CA2054410A1 - Process and apparatus for the preparation of bulk materials - Google Patents
Process and apparatus for the preparation of bulk materialsInfo
- Publication number
- CA2054410A1 CA2054410A1 CA002054410A CA2054410A CA2054410A1 CA 2054410 A1 CA2054410 A1 CA 2054410A1 CA 002054410 A CA002054410 A CA 002054410A CA 2054410 A CA2054410 A CA 2054410A CA 2054410 A1 CA2054410 A1 CA 2054410A1
- Authority
- CA
- Canada
- Prior art keywords
- washing vessel
- bulk material
- pipeline system
- container
- thermal treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/18—Plants for preparing mould materials
- B22C5/185—Plants for preparing mould materials comprising a wet reclamation step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
- F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Abstract:
A process and an apparatus for the preparation of bulk materials, especially for the preparation of fragmentary fractions and/or pourable materials are proposed, by means of which the bulk material can be prepared to assume a quality of substantially new value.
The apparatus (100) comprises a first washing vessel (30), a second washing vessel (40) as well as a drum-type furnace (220) which is connected to this via a line (14) and in which is arranged an externally heatable pipeline system (240) rotatable about its longitudinal axis (X).
The bulk material is fed largely in free fall to the first washing vessel (30), is thereby subjected by a number of nozzles arranged in the interior to a high-pressure liquid medium and is subsequently cleaned and separated in the second washing vessel (40), whilst the cleaned bulk material is dried and thereafter guided for thermal treatment through the heated pipeline system (240).
(Fig. 1)
A process and an apparatus for the preparation of bulk materials, especially for the preparation of fragmentary fractions and/or pourable materials are proposed, by means of which the bulk material can be prepared to assume a quality of substantially new value.
The apparatus (100) comprises a first washing vessel (30), a second washing vessel (40) as well as a drum-type furnace (220) which is connected to this via a line (14) and in which is arranged an externally heatable pipeline system (240) rotatable about its longitudinal axis (X).
The bulk material is fed largely in free fall to the first washing vessel (30), is thereby subjected by a number of nozzles arranged in the interior to a high-pressure liquid medium and is subsequently cleaned and separated in the second washing vessel (40), whilst the cleaned bulk material is dried and thereafter guided for thermal treatment through the heated pipeline system (240).
(Fig. 1)
Description
20~10 Process and apparatus for the PreParation of bulk ~materials The invention relates to a process and an apparatus for the preparation of bulk materials, especially in the form of fragmentary fractions and/or pourable materials which are prepared by comminuting and/or wet treatment and by subsequent thermal treatment.
DE-A-2,252,259 makes known an apparatus for the recovery of basic foundry-mould materials, in which the basic mould material in the form of a mixture of lumps or individual grains is fed from a comminuting device via a screen to a metal separator and from there to an anneal-ing unit. In the annealing unit, the basic mould material is freed of substances containing carbon and is subse-quently cooled in an associated cooling device. In afurther device, the cooled basic mould material is treated and cleaned pneumatically and mechanically in such a way that the embrittled layer minerals flake off.
The sand regenerated and graded in this way is thereafter provided for reuse.
The present invention is concerned with the problem of an economical reuse of bulk materials, such as occur, for example, in the form of fractions containing metal and fractions fragmentary because of organic or chemical binders or else already in the form of pourable used foundry sands of various sand types.
The object on which the invention is based is to provide a process for the preparation of bulk materials in the form of fragmentary fractions and/or pourable materials and an apparatus, by means of which process and apparatus the bulk materials can be prepared to assume a reusable quality of substantially new value.
The object is achieved, by the process according to the invention, in that the bulk material is fed largely in free fall to a first washing vessel, is thereby subjected by a number of nozzles directed into the interior to a high-pressure liquid medium for the purpose of detaching the adhering dirt particles and is 20~4~10 subsequently cleaned and separated in an associated second washing vessel, and in that the cleaned bulk material is thereafter dried and guided for thermal treatment through an externally heated pipeline system rotatable about its longitudinal axis.
The apparatus according to the invention for carrying out the process comprises at least one first washing vessel and a drum-type furnace with a heatable combustion chamber for the thermal treatment of bulk materials and is characterised in that the first washing vessel is assigned a second washing vessel connected to it, the first washing vessel being equipped in its interior with a number of nozzles arranged axially and radially at a distance from one another, and the second washing vessel being connected, with a drying container interposed, to a spirally designed pipeline system arranged in the combustion chamber of the drum-type furnace, mounted rotatably about its longitudinal axis and intended for the thermal treatment of the dried bulk material.
Further features of the invention emerge from the following description in conjunction with the drawing and the patent claims.
The invention is described in more detail below with reference to the drawing. In this:
Figure l shows an apparatus, represented as a flow diagram, with a cleaning device and with an associated drum-type furnace for the prepara-tion of bulk materials, Figure 2 shows a first exemplary embodiment of the cleaning device for the apparatus according to Figure 1, represented on a larger scale and in a sectional view, Figure 3 shows a second exemplary embodiment of the cleaning device for the apparatus according to Figure l, represented on a larger scale and in a sectional view, and Figure 4 shows the cleaning device according to Figure 3, represented in a top view and in section 205~410 along the line IV-IV.
Figure 1 shows as a flow diagram an apparatus, designated as a whole by 100, for the preparation of bulk materials, this apparatus 100 comprising essentially a diagrammatically represented cleaning device 50 or 150 and a drum-type furnace 220 connected to it via a feedline 14 or 114.
