EP0476342A1 - Verfahren zur Regenerierbehandlung von Giesserei-Altsanden - Google Patents
Verfahren zur Regenerierbehandlung von Giesserei-Altsanden Download PDFInfo
- Publication number
- EP0476342A1 EP0476342A1 EP91114045A EP91114045A EP0476342A1 EP 0476342 A1 EP0476342 A1 EP 0476342A1 EP 91114045 A EP91114045 A EP 91114045A EP 91114045 A EP91114045 A EP 91114045A EP 0476342 A1 EP0476342 A1 EP 0476342A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sand
- grains
- basic
- separated
- abrasion
- 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- Withdrawn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
Classifications
-
- 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
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
-
- 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
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
-
- 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
Definitions
- the present invention relates to a method for the regeneration treatment of old foundry sands for reuse instead of core sand, wherein portions of binding agents are first separated from the granular matrix.
- the object of the present invention is to propose a method for the regeneration treatment of old foundry sands, in which the regenerate can be used as core sand, the individual grains of sand being freed from additives in such a way that they can no longer negatively influence the hardening process during core production.
- Molds are usually used to make castings. Due to the thermal action of the liquid metal, the sand is partly destroyed due to the additives used due to the high temperatures of the liquid metal and is therefore unusable. Cores that are used to form the voids in the castings are destroyed when the castings are unpacked and mixed with the bentonite-bonded sand. This mixture of bentonite-bound used sand and core sands is basic and cannot be used for the acid-reacting core binders.
- the basic constituents adhering to the individual sand grains could either be partially removed by abrasion, or they could be evaporated while heating to the evaporation temperature of the basic constituents.
- the volatilization temperature of the basic components is relatively low between 50 and 70 ° C.
- the waste sand obtained from the foundry is first treated mechanically-pneumatically in a known manner in a first stage, i.e. the outer, burnt, dead-burned oolithization casings surrounding the individual grains of sand are blown away by abrasion, impact and impact effects.
- the pre-cleaned sand mixture is loosened up by means of pulsating steel wool packets in such a way that the individual grains are exposed to abrasion contact with the steel wool.
- heated air is drawn through the steel wool packets so that the volatilization of the basic components is initiated.
- the evaporating portion of basic substances is extracted and the rubbed off basic constituents are removed as fine dust.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2897/90A CH681067A5 (ja) | 1990-09-05 | 1990-09-05 | |
CH2897/90 | 1990-09-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0476342A1 true EP0476342A1 (de) | 1992-03-25 |
Family
ID=4244069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91114045A Withdrawn EP0476342A1 (de) | 1990-09-05 | 1991-08-22 | Verfahren zur Regenerierbehandlung von Giesserei-Altsanden |
Country Status (4)
Country | Link |
---|---|
US (1) | US5163496A (ja) |
EP (1) | EP0476342A1 (ja) |
JP (1) | JPH04231141A (ja) |
CH (1) | CH681067A5 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5347069A (en) * | 1992-10-27 | 1994-09-13 | Chevron Research And Technology Company | Treating oily wastes |
EP1205270A4 (en) * | 2000-01-28 | 2004-11-17 | Sintokogio Ltd | METHOD AND DEVICE FOR DISASSEMBLING AND SEPARATING CHILLER MATERIAL AND WET SAND FROM WET SAND CHOCOLATE |
CN1419481A (zh) * | 2000-03-02 | 2003-05-21 | 新东工业株式会社 | 用于处理回收砂的方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2259660A1 (ja) * | 1974-02-01 | 1975-08-29 | Jacob Hermann | |
FR2390227A1 (fr) * | 1977-05-11 | 1978-12-08 | Levy Co Edward C | Procede de recuperation de residus de sable de fonderie et nouveaux produits ainsi obtenus |
EP0125384A1 (de) * | 1983-03-16 | 1984-11-21 | Hubert Eirich | Verfahren zur Regenerierung von Giessereialtsand und Vorrichtung zur Durchführung des Verfahrens |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60216949A (ja) * | 1984-04-11 | 1985-10-30 | Nippon Kokan Keishiyu Kk | 鋳物砂の再生方法 |
-
1990
- 1990-09-05 CH CH2897/90A patent/CH681067A5/fr not_active IP Right Cessation
-
1991
- 1991-08-22 EP EP91114045A patent/EP0476342A1/de not_active Withdrawn
- 1991-09-04 US US07/754,961 patent/US5163496A/en not_active Expired - Fee Related
- 1991-09-05 JP JP3225968A patent/JPH04231141A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2259660A1 (ja) * | 1974-02-01 | 1975-08-29 | Jacob Hermann | |
FR2390227A1 (fr) * | 1977-05-11 | 1978-12-08 | Levy Co Edward C | Procede de recuperation de residus de sable de fonderie et nouveaux produits ainsi obtenus |
EP0125384A1 (de) * | 1983-03-16 | 1984-11-21 | Hubert Eirich | Verfahren zur Regenerierung von Giessereialtsand und Vorrichtung zur Durchführung des Verfahrens |
Non-Patent Citations (3)
Title |
---|
* Seite 353, Spalte 1, Zeile 20 - Spalte 2, Zeile 21 * * |
GIESSEREI Bd. 74, Nr. 10, 11. Mai 1987, DÜSSELDORF, GERMANY Seiten 318 - 321; M. RUZBEHI: 'THERMO-MECHANISCHE REGENERIERUNG VON FORMSTOFFEN MIT EINEM WASSERGLAS-ESTER-BINDERSYSTEM' * |
GIESSEREI Bd. 76, Nr. 10, 15. Mai 1976, DÜSSELDORF Seiten 350 - 358; E.W. WELTZLAR: 'MöGLICHKEITEN UND GRENZEN BEI DER REGENERIERUNG VON GIESSEREIALTSANDEN' * |
Also Published As
Publication number | Publication date |
---|---|
JPH04231141A (ja) | 1992-08-20 |
US5163496A (en) | 1992-11-17 |
CH681067A5 (ja) | 1993-01-15 |
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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: 19910822 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE DK ES FR GB GR IT NL SE |
|
17Q | First examination report despatched |
Effective date: 19931203 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19940414 |