The invention provides an apparatus (10) for removing magnetic particles (53) from a liquid flowing from an oil or gas operation and method of use. The apparatus (10) comprises a plurality of magnet assemblies (20), each having a first condition in which an operable part is active to attract magnetic particles (53) to the magnet assembly (20), and a second condition in which the operable part is inactive and magnetic particles (53) are not attracted to the magnet assembly (20). A drive mechanism (13) moves the magnet assemblies (20) between exposure to a flow path of from a liquid (40) flowing from an oil or gas operation and a collection location (54). An activation means (36) moves the magnet assemblies (20) between the first condition and the second condition.

A multi-channel magnetic control system is provided, which is used for mixing fluids containing magnetic particles or separating magnetic species. In the multi-channel magnetic control system, a plurality of magnetic field switches are allocated to surround a plurality of channels, and the magnetization directions of the magnetic field switches are controlled to generate an uneven local magnetic field gradient, so as to achieve the purpose of fluid mixing or separating the magnetic species. This system can be also used as controllable flow resistance devices for magnetic fluids. Based on the demand of magnetic field distribution, overall or local control of the magnetic field switches can be executed to perform parallel processing over the multi-channel system of multi-dimensional allocation, so as to effectively save the processing time. The mixing or separation rate can be obtained via detecting residual magnetic species by magnetoresistive sensors arranged in inlets and outlets of channels.

A method is provided to clean glass mixed with non-glass undifferentiated trash. In the method, the glass pieces are kept as large as possible to thereby minimize the amount of surface area that needs to be cleaned. The glass pieces are cleaned without washing the glass pieces with water or a surfactant during the cleaning process. The non-glass contaminants are liberated from the glass by drying and abrasion, and then removed from the glass by screening and density separation.

A system and method for separating mixed materials employing a primary material separation deck and a secondary modular separation pathway for further separation of a portion, e.g. a three-dimensional portion, of the mix materials.

A system and method for separating mixed materials employing a primary material separation deck and a secondary modular separation pathway for further separation of a portion, e.g. a three-dimensional portion, of the mix materials.

A method of beneficiating iron ore streams, the method comprising the steps of sizing an iron ore stream to provide a fines fraction of less than 3.0 mm diameter particle size and contacting the fines fraction with a magnetic field and magnetically separating the fines fraction into a concentrate stream and a tailings stream.

A method of beneficiating iron ore streams, the method comprising the steps of sizing an iron ore stream to provide a fines fraction of less than 3.0 mm diameter particle size and contacting the fines fraction with a magnetic field and magnetically separating the fines fraction into a concentrate stream and a tailings stream.

A method for recovering metals from waste in which material is roughly or coarsely separated to leave a fibrous feedstock, the feedstock is comminuted with a mill (e.g., a ball mill) to liberate and separate the fibrous feedstock to obtain a mix of a metal fraction and residue, and the metals fraction and the residue are collected. There is a system employing the same to treat such materials.

A method for recovering metals from waste in which material is roughly or coarsely separated to leave a fibrous feedstock, the feedstock is comminuted with a mill (e.g., a ball mill) to liberate and separate the fibrous feedstock to obtain a mix of a metal fraction and residue, and the metals fraction and the residue are collected. There is a system employing the same to treat such materials.

A method for recovering metals from waste in which material is roughly or coarsely separated to leave a fibrous feedstock, the feedstock is comminuted with a mill (e.g., a ball mill) to liberate and separate the fibrous feedstock to obtain a mix of a metal fraction and residue, and the metals fraction and the residue are collected. There is a system employing the same to treat such materials.