Gravity separator

 

(57) Abstract:

The invention relates to the field of enrichment material, in particular the enrichment of ores and placers by wet gravity separation in the flow of the slurry flowing along the inclined working surface, and also to separate the different dry granular materials in grain density. Gravity separator contains consistently located on the vertical axis of the feeder, at least one tier separation, consisting of polyparaphenylene, working surface made in the form of an inverted cone or pyramid surface, and a discharge valve with a shut-off valve located at the bottom of the working surface and containing the outputs, respectively, of the heavy and light fractions, while on the working surface radially, along the flow of the pulp, are rifle with grooves between them, the height of the flute in the direction of the shut-off valve discharge valve made increasing with zero values, the point of which is situated mainly on the distance in two-thirds of the working surface of the cutter, and the width of the grooves between the grooves is tapered in the direction of the cutter unloading site. The invention allows PoE materials, in particular ores and placers by wet gravity separation in the flow of the slurry flowing along the inclined working surface, and also to separate the different dry granular materials in grain density.

Closest to the claimed solution to the technical essence and the achieved technical result is the gravitational separator for U.S. patent 3379310, publ. 23.04.68, NCI 209-459 containing sequentially arranged along the vertical axis of the feeder, at least one tier separation, consisting of polyparaphenylene, working surface made in the form of an inverted cone or pyramid surface, and a discharge valve with a shut-off valve located at the bottom of the working surface and containing the outputs, respectively, of the heavy and light fractions. In this separator vertically alternating layers with dual work surface and layer with a single working surface, while in the tier with dual work surface at the lower end of polyparaphenylene is twin ring divider and each working surface of this layer contains its discharge node with the appropriate cutter and outputs the structure to the cutter corresponding to the unloading site.

The main disadvantage of this gravitational separator is a low concentration of grains heavy fraction in the bottom layers of thread on the working surface, in particular before the trimming, due to the lack of difference in the velocities of the layers of light and heavy fractions at continuous flow of pulp on a cone or pyramid working surface that cannot provide the necessary laminarinase layers of the flow of pulp and increase the limits of size enrich the material in the direction of small and large grains heavy fraction.

In addition, another disadvantage of this separator is the possibility of clogging the holes before you cut the bottom of the work surface, as a man-made debris and large particles of rock that caused a continuous stream of layers of pulp through the cutter.

The basis of the invention is the creation of an effective gravitational separator by radial ribs of the working surface of the separator to increase the difference in the velocities of the layers of light and heavy fractions in the flow of the pulp, which will increase the concentration of the grains of the heavy fractions of the Loew flow of the slurry and to increase the limits of size enrich the material in the direction of small and large grains of the heavy fraction. In addition, it will help to reduce the possibility of clogging the holes before you cut off as a man-made debris and large particles of rock.

The problem is solved in that the gravitational separator contains consistently located on the vertical axis of the feeder, at least one layer separation, consisting of polyparaphenylene, working surface made in the form of an inverted cone or pyramid surface, and a discharge valve with a shut-off valve located at the bottom of the working surface and containing the outputs, respectively, of the heavy and light fractions. On the working surface radially, along the flow of the pulp, are rifle with grooves between them, the height of the flute in the direction of the cutter handling unit is designed with increasing value of zero, the point of which is situated mainly on the distance in two-thirds of the working surface of the cutter, and the width of the grooves between the grooves is tapered in the direction of the cutter unloading site. In addition, the working surface with grooves made with increasing steepness in the direction of the cutter unloading site. The shut-off valve discharge valve is installed with the possibility of working surface and the tiers with a single working surface, in the tier with dual work surface at the lower end of polyparaphenylenes is twin divider, and each working surface of this layer contains its discharge node with the appropriate cutter and outputs of the heavy and light fractions.

