DE1059371B - Method and device for processing solid bodies by means of a flow of liquid guided in a substantially horizontally lying closed line - Google Patents

Description

GERMAN

The invention relates to a method and devices for processing solid bodies by means of a closed body lying horizontally or approximately horizontally Line guided liquid flow, in particular for separating solid bodies after the Density (sorting) and / or according to the grain size (classifying). When sorting, the "light" Parts are separated from the "heavy" ones, whereas when classifying, the "coarse" bodies are separated from the "fine" ones.

For the separation of solid bodies one already names Devices, so-called stream washers, in which the material to be separated is preferably moved from above into an ascending one A column of liquid is poured that is vertical or only slightly inclined from the vertical is.

There are also known washing machines with open gutters, which are arranged essentially horizontally and in which the differences in the rate of descent the individual components of the material to be separated are used for separating. The known devices only work satisfactorily if the goods to be separated have a narrowly defined Körmm-gsberekh and clearly differentiated fractions and a favorable washability curve own. If, as is often the case in practice, these prerequisites are not met, then all of these devices work with a significant inaccuracy factor.

The invention has the task of creating a method and devices in which the disadvantages of the known devices are avoided, and with the simplest means a practical one Separation accuracy that meets requirements is also guaranteed for goods that are difficult to separate.

The invention solves the problem by means of a lying in a horizontal or approximately horizontal, closed line guided liquid flow, in which the material to be separated in the middle part of the Channel is abandoned and in that the good through a movable bottom of the channel a mechanically generated countermovement is issued, through which a standing vortex movement of the Good forms, from which the lighter good parts are discharged in Stromriohtuug and the heavy material part is discharged against the current through the movable cable base.

The method according to the invention operates on a principle different from that of the known stream washers with ascending liquid flow and also the flow washes with open horizontal Flume is fundamentally different. It is based on the formation of standing vortex movements of the goods, the heavy goods from the eddies or dunes through the agitated bottom of the canal upstream

Method and device

for processing solid bodies

by means of one in one essentially

horizontally lying closed

Line guided liquid flow

Applicant:

Charbonnages de France,

Paris, and Etablissements Neyrpic,

Grenoble, Isere (France)

Representative: EXr. W. Müller-Bore, patent attorney,
Braunschweig, Am Bürgerpark 8

Claimed priority:

France 25 November 1955, 11 January, 2 March
and November 15, 1956

and the light material is guided downstream by the flow of liquid. Ensure the dunes at the same time a clean washing of the goods and guarantee a very precise separation even with goods to be separated with an extensive grain size range or unfavorable washability curves.

The method according to the invention also has the advantage of a small space requirement of the used Devices, low pressure head and the elimination of practically any pressure loss. Furthermore the procedure is highly self-regulating. The method according to the invention is suitable both for sorting as well as for classifying as well as for simultaneous sorting and classifying. To the The method is preferably used for sorting goods to be separated with a diameter of the subcubs greater than or equal to more used as 1.5 mm, for classifying particles under 0.5 mm and for simultaneous classifying and Sorting for particles with diameters between 0.5 and 1.5 mm. These numbers are for guidance only given. In practice, the limits can largely vary depending on the particular operating conditions change.

In most cases, the procedure is carried out using a liquid, usually water

909 557/91

3 4

will. But it would be quite conceivable that instead of one it can run horizontally or slightly inclined,

Liquid in individual cases also a gaseous one and its inclination can be variable, preferably

Use separating medium. point towards the end of the current

Some embodiments of devices to weaken: This favors the support of the

Carrying out the method according to the invention 5 conveyor belt on the floor of the Trento line.

are shown in the drawings and after- The device described works as follows: How

standing in detail on the basis of the drawings was said above, the water tank 3

wrote. constantly fed with water in a constant amount,

1 is a longitudinal section through a type of the invention that the water velocity in the line 1 proper device with a closed separation io is higher than the speed required for the entrainment, the bottom of which, formed by a conveyor belt, would take the light parts into a stream of liquid; is necessary, but slower than the speed,

Fig. 2 and 2a are cross-sections along the line H-II which is required to take along the heavy parts.

of Fig. 1 in two different embodiments The choice of speed depends on the

this device; 15 wanted separation.

Fig. 3 is a longitudinal section through an embodiment The conveyor belt 2 is given such a movement

form in which the bottom of the separating line is so that its upper run slowly becomes uniform

is moved; moves against the flow of water.

