DEVICE FOR CLEANING AND FINE-SORTING GRAIN METALLURGICAL WASTE FINES AND METHOD FOR CLEANING AND FINE-SORTING GRAIN METALLURGICAL WASTE FINES

Abstract

A device for cleaning and fine sorting grain metallurgical waste fines and the method for cleaning and fine-sorting grain metallurgical waste fines. The material is fed to the device for cleaning of fine metallurgical waste from the feeding tank (1), by means of a feeding mechanism (2) and is transported to initial separator (3), into which air is blown with a fan (4). The most dusty fractions hovering in the initial separator (3) are directed to the collector (6). However, the largest fractions of metallurgical waste fall to the bottom part, and they are removed with a cascade pipeline (7) directed upwards to the cascade separator (8). Lighter fractions accumulated in the cascade separator (8), are directed to the collector (6), and then to the next cascade separator (15), from where lighter and finer fractions of metallurgical waste are directed to expanded cascade separator (16), and the lightest fraction of waste are then directed to the cyclone dust collector (18).

Claims

1. The device and fine sorting grain for cleaning of fine metallurgical waste tines, composed of feeding tank connected to feeding mechanism for loose material, with vertically oriented initial separator, into which air is blown by means of a fan, and with bottom part connected by means of an ascending pipeline with a cascade separator. In the middle part of the cascade separator there is a bumper with cascades located above and under the bumper, the cascades are arranged askew and in certain distance from each other, whilst in the bottom part of the cascade separator there is a regulation damper, through which the larger fractions of the cleaned material are discharged to a magnetic separator and later to an external tank or directly to an external tank, whereby the upper part of the described cascade separator is connected to a filter, into which the lighter, hovering fractions of cleaned fine metallurgical material are introduced, and the end element of the apparatus is an outlet optionally connected with a fan or a suction pump, wherein the ascending pipeline is a cascade pipeline (7), whereby individual sections (9) of the cascade pipeline (7) are of different diameter or are not arranged coaxially or are equipped with cascades or are of spiral shape.

2. The device and fine sorting grain for cleaning of fine metallurgical waste fines, according to claim 1, wherein both the upper part of the initial separator (3) and the upper part of the cascade separator (8) are connected by means of ducts to the collector (6), into which the lightest, dusty fractions, isolated in the initial separator (3) and in the cascade separator (8). Those lightest fractions are then directed to the next cascade separator (15), in its bottom part there is a regulation damper (13), by means of which the air is sucked in and the finest fractions are lifted up; by means of this dumper next, coarser fraction of isolated metallurgical waste is introduced and is preferably poured to the magnetic separator and then to the external tank (14), or possibly directly to the external tank (14).

3. The device and fine sorting grain for cleaning of fine metallurgical waste fines, according to claim 2, wherein the next cascade separator (15) is connected with the expanded cascade separator (16), which has an area of adjustable vertical cascades (17), creating a shutter, so to say, the angle of the shutter may be adjusted. The stream of cleaned fine metallurgical waste introduced to the expanded cascade separator (16) from the next cascade separator (15) goes to the shutter.

4. The device and fine sorting grain for cleaning of fine metallurgical waste fines, according to claim 3, wherein the cascade separator (16) is connected with the cyclone dust collector (18), into which a stream of fine waste is introduced from the expanded cascade separator (16), in the bottom part of the cyclone dust collector there is a regulation valve (13), through which additional air can be sucked from outside and through which larger fractions are removed to the magnetic separator and to the external tank (14), or directly to the external tank (14).

5. The device and fine sorting grain for cleaning of fine metallurgical waste fines, according to claim 1, wherein is equipped with at least one additional separator, preferably a cascade separator (8) or with additional cyclone dust collector (18).

6. The method for cleaning and fine-sorting grain metallurgical waste fines that consists in feeding loose waste material from the feeding tank by means of a feeding mechanism to the vertically oriented initial separator, preferably a cascade separator, operating on to-date known principles and simultaneously to the inside of the initial separator air Is blown with a fan, preferably through the regulation damper, thus positive pressure or overpressure, is created inside the initial separator and the particles of the material speed up, and later the loose material is blown and as a result the largest fractions fall down to the bottom of the initial separator and are then directed to the inside of the cascade separator, directly to a bumper and cascades located under and over the bumper, where the largest grain is selected, while the grain that well down is removed by means of regulation damper, preferably to the magnetic separator, or directly to the external tank and finest particles, lifted up with the air are removed through an outlet, wherein the preselected material, accumulated on the bottom of the initial separator (3) is transported with the stream of air to the cascade separator (8) through the cascade pipeline (7), where the clean and prepared material breaks up and is reduced on its walls.

7. The method for cleaning and fine-sorting grain metallurgical waste fines in accordance with claim 6, wherein the most dusty fractions isolated in the initial separator (3), as well as in the cascade separator (8), lifted up with the air are directed to the collector (6), and then to the next separator (15), where the material is dispersed and additionally breaks up, and its lightest undesirable fractions are sucked up to the top of the separator, and the largest cleaned coarsegrained fractions sliding down are removed, preferably to the magnetic separator and to the external tank (14), or directly to the external tank (14).

8. The method for cleaning and fine-sorting grain metallurgical waste fines in accordance with claim 7, wherein the most dusty fractions isolated in the next separator (15), lifted up by the air, are directed to the expanded cascade separator (16) where the stream is directed to the area of adjustable cascades (17), that create a shutter. The angle of the shutter is adjusted appropriately and the largest, isolated fractions of the material, that were transported downwards are analogically removed through the regulation valve 13, preferably to the magnetic separator or to the external tank 14.

