CA1066199A - Rotary pelletizing vacuum filter - Google Patents
Rotary pelletizing vacuum filterInfo
- Publication number
- CA1066199A CA1066199A CA231,249A CA231249A CA1066199A CA 1066199 A CA1066199 A CA 1066199A CA 231249 A CA231249 A CA 231249A CA 1066199 A CA1066199 A CA 1066199A
- Authority
- CA
- Canada
- Prior art keywords
- drum
- belt
- filter
- deflecting roller
- lattice
- 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.)
- Expired
Links
- 238000005453 pelletization Methods 0.000 title 1
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000008188 pellet Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000012065 filter cake Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 30
- 229910052742 iron Inorganic materials 0.000 abstract description 15
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 150000002505 iron Chemical class 0.000 abstract description 2
- 238000010009 beating Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010310 metallurgical process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
- B01D33/09—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration with surface cells independently connected to pressure distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Sludge (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An improved rotary vacuum filter for producing filtration blanks or what may be termed pellets from slurries, especially for example, iron ore slurries. Known rotary filters utilize spiked deflecting rollers to remove iron ore agglomerates from interstices in a lattice-like belt. The use of a spiked deflecting roller necessitates the use of a metal belt which is difficult to produce since the belt must be sufficiently flexible to both pass around the deflecting roller and lie sealingly against the surface of a vacuum drum without permitting entry of outside air. This problem is over-come by the present invention which provides a vacuum filter whereby dehydrated iron ore agglomerates are easily released undamaged from the belt without impairing the suction effect produced by the drum. The rotary vacuum filter according to the present invention comprises a filter drum adapted to rotate about a horizontal axis while partly immersed in a filter trough filled with slurry, the filter drum is provided with a filter lining and a suction area, a forming belt, divided like a lattice, lies against the filter lining over the entire suction area of the drum and is adapted to rotate therewith, the forming belt extends from the drum over a deflecting roller arranged at a distance from the drum, the deflecting roller having a diameter smaller than a diameter of the drum, the belt adapted to be lifted off the said drum at an end of the suction area by means of the deflecting roller and being returned thereto before being immersed in the filter trough, the lattice forming belt having walls made of resiliently flexible material, interstices in the lattice for holding filtration blanks, said interstices being tapered conically towards a surface of the belt lying against the filter drum whereby filtration blanks are removed from the interstices by squeezing action as the belt passes around the deflecting roller.
An improved rotary vacuum filter for producing filtration blanks or what may be termed pellets from slurries, especially for example, iron ore slurries. Known rotary filters utilize spiked deflecting rollers to remove iron ore agglomerates from interstices in a lattice-like belt. The use of a spiked deflecting roller necessitates the use of a metal belt which is difficult to produce since the belt must be sufficiently flexible to both pass around the deflecting roller and lie sealingly against the surface of a vacuum drum without permitting entry of outside air. This problem is over-come by the present invention which provides a vacuum filter whereby dehydrated iron ore agglomerates are easily released undamaged from the belt without impairing the suction effect produced by the drum. The rotary vacuum filter according to the present invention comprises a filter drum adapted to rotate about a horizontal axis while partly immersed in a filter trough filled with slurry, the filter drum is provided with a filter lining and a suction area, a forming belt, divided like a lattice, lies against the filter lining over the entire suction area of the drum and is adapted to rotate therewith, the forming belt extends from the drum over a deflecting roller arranged at a distance from the drum, the deflecting roller having a diameter smaller than a diameter of the drum, the belt adapted to be lifted off the said drum at an end of the suction area by means of the deflecting roller and being returned thereto before being immersed in the filter trough, the lattice forming belt having walls made of resiliently flexible material, interstices in the lattice for holding filtration blanks, said interstices being tapered conically towards a surface of the belt lying against the filter drum whereby filtration blanks are removed from the interstices by squeezing action as the belt passes around the deflecting roller.
Description
The invention relates to a rotary vacuum filter for producing filtration blanks or what may be termed pellets from slurries, especially , for example, iron ore slurries.
Many iron ores must be subjected to wet mechanical dressing in order to enrich them by removal of the gangue. The slurry thus produced must then be dehydrated and converted to a grain size suitable fo~ ~he subsequent metallurgical process.
