Destoner Machine for Rice Mills: Complete Guide 2026
A destoner machine is one of the most important machines in any rice mill. It removes stones, mud balls, glass pieces, metal bits and heavy impurities from paddy or rice. When rice comes from farms, it always has some amount of stones and soil mixed with it. If we directly send this rice to milling without destoning, it damages the machinery and reduces the quality of final rice.
This complete guide explains everything: what a rice destoner is, how it works, types, uses, price range, benefits, and why every rice mill must install one.
Rice & Paddy Destoner Machine
| Category | Details |
|---|---|
| Main Purpose | Removes stones and heavy impurities from rice or paddy |
| Other Names | Rice stone remover, Paddy destoner, Rice stone separator |
| Working Principle | Difference in weight and density (stones are heavier, rice is lighter) |
| Common Types | Gravity Destoner, Vibratory Destoner, Suction-type Destoner |
| Capacity Range | 1 TPH – 12 TPH (depends on mill size) |
| Price Range (India) | ₹60,000 – ₹4,50,000 (approx) |
| Benefits | Better rice quality, protects machinery, and smooth production |
| Used In | All small, medium & large rice mills |
What is a Rice Destoner Machine?
A rice destoner machine removes stones and heavy impurities from rice or paddy.
It works on a simple logic:
- Stones are heavier
- Rice is lighter
Using air pressure, vibration, and density difference, the machine separates stones from clean rice.
Destoner is a must-have in rice mills because:
- It improves purity of rice
- It protects rubber rollers, polishers, whitener, and grader
- It increases the life of costly machines
- It boosts overall efficiency of the rice mill
Without destoning, small stones go into the final rice bag, which reduces quality and creates customer complaints.
How a Rice Destoner Machine Works
A standard destoner uses three combined actions:
1. Vibration
The machine vibrates continuously, spreading rice grains evenly on the table.
2. Airflow
Air blows from the bottom, lifting lighter rice slightly upward.
3. Density Separation
Heavier stones move downward against the airflow, while rice flows toward the outlet.
The stones slowly move to a separate section and are discharged from a different outlet.
Some advanced destoners also include:
- Automatic feeding
- Multi-stage suction
- Adjustable airflow
- Low-dust operation
Types of Rice Destoner Machines and Their Uses
There are mainly 3 types of rice destoners used in India.
1. Gravity Destoner Machine
This machine uses density difference + vibration to separate stones.
Uses:
- Ideal for raw paddy
- Suitable for medium & large rice mills
- Best for farm-fresh grains with more dust or stones
Advantages:
- Very accurate
- Low maintenance
- Good for heavy impurities
2. Vibratory Destoner Machine
This is similar to gravity type but allows more adjustable settings for finer separation.
Uses:
- Small and medium rice mills
- Basmati rice processing units
- Places where stone size varies
Advantages:
- Precise stone removal
- Adjustable airflow
- High output with less noise
3. Suction-Type Destoner Machine
This machine uses strong suction fans to remove stones.
Uses:
- Clean rice polishing units
- Modern automatic rice mills
- Export-quality processing
Advantages:
- Dust-free operation
- Smooth and high-speed separation
- Best for commercial mills requiring high hygiene
Comparison of Types of Destoner Machines
| Type | Best For | Accuracy | Maintenance | Cost |
|---|---|---|---|---|
| Gravity Destoner | Heavy impurities | Very High | Low | Medium |
| Vibratory Destoner | Basmati & fine separation | High | Medium | Medium |
| Suction-Type Destoner | Modern automatic mills | Very High | Medium | High |
Benefits of Installing a Destoner Machine in a Rice Mill
✔️ 1. Produces stone-free, clean rice
Customers prefer pure rice without stones or mud balls.
✔️ 2. Protects expensive milling machinery
If stones go inside rice polishers, whiteners or rollers, they get damaged quickly.
✔️ 3. Increases life of plant & equipment
Less wear and tear means longer life and lower maintenance cost.
✔️ 4. Improves overall efficiency
Clean grain flows smoothly in the entire milling line.
✔️ 5. Gives higher profit
Stone-free rice sells at better price in market.
Destoner Machine Price in India
Price depends on:
- Capacity (1 TPH – 12 TPH)
- Type of destoner
- Brand quality
- Features and automation
- After-sales support
| Capacity | Approx Price |
|---|---|
| 1–2 TPH | ₹60,000 – ₹1,20,000 |
| 3–4 TPH | ₹1,50,000 – ₹2,40,000 |
| 5–8 TPH | ₹2,50,000 – ₹3,80,000 |
| 10+ TPH | ₹3,50,000 – ₹4,50,000 |
Note:- Prices mentioned above are approximate and may change.
Actual cost depends on the capacity, machine type, brand, and custom features of the destoner machine.
Important Points to Consider Before Buying a Destoner
When choosing a destoner for your rice mill, check:
- Capacity (TPH)
- Accuracy level
- Motor quality
- Air blower strength
- Table vibration quality
- Easy cleaning & maintenance
- Power consumption
- After-sales service
- Availability of spare parts
A good machine gives stable output for many years.
How Destoner Machines Improve Rice Quality
A destoner directly improves the quality of rice because:
- It removes stones and heavy impurities
- Final rice becomes smoother and cleaner
- No damage happens in polishing
- Rice color becomes better
- Less broken rice is produced
So appearance, taste and purity — all improve.
Factors Affecting Destoner Machine Price
Price of a rice destoner depends on:
- Machine capacity
- Build quality
- Technology used
- Brand reputation
- Custom features
- Power requirement
- Size and material of table
- Additional suction/dust control system
Bigger capacity + advanced features = higher price.
Why Rice Milling Experts Recommended Destoner Machines
Rice Milling Experts provides:
- Proper machine selection
- Layout planning
- Installation support
- After-sales service
- AMC and spare parts supply
- Consultancy for full plant setup
We help you choose the right destoner based on your rice type, line size and budget.
Conclusion
A destoner machine is a basic but very important machine for all rice mills.
It ensures stone-free, clean, and premium quality rice.
It protects expensive machinery, improves output, and increases profit.
Whether you have a small mill or a large automatic plant, installing a good quality destoner is always a smart investment.
Q1. What does a rice destoner machine do?
It removes stones, mud balls, and heavy impurities from paddy or rice to improve quality and protect milling machines.
Q2. Which type of destoner is best for rice mills?
For most mills, gravity destoners are best.
For high-precision cleaning, vibratory or suction-type destoners work better.
Q3. What is the price of a rice destoner machine in India?
Basic models start from ₹80,000–₹1.5 lakh, while advanced models range from ₹2–₹4 lakh+ depending on capacity and features.
Q4. Does a destoner machine need regular maintenance?
Yes, simple cleaning, checking air settings, and timely servicing keeps the destoner running smoothly.
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