EP0372236A2 - Four à réduction électrothermique - Google Patents

Four à réduction électrothermique Download PDF

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Publication number
EP0372236A2
EP0372236A2 EP89120536A EP89120536A EP0372236A2 EP 0372236 A2 EP0372236 A2 EP 0372236A2 EP 89120536 A EP89120536 A EP 89120536A EP 89120536 A EP89120536 A EP 89120536A EP 0372236 A2 EP0372236 A2 EP 0372236A2
Authority
EP
European Patent Office
Prior art keywords
central tube
electrodes
reduction furnace
electrothermal reduction
iron sheet
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
EP89120536A
Other languages
German (de)
English (en)
Other versions
EP0372236B1 (fr
EP0372236A3 (fr
Inventor
Joachim Dr. Stendel
Georg Baumann
Karl Horn
Dieter Mandelkow
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Publication of EP0372236A2 publication Critical patent/EP0372236A2/fr
Publication of EP0372236A3 publication Critical patent/EP0372236A3/fr
Application granted granted Critical
Publication of EP0372236B1 publication Critical patent/EP0372236B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • H05B7/08—Electrodes non-consumable
    • H05B7/085—Electrodes non-consumable mainly consisting of carbon
    • H05B7/09—Self-baking electrodes, e.g. Söderberg type electrodes
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/02—Ohmic resistance heating
    • F27D11/04—Ohmic resistance heating with direct passage of current through the material being heated

Definitions

  • the present invention relates to an electrothermal reduction furnace for the production of yellow phosphorus from a mixture of raw materials composed of raw phosphate, gravel and coke, which consists of a furnace vessel closed with a reinforced concrete ceiling, the concrete ceiling being penetrated by a number of Moeller feed pipes and by a number of S ⁇ DERBERG electrodes, and wherein the electrodes in the area of their penetration of the concrete ceiling are encircled by deep sockets having power supply plates.
  • a phosphor furnace which consists of a furnace vessel closed with a furnace roof.
  • the lower part of the furnace vessel has at least one slag rack and at least one ferrophosphorus rack.
  • the bottom and the lower jacket part of the furnace vessel are lined with carbon bricks, while the upper area of the inner wall of the furnace vessel is provided with fireclay masonry.
  • the furnace ceiling is penetrated by several feed pipes and three S ⁇ DERBERG electrodes, each of which is encircled by a deep socket in the penetration area (cf. "Ullmanns Encyklopadie der Technische Chemie", volume 18, 4th edition, 1979, pages 291 and 292).
  • a disadvantage of the known phosphorus furnace is that the S ⁇ DERBERG mass filled into the electrodes and containing parts which can be evaporated to reduce their viscosity, for example anthracene oil, shows a "shrinking phenomenon" when using hollow electrodes, which goes beyond the normal volume contraction which results from the burning process, ie the transition from the S ⁇ DERBERG mass to finished carbon electrode results.
  • the level of the electrode mass in the sheet iron jacket can decrease in the course of a day by a length which corresponds to the normal erosion of several days. Obviously, not sufficiently solidified electrode mass remains flowable under the pressure of the further electrode mass resting on it in the lower region of the iron sheet jacket and reaches the reduction furnace.
  • the electrodes are hollow electrodes in which a central tube is arranged centrally in the sheet iron jacket; that sheet metal disks are mounted on the central tube at a distance from each other; and that the central tube is centered in the iron sheet jacket with spacer bars distributed over the circumference.
  • the sheet metal disks pushed onto the central tube which are spaced apart from one another by 50 cm, for example in the case of an iron sheet jacket with a diameter of 135 cm, serve as baffles against the sliding electrode mass.
  • the non-positive connection between the iron sheet jacket and the central tube with the aid of the spacer bars causes an electrical secondary current to flow from the power supply plates over the iron sheet jacket and the central tube into the reduction oven.
  • the current heat of the secondary flow ensures that the central tube in the area below the power supply plates also has a temperature of more than 800 ° C when the central tube is fully charged with the cold fine-grained mixture of oils introduced with the aid of a flushing gas.
  • the high temperature of the central tube prevents the escaping from the pitch contained in the S ⁇ DERBERG mass evaporated, glide-promoting components, such as anthracene oil, condense on its outer wall.
  • An electrothermal reduction furnace consists of an iron furnace vessel 1, the bottom area and the lower casing part of which are lined with carbon bricks 2, while the inner wall of its remaining casing area is provided with fireclay masonry 3.
  • the furnace vessel 1 has a slag tap 4 and a ferrophosphorus tap 5 in its lower region.
  • the top of the furnace vessel 1 is closed with a reinforced concrete ceiling 6, which is penetrated by several feed pipes 7 connected to Möller bunkers, not shown, and by three S ⁇ DERBERG electrodes 8.
  • the electrodes 8 are encompassed in the area of their penetration of the concrete ceiling 6 by a deep socket 9, in which there are current supply plates 10 which are connected in an electrically conductive manner to transformers (not shown).
  • the electrodes 8 are hollow electrodes, in which a central tube 12 is arranged centrally in the iron sheet jacket 11.
  • the iron sheet jacket 11 is frictionally connected to the power supply plates 10.
  • Sheet metal disks 13 are mounted on the central tube 12 at a distance from one another, while their centering takes place by means of spacer bars 14 distributed over the circumference, which are welded to the iron sheet jacket 11 and the central tube 12.
  • an electrical secondary current flows from the power supply plates 10 via the iron sheet jacket 11 and the spacer bars 14 to the central tube 12 and thus into the electrothermal reduction furnace.
  • This secondary electrical current prevents the central tube 12, through which cold, fine-grained furniture mixture suspended in cold flushing gas is blown, from cooling below 800.degree.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Electrolytic Production Of Metals (AREA)
EP19890120536 1988-12-03 1989-11-06 Four à réduction électrothermique. Expired - Lifetime EP0372236B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840827 1988-12-03
DE19883840827 DE3840827A1 (de) 1988-12-03 1988-12-03 Elektrothermischer reduktionsofen

