EP0056880A1 - Process for the production of an agglomerated burden for zinc shaft furnaces - Google Patents

Process for the production of an agglomerated burden for zinc shaft furnaces Download PDF

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Publication number
EP0056880A1
EP0056880A1 EP81201243A EP81201243A EP0056880A1 EP 0056880 A1 EP0056880 A1 EP 0056880A1 EP 81201243 A EP81201243 A EP 81201243A EP 81201243 A EP81201243 A EP 81201243A EP 0056880 A1 EP0056880 A1 EP 0056880A1
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Prior art keywords
lead
content
roasted material
zinc
roasted
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EP81201243A
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German (de)
French (fr)
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EP0056880B1 (en
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Dirk Dr. Dipl.-Chem. Hankel
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GEA Group AG
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Metallgesellschaft AG
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    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/02—Preliminary treatment of ores; Preliminary refining of zinc oxide
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating

Definitions

  • the invention relates to a method for producing a briquetted feedstock for zinc shaft furnaces, wherein roasted material containing zinc oxide is subjected to hot briquetting from a fluidized bed roasting.
  • the sulfidic ore concentrates must first be roasted and made into pieces.
  • Sinter roasting on a traveling grate is relatively complex, leads to exhaust gas with a relatively low SO 2 content and causes problems with regard to environmental pollution.
  • the roasting in the fluidized bed largely avoids these problems, but the roasted fine-grained material has to be made into pieces in a separate process step.
  • the object of the invention is to produce briquettes from the roasted material of fluidized bed roasts with as little effort as possible, which have good properties for processing in a zinc shaft furnace.
  • This object is achieved according to the invention in that a metallic lead content unc or lead oxide content of at least 3%, calculated as BLei, is set in the roasted material, non-baking coal with a low content of volatile constituents is mixed with the roasted material, the ratio of Pb to C in% by weight is set to at least 1, and the mixture is triquetted at a pressing temperature of 250 to 470 ° C. under a pressing pressure of 4 to 20 t / cm roll width, measured dynamically.
  • the roasted material is obtained as bed discharge, cyclone discharge and possibly discharge from other dedusting plants in a wide grain range of approximately 0 to 5 mm.
  • the vast majority is in a grain size of less than 2 mm. It is very important that the individual discharges are mixed very well.
  • the mixed metallic lead and / or oxidic lead generally comes from the operation of the zinc shaft furnace itself, such as. B. Traß from the pump sump of the condenser, dust from the room dust and filter sludge from the gas scrubbing.
  • the substances containing the metallic lead and / or oxidic lead are also used in a grain size of about 0 to 5 mm.
  • the addition of metallic lead and / or lead oxide can be up to about 15% by weight, calculated as lead.
  • the non-baking coals can have a volatile content of up to about 6% by weight, such as coke breeze and anthracite. Temperatures in the upper range of the pressing temperature result in higher strength of the briquettes. This also applies to higher pressures. The pressures are measured dynamically, i.e. during the operation of the press.
  • a preferred embodiment consists in that the lead content is 3 to 12%, the carbon content is 2 to 6% and the ratio of Pb to C is set to 1.5 to 2. These areas result in briquettes with particularly good properties.
  • the roasted goods were each treated with briquette residues (2 to 8 mm) and, if necessary, with lead-containing returns from the zinc shaft furnace (40% Zn, 30% Pb, 100% ⁇ 3 mm) or returns plus coke breeze (2.9% volatile components, 100% ⁇ 0.5 mm) mixed hot and briquetted in a heat on a semi-technical double-roll press (diameter 500 mm, 44 m wide).
  • the advantages of the invention are that the pellets have a good initial reducibility and thus a good overall reducibility in a relatively short time, have good and sufficient mechanical strength, can be produced without great effort, and the briquetting takes place without subsequent heating of the discharge material of the fluidized bed can.

