EP0476342A1 - Verfahren zur Regenerierbehandlung von Giesserei-Altsanden - Google Patents

Verfahren zur Regenerierbehandlung von Giesserei-Altsanden Download PDF

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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Withdrawn
Application number
EP91114045A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hermann Jacob
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Georg Fischer AG filed Critical Georg Fischer AG
Publication of EP0476342A1 publication Critical patent/EP0476342A1/de
Withdrawn legal-status Critical Current

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)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Mold Materials And Core Materials (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
EP91114045A 1990-09-05 1991-08-22 Verfahren zur Regenerierbehandlung von Giesserei-Altsanden Withdrawn EP0476342A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2897/90 1990-09-05
CH2897/90A CH681067A5 (zh) 1990-09-05 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 (zh)
EP (1) EP0476342A1 (zh)
JP (1) JPH04231141A (zh)
CH (1) CH681067A5 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347069A (en) * 1992-10-27 1994-09-13 Chevron Research And Technology Company Treating oily wastes
KR20010113871A (ko) * 2000-01-28 2001-12-28 니시 마코토 생사 주형으로부터 주형 재료와 주형 생사를 붕괴하고분리시키는 방법 및 장치
WO2001064371A1 (fr) * 2000-03-02 2001-09-07 Sintokogio, Ltd. Procede de traitement de sable collecte

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2259660A1 (zh) * 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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2259660A1 (zh) * 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)

* Cited by examiner, † Cited by third party
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
CH681067A5 (zh) 1993-01-15
US5163496A (en) 1992-11-17

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