Abstract: Hydrocyclone comprising a ceramic cyclone head with at least one feed inlet, a upper outlet, and a head chamber a ceramic cyclone main body with a lower outlet and a main chamber, wherein ceramic cyclone main body is connected to the ceramic cyclone head so that the head chamber is in fluid communication with the main chamber; a metal enclosure with a corresponding feed inlet opening and corresponding outlet openings; wherein the metal enclosure comprises at least an upper metallic enclosure part adapted to enclose at least part of the ceramic cyclone head and a main metallic enclosure part adapted to enclose at least a part of the ceramic cyclone main body, wherein the upper metallic enclosure part comprises circumferential threads in a lower section thereof and the main metallic enclosure part comprises circumferential threads in an upper section thereof, wherein said circumferential threads are mateable.