EP0316411A1 - Coke oven cover. - Google Patents

Coke oven cover.

Info

Publication number
EP0316411A1
EP0316411A1 EP88904958A EP88904958A EP0316411A1 EP 0316411 A1 EP0316411 A1 EP 0316411A1 EP 88904958 A EP88904958 A EP 88904958A EP 88904958 A EP88904958 A EP 88904958A EP 0316411 A1 EP0316411 A1 EP 0316411A1
Authority
EP
European Patent Office
Prior art keywords
coke oven
layer
blanket according
refractory
concrete
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
EP88904958A
Other languages
German (de)
French (fr)
Other versions
EP0316411B1 (en
Inventor
Dieter Breidenbach
Hans Oldengott
Burckard Vitt
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.)
RAG AG
Original Assignee
Ruhrkohle AG
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 Ruhrkohle AG filed Critical Ruhrkohle AG
Publication of EP0316411A1 publication Critical patent/EP0316411A1/en
Application granted granted Critical
Publication of EP0316411B1 publication Critical patent/EP0316411B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B29/00—Other details of coke ovens
    • C10B29/02—Brickwork, e.g. casings, linings, walls

Definitions

  • the invention relates to a coke oven blanket made of several layers of refractory material.
  • Usual coke oven ceilings consist of several layers of refractory bricks. The following structure often occurs: Underneath silica for stones, above fireclay normal stones, above fire light normal stones, above insulating normal stones.
  • the top layer of the furnace roof is formed by red tiles.
  • the production of the refractory bricks is very complex. This is largely influenced by the fact that there are many special forms.
  • the invention is therefore based on the object of reducing the structural outlay for the production of furnace ceilings. According to the invention, this is achieved in that, as far as possible, unshaped refractory masses, in particular refractory concrete, are used instead of refractory bricks.
  • Refractory masses are masses that withstand temperatures of 1500 C to 1700 C. This differs from fire-resistant materials (up to 1500 ° C) and high-fire-resistant materials (from 1700 ° C).
  • Refractory concretes are unshaped masses with a cement-hydraulic bond, which may be converted into a ceramic bond at higher temperatures.
  • the refractory concretes can be introduced as ramming compounds. The ramming compounds advantageously make the production of special shapes unnecessary.
  • the refractory concretes are preferably used between the firebrick layer and the uppermost stone layer of the kiln ceiling. Surprisingly, it turns out that the temperature in the kiln ceiling is lower than with comparable kiln ceilings made of refractory bricks. In addition, the furnace ceilings with the refractory concrete layers prove to be very tight against gas penetration. Further advantageous embodiments of the coke oven blanket according to the invention result from the features of the subclaims.
  • FIG. 1 It is a sectional view transverse to the longitudinal direction of the furnace, 1 denoting the furnace space of a coke oven, which is enclosed on both sides by side walls and at the top by an oven ceiling.
  • the oven has a width of 390 to 430 mm.
  • Silica shaped bricks 2 are provided at the bottom of the furnace ceiling.
  • the silica stones are refractory bricks and form a layer with a height of 220 mm in the exemplary embodiment.
  • Fireclay normals are a 3 above the silica bricks.
  • the fireclay normal bricks are again refractory bricks. In contrast to a conventional furnace ceiling with two layers of firebricks, only one layer of firebricks 3 is provided.
  • the refractory bricks made of firebricks are 70 mm thick.
  • the top of the furnace is closed by a red brick layer 7.
  • the red brick layer is also referred to as the brick roll layer.
  • red brick layer 7 which has a conventional thickness of 130 mm
  • firebrick layer 3 the following structure being obtained from bottom to top:
  • the lower layer of lightweight lightweight concrete is 200 mm thick and 4, the upper is 100 mm thick and labeled 6. In between is the insulating concrete layer 5 with a thickness of 250 mm.
  • the lightweight fire concrete layer has the following specification:
  • the insulating concrete layer has the following specification:
  • An expansion joint of 10 mm is provided between the refractory concrete area and the other refractory bricks.
  • the expansion joint is filled with a silicate fiber material (3/4 inch ceramic felt) and can be replanted if gas escapes.
  • the silicate layer is designated 8.
  • there is a metal foil 9 in the horizontal region of the expansion joint in the exemplary embodiment a 0.3 mm thick aluminum foil.
  • Such an expansion joint ensures that no expansion damage occurs when the masonry is heated.
  • the aluminum foil has a considerable insulating effect and sealing effect against gas penetration.
  • the furnace walls are set up normally and the chamber cover stones are inserted as usual.
  • the chamotte normal stone layer 3 is placed over it.
  • the small heating walls consist of firebrick or prefabricated components.
  • the refractory concretes are applied in layers in the free fields between the filling-hole shafts and head mirrors in the direction of the chamber axis and the heating walls in the direction of the battery axis. This is done by stamping the masses.
  • the lower layer of light lightweight concrete 4 is placed at a heating temperature of approx. 55 ° C.
  • the insulating concrete 5 and the top layer of lightweight lightweight concrete 6 are placed at a heating temperature of approx. 900 ° C. All refractory concrete layers are kept moist for at least 30 hours after introduction. The temperatures and the other parameters of the insertion are largely determined by the expansion behavior of the silica material used in the substructure.
  • the furnace roof is closed by inserting the brick roll layer.
  • the installation of the ceiling according to the invention results in a saving of approximately 50% of the costs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