Fig. 4 shows a variant of the construction according to. With the aid of the feeder 6, the material to be separated is guided

3, in which precautions have been taken, changes continuously enter the funnel 5. In the direction of flow

to compensate for any changes in the water throughput, which when a standing vortex is formed behind the funnel 5

Separation of some products can occur; movement of the material to be separated, a kind of dune, which on the

Fig. S shows a further variant in which the conveyor belt moves constantly. In this dune poses

the material to be separated is carried out in a different way; through the interaction of the two

Fig. 6 shows a development of the device 25 set movements of the water flow and the

of Fig. 1 showing a uniform stirring movement with both a conveyor belt and a conveyor belt

Bottom of the separating line as well as with a back and forth in the direction of the arrows F ₁ . Step out of her at the top

movable soil can be used; the parts suffered by the current of the water

Fig. 7 is a diagram of the washing circuit for after the rear end 4 of the separating line.

Grains of coal, the device according to the invention taking 30 and collected at B , while the

tang is used. Water drains off. The heavy parts, on the other hand, will be

In the embodiment according to FIGS. 1 and 2, the movement of the conveyor belt against the

the separation line from a three-sided closed water flow (arrow F ₁ ) to the front end

Sheath 1 and a conveyor belt 2 taken along as the lower end of the separating line. You overcome that

Enough. The clear height of the line is limited to all of its small stowage, which is

Length essentially constant up to the two didit plates 10, and collect at C with

Feed points or inflows for the water and for a small amount of water that the sealing plate

the material to be separated, as will be explained below. 10 can leak.

In the embodiment according to FIG. 3, the water tank 3, in turn, feeds the separating line 40 to the bottom of the separating line and is driven backwards. (Arrow F ₁ ) and causes a flow in this. The device here consists of a three-sided rear end 4. Approximately in the middle closed jacket 1, in which at 3 the water under the separating line is a funnel or filling hull 5 pressure flows, and a feed funnel or is provided to which the separating material by a conveyor belt 6 Fülkumpf 5 for the separating material. As in the case of the construction described above or any other feeder system (arrow F ₃ ) 45, the jacket 1 is fed in longitudinally. aisles divided. The coat 1 is with the ground

The jacket 1 is with the upper run of 11 of the separating line through (not shown) Conveyor belt 2 by means of lateral cheeks 7 made of chewing elastic cheeks, for example made of rubber chuk in connection. The jacket is conveniently connected. The floor designed as a rigid wall divided by partitions 8 into individual aisles, the 50 11 is connected to a mechanism 12, the obtain suitable reciprocating motion over all or part of the length of the movement can extend; their job is to share.

to prevent the formation of flow vortices. As has been shown by experiments, the

These partitions do not need to "· for conveying a phase of this movement, namely in that which the

Volume 2 to reach down. 55 counteracts the flow of liquid, d. H. those on the

The conveyor belt 2, the heavy parts resting on a drive roller 9 bottom 11 by friction

and a guide roller 9 'runs, can be taken along evenly to the left, where they are collected,

ger speed are driven (arrow F ₃ ). In the other phase of movement, i.e. when reversing,

Its upper run rests on a flat surface 2 ', the heavy parts remain because of their inertia

the contact between the upper run of the conveyor 60 in their position and thereby move relative to the

bandes and the cheeks 7 secures. At the one in Strö-Boden, which you will find a corresponding piece on the entrance

mung direction front wall of the water tank 3 promotes upstream until it finally at the front

is a resilient sealing plate 10, which is also the end of the sorting channel (where the water flow

rests on the conveyor belt 2. occurs) fall into a drain 13. The light particles

In the variant according to FIG. 2a, the support 65 is formed on the right at the downstream end of the

surface 2 'with the side walls of the shell 1 collected a soil.

closed box profile for the separating line; The bottom 11 of the sorting channel can have a number

upper run of the conveyor belt 2 runs inside the projections or stool 11 ', which just carry

Line along the bottom. The bottom favor the operation described: these protrusions

The separating line does not necessarily have to be flat. 70 11 'also contribute to the light parts that

5 6

otherwise trapped between the heavy parts fuselage F _{4 of} the separating line introduced. The transversal could, for rewash, in the water flow sections L, M, N are brought back exactly according to the ratio. of the heavy parts to the whole item to be separated and after "... _{,, r} . , _M - the ratio of the amount of water at M to the overall mode of operation of the device according to FIG. 3 _g ^^ _% ^ - ^ _{mn in every} special case one