German Patent 1 920 219 and German Patent of Addition 1 925 876 discloses a method in which the two operations of dehydrating and moulding are combined with one another.
Dehydrating of the slurry is preferably carried out in so-called rotary vacuum filters comprising a filter drum rotating about a horizontal axis, the lower part of the said drum being immersed in a filter trough filled with the slurry. The filter drum is provided with a filter lining permeable to water.
A negative pressure produced in the interior of the drum causes the s-lurry to be deposited by suction in a layer on the submerged surface of the drum. This deposit is then removed from the trough by the continuously rotating drum. The rotation of the drum removes still more water from the layer of sludge. The dehydrated ore cake is removed from the surface of the drum by appropriate means before the surface of the drum is again immersed in the iron ore slurry.
Division of the dehydrated filter cake is achieved by arranging a lattice-like belt on the surface of the drum, the interstices of the belt being such as to produce, during the dehydrating process, agglomerates of iron in the form of cubes, or the like. The lattice-like forming belt which rotates with the filter drum, is so arranged that it is lifted from the drum at the end of the suction area by means of a deflecting roller located at a distance from the drum, the forming belt being ~k - 1 - ~p 'I
1~)66~99 returned to the drum before again being immersed in the filter trough.
The surface of the deflecting roller is provided with spikes to expel the iron ore agglomerates from the interstices in the belt. As a result, the spikes must be very accurately matched with the interstices. The use of the spiked roller has necessitated the use of a metal forming belt. However, it is extremely difficult to produce a lattice belt made of metal since the belt must be flexible in order to pass around the spiked roller. Further, a high degree of accuracy is required in order to ensure that the spikes enter the interstices. Another problem is to ensure that the lattice belt lies sealingly against the surface of the drum so that no outside air is drawn into the drum.
The present invention proposes to improve this known vacuum filter so that the dehydrated iron ore agglomerates are easily released undamaged from the lattice belt without impair-ing the suction effect produced within the drum. This is achieved by providing a belt having walls made of resiliently flexible material, the belt having interstices therein which are tapered conically towards the surface of the belt which lies against the filter drum. As a result, the lattice belt lies sealingly against the filter drum over the entire suction area.
Furthermore, since the diameter of the deflecting roller is con-siderably smaller than that of the drum, the said belt is bent so sharply around the deflecting roller that most of the pieces of iron ore are released by the squeezing action and easily fall out of the interstices. The conical design of the inter-stices, which are open at the bottom, prevents the iron ore agglomerates therein from adhering to the filter lining when the belt is lifted from the drum, as well as from falling out on the way to the deflecting roller.
In accordance with a broad aspect of the invention there is provided an apparatus for filtering slurries and for the manufacture of pellets from filter ca~es, said apparatu~
comprising: a filter drum adapted to rotate about its axis while partly immersed in the slurries, the filter drum being provided with a filter lining and a suction area and an endless forming belt, divided like a lattice which lies against the filter lining over the entire suction area of the drum and which is adapted to rotate therewith, the forming belt extends from the drum over a deflecting roller arranged at a distance from the drum whereby the pellets which are separated from the filter cakes are removed from the interstices in the lattice, characterized by the fact that the lattice forming belt has walls made of resiliently flexible material, and that said interstices are tapered conically toward a surface of the belt lying against the filter drum.
In one preferred embodiment of the invention, an additional deflecting roller is arranged in the return path of the belt just above the point of immersion, such that the belt runs approximately horizontally between the two deflecting rollers. The advantage of this is that the belt approaches the surface of the drum at a steeper angle, thus enlarging the suc-tion area.
In case any pieces of iron ore fail to drop out of the interstices when the lattice belt passes around the deflect-ing roller, according to a further embodiment of the invention an auxiliary device for shaking, beating, or blowing such pieces out of the said belt is arranged immediately above the return run of the belt. This auxiliary device may be a blower, or a beating or vibrating device.
The invention will now be described with reference to ~066199 the accompanying drawings which illustrate one embodiment of the present invention.
Figure 1 i~ a ~ide elevation of a diagrammatic re-presentation of the drum filter according to the invention, Figure 2 is an enlarged vertical section of the lattic~
forming belt of Figure 1, taken along the ! line II-II, and Figure 3 is a plan view of the enlarged section of the belt of Figure 2.
