RU2365419C2 - Line for concentration of oxidised nickel-bearing ore - Google Patents

Abstract

FIELD: mining engineering.

SUBSTANCE: invention relates to gravitational concentration field, particularly to equipment for processing of mineral raw materials, and can be used for concentration of oxidised nickel-bearing ore. Line for concentration of oxidised nickel-bearing ore includes unit for concentration, consisting of installed by process device for grinding and repulping in the form of dibhole with hydraulic monitor, device for additional grinding and washing in the form of disintegrator with elastic lamellar diaphragm for formation of cavitational effect, at least of one hydraulic cyclone for separation of sinking fraction by density, connected to deviece for separation in the form of conical separator, at least two devices for cleaning of sinking fraction, located after the device for separation, device for cleaning of floating fractions, connected to disintegrator, hydraulic cyclone and conical separator, and lapping unit of concentrators, consisting of at least two devices for drying and two devices for separation. Line additionally includes device for thickening, located between hydraulic cyclone and conical separator. In the capacity of devices for separation of lapping unit there are used electrostatic and/or magnetic separators.

EFFECT: effectiveness increase of processing of oxidised nickel-bearing ore and receiving of desired product with higher content of nickel.

3 cl, 1 dwg

Description

The invention relates to the field of gravity concentration, in particular to equipment for processing mineral raw materials, and can be used to enrich oxidized nickel-containing ores.

A known line for ore dressing, including a concentrator, hydroclassifier, shelf classifier and concentration tables connected by pulp lines (see RU 2171145 C1, B03B 7/00, 07/27/2001), which can be used for the enrichment of nickel-containing materials.

However, its use does not allow to fully extract the concentrate from nickel-containing materials.

A known method of enrichment of oxidized nickel-containing ores, carried out using a line including a device for pulping, a device for grinding in the process of washing the pulp ore, a heavy medium separator for separating granular (heavy) fraction containing no fine particles by density (gravity device), forming a raw material beneficiation module (see RU 2200632 C2, 03.20.2003, B03B 7/00), which is the closest analogue to the proposed invention.

The disadvantage of this line is the low processing efficiency of oxidized nickel-containing ores.

The basis of the present invention is the task of creating such a line for the enrichment of oxidized nickel-containing ores, the use of which would improve the processing efficiency of mineral raw materials and thereby obtain the target product, characterized by a high content of the desired concentrate.

The problem is solved in that the line for the enrichment of oxidized nickel-containing ores includes an enrichment module, consisting of devices for grinding and pulping in the form of a sump with a hydraulic gun installed during the technological process, devices for additional grinding and washing in the form of a disintegrator with an elastic plate membrane to form the cavitation effect of at least one hydrocyclone for separating the heavy fraction by density associated with a cone separation device a separator, at least two devices for cleaning the heavy fraction located after the device for separation, a device for cleaning the light fractions connected to the disintegrator, hydrocyclone and cone separator, and a finishing module of the concentrates consisting of at least two devices for drying and two devices for separation.

The line further includes a thickening device located between the hydrocyclone and the cone separator.

As devices for separating the finishing module, electrostatic and / or magnetic separators are used.

The inventive combination of features allows for effective enrichment of the feedstock to obtain the target product with a high content of the desired concentrate.

The presence of a thickening device allows to increase the effective separation of the pulp due to the concentration of diluted ore mass. This is explained by its partial dehydration as a result of the deposition of solid particles whose density is greater than the density of the liquid.

The presence of a device for cleaning the heavy fraction additionally allows you to increase the degree of required concentrates in the composition of the target product.

The presence of a module for finishing concentrates also allows you to increase the content of the required concentrates in the composition of the target product.

The invention is further explained in the detailed description of its implementation with reference to the drawing, which shows a line for the enrichment of oxidized nickel-containing ores.

The line for enrichment of oxidized nickel-containing ores represents a system of various metallurgical apparatuses operating in different modes and performing various functions in order to obtain concentrate from a mixture of valuable components and waste rock, and includes the following units installed during the technological process, combined into an enrichment module.

The device 1, where the grinding and pulping of the feedstock is carried out, is a sump with a hydraulic gun.

The sump, made in the form of an accumulating tank, is used to concentrate water and feedstock, and a hydraulic gun capable of creating a powerful jet of water is used to wash and destroy this feedstock in order to obtain pulp.

Further, in the course of the technological process, an additional receiving device (not shown) can be installed for pumping pulp ore, from which the pulp is transferred to the device 2 by means of a pump.

The device 2, made in the form of a disintegrator, is a technical tool for additional grinding and washing heavily contaminated with clay admixtures of mineral raw materials. The disintegrator includes a working chamber with an elastic plate membrane, which provides the formation of shock waves in the working chamber.

The device 2 is connected with a device 3 for cleaning the light fraction and with a gravity device 4 for separating the fraction by density, which is used as at least one hydrocyclone.

The device 3 for cleaning the light fraction is a filtered drum.

