Polysius
High selectivity and low energy consumption for
tube mills, roller mills and HPGR systems
sepol® high-efficiency separatorHigh selectivity and low energy consumption for tube mills, roller mills and HPGR systems
The higher the demands placed on the quality of the ground material – and the lower the desired energy consumption of the overall grinding system – the more decisive the efficiency of the separator becomes. The sepol® high-efficiency separator is built precisely for this: a sharp, selective cut at low specific energy, for grinding systems equipped with tube mills, roller mills and high-pressure grinding rolls.
What defines a future-proof separator
These are the requirements of a future-proof system configuration – and precisely what the sepol® fulfils:
High availability
High selectivity – a sharp separation cut
Low specific energy consumption
Simultaneous product separation, cooling and drying
Short amortization periods
Relatively low capital expenditure
1,000+
sepol® separators installed worldwide – confirming a proven functional principle
How the sepol® works
The sepol® is an air classifier whose only rotating part is a cage rotor driven by a variable-speed motor. Feed material and conveying air pass a surrounding guide-vane system that directs the air evenly and tangentially around the rotor.
In the classification zone between guide vanes and rotor, the rotating rotor generates a centrifugal force: coarser particles are thrown outward against the guide vanes and drop to the coarse-material outlet (grits) for regrinding, while the fine particles stay suspended in the air, pass through the rotor and leave with the air stream as finished product.
The cut size – the fineness of the finished product – is set precisely via the rotor speed, which gives the sharp, selective separation the sepol® is known for. Because separation, cooling and drying can take place at the same time, the separator integrates seamlessly into modern, energy-efficient grinding circuits.
Applications
The sepol® plays a key role wherever high fineness and low energy consumption matter:
Tube mills (ball mills): as the classifying stage in closed-circuit grinding.
Roller mills: for example integrated with the quadropol® vertical roller mill.
High-pressure grinding rolls: for example in combi-grinding systems with the polycom®.
Lowering the clinker factor
Upgrading an existing separator is one of the most effective levers for reducing the clinker factor in ball-mill-based grinding plants – improving both sustainability and cost-effectiveness. A dedicated International Cement Review article shows the upgrade options for existing separators, including the technical requirements and potential bottlenecks, and how they help producers move to more sustainable, cost-effective cement production.