Performing on the working surface radially spaced riffles with tapering grooves between them in the direction of the cutter discharge node to increase the difference in the velocities of the layers of light and heavy fractions in the flow of the pulp, in particular before the trimming, which is explained by the fact that in the bottom layer of grain heavy fraction is due to the narrowing of the grooves between the grooves in the direction of the cut pile up on each other, whereupon the layer height heavy fraction increases, and the speed falls, while the speed of the upper layer of the light fraction remains almost unchanged because of movement in the upper part of the grooves between the grooves and/or over the grooves. This provides increased concentration of grains heavy fraction in the bottom layers in the grooves grooves between the work surface and maintain laminarinase layers of the flow of pulp. Speed reduction layer heavy fraction provides a more complete loss it supports the possibility of increasing the hole between the cutter and the work surface, to allow passage through the holes before the trimming of larger grains heavy fraction. This allows you to increase the size limits enrich the material. In addition, the increase in the difference in the velocities of the layers of the pulp itself corrugated working surface provides the passage of man-made debris and large particles of rocks in the upper layer above the grooves, thus reducing the possibility of clogging their holes before the trimming. And the use of flute, the height of which increases in the direction of the shut-off valve discharge valve, allows optimum value between the narrowing of the width of the grooves between the grooves and the increase in the height of the flute in the direction of the cutter unloading site.

This is due to increasing this thickness of the bottom layer with increasing pile of grains of heavy fractions in the direction of the cutter, which leads to an increase in the degree of concentration of the heavy fraction. While increasing the height of the flute facilitates the passage of man-made debris and large particles of rock over the hole before the trimming, which reduces the possibility of clogging them. The increase in the height of the flute with zero values, the point of which location is ereht from a continuous stream of layers of pulp to radially divided by the number of grooves between the grooves, that ensures the preservation of laminarinase layers of the flow of pulp.

The execution of the work surface and respectively flute with grooves between them with increasing steepness in the direction of the shut-off valve discharge valve ensures that the drawdown in the bottom part of the flow of pulp in the initial part of the working surface mostly small grains heavy fraction. A further increase of the steepness of the slope of the bottom of the working surface eliminates the possibility of clogging the grooves between the grooves. Thus, the optimal angle of inclination of the working surface on its various sites.

Install the web clipper discharge angle can be offset vertically allows you to install it at the optimal height flow in the grooves between the grooves for a more complete blocking layer heavy fraction and passes over the hole before the trimming layer light fraction, as well as man-made debris and large particles of rock.

The execution of the separator having a corrugated working surface (working surface), with alternating vertical layers with dual work surface and layer with a single working surface, and tier dual RA is loading nodes with the corresponding selectors, allows main and control operations on the tiers with dual work surface, and perejitye operations on the tiers with a single work surface. This ensures optimum number of layers for the qualitative separation of enriched materials.

The above confirms the presence of causal relations between a set of essential features of the claimed invention and achievable technical result.

This set of essential features allows comparison with the prototype to increase the concentration of the grains of the heavy fraction in the bottom layer in the narrow grooves between the radial grooves on the working surface, and also keep laminarinase layers of the partial flow of the pulp and to increase the limits of size enrich the material in the direction of small and large grains of the heavy fraction. In addition, this will reduce the possibility of clogging the holes before you cut off as a man-made debris and large particles of rock. All this is due to the increase in the difference in the velocities of the layers of light and heavy fractions in the partial flow of the pulp between the grooves.

According to Antoni", because the set of essential features that characterize the claimed gravity separator, is new and not obvious from the prior art.

The claimed invention is illustrated in the drawing, in which: Fig.1 is a diagram bunk gravity separator (half vertical section; Fig.2 is a top view of the part of the working surface of the separator with triangular grooves between the grooves, Fig.3 is a top view of the part of the working surface of the separator with trapezoidal grooves between the grooves.

A preferred variant of the gravity separator is designed as a bunk separator, which in accordance with Fig.1 contains consistently located on the vertical axis of the separator feeder 1 for feeding the pulp fine ore, the first layer 2, the second layer 3 separation. The first tier 2 consists of the first polyparaphenylenes 4, made in the form of a truncated cone, the lower end of which is a ring twin divider 5 of the flow of pulp dual work surface: the first 6 and second 7 surface, each of which is made in the form of inverted truncated conical surface with increasing steepness on CNY site consists of a first annular cutter 8, the hole in front of which is the first exit 9 heavy fractions, the first output 10 of the light fraction. The second discharge unit consists of a second annular cutter 11, the hole in front of which is a second output 12 heavy fraction, the second output 13 of the light fraction. On the first working surface 6, mainly at its two thirds of the holes before the first annular cutter 8 are radially along the flow of the pulp, rifle 14 triangular in cross-section grooves 15 between them (see Fig.2).