In the embodiment consisting of 2, 3 or 4 series-installed hydrocyclones, the pipe of the previous hydrocyclone is a feeder for the subsequent.

Gravity device 4 is connected to a device 5 for separation, which, in turn, is connected to a device 3 for cleaning the light fraction.

As a device 5 for separation, a multi-tier cone separator or a cascade system of single cone separators can be selected.

In an embodiment, the enrichment line may further include a thickening device 6 located in the process circuit between the gravity device 4 and the separation device 5.

The thickening device 6 is made in the form of a thickening funnel, the principle of which is based on the gravitational separation of the liquid phase from disperse systems.

In an embodiment, the enrichment line may further include at least two devices 7 for cleaning the heavy fraction, which are located in the technological chain after the device 5 for separation.

The device 7 is a concentrated tables, on which due to the creation of shaking or reciprocating movements, the heavy fraction is separated by density, as a result of which the target product with a high content of the desired concentrate is obtained.

In the embodiment, depending on the task, the number of concentration tables can be selected in the range from 2 to 50 units.

Additionally, the line for beneficiating oxidized nickel-containing ores may include at least two drying devices 8, two separation devices 9, forming a module for finishing concentrates.

The drying devices 8 are made in the form of drying drums, the principle of which is based on the heat treatment of the material in order to remove the liquid and then drying it.

As devices 9 for separation, two electrostatic separators, or two magnetic separators, or a combination thereof can be used.

The line for the enrichment of oxidized nickel-containing ores, based on gravity enrichment, operates as follows.

The feedstock in the form of oxidized nickel-containing ore is fed into the device 1, where, under the action of a powerful jet of water created by the hydrotunnel, pulping and hydrogrinding occur to obtain fractions of 50 mm in size.

The resulting pulp, for example, through an additional receiving device (not shown in the drawing) for pumping pulp ore through a pump enters the disintegration device 2.

In the disintegration device 2, pulp components are crushed to obtain fractions up to 3 mm in size and washed with clay impurities to form a light fraction containing nickel and a heavy fraction containing nickel.

The use of a disintegrator provides high efficiency washing mineral raw materials from clay impurities. This is explained by the fact that the formation of shock waves occurs inside the device, which, in turn, determine the occurrence of a cavitation effect in the pulp. The presence of a cavitation effect in the pulp, which has a high destructive effect, leads to an intense breaking of bonds between individual particles in clay aggregates.

The light fraction containing Nickel, by gravity enters the device 3 for cleaning the light fraction. The use of a filter drum provides a more thorough fraction of useful minerals from waste rock, which is sent to the dump.

The heavy fraction, including nickel, as well as waste rock is fed into the gravity device 4, where, under the influence of centrifugal forces in the aqueous medium, the pulp components are separated by density.

The use of a hydrocyclone also makes it possible to obtain a light fraction, which is subsequently sent to a device 3 for finer cleaning, a heavy fraction containing nickel, suitable for further concentration on a separation device 5.

In the case of using the hydrocyclone system as a result of the operation of the first hydrocyclone, the heavy fraction is removed to the next process stage, and the light fraction under the influence of the vortex flow enters the next stage, and the light fraction passes to the next hydrocyclone.

At the outlet of the hydrocyclone system, the heavy fractions are combined into a single stream, which is sent to a separation device 5, the use of which allows to increase the concentration efficiency due to the selective separation of pulp components by mass to obtain a light fraction and a heavy fraction.

As a result of this enrichment, an industrially applicable target product is obtained with a nickel content of 41-43% and a light fraction, which is sent to the device 3 for cleaning it.

In addition to the claimed equipment, the line for the enrichment of oxidized nickel-containing ores may additionally include equipment that is aimed at increasing the concentration efficiency in order to obtain the target product with a higher content of the required concentrate.

For more effective selective separation of the flow of heavy fractions enters the device 6 for thickening, the presence of which in the technological chain allows you to concentrate the diluted ore mass by partially dehydrating it.

In addition, the degree of concentration of the enriched target product obtained as a result of selective separation can be increased through the use of devices 7 for purification of the heavy fraction.

Claims (3)

1. A line for the enrichment of oxidized nickel-containing ores, including a beneficiation module, consisting of devices for grinding and pulping in the form of a sump with hydraulic gun installed during the technological process, devices for additional grinding and washing in the form of a disintegrator with an elastic plate membrane for the formation of a cavitation effect, at least one hydrocyclone for separating the heavy fraction by density associated with a separation device in the form of a cone separator, at least there are devices for cleaning the heavy fraction located after the separation device, a device for cleaning the light fractions connected to a disintegrator, a hydrocyclone and a cone separator, and a finishing module for concentrates, consisting of at least two drying devices and two separation devices. 2. The line according to claim 1, characterized in that it further includes a thickening device located between the hydrocyclone and the cone separator. 3. The line according to claim 1, characterized in that electrostatic and / or magnetic separators are used as devices for separating the finishing module.