The disclosure relates to a roller crusher including a first grinding roll and a second grinding roll, the first and second grinding rolls being arranged generally in parallel to each other and to define a crushing gap therebetween and drivable in a counter-rotating manner. The roller crusher includes a device of a first type for loosening granular material present on a crushing surface of at least one of the rolls, the device including at least one rotatable disc element. The subject further relates to a roller crusher, wherein the plurality of disc elements is individually rotatable.

The disclosure relates to a roller crusher including a first grinding roll and a second grinding roll, the first and second grinding rolls being arranged generally in parallel to each other and to define a crushing gap therebetween and drivable in a counter-rotating manner. The roller crusher includes a device of a first type for loosening granular material present on a crushing surface of at least one of the rolls, the device including at least one rotatable disc element. The subject further relates to a roller crusher, wherein the plurality of disc elements is individually rotatable.

A roller crusher having two parallel rollers that rotate in opposite directions and are separated by a gap. At least one of the rollers has a flange at an end thereof. The roller crusher includes a material removal device having a rotatable cutter unit with a plurality of cutter elements arranged tangentially about the rotatable cutter unit at a radial distance from a rotational axis for the rotatable cutter unit. A rotation device rotates the rotatable cutter unit at an end of a roller having a flange. When the cutter unit is rotated by the rotation device, the cutter unit at least partially cuts away material accumulated on the flange and/or on the envelope surface at an end portion of the roller adjacent the flange. Each cutter elements presents an impact surface that faces the material to be cut away and is a polycrystalline diamond (PCD).

A roller crusher having two parallel rollers that rotate in opposite directions and are separated by a gap. At least one of the rollers has a flange at an end thereof. The roller crusher includes a material removal device having a rotatable cutter unit with a plurality of cutter elements arranged tangentially about the rotatable cutter unit at a radial distance from a rotational axis for the rotatable cutter unit. A rotation device rotates the rotatable cutter unit at an end of a roller having a flange. When the cutter unit is rotated by the rotation device, the cutter unit at least partially cuts away material accumulated on the flange and/or on the envelope surface at an end portion of the roller adjacent the flange. Each cutter elements presents an impact surface that faces the material to be cut away and is a polycrystalline diamond (PCD).

A scraper device for a roller crusher including a rotatable multi head scraper unit having at least two scrapers arranged tangentially about the multi head scraper unit at a radial distance from a rotational axis. The scraper device further includes a rotation actuator to rotate the multi head scraper unit to allow use of one of scrapers at a time. The scraper device further includes at least one brake arrangement to prevent and/or restrict rotation of the multi head scraper unit during operation of the one of the scrapers. Each of the scrapers includes a scraping element having a scraping surface formed from a polycrystalline diamond (PCD). 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. A roller crusher including the scraper device and a method for operating the roller crusher is also provided.

A scraper device for a roller crusher including a rotatable multi head scraper unit having at least two scrapers arranged tangentially about the multi head scraper unit at a radial distance from a rotational axis. The scraper device further includes a rotation actuator to rotate the multi head scraper unit to allow use of one of scrapers at a time. The scraper device further includes at least one brake arrangement to prevent and/or restrict rotation of the multi head scraper unit during operation of the one of the scrapers. Each of the scrapers includes a scraping element having a scraping surface formed from a polycrystalline diamond (PCD). 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. A roller crusher including the scraper device and a method for operating the roller crusher is also provided.

A roller mill includes a scraper and at least one pair of grinding rollers, between which a grinding material can be reduced in size. The grinding rollers are carried by a chassis, wherein in a manner known per se, apart from a drive mechanism for a rotation movement of the grinding rollers, a mechanism for engaging and disengaging the rollers can also be present. The scraper includes a knife with a scraping edge which can be pressed against a surface of one of the grinding rollers. The scraper also includes a base which is assembled or can be assembled on the chassis, as well as a knife holder, to which the knife is fastened. The knife holder can be biased against the surface of the grinding roller relative to the base by way of a spring force and thus can be biased by this against the grinding roller.

A roller mill includes a scraper and at least one pair of grinding rollers, between which a grinding material can be reduced in size. The grinding rollers are carried by a chassis, wherein in a manner known per se, apart from a drive mechanism for a rotation movement of the grinding rollers, a mechanism for engaging and disengaging the rollers can also be present. The scraper includes a knife with a scraping edge which can be pressed against a surface of one of the grinding rollers. The scraper also includes a base which is assembled or can be assembled on the chassis, as well as a knife holder, to which the knife is fastened. The knife holder can be biased against the surface of the grinding roller relative to the base by way of a spring force and thus can be biased by this against the grinding roller.

A scraper device for a roller crusher including a rotatable multi head scraper unit having at least two scrapers arranged tangentially about the scraper unit at a radial distance from a rotational axis. The scraper device includes a rotation actuator to rotate the multi head scraper unit to allow use of one of scrapers at a time. The scraper device includes at least one brake arrangement to prevent and/or restrict rotation of the multi head scraper unit during operation of the one of the scrapers. Each of the scrapers includes a scraping element having a scraping surface formed from polycrystalline diamond (PCD). 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. A roller crusher including the scraper device and a method for operating the roller crusher is also provided.

A scraper device for a roller crusher including a rotatable multi head scraper unit having at least two scrapers arranged tangentially about the scraper unit at a radial distance from a rotational axis. The scraper device includes a rotation actuator to rotate the multi head scraper unit to allow use of one of scrapers at a time. The scraper device includes at least one brake arrangement to prevent and/or restrict rotation of the multi head scraper unit during operation of the one of the scrapers. Each of the scrapers includes a scraping element having a scraping surface formed from polycrystalline diamond (PCD). 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. A roller crusher including the scraper device and a method for operating the roller crusher is also provided.