EP0047963A1 - Method for the continuous introduction into a blast furnace of a reducing agent containing coke with cinder contents - Google Patents
Method for the continuous introduction into a blast furnace of a reducing agent containing coke with cinder contents Download PDFInfo
- Publication number
- EP0047963A1 EP0047963A1 EP81107050A EP81107050A EP0047963A1 EP 0047963 A1 EP0047963 A1 EP 0047963A1 EP 81107050 A EP81107050 A EP 81107050A EP 81107050 A EP81107050 A EP 81107050A EP 0047963 A1 EP0047963 A1 EP 0047963A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blast furnace
- reducing agent
- ash
- mixture
- fine
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
Definitions
- the invention relates to a method for continuously blowing in fine-grained carbon carriers containing ash-containing hard coal as a reducing agent into the frame of a blast furnace.
- the invention is therefore based on the object of modifying the method of the type described in the introduction in such a way that the aforementioned difficulties are avoided and the use of fine-grained hard coal, even if it is ash-rich, is made possible without disadvantages.
- the invention proposes that a mixture of fine-grained hard coal and at least one other solid, fine-grained, ash-containing reducing agent or carbon carrier is used and that the composition of the mixture is chosen so that the degree of basicity of the resulting total ash of the mixture is as close as possible to the basicity of Blast furnace slag is adapted.
- Such a reducing agent is lignite, for example.
- a typical brown coal has an ash content of 4 - 5%, of which approx. 60% consists of CaO and MgO. Lignit can also meet these requirements. It is also possible to use coke made from these carbon carriers, the ash content of which will be even slightly higher.
- Another embodiment of the method according to the invention provides for the use of peat and / or peat coke, both of which contain basic ashes. Sawdust can also be used cheaply as a reducing agent.
- the fact that comminuting lignite, lignite and peat and the coke obtained from these substances to the required degree of fineness does not cause too great a cost.
- the possibility of leaving a water content of up to 15%, preferably up to 10%, in the mixture also has a cost-effective effect.
- the water content can cause the water to evaporate explosively when entering the blast furnace due to the then suddenly high temperature of about 1000 - 1650 ° C and, together with the volatile components that are also explosively expelled, blow up the already small coal grain, so that the specific surface area is increased with the result that the implementation in the blast furnace takes place even faster.
- the water content is so low that the heat requirement of the blast furnace is not noticeably affected.
- the carrier gas that enters the blast furnace with the mixture can make up less than 3%, possibly about 1%, of the total hot wind blown in by the blow molds. This amount is too small to have a significant impact on the blast furnace's heat balance.
- the speed at which the hot wind which normally has a temperature of about 1100 to 1200 ° C., is blown through the blow molds, extends the dwell time of the dust particles in the zone in front of each blow mold, which is more or less empty.
- the method according to the invention enables relatively large amounts of carbon to be blown in and thus a noticeable reduction in coke consumption or a complete substitution of the heavy oil which has been predominantly used up to now. This is due to the fact already mentioned that there are no difficulties or difficulties in transporting them into the blast furnace, nor in the implementation within the blast furnace. The extent to which coke can be replaced by another auxiliary fuel is thus consistently greater than in known methods for blowing coal as auxiliary fuel into the frame of a blast furnace.
- the basic ash components are in the majority of cases in the form of Fe203, CaO, MgO, Na 2 0 and K 2 0, that is to say in the form of basic oxides.
- Si0 2 and P 2 0 5 are essentially acidic ash constituents, and A1 2 0 3 and Ti0 2 in principle are amphoteric compounds, but these are considered to be acidic elements in metallurgical practice.
- Example 1 shows two ways of achieving a base-acid ratio of about 1 when lignite and hard coal are mixed in the resulting mixture.
- 68.85% lignite (wf) is mixed with 31.15% hard coal (wf).
- Example 2 76.83% lignite (wf) is mixed with 23.17% hard coal (wf).
- the different proportions of both types of coal result from the fact that hard coal with different Ash contents are used, the ash content of the hard coal in Example 2 being significantly higher than that in Example 1.
- the same lignite with an ash content of 5.62% (wf) and the same ash composition was used.
