CA2194409A1 - Single-cylinder crusher - Google Patents
Single-cylinder crusherInfo
- Publication number
- CA2194409A1 CA2194409A1 CA002194409A CA2194409A CA2194409A1 CA 2194409 A1 CA2194409 A1 CA 2194409A1 CA 002194409 A CA002194409 A CA 002194409A CA 2194409 A CA2194409 A CA 2194409A CA 2194409 A1 CA2194409 A1 CA 2194409A1
- Authority
- CA
- Canada
- Prior art keywords
- roll
- rocker
- profiling
- ribs
- relative motion
- 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
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/10—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member
- B02C4/12—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a plate
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The proposed crushing device is designed as a single-cylinder crusher and is provided with a rotary-driven cylinder (1) and an associated rocker arm (2). Contours are provided on the opposing surfaces of the cylinder (1) and rocker arm (2); these contours are formed by ridges and are inclined in relation to the direction (arrow 10) of motion of the cylinder (1) relative to the rocker arm (2), so that in addition to the radial component of motion, an axial component is produced which promotes the cubic shape of the crushed product grains.
Description
Sinqle Roll Crusher The invention relates to a single roll crusher for crushing solids with a pivotally mounted, rotary-driven roll and with a rocker assigned to it as crushing tools, at least the roll surface facing the rocker being profiled, the profiling which is formed by ribs and grooves located between them being inclined at least in areas to the direction of relative motion between the roll and rocker.
In known crushing devices problems often arise since the crushed material has a longitudinally extended grain shape which is less well suited in many applications than a roughly cubic shape of the grain, i.e., a grain shape without any especially pronounced longitudinal extension in one direction.
EP 0 563 564 A2 discloses a cylinder crusher. The known cylinder crusher for crushing brittle grinding stock has two grinding cylinders which are pressed against one another with high pressure, which turn in opposite directions, and which each have a cylinder jacket of wear-resistant white cast iron with surface profiling. In order that the cylinders have especially good feed capacity and high wear resistance, profiling in the form of welding beads of surfacing material is applied to the surface of the cylinder jacket.
The object of the invention is to devise a single roll crusher of the initially mentioned type which is suitable especially for fine crushing, and with which predominantly crushed material is obtained with good utilization of energy, material with a grain shape which is roughly cubical and spherical, therefore has no longitudinal extension which is especially pronounced in one direction.
According to the invention this is achieved in that the profiling of the roll and optionally the rocker is formed by bodies of a hard material inserted into them and that the roll consists of several disks located next to one another in the axial direction, each disk having ribs and grooves on its periphery to form the profiling.
With the device according to the invention especially favorable utilization of the energy expended to cause relative motion between the tool surfaces (rocker-roll) and crushing predominantly by cracking, using the low tensile strength of the mineral grains, is achieved and a desired shape with roughly "cubic" configuration is attained.
In the invention the desired effect is attained because due to the specially structured surface at least the roll which is one of the two tools which cause crushing, an interaction originates such that not only motion of the solid grains to be crushed occurs perpendicular to the moving roll, but also a motion component perpendicular to the direction of relative motion is formed. In the single roll crusher according to the invention the motion component is achieved by the structuring (profiling) of the roll, and preferably also structuring of the rocker. This component of motion transverse to the direction in which the roll moves leads to transverse rolling motion of the grain in the crushing space and thus to rounding. In this way the grain shape is improved essentially in the direction of cubicity and thus the disadvantage of the aforementioned known crushing device is avoided.
Preferred and advantageous embodiments of the device according to the invention are the subject matter of the subclaims.
The angles of the profiling to the direction of relative motion between the roll and the rocker can be selected depending on the properties of the material to be crushed and can be established with consideration of the other operating conditions of the single roll crusher. Within the framework of the invention it is preferred that the profiling of the roll and/or that of the rocker is divided into sections with opposite alignment to the direction of relative motion between the roll and rocker. Here it can be provided that the profiling in the different sections encloses identical, but opposite angles with the direction of relative motion between the roll and rocker.