The drum-type furnace 220 can be assigned either one cleaning device 50 shown on a larger scale in Figure 2, or the other cleaning device 150 shown on a larger scale in Figure 3. The cleaning device 50 or 150 is assigned a transport and conveyor band 1, from which the so-called bulk material (not shown) is fed in the direction of the arrows 1' and 1" to a funnel-like collecting container 2. From a screen 3 movable to and fro in the direction of the arrow 3' by means (not shown), the bulk material is fed, approximately by pouring, to the cleaning device 50 or 150.
The drum-type furnace 220 and the two cleaning devices 50 and 150 are described in detail below.
The drum-type furnace 220 represented diagram-matically in Figure 1 comprises essentially a container 221 which is assigned in the front part designed as the entrance A a burner 231, by means of which the interior 221', designed as a combustion chamber, of the container 221 is heated.
In one exemplary embodiment not shown in any more detail, the container 221 can be subdivided into individual heatable zones, as seen in the longitudinal direction of the drum-type furnace 220. At the same time, a plurality of burner or heater elements arranged offset relative to one another are provided on the outer wall of the container.
At the rear part of the container 221 designed as an exit B, a first chamber 226, a filter device 222, a blower 225 and a second chamber 224 are provided.
Furthermore, a grating 223 is arranged between the first chamber 226 and the second chamber 224. The filter device 222 is connected to the entrance A of the container 221 2054~1~
via a line 227, with a blower 228 being interposed. The second chamber 224 is connected to a collecting container 230 via a line 229.
Arranged in the front region of the combustion chamber 221' of the container 221 is a distributor element 235 which, for example, is of container-like design and which is connected to a pipeline system 240 arranged in the container 221. The pipeline system 240 comprises at least one, but preferably a number of spirally wound pipes 241 which are each connected at one end to the feedline 14 or to the distributor element 235 and at the exit B to the first chamber 226. The single spiral pipe 241 or else the complete pipeline system 240 is connected operatively to a diagrammatically repre-sented drive 242 arranged correspondingly at the entrance A. The pipeline system 240 is mounted in the combustion chamber 221' of the container 221 rotatably about an approximately horizontal longitudinal axis X in the direction of the arrow Z.
In a preferred exemplary embodiment, the pipeline system 240 is arranged in the combustion chamber 221' of the container 221 about a longitudinal axis X' inclined upwards relative to the longitudinal axis X or about a longitudinal axis X" inclined downwards relative to the longitudinal axis X. The angle ~ or ~' formed between the horizontal axis X and the upwardly inclined or downwardly inclined longitudinal axis X~ or X" is respectively approximately of the order of 10 to 30~.
The container 221 is mounted, for example, on two pedestals 245, 245' arranged at a distance from one another in the axial direction of the container 221. The mounting of the container 221 on the two pedestals 245, 245' can also take place in the horizontal plane. When the container 221 is arranged horizontally, the pipeline system 240 is arranged in the combustion chamber 221' at the abovementioned upward inclination ~ or downward inclination ~'. With a coaxial arrangement of the pipeline system 240 in the combustion chamber 241', the container 221 is arranged and mounted correspondingly on ~0~4~10 two pedestals 245, 245' with its longitudinal axis X at a similar upward or downward inclination.
The pipe cross-section for the individual pipe 241 of the pipe system 240 installed in the drum-type furnace 220 can be of differing shape. In a way not shown in more detail, the pipe cross-section of the pipe shaped to form a spiral can, for example, be circular, square, rectangular, triangular, polygonol, offset squarely in parallel or the like. An essential feature of the cross-sectional shape of the pipe is, however, that theindividual spiral has as large a heat-transmission surface as possible.
The cleaning device 50 shown in ~igure 2 on a larger scale and in a sectional view comprises essen-tially a first washing vessel 30 and a second washingvessel 40 connected to this. The transport and conveyor band 1 appropriately assigned to the washing vessel 30l as well as the collecting container 2 and the screen 3 movable to and fro are of a design similar to that of the exemplary embodiment described withreference to Figure 1.
Arranged on the first washing vessel 30 is a diagrammatically represented pipeline system 25 which is connected via a feedline 16 to an appropriately assigned high-pressure pump 4. In the exemplary embodiment illustrated, the pipeline system 25 comprises ringlines 21, 22, 23 and 24 which are arran~ed at a distance from one another in the axial direction of the first washing vessel 30 and largely surround the outer circumference of the washing vessel 30 and which are connected to the high-pressure pump 4 via corresponding bridge lines 17 and 18, 18' and 19, 19' connected to the feedline 16~
In the interior 35 of the first washing vessel 30 there is a plurality of nozzles 21', 22', 23' and 24' which are arranged circumferentially and axially at a distance from one another and which are fastened to the vessel wall 30' in a way not shown in any more detail and are connected to the individual ringlines 21, 22, 23 and 24 arranged correspondingly on the outer circumference of the washing vessel 30.
20~441~
Arranged on the first washing vessel 30 at tlle lower end facing the second washing vessel 40 is a connecting flange 31 which is provided with an annular ~3roove 31' for the sealing mounting of the second washing vessel 40.
The second washing vessel 40 fastened to the first washing vessel 30 by means (not shown) and, for example, forming a unit with this comprises essentially a cylindrical body 42 arranged in the annular groove 31' of the first washing vessel 30 and a flange 41 located on it. A filter element 43 is arranged in the interior 45 of the cylindrical body 42 which can be designed, for example, as a steel jacket or, to reveal its functioning, as a transparent body. The interior 45 of the cylindrical body 42 is subdivided by the filter element 43 into a first chamber 45' for the actual bulk material (not shown) and into a second chamber 46 for detached washings 47 resting on the bottom of the annular chamber 46. An essentially funnel-like orifice 44 is provided for emptying in the lower flange 41.