And, accordingly, on the second working surface 7, mainly at its two thirds of the hole before the second annular cutter 11 are radially along the flow of the pulp, rifle with 16 triangular in cross-section grooves 17 between them. The second tier 3 of the separator consists of a second polyparaphenylenes 18, made in the form of a truncated cone, the third single working surface 19, made in the form of inverted truncated conical surface with increasing steepness of the slope (the surface of the one-sheet hyperboloid of rotation), and the third discharge valve comprising a third annular cutter 20, the holes in front of which are the output 21 of the heavy fraction, and the third output texts) fractions. On the third working surface 19, mainly at its two thirds of the holes before the third annular cutter 20 are radially along the flow of the pulp, rifle 23 with triangular in cross-section grooves 24 between them.

The height of the flute 14, 16, 23 increases from zero to the maximum in front of the openings of the respective selectors 8, 11, 20, in the direction to which the width of the respective grooves 15, 17 and 24 is narrowed, the width of the constriction can be made according to the linear law, and any reasonable curve. Thus the slope of the flute 14, 16, 23 and, accordingly, the grooves 15, 17 and 24 between them is made with an increasing slope as the slope of the corresponding working surfaces 6, 7 and 19.

The selectors 8, 11 and 20 are made with offset vertically to fit on the boundary layers of light and heavy fractions in the flow of the pulp.

Working surfaces 6, 7 and 19 can be made of metal, fiberglass and covered abrazivnostoykiye material in the form of a corrugated surface.

This separator operates as follows.

Fine-grained ore in the form of slurry is loaded into the feeder 1 and from it by gravity to the surface of the first polyparaphenylene is it twin ring divider 5, which divides the flow of pulp into two equal parts, which respectively flow in the first 6 and second 7 dual work surfaces. When driving on tapering conical working surfaces in each thread pulp stratify seeds in height and density, and grain heavy fractions are in the lower bottom layer of pulp, and the light fraction in the upper layer. In the flow of the pulp is increased segregation of grains in a narrowing of the grooves 15, 17 between the grooves 14, 16, respectively, and the height of the lower layer heavy fraction increases due to the accumulation of grains at each other, and the speed at the bottom of the bottom layer of heavy fraction is further reduced, causing an even greater loss of grains heavy fraction, in particular small grains. The speed of the upper layer practically does not change.

The use of corrugated working surface allows you to enlarge the holes before the relevant cut off to ensure the passage through them of larger grains heavy fraction. The upper layer of the light fraction passes into the upper part of the flute 14, 16, or over them, bypassing holes before the relevant cut off 8, 11, and enters the appropriate outputs 10, 13.

If possible increase the number of roughing and control operations of the gravitational separator contains more than two tiers.

In another embodiment, the gravity separator in accordance with Fig. 3, between the grooves 25, 27 and 29 to the respective working surfaces 6, 7 and 19 of the respective slots 26, 28 and 30 are made of trapezoidal shape in cross section or any other acceptable form.

In other embodiments, execution of the gravitational separator working surface layers of separation can be arranged one above the other inclined chutes made with uvelichivalsya to the bottom.

For option separation of dry mixes surfaces 6, 7 and 19 have increased angle compared to the wet separation in the flow of the pulp.

Although here shown and described is considered the preferred embodiments of the present invention, specialists in the art it will be clear that it is possible to make various changes and modifications, and the elements can be replaced by an equivalent, without departing from the scope of the claims of the present invention.

Compliance with the proposed technical solution the criteria of the invention "industrial applicability" is confirmed by a specified example of a gravitational separator.

1. Gravity separator containing sequentially arranged along the vertical axis of the feeder, at least one tier separation, consisting of polyparaphenylene, working surface made in the form of an inverted cone or pyramid surface, and a discharge valve with a shut-off valve located at the bottom of the working surface and containing the outputs, respectively, of the heavy and light fractions, characterized in that the working surface radially, along the stream of pulp p is on increasing with zero values, the point of which is situated mainly on the distance in two-thirds of the working surface of the cutter, and the width of the grooves between the grooves is tapered in the direction of the cutter unloading site.

2. The separator under item 1, characterized in that the working surface with grooves made with increasing steepness in the direction of the cutter unloading site.

3. The separator under item 1 or 2, characterized in that the shut-off valve discharge valve is mounted for displacement in the vertical direction.

4. The separator according to any one of paragraphs. 1-3, characterized in that it contains alternating vertical tiers with dual work surface and tiers with a single working surface, while in the tier with dual work surface at the lower end of polyparaphenylenes is twin divider, and each working surface of this layer contains its discharge node with the appropriate cutter and outputs of the heavy and light fractions.

 

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