Abstract
Beim Einblasen eines Gemisches von aschehaltigen Kohlenstoffträgern als Reduktionsmittel in das Gestell eines Hochofens wird die Zusammensetzung das Gemisches in Abhängigkeit von dem basischen und den sauren Aschebestandteilen der Komponenten des Gemisches so ausgewählt, dass der Basizitätsgrad der resultierenden Gesamtasche des Gemisches dem Basizitätsgrad der Hochofen-Schlacke angepasst ist.When blowing a mixture of ash-containing carbon carriers as a reducing agent into the frame of a blast furnace, the composition of the mixture is selected depending on the basic and the acidic ash components of the components of the mixture so that the degree of basicity of the resulting total ash of the mixture matches the degree of basicity of the blast furnace slag is.
Description
Die Erfindung betrifft ein Verfahren zum kontinuierlichen Einblasen von aschehaltige Steinkohle enthaltenden, feinkörnigen Kohlenstoffträgern als Reduktionsmittel in das Gestell eines Hochofens.The invention relates to a method for continuously blowing in fine-grained carbon carriers containing ash-containing hard coal as a reducing agent into the frame of a blast furnace.
Obwohl es bekannt ist, dass der Koksverbrauch eines Hochofens durch Verwendung anderer Brennstoffe oder durch direktes Einführen von Reduktionsmitteln in den Hochofen verringert werden kann, hat das Einblasen von Kohle in den Hochofen im praktischen Betrieb bislang nur in sehr beschränktem Umfange Anwendung gefunden. Dies ist unter anderem darauf zurückzuführen, dass die Aufbereitung, der Transport und die Verteilung von feinkörniger Kohle von einem Vorratsbehälter in die Einlassöffnungen des Hochofens hinein, bei denen es sich im allgemeinen um die ohnehin vorhandenen Blasformen handelt, mit grösseren Schwierigkeiten verbunden sind als bei einem flüssigen Medium, z.B. öl oder Gas. Auch wird eine unvollständige Umsetzung von eingeblasenen festen Brennstoffen zu merklichen Störungen im Betrieb des Hochofens führen, z. B. durch Entstehen von Russ, der die Durchlässigkeit des Möllers für das Reduktionsgas verringert und ggf. auch im Gichtgas vorhanden ist. Letzteres kann in den vom Gichtgas durchströmten Einrichtungen zu Störungen führen.Although it is known that the coke consumption of a blast furnace can be reduced by using other fuels or by directly introducing reducing agents into the blast furnace, the blowing of coal into the blast furnace has only been used to a very limited extent in practical operation. This is due, among other things, to the fact that the processing, transport and distribution of fine-grained coal from a storage container into the inlet openings of the blast furnace, which are generally blow molds that are already present, are more difficult than with one liquid medium, e.g. oil or gas. Also an incomplete implementation of injected solid fuels will lead to noticeable malfunctions in the operation of the blast furnace, e.g. B. by the formation of soot, which reduces the permeability of the furniture for the reducing gas and is possibly also present in the blast furnace gas. The latter can lead to faults in the facilities through which the blast furnace gas flows.
Will man zwecks Erzielung der angestrebten Einsparung eine billigere Steinkohle, z. B. Import-Steinkohle verwenden, so stösst man auf eine weitere Schwierigkeit. Billige Steinkohlen weisen hohe Aschegehalte auf, die sich zwischen 15 - 25% bewegen können, wobei die Asche überwiegend saure Bestandteile enthalten kann. Bei der Verwendung von Steinkohlen dieser Art ist somit die Gefahr gegeben, dass diese sauren Aschebestandteile sich nicht schnell genug in der Hochofenschlacke verteilen und dass die resultierenden, inhomogenen Oxydgemische schlechte Fliesseigenschaften aufweisen und den Gang des Hochofens stören.If you want to achieve the desired savings cheaper coal, z. B. Use imported coal, so you encounter another difficulty. Cheap hard coal has high ash contents, which can range between 15 - 25%, whereby the ash can contain mostly acidic components. When using hard coal of this type, there is a risk that these acidic ash components will not spread quickly enough in the blast furnace slag and that the resulting, inhomogeneous oxide mixtures will have poor flow properties and interfere with the operation of the blast furnace.