' m e drum filter illustrated in Figure 1 consists of a filter drum 1 which rotates about a horizontal axis, the lower part of the said drum being immersed in a filter trough 2 filled with iron ore slurry. This slurry is produced by wet mechanical dressing and is fed continuously from a mixing container 3, 1~66~99 through a feed means 4, into trough 2. The slurry is fed into trough 2 at such a rate that the depth of immersion of the filter drum therein remains constant.
Filter drum 1 is provided with a filter lining 5 which is permeable to water. The slurry in filter trough 2 is drawn through the filter lining 5 by means of a vacuum device arranged within the interior of the drum. As filter drum 1 continues to rotate, the slurry is brought to the desired degree of dryness.
The vacuum device is well known in the art and consists of suction cells 6 arranged closely below filter lining 5, the cells 6 being connected by means of suction lines 7 to a control disc 8 located on the axis of the drum. The control disc 8 rotates against a control head, not shown, which is connected to a suction pump, also not shown. The design of the control head is such that suction is applied only to suction lines 7 in rotational area ~ of the drum. None of the remaining suction lines is connected to the pump.
Arranged on filter lining 5 is a lattice-like divided forming belt 9, the interstices in the belt 9 being tapered conically towards the suction side thereof, that is, towards the side of the belt which lies against the filter drum, as best seen in Figures 2 and 3. The belt 9 is made of a resiliently flexible material and is lifted from filter drum 1 at the end of the suction area by means of a deflecting roller 10 arranged at a distance from filter drum 1. The belt 9 is returned to the drum 1 before being immersed in filter trough 2. The conicity (a-b):c of the interstices tapering towards the suction side of the belt is of the order of 1:10. Although a part of the effective surface area of the filter lining 5 is lost due to the thickening of belt webs 14 towards the suction side of the belt, this loss is compensated for by the fact that the thickness of ~066199 the layer of sludge deposi.ted on drum 1 may be considerably greater than if the sludge were deposited by suction without the use of a lattice belt.
Arranged in the return run of the belt, just above the point of immersion, is an additional deflecting roller 11, by means of which lattice belt 9 is caused to travel approximately horizontally towards drum 1. Also, located beneath deflecting roller 10 is a conveyor belt 12 for carrying away the pieces of iron ore 15 released from lattice belt 9. Most of these pieces are released from the interstices due to the resulting squeezing action as the belt passes around deflecting roller 10 and fall onto conveyor belt 12.
In order to re'ease any iron ore agglomerates 15 remaining in lattice belt 9, as well as to ensure that all of the interstices in the belt are ready to receive the new slurry, it is desirable to arrange between the two deflecting rollers 10, 11 and just above the belt 9, an auxiliary device 13, whlch may be in the form of a blowing, a beating, or a vibrating device.
Any pieces of iron ore thus released also drop onto conveyor belt 12.
If conveyor belt 12 is suitably designed, iron ore blanks lS may be simultaneously burned or sintered in order to provide them with the strength required for the subsequent -metallurgical process.
Many iron ores must be subjected to wet mechanical dressing in order to enrich them by removal of the gangue. The slurry thus produced must then be dehydrated and converted to a grain size suitable fo~ ~he subsequent metallurgical process.
German Patent 1 920 219 and German Patent of Addition 1 925 876 discloses a method in which the two operations of dehydrating and moulding are combined with one another.
Dehydrating of the slurry is preferably carried out in so-called rotary vacuum filters comprising a filter drum rotating about a horizontal axis, the lower part of the said drum being immersed in a filter trough filled with the slurry. The filter drum is provided with a filter lining permeable to water.
A negative pressure produced in the interior of the drum causes the s-lurry to be deposited by suction in a layer on the submerged surface of the drum. This deposit is then removed from the trough by the continuously rotating drum. The rotation of the drum removes still more water from the layer of sludge. The dehydrated ore cake is removed from the surface of the drum by appropriate means before the surface of the drum is again immersed in the iron ore slurry.
Division of the dehydrated filter cake is achieved by arranging a lattice-like belt on the surface of the drum, the interstices of the belt being such as to produce, during the dehydrating process, agglomerates of iron in the form of cubes, or the like. The lattice-like forming belt which rotates with the filter drum, is so arranged that it is lifted from the drum at the end of the suction area by means of a deflecting roller located at a distance from the drum, the forming belt being ~k - 1 - ~p 'I
1~)66~99 returned to the drum before again being immersed in the filter trough.