Furthermore, on the second washing vessel 40, a line 8 connected to the orifice 44 and arranged sealed off on the lower flange 41 is connected to a shut-off valve 9~ The line 8 leads to an appropriately associated container 6 which is preferably equipped with a screen 7 and which, with a valve 13 interposed, is connected to a filter press 5 via a return line 12.
The fluid is fed via the return line 12 in the direction of the arrow 12' by way of the filter press 5 and via a line 15 in the direction of the arrow 15' to the high-pressure pump 4 again and from there by way of the pipeline system 25 to the first washing vessel 30 once more.
The cleaned sand (not shown) is fed for thermal treatment to the drum-type furnace 220 in the direction of the arrow 14' via the line 14. As shown in Figure 1, a slide 203 can be arranged in the line 14 between the container 6 and the drum-type furnace 220 and is connected operatively to an appropriately controllable 20~41~
piston/cylinder unit 202 for opening and closing.
Moreover, connected to the lower flange 41 of the second washing vessel 40, with a valve 10 interposed, is a line 11, via which the washings 47 are fed to the filter press 5 in the direction of the arrow 10'. The residual fluid precipitated from the filter press 5 is likewise fed to the high-pressure pump 4 in the direction of the arrow 15' by way of the line 15, whilst the remaining solids are fed via a line 11~ in the direction of the arrow 11" to an installation (not shown) for further processing.
Figure 3 shows the washing device 150 on a larger scale and in a sectional view, and a first washing vessel 130 and a second washing vessel 140 connected to this can be seen. The transport and conveyor band 1 appropriately assigned to the washing vessel 130, as well as the collecting container 2 and the screen 3 movable to and fro are of a design similar to that of the exemplary embodiment described with reference to ~igure 1.
Arranged on the first washing vessel 130 is a diagrammatically represented pipeline system, designated as a whole by 125, which is connected to a correspon-dingly associated high-pressure pump 104 via a feedline 116 designed as a bridge line.
As seen in the axial direction of the washing vessel 130, the pipeline system 125 comprises a plurality of ringlines 121, 120, 119, 118 and 117 which are arranged at a distance from one another and surround approximately half the outer circumference of the vessel 130 and which are connected to the high-pressure pump 104 via the corresponding feedline 116.
In the interior 135 of the washing vessel 130, appropriately designed high-pressure nozzles are assigned to each individual ringline 121, 120, 119, 118 and 117.
The high-pressure nozzles forming respective groups are designated by 121', 120', 119', 118' and 117', the individual high-pressure nozzles ~eing fastened to the vessel wall 130' in a way not shown in any more detail.
On the side located opposite the high-pressure nozzle 2~4~0 groups 121', 120~, 119', 118' and 117', an appropriately arranged and fastened baffle plate 136 is provided in the interior 135 of the washing vessel 130. ~ocated on the first washing vessel 130 at the lower end facing the second washing vessel 140 is a connecting flange 131 which is provided with an annular groove 131' for the sealing mounting of the second washing vessel 140.
The second washing vessel 140 fastened to the first washing vessel 130 by means (not shown) and forming a unit with this comprises essentially a cylindrical body 142 arranged in the annular groove 131' of the first washing vessel 130 and a flange 141 located on it. A
filter element 143 is arranged in the interior 145 of the cylindrical body 142 which, for example, can be designed as a steel jacket or, to reveal the functioning, as a transparent body. The interior 145 of the cylindrical body 142 is subdivided by the filter element 143 into a first chamber 145' for the actual bulk material (not shown) and into a second chamber 146 for detached washings 147. An approximately funnel-like orifice 144 is provided for emptying in the lower flange 141.
Furthermore, on the second washing vessel 140, a line 108 arranged sealed off on the lower flange 141 is connected to a shut-off valve 109. The line 108 leads to an appropriately associated container 106 which is preferably equipped with a screen 107 and which, with a valve 113 interposed, is connected to a filter press 105 via a return line 112. The cleaned sand is fed essentially to the drum-type furnace 220 (Figure 1) in the direction of the arrow 114' for thermal treatment by way of the line 114, whilst the fluid is fed via the line 112 in the direction of the arrow 112' to the filter press 105 and via a line 115 in the direction of the arrow 115' to the high-pressure pump 104 and from there by way of the pipeline system 125 to the first washing vessel 130 once more.
Furthermore, connected to the lower flange 141 of the second washing ve~sel 140, with a valve 110 inter-posed, is a line 111, by way of which the washings 147 2~4~
are fed to the filter press 105 in the direction of the arrow 110'. The fluid separated by the filter press 105 is fed to the high-pressure pump 104 in the direction of the arrow 115' via the line 115, whilst the remaining solids are fed for use in the direction of the arrow 111~
via a line 111' to an installation (not shown) for further processing.
It may be pointed out, at this juncture, that a sound transducer 80 or 180 connected operatively to an ultrasonic device 85 or 185 can be respectively arranged in the second washing vessel 40 according to Figure 2 and in the second washing vessel 140 according to Figure 3.
By means of the sound transducers 80 or 180 a permanent movement of the bulk material is additionally generated in the washing vessel 40 or 140, thereby ensuring that the dirt particles are further detached.
Moreover, in an alternative embodiment (not shown)~ there is the possibility of assigning to the second washing vessel 40 or 140, instead of to the first washing vessel 30 or 130, a screen-like collecting element, on which the bulk material fed from the container 2 rests and is subjected to the high-pressure liquid medium for detaching the adhering dirt particles.