On fabrique des couvercles pour fours à coke au moins partiellement en béton réfractaire.Lids for coke ovens at least partially are made of refractory concrete.

Description

Koksofendecke Coke oven blanket
Die Erfindung betrifft eine Koksofendecke aus mehreren Schichten feuerfesten Materials. Übliche Koksofendecken bestehen aus mehreren Schichten von Feuerfeststeinen. Dabei kommt häufig folgender Aufbau vor: Zuunters Silikafor steine, darüber Schamotte-Normalsteine, darüber Feuerleicht-Normalsteine, darüber Isolier-Normalsteine. Die oberste Lage der Ofendecke wird durch Rotziegel gebildet.The invention relates to a coke oven blanket made of several layers of refractory material. Usual coke oven ceilings consist of several layers of refractory bricks. The following structure often occurs: Underneath silica for stones, above fireclay normal stones, above fire light normal stones, above insulating normal stones. The top layer of the furnace roof is formed by red tiles.
Die Herstellung der Feuerfeststeine ist sehr aufwendig. Das wird wesentlich dadurch beeinflußt, daß viele Sonderformen vorkommen.The production of the refractory bricks is very complex. This is largely influenced by the fact that there are many special forms.
Der Erfindung liegt daher die Aufgabe zugrunde, den baulichen Aufwand für die Herstellung von Ofendecken zu verringern. Nach der Erfindung wird das dadurch erreicht, daß anstelle von Feuerfeststeinen - soweit als möglich - ungeformte feuerfeste Massen, insbesonder Feuerbetone eingesetzt werden. Feuerfeste Massen sind Massen, die Temperaturen von 1500 C bis 1700 C stand¬ halten. Davon unterscheiden sich feuerbeständige Massen (bis 1500 °C) und hochfeuerfeste Massen (ab 1700° C) . Feuerbetone sind ungeformte Massen mit Zement - hydraulischer Bindung, die ggf. bei höheren Tempera¬ turen in eine keramische Bindung übergeht. Die Feuer¬ betone können als Stampfmassen eingebracht werden. Die Stampfmassen machen vorteilhafterweise die Fertigung von Sonderformen entbehrlich.The invention is therefore based on the object of reducing the structural outlay for the production of furnace ceilings. According to the invention, this is achieved in that, as far as possible, unshaped refractory masses, in particular refractory concrete, are used instead of refractory bricks. Refractory masses are masses that withstand temperatures of 1500 C to 1700 C. This differs from fire-resistant materials (up to 1500 ° C) and high-fire-resistant materials (from 1700 ° C). Refractory concretes are unshaped masses with a cement-hydraulic bond, which may be converted into a ceramic bond at higher temperatures. The refractory concretes can be introduced as ramming compounds. The ramming compounds advantageously make the production of special shapes unnecessary.
Die Feuerbetone finden vorzugsweise zwischen der Schamottesteinschicht und der obersten Steinschicht der Ofendecke Anwendung, überraschenderweise zeigt sich dabei, daß die Temperatur in der Ofendecke geringer als bei vergleichbaren Ofendecken aus Feuer¬ feststeinen ist. Außerdem erweisen sich die Ofendecken mit den Feuerbetonschichten als sehr dicht gegen Gasdurchtritt. Weitere vorteilhafte Ausführungen der erfindungsge¬ mäßen Koksofendecke ergeben sich aus den Merkmalen der Unteransprüche.The refractory concretes are preferably used between the firebrick layer and the uppermost stone layer of the kiln ceiling. Surprisingly, it turns out that the temperature in the kiln ceiling is lower than with comparable kiln ceilings made of refractory bricks. In addition, the furnace ceilings with the refractory concrete layers prove to be very tight against gas penetration. Further advantageous embodiments of the coke oven blanket according to the invention result from the features of the subclaims.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. -In the drawing, an embodiment of the invention is shown. -
