AU613111B2 - Device for delivery of charge-oxygen mixture in metallurgical furnace - Google Patents
Device for delivery of charge-oxygen mixture in metallurgical furnace Download PDFInfo
- Publication number
- AU613111B2 AU613111B2 AU25673/88A AU2567388A AU613111B2 AU 613111 B2 AU613111 B2 AU 613111B2 AU 25673/88 A AU25673/88 A AU 25673/88A AU 2567388 A AU2567388 A AU 2567388A AU 613111 B2 AU613111 B2 AU 613111B2
- Authority
- AU
- Australia
- Prior art keywords
- branch pipe
- charge
- oxygen
- delivery
- stepped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 229910052760 oxygen Inorganic materials 0.000 title claims description 86
- 239000001301 oxygen Substances 0.000 title claims description 86
- 239000000203 mixture Substances 0.000 title claims description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 43
- 230000008878 coupling Effects 0.000 claims 3
- 238000010168 coupling process Methods 0.000 claims 3
- 238000005859 coupling reaction Methods 0.000 claims 3
- 238000002844 melting Methods 0.000 description 14
- 230000008018 melting Effects 0.000 description 14
- 230000007423 decrease Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- WTEVQBCEXWBHNA-YFHOEESVSA-N neral Chemical compound CC(C)=CCC\C(C)=C/C=O WTEVQBCEXWBHNA-YFHOEESVSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- WTEVQBCEXWBHNA-UHFFFAOYSA-N Citral Natural products CC(C)=CCCC(C)=CC=O WTEVQBCEXWBHNA-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- WTEVQBCEXWBHNA-JXMROGBWSA-N citral A Natural products CC(C)=CCC\C(C)=C\C=O WTEVQBCEXWBHNA-JXMROGBWSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
- C22B5/14—Dry methods smelting of sulfides or formation of mattes by gases fluidised material
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
ii COMMONWEALTH OF AUS ALI PATENTS ACT 1952 Form SUBSTITUTE COMPLETE SPECIFICATION FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: o o 0 0 0 o 0 0 0 00 0 00 O Q a 0 00 0 00 0 0 0 I 6 0 Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: TO BE COMPLETED BY APPLICANT Name of Applicant: Address of Applicant: Actual Inventor: Address for Service: (t0 tC(.
VSESOJUZNY NAUCHNO- ISSLEDOVATELSKY GORNO-METALLURGICHESKY INSTITUT TSVETNYKH METALLOV (VNIITSVETMET) Ust-Kamenogorsk, Ulitsa Promyshlennaya I,
U.S.S.R.
Vladimir Antonovich Suschinsky and Anatoly Petrovich Sychev GRIFFITH HACK CO.
71 YORK STREET SYDNEY NSW 2000
AUSTRALIA
Complete Specification for the invention entitled: "DEVICE FOR DELIVERY OF CHARGE-OXYGEN MIXTURE IN METALLURGICAL FURNACE" The following statement is a full description of this invention, including the best method of performing it known to me/us:- 7479A:JM DEVICE FOR DELIVERY OF CHARGE-OXYGEN MIXTURE IN METALLURGICAL FURN~ACE The present invention relates to the nonferrous metallurgy and more particularly to devices for delivery of the charge-oxygen mixture in a metallurgical furnace.
The present invention may be used to advantage for melting sulphide concentrates in suspension in o 10 the process of an oxygen flash cyclone electrothermic 0 0 0 940 ~::melting or an oxygen flame melting.
Known to the prior art is a device for delivery of the charge-oxygen mixture in a metallurgical furnace A, 1,078,225), comprising a housing, a branch pipe for delivery of the charge passed inside the housing, a charge-oxygen mixer rigidly coupled witha the housing, communicated to the branch pipe for delivery of the charge and forming therewith a space for oxygen, and branch pipe for the main delivery of oxygen communicated to the housing and to the space for oxygen.
In the given device the charge-oxygen mixer comprises a diffuser disposed on the arch of a metallurgical furnace melting shaft under the housing and comnmunicated therewith, and guide vanes arranged in the diffuser, the branch pipe for delivery of the charge is movably installed inside the housing and the space for oxygen is formed. by the internal surfaces of a portion of the housing end diffuser and the external surface of a portion of the branch pipe for delivery of the charge.
However, in this device the number of oxygen jets formed by the guide vanes of the charge-oxygen mixer is limited and the mixing of oxygen with the charge takes place t in a confined space, in the lower portion of the diffuser, wherein the velocity of the charge-oxygen mixture decreases which results in a failure to ensure a complete oxidation of the charge particles resulting in increase of the dust losses due to which the output of a metallurgical furnace is reduced.
