EP0061637A1 - Procédé pour emballer des amalgames alumino-thermiques - Google Patents
Procédé pour emballer des amalgames alumino-thermiques Download PDFInfo
- Publication number
- EP0061637A1 EP0061637A1 EP82102056A EP82102056A EP0061637A1 EP 0061637 A1 EP0061637 A1 EP 0061637A1 EP 82102056 A EP82102056 A EP 82102056A EP 82102056 A EP82102056 A EP 82102056A EP 0061637 A1 EP0061637 A1 EP 0061637A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aluminothermic
- packaging unit
- mixture
- packaging
- binding agent
- 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.)
- Withdrawn
Links
- 239000000203 mixture Substances 0.000 title claims description 31
- 238000004806 packaging method and process Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 9
- 239000011230 binding agent Substances 0.000 claims description 13
- 238000005204 segregation Methods 0.000 claims description 6
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 2
- 229920006255 plastic film Polymers 0.000 claims description 2
- 239000004753 textile Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000007133 aluminothermic reaction Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- -1 Polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical class [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
Definitions
- the invention relates to a method for packaging aluminothermic mixtures while preventing segregation during storage and transport.
- Aluminothermic mixtures consist chwermetalloxiden of finely divided aluminum and S, where the mixture to dampen the reaction and / or to form an alloy in the reaction, further finely divided metals, metal oxides, or other alloying elements, such as iron filings, copper, copper oxides, chromium, manganese, carbon or the like, can be added.
- the reactants contained in the aluminothermic mixture In order to achieve a uniform reaction and to control it in a controlled manner, it is necessary for the reactants contained in the aluminothermic mixture to be present within a predetermined particle size range and with a desired particle size distribution.
- the "different specific weights of the reactants in the aluminothermic mixture as well as their specific particle shape cause changes in the optimally adjusted mixing ratio of the reactants within one during transport and storage, especially with shaking stress, as they cannot be excluded during loading and transport Packaging unit, for example a cloth bag containing 7 to 15 kg of aluminothermic mixture as the usual packaging form for aluminothermic welding compounds for carrying out aluminothermic rail connection welds.
- This segregation can lead to an uneven course of the aluminothermic reaction.
- the reaction is too violent or uneven due to the segregation, a part of the melt can be thrown out of the crucible, for example, which endangers the operating personnel and can also lead to faulty welds due to the lack of weld metal or the formation of alloys of undesirable composition.
- Demixed aluminothermic mixtures can also react too slowly, which can lead to heat loss and thus also to faulty welds. Since the majority of the aluminothermic mixtures are used for rail connection welding, such sources of error must be excluded for traffic safety reasons alone.
- the invention is based on the object of finding a simple solution to the problem of preventing the segregation of the aluminothermic mixtures which are optimally mixed during production, without the need to add substances to the mixture which remain in the aluminothermic reaction or which interfere in the event of remaining.
- the bulk density of the reaction mixture should not be reduced. All application properties of the aluminothermic mixture should remain unchanged.
- this object can be achieved in a surprisingly simple manner by combining the aluminothermic mixture with a small amount of a C0 2 -binding agent into a packaging unit consisting of flexible, essentially airtight plastic film, which displaces the air in the packaging unit with C0 2 and the packaging unit in a known manner including the lowest possible CO 2 - Volume hermetically sealed.
- the film forming the packaging unit quickly closes tightly around the aluminothermic mixture, which is solidified into a block. Separation is no longer possible.
- the packaging unit is opened by tearing or cutting the film. The aluminothermic mixture is free-flowing immediately after opening the packaging and can be poured into the reaction crucible.
- the CO 2 binding agent can be distributed in the aluminothermic mixture. This is possible above all if the CO 2 -binding agent does not interfere with the aluminothermic reaction and does not contaminate the metal melt obtained. It is therefore particularly preferred to use finely divided soda lime as an effective, inexpensive and metallurgically indifferent CO 2 binder.
- the majority of the alkali carbonate evaporates as an oxide, the alkaline earths are absorbed by the slag.
- the C0 2 -binding agent can be packaged in a cartridge or a bag made of paper or textile material. It is then possible, after opening the packaging of the aluminothermic mixture, to remove the cartridge or the bag containing the agent which has absorbed the carbon dioxide before the reaction.
- the packaging unit for the aluminothermic mixture generally consists of a sack or pouch made of thermoplastic film which can be easily closed by welding. To achieve higher strength, a film can also be used, which is laminated in particular on the outside with paper.
- Polyethylene films with a thickness of approximately 0.1 to 0.3 mm have proven particularly suitable as the film material.
- a bag 20 cm wide and 40 cm long is formed by cross welding from a tube made of polyethylene film. 10 kg of an aluminothermic mixture of iron oxide, aluminum powder, fine steel granules and manganese powder are filled into this bag. A bag made of cotton fabric measuring 5 x 5 cm and containing 5 g of soda lime is also inserted. The air in this packaging unit is now removed by blowing in C0 2 and replaced by CO 2 . The bag is then sealed and the aluminothermic mixture is distributed in the form of a plate. After a few minutes, the film has wrapped itself so tightly around the aluminothermic mixture that a plate-shaped, rigid block has formed. This rigid block is easy to pack and send in boxes.
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Bag Frames (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3111611 | 1981-03-25 | ||
| DE3111611A DE3111611C1 (de) | 1981-03-25 | 1981-03-25 | Verfahren zur Verhinderung des Entmischens eines aluminothermischen Gemisches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0061637A1 true EP0061637A1 (fr) | 1982-10-06 |
Family
ID=6128170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82102056A Withdrawn EP0061637A1 (fr) | 1981-03-25 | 1982-03-13 | Procédé pour emballer des amalgames alumino-thermiques |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0061637A1 (fr) |
| AU (1) | AU8121182A (fr) |
| DE (1) | DE3111611C1 (fr) |
| ZA (1) | ZA82672B (fr) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT269737B (de) * | 1965-01-07 | 1969-03-25 | Hoeganaes Ab | Behälter zum Verpacken eines Metallpulvers |
| US3922363A (en) * | 1971-03-17 | 1975-11-25 | Japan Foods Storage & Packagin | Method for packing free-flowing materials |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH405153A (de) * | 1962-07-23 | 1965-12-31 | Hesser Ag Maschf | Luftsauerstofffreie gasdichte Verpackung aus flexiblem Packstoff sowie Verfahren zur Herstellung derselben |
| GB1564399A (en) * | 1975-10-13 | 1980-04-10 | Unilever Ltd | Methods of forming evacuated sealed packs particularly of foods |
-
1981
- 1981-03-25 DE DE3111611A patent/DE3111611C1/de not_active Expired
-
1982
- 1982-02-02 ZA ZA82672A patent/ZA82672B/xx unknown
- 1982-03-09 AU AU81211/82A patent/AU8121182A/en not_active Abandoned
- 1982-03-13 EP EP82102056A patent/EP0061637A1/fr not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT269737B (de) * | 1965-01-07 | 1969-03-25 | Hoeganaes Ab | Behälter zum Verpacken eines Metallpulvers |
| US3922363A (en) * | 1971-03-17 | 1975-11-25 | Japan Foods Storage & Packagin | Method for packing free-flowing materials |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8121182A (en) | 1982-09-30 |
| DE3111611C1 (de) | 1982-09-30 |
| ZA82672B (en) | 1982-12-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19820325 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19831022 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHUEMANN, HORST Inventor name: GUNTERMANN, HANS, DR. |