RU11792U1 - INTENSIVE CYANING DEVICE - Google Patents

Abstract

1. The apparatus for intensive cyanide containing a vertical housing, a pneumatic supply pipe, an air manifold, a mixing device, characterized in that it is made in the form of a once-through chamber, provided in the lower part with tuyeres with ejector nozzles on both sides, in the upper part the chamber is equipped with inclined cyclones and a sphere having a radius equal to twice the width of the chamber, resting on the side surfaces of cyclones having a diameter equal to the width of the chamber, located outside on both sides of the chamber at an angle of 15 lower than ontas having holes on the lateral surface from the chamber side located along a helix with a step equal to half the diameter of the cyclone at a distance of half its length, the cyclones being equipped with pulp return collectors and drop eliminators and connected to vertical cyclones located on the side of the outlet openings of inclined cyclones, also having droplet eliminators and pulp return collectors. 2. The apparatus for intensive cyanide according to claim 1, characterized in that the pulp return manifolds are installed in the lower part of the cyclones and are equipped with one or more nozzles connecting the cyclones to the lower part of the chamber in the region of the suction nozzle of the tuyere ejector.

Description

DEVICE FOR INTENSIVE CYANING

The invention relates to the field of non-ferrous metallurgy, namely: apparatuses that allow for the active mixing of solutions, pulps and other complex mixtures using air, air enriched with oxygen or other gaseous mixtures.

Known patchoux, representing a cylindrical vat with conical bottoms. A vertical pipe is installed along the vertical axis of the vat, to the lower part of which a pipe is connected, along which compressed air is supplied. In some cases, several vertical pipes are installed in the vat, through which compressed air is supplied from the lower end (see Fundamentals of Metallurgy, Vol. VII, pp. 576-578 edited by A. Strigin, Metallurgizdat, 1975).

The disadvantages of the known design of the vat (patchouk) should include:

- there is no device to prevent the ejection of pulp from the airlift pipe and the tub, which limits the air supply and the productivity of the patch;

- there is no device that provides increased air flow, which limits the performance of the patch;

- there is no device that provides a uniform supply of air throughout the volume of pulp located in the patch, which also does not provide an increase in productivity of patch;

- there is a large stagnant zone in the lower region of the patchoux, in a cone in which there is no active mixing and the action of the airlift, which does not create an intensification of the process.

IPC C22B3 / 02; 11/12

The closest in technical essence to the proposed device is an agitator for hydrometallurgical processes (AS No. 800221, SZZ v, 3/02).

It consists of a vertical tank equipped with openings for loading and draining products, a steam-air manifold rigidly attached to the tank, a lower row of four nozzles and an upper row of six nozzles equipped with nozzle heads with conical narrowing holes; there are holes. A nozzle is installed at the end of the collector to eliminate deadband formation. The collector is equipped with underwater nozzles for air and steam.

The disadvantages of the known design of the agitator for hydrometallurgical processes include:

- the absence of a device preventing the ejection of pulp from the tank, which limits the performance of the agitator;

- the absence of a device that provides increased air flow per unit volume of pulp or solution in the tank to increase productivity;

- the design of the agitator does not allow introducing an increased flow rate of air and steam in excess of the critical one, which provides for the bubbling process of ascent of air bubbles;

- the absence of a device providing a uniform supply of air and steam throughout the volume of pulp or solution in the tank;

-lack of a device that provides crushing of air in the tank and obtaining a highly developed surface of the air to activate oxidative processes between the solid part, gaseous and liquid;

- with the development of reactive centrifugal movement of the pulp in the tank, there is a separation into light and heavy fractions. In this case, the heavy fraction discarded to the tank wall is practically no longer provided with atmospheric oxygen and the process slows down

oxidation of the heavy fraction (gold, silver, etc.), which allows to intensify the process.

The objective of the proposed technical solution is to increase the productivity of the device.