Der Erfindung liegt somit die Aufgabe zugrunde, das Verfahren der eingangs beschriebenen Art so abzuwandeln, dass die vorgenannten Schwierigkeiten vermieden werden und auch die Verwendung feinkörniger Steinkohle, selbst wenn sie aschereich ist, ohne Nachteile ermöglicht wird.The invention is therefore based on the object of modifying the method of the type described in the introduction in such a way that the aforementioned difficulties are avoided and the use of fine-grained hard coal, even if it is ash-rich, is made possible without disadvantages.
Zur Lösung dieser Aufgabe schlägt die Erfindung vor, dass ein Gemisch aus feinkörniger Steinkohle und wenigstens einem anderen festen, feinkörnigen, aschehaltigen Reduktionsmittel bzw. Kohlenstoffträger verwendet und die Zusammensetzung des Gemisches so gewählt wird, dass der Basizitätsgrad der resultierenden Gesamtasche des Gemisches möglichst dem Basizitätsgrad der Hochofenschlacke angepasst ist.To achieve this object, the invention proposes that a mixture of fine-grained hard coal and at least one other solid, fine-grained, ash-containing reducing agent or carbon carrier is used and that the composition of the mixture is chosen so that the degree of basicity of the resulting total ash of the mixture is as close as possible to the basicity of Blast furnace slag is adapted.
Ein solches Reduktionsmittel ist beispielsweise Braunkohle. Eine typische Braunkohle weist einen Aschegehalt von 4 - 5% auf, wovon ca. 60% aus CaO und MgO bestehen. Diese Voraussetzungen können auch bei Lignit bestehen. Es ist auch möglich, aus diesen Kohlenstoffträgern hergestellte Kokse zu verwenden, deren Aschegehalt sogar noch etwas höher liegen wird.Such a reducing agent is lignite, for example. A typical brown coal has an ash content of 4 - 5%, of which approx. 60% consists of CaO and MgO. Lignit can also meet these requirements. It is also possible to use coke made from these carbon carriers, the ash content of which will be even slightly higher.
Eine weitere Ausführungsform des erfindungsgemässen Verfahrens sieht die Verwendung von Torf und/oder von Torfkoks vor, die beide basische Aschen enthalten. Auch Sägemehl kann als Reduktionsmittel günstig verwendet werden.Another embodiment of the method according to the invention provides for the use of peat and / or peat coke, both of which contain basic ashes. Sawdust can also be used cheaply as a reducing agent.
Die Verwendung von Gemischen aus Steinkohle und aus Braunkohle und/oder Lignit und/oder Torf und/oder aus den vorgenannten Substanzen gewonnenen Koksen begünstigt in entsprechend feiner Körnung eine möglichst vollständige Umsetzung innerhalb des Hochofens in der kurzen dafür zur Verfügung stehenden Zeit, da diese Substanzen reaktionsfreudig sind. Hinzu kommt, dass das Zuführen dieser Gemische zum Hochofen keine Schwierigkeiten bereitet.The use of mixtures of hard coal and of lignite and / or lignite and / or peat and / or coke obtained from the aforementioned substances favors the most complete possible implementation within the blast furnace in the short time available, because these substances are responsive. In addition, feeding these mixtures to the blast furnace presents no difficulties.
Besonders günstig ist auch die Tatsache, dass das Zerkleinern von Braunkohle, Lignit sowie Torf und den aus diesen Substanzen gewonnenen Koksen auf den erforderlichen Feinheitsgrad keine allzu grossen Kosten verursacht. Kostengünstig wirkt sich auch die Möglichkeit aus, im Gemisch einen Wassergehalt bis zu 15%, vorzugsweise bis zu lO%, zu belassen. Tatsächlich kann der Wassergehalt dazu führen, dass beim Eintritt in den Hochofen aufgrund der dann plötzlich zur Einwirkung kommenden hohen Temperatur von etwa 1000 - 1650° C das Wasser explosionsartig verdampft und gemeinsam mit den ebenfalls explosionsartig ausgetriebenen flüchtigen Bestandteilen das ohnehin kleine Kohlenkorn sprengt, so dass die spezifische Oberfläche vergrössert wird mit dem Ergebnis, dass die Umsetzung im Hochofen noch schneller stattfindet. Der Wassergehalt ist andererseits so gering, dass der Wärmebedarf des Hochofens nicht merklich beeinflusst wird.The fact that comminuting lignite, lignite and peat and the coke obtained from these substances to the required degree of fineness does not cause too great a cost. The possibility of leaving a water content of up to 15%, preferably up to 10%, in the mixture also has a cost-effective effect. In fact, the water content can cause the water to evaporate explosively when entering the blast furnace due to the then suddenly high temperature of about 1000 - 1650 ° C and, together with the volatile components that are also explosively expelled, blow up the already small coal grain, so that the specific surface area is increased with the result that the implementation in the blast furnace takes place even faster. On the other hand, the water content is so low that the heat requirement of the blast furnace is not noticeably affected.
