LU85508A1 - PROCESS OF PARTIAL PURIFICATION OF POLLUTED WATER - Google Patents
PROCESS OF PARTIAL PURIFICATION OF POLLUTED WATER Download PDFInfo
- Publication number
- LU85508A1 LU85508A1 LU85508A LU85508A LU85508A1 LU 85508 A1 LU85508 A1 LU 85508A1 LU 85508 A LU85508 A LU 85508A LU 85508 A LU85508 A LU 85508A LU 85508 A1 LU85508 A1 LU 85508A1
- Authority
- LU
- Luxembourg
- Prior art keywords
- water
- slag
- filtration
- hopper
- granulation device
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 46
- 238000000034 method Methods 0.000 title claims description 12
- 238000000746 purification Methods 0.000 title claims description 8
- 230000008569 process Effects 0.000 title claims description 6
- 239000002893 slag Substances 0.000 claims description 27
- 238000005469 granulation Methods 0.000 claims description 22
- 230000003179 granulation Effects 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 150000003464 sulfur compounds Chemical class 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- C21B3/08—Cooling slag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/02—Fluid flow conditions
- C02F2301/028—Tortuous
-
- 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
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/032—Separating slag from liquid, e.g. from water, after quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising 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
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/074—Tower structures for cooling, being confined but not sealed
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
-1--1-
Procédê d'épuration partielle d'eaux polluées.Partial purification process for polluted water.
La présente invention concerne un procédé d'épuration partielle d'eaux polluées, notamment des eaux en provenance d'une installation d'épuration de gaz bruts d'un haut fourneau, qui est équipé, entre autres, d'une 5 installation de traitement de laitier, cette installation étant du type décrit dans le brevet luxembourgeois No 79 466 comprenant un dispositif de granulation à eau et un tambour de filtration pour séparer le laitier gra- % nulë de l'eau de filtration qui est récupérée dans une 10 trémie sous-jacente.The present invention relates to a process for the partial purification of polluted water, in particular water from a raw gas purification installation of a blast furnace, which is equipped, inter alia, with a treatment installation slag, this installation being of the type described in Luxembourg patent No 79 466 comprising a water granulation device and a filtration drum for separating the non-slag slag from the filtration water which is recovered in a hopper under - adjacent.
Les réglementations visant à défendre l'environnement imposent, dans certains cas, aux sidérurgistes l'installation d'équipements onéreux de traitement d'eaux polluées, notamment des eaux polluées formant les résidus 15 des installations de nettoyage des gaz bruts de hauts fourneaux et dont le degré de pollution dépasse les limites tolérées. En plus des installations d'épuration proprement dites,il est nécessaire de prévoir des équipements auxiliaires, également relativement onéreux, tels que conduites, 20 pompes, etc..Regulations aimed at protecting the environment impose, in certain cases, on steelmakers to install expensive equipment for treating polluted water, in particular polluted water forming residues 15 from cleaning installations for raw gases from blast furnaces and whose the degree of pollution exceeds the tolerated limits. In addition to the purification plants themselves, it is necessary to provide auxiliary equipment, also relatively expensive, such as pipes, pumps, etc.
La présente invention vise à la création d'un nouveau procédé de dëpollution des eaux sales, qui est beaucoup plus économique que les procédés connus, et qui, à cet effet, ne nécessite que très peu d'équipements 25 spéciaux supplémentaires à ceux qui se trouvent de toute façon déjà aux alentours d'un haut fourneau.The present invention aims to create a new method for cleaning up dirty water, which is much more economical than known methods, and which, for this purpose, requires very little additional special equipment to those who anyway already found around a blast furnace.