The nozzles are directed at an appropriate angle to the bulk material or to the screen-like collecting element.
Figure 4 shows the washing device 150 represented in section along the line IV-IV of Figure 3 and in a top view, and the washing vessel 130 and the pipeline system 125 arranged on it and having a ringline 118 connected to the feedline 116 can be seen. In the interior 135 can be seen the baffle plate 136 arranged and fastened on the inner wall 130' and the high-pressure nozzle group designated as a whole by 118'. The individual high-pressure nozzles not designated in any more detail are arranged at a distance from one another on the vessel wall 130' in the circumferential direction and are fastened to this in a way not shown in any more detail.
The essential working steps of the apparatus 100 are described below:
, 20~4~1~
The so-called bulk material is fed from the tr~nsport and conveyor band 1 in the direction of the arrows 1' and 1" to the first washing vessel 30 or 130, in which the free-falling bulk material is subjected to a liquid medium, for example a water jet, by means of a plurality of high-pressure nozzles 21', 22', 23', 24' or 121', 120', 119~, 118', 117' arranged appropriately distributed.
In a second washins vessel 40 or 140, the dirt particles or washings are separated from the bulk material by the filter 43 or 143. With the slide 9 or 109 opened, the bulk material thus cleaned passes into the container 6 or 106 equipped with a screen 7 or 107 and is dried correspondingly in this.
For thermal treatment, the bulk material is fed from the container 6 or 106 by way of the line 14 or 114 to the pipeline system 240 connected operatively to the distributor element 235.
As a result of the rotational movement, oriented in the direction of the arrow Z about the longitudinal axis X or X' or X", of the pipeline system 240 arranged in the combustion chamber 221', the bulk material is transported in the direction of the arrow 220' and optimum heating of the material thereby achieved. The bulk material conveyed through the pipeline system 240 by pouring as a result of the rotational movement is guided into the chamber 226 and is subjected in this to the air-stream of the blower 225, with the result that the remaining gases and fine particles are removed from the sand. The remaining gases and fine particles are fed from the blower 225 via the filter device 222 and via the return line 227 in the direction of the arrow 227' for complete combustion in the combustion chamber 221'.
The cleaned material which has fallen into the chamber 224 can be fed from there in the direction of the arrow 229' to a container 230 by way of a line 229 and thereafter be used as material of largely new value.
DE-A-2,252,259 makes known an apparatus for the recovery of basic foundry-mould materials, in which the basic mould material in the form of a mixture of lumps or individual grains is fed from a comminuting device via a screen to a metal separator and from there to an anneal-ing unit. In the annealing unit, the basic mould material is freed of substances containing carbon and is subse-quently cooled in an associated cooling device. In afurther device, the cooled basic mould material is treated and cleaned pneumatically and mechanically in such a way that the embrittled layer minerals flake off.
The sand regenerated and graded in this way is thereafter provided for reuse.
The present invention is concerned with the problem of an economical reuse of bulk materials, such as occur, for example, in the form of fractions containing metal and fractions fragmentary because of organic or chemical binders or else already in the form of pourable used foundry sands of various sand types.
The object on which the invention is based is to provide a process for the preparation of bulk materials in the form of fragmentary fractions and/or pourable materials and an apparatus, by means of which process and apparatus the bulk materials can be prepared to assume a reusable quality of substantially new value.
The object is achieved, by the process according to the invention, in that the bulk material is fed largely in free fall to a first washing vessel, is thereby subjected by a number of nozzles directed into the interior to a high-pressure liquid medium for the purpose of detaching the adhering dirt particles and is 20~4~10 subsequently cleaned and separated in an associated second washing vessel, and in that the cleaned bulk material is thereafter dried and guided for thermal treatment through an externally heated pipeline system rotatable about its longitudinal axis.
The apparatus according to the invention for carrying out the process comprises at least one first washing vessel and a drum-type furnace with a heatable combustion chamber for the thermal treatment of bulk materials and is characterised in that the first washing vessel is assigned a second washing vessel connected to it, the first washing vessel being equipped in its interior with a number of nozzles arranged axially and radially at a distance from one another, and the second washing vessel being connected, with a drying container interposed, to a spirally designed pipeline system arranged in the combustion chamber of the drum-type furnace, mounted rotatably about its longitudinal axis and intended for the thermal treatment of the dried bulk material.
Further features of the invention emerge from the following description in conjunction with the drawing and the patent claims.
The invention is described in more detail below with reference to the drawing. In this:
Figure l shows an apparatus, represented as a flow diagram, with a cleaning device and with an associated drum-type furnace for the prepara-tion of bulk materials, Figure 2 shows a first exemplary embodiment of the cleaning device for the apparatus according to Figure 1, represented on a larger scale and in a sectional view, Figure 3 shows a second exemplary embodiment of the cleaning device for the apparatus according to Figure l, represented on a larger scale and in a sectional view, and Figure 4 shows the cleaning device according to Figure 3, represented in a top view and in section 205~410 along the line IV-IV.
Figure 1 shows as a flow diagram an apparatus, designated as a whole by 100, for the preparation of bulk materials, this apparatus 100 comprising essentially a diagrammatically represented cleaning device 50 or 150 and a drum-type furnace 220 connected to it via a feedline 14 or 114.
