SU1641426A1 - Hydraulic classifier - Google Patents

Abstract

This invention relates to the classification of particulate materials. The goal is to increase the classification efficiency. The hydraulic classifier contains a housing (K) 1 with a lid 2 and a tangentially supplying nozzle (P) 3 installed in the lower part of K 1. Tangentially K 1 P 4 outlet of a large product is located in its middle part in the direction of rotation of the pulp. On the lid 2 K 1, at an angle to it in the direction of rotation of the pulp, is installed a P 5 outlet of fine product. Made To 1 in the form of a truncated reverse cone. On the lid 2 K 1, the projections 6 made in the form of a spiral are installed. The upper part K 1 is made with the slots 7 in the form of a helix (OHL). The direction of twisting of the spiral and the VL is opposite to the direction of rotation of the pulp. The projections 6 are located between P 5 and the upper edge of K 1. The grooves 7 are made between the upper edge of K 1 and P 4. The initial slurry of P 3 enters tangentially into K 1. The rotating flow rises along the wall of K 1, under the action of centrifugal forces large grains to the walls of K 1 and form a condensed slurry. In the upper part of K 1, coarse grains fall into the turns of the helix and VL formed by the protrusions 6 and grooves 7. Due to the frictional forces of the rotating flow and the guiding action of the walls of the helix and VL, the large product is countercurrently transported to P 4. 2 Il. se (L

Description

The invention relates to the processing of granular materials and can be used in the building materials industry.

The purpose of the invention is to increase the efficiency of classification.

FIG. 1 shows a hydraulic classifier in section; in fig. 2 is a plan view with an underlined image of a spiral on the lid of the apparatus.

The hydraulic classifier includes a housing 1 with a lid 2 and a tangentially inlet pipe 3 installed in the lower part of the housing 1. Tangentially the housing 4 in its middle part in the direction of rotation of the pulp is located the outlet 4 of a large product. On the lid 2 of the housing 1 at an angle to it in the direction of rotation of the pulp there is a pipe 5 for withdrawing a small product. Case 1 is made in the form of a truncated reverse cone. On the cover 2 of the housing 1, the projections 6 made in the form of a spiral are mounted. The upper part of the housing 1 is made with the slots 7 in the form of a helix. The direction of twisting of the helix and helix is opposite to the direction of rotation of the pulp. The protrusions 6 are located between the pipe 5 outlet of the small product and the upper edge of the housing 1. The grooves 7 are made between the upper chrome: l

S to

with:

Koy housing 1 and pipe 4 outlet of a large product.

Hydraulic classifier works as follows.

The initial slurry enters tangentially into the casing 1 through the inlet nozzle 3, the rotating flow rises along the wall of the casing 1, under the action of centrifugal forces, the coarse grains rush to the walls of the casing 1 and form a thickened slurry. In the upper part of the housing 1, the condensed slurry enters the coils of the spiral and helix formed by the protrusions 6 and the grooves 7, and due to the friction forces of the rotating flow and the guiding action of the spiral walls and helix are countercurrently transported to the outlet 4 of the large product.

Thus, in the lower part of the housing 1, the condensed product is transported to unloading by passing stream, and in the upper part - countercurrent, which is provided by means of conveying countercurrent spirals and helix. Small product

discharged through pipe 5 in cover 2 of housing 1.

Claims (1)

Invention Formula A hydraulic classifier comprising a housing with a lid, mounted in the lower part of the housing with a tangential inlet, located tangentially to the housing in the direction of rotation slurry a branch pipe for withdrawing a large product and mounted on the housing lid at an angle to it in the direction of rotation of the slurry a branch pipe for withdrawing small product, characterized in that, in order to increase efficiency of classification, it is equipped with protrusions mounted on the lid of the case and made in the form of a spiral, while the case is made in the form of a truncated reverse cone, the nozzle of large product is installed in the middle part of the case, and the upper part of the case is made with grooves in the form of a helical the direction of twist of the helix and helix is opposite to the direction of rotation of the pulp. Schig.1 four . - five FIG. 2