To solve the problem in the apparatus, the contents include a vertical casing, a pneumatic supply pipe, an air manifold, a mixing device, and a vertical casing made in the form of a direct-flow chamber. In the lower part of the chamber is equipped with tuyeres with ejector nozzles on both its sides. In the upper part, the chamber is equipped with inclined cyclones and a sphere having a radius equal to twice the width of the chamber. The sphere rests on the side surfaces of cyclones having a diameter equal to the width of the chamber, which are located outside on both sides of the chamber at an angle of 15 ° below the horizon. Inclined cyclones on the side surface, from the side of the chamber, have holes located along a helical line, with a step equal to half the diameter of the cyclone, at a distance of half its length. The cyclones are equipped with droplet eliminators and pulp return collectors. Inclined cyclones are connected to vertical cyclones located on the side of the outlet openings of inclined cyclones, also equipped with drop catchers and pulp return collectors. The pulp return collectors are installed in the lower part of the cyclones and have one or more nozzles connecting the cyclones and the lower part of the chamber in the area of the suction nozzle of the tuyere ejector.

Thanks to the installation of a direct-flow chamber, in which a vortex flow is created, the air or gas mixture is supplied ten times more than during the bubble process and a high level of mass transfer of the air-emulsion mixture consisting of air, solution and concentrate. This allows you to intensify the process at a higher level.

Due to the installation of tuyeres in the lower part, on both sides of the lateral surfaces of the direct-flow chamber, air is supplied uniformly throughout the entire volume of the direct-flow chamber, which allows to supply an increased amount of air, to use the entire volume of pulp and thereby intensify the process.

Thanks to the installation of ejector nozzles on the tuyeres, fine crushing of air in the pulp is ensured, the pulp is sucked into the ejector nozzles and an air-emulsion mixture with finely divided air bubbles is formed, which increases mass transfer. This increases the activity of atmospheric oxygen and provides an increase in the rate of oxidative processes and, in the final result, intensifies the process.

Due to the installation of the sphere in the upper part of the chamber and its curvature, the vortex flow bifurcates and rushes through the lateral openings into inclined cyclones. This allows you to reduce the flow rate and evenly distribute it on inclined cyclones.

Due to the openings on the side surfaces of the cyclones of the chamber, located at half the length of the cyclone, along a helix with a step equal to half the diameter of the cyclone, a centrifugal flow develops inside the cyclone, allowing you to separate the pulps from the air.

Thanks to the installation of inclined cyclones at an angle of 15 ° below the horizon, the pulp moves to the pulp return collector and then to the chamber, into the suction nozzle of the tuyere ejector, and as a result the pulp moves in a closed volume with a high level of mass transfer.

Thanks to the installation of droplet eliminators in the cyclone, a fine suspension of pulp is separated from the vozzz.

Thanks to the installation of vertical cyclones, a secondary, finer separation of the pulp from the air is ensured.

Thanks to the installation of the pulp return collector between the inclined cyclone and the lower part of the chamber, in the area of the suction nozzle of the tuyere ejector, the pulp is circulated between the direct-flow chamber, sphere, cyclones and the pulp return collector. This provides a high intensity process.

In FIG. 1 shows a longitudinal view of the described apparatus, in FIG. 2 is a section along AA in FIG. 1.

The apparatus for intensive cyanide includes a vertical casing in the form of a direct-flow chamber 1, tuyeres with ejector nozzles 2, sphere 3, inclined cyclones 4, pulp return collectors 5, droplet eliminators 6, vertical cyclones 7, secondary droplet eliminators 8 and pulp return collectors 9, input openings of inclined cyclones 10, outlet openings of inclined cyclones 11, suction nozzles 12 of ejector nozzles, air collector 13, openings 14 and 15 for sampling and loading - unloading of pulp.

The direct-flow chamber width is indicated, the radius of the sphere,

equal to twice the width of the chamber is designated R 2 d; the diameter of the inclined cyclone equal to the width of the chamber is indicated by d.

