Separation method of mixture

A separation method for mixture can be used to separate out particular component or particles from mixture and includes thin-layer or column chromatographic method. it features that an AC voltage is applied to the mixture in the direction perpendicular to the moving direction of mixture for forming an electric field while a gradually intensified or weakened magnetic field parallel to said moving direction is applied. Regulating the AC frequency can make the separated particles vibrating by maximal amplitude.

Chromatographic separation method

A chromatographic separation method for mixture includes thin-layer chromatography and column chromatography, and features that an alternative electric field is applied to the mixture to be separatedin the direction perpendicular to the direction of mixture moving, the frequency of alternative electric field is regulated to make the particles to be separated out have maximal vibration amplitude,and a magnetic field is applied to said mixture in the direction parallel to the direction of mixture moving.

Separation of mixture

Spraying material for metal mold and spraying process thereof

The invention discloses a spraying material for a metal mold and a spraying process thereof, belonging to the technical field of metal mold casting. Raw materials of the spraying material comprise zinc oxide, water glass and deionized water. The spraying process comprises the steps of preparing a coating, cooling a mold, spraying and preheating and fixing. As zinc oxide, water glass and deionized water are used as the metal mold coating and a unique design of the spraying process is adopted, thermal shock to the metal mold caused by molten metal can be lightened in the casting process, direct scouring to a casting mold surface caused by liquid metal is isolated, and a casting is prevented from adhering the mold; when the casting is taken out, frictional damage of the casting to the metal mold and a mold core can be reduced and the casting is easily taken out of the mold; the cooling speed of all parts of the casting in the metal mold can be adjusted and the solidification-feeding sequence ...

Aluminum alloy vacuum welding method capable of eliminating silicon segregation

The invention discloses an aluminum alloy vacuum welding method capable of eliminating silicon segregation. The method comprises the following steps of: (1) preheating, namely assembling aluminum alloy to be welded and aluminum-silicon solder, placing parts into a vacuum brazing furnace, heating the parts to 200 to 300 DEG C at the heating speed of 8 to 10 DEG C/s, and preserving heat for 20 to 40 minutes at the vacuum degree of 5*10<-2> Pa; (2) breaking a membrane, namely heating to 530 to 550 DEG C at the heating speed of 6 to 9 DEG C/s and preserving heat for 20 to 40 minutes at the vacuumdegree of 5*10<-3> Pa; (3) welding, heating to 600 to 620 DEG C at the heating speed of less than 5 DEG C/s and preserving heat for 60 to 90 minutes at the vacuum degree of 3*10<-3> Pa; and (4) cooling, namely cooling the welded parts to 520 to 540 DEG C along with the furnace, taking out the parts, and performing air-cooling on the parts to room temperature. Vacuum brazing process parameters arecontrolled ...

Preparing and painting methods of coating of metal mould casting and rising system

The invention relates to preparing and painting methods of a coating of a metal mould casting and rising system. The preparing method comprises the following steps: mixing anhydrous zinc oxide, sodium silicate and anhydrous asbestos powder, after stirring to be uniform, pouring into deionized water with temperature of 65-75 DEG C, and stirring until being completely uniform while pouring. The painting method comprises the following steps: pouring a prepared coating; preheating a mould subjected to sand blasting; painting the mould casting and rising system by using the coating, with thickness of 0.3-0.5 mm; controlling the thickness of the coating of a riser to be 1-3 mm; preheating and fixing, charging the painted metal mould into an insulation furnace for being baked, preheating until the work temperature of the mould is 350-420 DEG C, and keeping for 1-2 hours. According to the coating prepared by adopting the preparing method and the painting method, the casting defects of insufficient ...

Greenhouse distillation purification apparatus and greenhouse distillation purification method

The invention relates to the seawater desalination technique. Aiming at the complex process and expensive equipment of the prior art, a greenhouse distillation purification device is provided and comprises a sealed container used for containing seawater; the wall of the container of the sealed container is made from transparency material and is used for using the solar radiation so as to generate greenhouse effect in the sealed container. The device is characterized in that the sealed container also comprises a top cap, and the inner surface thereof is provided with a plurality of cone-like tubes with downward tips; the interior of the sealed container also comprises a plurality of collecting pipes slantways arranged under a plurality of cone-line tubes; and the parts of the collecting pipes corresponding to the cone-like tubes are provided with a header tank used for collecting water drops which are gathered and dripped by the tips of the cone-line tubes and is discharged by water ends ...