Es handelt sich um eine Schnittdarstellung quer zur Ofenlängsrichtung, wobei mit 1 der Ofenraum eines Koksofens bezeichnet ist, der beiderseits durch Seitenwände und oben durch eine Ofendecke einge¬ schlossen ist. Der Ofen hat eine Breite von 390 bis 430 mm. Zuunterst in der Ofendecke sind Silikaform- steine 2 vorgesehen. Die Silikasteine sind Feuer¬ feststeine und bilden eine Schicht von im Ausführungs¬ beispiel 220 mm Höhe. Über den Silikasteinen liegen Schamotte-Normals eine 3. Die Schamotte-Normalsteine sind wiederum Feuerfeststeine. Im Unterschied zu einer herkömmlichen Ofendecke mit zwei Lagen Schamottesteinen ist jedoch nur eine Lage Schamottesteine 3 vorgesehen. Die Dicke der Feuerfeststeine aus Schamottesteine beträgt 70 mm.It is a sectional view transverse to the longitudinal direction of the furnace, 1 denoting the furnace space of a coke oven, which is enclosed on both sides by side walls and at the top by an oven ceiling. The oven has a width of 390 to 430 mm. Silica shaped bricks 2 are provided at the bottom of the furnace ceiling. The silica stones are refractory bricks and form a layer with a height of 220 mm in the exemplary embodiment. Fireclay normals are a 3 above the silica bricks. The fireclay normal bricks are again refractory bricks. In contrast to a conventional furnace ceiling with two layers of firebricks, only one layer of firebricks 3 is provided. The refractory bricks made of firebricks are 70 mm thick.
Die Ofendecke wird oben durch eine Rotziegelschicht 7 abgeschlossen. Die Rotziegelschicht wird auch als Ziegelrollschicht bezeichnet.The top of the furnace is closed by a red brick layer 7. The red brick layer is also referred to as the brick roll layer.
Zwischen der Rotziegelschicht 7, die eine herkömmliche Dicke von 130 mm aufweist und der Schamottesteine¬ schicht 3 sind verschiedene Feuerbetonschichten vorgesehen, wobei sich von unten nach oben folgender Aufbau ergibt:Various refractory concrete layers are provided between the red brick layer 7, which has a conventional thickness of 130 mm, and the firebrick layer 3, the following structure being obtained from bottom to top:
Feuerleichtbeton, Isolierbeton, Feuerleichtbeton.Lightweight concrete, insulating concrete, lightweight concrete.
Die untere Feuerleichtbetonschicht ist 200 mm dick und mit 4, die obere ist 100 mm dick und mit 6 bezeichnet. Dazwischen befindet sich die Isolierbetonschicht 5 von 250 mm Dicke. — Die Feuerleichtbetonschicht hat folgende Spezifikation:The lower layer of lightweight lightweight concrete is 200 mm thick and 4, the upper is 100 mm thick and labeled 6. In between is the insulating concrete layer 5 with a thickness of 250 mm. - The lightweight fire concrete layer has the following specification:
A1„0 Gehalt: 26.6 %A1 „0 salary: 26.6%
SiO„ Gehalt: 45.7 %SiO "content: 45.7%
FEo0,, Gehalt: 8,7 % 23FE o 0 ,, content: 8.7% 23
Kaltbiegefestigkeit. 1000°C 17 kp/cm2 b. Vorbrand 1100°C 26 kp/cm2 Cold bending strength. 1000 ° C 17 kp / cm 2 b. Pre-firing 1100 ° C 26 kp / cm 2
Wärmeleitfähigkeit: bei 600°C 0,41 kcal/mh°CThermal conductivity: at 600 ° C 0.41 kcal / mh ° C
800υC 0,40 1000°C 0,43800 υ C 0.40 1000 ° C 0.43
Feuerfestigkeit: SK 8 1295 °CFire resistance: SK 8 1295 ° C
max. Anwendungstemperatur; 1100υCMax. Application temperature; 1100 υ C.
Die Isolierbetonschicht hat folgende Spezifikation:The insulating concrete layer has the following specification:
A1203 Gehalt: 26, ,8 %A1 2 0 3 Salary: 26.8%
SiO. Gehalt: 33, ,2 %SiO. Salary: 33.2%
FE203 Gehalt: 11, ,9 %FE 2 0 3 content: 11.9%
Kaltdruckfestigkeit: 10 kp/cm b. Vorbrand 110 °cCold compressive strength: 10 kp / cm b. Pre-firing 110 ° c
Wärmeleitfähigkeit bei 400° C: 0,15 kcal/ h °CThermal conductivity at 400 ° C: 0.15 kcal / h ° C
600υC: 0,17 800°C: 0,19600 υ C: 0.17 800 ° C: 0.19
Feuerfestigkeit: SK 7 1270υCFire resistance: SK 7 1270 υ C.
