Integrated device for preparing magnesium hydride powder and method for preparing magnesium hydride powder
A technology of magnesium hydride and atomizing device is applied in the field of magnesium hydride powder preparation and integrated device field for preparing magnesium hydride powder, which can solve the problems of inconvenient control of transfer reaction conditions of equipment materials and the like.
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[0072] figure 1 It is a structural schematic diagram of an integrated device for preparing magnesium hydride powder in a preferred embodiment of the present invention, including a heating chamber 1 , a powder making chamber 2 , a collecting chamber 3 and a reaction chamber 4 .
[0073] Wherein, the heating chamber 1 is used for heating the magnesium-based metal material to generate metal droplets of the magnesium-based metal material. The heating chamber includes a hatch 11 arranged on the top of the heating chamber 1 . The heating chamber 1 is connected with a vacuum pump 12 for evacuating the heating chamber 1 . The heating chamber 1 is also connected with an inert gas pipeline (not shown in the figure) for filling the heating chamber 1 with inert gas. The heating chamber 1 also includes a first container 13, which is a crucible for containing magnesium-based metal materials. A heating device 14 is provided around the first container 13, and the heating device 14 is an in...
Embodiment 1
[0079] In the present embodiment, the method for preparing magnesium hydride powder using the above-mentioned integrated device is as follows:
[0080] (a) Open the hatch 11 at the top of the heating chamber 1, put the magnesium-nickel alloy raw material block (wherein the content of nickel is 5wt%) in the first container 13 graphite crucibles, close the hatch 11; the heating chamber 1 is evacuated , fill with argon, and repeat 1 time; evacuate again to 10 -3 Pa, then fill the heating chamber 1 with 0.06MPa argon gas, and heat the graphite crucible to 800°C by controlling the heating device 14 to melt the magnesium-nickel alloy raw material in the crucible to form molten metal;
[0081] (b) The molten metal flows out through the sharp nozzle at the bottom of the crucible, and is atomized into powder droplets through 5MPa high-pressure argon gas in the powder making chamber 2, and is cooled to metal powder under the action of 20°C and 2MPa circulating cooling water;
[0082] (c)...
Embodiment 2
[0088] The method that present embodiment prepares magnesium hydride powder is basically the same as embodiment 1, and difference is only in:
[0089] The raw material block put in the step (a) is magnesium-aluminum alloy (wherein the content of aluminum is 3wt%), and the heating temperature is 650° C.;
[0090] The inert gas used in step (a) and step (b) is helium, the pressure of heating chamber 1 is 0.05MPa, and the pressure of high-pressure helium is 1MPa;
[0091] The temperature of the circulating cooling water in the step (b) is 50° C. and the pressure is 0.5 MPa;
[0092] In step (d), the hydrogen pressure is 1 MPa, the hydrogenation temperature is 400° C., and the hydrogenation time is 20 h.
[0093] Compared with the powder obtained in Example 1, the powder obtained in this embodiment is all spherical magnesium hydride powders with uniform size, and the shape is complete, such as Figure 6 shown.
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Abstract
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