The drum-type furnace 220 can be assigned either one cleaning device 50 shown on a larger scale in Figure 2, or the other cleaning device 150 shown on a larger scale in Figure 3. The cleaning device 50 or 150 is assigned a transport and conveyor band 1, from which the so-called bulk material (not shown) is fed in the direction of the arrows 1' and 1" to a funnel-like collecting container 2. From a screen 3 movable to and fro in the direction of the arrow 3' by means (not shown), the bulk material is fed, approximately by pouring, to the cleaning device 50 or 150.
The drum-type furnace 220 and the two cleaning devices 50 and 150 are described in detail below.
The drum-type furnace 220 represented diagram-matically in Figure 1 comprises essentially a container 221 which is assigned in the front part designed as the entrance A a burner 231, by means of which the interior 221', designed as a combustion chamber, of the container 221 is heated.
In one exemplary embodiment not shown in any more detail, the container 221 can be subdivided into individual heatable zones, as seen in the longitudinal direction of the drum-type furnace 220. At the same time, a plurality of burner or heater elements arranged offset relative to one another are provided on the outer wall of the container.
At the rear part of the container 221 designed as an exit B, a first chamber 226, a filter device 222, a blower 225 and a second chamber 224 are provided.
Furthermore, a grating 223 is arranged between the first chamber 226 and the second chamber 224. The filter device 222 is connected to the entrance A of the container 221 2054~1~
via a line 227, with a blower 228 being interposed. The second chamber 224 is connected to a collecting container 230 via a line 229.
Arranged in the front region of the combustion chamber 221' of the container 221 is a distributor element 235 which, for example, is of container-like design and which is connected to a pipeline system 240 arranged in the container 221. The pipeline system 240 comprises at least one, but preferably a number of spirally wound pipes 241 which are each connected at one end to the feedline 14 or to the distributor element 235 and at the exit B to the first chamber 226. The single spiral pipe 241 or else the complete pipeline system 240 is connected operatively to a diagrammatically repre-sented drive 242 arranged correspondingly at the entrance A. The pipeline system 240 is mounted in the combustion chamber 221' of the container 221 rotatably about an approximately horizontal longitudinal axis X in the direction of the arrow Z.
In a preferred exemplary embodiment, the pipeline system 240 is arranged in the combustion chamber 221' of the container 221 about a longitudinal axis X' inclined upwards relative to the longitudinal axis X or about a longitudinal axis X" inclined downwards relative to the longitudinal axis X. The angle ~ or ~' formed between the horizontal axis X and the upwardly inclined or downwardly inclined longitudinal axis X~ or X" is respectively approximately of the order of 10 to 30~.
The container 221 is mounted, for example, on two pedestals 245, 245' arranged at a distance from one another in the axial direction of the container 221. The mounting of the container 221 on the two pedestals 245, 245' can also take place in the horizontal plane. When the container 221 is arranged horizontally, the pipeline system 240 is arranged in the combustion chamber 221' at the abovementioned upward inclination ~ or downward inclination ~'. With a coaxial arrangement of the pipeline system 240 in the combustion chamber 241', the container 221 is arranged and mounted correspondingly on ~0~4~10 two pedestals 245, 245' with its longitudinal axis X at a similar upward or downward inclination.
The pipe cross-section for the individual pipe 241 of the pipe system 240 installed in the drum-type furnace 220 can be of differing shape. In a way not shown in more detail, the pipe cross-section of the pipe shaped to form a spiral can, for example, be circular, square, rectangular, triangular, polygonol, offset squarely in parallel or the like. An essential feature of the cross-sectional shape of the pipe is, however, that theindividual spiral has as large a heat-transmission surface as possible.
The cleaning device 50 shown in ~igure 2 on a larger scale and in a sectional view comprises essen-tially a first washing vessel 30 and a second washingvessel 40 connected to this. The transport and conveyor band 1 appropriately assigned to the washing vessel 30l as well as the collecting container 2 and the screen 3 movable to and fro are of a design similar to that of the exemplary embodiment described withreference to Figure 1.
Arranged on the first washing vessel 30 is a diagrammatically represented pipeline system 25 which is connected via a feedline 16 to an appropriately assigned high-pressure pump 4. In the exemplary embodiment illustrated, the pipeline system 25 comprises ringlines 21, 22, 23 and 24 which are arran~ed at a distance from one another in the axial direction of the first washing vessel 30 and largely surround the outer circumference of the washing vessel 30 and which are connected to the high-pressure pump 4 via corresponding bridge lines 17 and 18, 18' and 19, 19' connected to the feedline 16~
In the interior 35 of the first washing vessel 30 there is a plurality of nozzles 21', 22', 23' and 24' which are arranged circumferentially and axially at a distance from one another and which are fastened to the vessel wall 30' in a way not shown in any more detail and are connected to the individual ringlines 21, 22, 23 and 24 arranged correspondingly on the outer circumference of the washing vessel 30.
20~441~
Arranged on the first washing vessel 30 at tlle lower end facing the second washing vessel 40 is a connecting flange 31 which is provided with an annular ~3roove 31' for the sealing mounting of the second washing vessel 40.
The second washing vessel 40 fastened to the first washing vessel 30 by means (not shown) and, for example, forming a unit with this comprises essentially a cylindrical body 42 arranged in the annular groove 31' of the first washing vessel 30 and a flange 41 located on it. A filter element 43 is arranged in the interior 45 of the cylindrical body 42 which can be designed, for example, as a steel jacket or, to reveal its functioning, as a transparent body. The interior 45 of the cylindrical body 42 is subdivided by the filter element 43 into a first chamber 45' for the actual bulk material (not shown) and into a second chamber 46 for detached washings 47 resting on the bottom of the annular chamber 46. An essentially funnel-like orifice 44 is provided for emptying in the lower flange 41.
