmaceutical, chemical, metallurgy, construction materials, mining, thermal power, environmental protection and many other industries, winning recognition and trust from over 10,000 clients worldwide.
Gaofu products enjoy strong sales across Greater China, and are exported to more than 100 countries and regions such as Russia, Canada, the United States, New Zealand, Japan, Brazil and South Africa.
Upholding the corporate mission of Improving material quality & efficiency to fully satisfy customer demands, Gaofu maintains long-term partnerships with clients to achieve win-win development.
At present, Gaofu is an official qualified supplier for numerous Fortune Global 500 enterprises, including CNPC, Sinopec, Sinochem Holdings, China Resources Group, Sinopharm Group, COFCO, China National Building Material, China Aerospace Science and Technology Corporation, Jinchuan Group and more.
Gaofu Machinery ranks No.1 in global sales volume of vibrating screens.
In May 2024, Frost & Sullivan, a world-renowned international consulting firm, issued a Market Position Verification Certificate confirming that Gaofu achieved the world's largest shipment volume of vibrating screens in the global market in 2023.
