Introduction of Rice Flour Production Line

Rice flour is produced from polished rice via crushing, grinding, sieving, drying, and classification processes. It is widely used in food processing, baking, frozen foods, baby food, and various gluten-free products.

A Rice Flour Production Line is an industrial processing line designed to clean, grind, dry, classify, and package rice flour. It includes all steps needed to transform finished rice grains into uniform, safe, high-quality rice powder.

Rice Flour is Mainly Classified into Three Processing Methods:

1. Dry-milled Rice Flour

2. Wet-milled Rice Flour

3. Semi-wet Rice Flour

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Dry Milling Process

Dry milling is the most popular, efficient, and cost-effective method suitable for most food applications.

1. Dry Milling Process Flow

Rice → Cleaning → Destoning → Magnetic Separation → Crushing → Fine Grinding → Sieving → Ultrafine Milling (optional) → Packaging

2. Key Equipment and Functions

(1) Cleaning & Pre-treatment

Rice cleaner: removes impurities

Destoner: removes stones

Magnetic separator: removes metal particles

(2) Rice Crusher

Breaks rice into small granules to reduce grinding load

(3) Fine Grinding Machines

Equipment	Fineness	Application
Hammer Mill	40–80 mesh	regular rice flour
Turbo Mill	80–200 mesh	Glutinous rice flour, baking rice flour
Cryogenic Mill	120–300 mesh	Infant rice cereal, high-end food
Jet Mill	200–600 mesh	Superfine rice flour, functional rice flour

(4) Sieving System

Vibrating sieve/airflow sieve / ultrasonic sieve: Used for precise classification

(5) Automatic Packaging

10–50 kg packing machine: Small pouch packing machine

3. Features of Dry-milled Rice Flour

Short process, low investment

High capacity, low energy consumption

Consistent particle size

Produces 40–600 mesh flour

4. Applications

Rice flour for baking

Infant rice cereal

Seasoning and compound powder

Crackers, snacks

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Wet Milling Process

Wet milling produces whiter, finer, more elastic flour, suitable for premium food-grade products.

1. Wet Milling Process Flow

Rice → Washing → Soaking → Softening → Wet Grinding → Slurry Separation → Dewatering (Filter press/Centrifuge) → Drying → Milling → Sieving → Packaging

2. Key Equipment and Functions

(1) Soaking System

Equipment: rice washer, soaking tanks

Function: softens rice and improves grindability

(2) Wet Grinding System

Equipment: stone mill / colloid mill / wet grinder

Advantage: produces fine and smooth slurry

(3) Slurry Separation

Hydrocyclone, filter cloth

Removes coarse residues for a uniform slurry

(4) Dewatering Equipment

Equipment	Features
Filter Press	High dehydration rate
Centrifuge	Continuous dehydration, high yield

(5) Drying Equipment

Hot air dryer

Flash dryer

Vibrating fluidized bed dryer

Moisture after drying: 10–14%

(6) Milling After Drying

Turbo mill / low temperature grinder

Features of Wet-milled Rice Flour

High whiteness and fineness

Strong viscosity and good gelatinization

Excellent for glutinous rice applications

4. Applications

Glutinous rice ball flour

Cheung fun flour/rice sheet flour

Mochi and rice cake flour

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Semi-wet Milling Process

Semi-wet milling offers moderate gelatinization and elasticity, ideal for steamed and cooked rice-based products.

1. Semi-wet Milling Process Flow

Rice → Washing → Moisture Spraying → Conditioning → Low-temperature Grinding → Sieving → Packaging

2. Key Equipment Used

Automatic moisture sprayer

Conditioning mixer

Moisture stabilization bin

Low-temperature mill

Vibrating sieve

3. Features of Semi-wet Milled Flour

Wet-milled quality with lower cost

Moderate gelatinization, non-sticky

Good for film-forming and stretching foods

4. Applications

Cheung fun

Rice noodles

Rice sheets and rice rolls

Frozen rice-based products