Abstract

Zinkoxid enthaltendes Röstgut aus einer Wirbelschichtröstung wird einer Heißrikettierung unterworfen. Zur Erzeugung von Briketts mit guten Eigenschaften für eine Verarbeitung im Zinkschachtofen wird in dem Röstgut ein metallischer Bleigehalt und/oder Bleioxidgehalt von mindestens 3%, gerechnet als Blei, eingestellt, dem Röstgut nichtbackende Kohle mit geringem Gehalt an flüchtigen Bestandteilen zugemischt, das Verhältnis von Pb zu C in Gew. -% auf mindestens 1 eingestellt und die Mischung bei einer Preßtemperatur von 250 bis 470°C unter einem Preßdruck von 4 bis 20 t/cm Walzenbreite, dynamisch gemessen, brikettiert.Roasted material from a fluidized bed roasting containing zinc oxide is subjected to hot-labeling. To produce briquettes with good properties for processing in a zinc shaft furnace, a metallic lead content and / or lead oxide content of at least 3%, calculated as lead, is set in the roasted material, non-baking coal with a low content of volatile constituents is mixed into the roasted material, the ratio of Pb to C in% by weight is set to at least 1 and the mixture is briquetted dynamically at a press temperature of 250 to 470 ° C. under a press pressure of 4 to 20 t / cm roll width.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines brikettierten Einsatzmaterials für Zink-Schachtöfen, wobei Zinkoxid enthaltendes Röstgut aus einer Wirbelschichtröstung einer Heißbrikettierung unterworfen wird.The invention relates to a method for producing a briquetted feedstock for zinc shaft furnaces, wherein roasted material containing zinc oxide is subjected to hot briquetting from a fluidized bed roasting.

Für die Zinkgewinnung im Schachtofen müssen die sulfidischen Erzkonzentrate vorher abgeröstet und stückig gemacht werden. Die Sinterröstung auf einem Wanderrost ist relativ aufwendig, führt zu einem Abgas mit relativ niedrigem SO2-Gehalt und verursacht Probleme im Hinblick auf die Verschmutzung der Umwelt. Die Röstung in der Wirbelschicht vermeidet zwar diese Probleme weitgehend, jedoch muß das abgeröstete feinkörnige Material in einem separaten Verfahrensschritt in stückige Form gebracht werden.To extract zinc in the shaft furnace, the sulfidic ore concentrates must first be roasted and made into pieces. Sinter roasting on a traveling grate is relatively complex, leads to exhaust gas with a relatively low SO 2 content and causes problems with regard to environmental pollution. The roasting in the fluidized bed largely avoids these problems, but the roasted fine-grained material has to be made into pieces in a separate process step.

Aus der GB-PS 13 02 864 ist es bekannt, das Röstgut aus einer Wirbelschichtröstung ohne Zusatz von kohlenstoffhaltigen Bindemitteln bei Temperaturen von mindestens 500 °C und einem Druck von 0,157 bis 3,15 t/cm2 zu brikettieren. Die Reduzierbarkeit ist gegenüber Sinter jedoch wesentlich schlechter.From GB-PS 13 02 864 it is known to briquette the roasted material from a fluidized bed roasting without the addition of carbon-containing binders at temperatures of at least 500 ° C. and a pressure of 0.157 to 3.15 t / cm 2 . However, the reducibility is significantly worse compared to sinter.

Aus der DE-AS 23 60 346 ist es bekannt, Briketts unter Einbindung von Koksgrus herzustellen. Dazu muß aber das Zinkoxid und gegebenenfalls Bleioxid sehr feinkörnig sein, wie es z. B. als Wälz-Oxid anfällt. Weiterhin muß dieses pulverförmige Material zunächst zu Pellets mit einem Durchmesser von 2 bis 10 mm geformt werden, ehe die Brikettierung der auf 500 bis 800 °C erwärmten Pellets erfolgt. Der Pelletiervorgang bedeutet einen zusätzlichen Arbeitsgang, außerdem müssen die Pellets vor der Brikettierung getrocknet werden, da sonst die Briketts platzen und Feuchtigkeit im Zinkschachtofen unerwünscht ist (Reoxidation des Zn-Dampfes).From DE-AS 23 60 346 it is known to produce briquettes incorporating coke breeze. To do this, however, the zinc oxide and possibly lead oxide must be very fine-grained, how it z. B. occurs as rolling oxide. Furthermore, this powdery material must first be shaped into pellets with a diameter of 2 to 10 mm before the briquetting of the pellets heated to 500 to 800 ° C takes place. The pelletizing process means an additional work step, in addition the pellets must be dried before the briquetting, otherwise the briquettes will burst and moisture in the zinc shaft furnace is undesirable (reoxidation of the Zn vapor).