The surface of the deflecting roller is provided with spikes to expel the iron ore agglomerates from the interstices in the belt. As a result, the spikes must be very accurately matched with the interstices. The use of the spiked roller has necessitated the use of a metal forming belt. However, it is extremely difficult to produce a lattice belt made of metal since the belt must be flexible in order to pass around the spiked roller. Further, a high degree of accuracy is required in order to ensure that the spikes enter the interstices. Another problem is to ensure that the lattice belt lies sealingly against the surface of the drum so that no outside air is drawn into the drum.
The present invention proposes to improve this known vacuum filter so that the dehydrated iron ore agglomerates are easily released undamaged from the lattice belt without impair-ing the suction effect produced within the drum. This is achieved by providing a belt having walls made of resiliently flexible material, the belt having interstices therein which are tapered conically towards the surface of the belt which lies against the filter drum. As a result, the lattice belt lies sealingly against the filter drum over the entire suction area.
Furthermore, since the diameter of the deflecting roller is con-siderably smaller than that of the drum, the said belt is bent so sharply around the deflecting roller that most of the pieces of iron ore are released by the squeezing action and easily fall out of the interstices. The conical design of the inter-stices, which are open at the bottom, prevents the iron ore agglomerates therein from adhering to the filter lining when the belt is lifted from the drum, as well as from falling out on the way to the deflecting roller.
In accordance with a broad aspect of the invention there is provided an apparatus for filtering slurries and for the manufacture of pellets from filter ca~es, said apparatu~
comprising: a filter drum adapted to rotate about its axis while partly immersed in the slurries, the filter drum being provided with a filter lining and a suction area and an endless forming belt, divided like a lattice which lies against the filter lining over the entire suction area of the drum and which is adapted to rotate therewith, the forming belt extends from the drum over a deflecting roller arranged at a distance from the drum whereby the pellets which are separated from the filter cakes are removed from the interstices in the lattice, characterized by the fact that the lattice forming belt has walls made of resiliently flexible material, and that said interstices are tapered conically toward a surface of the belt lying against the filter drum.
In one preferred embodiment of the invention, an additional deflecting roller is arranged in the return path of the belt just above the point of immersion, such that the belt runs approximately horizontally between the two deflecting rollers. The advantage of this is that the belt approaches the surface of the drum at a steeper angle, thus enlarging the suc-tion area.
In case any pieces of iron ore fail to drop out of the interstices when the lattice belt passes around the deflect-ing roller, according to a further embodiment of the invention an auxiliary device for shaking, beating, or blowing such pieces out of the said belt is arranged immediately above the return run of the belt. This auxiliary device may be a blower, or a beating or vibrating device.
The invention will now be described with reference to ~066199 the accompanying drawings which illustrate one embodiment of the present invention.
Figure 1 i~ a ~ide elevation of a diagrammatic re-presentation of the drum filter according to the invention, Figure 2 is an enlarged vertical section of the lattic~
forming belt of Figure 1, taken along the ! line II-II, and Figure 3 is a plan view of the enlarged section of the belt of Figure 2.
' m e drum filter illustrated in Figure 1 consists of a filter drum 1 which rotates about a horizontal axis, the lower part of the said drum being immersed in a filter trough 2 filled with iron ore slurry. This slurry is produced by wet mechanical dressing and is fed continuously from a mixing container 3, 1~66~99 through a feed means 4, into trough 2. The slurry is fed into trough 2 at such a rate that the depth of immersion of the filter drum therein remains constant.
Filter drum 1 is provided with a filter lining 5 which is permeable to water. The slurry in filter trough 2 is drawn through the filter lining 5 by means of a vacuum device arranged within the interior of the drum. As filter drum 1 continues to rotate, the slurry is brought to the desired degree of dryness.
The vacuum device is well known in the art and consists of suction cells 6 arranged closely below filter lining 5, the cells 6 being connected by means of suction lines 7 to a control disc 8 located on the axis of the drum. The control disc 8 rotates against a control head, not shown, which is connected to a suction pump, also not shown. The design of the control head is such that suction is applied only to suction lines 7 in rotational area ~ of the drum. None of the remaining suction lines is connected to the pump.
