70 liter closed-circuit ball mill with spiral classifier, open lid and control panel

Continuous Ball Mill with Spiral Classifier (70 Liter Closed-Circuit )

Spiral classifier discharge unit on continuous ball mill system

Continuous ball mill with spiral classifier product discharge outlet (rear-side view)

70l-continuous-ball-mill-spiral-classifier-discharge-connection

Grinding media balls inside the drum of 70 L continuous ball mill

Discharge port with splash guard on 70 L continuous ball mill

Water supply lines and safety controls under the spiral classifier section of continuous ball mill system

DESCRIPTION

The ÜNAL 70-liter closed-circuit ball mill with spiral classifier is designed for laboratory and pilot-scale wet grinding and mineral beneficiation tests, combining grinding and classification within a single continuous loop. The system operates with a Ø350 × 700 mm AISI 304 stainless steel mill drum, where the material is ground together with water. The discharge slurry flows directly to the spiral classifier, where particles are separated based on their settling behavior: the fine fraction is recovered as product via the overflow, while the coarse fraction is returned to the mill by the spiral, ensuring true closed-circuit operation. This configuration provides stable product particle size distribution and repeatable grinding performance during continuous operation.

For operator safety and working comfort, the mill is equipped with a fully enclosed cabinet. All rotating components are contained within the enclosure, and acoustic insulation integrated into the cabin panels helps reduce operating noise. Emergency stop buttons, positioned for easy access, further enhance safe operation.

The machine is supplied together with a spiral classifier, allowing grinding and classification to be carried out in the same process loop. A mobile feeder can also be provided to support controlled and consistent material feeding, offering flexibility in layout and ease of use during different test campaigns.

The typical feed size is < 6.35 mm, with a wet grinding capacity of 37–74 kg/h for medium-hard ores, depending on material characteristics and target particle size. Hardened steel grinding balls are used as the grinding media. As the manufacturer, ÜNAL delivers this machine based on its own in-house design and manufacturing infrastructure.

TECHNICAL DATA

Feeding Size < 6.35 mm

Final Fineness < 38 μm*

Power and Electricity 4 kW, 400 V, 3p, 50 Hz

Compatible with various voltages.

*Varies by material type, feeding size, reduction ratio, and moisture.

All rotating components are fully enclosed inside a protective cabinet for safer day-to-day operation.

The cabinet keeps moving parts out of reach while the system is running, giving the operator a more controlled and confident workflow.

Multiple emergency stop buttons are positioned around the machine so it can be stopped instantly from any side.

The enclosed layout is especially beneficial in wet grinding, helping keep the area cleaner and reducing unintended splash toward critical components.

The ÜNAL 70-liter closed-circuit ball mill with spiral classifier operates by combining wet grinding and classification within a single process loop. The sample is ground together with water inside the ball mill drum, forming a slurry. The discharge from the drum is directed to the spiral classifier, where particles are separated based on their settling behavior: the fine fraction that reaches the target size exits the system as product through the overflow, while the coarse fraction is conveyed by the spiral back to the mill for further grinding. This closed-circuit operating principle enables more stable product particle size and repeatable grinding performance during continuous operation. ÜNAL supplies this machine as the manufacturer, using its own in-house design and manufacturing infrastructure.