Besides in this device the charge-oxygen mixer opens out the charge-oxygen mixture flame in the body of the arch of a metallurgical furnace which leads to an intensive mechanical wear of the charge-oxygen mixture diffuser and the arch of the metallurgical furnace melting shaft which in its turn decreases the service life of the device and the melting shaft.
Moreover, the forming of the charge-oxygen mixture inside the diffuser of the charge-oxygen mixer causes a premature attrition wear of the diffuser internal surface which involves an increase in the thickness of the walls of the charge-oxygen mixer which in turn leads to increase in the metal intensity of the device.
The present invention is essentially aimed at providing a device for delivery of the charge-oxygen mixture in a metallurgical furnace, wherein a housing and a charge-oxygen mixer are made so as to make it possible to reduce the dust losses, to open out the charge-oxygen mixture flame in the melting shaft of a metallurgical furnace and thus to increase the output and service life of the metallurgical furnace and the device, and to decrease the metal intensity of the device.
Accordingly, the present invention provides a device for delivery of the charge-oxygen mixture in a metallurgical furnace, comprising a housing, a first branch pipe for delivery of the charge into the housing, a charge-oxygen 8484S/KLS 2
A
I
I
~YIYI*UILLIEI*1C~~~_I~ mixer located within the housing and being connected to the first branch pipe and arranged such that a space is formed between the first branch pipe, charge-oxygen mixer, and the housing, and a second branch pipe for the main delivery of oxgyen into said space, wherein the housing forms a closed chamber and the charge oxygen mixer is made in the form of a stepped cone shaped bell mouth disposed inside the closed chamber and provided with stepped portions, each of which has orifices equally spaced along its circumferences with 10 the axis thereof being inclined in one direction relatively to the walls of the stepped bell mouth, the stepped portion having the largest diameter being rigidly coupled with the closed chamber and the stepped portion having the smallest diameter being rigidly coupled to the first branch pipe, with the said space being formed by the external surfaces of the stepped bell mouth, a portion of the first branch pipe and the internal surface of the closed chamber, at least part of the internal surface of the closed chamber being curved and the second branch pipe being arranged to introduce oxygen into the housing substantially at a tangent to the curved portion of the closed chamber.
Preferably the device for delivery of the charge-oxygen mixture in a metallurgical furnace is provided with a means for an additional delivery of oxygen mechanically coupled with the branch pipe for delivery of the charge.
It is likewise preferable that in the device for delivery of the charge-oxygen mixture in a metallurgical furnace the means for an additional delivery of oxygen be provided with a mechanically coupled holder and a nozzle with an outlet and thereof being passed in the stepped bell mouth along the longitudinal axis of the branch pipe for delivery of the charge.
It is preferred that in the device for delivery of the charge-oxygen mixture in a metallurgical furnace an inlet end of the nozzle of the means for an additional delivery of oxygen be passed through a hole made in the wall p -4 .$4r8LAS/KL 3 i of the branch pipe for delivery of the charge being made curved, while the means for an additional delivery of oxygen is additionally provided with a locking element mechanically coupled with the holder which is disposed outside the branch pipe for delivery of the charge and with which is movably coupled the inlet end of the nozzle.
The holder of the means for an additional delivery of oxygen may be made in the form of a cross with a centre portion thereof communicated to the inlet end of the nozzle and disposed inside a portion of the branch pipe for delivery of the charge arranged in the closed chamber, and the surface of this portion of the branch pipe for delivery of the charge be provided with a plurality of holes to the number of pipes of the hollow cross and 0 001 a respective pipe be passed through each of the 000 above-mentioned holes.
0 09 o0000 A preferred embodiment of the present invention makes Co0 0 0, 00 0 it possible to increase the rate of oxidizing reactions in the treated charge at the expense of saturating the latter with oxygen which reduces the dust losses and thus steps up the output of a metallurgical furnace which in the long run leads to increase in the extraction of metal.
In addition, a preferred embodiment of the present invention allows the charge-oxygen mixture flame to be opened out inside the melting shaft of a metallurgical furnace which reduces mechanical wear and thus extends the service life of the device and melting shaft of the metallurgical furnace.
41 <L -8484S/KLS 4- 5 And moreover, a preferred embodiment of the present invention makes it possible to fill the center portion of the charge-oxygen mixture with oxygen which also steps up the output of a metallurgical furnace.
