High-frequency induction plasma device for preparing nano molybdenum powder

Abstract

The invention discloses a high-frequency induction plasma device for preparing nano molybdenum powder. The high-frequency induction plasma device comprises a feeder, a reactor, a collector, a cooler and a compressor which are connected in sequence, wherein a collector base is arranged below the feeder, the device further comprises a high-frequency power supply and a feeder support, and the feeder support is used for fixing the feeder and the high-frequency power supply; And the high-frequency power supply is connected with the reactor through a wire. Compared with an existing device, the power is smaller, the energy efficiency is higher, a collecting space is sufficient, and the nano molybdenum powder can be conveniently and rapidly discharged.

Description

technical field [0001] The invention belongs to the technical field of equipment for preparing nano-materials by plasma, and in particular relates to a high-frequency induction plasma device for preparing nano-molybdenum powder. Background technique [0002] High-frequency induction plasma has become one of the effective methods for spheroidizing refractory metal powder due to its advantages of high temperature, high energy density and controllable shape. The spheroidization rate of the ultrafine refractory metal powder obtained by the method is as high as 100%, and the spheroidization rate and particle size can be controlled by changing the feed rate, carrier gas rate, plasma pressure and other conditions. [0003] The traditional preparation method from molybdenum concentrate to molybdenum powder production has a very mature process, but the whole process has a long process flow and requires more equipment, and a large amount of waste water, waste gas, waste residue, etc. ...

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Problems solved by technology

[0003] The traditional preparation method from molybdenum concentrate to molybdenum powder production has a very mature process, but the whole process has a long process flow and requires more equipment, and a large amount of waste water, waste gas, waste residue, etc. will be generated during production, which is harmful to the environment and human body. adverse effects on health

Moreover, due to the high reduction temperature and long reduction time of the molybdenum powder prepared by the traditional method, the prepared molybdenum powder is mostly micron-sized, the shape is generally irregular, and there will be different degrees of agglomeration, which limits its application.

[0004] The physical and chemical properties of different metals are somewhat similar. The current plasma technology is not much for processing nano-spherical molybdenum powder, and the following problems generally exist: (1) The operating power of the plasma is too high, even as high as 100 kilowatts, and the energy efficiency is too low. Excessive energy consumption; (2) There is no complete solution to evenly add molybdenum powder raw materials. Unevenly adding molybdenum powder raw materials will cause the diameter of the produced molybdenum powder to be too large to meet the requirements. Some devices use feeding guns to add raw materials, which can be more convenient Add raw materials, but can not optimize the problem of evenly feeding raw materials; (3) The velocity of the plasma jet is very high, and the newly generated nano-molybdenum powder in the device moves very fast and the temperature is very high, so a large space is required to collect nano-molybdenum powder. However, the large space cannot unload the nano molybdenum powder conveniently and quickly, and it cannot take into account the large space collection and the convenient and fast unloading of the molybdenum powder.

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