max. Anwendungstemperatur: 1020UC Zwischen dem Feuerbetonbereich und den übrigen Feuer¬ feststeinen ist eine Dehnfuge von 10 mm vorgesehen. Die Dehnfuge ist mit einem silikatischen Faserstoff (Keramikfilz 3/4 Zoll) ausgefüllt und kann bei Gasaustritt nachgestopft werden. Die silikatische Schicht ist mit 8 bezeichnet. Darüber hinaus befindet sich im horizontalen Bereich der Dehnfuge eine Metall¬ folie 9, im Ausführungsbeispiel eine 0,3 mm dicke Aluminiumfolie. Eine solche Dehnfuge gewährleistet, daß beim Aufheizen des Mauerwerks keine Dehnungs- schäden entstehen. Darüber hinaus geht von der Aluminiumfolie eine beträchtliche Isolierungswirkung und Abdichtungswirkung gegen Gasdurchtritt aus.Max. Application temperature: 1020 U C An expansion joint of 10 mm is provided between the refractory concrete area and the other refractory bricks. The expansion joint is filled with a silicate fiber material (3/4 inch ceramic felt) and can be replanted if gas escapes. The silicate layer is designated 8. In addition, there is a metal foil 9 in the horizontal region of the expansion joint, in the exemplary embodiment a 0.3 mm thick aluminum foil. Such an expansion joint ensures that no expansion damage occurs when the masonry is heated. In addition, the aluminum foil has a considerable insulating effect and sealing effect against gas penetration.
Bei der Montage werden die Ofenwände normal aufgebaut und die Kammerabdecksteine wie gewohnt eingelegt. Darüber wird die Schamotte-Normalsteinlage 3 gelegt. Die kleinen Heizwände (Schaulochkanalwände) bestehen aus Schamotteformstein oder aus Fertigbauteilen. In die freien Felder zwischen den Füll-Loch-Schächten und Kopfspiegeln in Richtung der Kammerachse und den Heiz¬ wänden in Richtung der Batterieachse werden die Feuerbetone lagenweise aufgebracht. Das erfolgt durch Einstampfen der Massen. Die untere Lage Feuerleicht¬ beton 4 wird bei einer Aufheiztemperatur von ca. 55 C eingebracht. Während der Isolierbeton 5 und die obere Lage Feuerleichtbeton 6 bei einer Aufheiztemperatur von ca. 900°C eingebracht werden. Alle Feuerbeton¬ schichten werden nach dem Einbringen mindestens 30 Stunden feucht gehalten. Die Temperaturen und die übrigen Parameter des Einbringens werden maßgeblich durch das Dehnungsverhalten des eingesetzten Silika- materials im Unterbau bestimmt.During assembly, the furnace walls are set up normally and the chamber cover stones are inserted as usual. The chamotte normal stone layer 3 is placed over it. The small heating walls (inspection hole walls) consist of firebrick or prefabricated components. The refractory concretes are applied in layers in the free fields between the filling-hole shafts and head mirrors in the direction of the chamber axis and the heating walls in the direction of the battery axis. This is done by stamping the masses. The lower layer of light lightweight concrete 4 is placed at a heating temperature of approx. 55 ° C. While the insulating concrete 5 and the top layer of lightweight lightweight concrete 6 are placed at a heating temperature of approx. 900 ° C. All refractory concrete layers are kept moist for at least 30 hours after introduction. The temperatures and the other parameters of the insertion are largely determined by the expansion behavior of the silica material used in the substructure.
Kurz vor dem ersten Füllen der Kammern wird die Ofendecke durch das Einlegen der Ziegelrollschicht geschlossen.Shortly before the chambers are filled for the first time, the furnace roof is closed by inserting the brick roll layer.
eRSAT Gegenüber einer herkömmlich gemauerten Decke ergibt sich bei der Montage der erfindungsgemäßen Decke eine Einsparung von etwa 50 % der Kosten. Darüber hinaus ergibt sich eine deutlich niedrigere Temperatur in- der Ofendecke und an der Oberfläche der Ofendecke. eRS AT Compared to a conventionally brick ceiling, the installation of the ceiling according to the invention results in a saving of approximately 50% of the costs. In addition, there is a significantly lower temperature in the furnace ceiling and on the surface of the furnace ceiling.
ERSATZBLATT REPLACEMENT LEAF

