EP1302259A1 - Process for binding pollutants - Google Patents

Process for binding pollutants Download PDF

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Publication number
EP1302259A1
EP1302259A1 EP02022738A EP02022738A EP1302259A1 EP 1302259 A1 EP1302259 A1 EP 1302259A1 EP 02022738 A EP02022738 A EP 02022738A EP 02022738 A EP02022738 A EP 02022738A EP 1302259 A1 EP1302259 A1 EP 1302259A1
Authority
EP
European Patent Office
Prior art keywords
foundry sand
water
hydrogen peroxide
production process
foundry
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.)
Granted
Application number
EP02022738A
Other languages
German (de)
French (fr)
Other versions
EP1302259B1 (en
Inventor
Heinrich L. Dipl.-Ing. Folz
Michael Dr. Wobido
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.)
Intermet Neunkirchen GmbH
Original Assignee
Intermet Neunkirchen GmbH
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 Intermet Neunkirchen GmbH filed Critical Intermet Neunkirchen GmbH
Publication of EP1302259A1 publication Critical patent/EP1302259A1/en
Application granted granted Critical
Publication of EP1302259B1 publication Critical patent/EP1302259B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B22C1/18—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 of inorganic agents
    • 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

Definitions

  • the invention relates to a method for binding pollutants according to the preamble of Claim 1.
  • This object is achieved according to the invention by a method according to claim 1, according to which at least one water-containing substance is used to bind pollutants in production processes in foundry systems in the production process, this water-containing substance partially consisting of H 2 O 2 according to the invention and the water-containing substance being foundry sand.
  • the binding can take place in a chemical oxidation or reduction reaction.
  • the hydrogen peroxide is a comparatively unstable substance that enters a water molecule as well as a single oxygen atom decays. This single oxygen atom acts as a free one Radical chemical reactions quickly occur. By adding Hydrogen peroxide can therefore be released by oxidation.
  • This Pollutants can be organic substances such as benzenes. There is also one Cleaning of dust is conceivable.
  • the foundry sand is in the ongoing production process is used.
  • the foundry sand is located in Circulation. After running through the production process, the foundry sand is passed through Addition of new substances processed so that this foundry sand is used in the production process has the desired composition.
  • H 2 O 2 can advantageously be added to the foundry sand in this preparation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Processing Of Solid Wastes (AREA)
  • Hydrogen, Water And Hydrids (AREA)

Abstract

Process for binding pollutants in production processes in casting devices comprises using a water-containing material consisting of hydrogen peroxide and foundry sand. <??>Preferred Features: The foundry sand is prepared before it is used in the production process and hydrogen peroxide is then added to it.

Description

Die Erfindung betrifft ein Verfahren zum Binden von Schadstoffen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for binding pollutants according to the preamble of Claim 1.

In Produktionsprozessen, wie beispielsweise auch in Gießereianlagen, kommt es zu Schadstoffemissionen wie beispielsweise Emissionen von Benzolen bzw. deren Vorprodukten. Der vorliegenden Erfindung liegt daher das Problem zu Grunde, derartige Emissionen zu senken.It happens in production processes, such as in foundry plants Pollutant emissions such as emissions of benzene or their Precursors. The present invention is therefore based on the problem of such Reduce emissions.

Diese Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren nach Anspruch 1, wonach zum Binden von Schadstoffen in Produktionsprozessen in Gießereianlagen im Produktionsprozess wenigstens ein wasserhaltiger Stoff verwendet wird, wobei dieser wasserhaltige Stoff erfindungsgemäß teilweise aus H2O2 besteht und wobei der wasserhaltige Stoff Gießereisand ist.This object is achieved according to the invention by a method according to claim 1, according to which at least one water-containing substance is used to bind pollutants in production processes in foundry systems in the production process, this water-containing substance partially consisting of H 2 O 2 according to the invention and the water-containing substance being foundry sand.

