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On seasoning production lines, spice powder screening typically faces the following practical problems. If any one of them is not properly handled, it can affect final product quality and line efficiency.
Pain point 1: Many material types, different particle sizes – high classification requirements. Seasoning production covers a wide range of raw materials, such as table salt, monosodium glutamate, chilli powder, onion powder, ginger powder, garlic powder, star anise powder, etc. Some of these materials are powders, some are granules, with particle sizes ranging from a few millimetres down to tens of microns. This places high demands on the adaptability of screening equipment.
Pain point 2: High throughput, continuous operation – the equipment must not "fail". Large‑scale seasoning production plants can process several to several tens of tonnes per day. Raw materials must be accurately proportioned and conveyed to mixing equipment according to strict ratios – a process that requires good flowability and smooth screening of the raw materials. If the screening equipment has insufficient capacity or unstable operation, the efficiency of the entire production line will be directly limited by the screening step.
Pain point 3: Strict food safety requirements – material and sealing are mandatory. Spices are used directly in food, so screening equipment must meet clear hygiene standards. The equipment material must be food‑grade stainless steel, ensuring that material‑contact parts are non‑toxic, corrosion‑resistant and do not cause contamination. The equipment structure must be well sealed to prevent dust escape and foreign matter entry.
These pain points are not isolated but overlap. If spice powder screening has low efficiency and frequent screen blinding, it leads to increased rework rates and a higher risk of cross‑contamination. If the sealing structure is inadequate, spice dust escapes, causing material loss, and the overall efficiency of the entire production line is compromised.
The Gaofu SZF series linear vibrating screen is driven by two synchronously counter‑rotating vibration motors. When the two motors operate, their horizontal excitation forces cancel each other out, while the vertical excitation forces add together, driving the screen deck in a high‑frequency linear vibration. The material moves forward on the screen surface in a parabolic jumping trajectory, quickly becoming loose, stratified and passing through the screen.
This motion pattern determines the core advantages of the linear vibrating screen in large‑scale spice production. The material travels a long forward path in a jumping motion, ensuring thorough screening and high production efficiency. The equipment can be configured with 1 to 5 screen decks, so one machine with a single feed can simultaneously classify materials into 2 to 6 different particle size fractions.
For spice processing, multi‑layer classification means that the production line does not need multiple screens in series. A single linear vibrating screen can collect different mesh sizes of spice powder separately – from coarse chilli powder to ultra‑fine chilli powder, one batch of raw material in, multiple grades of finished product out.
The following five dimensions explain why the Gaofu multi‑layer linear vibrating screen for spices meets the high demands of large‑scale production lines.
Advantage 1: One‑step multi‑layer classification – simplifies line layout. The SZF series linear vibrating screen can be designed with 1 to 5 screen decks as required. A single feed can separate the material into 2 to 6 different size fractions. For spices that need to be classified by particle size (e.g., chilli powder divided into coarse, medium and fine grades), this design greatly reduces the number of equipment units and floor space.
Advantage 2: High capacity – no bottleneck on the line. The Gaofu SZF series linear vibrating screen covers models from SZF‑520 to SZF‑1540, with capacities from 15 to 500 tonnes per hour, accommodating both small‑batch fine production and large‑scale continuous line operation. For a large‑scale seasoning plant with a daily output of about 20 tonnes, a single linear vibrating screen has enough capacity to meet the line rhythm without needing multiple units in parallel.
Advantage 3: Food‑grade stainless steel – hygiene guaranteed. The Gaofu SZF series linear vibrating screen is widely used in the food industry for screening starch, salt, icing sugar, soybeans, peanuts, spices and other raw materials, ensuring food purity. Material‑contact parts can be made of SUS304 or 316 stainless steel, complying with food GMP hygiene standards. The whole machine surface is mirror‑polished, with no dead corners, preventing material residue and cross‑contamination.
Advantage 4: Fully enclosed structure – no dust escape. During seasoning screening, if spice powder accumulates for a long time in gaps and corners, it not only wastes material but also breeds bacteria. If spice powder is not sealed during screening, dust dispersion will greatly increase material loss. The Gaofu linear vibrating screen has a fully enclosed frame design, with optional negative pressure dust extraction ports, effectively suppressing dust escape, improving the workshop environment, and meeting environmental and clean production requirements.
Advantage 5: Stable and reliable – operates 24/7. The vibration motors are optimised for low noise, low energy consumption and long service life, ensuring stable continuous operation 24 hours a day. The screen mesh is tension‑mounted and can be changed quickly without special tools, greatly reducing downtime and lowering maintenance costs.
The Gaofu multi‑layer linear vibrating screen is suitable for large‑scale screening of the following spices and seasonings:
Chilli powder classification screening. After grinding, chilli powder is separated into coarse, medium and fine grades to meet different food processing needs. In chilli powder production, the linear vibrating screen removes oversized particles and off‑spec fines to ensure uniform finished particle size.