In certain applications an embodiment is suitable in which the profiling in the different sections encloses different and opposite angles with the direction of relative motion between the roll and rocker.
In practice the profiling of the roll and optionally that of the rocker, viewed transversely to the direction of relative motion between the roll and rocker, can run in a zigzag or a serpentine.
All these preferred possible embodiments improve the action of the single roll crusher according to the invention because the crushing of minerals or other solids with a very narrow product grain range is improved, the extremely fine grain percentage is further minimized, and more favorable energy use and improved yield are ensured. It goes without saying that good grain shape of the products is also possible via a multistage arrangement or twin arrangement with low structural height and corresponding throughput.
Other details and features of the invention follow from the following description in which reference is made to the attached drawing in which one embodiment of the invention is schematically shown.
Figure 1 shows a single roll crusher viewed in the axial direction of the roll, Figure 2 shows an overhead view of the roll perpendicu-lar to the axis with the rocker removed (schematic), Figure 3 shows in an overhead view a tool body of the rocker (viewed essentially from the axis of the roll) and Figure 4 schematically shows a section along line IV-IV
in Figure 3.
One crushing device designed especially for fine crushing of minerals (rock) and designed as a single roll crusher 2~94409 consists in the embodiment shown in Figure 1 of rotary-driven roll 1 which is pivotally mounted around axis 3, and rocker 2 which is assigned to the outside periphery of roll 1 and which is mounted to swivel for example by a hydraulic drive in the frame of the crushing device and is solidly or flexibly (elasti-cally) loaded towards roll 1.
On the outside periphery of roll 1 there are ribs distributed over the periphery and between them, grooves. Ribs 5 and grooves 6 can be uniformly distributed on roll 1 (over the periphery).
As is especially apparent from Figure 2, roll 1 is composed of several disks 4, of which each on its outside periphery bears a section of ribs 5 and grooves 6. Figure 2 shows that ribs 5 run in a zig-zag, individual sections 7 and 8 of ribs 5 enclosing angles pointed oppositely with the direction of relative motion between roll 1 and rocker 2 (= direction of rotation of roll 1 relative to rocker 2, arrow 10 in Figure 1).
These angles in the embodiment shown are the same size and in the viewing direction according to Figure 2 enclose angle ~ with axis 3. Ribs 5 and grooves 6 can also run such that they have areas in which they run parallel to the direction of relative motion (arrow 10) between roll 1 and rocker 2. For example, ribs 5 and grooves 6 can also run serpentinely.
Also, tool bodies 11 inserted into rocker 2 on their working surface facing roll 1 carry structuring which is composed 21 9440~
of ribs or cutting edges 13 and grooves 14 located between them.
Here sections 15 and 16 in which ribs 13 and grooves 14 located between them each run parallel to one another are made roughly as wide as disks 4 which comprise roll 1. Ribs 14 can have the same width as sections 7 and 8 of ribs 5 on roll 1 in the direction of axis of rotation 3 of roll 1, i.e., viewed trans-versely to the direction of relative motion (arrow 10) between roll 1 and rocker 2.
In the embodiment shown, ribs 5 and grooves 6 of roll 1 are wider than ribs 13 and grooves 14 on rocker 2.
Ribs 13 and grooves 14 can also be arranged non-uniformly distributed. Ribs 13 and grooves 14 can also run such that they have areas in which they run parallel to the relative motion between roll 1 and rocker 2.
In certain applications bent ribs 5 or 13 are advanta-geous. In certain applications a nonuniform distribution of ribs 5 and grooves 6 on roll 1 and/or ribs 13 and grooves 14 on rocker 2 can yield better results.
Angles ~ enclosed by grooves 14 and ribs 13 on tools 11 with a perpendicular (=parallel to axis of rotation 3) to the direction of relative motion (arrow 10) can be the same as or different from angle ~ (Figure 2).
