DE19529218A1 - Process for treating lime-contg. steelworks slag - involves adding used foundry sand to form building material - Google Patents
Process for treating lime-contg. steelworks slag - involves adding used foundry sand to form building materialInfo
- Publication number
- DE19529218A1 DE19529218A1 DE1995129218 DE19529218A DE19529218A1 DE 19529218 A1 DE19529218 A1 DE 19529218A1 DE 1995129218 DE1995129218 DE 1995129218 DE 19529218 A DE19529218 A DE 19529218A DE 19529218 A1 DE19529218 A1 DE 19529218A1
- Authority
- DE
- Germany
- Prior art keywords
- slag
- foundry sand
- contg
- building material
- used 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.)
- Ceased
Links
- 239000002893 slag Substances 0.000 title claims abstract description 16
- 239000004576 sand Substances 0.000 title claims abstract description 10
- 239000004566 building material Substances 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims 1
- 239000010881 fly ash Substances 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000013589 supplement Substances 0.000 abstract 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 235000011941 Tilia x europaea Nutrition 0.000 description 7
- 239000004571 lime Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 3
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 3
- 235000019976 tricalcium silicate Nutrition 0.000 description 3
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Aufbereitung von kalkhaltiger Stahlwerksschlacke zur Verwen dung in Baustoffen.The present invention relates to a method for Processing of calcareous steel slag for use in building materials.
Bei der Stahlerzeugung werden dem flüssigen Roheisen erhöhte Kalkmengen zugesetzt, um unerwünschte Begleitkomponenten im Roheisen zu verschlacken. Stahlwerksschlacke, die aus dem Sauerstoffkonverter abgezogen wird, hat daher meist einen Kalkgehalt bis zu 50% und einen Freikalkgehalt von bis zu 10%. Dieser hohe Kalkgehalt führt bei Einwirkung von Wasser im Baustoffbereich zu einem meist unerwünschten Schlackenzer fall. Man versucht daher durch eine längere feuchte Lagerpe riode den Schlackenzerfall vor der Verwendung als Baustoff weitgehend zum Abschluß zu bringen.When producing steel, the molten pig iron is increased Lime quantities added to undesired accompanying components in the Slag pig iron. Steel slag from the Oxygen converter is withdrawn, therefore usually has one Lime content up to 50% and a free lime content of up to 10%. This high lime content leads to exposure to water a mostly undesirable slag remover in the building materials sector case. One tries therefore through a longer moist Lagerpe period the slag disintegration before use as a building material largely to complete.
Die Erfindung hat sich die Aufgabe gestellt, diesen unerwünschten Schlackenzerfall zu vermeiden und dabei nach Möglichkeit weitere Abfallprodukte zu verwenden.The invention has the Task given to this undesirable slag decay avoid while adding other waste products if possible use.
Diese Aufgabe kann überraschend einfach dadurch gelöst werden, daß der noch flüssigen Schlacke Gießereialtsand zugemischt wird.This task can be solved surprisingly simply by foundry sand mixed with the still slag becomes.
Gießereialtsand ist ein problematischer Reststoff, der im allgemeinen ca. 80% SiO₂ und 5% Kohle enthält. Dieser Gehalt an Kohle ist beim erfindungsgemäßen Verfahren von Vorteil, da er verbrennt und damit einen Teil der benötigten Schmelzwärme liefert. Foundry sand is a problematic residue, which in the generally contains about 80% SiO₂ and 5% coal. That salary coal is advantageous in the method according to the invention because it burns and thus part of the required heat of fusion delivers.
Die Menge an Gießereialtsand wird so gewählt, daß der Kalkge halt und der Freikalkgehalt der Stahlwerksschlacke weitgehend gebunden wird, und zwar in Form von Tricalciumsilikat. Der Be darf an Gießereialtsand liegt somit bei den üblichen Stahl werksschlacken im Bereich zwischen 3 und 6%.The amount of foundry sand is chosen so that the Kalkge halt and the free lime content of the steelworks slag largely is bound, in the form of tricalcium silicate. The Be may therefore be found on the foundry sand with the usual steel factory slags in the range between 3 and 6%.
Sofern der Gießereialtsand nicht genügend Kohle zur Erzeugung der notwendigen Schmelzwärme enthält, kann bei dem erfindungs gemäßen Verfahren noch zusätzlich eine kohlenstoffreiche Kom ponente zugemischt werden. Da das entstehende Produkt über wiegend aus Tricalciumsilikat besteht, kann die kohlenstoff reiche Komponente ebenfalls verunreinigt sein mit Silikaten. So kann beispielsweise eine kohlenstoffreiche Fraktion von Flugaschen verwendet werden. Derartige Materialien entstehen beispielsweise bei dem Verfahren gemäß der deutschen Patentan meldung der Anmelderin "Verfahren zur Anreicherung und Abtren nung von Kohlenstoffen aus Aschen von Verbrennungsanlagen" (unser Zeichen: 950378de, Aktenzeichen: 195 27 382.6).Unless the foundry sand has enough coal to produce contains the necessary heat of fusion, can be in the Invention according to the method additionally a high-carbon com component are added. Because the resulting product is about Made of tricalcium silicate, the carbon can rich component may also be contaminated with silicates. For example, a high carbon fraction of Fly ash can be used. Such materials are created for example in the method according to the German patent notification by the applicant "Enrichment and Removal Procedures of carbon from ashes from incinerators " (our logo: 950378de, file number: 195 27 382.6).
Es können aber auch andere kohlenstoffhaltige Reststoffe zur Anwendung kommen. Sofern diese dazu neigen, beim Einbringen zu gasen, kann dies die Vermischung der Komponenten beschleuni gen.However, other carbon-containing residues can also be used Application come. Provided that they tend to when inserting gases, this can accelerate the mixing of the components gene.
Die erfindungsgemäß aufbereitete Stahlwerksschlacke kann auf grund ihres hohen Gehaltes an Tricalciumsilikat hervorragend zu Raustoffen verarbeitet werden, ohne daß es dabei zu den gefürchteten Zerfallserscheinungen kommt, wie sie durch Stahl werksschlacke mit hohem Kalkgehalt und hohem Freikalkgehalt stets beobachtet wird.The steelworks slag prepared according to the invention can excellent due to its high content of tricalcium silicate to be processed into raw materials, without it becoming dreaded decay as it comes through steel works slag with high lime content and high free lime content is always observed.
Das erfindungsgemäße Verfahren ist somit in der Lage, zwei problematische Reststoffe von industriellen Verfahren mitein ander zu verwerten und dabei wertvolle Produkte zu erhalten. Bei Zumischung von kohlenstoffreichen Reststoffen ist es sogar möglich, drei und mehr derartige Reststoffe miteinander zu verwerten und dabei veredelte Produkte zu erhalten.The method according to the invention is thus capable of two problematic residues from industrial processes others to use and to get valuable products. With the addition of carbon-rich residues, it is possible three and more such residues together recycle and receive refined products.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995129218 DE19529218A1 (en) | 1995-08-09 | 1995-08-09 | Process for treating lime-contg. steelworks slag - involves adding used foundry sand to form building material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995129218 DE19529218A1 (en) | 1995-08-09 | 1995-08-09 | Process for treating lime-contg. steelworks slag - involves adding used foundry sand to form building material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19529218A1 true DE19529218A1 (en) | 1997-02-13 |
Family
ID=7769043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1995129218 Ceased DE19529218A1 (en) | 1995-08-09 | 1995-08-09 | Process for treating lime-contg. steelworks slag - involves adding used foundry sand to form building material |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19529218A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19800868A1 (en) * | 1998-01-13 | 1999-07-15 | Sicowa Verfahrenstech | Pourable mortar mixture e.g. for producing concrete blocks or cast hollow blocks |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE423535C (en) * | 1924-10-12 | 1926-01-05 | Max Gensbaur | Process for the production of hydraulic binders |
| DE3603879C2 (en) * | 1985-02-21 | 1987-11-12 | Klimanek Gmbh Schlacken - Schrott - Recycling Und Beratung, 6680 Neunkirchen, De | |
| DE3830392A1 (en) * | 1988-09-07 | 1990-03-15 | Huettenwerksanlagen M B H Ges | Process for disposing of pollutant-containing bulk material |
-
1995
- 1995-08-09 DE DE1995129218 patent/DE19529218A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE423535C (en) * | 1924-10-12 | 1926-01-05 | Max Gensbaur | Process for the production of hydraulic binders |
| DE3603879C2 (en) * | 1985-02-21 | 1987-11-12 | Klimanek Gmbh Schlacken - Schrott - Recycling Und Beratung, 6680 Neunkirchen, De | |
| DE3830392A1 (en) * | 1988-09-07 | 1990-03-15 | Huettenwerksanlagen M B H Ges | Process for disposing of pollutant-containing bulk material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19800868A1 (en) * | 1998-01-13 | 1999-07-15 | Sicowa Verfahrenstech | Pourable mortar mixture e.g. for producing concrete blocks or cast hollow blocks |
| DE19800868C2 (en) * | 1998-01-13 | 2000-06-21 | Sicowa Verfahrenstech | Use a pourable mortar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8127 | New person/name/address of the applicant |
Owner name: DSU GESELLSCHAFT FUER DIENSTLEISTUNGEN UND UMWELTT |
|
| 8131 | Rejection |