Arranged on filter lining 5 is a lattice-like divided forming belt 9, the interstices in the belt 9 being tapered conically towards the suction side thereof, that is, towards the side of the belt which lies against the filter drum, as best seen in Figures 2 and 3. The belt 9 is made of a resiliently flexible material and is lifted from filter drum 1 at the end of the suction area by means of a deflecting roller 10 arranged at a distance from filter drum 1. The belt 9 is returned to the drum 1 before being immersed in filter trough 2. The conicity (a-b):c of the interstices tapering towards the suction side of the belt is of the order of 1:10. Although a part of the effective surface area of the filter lining 5 is lost due to the thickening of belt webs 14 towards the suction side of the belt, this loss is compensated for by the fact that the thickness of ~066199 the layer of sludge deposi.ted on drum 1 may be considerably greater than if the sludge were deposited by suction without the use of a lattice belt.
Arranged in the return run of the belt, just above the point of immersion, is an additional deflecting roller 11, by means of which lattice belt 9 is caused to travel approximately horizontally towards drum 1. Also, located beneath deflecting roller 10 is a conveyor belt 12 for carrying away the pieces of iron ore 15 released from lattice belt 9. Most of these pieces are released from the interstices due to the resulting squeezing action as the belt passes around deflecting roller 10 and fall onto conveyor belt 12.
In order to re'ease any iron ore agglomerates 15 remaining in lattice belt 9, as well as to ensure that all of the interstices in the belt are ready to receive the new slurry, it is desirable to arrange between the two deflecting rollers 10, 11 and just above the belt 9, an auxiliary device 13, whlch may be in the form of a blowing, a beating, or a vibrating device.
Any pieces of iron ore thus released also drop onto conveyor belt 12.
If conveyor belt 12 is suitably designed, iron ore blanks lS may be simultaneously burned or sintered in order to provide them with the strength required for the subsequent -metallurgical process.
Claims (4)
1. Apparatus for filtering slurries and for the manufac-ture of pellets from filter cakes, said apparatus comprising:
a filter drum adapted to rotate about its axis while partly immersed in the slurries, the filter drum being provided with a filter lining and a suction area and an endless forming belt, divided like a lattice which lies against the filter lining over the entire suction area of the drum and which is adapted to rotate therewith, the forming belt extends from the drum over a deflecting roller arranged at a distance from the drum whereby the pellets which are separated from the filter cakes are removed from the interstices in the lattice, charac-terized by the fact that the lattice forming belt has walls made of resiliently flexible material, and that said interstices are tapered conically toward a surface of the belt lying against the filter drum.
a filter drum adapted to rotate about its axis while partly immersed in the slurries, the filter drum being provided with a filter lining and a suction area and an endless forming belt, divided like a lattice which lies against the filter lining over the entire suction area of the drum and which is adapted to rotate therewith, the forming belt extends from the drum over a deflecting roller arranged at a distance from the drum whereby the pellets which are separated from the filter cakes are removed from the interstices in the lattice, charac-terized by the fact that the lattice forming belt has walls made of resiliently flexible material, and that said interstices are tapered conically toward a surface of the belt lying against the filter drum.
2. A rotary vacuum filter according to claim 1, wherein the taper of the interstices in the lattice amounts approximate-ly 1:10.
3. A rotary vacuum filter according to claims 1 or 2, wherein an additional deflecting roller is located in a return path of the belt from the deflecting roller to the drum, the location of the additional deflecting roller being such that the lattice forming belt extends substantially horizontally between the two deflecting rollers.