Ribs 5 and ribs 13 are formed by inserting strips of hard material into disks 4 of roll 1 and into rocker 2 or its tool bodies 11. In doing so it is possible to form different structural elements (therefore ribs 5 and 13 on the one hand and the carrier material on the other) from different materials so that a self-sharpening effect results.
The size of angles ~ and ~ is selected depending on the properties of the material to be crushed. Thus, at a diameter of roll 1 from 300 to 800 mm and a thickness of disks 4 of 50 mm angles ~ of roughly 10 to 40~ are suitable. Angles ~ of ribs 13 on tool bodies 11 of rocker 2 in this case are for example 40 to 80~.
For the case of crushing of limestone, with dimensions otherwise unchanged, angles ~ can be 20~ and angles ~ 70~.
Overall it can be stated that angles ~ on the order of 10 to 40~ are preferred for crushing of rock, in most cases the best results being achieved at 15 to 30~. Angles ~ can be in the range from 40 to 80~, preferably 50 to 70~.
Height H1 of ribs 5 of roll 1 and division T1, height H2 of ribs 13 and division T2/T3 of ribs 13 are selected depending on the material to be crushed and the desired product grain range.
Likewise, flank angles ~1 and ~2 (Figure 1) are determined according to these parameters and can for example have values from -25 to +25~. But flank angles ~1 and ~2 are variable.
~1 94409 Gap "S" between roll 1 and rocker 2 is optionally adjustable since it is also decisive for the attainable product grain range.
In summary, the invention can be described for example as follows: .
A crushing device made as a single roll crusher with rotary-driven roll 1 and rocker 2 assigned to it has profiling on the surfaces of roll 1 and rocker 2 which face one another.
The profiling formed by ribs 5, 13 is sloped to the direction (arrow 10) of relative motion between roll 1 and rocker 2 so that in addition to the radial motion component an axial motion component is formed which promotes cubicity of the grain shape of the crushing products.
In known crushing devices problems often arise since the crushed material has a longitudinally extended grain shape which is less well suited in many applications than a roughly cubic shape of the grain, i.e., a grain shape without any especially pronounced longitudinal extension in one direction.
EP 0 563 564 A2 discloses a cylinder crusher. The known cylinder crusher for crushing brittle grinding stock has two grinding cylinders which are pressed against one another with high pressure, which turn in opposite directions, and which each have a cylinder jacket of wear-resistant white cast iron with surface profiling. In order that the cylinders have especially good feed capacity and high wear resistance, profiling in the form of welding beads of surfacing material is applied to the surface of the cylinder jacket.
The object of the invention is to devise a single roll crusher of the initially mentioned type which is suitable especially for fine crushing, and with which predominantly crushed material is obtained with good utilization of energy, material with a grain shape which is roughly cubical and spherical, therefore has no longitudinal extension which is especially pronounced in one direction.
According to the invention this is achieved in that the profiling of the roll and optionally the rocker is formed by bodies of a hard material inserted into them and that the roll consists of several disks located next to one another in the axial direction, each disk having ribs and grooves on its periphery to form the profiling.
With the device according to the invention especially favorable utilization of the energy expended to cause relative motion between the tool surfaces (rocker-roll) and crushing predominantly by cracking, using the low tensile strength of the mineral grains, is achieved and a desired shape with roughly "cubic" configuration is attained.
In the invention the desired effect is attained because due to the specially structured surface at least the roll which is one of the two tools which cause crushing, an interaction originates such that not only motion of the solid grains to be crushed occurs perpendicular to the moving roll, but also a motion component perpendicular to the direction of relative motion is formed. In the single roll crusher according to the invention the motion component is achieved by the structuring (profiling) of the roll, and preferably also structuring of the rocker. This component of motion transverse to the direction in which the roll moves leads to transverse rolling motion of the grain in the crushing space and thus to rounding. In this way the grain shape is improved essentially in the direction of cubicity and thus the disadvantage of the aforementioned known crushing device is avoided.
Preferred and advantageous embodiments of the device according to the invention are the subject matter of the subclaims.