Aus V. Tafel "Lehrbuch der Metallhüttenkunde" 1953, Band II, Seiten 518/19 ist es bekannt, für das Zinkgewinnungsverfahren der stehenden Muffel das Röstgut mit backender Kohle unter Zusatz eines Bindemittels zu brikettieren und die Briketts vor dem Einsatz in die Muffeln zu verkoken. Weiterhin ist es bekannt, Erze oder oxidische Stoffe unter Zusatz von backenden Kohlen öder bituminösen Bindemitteln zu brikettieren, wobei diese durch Erhitzung in den plastischen Bereich gebracht werden (DE-AS 12 52 623, DE-OS 23 35 669, DE-PS 718 967, US-PS 3 212 877). Bei diesen Verfahren muß eine separate Verkokung erfolgen und es besteht die Gefahr von Rissebildung und Zerplatzen der Briketts durch ausgetriebene flüchtige Bestandteile.From V. Tafel "Textbook of Metallurgy" 1953, Volume II, pages 518/19, it is known for the zinc extraction process of the standing muffle to briquette the roasted material with baking coal with the addition of a binder and to coke the briquettes into the muffle before use . Furthermore, it is known to briquette ores or oxidic substances with the addition of baking coals or bituminous binders, these being brought into the plastic region by heating (DE-AS 12 52 623, DE-OS 23 35 669, DE-PS 718 967 , U.S. Patent 3,212,877). These processes require separate coking and there is a risk of cracking and bursting of the briquettes due to the volatile components expelled.

Der Erfindung liegt die Aufgabe zugrunde, mit möglichst geringem Aufwand aus dem Röstgut von Wirbelschichtröstungen Briketts herzustellen, die gute Eigenschaften für die Verarbeitung im Zinkschachtofen besitzen.The object of the invention is to produce briquettes from the roasted material of fluidized bed roasts with as little effort as possible, which have good properties for processing in a zinc shaft furnace.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß dadurch, daß in dem Röstgut ein metallischer Bleigehalt unc./oder Bleioxidgehalt von mindestens 3 %, gerechnet als BLei, eingestellt wird, dem Röstgut nichtbackende Kohle mit geringem Gehalt an flüchtigen Bestandteilen zugem:ischt wird, das Verhältnis von Pb zu C in Gew.-% auf mindestens 1 eingestellt wird, und die Mischung bei einer Preßtemperatur von 250 bis 470 °C unter einem Preßdruck vcn 4 bis 20 t/cm Walzenbreite, dynamisch gemessen, trikettiert wird.This object is achieved according to the invention in that a metallic lead content unc or lead oxide content of at least 3%, calculated as BLei, is set in the roasted material, non-baking coal with a low content of volatile constituents is mixed with the roasted material, the ratio of Pb to C in% by weight is set to at least 1, and the mixture is triquetted at a pressing temperature of 250 to 470 ° C. under a pressing pressure of 4 to 20 t / cm roll width, measured dynamically.

