48results about How to "Fast magnetic separation" patented technology

The invention provides a superparamagnetic nanosphere and a preparation method thereof, comprising SiO2 nanoparticles, a Fe3O4 layer and a SiO2 layer, the Fe3O4 layer uses SiO2 nanoparticles as a template to form a shell layer by in-situ growth of Fe3O4 nanoparticles, and the SiO2 layer is deposited on the outer surface of the Fe3O4 layer to form a cladding layer. The superparamagnetic nanospheres use colloidal SiO2 nanoparticles as templates, so that the size of SiO2@Fe3O4@SiO2 nanospheres can be adjusted by changing the size of template SiO2 nanoparticles; by in-situ growth on the surface of template SiO2 nanoparticles Coating Fe3O4 nanoparticles by means of a method greatly increases their loading density and simplifies the synthesis conditions. At the same time, the stability of Fe3O4@SiO2 nanospheres can be significantly improved by coating the outer surface of Fe3O4 layer with SiO2.

The invention discloses a copper doped composite magnetic nano-material and preparation and an application of the copper doped composite magnetic nano-material, and belongs to the fields of magnetic particle synthesis and water treatment research. Aiming at a solvent thermal synthesis process of magnetic nanoparticles, according to the invention, copper chloride and ferric chloride are taken as metal salt precursors, based on solvent thermal reaction, and through copper doping ratio adjustment, the obtained mesoporous Cu-Fe3O4 microspheres have controllable particle size (560nm-120nm), specific surface area (40-100m2 g-1) and surface charge amount, and have the characteristics of high monodispersity, uniform size, high magnetic property (130-65emu g-1) and the like, and show excellent adsorption and regenerative adsorption properties for pentavalent arsenic and trivalent arsenic in a water body. The mesoporous Cu-Fe3O4 microspheres are simple in preparation process, low in cost and high in arsenic adsorption property, can be quickly magnetically separated, and has a good application prospect.

The invention discloses a special RO-phase magnetic separator for steel slag micro powder. The special RO-phase magnetic separator comprises a separation cavity, an RO-phase collecting cavity and a magnetic bar component, wherein the RO-phase collecting cavity is formed in one side of the separation cavity and is a half-sealed cavity; an RO-phase discharge hole is formed in the lower part of the RO-phase collecting cavity; a plurality of groups of windows are arranged between the RO-phase collecting cavity and the separation cavity; the magnetic bar component penetrates through the windows, spans between the two cavities and is used for communicating the two cavities; the magnetic bar component structurally comprises a cylinder, a magnetic system shaft, a magnetic block, a chain wheel and a bearing. When the equipment is additionally arranged on an air tube, the RO-phase in the steel slag micro powder can be effectively adsorbed and separated, and the content of inert substances in the steel slag micro powder after RO-phase separation can be reduced to within 15% from about 35% at present.

The invention relates to a device and a magnetic separation method for reducing hematite-containing materials by microwave heat treatment and performing magnetic separation. The device includes a feed bin, a screw feeder, a star feeder, a preheating reaction furnace and microwave magnetic separation During magnetic separation, the material is crushed and then added to the silo. The powder enters the preheating reaction furnace through the screw feeder and the star feeder for preheating. The preheated powder enters the microwave magnetic separator through the air inlet pipe for further processing. Microwave heat treatment and magnetic separation; the product after magnetic separation is discharged from the discharge port through the ore discharge pipe, and other materials are discharged from the discharge port through the air discharge pipe. In the present invention, the weak magnetic Fe2O3 in the material is reduced to the strong magnetic Fe3O4 by microwave heating, and the iron concentrate is separated by magnetic separation, and the reduction and magnetic separation are integrated at the same time, the equipment is simple, the investment is small, the energy consumption is low, and the treatment Large amount; water saving, no air pollution, can process a variety of hematite-containing materials, including steel slag, low-grade limonite, iron ore and other ores, with a wide range of applications and good promotion prospects.