SU1572713A1 - Distributor for pneumatic classifier - Google Patents

Abstract

The invention relates to the pneumatic classification of various bulk materials and can be used for fractionation and enrichment in the mining, chemical, metallurgical, construction and other industries. The purpose of the invention is to improve the quality of material classification by expanding the range of control of the aerodynamic classification mode by the distributor. The distributor includes a housing with a distribution grid formed by a package of mounted one above another guides and sliding elements installed with the possibility of longitudinal movement relative to the housing and guides. The guides are mounted with the possibility of longitudinal movement relative to the housing. The guides and pull-out elements are made in the form of plates lying one on another. 1 hp f-ly, 2 ill.

Description

The invention relates to the pneumatic classification of various bulk materials and is intended to divide the grain between 50 and 5000 µm into two or more separation products and can be used for fractionation and enrichment in the mining, chemical, metallurgical, construction and other industries.

The aim of the invention is to improve the quality of material classification by expanding the control range of the aerodynamic classification mode by the distributor.

FIG. 1 shows a pneumatic classifier with the proposed distributor, a general view1, in FIG. 2 a section A-A in FIG.

The distributor includes a housing with a separation chamber 1, in the upper part of which there is a loading device 2, under which the distribution grid 3 is installed so that the material from the loading device enters its outer surface 4 (relative to the separation chamber) formed by a set of ends 5 of sliding elements in the form of plates 6 of the separation channels 7 of the distribution grid 3. The combination of the ends 8 of the guides in the form of plates 9 forms the inner surface of the distribution grid 3. The plates 6 9 are mounted one to the other without a gap with the possibility of longitudinal movement relative to one another and the housing. Plas L

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BEFORE

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Tines 6 and 9 are installed in slots 10, made in the side walls of the 1J housing. In the lower part of the separation chamber 1, there are a number of bins 12 for collecting the separation products. A separation chamber 13 is provided with a nozzle 13 for removal of a dust-air flow.

The distributor works as follows.

The source material from the loading device 2 is supplied to the outer surface 4 of the distribution grid 3. When it moves along the outer surface 4, the source material is conducted by a transverse air flow. sucked through the separation chamber 1 and the distribution grid 3. As a result, the starting material is gradually divided into large and small fractions. The coarse fraction is the material that continues to move along the outer surface 4 of the distribution grid. The fines fraction is the material that is carried by the transverse air flow through the separation channels 7 into the separation chamber 1.

After passing through the outer surface 4 of the distribution grid 3, the large fraction enters the finished large product. The quality of the finished large product depends on the duration of the separating effect of the transverse air flow, which is proportional to the height of the outer surface of the% distribution grid. 3. To improve the distribution of the material on the outer surface of the distribution grid, it is necessary to change the shape of the profile of the outer surface depending on the fractional composition of the starting material. This is achieved by longitudinal movement of the plates 6, the set of ends of which forms the outer surface of the distribution grid, i.e. Form a profile of this surface.

The fine fraction of the material is carried by the transverse air flow through the separation channels 7 into the separator j

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Under the influence of the force of gravity acting on the particles, the chamber 1 is gradually deposited on its bottom in% bunkers 12. In the air flow, large particles of the fine fraction are deposited faster than small particles. This makes it possible to produce in bins 12 a product of different size depending on the location of each bunker: the closer the bunker is to the inner surface of the distribution grid 3, the larger the particles of material in it.

In order for all particles of any monofraction to be deposited in one bin, it is necessary for all particles of nofraction to adjust the distance from the point of entry from distribution grid 3 to separation chamber 1 before this - bin depending on the height of the exit. This adjustment is achieved by changing the shape of the profile of the inner surface of the distribution grid 3, depending on the height. The change in the shape of the profile of the inner surface is carried out by moving the plates 9, which changes the place where the particles exit from the separation channel to the separation chamber. Optimal The shape of the profile of the inner surface is chosen experimentally. For various raw materials, the fractional composition is optimal. The shape of the profile of the inner surface is different.

Thus, due to the fact that the walls of the separation channels of the distribution grid are made of plates that are installed without a gap with the possibility of relative mutual displacement. and adjusted, depending on the height, the initial conditions for the movement of particles of mono fractions of the material in the separation the camera. All this allows to improve the quality of separation of various powdered materials.

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 Editor I. Gorna

Compiled by O. Popov Tehred M. Hodan h.

Order 1606

Circulation 521

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

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Proofreader S. Shekmar

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Claims (2)

1. A PNEUMATIC CLASSIFIER DISTRIBUTOR, comprising a housing with a distribution grid formed by a stack of rails and sliding elements installed one above the other, mounted with the possibility of longitudinal movement relative to the housing and rails, characterized in that, in order to improve the quality of material classification by expanding the control range of the distributor aerodynamic classification mode, guides set '| With the possibility of) longitudinal movement relative to the building sa. 2. The distributor according to claim 1, characterized in that the guides and sliding elements are made in the form of plates lying on top of each other.