Roller crusher and method for operation thereof

A scraper device for a roller crusher, comprising:

• a rotatable multi head scraper unit having at least two scrapers arranged tangentially about the rotatable multi head scraper unit at a respective radial distance from a rotational axis of the rotatable multi head scraper unit;
• a rotation actuator arranged to selectively rotate the rotatable multi head scraper unit to allow operative use of one of the at least two scrapers at a time;
• and
• at least one brake arrangement configured to prevent and/or restrict rotation of the rotatable multi head scraper unit during operation of the one of the at least two scrapers,
• wherein each of the at least two scrapers comprises a scraping element having a scraping surface which scraping surface comprises a polycrystalline diamond (PCD) and wherein the rotatable multi head scraper unit is structured and arranged such that each scraping surface at least partly faces in a tangential direction defined at the scraper surface and directed along a reference rotational direction of the rotatable multi head scraper unit,
• wherein the rotatable multi head scraper unit is arranged at a first end of the scraper device, and the rotation actuator is arranged at a second, opposite, end of the scraper device, and wherein the rotatable multi head scraper unit extends in a reference plane which is orthogonal to the rotational axis, and wherein each of the at least two scrapers has a surface facing the rotation actuator, which surface comprises a polycrystalline diamond (PCD).