Das Trägergas, das mit dem Gemisch in den Hochofen gelangt, beispielsweise Kaltluft, kann weniger als 3%, ggf. etwa 1%, des gesamten durch die Blasformen eingeblasenen Heisswindes ausmachen. Diese Menge ist zu gering, als dass sie den Wärmehaushalt des Hochofens merklich beeinflussen könnte. Ohnehin sieht man nach Möglichkeit vor, dass die Geschwindigkeit, mit welcher die Staubteilchen aus der Zuleitung in den Hochofen austreten, weniger als 50 m/sec., vorzugsweise weniger als 25 m/sec. beträgt. Es ist ggf. auch ohne weiteres möglich, mit der Einblasegeschwindigkeit bis zur Rückbrenngeschwindigkeit herunterzugehen, die in der Grössenordnung von etwa 18 m/sec. liegen wird. Eine derartig geringe Einblasgeschwindigkeit, die wesentlich langsamer ist als die etwa 120 bis 220 m/sec. betragende Geschwindigkeit, mit welcher der normalerweise eine Temperatur von etwa 1100 bis 1200° C aufweisende Heisswind durch die Blasformen eingeblasen wird, verlängert die Verweilzeit der Staubpartikel in der vor jeder Blasform befindlichen Zone, die mehr oder weniger leer ist.The carrier gas that enters the blast furnace with the mixture, for example cold air, can make up less than 3%, possibly about 1%, of the total hot wind blown in by the blow molds. This amount is too small to have a significant impact on the blast furnace's heat balance. In any case, provision is made for the speed at which the dust particles exit the feed line into the blast furnace to be less than 50 m / sec., Preferably less than 25 m / sec. is. It may also be possible, without further ado, to reduce the blowing speed down to the burn-back speed, which is of the order of magnitude 18 m / sec. will lie. Such a low blowing speed, which is much slower than the approximately 120 to 220 m / sec. The speed at which the hot wind, which normally has a temperature of about 1100 to 1200 ° C., is blown through the blow molds, extends the dwell time of the dust particles in the zone in front of each blow mold, which is more or less empty.
Das Verfahren gemäss der Erfindung ermöglicht das Einblasen verhältnismässig grosser Mengen von Kohlenstoff und somit eine merkliche Reduzierung des Koksverbrauches bzw. eine vollständige Substituierung des bislang überwiegend verwendeten Schweröls. Dies ist auf die bereits erwähnte Tatsache zurückzuführen, dass weder beim Transport in den Hochofen hinein, noch bei der Umsetzung innerhalb des Hochofens Schwierigkeiten vorhanden sind oder entstehen. Das Ausmass, in welchem Koks durch einen anderen Hilfsbrennstoff ersetzt werden kann, ist somit durchweg grösser als bei bekannten Verfahren zum Einblasen von Kohle als Hilfsbrennstoff in das Gestell eines Hochofens.The method according to the invention enables relatively large amounts of carbon to be blown in and thus a noticeable reduction in coke consumption or a complete substitution of the heavy oil which has been predominantly used up to now. This is due to the fact already mentioned that there are no difficulties or difficulties in transporting them into the blast furnace, nor in the implementation within the blast furnace. The extent to which coke can be replaced by another auxiliary fuel is thus consistently greater than in known methods for blowing coal as auxiliary fuel into the frame of a blast furnace.
