Device for screening crystals

 

(57) Abstract:

Usage: devices for sorting minerals. The inventive device for screening crystals containing a hopper for feeding the crystal holder of the crystal can be rotated relatively to the horizontal or vertical axis, the latch crystal, the flushing mechanism of the crystal in the receiver and an optical system that has at least one holder of the crystal and another retainer of the crystal, the tabs are made with a hole in the bottom with size, large size crystal holders crystal provided with a diaphragm with a hole whose size is smaller than the crystal, while the latches are installed on the holder of the crystal, made with the possibility of movement along the vertical axis and can be in the form of a funnel or cylinder, and the mechanism of drop crystal made in the form of a lever or plunger. 6 C. p. F.-ly, 4 Il.

The invention relates to means for sorting minerals and can be used mainly for screening crystals with a pair of parallel faces, for example having the shape of a cube, octahedron, parallelepiped, etc.

Know the mouth is nick crystals [1] In this device, the analysis of crystals for sorting is carried out during a free fall of the crystal through the optical system.

A disadvantage of the known device is the low efficiency of its use for screening, for example, crystal diamond on the content of impurity nitrogen, because the magnitude of the useful signal in the analysis depends on the orientation of the crystal relative to the beam, which is random, which leads to significant errors when sorting.

The closest known for the invention is a device for screening crystals containing a hopper for feeding the crystal holder of the crystal can be rotated relatively to the horizontal or vertical axis, the latch crystal, the flushing mechanism of the crystal in the receiver and the optical system comprising a radiation source and located along the radiation optics for forming radiation and the photodetector [2] In this device, a load operation, measurement and sorting are performed sequentially in a single holder.

The disadvantage of this device is the low productivity of the sort.

The technical result of the invention is to improve the performance of the sort.

The technical result is achieved in that the device for screening crystals, sod the school or vertical axis, the latch of the crystal, the flushing mechanism of the crystal in the receiver and the optical system comprising a radiation source and located along the radiation optics for forming radiation and the photodetector, is further provided with at least one holder of the crystal and another retainer of the crystal, the tabs are made with a hole in the bottom with size, large size crystal holders crystal provided with a diaphragm with a hole whose size is smaller than the crystal, with the clips installed on the holders of the crystal.

The best result is achieved when the size of the hole in the lower part of the retainer equal 1,01 1.2 size of the crystal.

The difference is that the holders of crystal made with the possibility of rotation about the vertical or horizontal axis.

Another difference is that the device is further provided with a mechanism for dropping the crystal, and the latches is configured to move along the vertical axis.

In this case, the difference may be that the mechanism of drop crystal made in the form of a lever.

Another difference may be that the mechanism sbresini in the form of a funnel.

The difference may be in the fact that the catches made in the form of a cylinder.

As the experiments showed, the crystal orientation in the analysis is determined by the size of the holes in the lower part of the retainer. In particular, the diamond crystals when the claimed size of the holes fall on the holder of one of the pairs of parallel faces.

The ability to move the tabs along the vertical axis facilitates the replacement of the working set of tabs.

In Fig. 1 schematically shows the inventive device of Fig. 2 a top view; Fig. 3 the mechanism of drop crystal in the form of a lever; Fig. 4 - the mechanism of drop crystal in the form of a pusher.

The device has an optical node including, for example, source 1 UV radiation, a system of lenses and mirrors 2, filter 3 and the photodetector 4, the holders 5 crystals with a diaphragm 6 and the projection 7 installed along the perimeter of the circular horizontal table 8 made with the possibility of rotation on 360 degrees. around the Central axis OO. Such holders may not be less than two, this device is made of six holders. On the table 8 above each holder 5 has a removable retainer 9 crystal position, made for example in the form of a funnel, Cristallo. The actuator device is made in the form of an electromagnet 11 with a movable rod 12 which is connected with the stop 13. The device has a hopper with metering device 14, for example a vibrating hopper with dvoryanin electromagnetic feeder, the feed crystals individually. The holders 5 crystals can be executed with a possibility of rotation in the horizontal plane, or can be rotated around a horizontal axis AA by an angle sufficient to crystal slid off the holder in the receiver (not shown). In the first case, the rotation of the holder 5 is provided with the cooperation of the protrusion 7 of the holder 5 with the stop 13 of the rolling stock 12 of the electromagnet, in the second case, the rod 12 is connected with the loose on the horizontal axis of the end holder 5.

The device may be accomplished by flushing mechanism of the crystal in the form of a lever 15 (Fig. 3) or of the pusher 16 (Fig. 4).

The device operates as follows.

Crystals of the source material from the hopper 14 to one under gravity fall through a chute (not shown) in one of the tabs 9 and placed over the aperture 6 of the holder 5. System emitter - receiver optical node proizvodyashchego material taken diamond. The permissible content of nitrogen amplified signal exceeds the threshold of the electromagnet 11, the rod 12 is moved together with the stop 13, which rests upon rotation of the table 8, the protrusion 7 of the holder 5 of the analyzing crystal. The holder 5 is rotated around the vertical axis OO and crystal, deprived of the support, falls into the receiver. When the opposite result, the electromagnet 11 is not activated, the holder 5 during rotation of the table 8 remains stationary with respect to the crystal, and the dropping of the crystal occurs when the contact protrusion 7 with another fixed stop (not shown) in another branch of the receiver. By means of a spring (not shown), the holder 5 is returned to its original position.

In modifications of the device containing the mechanism of dissolution of crystals, the movement of the crystal in the receiver is under the influence of the stem 12 of the electromagnet 11 on the spring-loaded lever 15 or the plunger 16. The lever 15 or plunger 16, moving to the crystal, raise the latch 9, allowing the crystal to fall from the holder 5 into the receiver.

The device allows you to sort the crystal size of 0.3 to 10 mm when using removable clips with different holes is the Eraly signs, the presence or absence of which affects the magnitude of the useful signal. for example, by color, impurity content, etc.,

1. Device for screening crystals containing a hopper for feeding the crystal holder of the crystal can be rotated relatively to the horizontal or vertical axis, the latch crystal, the flushing mechanism of the crystal in the receiver and the optical system comprising a radiation source and located along the radiation optics for forming radiation and the photodetector, wherein it is further provided with at least one holder of the crystal and another retainer of the crystal, the tabs are made with a hole in the bottom with larger die size, the holders of the crystal is provided with a diaphragm with a hole whose size is smaller than the crystal, when the clips are installed on the holders of the crystal.

2. The device under item 1, characterized in that the size of the hole in the lower part of the retainer equal of 1.01-1.2 crystal size.

3. The device under item 1 or 2, characterized in that the clamps are designed to move along the vertical axis.

4. The device according to p. 3, characterized in that IU is aNISM drop crystal is made in the form of a pusher.

6. The device under item 1, characterized in that the tabs of the crystal is made in the form of a funnel.

7. The device under item 1, characterized in that the tabs of the crystal is made in the form of a cylinder.

 

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