The invention will now be described in greater detail with reference to specific embodiments thereof, taken in connection with the accompanying drawings, 0"o°o wherein: 00 0 Fig. 1 is longitudinal section illustrating a ge- O 0 0000 10 neral view of the device for delivery of the charge- 000 0 -oxygen mixture in a metallurgical furnace, according 00 0 0 00 O °o to the invention; Fig. 2 is a section taken along the line II-II of Fig. 1; Fig. 3 is a longitudinal section illustrating a general view of the device for delivery of the Scharge-oxygen mixture in a metallurgical furnace complete with a means for an additional delivery of oxygen, according to the invention; Fig. 4 is a longitudinal section illustrating a general view of the device for delivery of the charge- -oxygen mixture in a metallurgical furnace complete with a hollow cross of the means for an additional delivery of oxygen, according to the invention; Fig. 5 is a section taken along the line V-V of Fig. 4.
A device for delivery of the charge-oxygen mix- Sture in a metallurgical furnace comprises a closed chamber 1 (Fig. 1) internally accommodating a charge- -oxygen mixer made in the form of a stepped cone-shaped bell mouth 2. The bell mouth 2 has three step portions 3, 4, 5 each of which is respectively provided with orifices 6, 7, 8 (Figs. 1, 2) equally spaced along the circumference. Axes 9, 10, 11 of the respective orifices 6, 7, 8 are inclined in one direction relatively to the surface of the bell mouth 2. The step portion 5 (Fig. 1) of the bell mouth 2 having a larger diameter is rigidly coupled with a wall 12 of the chamber 1. The step portion 3 of the bell mouth 2 having a smaller diameter is- cocxially and rigidly coupled with a branch pipe 13 for delivery of the charge. A branch pipe 14 for the main delivery of oxygen is tangentially secured to the chamber 1. An external surface 15 of the bell mouth 2 and an external surface 16 of a portion of the branch pipe 13 arranged inside the chamber 1 form together with an internal surface 17 of the chamber 1 a space 18 for oxygen. In the operating position the chamber 1 is inserted in the body of a melting shaft arch 19 (not shown in the drawing) of a metallurgical furnace so that the step portion 5 of the bell mouth 2 is disposed in the melting -,haft below the arch 19.
According to another embodiment of the device for delivery of the charge-oxygen mixture in a metallurgical furnace, a branch pipe 20 (Fig. 3) is made curved and, its surface having a substantially large 7 radius of curvature is provided with a hole through which is passed a nozzle 21 of a means 22 for an additional delivery of oxygen. An outlet end 23 of the nozzle 21 is disposed inside the bell mouth 2 coaxially therewith. An inlet end 24 of the nozzle 21 is mechanically coupled with a holder 26 installed on the branch pipe 2U and adapted for movement through the medium of a locking element 25 (further reso ferred to as a scre. "o 10 In a final embodiment of the device for delivery o of the charge-oxygen mixture in a metallurgical furnace the holder of the means 22 (Fig. 4) is made in 4C• the form of a hollow cross 27. The cross 27 incorporates pipes 29 (Figs 4,5) communicated with one another through the medium of a center portion 28. The inlet end 24 (Fig. 4) of the nozzle 21 is communicated to the center portion' 28. The cross 27 is internally accommodated in a portion of the branch pipe 13 disposed in the chamber 1 and walls 30 of S, 20 the branch pipe 13 are provided with three holes through each of which is passed the respective pipe 4 29 of the cross 27.
The device for delivery of the charge-oxygen mixture in a metallurgical furnace, according to Figs 1,2 operates in the following way.
From a batch meter (not shown in the drawing) i the charge is delivered in the stepped bell mou.th 2 through the branch pipe 13 for delivery of the charge.
At the same time oxygen is delivered through the branch pipe 14 for the main delivery of oxygen for the oxygen to pass in the space 18 for oxygen. Due to the fact that the branch pipe 14 is tangentially secured to the chamber 1, oxygen passes at a great yelocity from the space 18 through the orifices 6, 7, 8 in the stepped bell mouth 2. Due to the inclination v of the axes of the orifices 6, 7, 8 in one direction, a rotary motion is imparted to the jets of oxygen respectively in the step portions 3, 4, 5 of the stepped j bell mouti 2. The cone shape of the bell mouth 2 makes it poss'ible to increase both the velocity of oxygen and diameter of the charge-oxygen mixture flame.
