CA2142832A1 - Method for the manufacture of granulated material from molten products - Google Patents
Method for the manufacture of granulated material from molten productsInfo
- Publication number
- CA2142832A1 CA2142832A1 CA002142832A CA2142832A CA2142832A1 CA 2142832 A1 CA2142832 A1 CA 2142832A1 CA 002142832 A CA002142832 A CA 002142832A CA 2142832 A CA2142832 A CA 2142832A CA 2142832 A1 CA2142832 A1 CA 2142832A1
- Authority
- CA
- Canada
- Prior art keywords
- sulfur
- pieces
- fixed bed
- products
- product
- 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
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/26—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic on endless conveyor belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/0237—Converting into particles, e.g. by granulation, milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
- B29B2009/168—Removing undesirable residual components, e.g. solvents, unreacted monomers; Degassing
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Glanulating (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Molten sulfur is converted into solidified pieces of sulfur, i.e., the product being produced. Some of the sulfur evaporates during the process, and that evaporated sulfur is conducted through a cleaner which comprises a bed of sulfur pieces, whereupon a vaporous sulfur component of the evaporated sulfur crystallizes on the sulfur pieces. The sulfur pieces are supplied to the bed from a collection site for the produced pieces. The sulfur pieces are periodically or continuously removed form the bed and combined with the product being produced.
Description
Process for Producing Pellets from Molten Products ~.
The invention relates to a process for producing pellets from molten products, which are solidified as pieces, especially as tablets, and in which process the evaporation products, resulting from the production, are extracted and a fixed bed, which is used to remove through crystallization the vaporous component of the product, is assigned to the extraction flow.
It is well-known that, when sulfur melts are processed into tablet-shaped pellets, the process exhaust air has to be cleaned for environmental protection reasons. Said cleaning is done by introducing into the extraction flow filters or fixed beds made of materials that contain foreign substances, on which the sulfur vapor, which is undesired in the exhaust air, settles as crystals. Sulfur dust is usually collected in filters, which are usually necessary in any case for the production of fine-grained material.
The invention proceeds from the knowledge that, when the process serves the production of lumpy substances, for example, the production of sulfur in the form of tablets, these tablets ~ -produced with the process can also be suitable for effecting the removal by crystallization of the sulfur vapor to be removed from the waste air. Therefore, the invention proposes that a portion of the lumpy, especially tablet-like products is used to form the fixed bed. Excellent cleaning of the waste air can be achieved with this design, as tests have demonstrated. At the same time there is the advantage that a subsequent filtration can be dispensed with. The material of the fixed bed, which consists only of the pure product itself when the process according to the -~
invention is used, can be re-used as the product following use as the fixed bed and can be sold. At the same time one must remember -.
:
. , .. . .
:"
.- ~ . . :
that the fix~d bed itself is continuously emptied and filled again with the product, so that the sulfur vapor is continuously removed by crystallization in an effective manner in the region of the fixed bed.
The invention is explained with reference to a schema~ic drawing of an embodiment. The single drawing depicts a system for producing sulfur tablets. For this purpose sulfur is fed over a line (1) of a feeder (2), which divides the melt into single drops and deposits them in the form of drops on a cooling conveyor (3) made of metal. The feeder (2) is jacketed by a suction hood (4), which exhibits a suction fitting (5), from which a suction line (6) runs to a suction fan (7). A fixed bed (8) is installed into the line (6); said fixed bed serves to let that still vaporous portion of the sulfur that leaves the hood (4) crystallize out, in order to clean the waste air.
From the cooling conveyor (3), the table's, solidified on the right end of the suction hood (4), travel on a conveyor (9) and from said conveyor into a collecting tank (10). The invention proposes diverting a portion of the lumpy product, which has the shape of tablets here and which has accummulated in the collecting tank (10), and using it, as shown in the schematic ;~
drawing with the dashed line (11), as the material for forming the fixed bed (8). The sulfur tablets introduced into the fixed bed (8) are quite suitable for allowing the sulfur vapor to crystallize out on them. The sulfur tablets in the fixed bed (8) can be removed continuously or in batches in the direction of the arrow (12) and replaced by new tablets, which come by the ~upply route (11). Then the tablets, which are removed in the direction of the arrow (12) and consist of pure sulfur, can also be ~ -packaged and sold as the product. Therefore, the bulk of the -vaporous component of the sulfur, produced in this process, can be collected and reused before it flows into the waste air.
~"~' '~''' . :
,. :- . ' .: - ' ,: . ,. ' ' ;-,.: , - , .
The invention relates to a process for producing pellets from molten products, which are solidified as pieces, especially as tablets, and in which process the evaporation products, resulting from the production, are extracted and a fixed bed, which is used to remove through crystallization the vaporous component of the product, is assigned to the extraction flow.
It is well-known that, when sulfur melts are processed into tablet-shaped pellets, the process exhaust air has to be cleaned for environmental protection reasons. Said cleaning is done by introducing into the extraction flow filters or fixed beds made of materials that contain foreign substances, on which the sulfur vapor, which is undesired in the exhaust air, settles as crystals. Sulfur dust is usually collected in filters, which are usually necessary in any case for the production of fine-grained material.
The invention proceeds from the knowledge that, when the process serves the production of lumpy substances, for example, the production of sulfur in the form of tablets, these tablets ~ -produced with the process can also be suitable for effecting the removal by crystallization of the sulfur vapor to be removed from the waste air. Therefore, the invention proposes that a portion of the lumpy, especially tablet-like products is used to form the fixed bed. Excellent cleaning of the waste air can be achieved with this design, as tests have demonstrated. At the same time there is the advantage that a subsequent filtration can be dispensed with. The material of the fixed bed, which consists only of the pure product itself when the process according to the -~
invention is used, can be re-used as the product following use as the fixed bed and can be sold. At the same time one must remember -.