Publications (3)

Publication Number Publication Date
EP0372236A2 true EP0372236A2 (fr) 1990-06-13
EP0372236A3 EP0372236A3 (fr) 1991-01-16
EP0372236B1 EP0372236B1 (fr) 1993-10-27

Family

ID=6368431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890120536 Expired - Lifetime EP0372236B1 (fr) 1988-12-03 1989-11-06 Four à réduction électrothermique.

Country Status (3)

Country Link
EP (1) EP0372236B1 (fr)
CN (1) CN1017085B (fr)
DE (1) DE3840827A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998051129A1 (fr) * 1997-05-02 1998-11-12 Silicium Becancour Inc. Electrode de type söderberg destinee a la fabrication d'alliages de silicium et de metaux a base de silicium
US5854807A (en) * 1997-05-02 1998-12-29 Skw Canada Inc. Electrode for silicon alloys and silicon metal
FR2770079A1 (fr) * 1997-10-22 1999-04-23 Action Finances Ind Electrode composite de four electrique de metallurgie
WO2000011226A1 (fr) * 1998-08-25 2000-03-02 Pyromet (Proprietary) Limited Electrode composite de type söderberg pour four de fusion a arc

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886172A (zh) * 2010-06-19 2010-11-17 鹤壁银龙有色金属科技有限公司 一种无罐立式电热炼金属钙还原炉
CN103466572B (zh) * 2013-08-29 2014-12-24 昆明会丰工贸有限责任公司 小黄磷平顶炉盖喷顶施工工艺及配方

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE529118C (de) * 1925-06-06 1931-07-10 Josias Rees Metallarmierte kontinuierliche Kohlenelektrode fuer elektrische OEfen
US3524004A (en) * 1968-12-03 1970-08-11 Ohio Ferro Alloys Corp Non-metal reinforced self-baking electrode for electric furnaces
US4133968A (en) * 1977-05-26 1979-01-09 Frolov Jury F Apparatus for forming self-sintering electrodes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE529118C (de) * 1925-06-06 1931-07-10 Josias Rees Metallarmierte kontinuierliche Kohlenelektrode fuer elektrische OEfen
US3524004A (en) * 1968-12-03 1970-08-11 Ohio Ferro Alloys Corp Non-metal reinforced self-baking electrode for electric furnaces
US4133968A (en) * 1977-05-26 1979-01-09 Frolov Jury F Apparatus for forming self-sintering electrodes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998051129A1 (fr) * 1997-05-02 1998-11-12 Silicium Becancour Inc. Electrode de type söderberg destinee a la fabrication d'alliages de silicium et de metaux a base de silicium
US5854807A (en) * 1997-05-02 1998-12-29 Skw Canada Inc. Electrode for silicon alloys and silicon metal
FR2770079A1 (fr) * 1997-10-22 1999-04-23 Action Finances Ind Electrode composite de four electrique de metallurgie
WO2000011226A1 (fr) * 1998-08-25 2000-03-02 Pyromet (Proprietary) Limited Electrode composite de type söderberg pour four de fusion a arc
US6452956B1 (en) * 1998-08-25 2002-09-17 Marcel Sciarone Soderberg-type composite electrode for arc smelting furnace

Also Published As

Publication number Publication date
CN1043557A (zh) 1990-07-04
DE3840827A1 (de) 1990-06-07
EP0372236B1 (fr) 1993-10-27
CN1017085B (zh) 1992-06-17
EP0372236A3 (fr) 1991-01-16

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