9. The method for cleaning and fine-sorting grain metallurgical waste fines in accordance with claim 8, wherein the hovering, lightest fractions of waste are directed from the expanded cascade separator (16) to the cyclone dust collector (18), from where they are removed by means of a regulation dumper (13), preferably to a magnetic separator or directly to the external tank (14), as another fraction of isolated metallurgical waste, and the regulation dumper (13) is preferably closed during operation of the cyclone dust collector (18).

Description

[0021] The subject of invention is demonstrated in the embodiment, in the drawing presenting the scheme of separator for cleaning fine metallurgical waste material.

[0022] As shown in the drawing, a loose material, usually with diameter below 5 mm, is fed, through the feeding tank 1, to the developed separator for cleaning fine metallurgical waste material. By means of the loose material feeder 2 (e.g. screw or bucket feeder, etc.) this loose material is moved to the vertically oriented initial separator 3, preferably of cascade type, which operates on the principles known so far. The air is blown into the initial separator 3 by the fan 4, preferably through the regulation damper 5, producing overpressure inside of initial separator 3 and giving velocity to the particles of initially cleaned and separated material. The most dusty fractions, which raise up along with the air in the initial separator 3 are discharged to the collector 6, while the thickest fractions of metallurgical waste material, due to gravity and their own weight, fall down to its lower part, from where they are carried away, by an ascending cascade pipeline 7, to the cascade separator 8. However individual sections 9 of the cascade pipeline 7 are of various diameters or are not arranged coaxially or are equipped with cascades or may be spirally shaped, so that during transportation of preselected material, its flow is disturbed and the fractionsusually the heaviest oneschange the direction of movement, which additionally facilitates breaking and cleaning of the grain surface. The operation [principle of the cascade pipeline 7 consists in change of movement trajectory of the particles transported pneumatically in a two-phase stream, ending preferably with nozzle 10, which increases flow rate of the preselected material, which may undergo further technological operations. The waste transported upstream the cascade pipeline 7 are directed to bumper 11 in the cascade separator 8 and then come across cascades 12 located above and under the bumper, consequently the material is additionally refined and dispersed and the efficiency of grain separation and cleaning is increased. Whereby the cascades 12 are arranged askew, in certain distance from each other, they are inclined downwards, and vertically they overlap, so to say. The material to be cleaned is introduced to cascade separator 8 and is poured on the cascades 12 downwards, being blown through, and while the largest fractions fall down to the bottom of the cascade separator 8 due to gravity and their own weight, the lighter fractions move upwards. So to say On their way up the fractions come across cascades 12, that additionally obstruct the movement up of the heavier grain and thus support separation of larger fractions. The larger fractions that accumulate at the bottom of the cascade separator 8 are removed by means of regulation damper 13, through which the air is sucked in and the smallest fractions of material are lifted up. Through the regulation damper 13 the fine grained material is moved, preferably to a magnetic separator, or directly to the external tank 14. On the other hand, the lighter fractions moving upwards and collected in cascade separator 8 are directed to the collector 6 and then to the next cascade separator 15, where the cleaning process is analogical to cascade separator 8. From the cascade separator 8, analogically, through a regulation damper 13 next fraction, of determined grain size and weight, is collected, preferably to a magnetic separator, or directly to the external tank 14.

[0023] Whereas the lighter and finer fractions of the metallurgical waste, that are isolated as described above, are directed to expanded cascade separator 16, where the stream hits the area of adjustable, basically vertical cascades 17, creating a shutter, so to say, the angle of which may be additionally adjusted. The adjustable cascades 17 overlap and they are arranged basically vertically, and the material directed at them hits them and slides down from one cascade onto another, lower cascade, and finally the largest fractions find their way to the main column of the expanded cascade separator 16. Analogically, the largest fraction is removed through a regulation damper 13 preferably to a magnetic separator, or directly to the external tank 14, whereas the lightest, hovering fractions are directed to the cyclone dust collector 18.

[0024] The material directed to the cyclone dust collector 18 goes inside tangentially to the internal walls of the conical housing of the cyclone dust collector 18, which causes the whirl of material and subjects the material to centrifugal force. Consequently, lighter fractions concentrate on the walls and slide down, where they are removed analogically through a regulation damper 13 directly to the external tank 14 as a next fraction of material, whereas the regulation damper 13 during operation of cyclone dust collector is preferably closed. The lightest, dust fractionsisolated during the described process, carried out on cooperating and arranged in series separators, creating an assembly that may be developed to include greater quantity of separators (depending on the number of fractions and the physical and chemical properties of the material we want to obtain), at the end of such assembly there is a cyclone dust collector 18and the lightest fractions are sucked from the middle part of the cyclone dust collector 18 and are introduced to the filter 19, preferably a jet filter. And at the outlet 20, through which clean air is let outside, possibly additional negative pressure is created by means of fans or suction pumps 21. The remaining dust is collected, as the most isolated and lightest fraction of the cleaned material, in the external tank 14.

LIST OF ELEMENTS

[0025] 1feeding tank, [0026] 2feeding mechanism, [0027] 3initial cascade separator, [0028] 4fan, [0029] 5damper, [0030] 6collector, [0031] 7cascade pipeline, [0032] 8cascade separator, [0033] 9section (of a pipeline), [0034] 10nozzle, [0035] 11bumper, [0036] 12cascade, [0037] 13regulation valve/damper, [0038] 14external tank, [0039] 15next cascade separator, [0040] 16expanded cascade separator, [0041] 17adjustable cascade, [0042] 18cyclone dust collector, [0043] 19filter, [0044] 20outlet (of air), [0045] 21suction pump.