While the bottom 11 of the separating line is to be used to achieve adequate separation,
_{The water entering at F 2} with the material to be separated (arrow F ₁ ) is fed to water in a constant amount through the inflow 3. Furthermore, it can be dirty or muddy as desired and if you pass through the hopper 5 in a steady stream, the material to be separated is normally given up when the light items are removed. Below this feed funnel, parts at 4 are returned to the feeder 5 in the circuit and shifted a little in the direction of flow. On the other hand, it is essential that the structure forms a dune that is circulated in the direction of arrows F ₄ , which enters the feed container G _{at F 1.} On the one hand, light wandering out of it is as pure as possible, since this washes the upstream parts with the water in the direction of flow to the migratory heavy parts and from the lower end 4 of the separating line, which they leave there with the remaining light particles and the sludge water, while the heavy parts are supposed to get rid of.

the line base 11 migrate to the outlet 13, from I, the device _n in FIG. 6 is similar to where they can be removed by an arrow F. continuously or batchwise in the direction of _w i _e in Fig. 1 the bottom of the separation line again. Conveyor belt formed. . The Ausin the similar arrangement shown here nadh 4 20 recognizes guide die has the following features: The operating as in Figure 3 to 1, the separating line at F ₂ to the downstream part of the separation conduit is a feeder for the material to be separated to the feed hopper 5, markedly longer. and has at 14 a cross section connection F ₁ the water inflow to the line 1, at 4 the enlargement, which causes a reduction in the flow exit of the light, at F ₈ the speed of the heavy parts. As a result, the diine is formed at D and F _4. 25 _e i _ne second dune, which effects the washing of the stream in the arrangement according to FIG. 4, devices are provided light parts carried downwards, with which disturbances are avoided (arrows F ₆ ). From this second dune, therefore, the changes in the water runoff at F ₅ upwards become the lighter parts that we could have come from before to the rear. These devices consist of exit 4 discharged, but migrate in the same way in that the withdrawn water is systematically returned to the heavy parts below on the conveyor belt to the first device. In the illustrated dune that has formed at A , and unite example, the outlet F ₅ for the heavy parts is connected to it with the other heavy parts that are conveyed by a vertical riser pipe P. Air, which is blown in the direction of the arrows F ₃ against the water at the foot of the riser pipe P , ensures the flow is taken along. In the case of difficult ascending of the heavy parts and the withdrawn items to be sorted, several such water can be used. Provide places in the sorting channel at which the cross-section of the mixture of water and heavy parts is enlarged, and so several rewashes fall on an inclined grid E, which is perpendicular to the dunes. Likewise, in the part of the sorting channel located upstream of an additional inlet to the feed container G downwardly, there are locations which can be seen to the process water through the inflow F ₁ , at which the cross-section of the sorting channel is guided. In this way, the locally reduced areas collect, so that the heavy parts after washing accumulate here on the grid E, while the dune for the heavy parts is formed. As the water runs completely into the container G , a separation effect can be achieved for the individual dunes, which depends on the structure of FIG 4 similar; one recognizes at 1 the ver-separating line achieved by the preceding dune, at G the food container, which is the divorced. The parts of intermediate density or water for this line supplies, at P the riser grain size are partly again in the circuit with air injection, through which the heavy parts are fed, which promotes the accuracy of the separation in the grid E , and the excess 50 is favored .

Water is returned to the container G. At 5 in FIG. 6 there is also another possibility for the material to be separated into the separating line, the feeding of the device is indicated. In contrast to the construction described above, it consists in that _{the part located upstream from the water tank 3 is immersed by a hydraulic feeder F 2} and brought up to the conveyor belt, so that in the inflow 5 at the same time 55 from the end of the mouth of this box 3 is fed in by means of separating material and water. These two guide rollers 15 and 15 'such an inclination order is particularly advantageous because the material to be separated means that its upper run 2 appears to be mixed with water at the same time. Heavy parts lifted above the water level. The by the feeder F ₂ the influx 5 züge- For this purpose, the roll 15 'with soft Verführte water combines with the equipped from the loading ⁵ ° clothing and Längskannelierungen, the holder G coming water and simultaneously transmits the passage of the Conveyor belt carried along with this for separating the goods. Allow solid bodies to flow.

from the container G is therefore selected so that it is in Fig. 7 is an application example of the invention

forms a suitable addition, the upstream device in a washing plant for raw materials

is introduced and the total water throughput 65 carbon represented by the feeder 6 in the

a constant best value for inlet 5 is introduced through the separating line. Downstream of inlet 5

gives the desired separation effect. a dune formation occurs in the manner described above