Das Binden kann in einer chemischen Oxidations- oder Reduktionsreaktion erfolgen.The binding can take place in a chemical oxidation or reduction reaction.

Das Wasserstoffperoxyd ist ein vergleichsweise instabiler Stoff, der in ein Wassermolekül sowie ein einzelnes Sauerstoffatom zerfällt. Dieses einzelne Sauerstoffatom führt als freies Radikal wiederum schnell chemische Reaktionen aus. Durch die Zugabe von Wasserstoffperoxyd können also Schadstoffe durch eine Oxidation ausgebracht werden. Diese Schadstoffe können organische Stoffe wie beispielsweise Benzole sein. Ebenso ist auch eine Reinigung von Stäuben denkbar.The hydrogen peroxide is a comparatively unstable substance that enters a water molecule as well as a single oxygen atom decays. This single oxygen atom acts as a free one Radical chemical reactions quickly occur. By adding Hydrogen peroxide can therefore be released by oxidation. This Pollutants can be organic substances such as benzenes. There is also one Cleaning of dust is conceivable.

Dabei erweist es sich in Gießereianlagen als vorteilhaft, dass der Gießereisand sowieso im laufenden Produktionsprozess verwendet wird. Der Gießereisand befindet sich dabei im Umlauf. Nach einem Durchlauf des Produktionsprozesses wird der Gießereisand durch Zugabe neuer Stoffe aufbereitet, damit dieser Gießereisand die im Produktionsprozess gewünschte Zusammensetzung hat. It proves to be advantageous in foundry systems that the foundry sand is in the ongoing production process is used. The foundry sand is located in Circulation. After running through the production process, the foundry sand is passed through Addition of new substances processed so that this foundry sand is used in the production process has the desired composition.

Vorteilhaft kann gemäß Anspruch 2 dem Gießereisand bei dieser Aufbereitung H2O2 zugegeben werden.According to claim 2, H 2 O 2 can advantageously be added to the foundry sand in this preparation.

Dadurch ist für die Anreicherung mit dem Wasserstoffperoxyd vorteilhaft kein weiterer Schritt in der Vorbereitung notwendig, wenn diese Anreicherung in der ohnehin erforderlichen Aufbereitung des Gießereisandes vor dem Einsatz im Produktionsprozess erfolgt. Dabei wird dann das Wasserstoffperoxyd dem Wasser beigegeben, so dass dem Gießereisand dann also ein dotiertes Gemisch aus Wasser und Wasserstoffperoxyd zugegeben wird.As a result, no other is advantageous for the enrichment with the hydrogen peroxide Step in preparation is necessary if this enrichment in the anyway necessary processing of the foundry sand before use in the production process he follows. The hydrogen peroxide is then added to the water, so that Foundry sand then added a doped mixture of water and hydrogen peroxide becomes.

Es hat sich bei der Beigabe des Wasserstoffperoxyds als vorteilhaft erwiesen, etwa 0,1% - 1% H2O2 im Wasser beizugeben.When adding the hydrogen peroxide, it has proven advantageous to add about 0.1% to 1% H 2 O 2 in the water.

Wegen des Zersetzungsprozesses des Wasserstoffperoxyds hat es sich weiterhin als vorteilhaft erwiesen, die Beigabe des Wasserstoffperoxyds innerhalb einer bis zwei Stunden vor der Verwendung des Gießereisandes im Produktionsprozess vorzunehmen.Because of the decomposition process of hydrogen peroxide, it has continued to proved to be advantageous to add the hydrogen peroxide within one to two hours before using the foundry sand in the production process.