Furthermore, on the second washing vessel 40, a line 8 connected to the orifice 44 and arranged sealed off on the lower flange 41 is connected to a shut-off valve 9~ The line 8 leads to an appropriately associated container 6 which is preferably equipped with a screen 7 and which, with a valve 13 interposed, is connected to a filter press 5 via a return line 12.
The fluid is fed via the return line 12 in the direction of the arrow 12' by way of the filter press 5 and via a line 15 in the direction of the arrow 15' to the high-pressure pump 4 again and from there by way of the pipeline system 25 to the first washing vessel 30 once more.
The cleaned sand (not shown) is fed for thermal treatment to the drum-type furnace 220 in the direction of the arrow 14' via the line 14. As shown in Figure 1, a slide 203 can be arranged in the line 14 between the container 6 and the drum-type furnace 220 and is connected operatively to an appropriately controllable 20~41~
piston/cylinder unit 202 for opening and closing.
Moreover, connected to the lower flange 41 of the second washing vessel 40, with a valve 10 interposed, is a line 11, via which the washings 47 are fed to the filter press 5 in the direction of the arrow 10'. The residual fluid precipitated from the filter press 5 is likewise fed to the high-pressure pump 4 in the direction of the arrow 15' by way of the line 15, whilst the remaining solids are fed via a line 11~ in the direction of the arrow 11" to an installation (not shown) for further processing.
Figure 3 shows the washing device 150 on a larger scale and in a sectional view, and a first washing vessel 130 and a second washing vessel 140 connected to this can be seen. The transport and conveyor band 1 appropriately assigned to the washing vessel 130, as well as the collecting container 2 and the screen 3 movable to and fro are of a design similar to that of the exemplary embodiment described with reference to ~igure 1.
Arranged on the first washing vessel 130 is a diagrammatically represented pipeline system, designated as a whole by 125, which is connected to a correspon-dingly associated high-pressure pump 104 via a feedline 116 designed as a bridge line.
As seen in the axial direction of the washing vessel 130, the pipeline system 125 comprises a plurality of ringlines 121, 120, 119, 118 and 117 which are arranged at a distance from one another and surround approximately half the outer circumference of the vessel 130 and which are connected to the high-pressure pump 104 via the corresponding feedline 116.
In the interior 135 of the washing vessel 130, appropriately designed high-pressure nozzles are assigned to each individual ringline 121, 120, 119, 118 and 117.
The high-pressure nozzles forming respective groups are designated by 121', 120', 119', 118' and 117', the individual high-pressure nozzles ~eing fastened to the vessel wall 130' in a way not shown in any more detail.
On the side located opposite the high-pressure nozzle 2~4~0 groups 121', 120~, 119', 118' and 117', an appropriately arranged and fastened baffle plate 136 is provided in the interior 135 of the washing vessel 130. ~ocated on the first washing vessel 130 at the lower end facing the second washing vessel 140 is a connecting flange 131 which is provided with an annular groove 131' for the sealing mounting of the second washing vessel 140.
The second washing vessel 140 fastened to the first washing vessel 130 by means (not shown) and forming a unit with this comprises essentially a cylindrical body 142 arranged in the annular groove 131' of the first washing vessel 130 and a flange 141 located on it. A
filter element 143 is arranged in the interior 145 of the cylindrical body 142 which, for example, can be designed as a steel jacket or, to reveal the functioning, as a transparent body. The interior 145 of the cylindrical body 142 is subdivided by the filter element 143 into a first chamber 145' for the actual bulk material (not shown) and into a second chamber 146 for detached washings 147. An approximately funnel-like orifice 144 is provided for emptying in the lower flange 141.
Furthermore, on the second washing vessel 140, a line 108 arranged sealed off on the lower flange 141 is connected to a shut-off valve 109. The line 108 leads to an appropriately associated container 106 which is preferably equipped with a screen 107 and which, with a valve 113 interposed, is connected to a filter press 105 via a return line 112. The cleaned sand is fed essentially to the drum-type furnace 220 (Figure 1) in the direction of the arrow 114' for thermal treatment by way of the line 114, whilst the fluid is fed via the line 112 in the direction of the arrow 112' to the filter press 105 and via a line 115 in the direction of the arrow 115' to the high-pressure pump 104 and from there by way of the pipeline system 125 to the first washing vessel 130 once more.
Furthermore, connected to the lower flange 141 of the second washing ve~sel 140, with a valve 110 inter-posed, is a line 111, by way of which the washings 147 2~4~
are fed to the filter press 105 in the direction of the arrow 110'. The fluid separated by the filter press 105 is fed to the high-pressure pump 104 in the direction of the arrow 115' via the line 115, whilst the remaining solids are fed for use in the direction of the arrow 111~
via a line 111' to an installation (not shown) for further processing.
It may be pointed out, at this juncture, that a sound transducer 80 or 180 connected operatively to an ultrasonic device 85 or 185 can be respectively arranged in the second washing vessel 40 according to Figure 2 and in the second washing vessel 140 according to Figure 3.
By means of the sound transducers 80 or 180 a permanent movement of the bulk material is additionally generated in the washing vessel 40 or 140, thereby ensuring that the dirt particles are further detached.
Moreover, in an alternative embodiment (not shown)~ there is the possibility of assigning to the second washing vessel 40 or 140, instead of to the first washing vessel 30 or 130, a screen-like collecting element, on which the bulk material fed from the container 2 rests and is subjected to the high-pressure liquid medium for detaching the adhering dirt particles.
The nozzles are directed at an appropriate angle to the bulk material or to the screen-like collecting element.