Selon la présente invention, ce but est atteint par un procédé qui est caractérisé en ce que l'eau polluée est recueilli dans un réservoir intermédiaire à partir 30 duquel elle est dirigée, en quantités dosées,vers le dispositif de granulation pour être projetée sur le laitier en fusion, en ce que l'on injecte des additifs chimiques sur la vapeur émise: pour précipiter certains composants nocifs en ce que l'on augmente le pH de la pulpe, en ce eue l'on 35 provoque la précipitation de certains métaux lourds et de composés la base de soufre dans le but de les inclure, en -2- partie, dans les particules de laitier en cours de solidification et , en partie, les recueillir, par filtration de la pulpe à travers les dépôts de laitier, en ce que l'on recueille l'eau de filtration dans une trémie de dé-5 cantation, en ce que l'on recycle, à partir de cette trémie, une partie de l'eau avec les dépôts vers le dispositif de granulation, en ce que l'on envoie l'eau décantée de la trémie de décantation vers un bac de décantation duquel on retire l'eau avec un degré de pollu-10 tion suffisamment faible.According to the present invention, this object is achieved by a process which is characterized in that the polluted water is collected in an intermediate tank from which it is directed, in metered quantities, to the granulation device to be projected onto the molten slag, in that chemical additives are injected into the vapor emitted: in order to precipitate certain harmful components in that the pH of the pulp is increased, in this case the precipitation of certain metals is caused heavy and sulfur base compounds in order to include them, in part, in the slag particles in the course of solidification and, in part, to collect them, by filtration of the pulp through the slag deposits, in that the filtration water is collected in a discharge hopper, in that one recycles, from this hopper, part of the water with the deposits towards the granulation device, in that we send the decanted water from the decantate hopper ion to a settling tank from which water is removed with a sufficiently low degree of pollution.
Si nécessaire on peut provoquer une précipitation supplémentaire par traitement chimique dans le bac de décantation.If necessary, additional precipitation can be caused by chemical treatment in the settling tank.
Autrement dit, la présente invention permet 15 de profiter de la présence d'une installation de granulation et de filtration du laitier telle qu'elle, c'est-à-dire, sans transformation ou seulement avec peu d'équipement supplémentaire, pour assurer une dépollution suffisante des eaux sales. Bien sûr, le procédé ne permet pas d'obtenir 20 de l'eau propre à partir de l'eau polluée, mais elle permet de réduire le degré de pollution jusqu'en dessous des limites tolérées par les réglementations en vigueur.In other words, the present invention makes it possible to take advantage of the presence of a slag granulation and filtration installation such as it is, that is to say, without transformation or only with little additional equipment, to ensure a sufficient depollution of dirty water. Of course, the method does not make it possible to obtain clean water from polluted water, but it makes it possible to reduce the degree of pollution to below the limits tolerated by the regulations in force.
D'autres particularités et caractéristiques ressortiront de la description détaillée d'un mode de 25 mise en oeuvre présenté, ci-dessous, à titre d'illustration, en référence à la figure unique qui montre schématiquement une installation de granulation et d'épuration avec la mise en oeuvre du procédé selon l'invention.Other particularities and characteristics will emerge from the detailed description of an embodiment presented below, by way of illustration, with reference to the single figure which schematically shows a granulation and purification installation with the implementation of the method according to the invention.
L'installation de traitement et de granulation 30 de laitier est du genre décrit dans le brevet luxembourgeois * No 79 466 et comporte un dispositif de granulation 10 dans lequel le laitier en fusion en provenance d'un haut fourneau, est amené à travers une rigole 12. Dans ce dispositif de granulation 10 le laitier en fusion subit 35 l'action de jets c'eau froide qui provoquent sa solidification. La pulpe 14 constituée d'un mélange d'eau et de particules de laitier plus ou moins solidifiées s'écoule ensuite • » -3- par une rampe inclinée 16 dans un canal de distribution 18 qui débouche à l'intérieur d'un tambour de filtration 20. Dans ce tambour 20 a lieu la séparation encre les ’ particules de laitier solidifié et l'eau de granulation.The slag treatment and granulation installation 30 is of the type described in Luxembourg patent * No 79 466 and comprises a granulation device 10 in which the molten slag from a blast furnace is brought through a channel 12. In this granulation device 10 the molten slag is subjected to the action of jets of cold water which cause it to solidify. The pulp 14 consisting of a mixture of water and more or less solidified slag particles then flows • "-3- through an inclined ramp 16 in a distribution channel 18 which opens out inside a drum filtration 20. In this drum 20 takes place the ink separation of the solidified slag particles and the granulation water.
