1. General Description
The JKL DRL-5 is a laboratory rotary sample divider designed for the representative reduction and homogenization of bulk solid samples, particularly minerals, concentrates, tailings, coal, and other granular materials. Its rotary distribution system ensures uniform subdivision of the sample stream, minimizing bias and ensuring high statistical precision for chemical and metallurgical testing.
With a nominal feed capacity of up to 5 liters per cycle, the DRL-5 is ideally suited for quality control laboratories, sample preparation facilities, and pilot plant operations.
2. Operating Principle
The unit operates under the principle of continuous rotary division:
- The sample is fed through a top-mounted feed hopper.
- The material flows by gravity into a central distribution cone.
- A rotating plate or rotary distribution assembly uniformly distributes the material into multiple radially arranged collection containers.
- Constant rotational speed ensures each fraction receives a proportional portion of the total sample, in accordance with representative sampling criteria.
This system significantly reduces errors commonly associated with manual methods or static riffle splitters.
3. Technical Specifications (Reference Values)
- Model: JKL DRL-5
- Feed Capacity: Up to 5 liters per cycle
- Division Type: Continuous rotary
- Number of Outlets: Configurable (typically 8 to 16 fractions)
- Recommended Particle Size Range: Up to 10–15 mm (depending on configuration)
- Materials of Construction:
- Sample Contact Parts: AISI 304 / AISI 316 stainless steel
- Structural Frame: Carbon structural steel with epoxy coating
- Rotational Speed: Controlled via precision gearmotor
- Drive System: Electric motor with direct coupling or flexible coupling transmission
- Control System: Local control panel with main power switch and start/stop controls
- Power Supply: 220 V / 50–60 Hz (configurable upon request)
4. Mechanical Design Features
- Fully enclosed splitting chamber to prevent cross-contamination and dust dispersion.
- Compact benchtop design with rigid structural frame and stable base.
- Removable collection containers for easy handling and cleaning.
- Safety guarding with fixed or hinged front protective cover.
- Bottom discharge system for cleaning and maintenance access.
5. Operational Advantages
- High precision and repeatability in sample division.
- Reduction of Fundamental Sampling Error (FSE) and segregation error.
- Improved laboratory safety and cleanliness.
- Reduced sample preparation time.
- Easy maintenance and rapid disassembly of critical components.
6. Applications
- Metallic and non-metallic mining laboratories.
- Mineral processing plants (process control sampling).
- Cement plants and aggregate processing facilities.
- Coal industry laboratories.
- Research laboratories and universities.
- Quality control of concentrates and tailings.
7. Standards and Compliance
The DRL-5 rotary sample divider aligns with international best practices for sample preparation under the framework of recognized sampling standards, including:
- ISO 13909 – Hard coal and coke mechanical sampling
- ISO 3082 – Iron ores sampling and sample preparation
- ISO 12743 – Copper, lead, zinc and nickel concentrates sampling
- Representative sampling statistical principles according to Gy’s Sampling Theory