4. A rotary vacuum filter according to claims 1 or 2, wherein an auxiliary device is arranged adjacent and above a return run of the forming belt from the deflecting roller to the drum, the auxialiary device adapted to remove filtration pellets remaining in the interstices after the belt has passed around the deflecting roller.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2437991A DE2437991C3 (en) | 1974-08-07 | 1974-08-07 | Device for filtering sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1066199A true CA1066199A (en) | 1979-11-13 |
Family
ID=5922647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA231,249A Expired CA1066199A (en) | 1974-08-07 | 1975-07-10 | Rotary pelletizing vacuum filter |
Country Status (9)
| Country | Link |
|---|---|
| AU (1) | AU496922B2 (en) |
| BR (1) | BR7505012A (en) |
| CA (1) | CA1066199A (en) |
| DE (1) | DE2437991C3 (en) |
| FR (1) | FR2281430A1 (en) |
| GB (1) | GB1505698A (en) |
| NL (1) | NL7508273A (en) |
| NO (1) | NO140368C (en) |
| SE (1) | SE401788B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2651098C2 (en) * | 1976-11-09 | 1982-12-02 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Device for filtering sludge and for producing shaped bodies |
| DE2752858C2 (en) * | 1977-11-26 | 1986-02-20 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Method and device for removing moldings from the lattice-like recesses of a molding belt |
| CN115444159B (en) * | 2022-08-19 | 2023-06-13 | 广东中烟工业有限责任公司 | Double-layer drum-type efficient directional screening device for tobacco flakes |
-
1974
- 1974-08-07 DE DE2437991A patent/DE2437991C3/en not_active Expired
-
1975
- 1975-07-04 AU AU82754/75A patent/AU496922B2/en not_active Expired
- 1975-07-10 CA CA231,249A patent/CA1066199A/en not_active Expired
- 1975-07-10 NL NL7508273A patent/NL7508273A/en not_active Application Discontinuation
- 1975-07-30 FR FR7523754A patent/FR2281430A1/en active Granted
- 1975-08-04 SE SE7508792A patent/SE401788B/en unknown
- 1975-08-05 NO NO75752751A patent/NO140368C/en unknown
- 1975-08-06 BR BR7505012*A patent/BR7505012A/en unknown
- 1975-08-06 GB GB32904/75A patent/GB1505698A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2437991C3 (en) | 1978-06-08 |
| FR2281430A1 (en) | 1976-03-05 |
| BR7505012A (en) | 1976-08-03 |
| SE401788B (en) | 1978-05-29 |
| NO140368C (en) | 1979-08-22 |
| SE7508792L (en) | 1976-02-09 |
| AU496922B2 (en) | 1978-11-09 |
| NO140368B (en) | 1979-05-14 |
| DE2437991B2 (en) | 1977-10-20 |
| NO752751L (en) | 1976-02-10 |
| FR2281430B1 (en) | 1980-04-18 |
| NL7508273A (en) | 1976-02-10 |
| AU8275475A (en) | 1977-01-06 |
| GB1505698A (en) | 1978-03-30 |
| DE2437991A1 (en) | 1976-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4204855A (en) | Apparatus for dewatering granulated-slag slurry | |
| EP0251787B1 (en) | Apparatus for thickening pulp and paper stock | |
| US3459122A (en) | Apparatus for the continuous extraction of moisture from suspended matter | |
| US4661243A (en) | Method and apparatus for treating moist dust and mud in the steel industry | |
| US3200949A (en) | Sludge flocculating and filtering apparatus | |
| US4692240A (en) | Apparatus and a method for separating one solid component from another solid component in suspension in a liquid | |
| US3774760A (en) | Sludge dewatering apparatus and process | |
| US2982411A (en) | Moisture separation from granular materials | |
| CA1066199A (en) | Rotary pelletizing vacuum filter | |
| US4713181A (en) | Method and apparatus for handling sludge | |
| US4136031A (en) | Apparatus for the recovery of liquid from a liquid medium containing solids | |
| US3984287A (en) | Apparatus for separating organic material from particulate tar sands and coal and agglomeration of the particulate residue | |
| US3244281A (en) | Process for separating solids from suspensions | |
| US4419249A (en) | Method and apparatus for dewatering a slurry of fine particles | |
| US3531872A (en) | Process and apparatus for deliquifying fluent material | |
| US1885334A (en) | Process and equipment for forming sheets | |
| US3438503A (en) | Rotary vacuum filter | |
| US3469703A (en) | Method and apparatus for regenerating the filter cloth of a rotary filter table | |
| RU98121004A (en) | WET CRUSHING METHOD AND DEVICE FOR ITS IMPLEMENTATION | |
| US4196078A (en) | Process and apparatus for dewatering granulated material, especially granulated blast furnace slag | |
| US2481110A (en) | Dewatering process | |
| US2330542A (en) | Dewatering of suspended solids | |
| US3782555A (en) | Feed distribution means for vacuum filters | |
| US1201014A (en) | Classifier and dewaterer. | |
| US3501003A (en) | Method for recovering the solid from a clogging slurry,more particularly iron oxide slurries in steelworks |