Claims (2)

Verfahren zum Binden von Schadstoffen in Produktionsprozessen in Gießereianlagen, wobei im Produktionsprozess wenigstens ein wasserhaltiger Stoff verwendet wird,
dadurch gekennzeichnet, dass dieser wasserhaltige Stoff teilweise aus H2O2 besteht und dass der wasserhaltige Stoff Gießereisand ist.Process for binding pollutants in production processes in foundry plants, at least one water-containing substance being used in the production process,
characterized in that this water-containing substance partly consists of H 2 O 2 and that the water-containing substance is foundry sand. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass der Gießereisand vor der Verwendung im Produktionsprozess aufbereitet wird, wobei bei dieser Aufbereitung H2O2 zugegeben wird.Method according to claim 1,
characterized in that the foundry sand is processed before use in the production process, H 2 O 2 being added in this treatment.
EP02022738A 2001-10-15 2002-10-11 Process for binding pollutants Expired - Lifetime EP1302259B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10150564A DE10150564B4 (en) 2001-10-15 2001-10-15 Method for binding pollutants
DE10150564 2001-10-15

Publications (2)

Publication Number Publication Date
EP1302259A1 true EP1302259A1 (en) 2003-04-16
EP1302259B1 EP1302259B1 (en) 2007-01-03

Family

ID=7702381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02022738A Expired - Lifetime EP1302259B1 (en) 2001-10-15 2002-10-11 Process for binding pollutants

Country Status (3)

Country Link
EP (1) EP1302259B1 (en)
AT (1) ATE350180T1 (en)
DE (2) DE10150564B4 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291727A (en) * 1976-01-30 1977-08-02 Maezawa Kogyo Recovering of silica sand from old 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
DE4321296A1 (en) * 1993-06-26 1995-01-05 Noell Abfall & Energietech Process and plant for the wet regeneration of granular bulk goods contaminated with impurities and pollutants
DE4321297A1 (en) * 1993-06-26 1995-01-05 Noell Abfall & Energietech Process for the wet regeneration of bulk goods contaminated with impurities and pollutants
US5769933A (en) * 1996-06-21 1998-06-23 Amcol International Corporation Activated carbon foundry sand additives and method of casting metal for reduced VOC emissions
DE19753254A1 (en) * 1997-12-01 1999-06-02 Lottermoser Manfred Recovery of sand from resin bonded molds
US6271284B1 (en) * 1997-03-04 2001-08-07 Ashland Inc. Sleeves, their preparation, and use

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492799A1 (en) * 1980-10-28 1982-04-30 Sapic METHOD FOR STABILIZING AQUEOUS SOLUTION OF HYDROGEN PEROXIDE, STABLE AQUEOUS HYDROGEN PEROXIDE SOLUTION, AND METHOD OF USING THE OXIDANT PROPERTIES OF SAID SOLUTION
US5810918A (en) * 1996-06-21 1998-09-22 Amcol International Corporation Method of analyzing and/or treating foundry sands for reduced VOCs

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS5291727A (en) * 1976-01-30 1977-08-02 Maezawa Kogyo Recovering of silica sand from old sand
DE4321296A1 (en) * 1993-06-26 1995-01-05 Noell Abfall & Energietech Process and plant for the wet regeneration of granular bulk goods contaminated with impurities and pollutants
DE4321297A1 (en) * 1993-06-26 1995-01-05 Noell Abfall & Energietech Process for the wet regeneration of bulk goods contaminated with impurities and pollutants
US5769933A (en) * 1996-06-21 1998-06-23 Amcol International Corporation Activated carbon foundry sand additives and method of casting metal for reduced VOC emissions
US6271284B1 (en) * 1997-03-04 2001-08-07 Ashland Inc. Sleeves, their preparation, and use
DE19753254A1 (en) * 1997-12-01 1999-06-02 Lottermoser Manfred Recovery of sand from resin bonded molds

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 197737, Derwent World Patents Index; Class M22, AN 1977-65585Y, XP002230433 *

Also Published As

Publication number Publication date
DE10150564B4 (en) 2005-08-04
EP1302259B1 (en) 2007-01-03
DE10150564A1 (en) 2003-04-30
DE50209146D1 (en) 2007-02-15
ATE350180T1 (en) 2007-01-15

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