The angles of the profiling to the direction of relative motion between the roll and the rocker can be selected depending on the properties of the material to be crushed and can be established with consideration of the other operating conditions of the single roll crusher. Within the framework of the invention it is preferred that the profiling of the roll and/or that of the rocker is divided into sections with opposite alignment to the direction of relative motion between the roll and rocker. Here it can be provided that the profiling in the different sections encloses identical, but opposite angles with the direction of relative motion between the roll and rocker.
In certain applications an embodiment is suitable in which the profiling in the different sections encloses different and opposite angles with the direction of relative motion between the roll and rocker.
In practice the profiling of the roll and optionally that of the rocker, viewed transversely to the direction of relative motion between the roll and rocker, can run in a zigzag or a serpentine.
All these preferred possible embodiments improve the action of the single roll crusher according to the invention because the crushing of minerals or other solids with a very narrow product grain range is improved, the extremely fine grain percentage is further minimized, and more favorable energy use and improved yield are ensured. It goes without saying that good grain shape of the products is also possible via a multistage arrangement or twin arrangement with low structural height and corresponding throughput.
Other details and features of the invention follow from the following description in which reference is made to the attached drawing in which one embodiment of the invention is schematically shown.
Figure 1 shows a single roll crusher viewed in the axial direction of the roll, Figure 2 shows an overhead view of the roll perpendicu-lar to the axis with the rocker removed (schematic), Figure 3 shows in an overhead view a tool body of the rocker (viewed essentially from the axis of the roll) and Figure 4 schematically shows a section along line IV-IV
in Figure 3.
One crushing device designed especially for fine crushing of minerals (rock) and designed as a single roll crusher 2~94409 consists in the embodiment shown in Figure 1 of rotary-driven roll 1 which is pivotally mounted around axis 3, and rocker 2 which is assigned to the outside periphery of roll 1 and which is mounted to swivel for example by a hydraulic drive in the frame of the crushing device and is solidly or flexibly (elasti-cally) loaded towards roll 1.
On the outside periphery of roll 1 there are ribs distributed over the periphery and between them, grooves. Ribs 5 and grooves 6 can be uniformly distributed on roll 1 (over the periphery).
As is especially apparent from Figure 2, roll 1 is composed of several disks 4, of which each on its outside periphery bears a section of ribs 5 and grooves 6. Figure 2 shows that ribs 5 run in a zig-zag, individual sections 7 and 8 of ribs 5 enclosing angles pointed oppositely with the direction of relative motion between roll 1 and rocker 2 (= direction of rotation of roll 1 relative to rocker 2, arrow 10 in Figure 1).
These angles in the embodiment shown are the same size and in the viewing direction according to Figure 2 enclose angle ~ with axis 3. Ribs 5 and grooves 6 can also run such that they have areas in which they run parallel to the direction of relative motion (arrow 10) between roll 1 and rocker 2. For example, ribs 5 and grooves 6 can also run serpentinely.
Also, tool bodies 11 inserted into rocker 2 on their working surface facing roll 1 carry structuring which is composed 21 9440~
of ribs or cutting edges 13 and grooves 14 located between them.
Here sections 15 and 16 in which ribs 13 and grooves 14 located between them each run parallel to one another are made roughly as wide as disks 4 which comprise roll 1. Ribs 14 can have the same width as sections 7 and 8 of ribs 5 on roll 1 in the direction of axis of rotation 3 of roll 1, i.e., viewed trans-versely to the direction of relative motion (arrow 10) between roll 1 and rocker 2.
In the embodiment shown, ribs 5 and grooves 6 of roll 1 are wider than ribs 13 and grooves 14 on rocker 2.
Ribs 13 and grooves 14 can also be arranged non-uniformly distributed. Ribs 13 and grooves 14 can also run such that they have areas in which they run parallel to the relative motion between roll 1 and rocker 2.
In certain applications bent ribs 5 or 13 are advanta-geous. In certain applications a nonuniform distribution of ribs 5 and grooves 6 on roll 1 and/or ribs 13 and grooves 14 on rocker 2 can yield better results.
