SU395172A1 - DEVICE FOR PRODUCING METAL POWDER - Google Patents

Description

one

This invention relates to the manufacture of powder materials.

A device is known for producing a powder from a molten metal, a plating rotating disk, to which the molten metal is fed.

However, upon receipt of powders of metals with a high melting point (from 500 to 1500 ° C), a very fast destruction of the upper and lower disk occurs, in practice, the installation works well only with metals that have a melting melt. (up to 300-400 ° C). In addition, the installation does not provide for the simultaneous production of a powder of a different fraction.

The purpose of the invention is to provide powders with a high m. Pl.

This is achieved by the fact that the disk is provided with a profiled insert of porous refractory material placed in an annular recess made in the disk, in addition, the disk has cavities located under the insert connected to a source of neutral gas, having a slight excess pressure; the bottom of the profiled surface of the insert is made with radial corrugations.

The drawing shows a diagram of the proposed device.

The device is a rotary disk /; a profile insert 2 of porous refractory material is installed in its annular groove. The disk / is fixed on the shaft 3, which serves to transfer the rotational movement from the actuator 4 through the coupling 5 to the disk /. Val 3 has

holes for connecting cavities in the disk / located under the insert 2, through the support 6 with a source of neutral gas, and a slight excessive pressure. Above the disk / furnace is located 7 with molten metal 8.

The device works as follows. In the initial position, the valve of the furnace 7 is closed, and the molten metal 8 does not leak. Drive 4 is turned on, and disk / and insert 2 are accelerated to the required revolutions. Next, in the cavity of the disk 1 under the insert 2 serves a neutral gas under a slight excess pressure through the support 6 and the shaft 3. The gas exits through the pores of the insert 2 to the outside. The furnace 7 is opened and the molten metal 8 hits the inner wall of the insert 2 profile, but due to the gas outlet and the rotation of the insert .2 it does not touch it: a gas cushion is formed which prevents the insert 2 from contact with the molten metal. Since the bottom of the profiled surface of the insert 2 is made with radial corrugations, the molten metal 8 is drawn into rotational motion. Under the action of centrifugal forces, the molten metal 8 but a gas hollow is thrown against the outer wall of the profile of the insert 2 n is thrown out over the edge of the wall with small drops of liquid, which during cooling form metal powder. The edge of the outer wall of the profile of the insert 2 can be made obliquely, then (due to the difference in heights of the outer wall of the profile, it is possible to get powder of different fractions simultaneously.

.4 The subject invention

Claims (3)

1. An apparatus for producing a metal powder containing a drive with vrash, enn, characterized in that, with the aim obtain powders with a high m. pl. it fitted with a profiled insert installed in an annular recess made on the disk, and in the disk along the perimeter of the insert there are cavities connected to the supply of neutral gas. 2. A device according to claim 1, characterized in that the shaped insert is made of a porous refractory material. 3. The device according to PP. 1 and 2, characterized in that the bottom part of the profiled insert is made with radial corrugations. Neutral gas