On meeting the flowi of charge in the bell mouth 2 the fine and multiple jets of oxygen moving at a sub- V stan-t'ially high velocity and having a rotary motion break down this flow of charge. The charge particles are carried along by the jets of oxygen and gain a vortex motion. The cone shape of the bell mouth 2 set in the process of the device operation in the body of the arch 19 causes the charge-oxygen mixture flame to open out inside the melting shaft of a metallurgical furnace, thereby forming a multiple-step charge-oxygen vortex which extends the time period during which the charge particles remain in suspension, thus ensuring an adeq~uate mixing of oxygen with the charge throughout its entire volume. This leads to a more complete oxidation and melting of all the charge particles and consequently to decrease in the dust losses with the result that the output of a metallurgical furnace is stepped up.
The device for delivery of the charge-oxygen mixture in a metallurgical furnace, according to Fig. 3, operates in the following way.
When the device is employed in metallurgical furnaces using a volume of the treated charge larger than in the furnace mentioned above, oxygen is delivered S 10 in the stepped bell mouth 2 through the nozzle 21 of a the means 22 for an adaitional delivery of oxygen. In a a °the bell mouth 2 oxygen passes through the center of 4 '4 the charge flow and fills the center portion of the charge-oxygen mixture flame inside the melting shaft, thereby ensuring a uniform mixing of oxygen with the charge throughout its entire volume.
Curvature of the branch pipe 20 for delivery of the charge provides more convenience in case when it is necessary to move the nozzle 21 in the holder 26 by means of the screw In other respects the device operates in much the same way as described hereinbefore.
The device for delivery of the charge-oxygen mixture in a metallurgical furnace, according to Figs 4, operates in much the same way as described hereinbefore, except for the fact that oxygen is delivered in S1 the pipes 29 of the hollow cross 27 from the space 18 filled with oxygen fed only from the branch pipe 14 for the main delivery of Dxygen.
The present invention makes it possible to reduce the metal intensity of the device.
In addition the present invention allows the operation and servicing of the device to be simplified.
00 0 0o 0 o o o ao 0 0 0 C0 0 000 i
Claims (6)
1. A device for delivery of the charge-oxygen mixture in a metallurgical furnace, comprising a housing, a first branch pipe for delivery of the charge into the housing, a charge-oxygen mixer located within the housing and being connected to the first branch pipe and arranged such that a space is formed between the first branch pipe, charge-oxygen mixer, and the housing, and a second branch pipe for the main delivery of oxgyen into said space, wherein the housing forms a closed chamber and the charge oxygen mixer is made in the form of a stepped cone shaped bell mouth disposed 00 go 0 inside the closed chamber and provided with stepped 0 o portions, each of which has orifices equally spaced along 0 eF o 0 15 its circumferences with the axis thereof being inclined in 0000 one direction relatively to the walls of the stepped bell o 0 r 00. a mouth, the stepped portion having the largest diameter being 00 4 rigidly coupled with the closed chamber and the stepped portion having the smallest diameter being rigidly coupled to the first branch pipe, with the said space being formed by the external surfaces of the stepped bell mouth, a portion of the first branch pipe and the internal surface of S the closed chamber, at least part of the internal surface of the closed chamber being curved and the second branch pipe a4 It S 25 being arranged to introduce oxygen into the housing substantially at a tangent to the curved portion of the closed chamber. Sr
2. A device according to claim 1 wherein means for an additional delivery of oxygen is provided and which is connected to the first branch pipe.
3. A device according to claim 2 wherein the means for an additional delivery of oxygen comprises a nozzle, having an outlet end which is passed into the stepped bell mouth, the first branch pipe having a longitudinal axis and the nozzle being arranged along said longitudinal axis, the nozzle being connected to the first branch pipe by way of a coupling element. C 8484S/KLS 11 \J
4. A device according to claim 3 wherein the first branch pipe is curved and the nozzle incorporates an inlet end which is arranged to pass through a hole made in the wall of the branch pipe and wherein the coupling element includes a locking element which is disposed outside the first branch pipe and is arranged to secure the inlet end of the nozzle relative to the first branch pipe.
A device according to claim 3 wherein the coupling element comprises a plurality of pipes in the form of a cross, the centre of the cross communicating with the inlet end of nozzle and being disposed inside a portion of the I 15 first branch pipe located within the closed chamber, the pipes being arranged to extend through the wall of the portion of the first chamber such that the outer end of each 1 of the pipes communicate with the said space.