Das Röstgut fällt als Bett-Austrag, Zyklon-Austrag und eventuell Austrag aus weiteren Entstaubungsanlagen in einem weiten Kornbereich von etwa 0 bis 5 mm an. Der weitaus größte Teil liegt in einer Korngröße unter 2 mm vor. Es ist sehr wichtig, daß die einzelnen Austräge sehr gut miteinander vermischt werden. Das zugemischte metallische Blei und/oder oxidische Blei stammt im allgemeinen aus dem Betrieb des Zink-Schachtofens selbst, wie z. B. Traß aus dem Pumpensumpf des Kondensers, Staub aus der Raumentstaubung und Filterschlamm aus der Gaswäsche. Die das metallische Blei und/oder oxidische Blei enthaltenden Stoffe werden ebenfalls in einer Korngröße von etwa 0 bis 5 mm eingesetzt. Der Zusatz an metallischem Blei und/oder Bleioxid kann bis zu etwa 15 Gew.-%, gerechnet als Blei, betragen. Die nichtbackenden Kohlen können einen Gehalt an flüchtigen Bestandteilen bis zu etwa 6 Gew.-% haben, wie Koksgrus und Anthrazite. Temperaturen im oberen Bereich der Preßtemperatur ergeben höhere Festigkeiten der Briketts. Dies trifft ebenfalls für höhere Preßdrücke zu. Die Preßdrücke werden dynamisch gemessen, d.h. während des Betriebes der Presse.The roasted material is obtained as bed discharge, cyclone discharge and possibly discharge from other dedusting plants in a wide grain range of approximately 0 to 5 mm. The vast majority is in a grain size of less than 2 mm. It is very important that the individual discharges are mixed very well. The mixed metallic lead and / or oxidic lead generally comes from the operation of the zinc shaft furnace itself, such as. B. Traß from the pump sump of the condenser, dust from the room dust and filter sludge from the gas scrubbing. The substances containing the metallic lead and / or oxidic lead are also used in a grain size of about 0 to 5 mm. The addition of metallic lead and / or lead oxide can be up to about 15% by weight, calculated as lead. The non-baking coals can have a volatile content of up to about 6% by weight, such as coke breeze and anthracite. Temperatures in the upper range of the pressing temperature result in higher strength of the briquettes. This also applies to higher pressures. The pressures are measured dynamically, i.e. during the operation of the press.

Eine vorzugsweise Ausgestaltung besteht-darin, daß der Bleigehalt 3 bis 12 % beträgt,.der Kohlenstoffgehalt 2 bis 6 % beträgt und das Verhältnis von Pb zu C auf 1,5 bis 2 eingestellt wird. Diese Bereiche ergeben Briketts mit besonders guten Eigenschaften.A preferred embodiment consists in that the lead content is 3 to 12%, the carbon content is 2 to 6% and the ratio of Pb to C is set to 1.5 to 2. These areas result in briquettes with particularly good properties.

Die Erfindung wird an Hand von Beispielen näher erläutert.The invention is explained in more detail by means of examples.

Beispiel 1example 1

Es wurde eine Zinkblende mit folgender Zusammensetzung und Körnung in einer halbtechnischen Wirbelschichtanlage geröstet:

  • 47,7 % Zn
  • 1,75 % Pb
  • 11,5 % Fe
  • 31,8 % S
  • 98,4 % < 2,000 mm
  • 88,4 % < 0,045 mm
A zinc screen with the following composition and grain size was roasted in a semi-technical fluid bed system:
  • 47.7% Zn
  • 1.75% Pb
  • 11.5% Fe
  • 31.8% p
  • 98.4% <2,000 mm
  • 88.4% <0.045 mm

Das Röstgut (Mischung aus Bettaustrag + Zyklonausträgen) hatte folgende Kornzusammensetzung:

  • 98,2 % < 2,000 mm
  • 39,1 % < 0,045 mm
  • 5,0% < 0,016 mm
The roasted material (mixture of bed discharge + cyclone discharges) had the following grain composition:
  • 98.2% <2,000 mm
  • 39.1% <0.045 mm
  • 5.0% <0.016 mm

Das Röstgut wurde jeweils mit Brikettier-Rückgut (2 bis 8 mm) und gegebenenfalls mit bleihaltigen Rückläufen aus dem Zinkschachtofen (40 % Zn, 30 % Pb, 100 % < 3 mm) bzw. Rückläufen plus Koksgrus (2,9 % flüchtige Bestandteile, 100 % < 0, 5 mm) heiß gemischt und, in einer Hitze, auf einer halbtechnischen Doppelwalzenpresse (Durchmesser 500 mm, 44 m breit) brikettiert.

