SU1479103A1 - Hydraulic classifier for fine granular materials - Google Patents

Abstract

The invention relates to the enrichment of non-metallic minerals. The goal is to improve the quality of classification products by optimizing the separation mode of classes of close size. A classification chamber / K / 3 is located above the conical soil collecting container 1 with a branch pipe / P / 2. It is connected by water distribution windows 4, evenly distributed in the lower part of K 3, with an annular collector 5 for supplying additional water. The latter has a tangential P 6. Over K 3 there is a receiving-separating K 7 with a tangential P 8 supplying the original power supply. Above K 7 there is an enrichment plant K 9 with an axial P 10 withdrawal of the fine product and a tangential P 11 withdrawal of the average product. Chambers 7 and 9 are made in the form of truncated cones connected by large bases. At that, P 8 is located in the wide part K 7, and P 11 in the narrow part K 9. In K 3 a rod 12 is installed with a conical tip 13. The original slurry through P 8 enters K 7, where a rotating pressure flow is created. The coarse fractions in K 3 are cleared of mechanically captured small grains and discharged from the soil collector 1 through П 2. The small fractions in K 9 are separated by a given boundary grain and discharged through P 10 and 11. Additional water is supplied through collector 5 and windows 4. Classifier It allows to divide the material into three products with a given optimal grain size distribution with high accuracy. 2 Il.

Description

The invention relates to the enrichment of non-metallic minerals, namely, devices for hydroclassification and enrichment of natural sands, and can also be used in the construction, glass industry, foundry, etc.

The purpose of the invention is to improve the quality of classification products by optimizing the separation mode of classes of close size.

FIG. 1 shows the hydraulic classifier, section; in fig. 2 shows section A-A in FIG. G.

The hydraulic classifier contains a conical soil collector 1 with a discharge pipe 2 of a large product, located above the soil collector 1 cylindrical classification chamber 3 with water distribution windows 4, located outside the chamber 3 and communicated with its cavity through the windows 4, an annular collector 5 for supplying additional water with a tangential pipe 6 located above the classification chamber 3 a receiving-separating chamber 7 with a tangential nozzle 8 for supplying the initial power supply and an enrichment chamber 9 for the axes m pipe 10 for removal of small product and tangential pipe 11 for removal of the average product. Inside the chamber 3, the rod 12 is coaxially mounted with the conical apex 13. The receiving-separation chamber 7 is made in the form of a truncated cone narrowing downwards. The feed supply nipple 8 is located in the wide part of chamber 7. The concentrating chamber 9 is also made in the form of a truncated cone, and the nipple 11 of the middle product is placed in the narrow part of the concentrating chamber 9. The receiving and separating 7 and the concentrating 9 chambers are interconnected by large base cones.

Hydraulic classifier works as follows.

The original pulp with different fractions of sand through the tangential nozzle 8 enters into the receiving-separation chamber 7 under pressure, creating a rotating flow in which under the action of centrifugal, hydrodynamic and gravitational forces an intensive distribution of fractions occurs in the desired radial-axial direction: coarse fractions - to the periphery and down, medium to the periphery and up, and small to the center and up. The enrichment chamber 9 enriches the middle product, i.e., separates adjacent fine fractions from it and withdraws them together with the small product through the nozzle 10, and the enriched and condensed middle product is removed through the tangential nozzle 11. Separate the middle and small products according to a predetermined boundary

0

the grain is achieved by changing the diameter of the nozzle 10.

In the cylindrical classification chamber 3 with a central rod 12 and water distribution windows 4, adjacent medium and fine fractions from a large product are washed out by an upward flow of water. At the same time, it is possible to obtain a high-quality large product at a given boundary grain by adjusting the speed of the upward flow of water in relation to the rate of sedimentation of large fractions. The classified coarse product enters the conical soil collection container 1 and leads out 5 with the nozzle 2. The additional water enters the chamber 3 through the water distribution ports 4 evenly from the annular collector 5, to which the pressure water is supplied by the tangential nozzle 6.

0 A receiving-separating chamber 7, made in the form of a truncated cone tapering downwards, serves to distribute the sand fractions in the required radial-axial direction, and the classification

5, a chamber 3 with a central rod 12 with a conical apex 13 and a collector 5 for supplying additional water contribute to accelerating and improving these processes by directing upward the flows containing small and medium fractions.

0 The concentration chamber 9, designed as a truncated cone tapering upwards, improves and accelerates the separation and enrichment process. the average product due to the intensive separation of fine fractions from it and outputting them through the axial patch5 of felling 10 as the peripheral speeds and the speed of the upward flow increase, as well as by excluding the ingress of large fractions into the enrichment chamber 9 with a significant increase in the flow rate and density of the original pulp.

0 The joining of chambers 7 and 9 with wide bases of truncated cones provides the necessary smooth transition of medium and small fractions from the receiving and separating 7 to the processing chamber 9.

5 A tangential-mounted branch pipe 11 for withdrawing an average product in the narrow part of the processing chamber 9 provides for a downstream rotation of the condensed pulp of an average product.

0 The tangential-mounted pipe 8 in the wide part of the receiving-separating chamber 7 creates a rotational flow with radial separation of sand into fractions.

Evenly spaced windows 4 in the lower part of the classification chamber 3 allow to achieve constant velocities of the upward flow of water. The cylindrical shape of the chamber 3 allows a uniformly upward flow of water to be achieved by creating an annular cross section between the shaft 12 and the wall of the chamber 3.

Thus, the hydraulic classifier allows, with small dimensions and additional water consumption, due to the maximum use of the combination factor of centrifugal and gravitational forces in the pressure-rotational upflow, to achieve an effective classification of the close by size classes of material to be divided, which ultimately allows to obtain finite products of optimal fractional composition.

Claims (1)

Invention Formula Hydraulic classifier of fine-grained materials, including a soil collector with a discharge pipe, a cylindrical classification chamber above the ground collector with an additional water supply pipe, a receiving-separation chamber above the cylindrical classification chamber with a tangentially located its wide part is the source power supply nozzle, located above the receiving / separating chamber, the enrichment chamber with the nozzle for discharging a small product in the form of a truncated cone attached by a large base to the wide part of the receiving and separating chamber, and the purpose of improving the quality of classification products by optimizing the separation mode of similarly sized classes, the hydraulic classifier is equipped with a rod with a conical tip, installed in the center of the cylindrical classification chamber, with and a collector for supplying additional water, the receiving-separating chamber being made in the form of a truncated cone, and the branch pipe for withdrawing the average product is tangentially installed in the narrow part of the processing chamber, while in the lower Part of the cylindrical classification chamber is made evenly distributed around the circumference of the window, indicating the cavity of the classification chamber and the collector for supplying additional water. Aa FIG. 2