Drum Roaster Machine

Drum Roaster 50 Litre LPG - Packing Machine ManufacturesA drum roaster machine uses a rotating, horizontal metal drum heated from below (usually by gas burners) to roast items like coffee beans, nuts, and spices, mixing them with internal paddles for even heat transfer via conduction (drum contact) and convection (hot air). Key components include the drum, motor, heat source, exhaust fan for smoke/chaff, and a cooling tray. It offers slow, controllable roasting, developing rich flavors but requiring careful management to prevent scorching.

Core Components & Function

Roasting Drum: A large, cylindrical metal vessel that rotates horizontally.

Heat Source: Typically gas burners located beneath the drum, heating the metal and the air inside.

Paddles/Flights: Spiral fins inside the drum that tumble and mix the product for uniform roasting.

Motor: Drives the drum's rotation and sometimes the cooling tray agitator.

Exhaust System: Removes smoke, chaff (skins), and dust from the drum and cooling tray.

Cooling Tray: A separate tray with a fan and agitator to rapidly cool the roasted product after it drops from the drum.

Roasting Process

Loading & Heating: Unroasted product (coffee, nuts, etc.) is loaded into the preheated drum.

Drying Phase: Moisture is removed as the drum rotates, with heat transferred by conduction (from the hot drum) and convection (hot air).

Browning/Development: The product browns (Maillard reaction), and sugars caramelize, developing aroma and flavor.

Cooling: After reaching the desired roast level (e.g., “first crack” for coffee), the product is discharged into the cooling tray, where air rapidly cools it.

Key Characteristics

Heat Transfer: Uses both direct contact (conduction) and hot air (convection) for a rich flavor profile.

Control: Offers high control for developing body and nuanced flavors, often used by artisans.

Speed: Generally slower than air roasters, with roast times of 14-20 minutes common.

Applications: Popular for coffee, but also great for nuts, seeds, and even some vegetables.

Drum vs. Air Roasters

Drum Roasters: Slower, richer flavor, uses conduction/convection, better for body.

Air Roasters: Faster, cleaner/brighter flavor, uses 100% convection (hot air only).

MODEL MOTOR CAPACITY

10KG DRUM 0.25HP 10KG/ BATCH

25KG DRUM 0.5HP 25KG/ BATCH

50KG DRUM 1HP 50KG/ BATCH