Die basischen Aschebestandteile liegen in der Mehrzahl der Fälle in Form von Fe203, CaO, MgO, Na20 und K20, also in Form basischer Oxide vor. Als saure Aschebestandteile kommen im wesentlichen Si02 und P205 sowie als prinzipiell amphotere Verbindungen A1203 und Ti02, die aber in der Hüttenpraxis den sauren Elementen zugerechnet werden, in Frage.The basic ash components are in the majority of cases in the form of Fe203, CaO, MgO, Na 2 0 and K 2 0, that is to say in the form of basic oxides. Si0 2 and P 2 0 5 are essentially acidic ash constituents, and A1 2 0 3 and Ti0 2 in principle are amphoteric compounds, but these are considered to be acidic elements in metallurgical practice.
In den folgenden Beispielen sind zwei Möglichkeiten angeführt, um bei der Vermischung von Braunkohle und Steinkohle im resultierenden Gemisch ein Basen-Säuren-Verhältnis von etwa 1 zu erreichen. Im Beispiel 1 werden 68,85% Braunkohle (wf) mit 31,15% Steinkohle (wf) vermischt. Im Beispiel 2 werden 76,83% Braunkohle (wf) mit 23,17% Steinkohle (wf) vermischt. Die unterschiedlichen Anteile beider Kohlesorten ergeben sich daraus, dass Steinkohlen mit unterschiedlichen Aschegehalten verwendet werden, wobei der Aschegehalt der Steinkohle im Beispiel 2 wesentlich höher ist als der im Beispiel 1. In beiden Beispielen wurde die gleiche Braunkohle mit einem Aschgehalt von 5,62% (wf) und gleicher Aschezusammensetzung zugrunde gelegt.The following examples show two ways of achieving a base-acid ratio of about 1 when lignite and hard coal are mixed in the resulting mixture. In example 1, 68.85% lignite (wf) is mixed with 31.15% hard coal (wf). In Example 2, 76.83% lignite (wf) is mixed with 23.17% hard coal (wf). The different proportions of both types of coal result from the fact that hard coal with different Ash contents are used, the ash content of the hard coal in Example 2 being significantly higher than that in Example 1. In both examples, the same lignite with an ash content of 5.62% (wf) and the same ash composition was used.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3034679A DE3034679C2 (en) | 1980-09-13 | 1980-09-13 | Process for the continuous injection of reducing agents containing ash containing coal into the frame of a blast furnace |
| DE3034679 | 1980-09-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0047963A1 true EP0047963A1 (en) | 1982-03-24 |
| EP0047963B1 EP0047963B1 (en) | 1985-06-05 |
Family
ID=6111928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81107050A Expired EP0047963B1 (en) | 1980-09-13 | 1981-09-08 | Method for the continuous introduction into a blast furnace of a reducing agent containing coke with cinder contents |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4428769A (en) |
| EP (1) | EP0047963B1 (en) |
| JP (1) | JPS5779103A (en) |
| AU (1) | AU541784B2 (en) |
| CA (1) | CA1172855A (en) |
| DE (2) | DE3034679C2 (en) |
| LU (1) | LU83212A1 (en) |
| ZA (1) | ZA815975B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2489370A1 (en) * | 1980-09-04 | 1982-03-05 | Arbed | PROCESS FOR THE CONTINUOUS INSUFFLATION IN A TANK OVEN OF FINE GRAIN REDUCING AGENTS CONSISTING ESSENTIALLY OF COAL |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447571A (en) * | 1994-03-07 | 1995-09-05 | The Babcock & Wilcox Company | Cleaning method for pulverized coal injection system equipment using coke breeze |
| US5992335A (en) | 1996-09-13 | 1999-11-30 | Nkk Corporation | Method of blowing synthetic resin into furnace and apparatus therefor |
| KR101167712B1 (en) * | 2003-06-10 | 2012-07-23 | 쥬에츠 고킨 츄코 가부시키가이샤 | Synchronizer ring |
| JP6016210B2 (en) * | 2012-08-13 | 2016-10-26 | 三菱重工業株式会社 | Production method of blast furnace injection coal |