Figure 4 shows the washing device 150 represented in section along the line IV-IV of Figure 3 and in a top view, and the washing vessel 130 and the pipeline system 125 arranged on it and having a ringline 118 connected to the feedline 116 can be seen. In the interior 135 can be seen the baffle plate 136 arranged and fastened on the inner wall 130' and the high-pressure nozzle group designated as a whole by 118'. The individual high-pressure nozzles not designated in any more detail are arranged at a distance from one another on the vessel wall 130' in the circumferential direction and are fastened to this in a way not shown in any more detail.
The essential working steps of the apparatus 100 are described below:
, 20~4~1~
The so-called bulk material is fed from the tr~nsport and conveyor band 1 in the direction of the arrows 1' and 1" to the first washing vessel 30 or 130, in which the free-falling bulk material is subjected to a liquid medium, for example a water jet, by means of a plurality of high-pressure nozzles 21', 22', 23', 24' or 121', 120', 119~, 118', 117' arranged appropriately distributed.
In a second washins vessel 40 or 140, the dirt particles or washings are separated from the bulk material by the filter 43 or 143. With the slide 9 or 109 opened, the bulk material thus cleaned passes into the container 6 or 106 equipped with a screen 7 or 107 and is dried correspondingly in this.
For thermal treatment, the bulk material is fed from the container 6 or 106 by way of the line 14 or 114 to the pipeline system 240 connected operatively to the distributor element 235.
As a result of the rotational movement, oriented in the direction of the arrow Z about the longitudinal axis X or X' or X", of the pipeline system 240 arranged in the combustion chamber 221', the bulk material is transported in the direction of the arrow 220' and optimum heating of the material thereby achieved. The bulk material conveyed through the pipeline system 240 by pouring as a result of the rotational movement is guided into the chamber 226 and is subjected in this to the air-stream of the blower 225, with the result that the remaining gases and fine particles are removed from the sand. The remaining gases and fine particles are fed from the blower 225 via the filter device 222 and via the return line 227 in the direction of the arrow 227' for complete combustion in the combustion chamber 221'.
The cleaned material which has fallen into the chamber 224 can be fed from there in the direction of the arrow 229' to a container 230 by way of a line 229 and thereafter be used as material of largely new value.
Claims (8)
1. Process for the preparation of bulk materials, especially in the form of fragmentary fractions and/or pourable materials which are prepared by comminuting and/or wet treatment and by subsequent thermal treatment, characterised in that the bulk material is fed largely in free fall to a first washing vessel (30;130), is thereby subjected by a number of nozzles directed into the interior (35;45) to a high-pressure liquid medium for the purpose of detaching the adhering dirt particles and is subsequently cleaned and separated in an associated second washing vessel (40,140), and in that the cleaned bulk material is thereafter dried and guided for thermal treatment through an externally heated pipeline system (240) rotatable about its longitudinal axis (X).
2. Process according to Claim 1, characterised in that, before thermal treatment, the bulk material is additionally cleaned of the residual still adhering dirt particles in the second washing vessel (40,140) filled with an appropriate fluid, as a result of a permanent movement of the bulk material and of the fluid, the permanent movement being generated by ultrasonic vibra-tions.
3. Apparatus for carrying out the process according to Claim 1, consisting of at least one first washing vessel and of a drum-type furnace with a heatable combus-tion chamber for the thermal treatment of bulk materials, characterised in that the first washing vessel (30;130) is assigned a second washing vessel (40;140) connected to it, the first washing vessel (30;130) being equipped in its interior (35;135) with a number of nozzles (21', 22', 23', 24';121', 120', 119', 118', 117') arranged axially and radially at a distance from one another, and the second washing vessel (40;140) being connected, with a drying container (6;106) interposed, to a spirally designed pipeline system (240) arranged in the combustion chamber (221') of the drum-type furnace (220), mounted rotatably about its longitudinal axis (X) and intended for the thermal treatment of the dried bulk material.
4. Apparatus according to Claim 3, characterised in that the first washing vessel (30;130) is assigned a pipeline system (25;125) which is formed from a plurality of ringlines (21, 22, 23, 24; 121, 120, 119, 118, 117) surrounding the outer circumference of the washing vessel and which is connected to the nozzles (21', 22', 23', 24'; 121', 120', 119', 118', 117'), on the one hand, and via at least one bridge line (16;116) to a high-pressure pump (4;104), on the other hand.
5. Apparatus according to one of Claims 3 and 4, characterised in that a baffle plate (136) is provided in the interior (135) of the first washing vessel (130) on the side located opposite the nozzles (121', 120', 119', 118', 117').
6. Apparatus according to Claim 3, characterised in that an ultrasonic device (85;185) equipped with at least one sound transducer (80;180) is arranged in the second washing vessel (40;140).
7. Apparatus according to Claim 3, characterised in that the first washing vessel (30;130) and the second washing vessel (40,140) are designed as a constructional unit.
