SU1720713A1 - Device for gravitational separation of mineral particles - Google Patents

Abstract

This invention relates to the beneficiation of minerals. The goal is to increase the efficiency of the separation process. The device contains a water-filled liquid. bone (E) in the form of coaxial cylinders 1 or coaxial cones, or coaxial spherical surfaces. The mechanism of water pulsation is made in the form of a movably installed in the upper part of E with its overlapping along the entire length of the piston. The loading device (П) 13 and П for unloading the light fraction is connected to the lower part E. At the same time, П for unloading the light fraction is made in the form of discharge slots 7 located on the side surface E or its lower end cover. With the bottom E is matched with P for unloading the heavy fraction, made in the form of outlet cone nozzles or adjustable slots 10. Longitudinal rifles are installed above the bottom of Е, while Е is installed horizontally or inclined. For dewatering separation products, there are elevator devices that are connected through slots 7, 10 or nozzles through sealed compartments 11. The original product enters E through P 13 foe. w fe XI hO about XI CA ФРФиг .1

Description

and enters the annular channel formed by the cylinders 1, cones, or spherical surfaces. The separation of mineral grains into layers of different density occurs in the lower part of the annular channel. As it moves, the piston causes continuous fluid pulsations in the annular channel. Due to the installation of flute, pulsations arise in both the longitudinal and transverse directions. As the mixture advances along the annular channel, the particles are redistributed in size and density. The lightest particles are concentrated in the upper layers. The light fractions are unloaded through slots 7 and other slots, and heavy ones through nozzles or slots 10.5 sludge.

The invention relates to a mineral processing technique, in particular, to devices for gravitational separation of mineral particles by density and size in a liquid medium, and can be used to enrich and classify both large and fine granular materials in the mining or other industries.

A device for gravitational separation of mineral particles in an aqueous medium is known, based on the difference in the speeds of movement of the mineral grains in a thin stream of water flowing along an inclined plane (deck), making asymmetric reciprocating movement. nor in the horizontal plane in the direction perpendicular to the direction of water flow, and as the suspension of grains propels along the deck of the concentration table, loosening, stratification and selective transportation of mineral grains in accordance with their density, size and shape occur.

The drawbacks of the device are low specific productivity, high specific consumption of water, as well as the need for preliminary narrow classification of the separated mineral particles.

The closest in technical essence and the achieved result to the invention is a device (jigging machine), including a body (bath, capacity), air chambers, pulsators drive, pulsators, sieve, artificial (or natural) bed, float sensor, rotary unloader G and unloader drive.

A disadvantage of the known device is the presence of a hard connection between the amount of water supplied to the machine and the results of separation, as well as the dependence of the oscillation characteristic of the jigging bed (jigging cycle) having access to the free surface of the liquid both from oscillations of the setting mechanism (forced) and

from the characteristic of the natural oscillations of the system (bed - liquid phase), reducing the efficiency and accuracy of the separation process.

The purpose of the invention is to increase the efficiency of the separation process.

This goal is achieved by the fact that the device for gravitational separation of mineral particles is provided with longitudinal fluting mounted above the bottom of the container, the container being installed horizontally or obliquely and made annular in cross section, the water pulsation mechanism being made in the form of a movably installed in the upper part containers with its overlap along the entire length

the piston, and the loading device and the device for unloading the light fraction are connected to the bottom of the tank.

Fig, 1 shows a device with a tank in the form of coaxial cylinders; in fig. 2

- also; with capacity in the form of coaxial cones; in fig. 3-5 - options of capacities.

A device for gravitational separation of mineral particles includes a container (bath) in the form of coaxial cylinders 1

or coaxial cones 2, or coaxial spherical surfaces 3, including cylindrical (upper) and parabolic (lower) parts of surfaces. Coaxial cylinders 1 (coaxial cone 2 or coaxial

spherical surfaces 3) form a closed annular working channel (gap) 5, in the upper part of which a movable piston 4 is installed, completely blocking the annular working channel 5 along its entire length. On the internal curvilinear surface (in its lower part) of the cylinder 1 of the cone 2 or the surface 3) longitudinal rifles 6 are installed. To release light fractions

there are outlet slots 7 or 8 located on the side surface of the container or on its lower end cover, respectively. For unloading heavy fractions in the lower part of the tank, there are outlet cone nozzles 9 or adjustable slots 10. For dewatering separation products there are elevator devices 12, which are connected to discharge devices through sealed compartments 11. The loading of the initial product is carried out through the loading device 13.

The device works as follows.

The initial product in a dry, wet form or in the form of a suspension flows from the discharge device 13 to the lower end part of a completely closed annular working channel 5 filled with water. The separation of mineral grains into layers of different density and size occurs in the lower part of the curvilinear channel 5 its length due to continuous pulsations of the fluid, due to the movable piston 4. The loosening of the grains occurs both along the annular channel 5 due to oscillations of the fluid, and in the radial direction behind even the vortex pulsations arising due to the installation of longitudinal flutes 6. As the mineral mixture (pulp) moves along with continuous pulsations along the annular channel 5, particles are redistributed over the layers — an increase in the concentration of heavy fractions in the lower central layers, and side upper. Unloading of light fractions takes place in height-adjustable exhaust gases I Suit. f

g

FIG. -I

The slots 7 or 8 located on the side surfaces or on the lower end cover, the unloading of heavy ones through the conical nozzles 9 (for fine-grained material) or in the lower end part of the annular channel 5 through the adjustable slot 10 (for coarse material). The dehydration of the separation products is carried out by elevator devices 12, which are connected to a tank 1 (2 or 3) by means of hermetic compartments 11.

The use of the proposed device for the gravitational separation of mineral particles will allow 3-5 times lower specific consumption of water and 1.4-1.5 times higher efficiency of the separation process.

Claims (1)

Apparatus of the Invention A device for gravitational separation of mineral particles, including a water-filled tank, a water pulsation mechanism, a boot device and a light fraction discharger, conjugated with a bottom of the container, a heavy fraction unloading device, characterized in that the separation process, it is equipped with profile corrugations installed above the bottom of the container, the container being installed horizontally or obliquely and made annular in cross section The water pulsation mechanism is made in the form of a movably installed in the upper part of the tank with its overlapping along the entire length of the piston, and the loading device and the device for unloading the light fraction are connected to the lower part of the vessel. 9 T fr l QF-FR. FIG. 3 72 FIG 4 & / gz