OTF-1200X-R5-BM Rotary Ball Milling Furnace with Controlled Atmosphere and Up to 1100°C Operating Temperature
The OTF-1200X-R5-BM is engineered for advanced powder processing tasks requiring simultaneous milling and nitriding under a controlled atmosphere. It is particularly suited for preparing rare-earth-free magnetic materials and catalyst activation through mechanochemical methods. The system integrates a rotary quartz processing tube with internal YSZ milling balls that reduce powder particle size while exposing the material to ammonia gas for nitriding at elevated temperatures.
This compact rotary furnace features a two-zone heating system that maintains a stable temperature zone of 100 mm within ±2°C, reaching up to 1100°C continuously when using the quartz tube. The tube rotates at variable speeds up to 10 RPM, driven by a gear DC motor, enabling effective mechanochemical activation. The design includes a double-shell casing with alumina fibrous insulation for energy efficiency and a split cover for rapid cooling and ease of operation.
Key Features
- Two-zone independent PID temperature control with 30-segment programmability and ±1°C accuracy.
- Rotatable 5-inch quartz processing tube (1100 mm length) with four internal mixing blades for enhanced milling.
- Variable tube rotation speed from 0 to 10 RPM with digital control and display.
- Supports ammonia (NH3) gas flow for powder nitriding within the rotating tube.
- Double shell casing with alumina fibrous insulation and cooling fans for thermal management.
- Optional SS310 alloy tube available for applications up to 900°C.
Technical Specifications
| Parameter | Specification |
|---|---|
| Maximum Operating Temperature (Quartz Tube) | 1100°C continuous |
| Maximum Operating Temperature (SS310 Tube) | 900°C continuous |
| Heating Zones | Two zones, each 140 mm; total 280 mm heating length |
| Constant Temperature Zone Length | 100 mm within ±2°C |
| Processing Tube Diameter | 5 inches (quartz) |
| Processing Tube Length | 1100 mm |
| Tube Rotation Speed | 0–10 RPM variable, digital control |
| Temperature Control | Two PID digital controllers, 30 segment programmable, ±1°C accuracy |
| Power Supply | 208–240 V, single-phase, max 3 kW (2500 W transformer) |
| Gas Atmosphere | Ammonia (NH3) gas flow supported via rotary gas fittings |
| Rotary Gas Fittings | Magnetic fluid seal with flange, 1/4″ tube connection |
Typical Applications
Ideal for mechanochemical activation of catalysts such as those used in CO2 methanation, powder nitriding processes, and preparation of rare-earth-free magnetic materials. The controlled atmosphere and milling capability enable advanced material synthesis and modification at high temperatures.
Configuration & Operating Notes
The furnace includes a split cover for rapid cooling and ease of access. Optional accessories include a multi-channel mass flow controller (MFC) gas delivery system for precise gas atmosphere control. The SS310 alloy tube is available as an upgrade for applications requiring operation up to 900°C with enhanced tube durability. Proper connection of rotary gas fittings and adherence to safety protocols for handling ammonia gas are essential for safe operation.
