SU1232279A1 - Apparatus for grinding metal waste - Google Patents

Description

The invention relates to the technique of grinding solid materials and can be used in non-ferrous metallurgy to obtain needle-shaped powders from non-standard wire, rolled metal and other waste after their recrystallization.

The purpose of the invention is to ensure the effective grinding of refractory metal.

FIG. 1 shows schematically a device for grinding metal waste, a general view; FIG. 2 is a section A-A in FIG. 1.

The device contains a metering hopper 1 for pre-crushing and supplying the raw material at a certain speed, the basement body in the form of a plate 2, the mechanism 3 for adjusting the inclination of the lower type of the body, the jack, the movable carriage 4 equipped with a roll system 5. notch in the form of teeth, the profile of which corresponds to the notch of the file. At both ends of each roll 5, pulleys 6 are fixed along the axis, moving between two parallel-mounted lags 7, the lower one of which is fixed and the upper one reciprocates from the drive. On the pulleys 6 there are rubber pads 8. To create an elastic pressing of the rolls to the lower working body, a screw 9 is used, which regulates the distance between the upper and lower lags. The metering hopper I contains a gear shaft 10 and a cheek 11. Plate 2 is made of highly hard and highly resistant material.

The device works as follows.

10-15 kg of recrystallized rolled wire or other waste of refractory metals, such as tungsten, are loaded into the metering hopper 1. There, the material is pre-crushed and fed to

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inclined plate 2. The feed rate of the material is regulated by a variable speed of rotation of the shaft 10 and the size of the gap between the shaft

5 10 and cheek 11. Rolls 5, rotating

each around its axis, moving reciprocatingly across the surface of the plate, having repeatedly affected the material. AT

10 as a result of repeated bends, the material is destroyed along the spontaneity planes of large blocks and gradually rolls down into the receiving bin.

15 Increasing the number of rolls improves device performance.

When grinding recrystallized molybdenum wire of MCH brand at the rate of material intake

20 from a metering hopper equal to 2 kg / h, the amplitude of the reciprocating movement of the rolls of 4 cm with a frequency of 1 count / s, using two rolls and a plate tilt of 30 °, is obtained

25 needle powder with dimensions of 120 x 240 microns.

The powders obtained using the proposed device have high purity. The content of this mixture is 30%: oxygen 0.04; carbon 0,2; iron 0,001.

Thus, the device for grinding the waste of refractory metals makes it possible to obtain highly 3J pure needle-shaped powders with a particle size of 100 to 500 µm. Powders obtained from non-standard waste after recrystallization can be used for plasma

40 coating, filtering, etc. The proposed device contributes to the creation of waste-free production of rolled metal, wire, other products of tungsten, molyb45, den, etc.

In addition, the device can be used to obtain powders from other fragile and hard materials - 5b catches.

FIG. 2

Claims (1)

DEVICE FOR GRINDING METAL WASTE, containing a hopper, a plate, rolls installed parallel to each other, the ends of which are connected with the mechanism of their reciprocating movement on the table, and a drive, characterized in that, in order to ensure efficient grinding of refractory metals, it is supplied. the wife is mounted with rubberized pulleys at the ends of the rolls, and the mechanism of the reciprocating movement of the rolls is made in the form of lags installed one above the other, the upper of which is connected to the drive, and the rubberized pulleys are located between the lags. a <£> -SU. "" 1232279 A1