A method of creating a zone of high-gradient magnetic field in a Kittel open domain structure is disclosed. The method is based on a magnetic system of an open domain structure type and is embodied in the form of two substantially rectangular constant magnets which are mated by the side faces thereof, whose magnetic field polarities are oppositely directed and the magnetic anisotropy is greater than the magnetic induction of the materials thereof. The magnets are mounted on a common base comprising a plate which is made of a non-retentive material and mates with the lower faces of the magnets, thin plates which are made of a non-retentive material, are placed on the top faces of the magnets and forms a gap arranged above the top edges of the magnets mated faces. A nonmagnetic substrate for separated material is located above the gap.

A weak magnetic force magnetic separator, including: a belt conveyor conveying separation target particles; and a suspended magnet unit provided at a distance above the belt conveyor and configured to magnetically attract, with a uniform, weak magnetic force, the separation target particles conveyed over a belt. With a length of the magnet unit in its longer direction being greater than a belt width of the belt, and with the magnet unit placed such that its longer direction is aligned with the belt width direction and its both ends overhang the belt width, and such that a distance from the surface of the belt is constant across its longer direction, magnetic flux density variations in the belt width direction over the belt surface facing the magnet unit are 10% or less within a weak magnetic force range of from over 0 to 700 gauss.

A weak magnetic force magnetic separator, including: a belt conveyor conveying separation target particles; and a suspended magnet unit provided at a distance above the belt conveyor and configured to magnetically attract, with a uniform, weak magnetic force, the separation target particles conveyed over a belt. With a length of the magnet unit in its longer direction being greater than a belt width of the belt, and with the magnet unit placed such that its longer direction is aligned with the belt width direction and its both ends overhang the belt width, and such that a distance from the surface of the belt is constant across its longer direction, magnetic flux density variations in the belt width direction over the belt surface facing the magnet unit are 10% or less within a weak magnetic force range of from over 0 to 700 gauss.

Disclosed are methods and devices that are useful for processing water-including waste such as wastewater and sludge by reacting the water-including waste with an amount of ferromagnetic powder, an amount of anionic flocculant and an amount of cationic flocculant forming ferromagnetic waste particles suspended in water of the fluid waste, the ferromagnetic waste particles subsequently separated from water of the fluid waste by application of a magnetic field.

Disclosed are methods and devices that are useful for processing water-including waste such as wastewater and sludge by reacting the water-including waste with an amount of ferromagnetic powder, an amount of anionic flocculant and an amount of cationic flocculant forming ferromagnetic waste particles suspended in water of the fluid waste, the ferromagnetic waste particles subsequently separated from water of the fluid waste by application of a magnetic field.

The invention relates to a device for separating elongate magnetizable objects from a material stream by length. The device includes a magnetic field, which magnetic field is homogeneous in a field zone; a transport device with a transport surface for carrying the material stream through the field zone in a transport direction, wherein the field direction in the field zone is oriented at right angles to the transport direction; and a separating device for carrying the elongate magnetizable objects separated by length out of the field zone in a separation direction, which separating device includes at least one take-up element which travels a path running at least partially through the field zone. In the path in the field zone the minimum distance between the at least one take-up element and the transport surface is a first distance which is smaller than or equal to the greatest main dimension of a cross-section of the field zone parallel to the transport surface. The invention also relates to a method for separating elongate magnetizable objects from a material stream by length.

The invention relates to a device for separating elongate magnetizable objects from a material stream by length. The device includes a magnetic field, which magnetic field is homogeneous in a field zone; a transport device with a transport surface for carrying the material stream through the field zone in a transport direction, wherein the field direction in the field zone is oriented at right angles to the transport direction; and a separating device for carrying the elongate magnetizable objects separated by length out of the field zone in a separation direction, which separating device includes at least one take-up element which travels a path running at least partially through the field zone. In the path in the field zone the minimum distance between the at least one take-up element and the transport surface is a first distance which is smaller than or equal to the greatest main dimension of a cross-section of the field zone parallel to the transport surface. The invention also relates to a method for separating elongate magnetizable objects from a material stream by length.

An apparatus for processing magnetite iron ore, including an upstream cyclone and a mill for grinding particles, wherein the upstream cyclone is arranged to operate as a splitter by diverting material in an overflow of the upstream cyclone to bypass the mill and by feeding material in an underflow of the upstream cyclone to the mill.

An apparatus for processing magnetite iron ore, including an upstream cyclone and a mill for grinding particles, wherein the upstream cyclone is arranged to operate as a splitter by diverting material in an overflow of the upstream cyclone to bypass the mill and by feeding material in an underflow of the upstream cyclone to the mill.

Disclosed are methods and devices that are useful for processing water-including waste such as wastewater and sludge by reacting the water-including waste with an amount of ferromagnetic powder, an amount of anionic flocullant and an amount of cationic flocullant forming ferromagnetic waste particles suspended in water of the fluid waste, the ferromagnetic waste particles subsequently separated from water of the fluid waste by application of a magnetic field.