As can be seen from FIG. 5, the water dung becomes a. At the downstream end 4 of the

The washed coal emerges from the filling hull 5 and from the container G separating line

at R , a vibrating sieve 16 falls parallel into the downstream dune 70; of these, 18

Claims (11)

eluted moist pure coal. The conveyed water and the sludge collect in a basin 20. At the bottom of the sedimentation tank 13 a, the mountains collect, which are discharged through a pipe 21 in the direction of arrow F7; for this purpose fresh additional water is added at 22. This stream of water and mountains is given to a vibrating sieve 17, from where at 19 the desludged mountains are discharged. Water and sludge collect in a special basin or in the same basin 20 as the water and the sludge admixtures from the cycle of the washed KoMe. By means of a pump 26 with controllable constant delivery and the line 25, the water is fed back from the collecting basin 20 in the direction of the arrow -F8 into the water tank 3 of the treatment device. The supply of the entire washing circuit with water is regulated by a float-controlled tap 23, which has the task of admitting additional water 24 into the line 25 so that the water level in the basin 20 remains constant. A part of the sludge admixtures in the water which passes through the basin 20 is drawn off in the deepest point of this basin. A numerical example is given below in order to illustrate the results which can be achieved with the method and the device according to the invention. This example concerns sorting raw coal into washed coal and mountains. In the device used for the experiment, the separating line has a square cross-section with a side length of 150 mm and a conveyor belt as the bottom. Two tons of raw coal with grain diameters of 0.5 to 6 mm are processed every hour. In the table below, the first column contains the density levels, while the second, third and fourth columns show the percentages of the individual density levels in the raw coal, the washed coal and the mountains. 45 Raw Coal Washed Mountains Dense Coal 0 <1,331,931,90,31.3 to 1Λ42,141,80,31.4 to 1,54,03,70,41.5 to 1,61,91,50,61.6 to 1,81,30,71,11 , 8 to 2.01, 40, 31, 32.0 to 2.21, 40, 14, 52.2 to 2.44, 70, 211.1> 2.411, 30, 2 The proportion of ash in the raw coal was 21.8% 7.3% on the washed coal and 73.2% on the mountains. - Patent claims: 1. Processing method by means of a closed in a horizontally or approximately horizontally Line guided liquid flow, characterized in that the separating material in Middle part of the channel is abandoned and that the good by a movable bottom of the Channel a mechanically generated counter-movement is issued, through which a standing vortex movement of the goods, from which the lighter portions of the goods are discharged in the direction of flow and the heavy cargo is carried away against the current through the movable cable floor. 2. The method according to claim 1, characterized in that that the mechanical movement is carried out continuously or with shaking. 3. The method according to claim. 1, characterized in that that the flow of liquid accelerates locally upstream of the point of application for the material will. 4. The method according to claim 1, characterized in that the liquid flow downstream is locally slowed down from the point of application for the goods. 5. The method according to claim 3 or 4, characterized in that the speed of the Liquid flow downstream or downstream of the task point each au several Places is slowed down or accelerated. 6. Device for performing the method according to one of claims 1 to 5, characterized by at least one partition (8) in the longitudinal direction of the separating line (1), which this in divides parallel courses (Fig. 2 and 2 a). 7. Device for performing the method according to one of claims 1 to 5, characterized by a riser pipe with air injection (P) which is connected to an upstream part of the separating line and feeds a Duirchgangsweg (G) for reintroducing the separating liquid into the separating line (Figures 4 and 5). 8. Device for performing the method according to one of claims 1 to 5, characterized by an additional Flüissigkeitszufiuß (L) at the point of application for the material to be separated, this liquid and the material to be separated from a common feeder (F ₂ ) and in a downstream cross section (JV) of the line which is larger than the cross-section (M) of the separating line (Fig. 5) lying upstream of this feeding point. 9. Device for performing the method according to one of claims 1 to 5, characterized characterized in that a conveyor belt (2) is provided at the bottom of the separating line, which is opposite moved by the flow in the separating line. 10. Device for carrying out the method according to one of claims 1 to 5, characterized in that the bottom of the separating line is formed by a wall (11) which is driven reciprocally and preferably with Humps (H ') is occupied. 11. Device for performing the method according to one of claims 1 to 5, characterized characterized in that the bottom of the separation duct in the downstream part has a slight has decreasing slope. Considered publications:
German patent specifications No. 864 531, 826 883,
332, 724 718 .. 724 207, 659 077, 534 796. - For this purpose 2 sheets of drawings 1 909 557/91 6.59