:
. , .. . .
:"
.- ~ . . :
that the fix~d bed itself is continuously emptied and filled again with the product, so that the sulfur vapor is continuously removed by crystallization in an effective manner in the region of the fixed bed.
The invention is explained with reference to a schema~ic drawing of an embodiment. The single drawing depicts a system for producing sulfur tablets. For this purpose sulfur is fed over a line (1) of a feeder (2), which divides the melt into single drops and deposits them in the form of drops on a cooling conveyor (3) made of metal. The feeder (2) is jacketed by a suction hood (4), which exhibits a suction fitting (5), from which a suction line (6) runs to a suction fan (7). A fixed bed (8) is installed into the line (6); said fixed bed serves to let that still vaporous portion of the sulfur that leaves the hood (4) crystallize out, in order to clean the waste air.
From the cooling conveyor (3), the table's, solidified on the right end of the suction hood (4), travel on a conveyor (9) and from said conveyor into a collecting tank (10). The invention proposes diverting a portion of the lumpy product, which has the shape of tablets here and which has accummulated in the collecting tank (10), and using it, as shown in the schematic ;~
drawing with the dashed line (11), as the material for forming the fixed bed (8). The sulfur tablets introduced into the fixed bed (8) are quite suitable for allowing the sulfur vapor to crystallize out on them. The sulfur tablets in the fixed bed (8) can be removed continuously or in batches in the direction of the arrow (12) and replaced by new tablets, which come by the ~upply route (11). Then the tablets, which are removed in the direction of the arrow (12) and consist of pure sulfur, can also be ~ -packaged and sold as the product. Therefore, the bulk of the -vaporous component of the sulfur, produced in this process, can be collected and reused before it flows into the waste air.
~"~' '~''' . :
,. :- . ' .: - ' ,: . ,. ' ' ;-,.: , - , .
Claims (2)
1. Process for producing pellets from molten products, which are solidified as pieces, especially as tablets, and in which process the evaporation products, resulting from the production, are extracted and a fixed bed, which is used to remove through crystallization the vaporous component of the product, is assigned to the extraction flow, wherein a portion of the lumpy, especially tablet-like products, is used to form the fixed bed (8).
2. Process, as claimed in claim 1, wherein the lumpy products of the fixed bed (8) are also used as the end product.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4322629A DE4322629C1 (en) | 1993-07-07 | 1993-07-07 | Process for producing granules (pellets) from molten products |
| DEP4322629.9 | 1993-07-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2142832A1 true CA2142832A1 (en) | 1995-01-19 |
Family
ID=6492185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002142832A Abandoned CA2142832A1 (en) | 1993-07-07 | 1994-06-28 | Method for the manufacture of granulated material from molten products |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0658129A1 (en) |
| JP (1) | JPH08504129A (en) |
| KR (1) | KR950702865A (en) |
| CN (1) | CN1111901A (en) |
| AU (1) | AU7124894A (en) |
| CA (1) | CA2142832A1 (en) |
| DE (1) | DE4322629C1 (en) |
| RU (1) | RU95108248A (en) |
| WO (1) | WO1995001833A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8349229B2 (en) | 2007-12-11 | 2013-01-08 | Sandvik Materials Technology Deutschland Gmbh | Method and drop former for producing tablets and method for producing a sulfurous fertilizer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1301606A (en) * | 1961-09-22 | 1962-08-17 | United States Steel Corp | Improved method and apparatus for agglomeration or sintering |
| CA1258036A (en) * | 1984-11-28 | 1989-08-01 | Johannes Bakker | Filter screen for the air outlet of an apparatus for producing solid sulphur particles |
| DE4041669C1 (en) * | 1990-12-22 | 1992-03-12 | Santrade Ltd., Luzern, Ch | Continuous purificn. of chemical substances - comprises solidifying molten substance into tablets by passing under coolant nozzles and subjecting to hot gas stream to (sweat) tablets |
-
1993
- 1993-07-07 DE DE4322629A patent/DE4322629C1/en not_active Expired - Fee Related
-
1994
- 1994-06-28 CA CA002142832A patent/CA2142832A1/en not_active Abandoned
- 1994-06-28 WO PCT/EP1994/002093 patent/WO1995001833A1/en not_active Application Discontinuation
- 1994-06-28 KR KR1019950700588A patent/KR950702865A/en not_active Application Discontinuation
- 1994-06-28 EP EP94920468A patent/EP0658129A1/en not_active Ceased
- 1994-06-28 CN CN94190481A patent/CN1111901A/en active Pending
- 1994-06-28 JP JP7503798A patent/JPH08504129A/en active Pending
- 1994-06-28 AU AU71248/94A patent/AU7124894A/en not_active Abandoned
- 1994-06-28 RU RU95108248/25A patent/RU95108248A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8349229B2 (en) | 2007-12-11 | 2013-01-08 | Sandvik Materials Technology Deutschland Gmbh | Method and drop former for producing tablets and method for producing a sulfurous fertilizer |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995001833A1 (en) | 1995-01-19 |
| CN1111901A (en) | 1995-11-15 |
| RU95108248A (en) | 1996-12-20 |
| JPH08504129A (en) | 1996-05-07 |
| EP0658129A1 (en) | 1995-06-21 |
| AU7124894A (en) | 1995-02-06 |
| DE4322629C1 (en) | 1994-08-18 |
| KR950702865A (en) | 1995-08-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |