KR910015345A - How to reclaim foundry sand and its regenerated foundry sand - Google Patents

How to reclaim foundry sand and its regenerated foundry sand Download PDF

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Publication number
KR910015345A
KR910015345A KR1019900009544A KR900009544A KR910015345A KR 910015345 A KR910015345 A KR 910015345A KR 1019900009544 A KR1019900009544 A KR 1019900009544A KR 900009544 A KR900009544 A KR 900009544A KR 910015345 A KR910015345 A KR 910015345A
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KR
South Korea
Prior art keywords
sand
neutralization
treatment
neutralized
foundry sand
Prior art date
Application number
KR1019900009544A
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Korean (ko)
Inventor
베. 좀머 헤르만
Original Assignee
하. 베. 좀머
새즈 좀머 알루미늄 츄크 악티엔계젤샤프트
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Publication date
Application filed by 하. 베. 좀머, 새즈 좀머 알루미늄 츄크 악티엔계젤샤프트 filed Critical 하. 베. 좀머
Publication of KR910015345A publication Critical patent/KR910015345A/en

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    • 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
    • B22C5/185—Plants for preparing mould materials comprising a wet reclamation step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Processing Of Solid Wastes (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Treatment Of Sludge (AREA)

Abstract

내용 없음No content

Description

주물사를 재생시키는 방법과 그 재생된 주물사How to reclaim foundry sand and its regenerated foundry sand

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

도면은 본 발명에 따라 건조된 모래를 중화, 세척 및 건조를 하는 장치의 개략도.Figure is a schematic diagram of an apparatus for neutralizing, washing and drying the dried sand according to the present invention.

Claims (11)

유기질 및/또는 부기질바인더를 포함하는 단일의 또는 혼합된 주물사를 재생하는 방법으로, 유기질바인더를 포함하는 모래는 열처리후에, 또는 무기질바인더를 포함하는 모래는 열처리 및 기계적처리 후에 pH값 측정절차에 의해 결정된 pH값에 따라 적절한 염기 또는 산으로 중화시켜 모래가 대체로 6~8사이의 pH값을 갖도록 함을 특징으로 하는 주물사 처리방법.A method of regenerating a single or mixed foundry sand comprising organic and / or subsidiary binders, wherein the sand comprising the organic binder is subjected to heat treatment or the sand containing the inorganic binder is subjected to the pH value measuring procedure after the heat treatment and mechanical treatment. The method for treating sand sand according to claim 1, wherein the sand is neutralized with a suitable base or acid so that the sand has a pH value of about 6-8. 제1항에 있어서, 중화후에 모래의 pH값이 6.8~7.5사이에 있음을 특징으로 하는 방법.The method of claim 1 wherein the pH value of the sand after neutralization is between 6.8 and 7.5. 제1항에 있어서, 모래는 습식정제를 하고, 그 다음에 중화후에 건조함을 특징으로 하는 방법.The method of claim 1, wherein the sand is wet purified and then dried after neutralization. 제1항에 있어서, 중화에 대해 염기로서 NH4OH를 사용하거나 또는 산으로서 황산 또는 플루오르화수소산을 사용함을 특징으로 하는 방법.The process according to claim 1, characterized in that NH 4 OH is used as the base for neutralization or sulfuric acid or hydrofluoric acid is used as the acid. 제1항에 있어서, 처리된 후에 염기성인 모래 kg당 3~50ml양의 진한황산을 가하여 중화함을 특징으로하는 방법.The method according to claim 1, wherein after the treatment is neutralized by adding 3-50 ml of concentrated sulfuric acid per kg of basic sand. 제1항에 있어서, 처리된 후에 염기성인 모래 kg당 8~12ml양의 진한황산을 가하여 중화함을 특징으로하는 방법.The method according to claim 1, wherein after the treatment is neutralized by adding 8-12 ml of concentrated sulfuric acid per kg of basic sand. 제1항에 있어서, 처리된 후에 산성인 모래 kg당 3~40ml양의 25% NH4OH를 가하여 중화함을 특징으로하는 방법.The method of claim 1 wherein after treatment, neutralization is performed by adding 25% NH 4 OH in an amount of 3-40 ml per kg of acidic sand. 제1항에 있어서, 처리된 후에 산성인 모래 kg당 12ml양의 25%-NH4OH를 가하여 중화함을 특징으로하는 방법.The method according to claim 1, characterized in that after treatment is neutralized by adding 12% of 25% -NH 4 OH per kg of acidic sand. 제1항에 있어서, 중화 및 정제가 폐쇄된 순환 시스템내에서 및 단일용기내에서 실시됨을 특징으로하는 방법.The method of claim 1, wherein the neutralization and purification are carried out in a closed circulation system and in a single vessel. 제1항 또는 제6항에 있어서, 사용된 중화용액을 걸러서 정제하고, 새로운 물로 깨끗하게 한 후에 중화과정에 재사용함을 특징으로하는 방법.The method according to claim 1 or 6, characterized in that the neutralization solution used is filtered off, purified with fresh water and then reused in the neutralization process. 주물사에 포함된 바인더에 따라 열처리 및 기계적 처리를 하고 그 다음에 pH값이 6.8-7.5사이가 되도록 중화하여 얻을 수 있는 재생주물사.Regenerated foundry sand obtained by heat treatment and mechanical treatment in accordance with the binder contained in the foundry sand and then neutralizing it to pH value between 6.8-7.5. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900009544A 1990-02-14 1990-06-27 How to reclaim foundry sand and its regenerated foundry sand KR910015345A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4004553A DE4004553C1 (en) 1990-02-14 1990-02-14
DEP4004553.6 1990-02-14

Publications (1)

Publication Number Publication Date
KR910015345A true KR910015345A (en) 1991-09-30

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ID=6400137

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KR1019900009544A KR910015345A (en) 1990-02-14 1990-06-27 How to reclaim foundry sand and its regenerated foundry sand

Country Status (15)

Country Link
EP (1) EP0446402A1 (en)
JP (1) JPH03238141A (en)
KR (1) KR910015345A (en)
CN (1) CN1054021A (en)
BR (1) BR9003152A (en)
CA (1) CA2022769A1 (en)
CS (1) CS219190A2 (en)
DD (1) DD297087A5 (en)
DE (1) DE4004553C1 (en)
DK (1) DK149890A (en)
FI (1) FI902822A (en)
HU (1) HUT58008A (en)
NO (1) NO902410L (en)
PL (1) PL285083A1 (en)
PT (1) PT94164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100824100B1 (en) * 2001-01-15 2008-04-21 신토고교 가부시키가이샤 A method for making sand covered with bentonite, the sand, and a method for recycling molding sand for a mold using the sand covered by bentonite

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129863A1 (en) * 1991-09-07 1993-03-11 Hanf Carl Elino Ind Ofenbau Bentonite bound foundry moulding sand conditioning process - by heat treatment of precleaned sand for high quality sand useful for core prodn.
DE19927107A1 (en) * 1999-06-14 2000-12-21 Fischer Georg Gmbh & Co Kg Device to reduce odorous emissions from a casting installation has a container for bio catalysts and/or enzymes and active region in which the bio catalysts and/or the enzymes interact with the substances causing the odorous emissions
DE102007027298A1 (en) * 2007-06-11 2008-12-18 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Process for the treatment of foundry sand
CN102059319B (en) * 2011-01-19 2012-12-19 昆明理工大学 Joint regeneration method for old resin sand
CN102500458B (en) * 2011-11-28 2014-07-09 河海大学 Sand washing method and special device thereof
CN102615243B (en) * 2012-03-27 2013-09-18 华中科技大学 Foundry used sand wet intermittent regeneration method and equipment thereof
JP2016147287A (en) * 2015-02-12 2016-08-18 マツダ株式会社 Casting sand regeneration process, and polishing device
ES2874204T5 (en) * 2018-06-29 2024-10-07 Nemak Sab De Cv Procedure for preparing a foundry sand mixture
JP7142563B2 (en) * 2018-12-26 2022-09-27 伊藤忠セラテック株式会社 How to recycle recovered sand
EP3797896A1 (en) * 2019-09-27 2021-03-31 Finn Recycling OY Cleaning sand used at foundry

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US414388A (en) * 1889-11-05 emmens
DE2233111C3 (en) * 1972-07-06 1974-11-28 Hermann 2105 Seevetal Jacob Method and device for the regeneration of synthetic resin-bonded foundry sand
US4113510A (en) * 1974-06-07 1978-09-12 Societe D'applications De Procedes Industriels Et Chimiques S.A.P.I.C. Process for regenerating foundry sand
CA1050209A (en) * 1974-12-16 1979-03-13 Julius M. Bleuenstein Sand reclamation and purification
JPS5292823A (en) * 1976-02-02 1977-08-04 Hitachi Ltd Old sand cleaning reproduction process
DE2656672C2 (en) * 1976-12-15 1978-09-21 Daimler-Benz Ag, 7000 Stuttgart Procedure for regenerating core sand
CH631643A5 (en) * 1978-04-14 1982-08-31 Fischer Ag Georg METHOD FOR REGENERATING OLD FOUNDRY SAND AND DEVICE FOR CARRYING OUT THE METHOD AND PRODUCT OF THE METHOD.
US4401638A (en) * 1981-12-21 1983-08-30 Materias Primas, Monterrey, S.A. Process for purifying silica sand
GB8317669D0 (en) * 1983-06-29 1983-08-03 British Ind Sand Ltd Chemical treatment of sand
EP0152230A1 (en) * 1984-02-03 1985-08-21 Steel Castings Research And Trade Association Reclamation of foundry sands

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100824100B1 (en) * 2001-01-15 2008-04-21 신토고교 가부시키가이샤 A method for making sand covered with bentonite, the sand, and a method for recycling molding sand for a mold using the sand covered by bentonite

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JPH03238141A (en) 1991-10-23
HUT58008A (en) 1992-01-28
NO902410D0 (en) 1990-05-31
DE4004553C1 (en) 1991-10-10
FI902822A0 (en) 1990-06-06
CN1054021A (en) 1991-08-28
FI902822A (en) 1991-08-15
NO902410L (en) 1991-08-15
DK149890A (en) 1991-08-15
DD297087A5 (en) 1992-01-02
CA2022769A1 (en) 1991-08-15
PL285083A1 (en) 1991-10-07
BR9003152A (en) 1991-11-12
CS219190A2 (en) 1991-09-15
EP0446402A1 (en) 1991-09-18
PT94164A (en) 1991-09-30
DK149890D0 (en) 1990-06-19
HU903815D0 (en) 1990-11-28

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