Fine screening of ginger powder, garlic powder and other seasoning powders. The particle size distribution of dried ginger powder, garlic powder and other seasoning powders directly affects solubility and user experience. Through precise mesh configuration, the linear vibrating screen ensures batch‑to‑batch consistency of seasoning powder particle size.
Impurity removal from star anise powder, Sichuan pepper powder and other spices. Removes fibre fragments, hard shell particles and other impurities mixed into the raw material, improving product purity and mouthfeel.
Raw material pre‑treatment for compound seasonings. Before multiple spice powders enter the mixing equipment, they are uniformly screened to remove impurities, ensuring raw material purity and flowability, creating good conditions for accurate batching and mixing.
Particle size control for savoury flavours and seasoning bases. Classifies fine powders such as savoury flavours and seasoning bases by particle size, ensuring the solubility and taste consistency of the final product.
To meet different spice screening needs, the Gaofu SZF series linear vibrating screen offers flexible configuration options. The following are common configurations for reference:
Basic impurity removal type (single deck). Suitable for initial pre‑treatment of incoming raw materials, removing foreign matter and coarse particles. A single coarse mesh deck is sufficient. The equipment has a simple structure and is suitable for high‑throughput applications where classification requirements are not strict.
Coarse powder and fine powder separation type (double deck). The top deck retains coarse particles and large impurities, the bottom deck separates fines and ultra‑fines, and the acceptable finished product is discharged from the middle deck. For chilli powder, for example, the top deck uses 8‑10 mesh to remove coarse fibres and debris, the bottom deck uses 60‑80 mesh to separate ultra‑fine powder, and the medium‑size chilli powder is discharged from the middle deck.
Multi‑grade finished product classification type (three or more decks). Suitable for producing 2‑3 particle size grades of spice products simultaneously. One machine with a single feed produces multiple specifications, greatly improving line flexibility. For seasoning plants that need to switch product specifications frequently, this configuration has obvious efficiency advantages.
For material selection, 304 stainless steel for material‑contact parts is recommended for spice screening. For applications requiring frequent cleaning or contact with highly acidic spices (e.g., tomato powder, citric acid‑based seasonings), 316L stainless steel, which has better corrosion resistance, can be chosen. For 24‑hour continuous production lines, a dual‑vibration‑motor drive configuration is recommended to ensure long‑term stable operation, and a negative pressure dust extraction port should be reserved to further control workshop dust concentration.
Gaofu provides one‑stop, full‑process services from selection, design, manufacturing, installation and commissioning to after‑sales maintenance. We have provided reliable screening equipment and technical support to more than 3,000 enterprises worldwide.
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was originally founded in the 1980s. After more than 40 years of development, the company has become a "National Specialized and Sophisticated 'Little Giant' Enterprise", a "National Green Factory", a "National High-tech Enterprise", a "National Intellectual Property Advantage Enterprise", and the "President Unit of the Vibration Association". It also hosts the "Henan Provincial Industrial Design Center", the "Henan Provincial Engineering Technology Research Center for Intelligent Online Screening Systems", and the "Xinxiang Municipal Engineering Technology Research Center for Fine Screening". The company has been granted more than 500 invention, utility model and design patents, has received the "Science and Technology Achievement Award" issued by the Ministry of Industry and Information Technology, and has participated in drafting four "National Standards".
Gaofu's product portfolio covers several series and hundreds of varieties, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment, and automated material handling systems. Its main products include vibrating screens, screening machines, vibrating sifters, rotary vibrating screens, ultrasonic vibrating screens, linear screens, air flow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeders, dust-free feeding stations, ton bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag discharge filters, leaf filters, clay filters, toothed roll crushers, coal crushers, and other equipment. These are widely used in many industries such as food, pharmaceuticals, chemicals, metallurgy, building materials, mining, thermal power, and environmental protection, earning the trust and praise of over 10,000 customers worldwide.
Gaofu products are not only popular in Greater China but are also exported to more than 100 countries and regions, including Russia, Canada, the United States, New Zealand, Japan, Brazil, South Africa, etc. The company adheres to its mission: "Enhance material quality and efficiency, meet customer needs", walking side by side with customers for harmonious and win-win cooperation. Today, Gaofu has become an approved supplier to many Fortune 500 companies, including CNPC, Sinopec, Sinochem Group, China Resources Group, Sinopharm Group, COFCO Group, China National Building Material Group, China Aerospace, and Jinchuan Group.
Gaofu Machinery – Global No.1 in Vibrating Screen Sales. In May 2024, Frost & Sullivan, an international authoritative advisory firm, based on its research on the global vibrating screen market and calculated according to global vibrating screen sales volume in 2023, issued a market position confirmation certificate to Gaofu Machinery.
