SU1162497A1 - Hydraulic classifier unloading device - Google Patents

Abstract

UNLOADING DEVICE OF HYDRAULIC CLASSIFIER, including sand discharge pipe with loading nozzles, valve, float connected by a system of levers to the valve, characterized in that, in order to increase the extraction of the useful component and reliability of the device by adjusting the density of the discharged separation products, the valve is installed in discharges and discharged of the useful component and reliably operating the device by adjusting the density of the discharged separation products. the pipe of sands is lower than the loading pipes into it, while the height of the loading pipes does not exceed half the height from the point of entry into them dog (L kov to drain threshold hydraulic classifier.

Description

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The invention relates to the enrichment of minerals, mainly to hydraulic classifiers-declarators with siphon sand discharge, and can be used in the enrichment of ferrous and non-ferrous metals.

A siphon device for unloading sands of a hydraulic Deschlamator classifier is known, which includes a vertical pipe with an expansion in the lower part and a cylindrical glass in the top, a discharge pipe, a float, a system of levers, and the glass is equipped with a piston with a rod 1. ,

The disadvantages of this device are the siphon failures during the operation of the hydroclassifier due to the low piezometric height of the siphon, as well as the low degree of declamation.

The closest to the invention according to the achieved result is the load device of the hydraulic classifier, including sand discharge pipe with loading pipes, a valve, a float connected by a lever system to the C2 valve.

The disadvantages of the known device are mutual clogging of separation products, the difficulty of maintaining the classifier's reliable operation when the position of the valve pipe is uncertain as to the piezometric difference between the levels of drain and sand extraction.

The purpose of the invention is to increase the recovery of the useful component and the reliability of the device by controlling the density of the discharged separation products.

This goal is achieved by the fact that in the unloading device of the hydraulic classifier, including sand discharge pipe with loading pipes, a valve, float connected by a system of levers to the valve, the valve is installed in the sand discharge pipe below the loading pipes opening, the height of the loading pipes is not It blocks half the height from the point where the sand enters them to the drain threshold of the hydraulic classifier.

FIG. I shows a diagram of a classifier with a discharge device; in fig. 2 - dependence of extraction in the discharge of the class - 0.070 mm on the solid content in the sands.

The discharge device consists of a vertical pipe 1, loading pipes 2 sands, a valve 3 installed in pipe 1 below the loading pipes 2 injected into it. Valve 3 is connected to the float 5 by means of a lever system 4 and is located above the entrance to the discharge pipe 6. Effective float density is regulated by removable weights 7.

The height of the loading nozzles 2 does not exceed half the height h from the point of entry of sand into them to the drain threshold of the classifier.

The discharge device operates as follows

The hydroclassifying pulp is classified by density and size. A heavier component and larger particles settle down, thinner particles and with lower density merge across the threshold.

In the presence of upward water in the flow chamber classifying I, the ore particles entering there form a suspension. As soon as the density of the suspension exceeds the density of the float 5, it will emerge and through the system of levers 4 lift valve 3. Dense pulp (sand) through the loading nozzles 2. enter the discharge pipe 6. Plo; The float 5 and, consequently, the density of the pulp being discharged can be adjusted by removable weights 7 (the volume of the suspension in the chamber is regulated by changing the flow rate of the rising water). When the level of dense suspension changes, the position of the float 5 and the valve 3 associated with it will change. Changing the position of valve 3 above the inlet to the discharge channel of pipe 6 will change the pulp flow through the discharge device. When unloading the whole dense suspension from the chamber, the float 5 goes down, the valve 3 will block the entrance to the discharge channel of the pipe 6.

The positive effect of the proposed device is that at a stationary flow rate of additional upward water, the process of unloading chamber products is automatically controlled, and the classification process is accompanied by the creation of dense

, suspensions (up to 70 wt.%} and their unloading, which is provided by positioning the valve and loading nozzles. This improves the efficiency {classification, increases the reliability of the device and extends the range of control of the unloading density of chamber products, unloads sand g / cm

Comparative tests of the known and proposed unloading devices show that it is applicable. The invention allows to increase the recovery in the discharge class - 0.07 mm to 80% (in the sands of the proposed system

(2.5% in the sands of a known 8.2%), increase the solid content in the sands of chamber products up to 50% by weight and exclude from the scheme of increasing the operation of thickening sand in hydrocyclones, feeding them directly onto the jet concentrators, and increasing the extraction of component in the sand at 15-20% of the operation O tsni (figure 2).

The table shows the granulometric composition of the feed, sand & a and sand I-VI chambers of hydro-classifiers, equipped with known and 15 proposed discharge devices.

Famous Classifier

the absence of the product in the first chamber is due to the small yield of the chamber product at a density of 50%. Add. 6offa ftii.i Morning Pumpy

Claims (1)

UNLOADING UNIT OF A HYDRAULIC CLASSIFIER, including a sand unloading pipe with loading nozzles, a valve, a float connected by a lever system with a valve, characterized in that, in order to increase the extraction of the useful component and the reliability of the device by adjusting the density of the unloaded separation products, the valve is installed in the unloading sand pipe below the input of the loading nozzles, while the height of the loading nozzles does not exceed half the height from the point of entry of sand to the drain threshold of the hydraulic classifier. ,. SU. „. 1162497