Synergistic Application of Spice Grinder with Conveyor and Sifter Machine in Spice Grinding Line
By:Salinovate Team Apr 01,2026
This article provides a systematic analysis of the combined design scheme of grinder machine, conveyor machine, and powder sifter in a dry spice grinding line. The aim is to help you create an efficient, stable, and precise spice processing system.
I. Introduction: From Standalone Machine to System–The Value of Equipment Integration
In dry spice pulverization, a single grinder often struggles to achieve efficient and stable continuous production independently. Problems such as low material conveying efficiency, uneven manual feeding, and uncontrollable finished product fineness frequently become bottlenecks restricting production capacity and quality.
The core value of equipment integration: By organically integrating the grinder with automatic feeding equipment and a sieving machine, a complete production line is formed from raw material conveying to finished product sieving, achieving:
● Continuous production, increasing capacity
● Automated operation, reducing labor costs
● Precise fineness control, ensuring product consistency
● Reduced dust pollution, improving the working environment
This article will start with the spice characteristics to analyze the selection of different spice conveying methods, and the key role of the powder sifter in fineness control of the spice grinding line.
II. Automatic Feeding Equipment: Selecting a Conveying Solution Based on Material Characteristics
The raw materials used in spice grinding lines are diverse, ranging from granular spices to flakes and blocks, requiring different automatic conveying equipment. In most cases, screw conveyor and belt conveyor are the two major choices for automatic conveying usage.
2.1 Screw Feeder – The Ideal Choice for Granular Materials
1)Working Principle: The screw feeder pushes materials through a closed feed tube using rotating screw blades, achieving continuous and stable quantitative conveying. You can see in the following video the integration of the screw feeder with the grinder machine.
2)Applicable Materials:
Material Type | Specific Example | Morphological Characteristics |
Granular spices | Black pepper, white pepper, fennel seeds, etc | Uniform particle size, good flowability |
Pre-crushed materials | Crushed ginger, turmeric, chili flakes, etc | Lumpy, irregular shape |
3)Technical Advantages:
Advantages | Explanation |
Closed conveying system | Reduce dust emissions and improves the working environment. |
Precise feeding | Variable frequency speed control allows for precise control of feed volume. |
High adaptability | Customized based on the conveying height and distance. |
4)Technical Parameters:
● Conveying Capacity: 100-1000kg/h
● Conveying Distance: 2-8m
● Pipe Diameter: Φ76-159mm
● Material: 304 Stainless Steel, Food Grade
5)Application Recommendations:
● Preferred for spices with uniform particle size
● Automatic feeding is recommended when the capacity reaches 400-500kg/h; Certainly, it is also optional for lower capacity to enhance working efficiency.
● It can be linked with a grinder to automatically adjust the feeding speed according to the grinding speed.
2.2 Belt Conveyor – A General Solution for Flake and Lump Materials
1)Working Principle: The conveyor belt, driven by a motor, smoothly transports the material to the feed inlet of the crusher. By watching the video below, you can see the conveying process of the belt conveyor:
2)Applicable Materials:
Material Type | Specific Examples | Morphological Characteristics |
Flake dried spices | Dried chili peppers, dried ginger slices, dried turmeric slices | Flakes, irregular shape |
Lump dried spices | Dried cinnamon, dried tangerine peel | Lump shape, hard texture |
3)Technical Advantages:
Advantages | Explanation |
High adaptability | Convey sheet-like, block-like, and irregular materials. |
Smooth conveying | No damage to materials, maintaining raw material integrity. |
Easy to clean | Smooth belt surface, easy to clean. |
Equipped with an Iron Remover(optional) | Be equipped with a magnetic separator to remove metal impurities. |
4)Technical Parameters:
● Conveying Capacity: 200-1000kg/h
● Belt Width: 300-600mm
● Belt Speed: 0.1-1.0m/s (Variable Frequency Adjustable)
● Material: Food-grade PU or PVC conveyor belt
5)Application Recommendations:
● Preferred for flake and block-shaped dry spices.
● Be equipped with a hopper for easy manual feeding or use with an elevator
● Recommended to equip with a metal detector or iron removal device to protect the grinder blades.