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Koksofendecke aus mehreren Schichten feuerfesten Materials, dadurch gekennzeichnet, daß oberhalb einer die Ofenkammer abdeckenden, aus feuerfesten Steinen bestehenden Schicht (2, 3) eine Schicht aus ungeformten Feuerfestmassen vorgesehen ist.1. Coke oven cover made of several layers of refractory material, characterized in that a layer of unshaped refractory materials is provided above a layer (2, 3) covering the furnace chamber and made of refractory stones.
2. Koksofendecke nach Anspruch 1, dadurch gekenn¬ zeichnet, daß eine Feuerbetonschicht (4, 5, 6) vorgesehen ist.2. Coke oven blanket according to claim 1, characterized gekenn¬ characterized in that a refractory concrete layer (4, 5, 6) is provided.
3. Koksofendecke nach Anspruch 2, dadurch gekenn¬ zeichnet, daß der Feuerbeton einen Gehalt an A^Qj von 25 bis 28 %, einen Gehalt von SIO von 30 bis3. coke oven blanket according to claim 2, characterized gekenn¬ characterized in that the refractory concrete has a content of A ^ Q j from 25 to 28%, a content of SIO from 30 to
50 % und einen Gehalt von Fe„0, von 8 - 12 %50% and a content of Fe "0, from 8 - 12%
2 3 aufweist.2 3 has.
4. Koksofendecke nach Anspruch 2 oder 3, gekenn¬ zeichnet durch verschiedene übereinander ange¬ ordnete Feuerbetonschichten mit unterschiedlichen Dichten und Wärmeleitfähigkeiten.4. coke oven blanket according to claim 2 or 3, gekenn¬ characterized by different superimposed refractory concrete layers with different densities and thermal conductivities.
5. Koksofendecke nach Anspruch 4, dadurch gekenn¬ zeichnet, daß eine untere Feuerbetonschicht (4) aus Feuerleichtbeton sowie eine obere Feuerbeton¬ schicht aus Feuerleichtbeton (6) vorgesehen sind und dazwischen eine Schicht aus Isolierbeton (5) angeordnet ist.5. coke oven blanket according to claim 4, characterized gekenn¬ characterized in that a lower refractory concrete layer (4) made of lightweight fire concrete and an upper Feuerbeton¬ layer of lightweight lightweight concrete (6) are provided and in between a layer of insulating concrete (5) is arranged.
6. Koksofendecke nach einem oder mehreren der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß zwischen der Feuerbetonschicht und den Feuerfest¬ steinen eine Dehnfuge vorgesehen ist.6. coke oven blanket according to one or more of claims 2 to 5, characterized in that an expansion joint is provided between the refractory concrete layer and the refractory bricks.
ERSATZBLATT _η_REPLACEMENT LEAF _ η _
7. Koksofendecke nach Anspruch 6, dadurch gekenn¬ zeichnet, daß die Dehnfuge mit einer Schicht (8) aus silikatischen Faserstoff gefüllt ist.7. coke oven blanket according to claim 6, characterized gekenn¬ characterized in that the expansion joint is filled with a layer (8) of silicate fiber.
8. Koksofendecke nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß in der Dehnfuge eine Metall¬ folie (9) vorgesehen ist.8. coke oven blanket according to claim 6 or 7, characterized in that a metal foil (9) is provided in the expansion joint.
9. Koksofendecke nach Anspruch 8, dadurch gekenn¬ zeichnet, daß die Metallfolie (9,) aus Aluminium besteht.9. coke oven blanket according to claim 8, characterized gekenn¬ characterized in that the metal foil (9,) consists of aluminum.
10. Koksofendecke nach einem oder mehreren der Ansprüche 2 bis 9, dadurch gekennzeichnet, daß das Einbringen und die Nachbehandlung der ver¬ schiedenen Feuerbetonschichten entsprechend den Heizzugtemperaturen erfolgt.10. Coke oven blanket according to one or more of claims 2 to 9, characterized in that the introduction and the aftertreatment of the various layers of refractory concrete take place in accordance with the heating train temperatures.
11. Koksofendecke nach Anspruch 10, dadurch gekenn¬ zeichnet, daß die untere Feuerleichtbetonschicht ( (44)) bbeeii eeiinneerr AAuuff!heiztemperatur von 50 bis 60 C eingestampft wird.11. coke oven blanket according to claim 10, characterized gekenn¬ characterized in that the lower lightweight concrete layer ((44)) bbeeii eeiinneerr AAuuff! Heating temperature of 50 to 60 C is stamped.
12. Koksofendecke nach Anspruch 10, dadurch gekenn¬ zeichnet, daß die obere Lage der Feuerleichtbe¬ tonschicht und/oder die zwischenliegende Isolier¬ betonschicht (5) bei einer Temperatur von 850 bis 950°C eingestampft wird.12. Coke oven blanket according to claim 10, characterized gekenn¬ characterized in that the upper layer of Feuerleichbe¬¬ layer and / or the intermediate insulating concrete layer (5) is rammed at a temperature of 850 to 950 ° C.
13. Koksofendecke nach einem oder mehreren der Ansprüche 10 bis 12, dadurch gekennzeichnet, daß die Ofendecke kurz vor dem ersten Füllen durch Einlegen der Rotziegelschicht (7) geschlossen wird. 13. Coke oven blanket according to one or more of claims 10 to 12, characterized in that the oven blanket is closed shortly before the first filling by inserting the red brick layer (7).
EP88904958A 1987-05-21 1988-05-24 Coke oven cover Expired - Lifetime EP0316411B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3717015 1987-05-21
DE3717015 1987-05-21

Publications (2)

Publication Number Publication Date
EP0316411A1 true EP0316411A1 (en) 1989-05-24
EP0316411B1 EP0316411B1 (en) 1991-07-10

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Family Applications (1)

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US (2) US4929179A (en)
EP (1) EP0316411B1 (en)
DE (2) DE3816396A1 (en)
WO (1) WO1988009361A1 (en)

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DE3863627D1 (en) 1991-08-14
DE3816396C2 (en) 1989-08-10
EP0316411B1 (en) 1991-07-10
US4929179A (en) 1990-05-29
US5155966A (en) 1992-10-20
WO1988009361A1 (en) 1988-12-01
DE3816396A1 (en) 1989-03-02

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