SU1646624A1 - Pneumatic separator - Google Patents

Description

The invention relates to the enrichment of minerals, in particular coal and ores of small fractions in air.

The purpose of the invention is to increase the separation efficiency due to the intensity of the aerodynamic regime.

Fig. I shows the air separator, a general view; figure 2 - node G in figure 1: fig.Z - section aa in Fig.; Fig. 4 illustrates the assembly of the rings and the high pressure air nozzle.

The air separator consists of a housing 1, an air distributor 2, over which a sieve 3 is installed. An air diffuser. situated on. a receiver 4 supplied with a low pressure air duct (not shown). A loading device 5 is installed on top of the housing 1, and an unloading device made in the form of rings 6 installed with a gap 7 between them and rigidly connected by radially arranged blades 8 is mounted on the top of the housing. The rings 6 are fixed to the hollow shaft 9 connected through a wedge gear motor 10. A high-pressure air inlet 1I is attached to the air distributor 2, covering the air distributor with the formation of an annular gap 1 .. A high-pressure pipe 13 is connected to the nozzle 11. Receivers 14 are installed to collect the finished Fractions. In the upper part of the housing 1 there are nozzles 15 for air exhaust,

The separator works as follows.

The material to be separated is fed through the loading device 5 into the working area located above the sieve 3. High-pressure air enters through the annular gap 12 also

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into the work area. The low pressure air enters the working zone from the receiver 4 through a sieve 3. The separation of material but size in the working zone of the separator occurs under the action of, mainly, a low-pressure air jet. Depending on the speed of rotation of the drive, the blades 8 impart to the separated material particles the tangential component of the velocity, due to which particles of a certain size get the opportunity to overcome the resistance of the high-pressure air jet and exit into the discharge zone, i.e. into the zone of annular gaps 7, which they spill into receivers 14. The rate of air ejected depends on the size ratio of the gaps B and B and, besides, jamming of the particles discharged through the ring gaps is eliminated (since the gap b).

Making the annular gaps 7 tapering upwards allows an ejecting effect to be obtained, preventing a lean pulverized output; particles through the discharge device. To avoid spontaneous unloading of the material being blasted off, a high-pressure air inlet 1 is used. Making the annular slit 12 tapering upwards allows the effect of a high-pressure jet on the 1st material to be enhanced.

Claims (3)

Formula invention 1, Air separator, including a vertically located case with a loading device installed coaxially with it and in its upper part, a sieve located in the lower part of the case and coaxially with it, supply pipe for air under the air distribution panel and receivers of finished fractions, o l and h to shch and so that, with the purpose of increase effek. Separation is due to the integration of the aerodynamic mode, the separator is equipped with rings located above the sieve coaxially with each other, with a gap and coaxially to the body, interconnected by radially arranged blades and mounted with the possibility of rotation, and an air nozzle high on the pressure surrounding the air distribution 2. A separator according to any one of the preceding claims, characterized in that the annular gap between the high-pressure air pipe and the air distributor is narrowed upwards. 3. A separator according to any one of the preceding claims, characterized in that, in order to create an echoing effect, which prevents the emergence of dust-like particles through the discharge device, the basin between the rings is made narrowing upwards. litter to form colpea chips Yu Blown g low pressure FIG. / fi 3 and eleven