6. A device for delivery of charge oxygen mixture in a metallurgical furnace substantially as herein described with reference to the accompanying drawings. DATED this 5th day of March 1991 VSESOJUZNY MAUCHNO-ISSLEDOVATELSKY GORNO-METALLURGICHESKY INSTITUT TSVETNYKH METALLOV (VNIITSVETMET) By their Patent Attorneys GRIFFITH HACK CO Pr. 8484S/KLS 12
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883832843 DE3832843C1 (en) | 1988-09-28 | 1988-09-28 | Device for supplying a charging-oxygen mixture to a smelting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2567388A AU2567388A (en) | 1990-07-19 |
| AU613111B2 true AU613111B2 (en) | 1991-07-25 |
Family
ID=6363849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU25673/88A Ceased AU613111B2 (en) | 1988-09-28 | 1988-11-17 | Device for delivery of charge-oxygen mixture in metallurgical furnace |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2588764B2 (en) |
| AU (1) | AU613111B2 (en) |
| DE (1) | DE3832843C1 (en) |
| FR (1) | FR2637359B1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI88517C (en) * | 1990-01-25 | 1993-05-25 | Outokumpu Oy | Saett och anordning Foer inmatning av reaktionsaemnen i en smaeltugn |
| FI94151C (en) * | 1992-06-01 | 1995-07-25 | Outokumpu Research Oy | Methods for regulating the supply of reaction gas to a furnace and multifunctional burner intended for this purpose |
| FI94152C (en) * | 1992-06-01 | 1995-07-25 | Outokumpu Eng Contract | Methods and apparatus for the oxidation of fuel in powder form with two gases with different oxygen levels |
| AT407193B (en) * | 1994-01-12 | 2001-01-25 | Voest Alpine Ind Anlagen | DEVICE FOR CHARGING GRANULAR USE IN A Melting Furnace |
| FI108865B (en) * | 2000-12-20 | 2002-04-15 | Outokumpu Oy | Device for feeding a solid material and oxidation gas into a suspension smelting furnace |
| EP2381036B1 (en) * | 2010-04-23 | 2013-06-19 | Beheersmaatschappij Verstraeten B.V. | Drill |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU269766B2 (en) * | 1963-02-18 | 1964-08-20 | Mian Huhlenbau Und Industrie G. M. B. H | Method of and apparatus for continuously treating granular and / or powdered material with gas |
| AU422152B2 (en) * | 1968-02-16 | 1972-03-07 | Monzino Riotinto Of Australia Limited | Method and apparatus for refining metals |
| AU504129B2 (en) * | 1976-02-24 | 1979-10-04 | Lambert, J.R. | Furnace for particulate material |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1292144A (en) * | 1961-06-14 | 1962-04-27 | Arbed | Method and device for injection from above into a metal bath |
| FR2432552A1 (en) * | 1978-08-03 | 1980-02-29 | Siderurgie Fse Inst Rech | Immersion lance consisting of two concentric tubes - esp. for injecting powder into molten iron or steel and using two tubes with the same outlet bore dia. |
| DE3212100C2 (en) * | 1982-04-01 | 1985-11-28 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Method and device for performing pyrometallurgical processes |
| SU1078225A1 (en) * | 1983-03-02 | 1984-03-07 | Государственный Ордена Трудового Красного Знамени Институт По Проектированию Предприятий Цветной Металлургии "Гипроцветмет" | Device for feeding charge-oxygen mixture into furnace |
-
1988
- 1988-09-28 DE DE19883832843 patent/DE3832843C1/en not_active Expired
- 1988-09-30 FR FR8812842A patent/FR2637359B1/en not_active Expired - Fee Related
- 1988-11-04 JP JP63277434A patent/JP2588764B2/en not_active Expired - Lifetime
- 1988-11-17 AU AU25673/88A patent/AU613111B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU269766B2 (en) * | 1963-02-18 | 1964-08-20 | Mian Huhlenbau Und Industrie G. M. B. H | Method of and apparatus for continuously treating granular and / or powdered material with gas |
| AU422152B2 (en) * | 1968-02-16 | 1972-03-07 | Monzino Riotinto Of Australia Limited | Method and apparatus for refining metals |
| AU504129B2 (en) * | 1976-02-24 | 1979-10-04 | Lambert, J.R. | Furnace for particulate material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02125022A (en) | 1990-05-14 |
| DE3832843C1 (en) | 1989-10-19 |
| AU2567388A (en) | 1990-07-19 |
| JP2588764B2 (en) | 1997-03-12 |
| FR2637359A1 (en) | 1990-04-06 |
| FR2637359B1 (en) | 1990-12-28 |
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