Figure imgb0001
Figure imgb0002
Figure imgb0003
 The roasted goods were each treated with briquette residues (2 to 8 mm) and, if necessary, with lead-containing returns from the zinc shaft furnace (40% Zn, 30% Pb, 100% <3 mm) or returns plus coke breeze (2.9% volatile components, 100% <0.5 mm) mixed hot and briquetted in a heat on a semi-technical double-roll press (diameter 500 mm, 44 m wide).
Figure imgb0001
Figure imgb0002
Figure imgb0003

Beispiel 2Example 2

Es wurden zwei Brikettierversuche mit dem Röstgut ohne Zuschläge, jedoch bei unterschiedlichen Versuchsbedingungen durchgeführt.Two briquetting tests were carried out with the roasted material without additives, but under different test conditions.

Figure imgb0004
Figure imgb0004

Bei Versuch Nr. 1 waren die Brikettierbedingungen also deutlich günstiger. Dies macht sich bei den Brikettqualitäten und der Brikettierleistung bemerkbar:

Figure imgb0005
In experiment No. 1, the briquetting conditions were therefore significantly more favorable. This is noticeable in the briquette qualities and the briquetting performance:
Figure imgb0005

Beispiel 3Example 3

Es wurden je 10 Briketts aus den Versuchen Nr. 4 und 5 getestet:10 briquettes from tests No. 4 and 5 were tested:

Figure imgb0006
Figure imgb0006

Die Festigkeit nach teilweiser Reduktion ist in der Figur dargestellt.The strength after partial reduction is shown in the figure.

Die Vorteile der Erfindung bestehen darin, daß die Pellets eine gute Anfangsreduzierbarkeit und damit eine gute Gesamtreduzierbarkeit in relativ kurzer Zeit aufweisen, eine gute und ausreichende mechanische Festigkeit besitzen, ohne großen Aufwand hergestellt werden können, und die Brikettierung ohne nachträgliche Aufheizung des Austragsmaterials der Wirbelschicht erfolgen kann.The advantages of the invention are that the pellets have a good initial reducibility and thus a good overall reducibility in a relatively short time, have good and sufficient mechanical strength, can be produced without great effort, and the briquetting takes place without subsequent heating of the discharge material of the fluidized bed can.

Claims (2)

1. Verfahren zur Herstellung eines brikettierten Einsatzmaterials für Zink-Schachtöfen, wobei Zinkoxid enthaltendes Röstgut aus einer Wirbelschichtröstung einer Heißbrikettierung unterworfen wird, dadurch gekennzeichnet, daß in dem Röstgut ein metallischer Bleigehalt und/oder Bleioxidgehalt von mindestens 3 %, gerechnet als Blei, eingestellt wird, dem Röstgut nichtbackende Kohle mit geringem Gehalt an flüchtigen Bestandteilen zugemischt wird, das Verhältnis von Pb zu C in Gew.-% auf mindestens 1 eingestellt wird, und die Mischung bei einer Preßtemperatur von 250 bis 470 °C unter einem Preßdruck von 4 bis 20 t/cm Walzenbreite, dynamisch gemessen, brikettiert wird.1. A process for the production of a briquetted feedstock for zinc shaft furnaces, wherein roasted material containing zinc oxide from a fluidized bed roasting is subjected to hot briquetting, characterized in that a metallic lead content and / or lead oxide content of at least 3%, calculated as lead, is set in the roasted material , the roasted material is mixed with non-baking coal with a low volatile content, the ratio of Pb to C in% by weight is set to at least 1, and the mixture at a pressing temperature of 250 to 470 ° C. under a pressing pressure of 4 to 20 t / cm roller width, measured dynamically, briquetting. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Bleigehalt 3 bis 12% beträgt, der Kohlenstoffgehalt 2 bis 6 % beträgt und das Verhältnis von Pb zu C auf 1,5 bis 2 eingestellt wird.2. The method according to claim 1, characterized in that the lead content is 3 to 12%, the carbon content is 2 to 6% and the ratio of Pb to C is set to 1.5 to 2.
EP81201243A 1981-01-22 1981-11-02 Process for the production of an agglomerated burden for zinc shaft furnaces Expired EP0056880B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3101886 1981-01-22
DE19813101886 DE3101886A1 (en) 1981-01-22 1981-01-22 METHOD FOR PRODUCING A BRIQUETTED INSERT MATERIAL FOR ZINC CHAMBER OVENS

