EP1302259B1 - Process for binding pollutants - Google Patents
Process for binding pollutants Download PDFInfo
- Publication number
- EP1302259B1 EP1302259B1 EP02022738A EP02022738A EP1302259B1 EP 1302259 B1 EP1302259 B1 EP 1302259B1 EP 02022738 A EP02022738 A EP 02022738A EP 02022738 A EP02022738 A EP 02022738A EP 1302259 B1 EP1302259 B1 EP 1302259B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- foundry sand
- hydrogen peroxide
- production process
- water
- pollutants
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000003344 environmental pollutant Substances 0.000 title abstract description 7
- 231100000719 pollutant Toxicity 0.000 title abstract description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims description 9
- 238000005266 casting Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 150000001555 benzenes Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
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 patent claim 1.
- This object is achieved by a method according to claim 1, wherein at least one hydrous substance is used for binding of pollutants in production processes in foundry plants in the production process, wherein the hydrous substance is H 2 O 2 containing foundry sand.
- the foundry sand is thereby processed by adding H 2 O 2 to the foundry sand prior to use in the production process.
- the binding can be done in a chemical oxidation or reduction reaction.
- Hydrogen peroxide is a relatively unstable substance that breaks down into a water molecule and a single oxygen atom. Again, this single oxygen atom, as a free radical, quickly conducts chemical reactions. By the addition of hydrogen peroxide so pollutants can be applied by oxidation. These Pollutants can be organic substances such as benzenes. Likewise, a cleaning of dusts is conceivable.
- the foundry sand is anyway used in the ongoing production process.
- the foundry sand is in circulation. After a pass through the production process, the foundry sand is treated by adding new substances so that this foundry sand has the desired composition in the production process.
- the foundry sand is enriched with hydrogen peroxide already before use in the production process, it proves to be advantageous that this enrichment can be done in the already required preparation of the foundry sand prior to its use in the production process. As a result, no separate processing step of the sand is necessary.
- the Wasscrstoffperoyd the water is added so that the foundry sand then so a doped mixture of water and hydrogen peroxide is added.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
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 patent claim 1.
Es ist aus verschiedenen Veröffentlichungen bereits bekannt, H2O2 einzusetzen, um Verunreinigungen im Gießereisand möglichst Umwelt schonend zu beseitigen. (Database WPI Section Ch, Week 199737 Derwent Publications Ltd., London, GB; Class M22, AN 1977-65585Y XP002230433 & JP 52 091727 A (MFSAWA KOGYO KK) 2. August 1977 (1977-08-02); DE 197 53 254 A1; US 4 113 510 A). Bei diesem Stand der Technik wird das Wasserstoffperoxyd eingesetzt, um den Gießereisand nach einem Umlauf bei der Produktion von den aufgetretenen Verunreinigungen zu säubern.It is already known from various publications to use H 2 O 2 in order to eliminate impurities in the foundry sand as gently as possible in the environment. (Database WPI Section Ch, Week 199737 Derwent Publications Ltd, London, UK; Class M22, AN 1977-65585Y XP002230433 & JP 52 091727 A (MFSAWA KOGYO KK) August 2, 1977 (1977-08-02); DE 197 53 254 A1, US 4 113 510 A). In this prior art, the hydrogen peroxide is used to clean the foundry sand after a circulation in the production of the impurities encountered.
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.In production processes, such as in foundry plants, there are pollutant emissions such as emissions of benzenes or their precursors. The present invention is therefore based on the problem of reducing such 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 der wasserhaltige Stoff H2O2 enthaltender Gießereisand ist. Der Gießereisand wird dabei aufbereitet, indem dem Gießereisand vor der Verwendung im Produktionsprozess H2O2 zugegeben wird.This object is achieved by a method according to claim 1, wherein at least one hydrous substance is used for binding of pollutants in production processes in foundry plants in the production process, wherein the hydrous substance is H 2 O 2 containing foundry sand. The foundry sand is thereby processed by adding H 2 O 2 to the foundry sand prior to use in the production process.
Das Binden kann in einer chemischen Oxidations- oder Reduktionsreaktion erfolgen.The binding can be done 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.Hydrogen peroxide is a relatively unstable substance that breaks down into a water molecule and a single oxygen atom. Again, this single oxygen atom, as a free radical, quickly conducts chemical reactions. By the addition of hydrogen peroxide so pollutants can be applied by oxidation. These Pollutants can be organic substances such as benzenes. Likewise, a cleaning of dusts 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 plants that the foundry sand is anyway used in the ongoing production process. The foundry sand is in circulation. After a pass through the production process, the foundry sand is treated by adding new substances so that this foundry sand has the desired composition in the production process.
Indem der Gießereisand bereits vor der Verwendung im Produktionsprozess mit Wasserstoffperoxyd angereichert wird, erweist es sich als vorteilhaft, dass diese Anreicherung bei der ohnehin erforderlichen Aufbereitung des Gießersandes vor dessen Verwendung im Produktionsprozess erfolgen kann. Dadurch ist kein separater Aufbereitungsschritt des Sandes notwendig. Dabei wird das Wasscrstoffperoyd dem Wasser beigegeben, so dass dem Gießersand dann also ein dotiertes Gemisch aus Wasser und Wasserstoffperoyd zugegeben wird.By the foundry sand is enriched with hydrogen peroxide already before use in the production process, it proves to be advantageous that this enrichment can be done in the already required preparation of the foundry sand prior to its use in the production process. As a result, no separate processing step of the sand is necessary. The Wasscrstoffperoyd the water is added so that the foundry sand then so a doped mixture of water and hydrogen peroxide is added.
Es hat sich bei der Beigabe des Wasserstoffperoyds als vorteilhaft erwiesen, etwa 0,1 % - 1% H2O2 im Wasser beizugeben.It has proven advantageous in the addition of the hydrogen peroxide to add about 0.1% to 1% of H 2 O 2 in the water.
Wegen des Zersetzungsprozesses 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, it has also proved advantageous to add the hydrogen peroxide within one to two hours prior to the use of the foundry sand in the production process.
Claims (1)
- Process for binding harmful substances in production processes in foundries, wherein at least one water-containing substance is used in the production process besides the use of H2O2, characterized in that the water-containing substance is foundry sand which contains H2O2, the foundry sand being pretreated before its use in the production process by adding H2O2 in the course of the pretreatment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10150564 | 2001-10-15 | ||
| DE10150564A DE10150564B4 (en) | 2001-10-15 | 2001-10-15 | Method for binding pollutants |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1302259A1 EP1302259A1 (en) | 2003-04-16 |
| EP1302259B1 true 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) |
Family Cites Families (9)
| 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 |
| 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 |
| 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 |
| DE4321297C2 (en) * | 1993-06-26 | 1999-06-17 | Krc Umwelttechnik Gmbh | Process for the wet regeneration of granular bulk goods contaminated with contaminants 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 |
| US5810918A (en) * | 1996-06-21 | 1998-09-22 | Amcol International Corporation | Method of analyzing and/or treating foundry sands for reduced VOCs |
| US5880175A (en) * | 1997-03-04 | 1999-03-09 | Ashland Inc. | Amine cured foundry binder system and their uses |
| DE19753254A1 (en) * | 1997-12-01 | 1999-06-02 | Lottermoser Manfred | Recovery of sand from resin bonded molds |
-
2001
- 2001-10-15 DE DE10150564A patent/DE10150564B4/en not_active Expired - Fee Related
-
2002
- 2002-10-11 EP EP02022738A patent/EP1302259B1/en not_active Expired - Lifetime
- 2002-10-11 DE DE50209146T patent/DE50209146D1/en not_active Expired - Lifetime
- 2002-10-11 AT AT02022738T patent/ATE350180T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE50209146D1 (en) | 2007-02-15 |
| EP1302259A1 (en) | 2003-04-16 |
| ATE350180T1 (en) | 2007-01-15 |
| DE10150564B4 (en) | 2005-08-04 |
| DE10150564A1 (en) | 2003-04-30 |
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