8. Apparatus according to Claim 3, characterised - in that, as seen in the longitudinal direction, the container (221) of the drum-type furnace (220) is subdivided into individual heatable zones and is equipped on the outer wall of the container with burner or heater elements arranged offset relative to one another, - in that the motor-driven pipeline system (240) mounted in the container (221) rotatably about the longitudinal axis (X) is designed at one end for receiving the bulk material and at the other end for delivering it, and - in that the pipeline system (240) is arranged coaxially in the combustion chamber (221') and comprises a number of spirally intertwisted pipes (241) which are each, as seen in profile cross-section, either square, rectangular, triangular, polygonol or offset in parallel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH02412/91A CH688434A5 (en) | 1991-08-15 | 1991-08-15 | Method and apparatus for processing bulk materials. |
| CH02412/91-3 | 1991-08-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2054410A1 true CA2054410A1 (en) | 1993-02-16 |
Family
ID=4233199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002054410A Abandoned CA2054410A1 (en) | 1991-08-15 | 1991-10-29 | Process and apparatus for the preparation of bulk materials |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0528070A1 (en) |
| JP (1) | JPH0550178A (en) |
| KR (1) | KR930003999A (en) |
| CN (1) | CN1069433A (en) |
| AU (1) | AU8489991A (en) |
| BR (1) | BR9104696A (en) |
| CA (1) | CA2054410A1 (en) |
| CH (1) | CH688434A5 (en) |
| CZ (1) | CZ291191A3 (en) |
| FI (1) | FI914455A (en) |
| HU (1) | HUT64491A (en) |
| MX (1) | MX9101486A (en) |
| NO (1) | NO913662L (en) |
| PL (1) | PL291777A1 (en) |
| PT (1) | PT99046A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2708873B1 (en) * | 1993-08-11 | 1995-12-08 | Transbiotech | Method for washing granular and / or particulate materials. |
| ATE215403T1 (en) | 1996-12-11 | 2002-04-15 | Earth Sciences Ltd | METHOD AND DEVICE FOR PROCESSING AND TREATING PARTICLE-SHAPED MATERIAL |
| ES2288867T3 (en) * | 1999-08-30 | 2008-02-01 | Biogenesis Enterprises, Inc. | APPARATUS AND PROCEDURE TO ELIMINATE THE CONTAMINANTS CONTAINED IN FINE GRAIN, CLAY AND LIME SOILS. |
| EP2351637A1 (en) * | 2008-11-05 | 2011-08-03 | Du Pont-Mitsui Polychemicals Co., Ltd. | Resin pellet cleaning method |
| DE102009029702A1 (en) * | 2009-06-20 | 2011-05-26 | Srs Deponiebau Gmbh | Granular soil material i.e. track construction ballast, cleaning method, involves subjecting granular soil material to ultrasonic vibration and guiding soil material by conveying device under ultrasonic generator |
| DE102012011384A1 (en) * | 2012-06-11 | 2013-12-12 | DEANTEC GmbH | Apparatus for regenerating inorganically bound foundry sands |
| CN109848101A (en) * | 2018-12-03 | 2019-06-07 | 王亚萍 | A kind of integrated circuit processing cleaning equipment |
| CN112264373B (en) * | 2020-09-30 | 2022-08-02 | 云南白药集团文山七花有限责任公司 | Automatic pseudo-ginseng processing production line |
| CN117383277B (en) * | 2023-10-13 | 2024-04-02 | 无锡裕鑫晟材料科技有限公司 | Nanometer titanium dioxide powder preparation feeder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4008856A (en) * | 1975-09-17 | 1977-02-22 | Sears Edward A | Reclaiming system for foundry sand |
| FR2338745A1 (en) * | 1976-01-22 | 1977-08-19 | Nemours Cie Fse Silices Sables | Granular minerals continuous purificn. - by subjecting a mixt. of water and a mineral to ultra-sonic waves |
| DE3728201A1 (en) * | 1987-08-24 | 1989-03-09 | Siemens Ag | Soil-cleaning method and appliance for carrying it out |
-
1991
- 1991-08-15 CH CH02412/91A patent/CH688434A5/en not_active IP Right Cessation
- 1991-09-13 EP EP91115504A patent/EP0528070A1/en not_active Withdrawn
- 1991-09-17 NO NO91913662A patent/NO913662L/en unknown
- 1991-09-19 PL PL29177791A patent/PL291777A1/en unknown
- 1991-09-23 FI FI914455A patent/FI914455A/en not_active Application Discontinuation
- 1991-09-23 CZ CS912911A patent/CZ291191A3/en unknown
- 1991-09-25 PT PT99046A patent/PT99046A/en not_active Application Discontinuation
- 1991-09-26 HU HU913085A patent/HUT64491A/en unknown
- 1991-10-01 AU AU84899/91A patent/AU8489991A/en not_active Abandoned
- 1991-10-09 MX MX9101486A patent/MX9101486A/en unknown
- 1991-10-14 KR KR1019910018039A patent/KR930003999A/en not_active Application Discontinuation
- 1991-10-19 CN CN91109842A patent/CN1069433A/en active Pending
- 1991-10-29 CA CA002054410A patent/CA2054410A1/en not_active Abandoned
- 1991-10-30 BR BR919104696A patent/BR9104696A/en not_active Application Discontinuation
- 1991-11-20 JP JP3329760A patent/JPH0550178A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CZ291191A3 (en) | 1993-02-17 |
| NO913662L (en) | 1993-02-16 |
| BR9104696A (en) | 1993-03-30 |
| HUT64491A (en) | 1994-01-28 |
| CN1069433A (en) | 1993-03-03 |
| PT99046A (en) | 1993-10-29 |
| MX9101486A (en) | 1993-02-01 |
| FI914455A (en) | 1993-02-16 |
| FI914455A0 (en) | 1991-09-23 |
| CH688434A5 (en) | 1997-09-30 |
| KR930003999A (en) | 1993-03-22 |
| AU8489991A (en) | 1993-02-18 |
| HU913085D0 (en) | 1992-01-28 |
| PL291777A1 (en) | 1993-03-08 |
| EP0528070A1 (en) | 1993-02-24 |
| NO913662D0 (en) | 1991-09-17 |
| JPH0550178A (en) | 1993-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |