DE1108604B - Process for the rapid cooling of molten slag, in particular blast furnace slag for the production of cement - Google Patents
Process for the rapid cooling of molten slag, in particular blast furnace slag for the production of cementInfo
- Publication number
- DE1108604B DE1108604B DEE14510A DEE0014510A DE1108604B DE 1108604 B DE1108604 B DE 1108604B DE E14510 A DEE14510 A DE E14510A DE E0014510 A DEE0014510 A DE E0014510A DE 1108604 B DE1108604 B DE 1108604B
- Authority
- DE
- Germany
- Prior art keywords
- slag
- molds
- rapid cooling
- cement
- thermally conductive
- 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.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims description 44
- 238000001816 cooling Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 12
- 239000004568 cement Substances 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 title description 5
- 239000007787 solid Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 150000002843 nonmetals Chemical class 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910018540 Si C Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/04—Specific shape of slag after cooling
- C21B2400/044—Briquettes or moulded bodies other than sheets
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Manufacture Of Iron (AREA)
- Furnace Details (AREA)
Description
Verfahren zur schnellen Abkühlung von schmelzflüssigen Schlacken, insbesondere Hochofenschlacken zur Herstellung von Zement Es ist üblich, für die Herstellung von Zement bestimmte Schlacken, insbesondere Hochofenschlacken, durch unmittelbare Berührung mit Wasser, Wasserdampf und/oder Druckluft mehr oder weniger stark zu zerstäuben und sie auf diese Weise infolge der Oberflächenvergrößerung schnell abzukühlen. Dabei wird ein überwiegend glasiger Erstarrungszustand des Schlackengranulats erreicht, welcher als Voraussetzung für die Erhaltung der latenthydraulischen Eigenschaften gilt. Während dieser Zerstäubung bläht sich die Schlacke auf und bildet ein mehr oder weniger poröses Granulat, dessen Poren mit Wasser gefüllt bleiben. Vor der Weiterverarbeitung zu Zement, d. h. vor der Vermahlung, muß dieses Wasser erst wieder weitgehend beseitigt werden, wozu kostspielige Trocknungsprozesse notwendig sind.Process for the rapid cooling of molten slag, in particular blast furnace slag for the production of cement It is common for the Production of cement by certain slags, in particular blast furnace slags direct contact with water, steam and / or compressed air more or less strongly atomize them in this way as a result of the increase in surface area cool quickly. The slag granulate becomes predominantly glassy achieved, which is a prerequisite for maintaining the latent hydraulic properties is applicable. During this atomization, the slag puffs up and forms one more or less porous granules whose pores remain filled with water. Before the Further processing into cement, d. H. before grinding, this water must first be restored can be largely eliminated, for which costly drying processes are necessary.
Es ist auch bereits seit langer Zeit bekannt, die Schlacke beim Zerstäuben gegen gekühlte Flächen zu schleudern, wobei eine bimssteinariige, größtenteils kristallin und gegebenenfalls zum Teil auch glasig erstarrte Schlacke entsteht; hierbei erfolgt die Abkühlung der Schlacke, indem sich diese über ruhende bzw. bewegte Formen hinwegbewegt, d. h., es findet eine Relativbewegung zwischen den Schlackenteilchen und den gekühlten Erstarrungsflächen statt.It has also been known for a long time that the slag is atomized to be thrown against chilled surfaces, with a pumice-arctic, mostly crystalline and possibly also slag that has solidified in glassy form in part; takes place here the cooling of the slag by moving it over stationary or moving forms, d. that is, there is relative movement between the slag particles and the cooled ones Solidification surfaces instead.
Schließlich ist noch ein Vorschlag bekanntgeworden, gemäß welchem die flüssige Schlacke auf eine sehr große Oberfläche von kühlenden festen Stoffen ausgebreitet wird, auf denen sie ruhend aufliegt. Da hierbei als kühlende feste Stoffe nun aber kleine Stückchen fester Schlacke selbst benutzt werden sollen, erstarrt die auf diese Stückchen fester Schlacke aufgegossene Schlacke zweifelsohne kristallin. Diese Schlacke hat keine latenthydraulischen Eigenschaften, so daß sie nur dadurch für die Erzeugung hydraulischer Bindemittel nutzbar gemacht werden kann, daß sie - gegebenenfalls in Mischung mit weiteren Stoffen - in einem nachgeschalteten Sinterprozeß zu einem Klinker gebrannt wird.Finally, a suggestion has emerged as to which the liquid slag on a very large surface of cooling solids is spread, on which it rests resting. As here as a cooling solid Substances, however, small pieces of solid slag themselves should be used, solidified the slag poured onto these pieces of solid slag is undoubtedly crystalline. This slag has no latent hydraulic properties, so it is only because of this for the production of hydraulic binders can be made available that they - possibly in a mixture with other substances - in a subsequent sintering process is burned to a clinker.
Vor langen Jahrzehnten hat man schon vorgeschlagen, die Schlacke in eine kreisringförmige, sich drehende Gießform lagenweise nacheinander in dünnen Schichten einzugießen, wobei auf die unterste Schicht immer langsamer erkaltende weitere Schichten aufgegossen wurden. Hierbei erstarrt wohl die unterste Schicht glasig, die darüberliegenden Schichten werden jedoch immer mehr kristallin, so daß sich das so hergestellte Endprodukt nicht zur Herstellung von Zement eignet, worüber im übrigen in dieser Vorveröffentlichung auch nichts gesagt ist.Long decades ago it was suggested that the slag in a circular, rotating mold in layers one after the other in thin layers Pour in layers, with the bottom layer cooling down more and more slowly further layers were poured on. The bottom layer probably solidifies here glassy, but the overlying layers become more and more crystalline, so that the end product thus produced is not suitable for the production of cement, about what otherwise nothing is said in this prior publication.
Die Erfindung hat sich nun die Aufgabe gestellt, schmelzfüssige Schlacken, wie insbesondere Hochofenschlacken, ohne Zerstäubung oder Granuherung in glasigen Zustand zu überführen.The invention has now set itself the task of producing molten slags, such as blast furnace slag in particular, without atomization or granulation in glassy Convict state.
Demgemäß besteht die Erfindung darin, daß die Erstarrung der Schlackenschmelze in gut wärmeleitenden festen Formen (Kokillen) in derart geringen, ihrer Neigung zur Unterkühlung angepaßten Querschnitten in der Weise erfolgt, daß die erstarrte und weiterhin schnell abgekühlte Schlacke in ihrer ganzen Masse in überwiegend glasigem Zustand mit latenthydraulischen Eigenschaften in diesen Formen ruhend erkaltet.Accordingly, the invention consists in the solidification of the slag melt in solid forms (chill molds) with good thermal conductivity in such a low inclination for subcooling adapted cross-sections takes place in such a way that the solidified and furthermore rapidly cooled slag in its whole mass in predominantly glassy State with latent hydraulic properties in these forms has cooled dormant.
Von wesentlicher Bedeutung ist dabei, daß die Abkühlung der Schlackenschmelze möglichst weitgehend an den Oberflächen von gut wärmeleitenden festen Körpern, wie Kokillen, so erfolgt, daß die Wärmebeeinflussung der oberflächennahen Querschnittsbereiche durch die später erkaltende Schlacke nicht zu einer nachträglichen Entglasung führt. Vorzugsweise wird die schmelzflüssige Schlacke in weitgehend geschlossene, gut wärmeleitende Formen gegossen, deren innere Oberfläche im Verhältnis zum Schlackenvolumen tunlichst groß ist.It is of essential importance that the cooling of the slag melt as much as possible on the surfaces of solid bodies that conduct heat well, such as Chills, takes place in such a way that the heat influence of the cross-sectional areas near the surface does not lead to subsequent devitrification due to the slag that cools down later. The molten slag is preferably converted into largely closed, highly thermally conductive slag Molds poured, the inner surface of which in relation to the slag volume as far as possible is great.
Für die Kokillen werden Stoffe verwendet, deren Wärmeleitfähigkeit diejenige der Schlacke, insbesondere im Temperaturbereich oberhalb von 700° C, übersteigt.Substances are used for the molds, their thermal conductivity that of the slag, in particular in the temperature range above 700 ° C, exceeds.
Weiterhin erstreckt sich die Erfindung darauf, daß die gut wärmeleitenden Formen in an sich bekannter Weise gekühlt werden. Ferner ist Gegenstand der Erfindung, daß die erstarrte Schlacke nach der schnellen Abkühlung an den gut wärmeleitenden Kokillen zusätzlich unmittelbar mit Wasser gekühlt wird.Furthermore, the invention extends to the fact that the highly thermally conductive Forms are cooled in a known manner. Further is subject the invention that the solidified slag after rapid cooling to the well heat-conducting molds is additionally cooled directly with water.
Als Werkstoff für die gut wärmeleitenden Kokillen kommen Metalle, wie Eisen, Stahl, Kupfer, Aluminium, in Frage. Es können jedoch auch Nichtmetalle, wie z. B. Graphit, Siliziumkarbid (Si C), Karborundum od. dgl., in Anwendung kommen.Metals are used as the material for the molds, which conduct heat well, like iron, steel, copper, aluminum, in question. However, non-metals can also be used such as B. graphite, silicon carbide (Si C), carborundum or the like., Are used.
Es hat sich überraschenderweise gezeigt, daß die Kokillenabschreckung auch in verhältnismäßig dicken Schlackenschichten von mehr als 15 mm bis ins Innere der Schlackenmasse wirksam ist, so daß diese in einen geeigneten glasigen Zustand versetzt wird.It has surprisingly been found that the mold quenching even in relatively thick layers of slag of more than 15 mm to the inside the slag mass is effective, so that it is in a suitable glassy state is moved.
Durch die schnelle Abkühlung werden weiterhin so hohe Spannungen in der erstarrten Masse erzeugt, daß auch die Vermahlbarkeit der überwiegend glasigen Schlacke günstig beeinflußt wird. Schon während der Abkühlung oder beim anschließenden Lagern tritt durch Spannungsauslösung eine weitgehende Zersplitterung der glasigen Schlacke ein.As a result of the rapid cooling, there are still high voltages in the solidified mass produces that also the grindability of the predominantly vitreous Slag is favorably influenced. Already during the cooling down or during the following Storage causes extensive fragmentation of the glassy ones due to the release of voltage Slag a.
Durch das neue Verfahren gemäß der Erfindung kommen die Kosten für die früher notwendige Trocknung der Schlacke völlig in Fortfall, wobei die Vermahlbarkeit keine wesentliche Änderung erfährt. Die latenthydraulischen Eigenschaften der Schlacke werden infolge der glasigen Erstarrung, im Vergleich mit den normalen wassergranulierten Schlacken, nicht ungünstig beeinfiußt.The new method according to the invention brings the costs for the previously necessary drying of the slag is completely eliminated, whereby the grindability undergoes no significant change. The latent hydraulic properties of the slag are due to the glassy solidification, in comparison with the normal water-granulated Slag, not adversely affected.
Ein bemerkenswerter Vorteil des neuen Verfahrens liegt auch darin, daß die von den Kokillen aufgenommene Schlackenwärme energetisch nutzbar gemacht werden kann.Another notable advantage of the new process is that that the slag heat absorbed by the molds made energetically usable can be.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE14510A DE1108604B (en) | 1957-08-08 | 1957-08-08 | Process for the rapid cooling of molten slag, in particular blast furnace slag for the production of cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE14510A DE1108604B (en) | 1957-08-08 | 1957-08-08 | Process for the rapid cooling of molten slag, in particular blast furnace slag for the production of cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1108604B true DE1108604B (en) | 1961-06-08 |
Family
ID=7068818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEE14510A Pending DE1108604B (en) | 1957-08-08 | 1957-08-08 | Process for the rapid cooling of molten slag, in particular blast furnace slag for the production of cement |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1108604B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0194997A1 (en) * | 1985-03-15 | 1986-09-17 | VOEST-ALPINE Aktiengesellschaft | Arrangement for the production of vitrified slag |
| EP1454995A2 (en) * | 2003-03-04 | 2004-09-08 | Anton Dipl.-Ing. Hulek | Method and device for fast and dry cooling of metallurgical slags, irrespective of furncace-type or scale |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE186812C (en) * | ||||
| DE292841C (en) * | ||||
| DE167526C (en) * | 1900-01-01 |
-
1957
- 1957-08-08 DE DEE14510A patent/DE1108604B/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE186812C (en) * | ||||
| DE292841C (en) * | ||||
| DE167526C (en) * | 1900-01-01 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0194997A1 (en) * | 1985-03-15 | 1986-09-17 | VOEST-ALPINE Aktiengesellschaft | Arrangement for the production of vitrified slag |
| EP1454995A2 (en) * | 2003-03-04 | 2004-09-08 | Anton Dipl.-Ing. Hulek | Method and device for fast and dry cooling of metallurgical slags, irrespective of furncace-type or scale |
| EP1454995A3 (en) * | 2003-03-04 | 2007-08-22 | Anton Dipl.-Ing. Hulek | Method and device for fast and dry cooling of metallurgical slags, irrespective of furncace-type or scale |
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