2.3 Automatic Feeding Equipment Selection Comparison Table
Material Form | Recommended Feeding Equipment | Capacity Range | Applicable Scenarios |
Granular (black pepper, white pepper) | Screw feeder | 200-1000kg/h | Closed conveying, reduced dust |
Pre-crushed materials(ginger crumble, chili crumble) | Screw feeder | 200-1000kg/h | Continuous conveying of lump materials |
Flakes (dried chili, dried ginger slices) | Belt conveyor | 300-1000kg/h | Stable conveying of flake materials |
Lumps (dried cinnamon, dried tangerine peel) | Belt conveyor | 300-1000kg/h | Good adaptability to irregular materials |
Mixed form | Belt conveyor + manual assistance | 200-1000kg/h | Multiple variety switching |
2.4 Production Capacity 400-500 kg/h: The Necessity of Automatic Feeding
When the production line capacity reaches 400-500 kg/h, manual feeding will face the following problems:
● High feeding frequency, resulting in high labor intensity for workers
● Uneven feeding, affecting the stability of the crusher's load
● Dust pollution, resulting in a poor working environment
● Increased safety hazards
At this point, it is highly recommended to install automatic feeding equipment to achieve:
● Continuous and stable feeding, ensuring a stable crusher load
● Reduced manual intervention, allowing one person to monitor the entire line
● Improved working environment, meeting environmental protection requirements
● Increased capacity utilization, improving equipment efficiency by 15-20%
III. Sifting Machine: A Key Link in Precisely Controlling Finished Product Fineness
What role does a sifting machine play in the production line? See the following detailed explanation.
3.1 Why is a Sifting Machine Necessary?
While a grinder can pulverize dry spices, the pulverized powder often suffers from the following problems due to material characteristics and equipment condition:
● Uneven particle size distribution, a mixture of coarse and fine particles
● Some insufficiently pulverized particles are mixed into the finished product
● Affect the product's taste and performance
The function of a sieving machine:
● Separate coarse powder that does not meet fineness requirements
● Ensure uniform particle size in the finished product
● Return coarse powder to the grinder for further pulverization
● Meet customers' precise fineness requirements
3.2 Types and Selection of Sifting Machines
In dry spice grinding lines, vibrating powder sifters are generally used to screen and separate spice powders of different particle sizes. Vibration methods include bouncing ball vibration and ultrasonic vibration. Both vibration methods are suitable for screening spice powders of varying coarseness.
3.3 Layout of Sieving Machines in Production Lines
There are basically two layouts for sieving machines in dry spice grinding lines, which are described below.
Solution | Layout | Advantages | Applicable Scenarios |
Online screening | Crusher → sifting machine → finished product | Continuous production, high efficiency | Large batch single variety |
Offline screening | Crusher → collection → screening → finished product | High flexibility | Multiple varieties, small batch |
3.4 Sifting Machine Selection Recommendations
Product Fineness Requirements | Recommended Sieving Machine Type | Screen Specifications | Description |
20-60 mesh | Bouncing ball vibration type | 20-60mesh | Common spice powder |
60-120 mesh | Ultrasonic vibration type | 60-120mesh | Fine spice powder |
IV. Integrated Spice Grinding Line Solution and Equipment Parameters
So, how to integrate the conveyor, spice grinder, and powder sifter in one grinding line? You can see the following solution design.
4.1 Standard Configuration Solution
Section | Equipment | Selection Considerations | Applicable Materials |
Feeding | Screw feeder or belt conveyor | Select according to material form | Granular/Flake/Block |
Crushing | Spice grinder | Oil content, fineness requirement, cooling system, etc | Various dry spices |
Sifting | Vibrating sifter | Powder fineness, oil content, etc | Spice powder |
Dust removal | Dust collector | Collect dust, environmentally friendly emissions | Entire Line |
4.2 Production Line Configuration Recommendations for Different Spices
Spices Type | Feeding Equipment | Crushing Equipment | Sifting Equipment | Remark |
Black pepper (granular) | Screw feeder | SLU, SL, etc series | Vibrating sifter(bouncing ball) | Match production capacity with required fineness. |
Dried chili pepper | Belt conveyor | SLU, SL, etc series | Vibrating sifter(bouncing ball) | Match production capacity with required fineness. |
Dried ginger slices | Belt conveyor | SLU, SL, SLA series | Vibrating sifter(bouncing ball, ultrasonic vibration) | Whether or not coarse crushing is needed depends on the situation. |
Cinnamon | Belt conveyor | SLC + SLA/SLU/SL series | Vibrating sifter(bouncing ball, ultrasonic vibration) | The design of the pulverizing line depends on the required fineness and production capacity. |
V. Conclusions and Recommendations
The integration of equipment in a spice grinding line is the key to achieving efficient, stable, and precise spice powder production. Based on your material characteristics and capacity requirements, Salinovate team can rationally select conveyor machine, and powder sifter machine for you to form a collaborative system with the spice grinder for your spice factory. Such integration design can bring significant benefits in spice powder production efficiency and final spice powder quality control.
If there is any need to design the dry spice grinding line, welcome to contact us.