The apparatus for intensive cyanide works as follows:

Before the start of the process, one-quarter direct-flow chamber 1 is filled with pulp through the openings 14 and 15 in the side walls. Then air is supplied through an air collector 13 to tuyeres equipped with ejector nozzles 2.

Initially, at a low air flow rate, a bubbling process takes place, then to intensify the process, the air flow rate is increased and the bubbling process in the direct-flow chamber 1 passes into a vortex, which ensures the highest level of mass transfer.

Moreover, on the tuyeres with ejector nozzles 2, an air-emulsion mixture with finely divided air bubbles is formed.

When swirling, the entire volume of the direct-flow chamber 1 will be filled with an air-emulsion mixture. Upon reaching the vortex process, the entire pulp-air-emulsion mass, passing through the direct-flow chamber 1, will rush to the sphere 3 and, due to its curvature, the forward-flow bifurcates and rushes into the inclined cyclones 4 located in the upper part on both sides of the chamber 1, through openings 10, located on the lateral surfaces of the cyclones 4. Moreover, in inclined cyclones 4, due to the introduction of mass through the holes 10 located on the lateral surface of the cyclone 4 along a helix with a step equal to half the diameter of the cyclone 4 and the high speed of the vortex flow (1 50 m / s) in cyclone 4 a centrifugal flow is formed, during which primary separation of air from the liquid and solid composition of the mixture will occur.

The pulp, after the initial air purification, through the pulp return collector 5 will enter the lower part of the direct-flow chamber 1, to the suction pipe 12 of the lance 2 ejector nozzle, from where it will again be picked up by fresh incoming air through the lance with ejector nozzles 2 and enter the direct-flow chamber 1 to the vortex flow and will continue the next round of motion in the vortex flow in the direct-flow chamber 1, cyclone motion in inclined cyclones 4 and pulp return collectors 5. This path will be pulp until the end of the process.

The air, after separation from the pulp in the inclined cyclones 4, having passed the droplet eliminators 6, will be cleaned of a thin suspension of liquid and solid, will enter the vertical cyclones 7 located on the side of the outlet openings 11 of the inclined cyclones 4, where air will be purified from liquid and solid due to the secondary centrifugal movement in a vertical cyclone 7 and a secondary droplet eliminator 8.

Air passing through a two-stage cyclone and droplet elimination system will be released into the atmosphere without pollution, and the pulp will make the next turns of movement in a vortex flow between tuyeres with ejector nozzles 2, direct-flow chamber 1, inclined cyclone 4 and pulp return collectors 5.

During the process, it is possible to select part of the pulp or solution for analysis through openings 14 and 15, which are located in the bottom region from the side of the side walls of the direct-flow chamber 1.

Holes 14 and 15 can be used when unloading and loading the machine with pulp during periodic and continuous operation.

Head patent information

bureau E.P. Birch

Authors: V.N. Mashurian

V.V. Tsarev

Claims (2)

1. The apparatus for intensive cyanide containing a vertical housing, a pneumatic supply pipe, an air manifold, a mixing device, characterized in that it is made in the form of a once-through chamber, provided in the lower part with tuyeres with ejector nozzles on both sides, in the upper part the chamber is equipped with inclined cyclones and a sphere having a radius equal to twice the width of the chamber, resting on the side surfaces of cyclones having a diameter equal to the width of the chamber, located outside on both sides of the chamber at an angle of 15 ^o below the mountains isonta having holes on the side surface from the chamber side located along a helix with a step equal to half the diameter of the cyclone at a distance of half its length, the cyclones being equipped with pulp return collectors and drop eliminators and connected to vertical cyclones located on the side of the outlet openings of inclined cyclones, also having droplet eliminators and pulp return collectors. 2. The apparatus for intensive cyanide according to claim 1, characterized in that the pulp return collectors are installed in the lower part of the cyclones and are equipped with one or more nozzles connecting the cyclones to the lower part of the chamber in the region of the suction nozzle of the tuyere ejector.