Angles ~ enclosed by grooves 14 and ribs 13 on tools 11 with a perpendicular (=parallel to axis of rotation 3) to the direction of relative motion (arrow 10) can be the same as or different from angle ~ (Figure 2).
Ribs 5 and ribs 13 are formed by inserting strips of hard material into disks 4 of roll 1 and into rocker 2 or its tool bodies 11. In doing so it is possible to form different structural elements (therefore ribs 5 and 13 on the one hand and the carrier material on the other) from different materials so that a self-sharpening effect results.
The size of angles ~ and ~ is selected depending on the properties of the material to be crushed. Thus, at a diameter of roll 1 from 300 to 800 mm and a thickness of disks 4 of 50 mm angles ~ of roughly 10 to 40~ are suitable. Angles ~ of ribs 13 on tool bodies 11 of rocker 2 in this case are for example 40 to 80~.
For the case of crushing of limestone, with dimensions otherwise unchanged, angles ~ can be 20~ and angles ~ 70~.
Overall it can be stated that angles ~ on the order of 10 to 40~ are preferred for crushing of rock, in most cases the best results being achieved at 15 to 30~. Angles ~ can be in the range from 40 to 80~, preferably 50 to 70~.
Height H1 of ribs 5 of roll 1 and division T1, height H2 of ribs 13 and division T2/T3 of ribs 13 are selected depending on the material to be crushed and the desired product grain range.
Likewise, flank angles ~1 and ~2 (Figure 1) are determined according to these parameters and can for example have values from -25 to +25~. But flank angles ~1 and ~2 are variable.
~1 94409 Gap "S" between roll 1 and rocker 2 is optionally adjustable since it is also decisive for the attainable product grain range.
In summary, the invention can be described for example as follows: .
A crushing device made as a single roll crusher with rotary-driven roll 1 and rocker 2 assigned to it has profiling on the surfaces of roll 1 and rocker 2 which face one another.
The profiling formed by ribs 5, 13 is sloped to the direction (arrow 10) of relative motion between roll 1 and rocker 2 so that in addition to the radial motion component an axial motion component is formed which promotes cubicity of the grain shape of the crushing products.
Claims (5)
1. Single roll crusher for crushing solids with pivotally mounted, rotary-driven roll (1) and with rocker (2) assigned to it as crushing tools, at least the surface of roll (1) facing rocker (2) being profiled, the profiling which is formed by ribs (5) and grooves (6) located between them being inclined at least in areas to the direction (arrow 10) of relative motion between roll (1) and rocker (2), wherein the profiling of roll (1) and optionally rocker (2) is formed by bodies (11) of a hard material inserted into them and that roll (1) consists of several disks (4) located next to one another in the axial direction, each disk (4) having ribs (5) and grooves (6) on its periphery to form the profiling.
2. Device according to claim 1, wherein the profiling of roll (1) and/or that of rocker (2) is divided into sections (7, 8; 15, 16) with opposite alignment to the direction (arrow 10) of relative motion between roll (1) and rocker (2).
3. Device according to claim 2, wherein the profiling in different sections (7, 8; 15, 16) encloses identical, but opposite angles with the direction (arrow 10) of relative motion between roll (1) and rocker (2).
4. Device according to claim 2, wherein the profiling in different sections (7, 8; 15, 16) encloses different and opposite angles with the direction (arrow 10) of relative motion between roll (1) and rocker (2).
