Cyclically-cooled metal powder evaporation preparation device

Abstract

The invention belongs to the technical field of metal powder preparation devices, and particularly relates to a cyclically-cooled metal powder evaporation preparation device. The cyclically-cooled metal powder evaporation preparation device comprises a furnace, a crucible, a plasma torch, a collector and a heat exchanger. A crucible opening cover is arranged on an opening in the upper side of the crucible. A nozzle of the plasma torch penetrates through the crucible opening cover and extends into an inner cavity of the crucible. The outer surface of the portion, in the crucible opening cover and the crucible, of the nozzle is coated with a jacket made of a high-temperature-resistant material. A heat insulation material is arranged between the furnace and the crucible. A gas-solid separator is installed on a gas outlet of the upper side of the collector. A cooling pipe led out of the gas outlet of the gas-solid separator is sequentially connected with a suction fan and the heat exchanger, penetrates through the furnace and the heat insulation material and is communicated with the inner cavity of the crucible through a gas inflow channel in the crucible opening cover. A discharging pipe of a storage barrel and a feeding pipe of the collector penetrate through the furnace and the crucible opening cover and are communicated with the inner cavity of the crucible. The cyclically-cooled metal powder evaporation preparation device has the advantages that cooling gas is cyclically used, energy consumption is small, purity is high, and the device is suitable for preparing high-purity ultra-fine metal powder.

Description

technical field [0001] The invention belongs to the technical field of metal powder preparation devices, in particular to a circulating cooling metal powder evaporation preparation device. Background technique [0002] After the ultrafine powder is generated into solid ultrafine powder particles by the gas phase particle generator, due to its high temperature, it must be cooled before entering the collector. The existing technology uses cooling gas to cool the ultrafine powder, that is, the cooling gas is sprayed into the middle of the particle generator and the collector of the gas phase method to cool the surface of the coated ultrafine powder formed by the cooling gas. The disadvantages are: first, the cooling The gas consumption is large, and the material consumption and energy consumption are high; the second is that the distance between the nozzle of the plasma spray gun and the metal particles in the crucible in the furnace body is relatively large, and the energy con...

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