SU1102627A1 - Mechanical classifier - Google Patents

Abstract

MECHANICAL CLASSIFICATOR, including an inclined trough hull, a device for transporting sand, a loading nozzle, a drain threshold, a discharge cone nozzle, and with the aim of improving the classification efficiency and performance due to the redistribution of flows, the classifier is equipped with a vortex generator set transversely in the co-. dig and cut with an asymmetrical relatively to the trough axis located in the upper part,.

Description

Grain yards 7d / 7pa yffn7 SI f1 The invention relates to the beneficiation of minerals by size or density and can be used in the beneficiation of ores, coal and building materials. Known spiral classifier with a spiral not immersed, including a body in the form of a trough installed at an angle to the horizon, a spiral in the body, a loading device and a drain threshold C 2 The disadvantage of this device is the low classification efficiency when dividing the source material into two products, of which both the product is not final and requires additional enrichment. The closest to the invention in terms of technical implementation and the achieved result is a device that includes a housing in the form of an inclined trough, a device for transporting sand, located there, a loading pipe, a discharge threshold, a discharge cone 2, and two products are obtained by dividing the flow plum horizontal gate. A disadvantage of the known device is the low separation efficiency of sands and plums, as a result of which both of these products are mutually clogged with adjacent grains by density or size. The purpose of the invention is to improve the efficiency of classification and productivity due to the redistribution of flows. This goal is achieved by that the mechanical classifier, which includes the case in the form of a najun trough, located therein a device for transporting sand, loading pipe, drain threshold and a conical nozzle, is provided with a vortex generator installed across the trough and cut with an asymmetrical with respect to the trough axis located in the upper part. FIG. 1 shows a general view classifier; in fig. 2 shows section A-A in FIG. 1. The classifier consists of a case, filled in the form of a trough 1, installed at an angle k to the horizon, and located in it not immersed spiral 2, devices for loading 3, a discharge pipe for sands 4, a conical nozzle 5 for industrial production and a drain threshold 6. Before the drain the threshold is set to a vortex generator 7, made in the form of a partition, installed across the trough and made with an asymmetric cutout relative to the axis of the trough in the upper part. The operation of the classifier is carried out as follows. The initial mixture of mineral grains with water is fed through a loading device into the trough 1. The heaviest particles under the force of gravity are released in the sedimentation zone, spiral 2 is transported upwards and unloaded in the upper part of the trough through pipe 4. Light mineral grains and grains of intermediate size or density are transported through the rectangular cutout of the vortex generator 7 into the vortex zone, where the grains are of intermediate size or density by centrifugal action. Noah forces are entrained in the lower conical nozzle 5 and discharged from the trough. The main part of the water with light grains is poured over the drain threshold 6. By separating the coal spam, this device produced high-ash tails (sands), an intermediate product suitable as an energy fuel, and a drain for further enrichment. V. tab. t shows the particle size of the original sludge; in tab. 2 - the results of the processing of sludge in the known and proposed classifiers; in tab. 3 - the balance of separation products in the proposed classifier. Table 1

311026274

Compared with the known class, to improve the quality of circulating water using ficatra, the use of the proposed solid content and its ash content, the classifier increases the production — reduce the amount of sludge, postutum through the original slurry from 540 into external sedimentation tanks and half a day to 2500 l / h 4.6 times, the number of middlings that can honestly continuously output high-flotation, the ash in the sand increases

from 95.2 to 228 kg / h 2.4 times, with the economic effect of using a simultaneous increase in the ash rate of the spiral classifier

its from 73.6 to 75.2% and a decrease in moisture will amount to 266 thousand rubles. per year due

from 25.8 to 17.7%. This will allow for better performance.

Table 2

Proposed Classifier

1150 18724,257,8

Drain

Table 3

15.04,47t, 2

38.2 11,275,5

46.8 13,775,8

29,375.0

Claims (1)

MECHANICAL CLASSIFIER, including a body in the form of an inclined trough, a device for transporting sand located in it, a loading nozzle, a drain threshold, an unloading conical nozzle, and so that, in order to increase the classification efficiency and productivity due to the redistribution of flows, the classifier is equipped with a vortex generator installed transversely in the trough and made with a cutout asymmetric with respect to the axis of the trough located in the upper part,. / 7rOMP] 00 &! RG / tg 1102627 2