5 Le laitier granulé est évacué au moyen d'une bande transporteuse 22, tandis que l'eau de granulation filtrée est recueillie dans une trémie de décantation 24. Les ' particules solides appelées "fines" non retenues dans le dispositif de filtration à tambour se déposent en partie 10 dans la trémie 24 et sont recyclées avec l'eau de filtration à travers une conduite 26 vers le dispositif de granulation 10.The granulated slag is discharged by means of a conveyor belt 22, while the filtered granulation water is collected in a settling hopper 24. The "solid particles called" fines "not retained in the drum filtration device partially deposit 10 in the hopper 24 and are recycled with the filtration water through a pipe 26 to the granulation device 10.
Une hotte 28 surmonte le tambour de filtration 20 et le dispositif de granulation 10 pour recueillir les 15 vapeurs et fumées issues de la granulation. L'excès d'eau recueilli par décantation de la trémie 24 peut, si elle n'est pas encore suffisamment propre, être envoyée dans un bac de décantation à chicanes 30.A hood 28 overcomes the filtration drum 20 and the granulation device 10 to collect the vapors and fumes from the granulation. The excess water collected by decantation of the hopper 24 can, if it is not yet sufficiently clean, be sent to a baffle settling tank 30.
Conformément à la présente invention on profite 20 de la présence de cette installation de granulation et de filtration du laitier pour envoyer dans le circuit de l'eau polluée formant le résidus de l'installation d'épuration des gaz bruts de hauts fourneaux. Cette eau polluée est recueillie dans un réservoir intermédiaire 32 à partir 25 duquel elle ;est envoyée en quantités nécessaires vers le dispositif de granulation 10. Dans ce dispositif de granulation 10 l'eau polluée est mélangée au laitier en fusion et à l'eau de granulation recyclée 26.In accordance with the present invention, advantage is taken of the presence of this slag granulation and filtration installation to send in the polluted water circuit forming the residues of the installation for purifying raw gases from blast furnaces. This polluted water is collected in an intermediate tank 32 from which it is sent in necessary quantities to the granulation device 10. In this granulation device 10 the polluted water is mixed with the molten slag and recycled granulation 26.
Au contact du laitier en fusion à environ 1500° 30 une bonne partie de l'eau polluée et de l'eau recyclée v ' s'évapore et les vapeurs sont recueillies par la hotte 28.In contact with the molten slag at approximately 1500 ° 30 a good part of the polluted water and of the recycled water v 'evaporates and the vapors are collected by the hood 28.
En vue de la mise en oeuvre du procédé selon l'invention, on a prévu dans la hotte 28 des gicleurs 34 35 alimentés d'un réservoir 36 en substances chimiques appropriées stockées dans ce réservoir 36. Ces substances sont choisies .y en fonction, notamment de la composition des eaux polluées -4- f • · pour éviter la fuite vers l'atmosphère de composés ä base de soufre, notamment de l'acide suifhydrique(H2S). Ces additifs chimiques servent à éliminer et précipiter ces ‘ composants nocifs, notamment par oxydation. Par ailleurs, 5 l'effet de ces additifs chimiques ainsi que l'augmentation progressive du pH de la pulpe par suite du contact avec le laitier basique entraîne la précipitation de composés métalliques lourds notamment de sulfate de calcium si la saturation en ions SO^ est atteinte. Les additifs chimiques 10 peuvent également contribuer à une réduction de la concentration en cyanides et en phénols dans l'eau de granulation.With a view to implementing the method according to the invention, nozzles 34 35 are supplied in the hood 28 supplied with a reservoir 36 of suitable chemical substances stored in this reservoir 36. These substances are chosen according to, in particular of the composition of polluted water -4- f • · to prevent the leakage to the atmosphere of sulfur-based compounds, in particular hydrofluoric acid (H2S). These chemical additives are used to remove and precipitate these harmful components, notably by oxidation. Furthermore, the effect of these chemical additives as well as the gradual increase in the pH of the pulp as a result of contact with basic slag results in the precipitation of heavy metal compounds, in particular calcium sulphate if the saturation in SO SO ions is reached. The chemical additives can also contribute to a reduction in the concentration of cyanides and phenols in the granulation water.
Les vapeurs partiellement débarassées des composants nocifs sont ensuite dégagées à travers la hotte 28 vers l'atmosphère. Par ailleurs, une partie des composés 15 nocifs ainsi précipités restent enfermés dans les particules de laitier en voie de solidification. Ceci ne constitue aucun inconvénient pour la qualité du laitier, notamment celui qui est utilisé en cimenterie. Une autre partie de ces composés est retenue lors de la filtration 20 dans le tambour 20 et reste mélangée au laitier granuléThe partially ridged vapors of the harmful components are then released through the hood 28 to the atmosphere. Furthermore, some of the harmful compounds thus precipitated remain trapped in the slag particles which are in the process of solidification. This does not constitute any disadvantage for the quality of the slag, in particular that which is used in cement works. Another part of these compounds is retained during filtration 20 in the drum 20 and remains mixed with the granulated slag
Les particules les plus fines des composés précipités qui ne sont pas retenues par la filtration ni enfermées dans les particules de laitier granulé suivent le circuit normal de l'eau de filtration dans l'installation. 25 Ces particules se déposent avec les fines de laitier dans «I — la trémie 24 et sont recirculées en partie à travers le circuit 26 vers le dispositif de granulation 10.The finest particles of the precipitated compounds which are not retained by filtration or trapped in the particles of granulated slag follow the normal circuit of the filtration water in the installation. 25 These particles are deposited with the slag fines in "I - the hopper 24 and are partially recirculated through the circuit 26 to the granulation device 10.
D'autres particules encore qui restent en suspen-' sion dans l'eau décantée peuvent se déposer dans le bac 30 de décantation a chicanes 30. SI nécessaire, on peut ‘ injecter d'autres addirifs chimiques à partir d'un réservoir iS 38 dans ce bac 30 afin de provoquer la précipitation de composés métalliques qui restent encore en suspens dans l'eau décantée.Still other particles which remain in suspension in the decanted water can be deposited in the baffle decantation tank 30 30. If necessary, other chemical additives can be injected from an iS tank 38 in this tank 30 in order to cause the precipitation of metallic compounds which still remain suspended in the decanted water.
L'eau recueillie à la sortie 4C du bac 3G, sans être de l'eau totalement épurée, est de l’eau dont le degré ce pollution est largement inférieur à celui i * * -5- de l'eau polluée recueillie dans le réservoir 32 et qui se situe dans les limites tolérées par les réglementations en vigueur.The water collected at the outlet 4C of the 3G tank, without being completely purified water, is water whose degree of pollution is much lower than that of polluted water collected in the tank 32 and which is within the limits tolerated by the regulations in force.
« i » | i s f | i λ ! 4"I" | i s f | i λ! 4
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU85508A LU85508A1 (en) | 1984-08-14 | 1984-08-14 | PROCESS OF PARTIAL PURIFICATION OF POLLUTED WATER |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU85508A LU85508A1 (en) | 1984-08-14 | 1984-08-14 | PROCESS OF PARTIAL PURIFICATION OF POLLUTED WATER |
| LU85508 | 1984-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU85508A1 true LU85508A1 (en) | 1984-12-13 |
Family
ID=19730308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU85508A LU85508A1 (en) | 1984-08-14 | 1984-08-14 | PROCESS OF PARTIAL PURIFICATION OF POLLUTED WATER |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU85508A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0331136A1 (en) * | 1988-03-03 | 1989-09-06 | Dieter Bräuer | Installations for waste water disposal |
| EP0573769A1 (en) * | 1992-06-02 | 1993-12-15 | Paul Wurth S.A. | Desulphurisation process for gases formed during the granulation of blast furnace slag |
| LU91088B1 (en) * | 2004-07-14 | 2006-01-16 | Wurth Paul Sa | Method and device for granulating a melt |
-
1984
- 1984-08-14 LU LU85508A patent/LU85508A1/en unknown
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0331136A1 (en) * | 1988-03-03 | 1989-09-06 | Dieter Bräuer | Installations for waste water disposal |
| WO1989008082A1 (en) * | 1988-03-03 | 1989-09-08 | Braeuer Dieter | Devices for treating waste water |
| EP0573769A1 (en) * | 1992-06-02 | 1993-12-15 | Paul Wurth S.A. | Desulphurisation process for gases formed during the granulation of blast furnace slag |
| LU91088B1 (en) * | 2004-07-14 | 2006-01-16 | Wurth Paul Sa | Method and device for granulating a melt |
| WO2006005653A1 (en) * | 2004-07-14 | 2006-01-19 | Paul Wurth S.A. | Process and apparatus for granulating a melt |
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