Roaster For Multi Grain
A Multi-Grain
Roaster is a specialized machine designed to handle grains of different sizes,
densities, and moisture levels—such as wheat, maize, ragi, pulses, and seeds—in
a single unit. Because different grains have different "burning
points," these machines prioritize uniform heat distribution and precise
temperature control.
1. Types of
Multi-Grain Roasters
|
Type |
Best For |
Mechanism |
|
Rotary Drum
Roaster |
Pulses, Chana,
Peanuts, Wheat |
A rotating
horizontal drum with internal spirals that toss the grains over a heat
source. |
|
Sand/Salt Roaster |
Muri (Puffed
Rice), Poha, Corn |
Uses hot sand or
salt as a heat transfer medium to achieve a "puffed" or traditional
roasted texture. |
|
Fluidized Bed
Roaster |
Fine grains,
Sesame, Amaranth |
Suspends grains
in a stream of hot air. Very fast and prevents scorching of delicate outer
skins. |
|
Batch Tray
Roaster |
Spices, Medicinal
grains |
Grains are spread
on trays. Best for small-scale, high-value specialty grains. |
2. Technical
Specifications (100–500 kg/hr Range)
|
Feature |
Standard
Specifications |
|
Capacity |
50 kg/batch up to
1,000 kg/hr (Continuous) |
|
Heating Source |
Electric
(Induction/Heaters), LPG, Natural Gas, or Wood/Pellets |
|
Material |
SS 304 (Inner
Drum) / MS or SS (Outer Body) |
|
Temperature Range |
50°C to 300°C
(Adjustable) |
|
Motor Power |
1 HP to 5 HP
(depending on drum size) |
|
Automation |
Digital Temp
Controller, VFD (Variable Speed), Auto-Discharge |
3. Key Features for
"Multi-Grain" Flexibility
- Variable Speed Drive (VFD): Crucial
because heavy grains (Maize) need slower rotation, while light grains
(Millet) need faster movement to prevent burning.
- Internal Agitators/Baffles: These are
specially designed fins inside the drum that ensure the grains don't just
"slide" but actually "flip" for 360-degree roasting.
- Multi-Fuel Compatibility: Many modern
roasters in Ahmedabad are built to switch between Gas and Electricity
depending on fuel prices.
- Inbuilt Cooling Tray: Roasted grains carry
residual heat; a cooling tray with a suction fan is essential to
"lock in" the flavor and prevent over-roasting after discharge.