| JP2014077156A (en) * | 2012-10-09 | 2014-05-01 | Mitsubishi Heavy Ind Ltd | Method of preparing blast furnace coal |
| JP2014077159A (en) * | 2012-10-09 | 2014-05-01 | Mitsubishi Heavy Ind Ltd | Method of preparing blast furnace coal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR808869A (en) * | 1935-09-12 | 1937-02-17 | Roechlingsche Eisen & Stahl | Process of making steel from acidic and poor iron ores, containing phosphorus |
| FR894082A (en) * | 1942-04-04 | 1944-12-13 | Ig Farbenindustrie Ag | Process for driving homes fueled with coal dust |
| LU49024A1 (en) * | 1965-07-08 | 1967-01-09 | ||
| DE1433357A1 (en) * | 1964-12-09 | 1968-12-19 | Alfred Rexroth | Process for partially replacing the Gattierkokses in Metallreduzieroefen with coal or coke powder pressed into the nozzle zone |
| FR2298771A1 (en) * | 1975-01-21 | 1976-08-20 | Jan Joseph | Oil burner assisted peat stove - has vibratory hopper and blower tube discharging into oil fired combustion chamber |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1349598A (en) | 1917-10-12 | 1920-08-17 | Basset Lucien Paul | Process for treating ores in blast-furnaces |
| US2184318A (en) | 1934-11-15 | 1939-12-26 | Ruzicka Stevan | Process for simultaneous production of alumina cement and pig iron in blast furnaces |
| DE2912441C2 (en) | 1979-03-29 | 1982-09-23 | ARBED S.A., 2930 Luxembourg | Process for the continuous injection of fine-grained brown coal into the frame of a blast furnace |
| LU81572A1 (en) | 1979-08-02 | 1981-03-24 | Arbed | METHOD FOR REGULATING THE HEATING BALANCE IN A SHAFT STOVE AND MEANS TO BE USED FOR THIS |
-
1980
- 1980-09-13 DE DE3034679A patent/DE3034679C2/en not_active Expired
-
1981
- 1981-03-12 LU LU83212A patent/LU83212A1/en unknown
- 1981-08-28 ZA ZA815975A patent/ZA815975B/en unknown
- 1981-09-03 US US06/299,005 patent/US4428769A/en not_active Expired - Fee Related
- 1981-09-04 JP JP56138689A patent/JPS5779103A/en active Pending
- 1981-09-08 EP EP81107050A patent/EP0047963B1/en not_active Expired
- 1981-09-08 DE DE8181107050T patent/DE3170852D1/en not_active Expired
- 1981-09-11 CA CA000385650A patent/CA1172855A/en not_active Expired
- 1981-09-11 AU AU75153/81A patent/AU541784B2/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR808869A (en) * | 1935-09-12 | 1937-02-17 | Roechlingsche Eisen & Stahl | Process of making steel from acidic and poor iron ores, containing phosphorus |
| FR894082A (en) * | 1942-04-04 | 1944-12-13 | Ig Farbenindustrie Ag | Process for driving homes fueled with coal dust |
| DE1433357A1 (en) * | 1964-12-09 | 1968-12-19 | Alfred Rexroth | Process for partially replacing the Gattierkokses in Metallreduzieroefen with coal or coke powder pressed into the nozzle zone |
| LU49024A1 (en) * | 1965-07-08 | 1967-01-09 | ||
| FR2298771A1 (en) * | 1975-01-21 | 1976-08-20 | Jan Joseph | Oil burner assisted peat stove - has vibratory hopper and blower tube discharging into oil fired combustion chamber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2489370A1 (en) * | 1980-09-04 | 1982-03-05 | Arbed | PROCESS FOR THE CONTINUOUS INSUFFLATION IN A TANK OVEN OF FINE GRAIN REDUCING AGENTS CONSISTING ESSENTIALLY OF COAL |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5779103A (en) | 1982-05-18 |
| DE3170852D1 (en) | 1985-07-11 |
| CA1172855A (en) | 1984-08-21 |
| US4428769A (en) | 1984-01-31 |
| DE3034679C2 (en) | 1983-01-13 |
| LU83212A1 (en) | 1981-06-24 |
| EP0047963B1 (en) | 1985-06-05 |
| AU7515381A (en) | 1982-03-25 |
| AU541784B2 (en) | 1985-01-17 |
| DE3034679A1 (en) | 1982-04-01 |
| ZA815975B (en) | 1982-08-25 |
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