5. Device according to one of claims 1 through 4, wherein the profiling, viewed transversely to the direction of relative motion (arrow 10) between roll (1) and rocker (2), can run in a zigzag or a serpentine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1339/94 | 1994-07-06 | ||
| AT0133994A AT400817B (en) | 1994-07-06 | 1994-07-06 | ROLLER CRUSHERS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2194409A1 true CA2194409A1 (en) | 1996-01-18 |
Family
ID=3511762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002194409A Abandoned CA2194409A1 (en) | 1994-07-06 | 1995-07-04 | Single-cylinder crusher |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0766601B1 (en) |
| AT (1) | AT400817B (en) |
| AU (1) | AU2779495A (en) |
| CA (1) | CA2194409A1 (en) |
| CZ (1) | CZ291425B6 (en) |
| DE (1) | DE59503860D1 (en) |
| ES (1) | ES2125021T3 (en) |
| FI (1) | FI970025A (en) |
| HU (1) | HU214897B (en) |
| NO (1) | NO970006L (en) |
| PL (1) | PL177698B1 (en) |
| SI (1) | SI9520082A (en) |
| WO (1) | WO1996001147A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006018375A1 (en) * | 2006-04-20 | 2007-10-25 | Rieter Automatik Gmbh | Knife roller for granulating plastic strands |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1427585A (en) * | 1973-04-18 | 1976-03-10 | Hally W W | Mobile stone crushing machine |
| GB2092473B (en) * | 1980-01-09 | 1983-11-02 | Tatabanyai Szenbanyak | Apparatus for the recovery of protein from green vegetable matter |
| DE3336827A1 (en) * | 1983-10-10 | 1985-04-25 | Claudius Peters Ag, 2000 Hamburg | CRUSHING ROLLER FOR ROLLER CRUSHERS |
| DE3345754A1 (en) * | 1983-12-17 | 1985-06-20 | Hazemag Dr. E. Andreas GmbH & Co, 4400 Münster | Crusher roller |
| DE4210395A1 (en) * | 1992-03-30 | 1993-10-07 | Krupp Polysius Ag | Roller mill |
-
1994
- 1994-07-06 AT AT0133994A patent/AT400817B/en not_active IP Right Cessation
-
1995
- 1995-07-04 EP EP95923117A patent/EP0766601B1/en not_active Expired - Lifetime
- 1995-07-04 CA CA002194409A patent/CA2194409A1/en not_active Abandoned
- 1995-07-04 SI SI9520082A patent/SI9520082A/en not_active IP Right Cessation
- 1995-07-04 DE DE59503860T patent/DE59503860D1/en not_active Expired - Fee Related
- 1995-07-04 AU AU27794/95A patent/AU2779495A/en not_active Abandoned
- 1995-07-04 ES ES95923117T patent/ES2125021T3/en not_active Expired - Lifetime
- 1995-07-04 HU HU9700008A patent/HU214897B/en not_active IP Right Cessation
- 1995-07-04 WO PCT/AT1995/000143 patent/WO1996001147A1/en active IP Right Grant
- 1995-07-04 PL PL95318042A patent/PL177698B1/en not_active IP Right Cessation
- 1995-07-04 CZ CZ199730A patent/CZ291425B6/en not_active IP Right Cessation
-
1997
- 1997-01-02 NO NO970006A patent/NO970006L/en not_active Application Discontinuation
- 1997-01-03 FI FI970025A patent/FI970025A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0766601A1 (en) | 1997-04-09 |
| HUT76184A (en) | 1997-07-28 |
| ATA133994A (en) | 1995-08-15 |
| NO970006L (en) | 1997-02-25 |
| WO1996001147A1 (en) | 1996-01-18 |
| ES2125021T3 (en) | 1999-02-16 |
| HU9700008D0 (en) | 1997-02-28 |
| AU2779495A (en) | 1996-01-25 |
| AT400817B (en) | 1996-03-25 |
| CZ291425B6 (en) | 2003-03-12 |
| PL177698B1 (en) | 2000-01-31 |
| FI970025A (en) | 1997-01-29 |
| FI970025A0 (en) | 1997-01-03 |
| HU214897B (en) | 1998-07-28 |
| EP0766601B1 (en) | 1998-10-07 |
| DE59503860D1 (en) | 1998-11-12 |
| CZ3097A3 (en) | 1997-11-12 |
| SI9520082A (en) | 1997-08-31 |
| PL318042A1 (en) | 1997-05-12 |
| NO970006D0 (en) | 1997-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |