RU2003375C1 - Hydraulic classifier - Google Patents

Abstract

Usage: for separating granular material by size when enriching minerals The essence of the invention in a hydraulic classifier, comprising a housing with a water supply pipe installed in its lower part, a grid and a charging device mounted in the middle part, a chamber for collecting a fine-grained fraction is made. The classifier is equipped with two narrowing unloading trays installed one above the other in the upper part of the body with outlet pipes and additional accessories attached to them The loading device is made in the form of a closed expanding tray with vertical flow dividers. The bottom of the expanding tray is made with transverse slotted holes for water supply, and its lower edge forms a gap with the opposite wall of the casing. The grid is placed vertically opposite the loading device between the casing and a chamber for collecting fine-grained fractions The upper discharge chute is connected by a bottom to the upper end of the mesh and communicated with the classifier housing, and the lower discharge tray - a chamber for collecting fines 3 u

Description

The invention relates to a mineral processing technique.

Hydraulic classifiers are known for separating materials by size in an upward flow of water 1. In order to increase the separation efficiency, water is supplied to the classifier separation chamber through an annular inlet. This creates a more even distribution of water and increases the classification efficiency. However, in these classifiers, significant entrainment of a large product with a small one is possible.

Closest to the proposed one is a hydraulic classifier, comprising a housing with a water supply pipe installed in its lower part, a grid and a charging device 2 mounted in the middle part, in which the entrainment of large particles in the upper part of the classifier of a grid with artificial bed grains reduces small product.

However, in this classifier, the installation of a lattice with a bed increases the hydraulic resistance of the apparatus, especially if there is an initial mixture of organic and clay impurities that are retained by the lattice with the bed. In this apparatus, the grid can be blocked by impurities and the classified material itself and the complete cessation of the operation of the apparatus.

The purpose of the invention is to increase the efficiency of separation of material by size, at the same time increases the reliability of the apparatus and provides an increase in the quality of products by removing organic impurities and clay fractions from them.

This goal is achieved in that the hydraulic classifier, which includes a housing with a water supply pipe installed in its lower part, a grid and a loading device mounted in the middle part, is equipped with a fine-grain fraction collection chamber and two discharge chutes stacked on top of each other in the upper part of the body with outlet pipes and additional pipes connected to them, while the loading device is made in the form of a closed expanding tray with a vertical With the flow dividers, the bottom of the expanding chute is made with transverse slit openings for water supply, and its lower edge forms a slit gap with the opposite wall of the casing, the grid is installed vertically opposite the loading device between the casing and the chamber for collecting the fine-grained fraction, the upper discharge chute is connected bottom with an upper end and communicated with the housing, and the lower discharge chute with a chamber for collecting fine fractions.

In FIG. 1 shows a hydraulic classifier; figure 2 is a section aa in figure 1; in FIG. 3 is a section BB in FIG. 2.

The classifier comprises a housing 1, a water supply pipe 2, a mesh 3, a loading device 4 and a chamber 5 for collecting fine particles. Unloading trays 6 and 7 s are made in the upper part of the housing

5 with outlet pipes 8 and 9 and additional pipes 10 and 11 connected to them. Flow dividers 12 are installed in the loading device. In the bottom 13 of the loading device, slotted holes 14 are made, and the bottom edge 15 of the bottom forms a slotted hole with the opposite wall 16 the gap 17. The mesh 3 is installed vertically opposite the loading device in front of the chamber 5 for collecting fine particles. The upper discharge tray 6 is connected by a bottom 18 to the upper end of the grid 3 and is in communication with the classifier housing.

The classifier works as follows

0 way.

The slurry through the loading device 4 enters the housing 1. Through the slotted holes 14, a stream of water is directed into the housing to wash out fine sand

5 particles from under large. Large particles with a portion of small non-washed through the gap 17 are lowered into the nozzle 2, where the remaining small particles are washed. The enriched coarse product is removed from the apparatus.

0 The particle flow in housing 1 approaches grid 3, where particles are separated larger than the gaps between the rods of the grid, with heavy large particles of the product dropping along the grid and passing into path 5 cutting 2, and light large particles of debris rising along the grid and leaving through the slurry pipe. Fine particles of the material to be separated pass through the net into the nozzle.

0 The classifier allows one to completely isolate from the initial mixture and eliminate material losses larger than a given boundary grain, virtually eliminate the clogging of a large product by small

5 particles and organic impurities. The fine product is also obtained substantially free of organic impurities. By creating better separation conditions, it is possible to significantly reduce the size and weight of the device.

The use of beating jets and special shapes of nozzles reduces the wear of the classifier nodes, preserving its operability both in terms of the duration of operation and the quality of separation. By simplifying the maintenance of the inspection grid, downtime is reduced and the claims are reduced.

A HYDRAULIC CLASSIFIER, comprising a housing with a water supply pipe installed in its lower part, a net and a charging device installed in the middle part, characterized in that, in order to increase the separation efficiency, it is equipped with a fine-grain collection chamber and two closed narrowing ones mounted one above the other in the upper part of the casing with unloading trays with outlet pipes and additional water supply pipes connected to them, while the loading device

5

The productivity of the materials mined is being recognized.

(56) 1. USSR author's certificate N: 117250, cl. B 03 B 5/62, 1958.

2. Copyright certificate of the USSR No. 778804, cl. B 03 B 5/62. 1980.

The assembly is made in the form of a closed expanding tray with vertical flow dividers, the bottom of the expanding tray is made with transverse slotted holes for water supply, and its lower edge forms a slotted gap with the opposite wall of the casing, the grid is installed vertically opposite the loading device between the casing and the camera for collecting the fine-grained fraction, the upper discharge chute is connected with the bottom to the upper end of the wall and communicated with the housing, and the lower discharge chute is in communication with the collection chamber Christmas tree fractions.

Initial slurry

Sludge

14 17

FIG. 2

G - B

# fjtod # a.fl weight mixture

1 .

V

o

ftpyrfHbrtJ pro

3 5

10

eleven

SA

Small product sludge

Fig.Z