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EP0056880A1 true EP0056880A1 (en) 1982-08-04
EP0056880B1 EP0056880B1 (en) 1984-06-20

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US (1) US4525207A (en)
EP (1) EP0056880B1 (en)
JP (1) JPS57143446A (en)
DE (2) DE3101886A1 (en)
PL (1) PL234779A1 (en)
RO (1) RO84192B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0215210A1 (en) * 1985-08-14 1987-03-25 Thyssen Stahl Aktiengesellschaft Process and installation for preparing binder-free hot-briquets
US5525929A (en) * 1993-11-24 1996-06-11 Nec Corporation Transimpedance amplifier circuit with feedback and load resistor variable circuits

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2087557C (en) * 1992-07-31 2000-04-25 Matthew Raskin Method for removing catalyst
JP2580799Y2 (en) * 1993-05-25 1998-09-17 三相電機株式会社 Electric motor and its stator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041256B (en) * 1953-05-13 1958-10-16 Nat Smelting Co Ltd Process for the extraction of lead and zinc
DE1247667B (en) * 1963-09-30 1967-08-17 Brevets Metallurgiques Process for operating a shaft furnace for zinc extraction
GB1181874A (en) * 1966-05-17 1970-02-18 Boliden Ab A method of Converting a Finely-Grained Material to a more Coarsely-Grained Material
US3523786A (en) * 1966-07-05 1970-08-11 Metallurgical Processes Ltd Method of operating and controlling a zinc blast furnace
DE2034791A1 (en) * 1969-07-14 1971-02-04 Brevets Metallurgiques, S A , Freiburg (Schweiz) Process for the preparation of loading material for blow shaft furnaces
DE2335669A1 (en) * 1973-07-13 1975-02-06 Metallgesellschaft Ag PROCESS FOR THE MANUFACTURING OF ORECAKE HOT BRIQUETTES FOR SELF-DIVIDING
US3946098A (en) * 1972-12-11 1976-03-23 Metallurgical Processes Ltd. Preparation of feed material for a blast furnace

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA793158B (en) * 1978-07-04 1980-07-30 Isc Smelting Roasting of sulphide materials

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041256B (en) * 1953-05-13 1958-10-16 Nat Smelting Co Ltd Process for the extraction of lead and zinc
DE1247667B (en) * 1963-09-30 1967-08-17 Brevets Metallurgiques Process for operating a shaft furnace for zinc extraction
GB1181874A (en) * 1966-05-17 1970-02-18 Boliden Ab A method of Converting a Finely-Grained Material to a more Coarsely-Grained Material
US3523786A (en) * 1966-07-05 1970-08-11 Metallurgical Processes Ltd Method of operating and controlling a zinc blast furnace
DE2034791A1 (en) * 1969-07-14 1971-02-04 Brevets Metallurgiques, S A , Freiburg (Schweiz) Process for the preparation of loading material for blow shaft furnaces
US3946098A (en) * 1972-12-11 1976-03-23 Metallurgical Processes Ltd. Preparation of feed material for a blast furnace
DE2335669A1 (en) * 1973-07-13 1975-02-06 Metallgesellschaft Ag PROCESS FOR THE MANUFACTURING OF ORECAKE HOT BRIQUETTES FOR SELF-DIVIDING

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0215210A1 (en) * 1985-08-14 1987-03-25 Thyssen Stahl Aktiengesellschaft Process and installation for preparing binder-free hot-briquets
US5525929A (en) * 1993-11-24 1996-06-11 Nec Corporation Transimpedance amplifier circuit with feedback and load resistor variable circuits

Also Published As

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EP0056880B1 (en) 1984-06-20
JPS57143446A (en) 1982-09-04
RO84192B (en) 1984-07-30
RO84192A (en) 1984-05-23
US4525207A (en) 1985-06-25
PL234779A1 (en) 1982-08-16
DE3101886A1 (en) 1982-08-26
DE3164341D1 (en) 1984-07-26

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